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2525 lines
108 KiB
2525 lines
108 KiB
/*------------------------------------------------------------------------- |
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* drawElements Quality Program Tester Core |
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* ---------------------------------------- |
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* |
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* Copyright 2014 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*//*! |
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* \file |
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* \brief Rasterization verifier utils. |
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*//*--------------------------------------------------------------------*/ |
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#include "tcuRasterizationVerifier.hpp" |
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#include "tcuVector.hpp" |
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#include "tcuSurface.hpp" |
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#include "tcuTestLog.hpp" |
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#include "tcuTextureUtil.hpp" |
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#include "tcuVectorUtil.hpp" |
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#include "tcuFloat.hpp" |
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#include "deMath.h" |
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#include "rrRasterizer.hpp" |
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#include <limits> |
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namespace tcu |
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{ |
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namespace |
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{ |
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bool lineLineIntersect (const tcu::Vector<deInt64, 2>& line0Beg, const tcu::Vector<deInt64, 2>& line0End, const tcu::Vector<deInt64, 2>& line1Beg, const tcu::Vector<deInt64, 2>& line1End) |
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{ |
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typedef tcu::Vector<deInt64, 2> I64Vec2; |
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// Lines do not intersect if the other line's endpoints are on the same side |
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// otherwise, the do intersect |
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// Test line 0 |
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{ |
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const I64Vec2 line = line0End - line0Beg; |
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const I64Vec2 v0 = line1Beg - line0Beg; |
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const I64Vec2 v1 = line1End - line0Beg; |
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const deInt64 crossProduct0 = (line.x() * v0.y() - line.y() * v0.x()); |
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const deInt64 crossProduct1 = (line.x() * v1.y() - line.y() * v1.x()); |
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// check signs |
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if ((crossProduct0 < 0 && crossProduct1 < 0) || |
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(crossProduct0 > 0 && crossProduct1 > 0)) |
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return false; |
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} |
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// Test line 1 |
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{ |
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const I64Vec2 line = line1End - line1Beg; |
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const I64Vec2 v0 = line0Beg - line1Beg; |
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const I64Vec2 v1 = line0End - line1Beg; |
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const deInt64 crossProduct0 = (line.x() * v0.y() - line.y() * v0.x()); |
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const deInt64 crossProduct1 = (line.x() * v1.y() - line.y() * v1.x()); |
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// check signs |
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if ((crossProduct0 < 0 && crossProduct1 < 0) || |
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(crossProduct0 > 0 && crossProduct1 > 0)) |
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return false; |
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} |
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return true; |
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} |
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bool isTriangleClockwise (const tcu::Vec4& p0, const tcu::Vec4& p1, const tcu::Vec4& p2) |
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{ |
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const tcu::Vec2 u (p1.x() / p1.w() - p0.x() / p0.w(), p1.y() / p1.w() - p0.y() / p0.w()); |
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const tcu::Vec2 v (p2.x() / p2.w() - p0.x() / p0.w(), p2.y() / p2.w() - p0.y() / p0.w()); |
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const float crossProduct = (u.x() * v.y() - u.y() * v.x()); |
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return crossProduct > 0.0f; |
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} |
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bool compareColors (const tcu::RGBA& colorA, const tcu::RGBA& colorB, int redBits, int greenBits, int blueBits) |
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{ |
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const int thresholdRed = 1 << (8 - redBits); |
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const int thresholdGreen = 1 << (8 - greenBits); |
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const int thresholdBlue = 1 << (8 - blueBits); |
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return deAbs32(colorA.getRed() - colorB.getRed()) <= thresholdRed && |
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deAbs32(colorA.getGreen() - colorB.getGreen()) <= thresholdGreen && |
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deAbs32(colorA.getBlue() - colorB.getBlue()) <= thresholdBlue; |
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} |
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bool pixelNearLineSegment (const tcu::IVec2& pixel, const tcu::Vec2& p0, const tcu::Vec2& p1) |
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{ |
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const tcu::Vec2 pixelCenterPosition = tcu::Vec2((float)pixel.x() + 0.5f, (float)pixel.y() + 0.5f); |
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// "Near" = Distance from the line to the pixel is less than 2 * pixel_max_radius. (pixel_max_radius = sqrt(2) / 2) |
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const float maxPixelDistance = 1.414f; |
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const float maxPixelDistanceSquared = 2.0f; |
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// Near the line |
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{ |
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const tcu::Vec2 line = p1 - p0; |
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const tcu::Vec2 v = pixelCenterPosition - p0; |
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const float crossProduct = (line.x() * v.y() - line.y() * v.x()); |
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// distance to line: (line x v) / |line| |
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// |(line x v) / |line|| > maxPixelDistance |
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// ==> (line x v)^2 / |line|^2 > maxPixelDistance^2 |
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// ==> (line x v)^2 > maxPixelDistance^2 * |line|^2 |
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if (crossProduct * crossProduct > maxPixelDistanceSquared * tcu::lengthSquared(line)) |
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return false; |
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} |
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// Between the endpoints |
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{ |
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// distance from line endpoint 1 to pixel is less than line length + maxPixelDistance |
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const float maxDistance = tcu::length(p1 - p0) + maxPixelDistance; |
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if (tcu::length(pixelCenterPosition - p0) > maxDistance) |
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return false; |
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if (tcu::length(pixelCenterPosition - p1) > maxDistance) |
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return false; |
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} |
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return true; |
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} |
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bool pixelOnlyOnASharedEdge (const tcu::IVec2& pixel, const TriangleSceneSpec::SceneTriangle& triangle, const tcu::IVec2& viewportSize) |
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{ |
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if (triangle.sharedEdge[0] || triangle.sharedEdge[1] || triangle.sharedEdge[2]) |
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{ |
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const tcu::Vec2 triangleNormalizedDeviceSpace[3] = |
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{ |
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tcu::Vec2(triangle.positions[0].x() / triangle.positions[0].w(), triangle.positions[0].y() / triangle.positions[0].w()), |
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tcu::Vec2(triangle.positions[1].x() / triangle.positions[1].w(), triangle.positions[1].y() / triangle.positions[1].w()), |
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tcu::Vec2(triangle.positions[2].x() / triangle.positions[2].w(), triangle.positions[2].y() / triangle.positions[2].w()), |
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}; |
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const tcu::Vec2 triangleScreenSpace[3] = |
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{ |
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(triangleNormalizedDeviceSpace[0] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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(triangleNormalizedDeviceSpace[1] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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(triangleNormalizedDeviceSpace[2] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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}; |
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const bool pixelOnEdge0 = pixelNearLineSegment(pixel, triangleScreenSpace[0], triangleScreenSpace[1]); |
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const bool pixelOnEdge1 = pixelNearLineSegment(pixel, triangleScreenSpace[1], triangleScreenSpace[2]); |
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const bool pixelOnEdge2 = pixelNearLineSegment(pixel, triangleScreenSpace[2], triangleScreenSpace[0]); |
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// If the pixel is on a multiple edges return false |
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if (pixelOnEdge0 && !pixelOnEdge1 && !pixelOnEdge2) |
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return triangle.sharedEdge[0]; |
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if (!pixelOnEdge0 && pixelOnEdge1 && !pixelOnEdge2) |
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return triangle.sharedEdge[1]; |
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if (!pixelOnEdge0 && !pixelOnEdge1 && pixelOnEdge2) |
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return triangle.sharedEdge[2]; |
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} |
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return false; |
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} |
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float triangleArea (const tcu::Vec2& s0, const tcu::Vec2& s1, const tcu::Vec2& s2) |
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{ |
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const tcu::Vec2 u (s1.x() - s0.x(), s1.y() - s0.y()); |
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const tcu::Vec2 v (s2.x() - s0.x(), s2.y() - s0.y()); |
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const float crossProduct = (u.x() * v.y() - u.y() * v.x()); |
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return crossProduct / 2.0f; |
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} |
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tcu::IVec4 getTriangleAABB (const TriangleSceneSpec::SceneTriangle& triangle, const tcu::IVec2& viewportSize) |
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{ |
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const tcu::Vec2 normalizedDeviceSpace[3] = |
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{ |
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tcu::Vec2(triangle.positions[0].x() / triangle.positions[0].w(), triangle.positions[0].y() / triangle.positions[0].w()), |
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tcu::Vec2(triangle.positions[1].x() / triangle.positions[1].w(), triangle.positions[1].y() / triangle.positions[1].w()), |
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tcu::Vec2(triangle.positions[2].x() / triangle.positions[2].w(), triangle.positions[2].y() / triangle.positions[2].w()), |
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}; |
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const tcu::Vec2 screenSpace[3] = |
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{ |
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(normalizedDeviceSpace[0] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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(normalizedDeviceSpace[1] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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(normalizedDeviceSpace[2] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
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}; |
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tcu::IVec4 aabb; |
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aabb.x() = (int)deFloatFloor(de::min(de::min(screenSpace[0].x(), screenSpace[1].x()), screenSpace[2].x())); |
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aabb.y() = (int)deFloatFloor(de::min(de::min(screenSpace[0].y(), screenSpace[1].y()), screenSpace[2].y())); |
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aabb.z() = (int)deFloatCeil (de::max(de::max(screenSpace[0].x(), screenSpace[1].x()), screenSpace[2].x())); |
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aabb.w() = (int)deFloatCeil (de::max(de::max(screenSpace[0].y(), screenSpace[1].y()), screenSpace[2].y())); |
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return aabb; |
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} |
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float getExponentEpsilonFromULP (int valueExponent, deUint32 ulp) |
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{ |
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DE_ASSERT(ulp < (1u<<10)); |
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// assume mediump precision, using ulp as ulps in a 10 bit mantissa |
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return tcu::Float32::construct(+1, valueExponent, (1u<<23) + (ulp << (23 - 10))).asFloat() - tcu::Float32::construct(+1, valueExponent, (1u<<23)).asFloat(); |
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} |
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float getValueEpsilonFromULP (float value, deUint32 ulp) |
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{ |
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DE_ASSERT(value != std::numeric_limits<float>::infinity() && value != -std::numeric_limits<float>::infinity()); |
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const int exponent = tcu::Float32(value).exponent(); |
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return getExponentEpsilonFromULP(exponent, ulp); |
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} |
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float getMaxValueWithinError (float value, deUint32 ulp) |
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{ |
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if (value == std::numeric_limits<float>::infinity() || value == -std::numeric_limits<float>::infinity()) |
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return value; |
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return value + getValueEpsilonFromULP(value, ulp); |
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} |
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float getMinValueWithinError (float value, deUint32 ulp) |
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{ |
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if (value == std::numeric_limits<float>::infinity() || value == -std::numeric_limits<float>::infinity()) |
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return value; |
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return value - getValueEpsilonFromULP(value, ulp); |
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} |
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float getMinFlushToZero (float value) |
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{ |
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// flush to zero if that decreases the value |
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// assume mediump precision |
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if (value > 0.0f && value < tcu::Float32::construct(+1, -14, 1u<<23).asFloat()) |
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return 0.0f; |
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return value; |
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} |
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float getMaxFlushToZero (float value) |
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{ |
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// flush to zero if that increases the value |
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// assume mediump precision |
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if (value < 0.0f && value > tcu::Float32::construct(-1, -14, 1u<<23).asFloat()) |
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return 0.0f; |
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return value; |
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} |
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tcu::IVec3 convertRGB8ToNativeFormat (const tcu::RGBA& color, const RasterizationArguments& args) |
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{ |
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tcu::IVec3 pixelNativeColor; |
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for (int channelNdx = 0; channelNdx < 3; ++channelNdx) |
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{ |
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const int channelBitCount = (channelNdx == 0) ? (args.redBits) : (channelNdx == 1) ? (args.greenBits) : (args.blueBits); |
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const int channelPixelValue = (channelNdx == 0) ? (color.getRed()) : (channelNdx == 1) ? (color.getGreen()) : (color.getBlue()); |
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if (channelBitCount <= 8) |
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pixelNativeColor[channelNdx] = channelPixelValue >> (8 - channelBitCount); |
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else if (channelBitCount == 8) |
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pixelNativeColor[channelNdx] = channelPixelValue; |
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else |
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{ |
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// just in case someone comes up with 8+ bits framebuffers pixel formats. But as |
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// we can only read in rgba8, we have to guess the trailing bits. Guessing 0. |
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pixelNativeColor[channelNdx] = channelPixelValue << (channelBitCount - 8); |
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} |
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} |
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return pixelNativeColor; |
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} |
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/*--------------------------------------------------------------------*//*! |
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* Returns the maximum value of x / y, where x c [minDividend, maxDividend] |
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* and y c [minDivisor, maxDivisor] |
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*//*--------------------------------------------------------------------*/ |
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float maximalRangeDivision (float minDividend, float maxDividend, float minDivisor, float maxDivisor) |
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{ |
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DE_ASSERT(minDividend <= maxDividend); |
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DE_ASSERT(minDivisor <= maxDivisor); |
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// special cases |
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if (minDividend == 0.0f && maxDividend == 0.0f) |
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return 0.0f; |
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if (minDivisor <= 0.0f && maxDivisor >= 0.0f) |
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return std::numeric_limits<float>::infinity(); |
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return de::max(de::max(minDividend / minDivisor, minDividend / maxDivisor), de::max(maxDividend / minDivisor, maxDividend / maxDivisor)); |
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} |
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/*--------------------------------------------------------------------*//*! |
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* Returns the minimum value of x / y, where x c [minDividend, maxDividend] |
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* and y c [minDivisor, maxDivisor] |
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*//*--------------------------------------------------------------------*/ |
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float minimalRangeDivision (float minDividend, float maxDividend, float minDivisor, float maxDivisor) |
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{ |
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DE_ASSERT(minDividend <= maxDividend); |
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DE_ASSERT(minDivisor <= maxDivisor); |
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// special cases |
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if (minDividend == 0.0f && maxDividend == 0.0f) |
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return 0.0f; |
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if (minDivisor <= 0.0f && maxDivisor >= 0.0f) |
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return -std::numeric_limits<float>::infinity(); |
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return de::min(de::min(minDividend / minDivisor, minDividend / maxDivisor), de::min(maxDividend / minDivisor, maxDividend / maxDivisor)); |
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} |
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static bool isLineXMajor (const tcu::Vec2& lineScreenSpaceP0, const tcu::Vec2& lineScreenSpaceP1) |
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{ |
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return de::abs(lineScreenSpaceP1.x() - lineScreenSpaceP0.x()) >= de::abs(lineScreenSpaceP1.y() - lineScreenSpaceP0.y()); |
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} |
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static bool isPackedSSLineXMajor (const tcu::Vec4& packedLine) |
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{ |
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const tcu::Vec2 lineScreenSpaceP0 = packedLine.swizzle(0, 1); |
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const tcu::Vec2 lineScreenSpaceP1 = packedLine.swizzle(2, 3); |
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return isLineXMajor(lineScreenSpaceP0, lineScreenSpaceP1); |
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} |
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struct InterpolationRange |
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{ |
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tcu::Vec3 max; |
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tcu::Vec3 min; |
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}; |
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struct LineInterpolationRange |
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{ |
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tcu::Vec2 max; |
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tcu::Vec2 min; |
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}; |
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InterpolationRange calcTriangleInterpolationWeights (const tcu::Vec4& p0, const tcu::Vec4& p1, const tcu::Vec4& p2, const tcu::Vec2& ndpixel) |
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{ |
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const int roundError = 1; |
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const int barycentricError = 3; |
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const int divError = 8; |
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const tcu::Vec2 nd0 = p0.swizzle(0, 1) / p0.w(); |
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const tcu::Vec2 nd1 = p1.swizzle(0, 1) / p1.w(); |
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const tcu::Vec2 nd2 = p2.swizzle(0, 1) / p2.w(); |
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const float ka = triangleArea(ndpixel, nd1, nd2); |
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const float kb = triangleArea(ndpixel, nd2, nd0); |
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const float kc = triangleArea(ndpixel, nd0, nd1); |
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const float kaMax = getMaxFlushToZero(getMaxValueWithinError(ka, barycentricError)); |
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const float kbMax = getMaxFlushToZero(getMaxValueWithinError(kb, barycentricError)); |
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const float kcMax = getMaxFlushToZero(getMaxValueWithinError(kc, barycentricError)); |
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const float kaMin = getMinFlushToZero(getMinValueWithinError(ka, barycentricError)); |
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const float kbMin = getMinFlushToZero(getMinValueWithinError(kb, barycentricError)); |
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const float kcMin = getMinFlushToZero(getMinValueWithinError(kc, barycentricError)); |
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DE_ASSERT(kaMin <= kaMax); |
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DE_ASSERT(kbMin <= kbMax); |
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DE_ASSERT(kcMin <= kcMax); |
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// calculate weights: vec3(ka / p0.w, kb / p1.w, kc / p2.w) / (ka / p0.w + kb / p1.w + kc / p2.w) |
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const float maxPreDivisionValues[3] = |
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{ |
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getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(kaMax / p0.w()), divError)), |
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getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(kbMax / p1.w()), divError)), |
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getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(kcMax / p2.w()), divError)), |
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}; |
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const float minPreDivisionValues[3] = |
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{ |
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getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(kaMin / p0.w()), divError)), |
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getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(kbMin / p1.w()), divError)), |
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getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(kcMin / p2.w()), divError)), |
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}; |
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DE_ASSERT(minPreDivisionValues[0] <= maxPreDivisionValues[0]); |
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DE_ASSERT(minPreDivisionValues[1] <= maxPreDivisionValues[1]); |
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DE_ASSERT(minPreDivisionValues[2] <= maxPreDivisionValues[2]); |
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const float maxDivisor = getMaxFlushToZero(getMaxValueWithinError(maxPreDivisionValues[0] + maxPreDivisionValues[1] + maxPreDivisionValues[2], 2*roundError)); |
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const float minDivisor = getMinFlushToZero(getMinValueWithinError(minPreDivisionValues[0] + minPreDivisionValues[1] + minPreDivisionValues[2], 2*roundError)); |
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DE_ASSERT(minDivisor <= maxDivisor); |
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InterpolationRange returnValue; |
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returnValue.max.x() = getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(maximalRangeDivision(minPreDivisionValues[0], maxPreDivisionValues[0], minDivisor, maxDivisor)), divError)); |
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returnValue.max.y() = getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(maximalRangeDivision(minPreDivisionValues[1], maxPreDivisionValues[1], minDivisor, maxDivisor)), divError)); |
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returnValue.max.z() = getMaxFlushToZero(getMaxValueWithinError(getMaxFlushToZero(maximalRangeDivision(minPreDivisionValues[2], maxPreDivisionValues[2], minDivisor, maxDivisor)), divError)); |
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returnValue.min.x() = getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(minimalRangeDivision(minPreDivisionValues[0], maxPreDivisionValues[0], minDivisor, maxDivisor)), divError)); |
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returnValue.min.y() = getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(minimalRangeDivision(minPreDivisionValues[1], maxPreDivisionValues[1], minDivisor, maxDivisor)), divError)); |
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returnValue.min.z() = getMinFlushToZero(getMinValueWithinError(getMinFlushToZero(minimalRangeDivision(minPreDivisionValues[2], maxPreDivisionValues[2], minDivisor, maxDivisor)), divError)); |
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DE_ASSERT(returnValue.min.x() <= returnValue.max.x()); |
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DE_ASSERT(returnValue.min.y() <= returnValue.max.y()); |
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DE_ASSERT(returnValue.min.z() <= returnValue.max.z()); |
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return returnValue; |
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} |
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LineInterpolationRange calcLineInterpolationWeights (const tcu::Vec2& pa, float wa, const tcu::Vec2& pb, float wb, const tcu::Vec2& pr) |
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{ |
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const int roundError = 1; |
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const int divError = 3; |
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// calc weights: |
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// (1-t) / wa t / wb |
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// ------------------- , ------------------- |
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// (1-t) / wa + t / wb (1-t) / wa + t / wb |
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// Allow 1 ULP |
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const float dividend = tcu::dot(pr - pa, pb - pa); |
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const float dividendMax = getMaxValueWithinError(dividend, 1); |
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const float dividendMin = getMinValueWithinError(dividend, 1); |
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DE_ASSERT(dividendMin <= dividendMax); |
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// Assuming lengthSquared will not be implemented as sqrt(x)^2, allow 1 ULP |
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const float divisor = tcu::lengthSquared(pb - pa); |
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const float divisorMax = getMaxValueWithinError(divisor, 1); |
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const float divisorMin = getMinValueWithinError(divisor, 1); |
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DE_ASSERT(divisorMin <= divisorMax); |
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// Allow 3 ULP precision for division |
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const float tMax = getMaxValueWithinError(maximalRangeDivision(dividendMin, dividendMax, divisorMin, divisorMax), divError); |
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const float tMin = getMinValueWithinError(minimalRangeDivision(dividendMin, dividendMax, divisorMin, divisorMax), divError); |
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DE_ASSERT(tMin <= tMax); |
|
|
|
const float perspectiveTMax = getMaxValueWithinError(maximalRangeDivision(tMin, tMax, wb, wb), divError); |
|
const float perspectiveTMin = getMinValueWithinError(minimalRangeDivision(tMin, tMax, wb, wb), divError); |
|
DE_ASSERT(perspectiveTMin <= perspectiveTMax); |
|
|
|
const float perspectiveInvTMax = getMaxValueWithinError(maximalRangeDivision((1.0f - tMax), (1.0f - tMin), wa, wa), divError); |
|
const float perspectiveInvTMin = getMinValueWithinError(minimalRangeDivision((1.0f - tMax), (1.0f - tMin), wa, wa), divError); |
|
DE_ASSERT(perspectiveInvTMin <= perspectiveInvTMax); |
|
|
|
const float perspectiveDivisorMax = getMaxValueWithinError(perspectiveTMax + perspectiveInvTMax, roundError); |
|
const float perspectiveDivisorMin = getMinValueWithinError(perspectiveTMin + perspectiveInvTMin, roundError); |
|
DE_ASSERT(perspectiveDivisorMin <= perspectiveDivisorMax); |
|
|
|
LineInterpolationRange returnValue; |
|
returnValue.max.x() = getMaxValueWithinError(maximalRangeDivision(perspectiveInvTMin, perspectiveInvTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.max.y() = getMaxValueWithinError(maximalRangeDivision(perspectiveTMin, perspectiveTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.min.x() = getMinValueWithinError(minimalRangeDivision(perspectiveInvTMin, perspectiveInvTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.min.y() = getMinValueWithinError(minimalRangeDivision(perspectiveTMin, perspectiveTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
|
|
DE_ASSERT(returnValue.min.x() <= returnValue.max.x()); |
|
DE_ASSERT(returnValue.min.y() <= returnValue.max.y()); |
|
|
|
return returnValue; |
|
} |
|
|
|
LineInterpolationRange calcLineInterpolationWeightsAxisProjected (const tcu::Vec2& pa, float wa, const tcu::Vec2& pb, float wb, const tcu::Vec2& pr) |
|
{ |
|
const int roundError = 1; |
|
const int divError = 3; |
|
const bool isXMajor = isLineXMajor(pa, pb); |
|
const int majorAxisNdx = (isXMajor) ? (0) : (1); |
|
|
|
// calc weights: |
|
// (1-t) / wa t / wb |
|
// ------------------- , ------------------- |
|
// (1-t) / wa + t / wb (1-t) / wa + t / wb |
|
|
|
// Use axis projected (inaccurate) method, i.e. for X-major lines: |
|
// (xd - xa) * (xb - xa) xd - xa |
|
// t = --------------------- == ------- |
|
// ( xb - xa ) ^ 2 xb - xa |
|
|
|
// Allow 1 ULP |
|
const float dividend = (pr[majorAxisNdx] - pa[majorAxisNdx]); |
|
const float dividendMax = getMaxValueWithinError(dividend, 1); |
|
const float dividendMin = getMinValueWithinError(dividend, 1); |
|
DE_ASSERT(dividendMin <= dividendMax); |
|
|
|
// Allow 1 ULP |
|
const float divisor = (pb[majorAxisNdx] - pa[majorAxisNdx]); |
|
const float divisorMax = getMaxValueWithinError(divisor, 1); |
|
const float divisorMin = getMinValueWithinError(divisor, 1); |
|
DE_ASSERT(divisorMin <= divisorMax); |
|
|
|
// Allow 3 ULP precision for division |
|
const float tMax = getMaxValueWithinError(maximalRangeDivision(dividendMin, dividendMax, divisorMin, divisorMax), divError); |
|
const float tMin = getMinValueWithinError(minimalRangeDivision(dividendMin, dividendMax, divisorMin, divisorMax), divError); |
|
DE_ASSERT(tMin <= tMax); |
|
|
|
const float perspectiveTMax = getMaxValueWithinError(maximalRangeDivision(tMin, tMax, wb, wb), divError); |
|
const float perspectiveTMin = getMinValueWithinError(minimalRangeDivision(tMin, tMax, wb, wb), divError); |
|
DE_ASSERT(perspectiveTMin <= perspectiveTMax); |
|
|
|
const float perspectiveInvTMax = getMaxValueWithinError(maximalRangeDivision((1.0f - tMax), (1.0f - tMin), wa, wa), divError); |
|
const float perspectiveInvTMin = getMinValueWithinError(minimalRangeDivision((1.0f - tMax), (1.0f - tMin), wa, wa), divError); |
|
DE_ASSERT(perspectiveInvTMin <= perspectiveInvTMax); |
|
|
|
const float perspectiveDivisorMax = getMaxValueWithinError(perspectiveTMax + perspectiveInvTMax, roundError); |
|
const float perspectiveDivisorMin = getMinValueWithinError(perspectiveTMin + perspectiveInvTMin, roundError); |
|
DE_ASSERT(perspectiveDivisorMin <= perspectiveDivisorMax); |
|
|
|
LineInterpolationRange returnValue; |
|
returnValue.max.x() = getMaxValueWithinError(maximalRangeDivision(perspectiveInvTMin, perspectiveInvTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.max.y() = getMaxValueWithinError(maximalRangeDivision(perspectiveTMin, perspectiveTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.min.x() = getMinValueWithinError(minimalRangeDivision(perspectiveInvTMin, perspectiveInvTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
returnValue.min.y() = getMinValueWithinError(minimalRangeDivision(perspectiveTMin, perspectiveTMax, perspectiveDivisorMin, perspectiveDivisorMax), divError); |
|
|
|
DE_ASSERT(returnValue.min.x() <= returnValue.max.x()); |
|
DE_ASSERT(returnValue.min.y() <= returnValue.max.y()); |
|
|
|
return returnValue; |
|
} |
|
|
|
template <typename WeightEquation> |
|
LineInterpolationRange calcSingleSampleLineInterpolationRangeWithWeightEquation (const tcu::Vec2& pa, |
|
float wa, |
|
const tcu::Vec2& pb, |
|
float wb, |
|
const tcu::IVec2& pixel, |
|
int subpixelBits, |
|
WeightEquation weightEquation) |
|
{ |
|
// allow interpolation weights anywhere in the central subpixels |
|
const float testSquareSize = (2.0f / (float)(1UL << subpixelBits)); |
|
const float testSquarePos = (0.5f - testSquareSize / 2); |
|
|
|
const tcu::Vec2 corners[4] = |
|
{ |
|
tcu::Vec2((float)pixel.x() + testSquarePos + 0.0f, (float)pixel.y() + testSquarePos + 0.0f), |
|
tcu::Vec2((float)pixel.x() + testSquarePos + 0.0f, (float)pixel.y() + testSquarePos + testSquareSize), |
|
tcu::Vec2((float)pixel.x() + testSquarePos + testSquareSize, (float)pixel.y() + testSquarePos + testSquareSize), |
|
tcu::Vec2((float)pixel.x() + testSquarePos + testSquareSize, (float)pixel.y() + testSquarePos + 0.0f), |
|
}; |
|
|
|
// calculate interpolation as a line |
|
const LineInterpolationRange weights[4] = |
|
{ |
|
weightEquation(pa, wa, pb, wb, corners[0]), |
|
weightEquation(pa, wa, pb, wb, corners[1]), |
|
weightEquation(pa, wa, pb, wb, corners[2]), |
|
weightEquation(pa, wa, pb, wb, corners[3]), |
|
}; |
|
|
|
const tcu::Vec2 minWeights = tcu::min(tcu::min(weights[0].min, weights[1].min), tcu::min(weights[2].min, weights[3].min)); |
|
const tcu::Vec2 maxWeights = tcu::max(tcu::max(weights[0].max, weights[1].max), tcu::max(weights[2].max, weights[3].max)); |
|
|
|
LineInterpolationRange result; |
|
result.min = minWeights; |
|
result.max = maxWeights; |
|
return result; |
|
} |
|
|
|
LineInterpolationRange calcSingleSampleLineInterpolationRange (const tcu::Vec2& pa, float wa, const tcu::Vec2& pb, float wb, const tcu::IVec2& pixel, int subpixelBits) |
|
{ |
|
return calcSingleSampleLineInterpolationRangeWithWeightEquation(pa, wa, pb, wb, pixel, subpixelBits, calcLineInterpolationWeights); |
|
} |
|
|
|
LineInterpolationRange calcSingleSampleLineInterpolationRangeAxisProjected (const tcu::Vec2& pa, float wa, const tcu::Vec2& pb, float wb, const tcu::IVec2& pixel, int subpixelBits) |
|
{ |
|
return calcSingleSampleLineInterpolationRangeWithWeightEquation(pa, wa, pb, wb, pixel, subpixelBits, calcLineInterpolationWeightsAxisProjected); |
|
} |
|
|
|
struct TriangleInterpolator |
|
{ |
|
const TriangleSceneSpec& scene; |
|
|
|
TriangleInterpolator (const TriangleSceneSpec& scene_) |
|
: scene(scene_) |
|
{ |
|
} |
|
|
|
InterpolationRange interpolate (int primitiveNdx, const tcu::IVec2 pixel, const tcu::IVec2 viewportSize, bool multisample, int subpixelBits) const |
|
{ |
|
// allow anywhere in the pixel area in multisample |
|
// allow only in the center subpixels (4 subpixels) in singlesample |
|
const float testSquareSize = (multisample) ? (1.0f) : (2.0f / (float)(1UL << subpixelBits)); |
|
const float testSquarePos = (multisample) ? (0.0f) : (0.5f - testSquareSize / 2); |
|
const tcu::Vec2 corners[4] = |
|
{ |
|
tcu::Vec2(((float)pixel.x() + testSquarePos + 0.0f) / (float)viewportSize.x() * 2.0f - 1.0f, ((float)pixel.y() + testSquarePos + 0.0f ) / (float)viewportSize.y() * 2.0f - 1.0f), |
|
tcu::Vec2(((float)pixel.x() + testSquarePos + 0.0f) / (float)viewportSize.x() * 2.0f - 1.0f, ((float)pixel.y() + testSquarePos + testSquareSize) / (float)viewportSize.y() * 2.0f - 1.0f), |
|
tcu::Vec2(((float)pixel.x() + testSquarePos + testSquareSize) / (float)viewportSize.x() * 2.0f - 1.0f, ((float)pixel.y() + testSquarePos + testSquareSize) / (float)viewportSize.y() * 2.0f - 1.0f), |
|
tcu::Vec2(((float)pixel.x() + testSquarePos + testSquareSize) / (float)viewportSize.x() * 2.0f - 1.0f, ((float)pixel.y() + testSquarePos + 0.0f ) / (float)viewportSize.y() * 2.0f - 1.0f), |
|
}; |
|
const InterpolationRange weights[4] = |
|
{ |
|
calcTriangleInterpolationWeights(scene.triangles[primitiveNdx].positions[0], scene.triangles[primitiveNdx].positions[1], scene.triangles[primitiveNdx].positions[2], corners[0]), |
|
calcTriangleInterpolationWeights(scene.triangles[primitiveNdx].positions[0], scene.triangles[primitiveNdx].positions[1], scene.triangles[primitiveNdx].positions[2], corners[1]), |
|
calcTriangleInterpolationWeights(scene.triangles[primitiveNdx].positions[0], scene.triangles[primitiveNdx].positions[1], scene.triangles[primitiveNdx].positions[2], corners[2]), |
|
calcTriangleInterpolationWeights(scene.triangles[primitiveNdx].positions[0], scene.triangles[primitiveNdx].positions[1], scene.triangles[primitiveNdx].positions[2], corners[3]), |
|
}; |
|
|
|
InterpolationRange result; |
|
result.min = tcu::min(tcu::min(weights[0].min, weights[1].min), tcu::min(weights[2].min, weights[3].min)); |
|
result.max = tcu::max(tcu::max(weights[0].max, weights[1].max), tcu::max(weights[2].max, weights[3].max)); |
|
return result; |
|
} |
|
}; |
|
|
|
/*--------------------------------------------------------------------*//*! |
|
* Used only by verifyMultisampleLineGroupInterpolation to calculate |
|
* correct line interpolations for the triangulated lines. |
|
*//*--------------------------------------------------------------------*/ |
|
struct MultisampleLineInterpolator |
|
{ |
|
const LineSceneSpec& scene; |
|
|
|
MultisampleLineInterpolator (const LineSceneSpec& scene_) |
|
: scene(scene_) |
|
{ |
|
} |
|
|
|
InterpolationRange interpolate (int primitiveNdx, const tcu::IVec2 pixel, const tcu::IVec2 viewportSize, bool multisample, int subpixelBits) const |
|
{ |
|
DE_UNREF(multisample); |
|
DE_UNREF(subpixelBits); |
|
|
|
// in triangulation, one line emits two triangles |
|
const int lineNdx = primitiveNdx / 2; |
|
|
|
// allow interpolation weights anywhere in the pixel |
|
const tcu::Vec2 corners[4] = |
|
{ |
|
tcu::Vec2((float)pixel.x() + 0.0f, (float)pixel.y() + 0.0f), |
|
tcu::Vec2((float)pixel.x() + 0.0f, (float)pixel.y() + 1.0f), |
|
tcu::Vec2((float)pixel.x() + 1.0f, (float)pixel.y() + 1.0f), |
|
tcu::Vec2((float)pixel.x() + 1.0f, (float)pixel.y() + 0.0f), |
|
}; |
|
|
|
const float wa = scene.lines[lineNdx].positions[0].w(); |
|
const float wb = scene.lines[lineNdx].positions[1].w(); |
|
const tcu::Vec2 pa = tcu::Vec2((scene.lines[lineNdx].positions[0].x() / wa + 1.0f) * 0.5f * (float)viewportSize.x(), |
|
(scene.lines[lineNdx].positions[0].y() / wa + 1.0f) * 0.5f * (float)viewportSize.y()); |
|
const tcu::Vec2 pb = tcu::Vec2((scene.lines[lineNdx].positions[1].x() / wb + 1.0f) * 0.5f * (float)viewportSize.x(), |
|
(scene.lines[lineNdx].positions[1].y() / wb + 1.0f) * 0.5f * (float)viewportSize.y()); |
|
|
|
// calculate interpolation as a line |
|
const LineInterpolationRange weights[4] = |
|
{ |
|
calcLineInterpolationWeights(pa, wa, pb, wb, corners[0]), |
|
calcLineInterpolationWeights(pa, wa, pb, wb, corners[1]), |
|
calcLineInterpolationWeights(pa, wa, pb, wb, corners[2]), |
|
calcLineInterpolationWeights(pa, wa, pb, wb, corners[3]), |
|
}; |
|
|
|
const tcu::Vec2 minWeights = tcu::min(tcu::min(weights[0].min, weights[1].min), tcu::min(weights[2].min, weights[3].min)); |
|
const tcu::Vec2 maxWeights = tcu::max(tcu::max(weights[0].max, weights[1].max), tcu::max(weights[2].max, weights[3].max)); |
|
|
|
// convert to three-component form. For all triangles, the vertex 0 is always emitted by the line starting point, and vertex 2 by the ending point |
|
InterpolationRange result; |
|
result.min = tcu::Vec3(minWeights.x(), 0.0f, minWeights.y()); |
|
result.max = tcu::Vec3(maxWeights.x(), 0.0f, maxWeights.y()); |
|
return result; |
|
} |
|
}; |
|
|
|
template <typename Interpolator> |
|
bool verifyTriangleGroupInterpolationWithInterpolator (const tcu::Surface& surface, const TriangleSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log, const Interpolator& interpolator) |
|
{ |
|
const tcu::RGBA invalidPixelColor = tcu::RGBA(255, 0, 0, 255); |
|
const bool multisampled = (args.numSamples != 0); |
|
const tcu::IVec2 viewportSize = tcu::IVec2(surface.getWidth(), surface.getHeight()); |
|
const int errorFloodThreshold = 4; |
|
int errorCount = 0; |
|
int invalidPixels = 0; |
|
int subPixelBits = args.subpixelBits; |
|
tcu::Surface errorMask (surface.getWidth(), surface.getHeight()); |
|
|
|
tcu::clear(errorMask.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f)); |
|
|
|
// log format |
|
|
|
log << tcu::TestLog::Message << "Verifying rasterization result. Native format is RGB" << args.redBits << args.greenBits << args.blueBits << tcu::TestLog::EndMessage; |
|
if (args.redBits > 8 || args.greenBits > 8 || args.blueBits > 8) |
|
log << tcu::TestLog::Message << "Warning! More than 8 bits in a color channel, this may produce false negatives." << tcu::TestLog::EndMessage; |
|
|
|
// subpixel bits in in a valid range? |
|
|
|
if (subPixelBits < 0) |
|
{ |
|
log << tcu::TestLog::Message << "Invalid subpixel count (" << subPixelBits << "), assuming 0" << tcu::TestLog::EndMessage; |
|
subPixelBits = 0; |
|
} |
|
else if (subPixelBits > 16) |
|
{ |
|
// At high subpixel bit counts we might overflow. Checking at lower bit count is ok, but is less strict |
|
log << tcu::TestLog::Message << "Subpixel count is greater than 16 (" << subPixelBits << "). Checking results using less strict 16 bit requirements. This may produce false positives." << tcu::TestLog::EndMessage; |
|
subPixelBits = 16; |
|
} |
|
|
|
// check pixels |
|
|
|
for (int y = 0; y < surface.getHeight(); ++y) |
|
for (int x = 0; x < surface.getWidth(); ++x) |
|
{ |
|
const tcu::RGBA color = surface.getPixel(x, y); |
|
bool stackBottomFound = false; |
|
int stackSize = 0; |
|
tcu::Vec4 colorStackMin; |
|
tcu::Vec4 colorStackMax; |
|
|
|
// Iterate triangle coverage front to back, find the stack of pontentially contributing fragments |
|
for (int triNdx = (int)scene.triangles.size() - 1; triNdx >= 0; --triNdx) |
|
{ |
|
const CoverageType coverage = calculateTriangleCoverage(scene.triangles[triNdx].positions[0], |
|
scene.triangles[triNdx].positions[1], |
|
scene.triangles[triNdx].positions[2], |
|
tcu::IVec2(x, y), |
|
viewportSize, |
|
subPixelBits, |
|
multisampled); |
|
|
|
if (coverage == COVERAGE_FULL || coverage == COVERAGE_PARTIAL) |
|
{ |
|
// potentially contributes to the result fragment's value |
|
const InterpolationRange weights = interpolator.interpolate(triNdx, tcu::IVec2(x, y), viewportSize, multisampled, subPixelBits); |
|
|
|
const tcu::Vec4 fragmentColorMax = de::clamp(weights.max.x(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[0] + |
|
de::clamp(weights.max.y(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[1] + |
|
de::clamp(weights.max.z(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[2]; |
|
const tcu::Vec4 fragmentColorMin = de::clamp(weights.min.x(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[0] + |
|
de::clamp(weights.min.y(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[1] + |
|
de::clamp(weights.min.z(), 0.0f, 1.0f) * scene.triangles[triNdx].colors[2]; |
|
|
|
if (stackSize++ == 0) |
|
{ |
|
// first triangle, set the values properly |
|
colorStackMin = fragmentColorMin; |
|
colorStackMax = fragmentColorMax; |
|
} |
|
else |
|
{ |
|
// contributing triangle |
|
colorStackMin = tcu::min(colorStackMin, fragmentColorMin); |
|
colorStackMax = tcu::max(colorStackMax, fragmentColorMax); |
|
} |
|
|
|
if (coverage == COVERAGE_FULL) |
|
{ |
|
// loop terminates, this is the bottommost fragment |
|
stackBottomFound = true; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
// Partial coverage == background may be visible |
|
if (stackSize != 0 && !stackBottomFound) |
|
{ |
|
stackSize++; |
|
colorStackMin = tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f); |
|
} |
|
|
|
// Is the result image color in the valid range. |
|
if (stackSize == 0) |
|
{ |
|
// No coverage, allow only background (black, value=0) |
|
const tcu::IVec3 pixelNativeColor = convertRGB8ToNativeFormat(color, args); |
|
const int threshold = 1; |
|
|
|
if (pixelNativeColor.x() > threshold || |
|
pixelNativeColor.y() > threshold || |
|
pixelNativeColor.z() > threshold) |
|
{ |
|
++errorCount; |
|
|
|
// don't fill the logs with too much data |
|
if (errorCount < errorFloodThreshold) |
|
{ |
|
log << tcu::TestLog::Message |
|
<< "Found an invalid pixel at (" << x << "," << y << ")\n" |
|
<< "\tPixel color:\t\t" << color << "\n" |
|
<< "\tExpected background color.\n" |
|
<< tcu::TestLog::EndMessage; |
|
} |
|
|
|
++invalidPixels; |
|
errorMask.setPixel(x, y, invalidPixelColor); |
|
} |
|
} |
|
else |
|
{ |
|
DE_ASSERT(stackSize); |
|
|
|
// Each additional step in the stack may cause conversion error of 1 bit due to undefined rounding direction |
|
const int thresholdRed = stackSize - 1; |
|
const int thresholdGreen = stackSize - 1; |
|
const int thresholdBlue = stackSize - 1; |
|
|
|
const tcu::Vec3 valueRangeMin = tcu::Vec3(colorStackMin.xyz()); |
|
const tcu::Vec3 valueRangeMax = tcu::Vec3(colorStackMax.xyz()); |
|
|
|
const tcu::IVec3 formatLimit ((1 << args.redBits) - 1, (1 << args.greenBits) - 1, (1 << args.blueBits) - 1); |
|
const tcu::Vec3 colorMinF (de::clamp(valueRangeMin.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueRangeMin.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueRangeMin.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::Vec3 colorMaxF (de::clamp(valueRangeMax.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueRangeMax.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueRangeMax.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::IVec3 colorMin ((int)deFloatFloor(colorMinF.x()), |
|
(int)deFloatFloor(colorMinF.y()), |
|
(int)deFloatFloor(colorMinF.z())); |
|
const tcu::IVec3 colorMax ((int)deFloatCeil (colorMaxF.x()), |
|
(int)deFloatCeil (colorMaxF.y()), |
|
(int)deFloatCeil (colorMaxF.z())); |
|
|
|
// Convert pixel color from rgba8 to the real pixel format. Usually rgba8 or 565 |
|
const tcu::IVec3 pixelNativeColor = convertRGB8ToNativeFormat(color, args); |
|
|
|
// Validity check |
|
if (pixelNativeColor.x() < colorMin.x() - thresholdRed || |
|
pixelNativeColor.y() < colorMin.y() - thresholdGreen || |
|
pixelNativeColor.z() < colorMin.z() - thresholdBlue || |
|
pixelNativeColor.x() > colorMax.x() + thresholdRed || |
|
pixelNativeColor.y() > colorMax.y() + thresholdGreen || |
|
pixelNativeColor.z() > colorMax.z() + thresholdBlue) |
|
{ |
|
++errorCount; |
|
|
|
// don't fill the logs with too much data |
|
if (errorCount <= errorFloodThreshold) |
|
{ |
|
log << tcu::TestLog::Message |
|
<< "Found an invalid pixel at (" << x << "," << y << ")\n" |
|
<< "\tPixel color:\t\t" << color << "\n" |
|
<< "\tNative color:\t\t" << pixelNativeColor << "\n" |
|
<< "\tAllowed error:\t\t" << tcu::IVec3(thresholdRed, thresholdGreen, thresholdBlue) << "\n" |
|
<< "\tReference native color min: " << tcu::clamp(colorMin - tcu::IVec3(thresholdRed, thresholdGreen, thresholdBlue), tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\tReference native color max: " << tcu::clamp(colorMax + tcu::IVec3(thresholdRed, thresholdGreen, thresholdBlue), tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\tReference native float min: " << tcu::clamp(colorMinF - tcu::IVec3(thresholdRed, thresholdGreen, thresholdBlue).cast<float>(), tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\tReference native float max: " << tcu::clamp(colorMaxF + tcu::IVec3(thresholdRed, thresholdGreen, thresholdBlue).cast<float>(), tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\tFmin:\t" << tcu::clamp(valueRangeMin, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n" |
|
<< "\tFmax:\t" << tcu::clamp(valueRangeMax, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n" |
|
<< tcu::TestLog::EndMessage; |
|
} |
|
|
|
++invalidPixels; |
|
errorMask.setPixel(x, y, invalidPixelColor); |
|
} |
|
} |
|
} |
|
|
|
// don't just hide failures |
|
if (errorCount > errorFloodThreshold) |
|
log << tcu::TestLog::Message << "Omitted " << (errorCount-errorFloodThreshold) << " pixel error description(s)." << tcu::TestLog::EndMessage; |
|
|
|
// report result |
|
if (invalidPixels) |
|
{ |
|
log << tcu::TestLog::Message << invalidPixels << " invalid pixel(s) found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::Image("ErrorMask", "ErrorMask", errorMask) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return false; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "No invalid pixels found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return true; |
|
} |
|
} |
|
|
|
|
|
float calculateIntersectionParameter (const tcu::Vec2 line[2], float w, int componentNdx) |
|
{ |
|
DE_ASSERT(componentNdx < 2); |
|
if (line[1][componentNdx] == line[0][componentNdx]) |
|
return -1.0f; |
|
|
|
return (w - line[0][componentNdx]) / (line[1][componentNdx] - line[0][componentNdx]); |
|
} |
|
|
|
// Clips the given line with a ((-w, -w), (-w, w), (w, w), (w, -w)) rectangle |
|
void applyClippingBox (tcu::Vec2 line[2], float w) |
|
{ |
|
for (int side = 0; side < 4; ++side) |
|
{ |
|
const int sign = ((side / 2) * -2) + 1; |
|
const int component = side % 2; |
|
const float t = calculateIntersectionParameter(line, w * (float)sign, component); |
|
|
|
if ((t > 0) && (t < 1)) |
|
{ |
|
const float newCoord = t * line[1][1 - component] + (1 - t) * line[0][1 - component]; |
|
|
|
if (line[1][component] > (w * (float)sign)) |
|
{ |
|
line[1 - side / 2][component] = w * (float)sign; |
|
line[1 - side / 2][1 - component] = newCoord; |
|
} |
|
else |
|
{ |
|
line[side / 2][component] = w * (float)sign; |
|
line[side / 2][1 - component] = newCoord; |
|
} |
|
} |
|
} |
|
} |
|
|
|
enum ClipMode |
|
{ |
|
CLIPMODE_NO_CLIPPING = 0, |
|
CLIPMODE_USE_CLIPPING_BOX, |
|
|
|
CLIPMODE_LAST |
|
}; |
|
|
|
bool verifyMultisampleLineGroupRasterization (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log, ClipMode clipMode, VerifyTriangleGroupRasterizationLogStash* logStash = DE_NULL) |
|
{ |
|
// Multisampled line == 2 triangles |
|
|
|
const tcu::Vec2 viewportSize = tcu::Vec2((float)surface.getWidth(), (float)surface.getHeight()); |
|
const float halfLineWidth = scene.lineWidth * 0.5f; |
|
TriangleSceneSpec triangleScene; |
|
|
|
triangleScene.triangles.resize(2 * scene.lines.size()); |
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
// Transform to screen space, add pixel offsets, convert back to normalized device space, and test as triangles |
|
tcu::Vec2 lineNormalizedDeviceSpace[2] = |
|
{ |
|
tcu::Vec2(scene.lines[lineNdx].positions[0].x() / scene.lines[lineNdx].positions[0].w(), scene.lines[lineNdx].positions[0].y() / scene.lines[lineNdx].positions[0].w()), |
|
tcu::Vec2(scene.lines[lineNdx].positions[1].x() / scene.lines[lineNdx].positions[1].w(), scene.lines[lineNdx].positions[1].y() / scene.lines[lineNdx].positions[1].w()), |
|
}; |
|
|
|
if (clipMode == CLIPMODE_USE_CLIPPING_BOX) |
|
{ |
|
applyClippingBox(lineNormalizedDeviceSpace, 1.0f); |
|
} |
|
|
|
const tcu::Vec2 lineScreenSpace[2] = |
|
{ |
|
(lineNormalizedDeviceSpace[0] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * viewportSize, |
|
(lineNormalizedDeviceSpace[1] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * viewportSize, |
|
}; |
|
|
|
const tcu::Vec2 lineDir = tcu::normalize(lineScreenSpace[1] - lineScreenSpace[0]); |
|
const tcu::Vec2 lineNormalDir = tcu::Vec2(lineDir.y(), -lineDir.x()); |
|
|
|
const tcu::Vec2 lineQuadScreenSpace[4] = |
|
{ |
|
lineScreenSpace[0] + lineNormalDir * halfLineWidth, |
|
lineScreenSpace[0] - lineNormalDir * halfLineWidth, |
|
lineScreenSpace[1] - lineNormalDir * halfLineWidth, |
|
lineScreenSpace[1] + lineNormalDir * halfLineWidth, |
|
}; |
|
const tcu::Vec2 lineQuadNormalizedDeviceSpace[4] = |
|
{ |
|
lineQuadScreenSpace[0] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[1] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[2] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[3] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
}; |
|
|
|
triangleScene.triangles[lineNdx*2 + 0].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 0].sharedEdge[0] = false; |
|
triangleScene.triangles[lineNdx*2 + 0].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[1].x(), lineQuadNormalizedDeviceSpace[1].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 0].sharedEdge[1] = false; |
|
triangleScene.triangles[lineNdx*2 + 0].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 0].sharedEdge[2] = true; |
|
|
|
triangleScene.triangles[lineNdx*2 + 1].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 1].sharedEdge[0] = true; |
|
triangleScene.triangles[lineNdx*2 + 1].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 1].sharedEdge[1] = false; |
|
triangleScene.triangles[lineNdx*2 + 1].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[3].x(), lineQuadNormalizedDeviceSpace[3].y(), 0.0f, 1.0f); triangleScene.triangles[lineNdx*2 + 1].sharedEdge[2] = false; |
|
} |
|
|
|
return verifyTriangleGroupRasterization(surface, triangleScene, args, log, VERIFICATIONMODE_STRICT, logStash); |
|
} |
|
|
|
bool verifyMultisampleLineGroupInterpolation (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
// Multisampled line == 2 triangles |
|
|
|
const tcu::Vec2 viewportSize = tcu::Vec2((float)surface.getWidth(), (float)surface.getHeight()); |
|
const float halfLineWidth = scene.lineWidth * 0.5f; |
|
TriangleSceneSpec triangleScene; |
|
|
|
triangleScene.triangles.resize(2 * scene.lines.size()); |
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
// Transform to screen space, add pixel offsets, convert back to normalized device space, and test as triangles |
|
const tcu::Vec2 lineNormalizedDeviceSpace[2] = |
|
{ |
|
tcu::Vec2(scene.lines[lineNdx].positions[0].x() / scene.lines[lineNdx].positions[0].w(), scene.lines[lineNdx].positions[0].y() / scene.lines[lineNdx].positions[0].w()), |
|
tcu::Vec2(scene.lines[lineNdx].positions[1].x() / scene.lines[lineNdx].positions[1].w(), scene.lines[lineNdx].positions[1].y() / scene.lines[lineNdx].positions[1].w()), |
|
}; |
|
const tcu::Vec2 lineScreenSpace[2] = |
|
{ |
|
(lineNormalizedDeviceSpace[0] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * viewportSize, |
|
(lineNormalizedDeviceSpace[1] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * viewportSize, |
|
}; |
|
|
|
const tcu::Vec2 lineDir = tcu::normalize(lineScreenSpace[1] - lineScreenSpace[0]); |
|
const tcu::Vec2 lineNormalDir = tcu::Vec2(lineDir.y(), -lineDir.x()); |
|
|
|
const tcu::Vec2 lineQuadScreenSpace[4] = |
|
{ |
|
lineScreenSpace[0] + lineNormalDir * halfLineWidth, |
|
lineScreenSpace[0] - lineNormalDir * halfLineWidth, |
|
lineScreenSpace[1] - lineNormalDir * halfLineWidth, |
|
lineScreenSpace[1] + lineNormalDir * halfLineWidth, |
|
}; |
|
const tcu::Vec2 lineQuadNormalizedDeviceSpace[4] = |
|
{ |
|
lineQuadScreenSpace[0] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[1] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[2] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
lineQuadScreenSpace[3] / viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
}; |
|
|
|
triangleScene.triangles[lineNdx*2 + 0].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); |
|
triangleScene.triangles[lineNdx*2 + 0].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[1].x(), lineQuadNormalizedDeviceSpace[1].y(), 0.0f, 1.0f); |
|
triangleScene.triangles[lineNdx*2 + 0].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); |
|
|
|
triangleScene.triangles[lineNdx*2 + 0].sharedEdge[0] = false; |
|
triangleScene.triangles[lineNdx*2 + 0].sharedEdge[1] = false; |
|
triangleScene.triangles[lineNdx*2 + 0].sharedEdge[2] = true; |
|
|
|
triangleScene.triangles[lineNdx*2 + 0].colors[0] = scene.lines[lineNdx].colors[0]; |
|
triangleScene.triangles[lineNdx*2 + 0].colors[1] = scene.lines[lineNdx].colors[0]; |
|
triangleScene.triangles[lineNdx*2 + 0].colors[2] = scene.lines[lineNdx].colors[1]; |
|
|
|
triangleScene.triangles[lineNdx*2 + 1].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); |
|
triangleScene.triangles[lineNdx*2 + 1].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); |
|
triangleScene.triangles[lineNdx*2 + 1].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[3].x(), lineQuadNormalizedDeviceSpace[3].y(), 0.0f, 1.0f); |
|
|
|
triangleScene.triangles[lineNdx*2 + 1].sharedEdge[0] = true; |
|
triangleScene.triangles[lineNdx*2 + 1].sharedEdge[1] = false; |
|
triangleScene.triangles[lineNdx*2 + 1].sharedEdge[2] = false; |
|
|
|
triangleScene.triangles[lineNdx*2 + 1].colors[0] = scene.lines[lineNdx].colors[0]; |
|
triangleScene.triangles[lineNdx*2 + 1].colors[1] = scene.lines[lineNdx].colors[1]; |
|
triangleScene.triangles[lineNdx*2 + 1].colors[2] = scene.lines[lineNdx].colors[1]; |
|
} |
|
|
|
return verifyTriangleGroupInterpolationWithInterpolator(surface, triangleScene, args, log, MultisampleLineInterpolator(scene)); |
|
} |
|
|
|
bool verifyMultisamplePointGroupRasterization (const tcu::Surface& surface, const PointSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
// Multisampled point == 2 triangles |
|
|
|
const tcu::Vec2 viewportSize = tcu::Vec2((float)surface.getWidth(), (float)surface.getHeight()); |
|
TriangleSceneSpec triangleScene; |
|
|
|
triangleScene.triangles.resize(2 * scene.points.size()); |
|
for (int pointNdx = 0; pointNdx < (int)scene.points.size(); ++pointNdx) |
|
{ |
|
// Transform to screen space, add pixel offsets, convert back to normalized device space, and test as triangles |
|
const tcu::Vec2 pointNormalizedDeviceSpace = tcu::Vec2(scene.points[pointNdx].position.x() / scene.points[pointNdx].position.w(), scene.points[pointNdx].position.y() / scene.points[pointNdx].position.w()); |
|
const tcu::Vec2 pointScreenSpace = (pointNormalizedDeviceSpace + tcu::Vec2(1.0f, 1.0f)) * 0.5f * viewportSize; |
|
const float offset = scene.points[pointNdx].pointSize * 0.5f; |
|
const tcu::Vec2 lineQuadNormalizedDeviceSpace[4] = |
|
{ |
|
(pointScreenSpace + tcu::Vec2(-offset, -offset))/ viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
(pointScreenSpace + tcu::Vec2(-offset, offset))/ viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
(pointScreenSpace + tcu::Vec2( offset, offset))/ viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
(pointScreenSpace + tcu::Vec2( offset, -offset))/ viewportSize * 2.0f - tcu::Vec2(1.0f, 1.0f), |
|
}; |
|
|
|
triangleScene.triangles[pointNdx*2 + 0].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 0].sharedEdge[0] = false; |
|
triangleScene.triangles[pointNdx*2 + 0].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[1].x(), lineQuadNormalizedDeviceSpace[1].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 0].sharedEdge[1] = false; |
|
triangleScene.triangles[pointNdx*2 + 0].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 0].sharedEdge[2] = true; |
|
|
|
triangleScene.triangles[pointNdx*2 + 1].positions[0] = tcu::Vec4(lineQuadNormalizedDeviceSpace[0].x(), lineQuadNormalizedDeviceSpace[0].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 1].sharedEdge[0] = true; |
|
triangleScene.triangles[pointNdx*2 + 1].positions[1] = tcu::Vec4(lineQuadNormalizedDeviceSpace[2].x(), lineQuadNormalizedDeviceSpace[2].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 1].sharedEdge[1] = false; |
|
triangleScene.triangles[pointNdx*2 + 1].positions[2] = tcu::Vec4(lineQuadNormalizedDeviceSpace[3].x(), lineQuadNormalizedDeviceSpace[3].y(), 0.0f, 1.0f); triangleScene.triangles[pointNdx*2 + 1].sharedEdge[2] = false; |
|
} |
|
|
|
return verifyTriangleGroupRasterization(surface, triangleScene, args, log); |
|
} |
|
|
|
void genScreenSpaceLines (std::vector<tcu::Vec4>& screenspaceLines, const std::vector<LineSceneSpec::SceneLine>& lines, const tcu::IVec2& viewportSize) |
|
{ |
|
DE_ASSERT(screenspaceLines.size() == lines.size()); |
|
|
|
for (int lineNdx = 0; lineNdx < (int)lines.size(); ++lineNdx) |
|
{ |
|
const tcu::Vec2 lineNormalizedDeviceSpace[2] = |
|
{ |
|
tcu::Vec2(lines[lineNdx].positions[0].x() / lines[lineNdx].positions[0].w(), lines[lineNdx].positions[0].y() / lines[lineNdx].positions[0].w()), |
|
tcu::Vec2(lines[lineNdx].positions[1].x() / lines[lineNdx].positions[1].w(), lines[lineNdx].positions[1].y() / lines[lineNdx].positions[1].w()), |
|
}; |
|
const tcu::Vec4 lineScreenSpace[2] = |
|
{ |
|
tcu::Vec4((lineNormalizedDeviceSpace[0].x() + 1.0f) * 0.5f * (float)viewportSize.x(), (lineNormalizedDeviceSpace[0].y() + 1.0f) * 0.5f * (float)viewportSize.y(), 0.0f, 1.0f), |
|
tcu::Vec4((lineNormalizedDeviceSpace[1].x() + 1.0f) * 0.5f * (float)viewportSize.x(), (lineNormalizedDeviceSpace[1].y() + 1.0f) * 0.5f * (float)viewportSize.y(), 0.0f, 1.0f), |
|
}; |
|
|
|
screenspaceLines[lineNdx] = tcu::Vec4(lineScreenSpace[0].x(), lineScreenSpace[0].y(), lineScreenSpace[1].x(), lineScreenSpace[1].y()); |
|
} |
|
} |
|
|
|
bool verifySinglesampleLineGroupRasterization (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
DE_ASSERT(deFloatFrac(scene.lineWidth) != 0.5f); // rounding direction is not defined, disallow undefined cases |
|
DE_ASSERT(scene.lines.size() < 255); // indices are stored as unsigned 8-bit ints |
|
|
|
bool allOK = true; |
|
bool overdrawInReference = false; |
|
int referenceFragments = 0; |
|
int resultFragments = 0; |
|
int lineWidth = deFloorFloatToInt32(scene.lineWidth + 0.5f); |
|
bool imageShown = false; |
|
std::vector<bool> lineIsXMajor (scene.lines.size()); |
|
std::vector<tcu::Vec4> screenspaceLines(scene.lines.size()); |
|
|
|
// Reference renderer produces correct fragments using the diamond-rule. Make 2D int array, each cell contains the highest index (first index = 1) of the overlapping lines or 0 if no line intersects the pixel |
|
tcu::TextureLevel referenceLineMap(tcu::TextureFormat(tcu::TextureFormat::R, tcu::TextureFormat::UNSIGNED_INT8), surface.getWidth(), surface.getHeight()); |
|
tcu::clear(referenceLineMap.getAccess(), tcu::IVec4(0, 0, 0, 0)); |
|
|
|
genScreenSpaceLines(screenspaceLines, scene.lines, tcu::IVec2(surface.getWidth(), surface.getHeight())); |
|
|
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
rr::SingleSampleLineRasterizer rasterizer(tcu::IVec4(0, 0, surface.getWidth(), surface.getHeight())); |
|
rasterizer.init(tcu::Vec4(screenspaceLines[lineNdx][0], |
|
screenspaceLines[lineNdx][1], |
|
0.0f, |
|
1.0f), |
|
tcu::Vec4(screenspaceLines[lineNdx][2], |
|
screenspaceLines[lineNdx][3], |
|
0.0f, |
|
1.0f), |
|
scene.lineWidth); |
|
|
|
// calculate majority of later use |
|
lineIsXMajor[lineNdx] = isPackedSSLineXMajor(screenspaceLines[lineNdx]); |
|
|
|
for (;;) |
|
{ |
|
const int maxPackets = 32; |
|
int numRasterized = 0; |
|
rr::FragmentPacket packets[maxPackets]; |
|
|
|
rasterizer.rasterize(packets, DE_NULL, maxPackets, numRasterized); |
|
|
|
for (int packetNdx = 0; packetNdx < numRasterized; ++packetNdx) |
|
{ |
|
for (int fragNdx = 0; fragNdx < 4; ++fragNdx) |
|
{ |
|
if ((deUint32)packets[packetNdx].coverage & (1 << fragNdx)) |
|
{ |
|
const tcu::IVec2 fragPos = packets[packetNdx].position + tcu::IVec2(fragNdx%2, fragNdx/2); |
|
|
|
// Check for overdraw |
|
if (!overdrawInReference) |
|
overdrawInReference = referenceLineMap.getAccess().getPixelInt(fragPos.x(), fragPos.y()).x() != 0; |
|
|
|
// Output pixel |
|
referenceLineMap.getAccess().setPixel(tcu::IVec4(lineNdx + 1, 0, 0, 0), fragPos.x(), fragPos.y()); |
|
} |
|
} |
|
} |
|
|
|
if (numRasterized != maxPackets) |
|
break; |
|
} |
|
} |
|
|
|
// Requirement 1: The coordinates of a fragment produced by the algorithm may not deviate by more than one unit |
|
{ |
|
tcu::Surface errorMask (surface.getWidth(), surface.getHeight()); |
|
bool missingFragments = false; |
|
|
|
tcu::clear(errorMask.getAccess(), tcu::IVec4(0, 255, 0, 255)); |
|
|
|
log << tcu::TestLog::Message << "Searching for deviating fragments." << tcu::TestLog::EndMessage; |
|
|
|
for (int y = 0; y < referenceLineMap.getHeight(); ++y) |
|
for (int x = 0; x < referenceLineMap.getWidth(); ++x) |
|
{ |
|
const bool reference = referenceLineMap.getAccess().getPixelInt(x, y).x() != 0; |
|
const bool result = compareColors(surface.getPixel(x, y), tcu::RGBA::white(), args.redBits, args.greenBits, args.blueBits); |
|
|
|
if (reference) |
|
++referenceFragments; |
|
if (result) |
|
++resultFragments; |
|
|
|
if (reference == result) |
|
continue; |
|
|
|
// Reference fragment here, matching result fragment must be nearby |
|
if (reference && !result) |
|
{ |
|
bool foundFragment = false; |
|
|
|
if (x == 0 || y == 0 || x == referenceLineMap.getWidth() - 1 || y == referenceLineMap.getHeight() -1) |
|
{ |
|
// image boundary, missing fragment could be over the image edge |
|
foundFragment = true; |
|
} |
|
|
|
// find nearby fragment |
|
for (int dy = -1; dy < 2 && !foundFragment; ++dy) |
|
for (int dx = -1; dx < 2 && !foundFragment; ++dx) |
|
{ |
|
if (compareColors(surface.getPixel(x+dx, y+dy), tcu::RGBA::white(), args.redBits, args.greenBits, args.blueBits)) |
|
foundFragment = true; |
|
} |
|
|
|
if (!foundFragment) |
|
{ |
|
missingFragments = true; |
|
errorMask.setPixel(x, y, tcu::RGBA::red()); |
|
} |
|
} |
|
} |
|
|
|
if (missingFragments) |
|
{ |
|
log << tcu::TestLog::Message << "Invalid deviation(s) found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::Image("ErrorMask", "ErrorMask", errorMask) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
imageShown = true; |
|
allOK = false; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "No invalid deviations found." << tcu::TestLog::EndMessage; |
|
} |
|
} |
|
|
|
// Requirement 2: The total number of fragments produced by the algorithm may differ from |
|
// that produced by the diamond-exit rule by no more than one. |
|
{ |
|
// Check is not valid if the primitives intersect or otherwise share same fragments |
|
if (!overdrawInReference) |
|
{ |
|
int allowedDeviation = (int)scene.lines.size() * lineWidth; // one pixel per primitive in the major direction |
|
|
|
log << tcu::TestLog::Message << "Verifying fragment counts:\n" |
|
<< "\tDiamond-exit rule: " << referenceFragments << " fragments.\n" |
|
<< "\tResult image: " << resultFragments << " fragments.\n" |
|
<< "\tAllowing deviation of " << allowedDeviation << " fragments.\n" |
|
<< tcu::TestLog::EndMessage; |
|
|
|
if (deAbs32(referenceFragments - resultFragments) > allowedDeviation) |
|
{ |
|
tcu::Surface reference(surface.getWidth(), surface.getHeight()); |
|
|
|
// show a helpful reference image |
|
tcu::clear(reference.getAccess(), tcu::IVec4(0, 0, 0, 255)); |
|
for (int y = 0; y < surface.getHeight(); ++y) |
|
for (int x = 0; x < surface.getWidth(); ++x) |
|
if (referenceLineMap.getAccess().getPixelInt(x, y).x()) |
|
reference.setPixel(x, y, tcu::RGBA::white()); |
|
|
|
log << tcu::TestLog::Message << "Invalid fragment count in result image." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Reference", "Reference", reference) |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
allOK = false; |
|
imageShown = true; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "Fragment count is valid." << tcu::TestLog::EndMessage; |
|
} |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "Overdraw in scene. Fragment count cannot be verified. Skipping fragment count checks." << tcu::TestLog::EndMessage; |
|
} |
|
} |
|
|
|
// Requirement 3: Line width must be constant |
|
{ |
|
bool invalidWidthFound = false; |
|
|
|
log << tcu::TestLog::Message << "Verifying line widths of the x-major lines." << tcu::TestLog::EndMessage; |
|
for (int y = 1; y < referenceLineMap.getHeight() - 1; ++y) |
|
{ |
|
bool fullyVisibleLine = false; |
|
bool previousPixelUndefined = false; |
|
int currentLine = 0; |
|
int currentWidth = 1; |
|
|
|
for (int x = 1; x < referenceLineMap.getWidth() - 1; ++x) |
|
{ |
|
const bool result = compareColors(surface.getPixel(x, y), tcu::RGBA::white(), args.redBits, args.greenBits, args.blueBits); |
|
int lineID = 0; |
|
|
|
// Which line does this fragment belong to? |
|
|
|
if (result) |
|
{ |
|
bool multipleNearbyLines = false; |
|
|
|
for (int dy = -1; dy < 2; ++dy) |
|
for (int dx = -1; dx < 2; ++dx) |
|
{ |
|
const int nearbyID = referenceLineMap.getAccess().getPixelInt(x+dx, y+dy).x(); |
|
if (nearbyID) |
|
{ |
|
if (lineID && lineID != nearbyID) |
|
multipleNearbyLines = true; |
|
lineID = nearbyID; |
|
} |
|
} |
|
|
|
if (multipleNearbyLines) |
|
{ |
|
// Another line is too close, don't try to calculate width here |
|
previousPixelUndefined = true; |
|
continue; |
|
} |
|
} |
|
|
|
// Only line with id of lineID is nearby |
|
|
|
if (previousPixelUndefined) |
|
{ |
|
// The line might have been overdrawn or not |
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = false; |
|
previousPixelUndefined = false; |
|
} |
|
else if (lineID == currentLine) |
|
{ |
|
// Current line continues |
|
++currentWidth; |
|
} |
|
else if (lineID > currentLine) |
|
{ |
|
// Another line was drawn over or the line ends |
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = true; |
|
} |
|
else |
|
{ |
|
// The line ends |
|
if (fullyVisibleLine && !lineIsXMajor[currentLine-1]) |
|
{ |
|
// check width |
|
if (currentWidth != lineWidth) |
|
{ |
|
log << tcu::TestLog::Message << "\tInvalid line width at (" << x - currentWidth << ", " << y << ") - (" << x - 1 << ", " << y << "). Detected width of " << currentWidth << ", expected " << lineWidth << tcu::TestLog::EndMessage; |
|
invalidWidthFound = true; |
|
} |
|
} |
|
|
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = false; |
|
} |
|
} |
|
} |
|
|
|
log << tcu::TestLog::Message << "Verifying line widths of the y-major lines." << tcu::TestLog::EndMessage; |
|
for (int x = 1; x < referenceLineMap.getWidth() - 1; ++x) |
|
{ |
|
bool fullyVisibleLine = false; |
|
bool previousPixelUndefined = false; |
|
int currentLine = 0; |
|
int currentWidth = 1; |
|
|
|
for (int y = 1; y < referenceLineMap.getHeight() - 1; ++y) |
|
{ |
|
const bool result = compareColors(surface.getPixel(x, y), tcu::RGBA::white(), args.redBits, args.greenBits, args.blueBits); |
|
int lineID = 0; |
|
|
|
// Which line does this fragment belong to? |
|
|
|
if (result) |
|
{ |
|
bool multipleNearbyLines = false; |
|
|
|
for (int dy = -1; dy < 2; ++dy) |
|
for (int dx = -1; dx < 2; ++dx) |
|
{ |
|
const int nearbyID = referenceLineMap.getAccess().getPixelInt(x+dx, y+dy).x(); |
|
if (nearbyID) |
|
{ |
|
if (lineID && lineID != nearbyID) |
|
multipleNearbyLines = true; |
|
lineID = nearbyID; |
|
} |
|
} |
|
|
|
if (multipleNearbyLines) |
|
{ |
|
// Another line is too close, don't try to calculate width here |
|
previousPixelUndefined = true; |
|
continue; |
|
} |
|
} |
|
|
|
// Only line with id of lineID is nearby |
|
|
|
if (previousPixelUndefined) |
|
{ |
|
// The line might have been overdrawn or not |
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = false; |
|
previousPixelUndefined = false; |
|
} |
|
else if (lineID == currentLine) |
|
{ |
|
// Current line continues |
|
++currentWidth; |
|
} |
|
else if (lineID > currentLine) |
|
{ |
|
// Another line was drawn over or the line ends |
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = true; |
|
} |
|
else |
|
{ |
|
// The line ends |
|
if (fullyVisibleLine && lineIsXMajor[currentLine-1]) |
|
{ |
|
// check width |
|
if (currentWidth != lineWidth) |
|
{ |
|
log << tcu::TestLog::Message << "\tInvalid line width at (" << x << ", " << y - currentWidth << ") - (" << x << ", " << y - 1 << "). Detected width of " << currentWidth << ", expected " << lineWidth << tcu::TestLog::EndMessage; |
|
invalidWidthFound = true; |
|
} |
|
} |
|
|
|
currentLine = lineID; |
|
currentWidth = 1; |
|
fullyVisibleLine = false; |
|
} |
|
} |
|
} |
|
|
|
if (invalidWidthFound) |
|
{ |
|
log << tcu::TestLog::Message << "Invalid line width found, image is not valid." << tcu::TestLog::EndMessage; |
|
allOK = false; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "Line widths are valid." << tcu::TestLog::EndMessage; |
|
} |
|
} |
|
|
|
//\todo [2013-10-24 jarkko]. |
|
//Requirement 4. If two line segments share a common endpoint, and both segments are either |
|
//x-major (both left-to-right or both right-to-left) or y-major (both bottom-totop |
|
//or both top-to-bottom), then rasterizing both segments may not produce |
|
//duplicate fragments, nor may any fragments be omitted so as to interrupt |
|
//continuity of the connected segments. |
|
|
|
if (!imageShown) |
|
{ |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
} |
|
|
|
return allOK; |
|
} |
|
|
|
struct SingleSampleNarrowLineCandidate |
|
{ |
|
int lineNdx; |
|
tcu::IVec3 colorMin; |
|
tcu::IVec3 colorMax; |
|
tcu::Vec3 colorMinF; |
|
tcu::Vec3 colorMaxF; |
|
tcu::Vec3 valueRangeMin; |
|
tcu::Vec3 valueRangeMax; |
|
}; |
|
|
|
void setMaskMapCoverageBitForLine (int bitNdx, const tcu::Vec2& screenSpaceP0, const tcu::Vec2& screenSpaceP1, float lineWidth, tcu::PixelBufferAccess maskMap) |
|
{ |
|
enum |
|
{ |
|
MAX_PACKETS = 32, |
|
}; |
|
|
|
rr::SingleSampleLineRasterizer rasterizer (tcu::IVec4(0, 0, maskMap.getWidth(), maskMap.getHeight())); |
|
int numRasterized = MAX_PACKETS; |
|
rr::FragmentPacket packets[MAX_PACKETS]; |
|
|
|
rasterizer.init(tcu::Vec4(screenSpaceP0.x(), screenSpaceP0.y(), 0.0f, 1.0f), |
|
tcu::Vec4(screenSpaceP1.x(), screenSpaceP1.y(), 0.0f, 1.0f), |
|
lineWidth); |
|
|
|
while (numRasterized == MAX_PACKETS) |
|
{ |
|
rasterizer.rasterize(packets, DE_NULL, MAX_PACKETS, numRasterized); |
|
|
|
for (int packetNdx = 0; packetNdx < numRasterized; ++packetNdx) |
|
{ |
|
for (int fragNdx = 0; fragNdx < 4; ++fragNdx) |
|
{ |
|
if ((deUint32)packets[packetNdx].coverage & (1 << fragNdx)) |
|
{ |
|
const tcu::IVec2 fragPos = packets[packetNdx].position + tcu::IVec2(fragNdx%2, fragNdx/2); |
|
|
|
DE_ASSERT(deInBounds32(fragPos.x(), 0, maskMap.getWidth())); |
|
DE_ASSERT(deInBounds32(fragPos.y(), 0, maskMap.getHeight())); |
|
|
|
const deUint32 previousMask = maskMap.getPixelUint(fragPos.x(), fragPos.y()).x(); |
|
const deUint32 newMask = (previousMask) | ((deUint32)1u << bitNdx); |
|
|
|
maskMap.setPixel(tcu::UVec4(newMask, 0, 0, 0), fragPos.x(), fragPos.y()); |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
void setMaskMapCoverageBitForLines (const std::vector<tcu::Vec4>& screenspaceLines, float lineWidth, tcu::PixelBufferAccess maskMap) |
|
{ |
|
for (int lineNdx = 0; lineNdx < (int)screenspaceLines.size(); ++lineNdx) |
|
{ |
|
const tcu::Vec2 pa = screenspaceLines[lineNdx].swizzle(0, 1); |
|
const tcu::Vec2 pb = screenspaceLines[lineNdx].swizzle(2, 3); |
|
|
|
setMaskMapCoverageBitForLine(lineNdx, pa, pb, lineWidth, maskMap); |
|
} |
|
} |
|
|
|
// verify line interpolation assuming line pixels are interpolated independently depending only on screen space location |
|
bool verifyLineGroupPixelIndependentInterpolation (const tcu::Surface& surface, |
|
const LineSceneSpec& scene, |
|
const RasterizationArguments& args, |
|
tcu::TestLog& log, |
|
LineInterpolationMethod interpolationMethod) |
|
{ |
|
DE_ASSERT(scene.lines.size() < 8); // coverage indices are stored as bitmask in a unsigned 8-bit ints |
|
DE_ASSERT(interpolationMethod == LINEINTERPOLATION_STRICTLY_CORRECT || interpolationMethod == LINEINTERPOLATION_PROJECTED); |
|
|
|
const tcu::RGBA invalidPixelColor = tcu::RGBA(255, 0, 0, 255); |
|
const tcu::IVec2 viewportSize = tcu::IVec2(surface.getWidth(), surface.getHeight()); |
|
const int errorFloodThreshold = 4; |
|
int errorCount = 0; |
|
tcu::Surface errorMask (surface.getWidth(), surface.getHeight()); |
|
int invalidPixels = 0; |
|
std::vector<tcu::Vec4> screenspaceLines (scene.lines.size()); //!< packed (x0, y0, x1, y1) |
|
|
|
// Reference renderer produces correct fragments using the diamond-exit-rule. Make 2D int array, store line coverage as a 8-bit bitfield |
|
// The map is used to find lines with potential coverage to a given pixel |
|
tcu::TextureLevel referenceLineMap (tcu::TextureFormat(tcu::TextureFormat::R, tcu::TextureFormat::UNSIGNED_INT8), surface.getWidth(), surface.getHeight()); |
|
|
|
tcu::clear(referenceLineMap.getAccess(), tcu::IVec4(0, 0, 0, 0)); |
|
tcu::clear(errorMask.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f)); |
|
|
|
// log format |
|
|
|
log << tcu::TestLog::Message << "Verifying rasterization result. Native format is RGB" << args.redBits << args.greenBits << args.blueBits << tcu::TestLog::EndMessage; |
|
if (args.redBits > 8 || args.greenBits > 8 || args.blueBits > 8) |
|
log << tcu::TestLog::Message << "Warning! More than 8 bits in a color channel, this may produce false negatives." << tcu::TestLog::EndMessage; |
|
|
|
// prepare lookup map |
|
|
|
genScreenSpaceLines(screenspaceLines, scene.lines, viewportSize); |
|
setMaskMapCoverageBitForLines(screenspaceLines, scene.lineWidth, referenceLineMap.getAccess()); |
|
|
|
// Find all possible lines with coverage, check pixel color matches one of them |
|
|
|
for (int y = 1; y < surface.getHeight() - 1; ++y) |
|
for (int x = 1; x < surface.getWidth() - 1; ++x) |
|
{ |
|
const tcu::RGBA color = surface.getPixel(x, y); |
|
const tcu::IVec3 pixelNativeColor = convertRGB8ToNativeFormat(color, args); // Convert pixel color from rgba8 to the real pixel format. Usually rgba8 or 565 |
|
int lineCoverageSet = 0; // !< lines that may cover this fragment |
|
int lineSurroundingCoverage = 0xFFFF; // !< lines that will cover this fragment |
|
bool matchFound = false; |
|
const tcu::IVec3 formatLimit ((1 << args.redBits) - 1, (1 << args.greenBits) - 1, (1 << args.blueBits) - 1); |
|
|
|
std::vector<SingleSampleNarrowLineCandidate> candidates; |
|
|
|
// Find lines with possible coverage |
|
|
|
for (int dy = -1; dy < 2; ++dy) |
|
for (int dx = -1; dx < 2; ++dx) |
|
{ |
|
const int coverage = referenceLineMap.getAccess().getPixelInt(x+dx, y+dy).x(); |
|
|
|
lineCoverageSet |= coverage; |
|
lineSurroundingCoverage &= coverage; |
|
} |
|
|
|
// background color is possible? |
|
if (lineSurroundingCoverage == 0 && compareColors(color, tcu::RGBA::black(), args.redBits, args.greenBits, args.blueBits)) |
|
continue; |
|
|
|
// Check those lines |
|
|
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
if (((lineCoverageSet >> lineNdx) & 0x01) != 0) |
|
{ |
|
const float wa = scene.lines[lineNdx].positions[0].w(); |
|
const float wb = scene.lines[lineNdx].positions[1].w(); |
|
const tcu::Vec2 pa = screenspaceLines[lineNdx].swizzle(0, 1); |
|
const tcu::Vec2 pb = screenspaceLines[lineNdx].swizzle(2, 3); |
|
|
|
const LineInterpolationRange range = (interpolationMethod == LINEINTERPOLATION_STRICTLY_CORRECT) |
|
? (calcSingleSampleLineInterpolationRange(pa, wa, pb, wb, tcu::IVec2(x, y), args.subpixelBits)) |
|
: (calcSingleSampleLineInterpolationRangeAxisProjected(pa, wa, pb, wb, tcu::IVec2(x, y), args.subpixelBits)); |
|
|
|
const tcu::Vec4 valueMin = de::clamp(range.min.x(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[0] + de::clamp(range.min.y(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[1]; |
|
const tcu::Vec4 valueMax = de::clamp(range.max.x(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[0] + de::clamp(range.max.y(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[1]; |
|
|
|
const tcu::Vec3 colorMinF (de::clamp(valueMin.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueMin.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueMin.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::Vec3 colorMaxF (de::clamp(valueMax.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueMax.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueMax.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::IVec3 colorMin ((int)deFloatFloor(colorMinF.x()), |
|
(int)deFloatFloor(colorMinF.y()), |
|
(int)deFloatFloor(colorMinF.z())); |
|
const tcu::IVec3 colorMax ((int)deFloatCeil (colorMaxF.x()), |
|
(int)deFloatCeil (colorMaxF.y()), |
|
(int)deFloatCeil (colorMaxF.z())); |
|
|
|
// Verify validity |
|
if (pixelNativeColor.x() < colorMin.x() || |
|
pixelNativeColor.y() < colorMin.y() || |
|
pixelNativeColor.z() < colorMin.z() || |
|
pixelNativeColor.x() > colorMax.x() || |
|
pixelNativeColor.y() > colorMax.y() || |
|
pixelNativeColor.z() > colorMax.z()) |
|
{ |
|
if (errorCount < errorFloodThreshold) |
|
{ |
|
// Store candidate information for logging |
|
SingleSampleNarrowLineCandidate candidate; |
|
|
|
candidate.lineNdx = lineNdx; |
|
candidate.colorMin = colorMin; |
|
candidate.colorMax = colorMax; |
|
candidate.colorMinF = colorMinF; |
|
candidate.colorMaxF = colorMaxF; |
|
candidate.valueRangeMin = valueMin.swizzle(0, 1, 2); |
|
candidate.valueRangeMax = valueMax.swizzle(0, 1, 2); |
|
|
|
candidates.push_back(candidate); |
|
} |
|
} |
|
else |
|
{ |
|
matchFound = true; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (matchFound) |
|
continue; |
|
|
|
// invalid fragment |
|
++invalidPixels; |
|
errorMask.setPixel(x, y, invalidPixelColor); |
|
|
|
++errorCount; |
|
|
|
// don't fill the logs with too much data |
|
if (errorCount < errorFloodThreshold) |
|
{ |
|
log << tcu::TestLog::Message |
|
<< "Found an invalid pixel at (" << x << "," << y << "), " << (int)candidates.size() << " candidate reference value(s) found:\n" |
|
<< "\tPixel color:\t\t" << color << "\n" |
|
<< "\tNative color:\t\t" << pixelNativeColor << "\n" |
|
<< tcu::TestLog::EndMessage; |
|
|
|
for (int candidateNdx = 0; candidateNdx < (int)candidates.size(); ++candidateNdx) |
|
{ |
|
const SingleSampleNarrowLineCandidate& candidate = candidates[candidateNdx]; |
|
|
|
log << tcu::TestLog::Message << "\tCandidate (line " << candidate.lineNdx << "):\n" |
|
<< "\t\tReference native color min: " << tcu::clamp(candidate.colorMin, tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\t\tReference native color max: " << tcu::clamp(candidate.colorMax, tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\t\tReference native float min: " << tcu::clamp(candidate.colorMinF, tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\t\tReference native float max: " << tcu::clamp(candidate.colorMaxF, tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\t\tFmin:\t" << tcu::clamp(candidate.valueRangeMin, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n" |
|
<< "\t\tFmax:\t" << tcu::clamp(candidate.valueRangeMax, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n" |
|
<< tcu::TestLog::EndMessage; |
|
} |
|
} |
|
} |
|
|
|
// don't just hide failures |
|
if (errorCount > errorFloodThreshold) |
|
log << tcu::TestLog::Message << "Omitted " << (errorCount-errorFloodThreshold) << " pixel error description(s)." << tcu::TestLog::EndMessage; |
|
|
|
// report result |
|
if (invalidPixels) |
|
{ |
|
log << tcu::TestLog::Message << invalidPixels << " invalid pixel(s) found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::Image("ErrorMask", "ErrorMask", errorMask) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return false; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "No invalid pixels found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return true; |
|
} |
|
} |
|
|
|
bool verifySinglesampleNarrowLineGroupInterpolation (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
DE_ASSERT(scene.lineWidth == 1.0f); |
|
return verifyLineGroupPixelIndependentInterpolation(surface, scene, args, log, LINEINTERPOLATION_STRICTLY_CORRECT); |
|
} |
|
|
|
bool verifyLineGroupInterpolationWithProjectedWeights (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
return verifyLineGroupPixelIndependentInterpolation(surface, scene, args, log, LINEINTERPOLATION_PROJECTED); |
|
} |
|
|
|
struct SingleSampleWideLineCandidate |
|
{ |
|
struct InterpolationPointCandidate |
|
{ |
|
tcu::IVec2 interpolationPoint; |
|
tcu::IVec3 colorMin; |
|
tcu::IVec3 colorMax; |
|
tcu::Vec3 colorMinF; |
|
tcu::Vec3 colorMaxF; |
|
tcu::Vec3 valueRangeMin; |
|
tcu::Vec3 valueRangeMax; |
|
}; |
|
|
|
int lineNdx; |
|
int numCandidates; |
|
InterpolationPointCandidate interpolationCandidates[3]; |
|
}; |
|
|
|
// return point on line at a given position on a given axis |
|
tcu::Vec2 getLineCoordAtAxisCoord (const tcu::Vec2& pa, const tcu::Vec2& pb, bool isXAxis, float axisCoord) |
|
{ |
|
const int fixedCoordNdx = (isXAxis) ? (0) : (1); |
|
const int varyingCoordNdx = (isXAxis) ? (1) : (0); |
|
|
|
const float fixedDifference = pb[fixedCoordNdx] - pa[fixedCoordNdx]; |
|
const float varyingDifference = pb[varyingCoordNdx] - pa[varyingCoordNdx]; |
|
|
|
DE_ASSERT(fixedDifference != 0.0f); |
|
|
|
const float resultFixedCoord = axisCoord; |
|
const float resultVaryingCoord = pa[varyingCoordNdx] + (axisCoord - pa[fixedCoordNdx]) * (varyingDifference / fixedDifference); |
|
|
|
return (isXAxis) ? (tcu::Vec2(resultFixedCoord, resultVaryingCoord)) |
|
: (tcu::Vec2(resultVaryingCoord, resultFixedCoord)); |
|
} |
|
|
|
bool isBlack (const tcu::RGBA& c) |
|
{ |
|
return c.getRed() == 0 && c.getGreen() == 0 && c.getBlue() == 0; |
|
} |
|
|
|
bool verifySinglesampleWideLineGroupInterpolation (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
DE_ASSERT(deFloatFrac(scene.lineWidth) != 0.5f); // rounding direction is not defined, disallow undefined cases |
|
DE_ASSERT(scene.lines.size() < 8); // coverage indices are stored as bitmask in a unsigned 8-bit ints |
|
|
|
enum |
|
{ |
|
FLAG_ROOT_NOT_SET = (1u << 16) |
|
}; |
|
|
|
const tcu::RGBA invalidPixelColor = tcu::RGBA(255, 0, 0, 255); |
|
const tcu::IVec2 viewportSize = tcu::IVec2(surface.getWidth(), surface.getHeight()); |
|
const int errorFloodThreshold = 4; |
|
int errorCount = 0; |
|
tcu::Surface errorMask (surface.getWidth(), surface.getHeight()); |
|
int invalidPixels = 0; |
|
std::vector<tcu::Vec4> effectiveLines (scene.lines.size()); //!< packed (x0, y0, x1, y1) |
|
std::vector<bool> lineIsXMajor (scene.lines.size()); |
|
|
|
// for each line, for every distinct major direction fragment, store root pixel location (along |
|
// minor direction); |
|
std::vector<std::vector<deUint32> > rootPixelLocation (scene.lines.size()); //!< packed [16b - flags] [16b - coordinate] |
|
|
|
// log format |
|
|
|
log << tcu::TestLog::Message << "Verifying rasterization result. Native format is RGB" << args.redBits << args.greenBits << args.blueBits << tcu::TestLog::EndMessage; |
|
if (args.redBits > 8 || args.greenBits > 8 || args.blueBits > 8) |
|
log << tcu::TestLog::Message << "Warning! More than 8 bits in a color channel, this may produce false negatives." << tcu::TestLog::EndMessage; |
|
|
|
// Reference renderer produces correct fragments using the diamond-exit-rule. Make 2D int array, store line coverage as a 8-bit bitfield |
|
// The map is used to find lines with potential coverage to a given pixel |
|
tcu::TextureLevel referenceLineMap(tcu::TextureFormat(tcu::TextureFormat::R, tcu::TextureFormat::UNSIGNED_INT8), surface.getWidth(), surface.getHeight()); |
|
tcu::clear(referenceLineMap.getAccess(), tcu::IVec4(0, 0, 0, 0)); |
|
|
|
tcu::clear(errorMask.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f)); |
|
|
|
// calculate mask and effective line coordinates |
|
{ |
|
std::vector<tcu::Vec4> screenspaceLines(scene.lines.size()); |
|
|
|
genScreenSpaceLines(screenspaceLines, scene.lines, viewportSize); |
|
setMaskMapCoverageBitForLines(screenspaceLines, scene.lineWidth, referenceLineMap.getAccess()); |
|
|
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
const tcu::Vec2 lineScreenSpaceP0 = screenspaceLines[lineNdx].swizzle(0, 1); |
|
const tcu::Vec2 lineScreenSpaceP1 = screenspaceLines[lineNdx].swizzle(2, 3); |
|
const bool isXMajor = isPackedSSLineXMajor(screenspaceLines[lineNdx]); |
|
|
|
lineIsXMajor[lineNdx] = isXMajor; |
|
|
|
// wide line interpolations are calculated for a line moved in minor direction |
|
{ |
|
const float offsetLength = (scene.lineWidth - 1.0f) / 2.0f; |
|
const tcu::Vec2 offsetDirection = (isXMajor) ? (tcu::Vec2(0.0f, -1.0f)) : (tcu::Vec2(-1.0f, 0.0f)); |
|
const tcu::Vec2 offset = offsetDirection * offsetLength; |
|
|
|
effectiveLines[lineNdx] = tcu::Vec4(lineScreenSpaceP0.x() + offset.x(), |
|
lineScreenSpaceP0.y() + offset.y(), |
|
lineScreenSpaceP1.x() + offset.x(), |
|
lineScreenSpaceP1.y() + offset.y()); |
|
} |
|
} |
|
} |
|
|
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
// Calculate root pixel lookup table for this line. Since the implementation's fragment |
|
// major coordinate range might not be a subset of the correct line range (they are allowed |
|
// to vary by one pixel), we must extend the domain to cover whole viewport along major |
|
// dimension. |
|
// |
|
// Expanding line strip to (effectively) infinite line might result in exit-diamnod set |
|
// that is not a superset of the exit-diamond set of the line strip. In practice, this |
|
// won't be an issue, since the allow-one-pixel-variation rule should tolerate this even |
|
// if the original and extended line would resolve differently a diamond the line just |
|
// touches (precision lost in expansion changes enter/exit status). |
|
|
|
{ |
|
const bool isXMajor = lineIsXMajor[lineNdx]; |
|
const int majorSize = (isXMajor) ? (surface.getWidth()) : (surface.getHeight()); |
|
rr::LineExitDiamondGenerator diamondGenerator; |
|
rr::LineExitDiamond diamonds[32]; |
|
int numRasterized = DE_LENGTH_OF_ARRAY(diamonds); |
|
|
|
// Expand to effectively infinite line (endpoints are just one pixel over viewport boundaries) |
|
const tcu::Vec2 expandedP0 = getLineCoordAtAxisCoord(effectiveLines[lineNdx].swizzle(0, 1), effectiveLines[lineNdx].swizzle(2, 3), isXMajor, -1.0f); |
|
const tcu::Vec2 expandedP1 = getLineCoordAtAxisCoord(effectiveLines[lineNdx].swizzle(0, 1), effectiveLines[lineNdx].swizzle(2, 3), isXMajor, (float)majorSize + 1.0f); |
|
|
|
diamondGenerator.init(tcu::Vec4(expandedP0.x(), expandedP0.y(), 0.0f, 1.0f), |
|
tcu::Vec4(expandedP1.x(), expandedP1.y(), 0.0f, 1.0f)); |
|
|
|
rootPixelLocation[lineNdx].resize(majorSize, FLAG_ROOT_NOT_SET); |
|
|
|
while (numRasterized == DE_LENGTH_OF_ARRAY(diamonds)) |
|
{ |
|
diamondGenerator.rasterize(diamonds, DE_LENGTH_OF_ARRAY(diamonds), numRasterized); |
|
|
|
for (int packetNdx = 0; packetNdx < numRasterized; ++packetNdx) |
|
{ |
|
const tcu::IVec2 fragPos = diamonds[packetNdx].position; |
|
const int majorPos = (isXMajor) ? (fragPos.x()) : (fragPos.y()); |
|
const int rootPos = (isXMajor) ? (fragPos.y()) : (fragPos.x()); |
|
const deUint32 packed = (deUint32)((deUint16)((deInt16)rootPos)); |
|
|
|
// infinite line will generate some diamonds outside the viewport |
|
if (deInBounds32(majorPos, 0, majorSize)) |
|
{ |
|
DE_ASSERT((rootPixelLocation[lineNdx][majorPos] & FLAG_ROOT_NOT_SET) != 0u); |
|
rootPixelLocation[lineNdx][majorPos] = packed; |
|
} |
|
} |
|
} |
|
|
|
// Filled whole lookup table |
|
for (int majorPos = 0; majorPos < majorSize; ++majorPos) |
|
DE_ASSERT((rootPixelLocation[lineNdx][majorPos] & FLAG_ROOT_NOT_SET) == 0u); |
|
} |
|
} |
|
|
|
// Find all possible lines with coverage, check pixel color matches one of them |
|
|
|
for (int y = 1; y < surface.getHeight() - 1; ++y) |
|
for (int x = 1; x < surface.getWidth() - 1; ++x) |
|
{ |
|
const tcu::RGBA color = surface.getPixel(x, y); |
|
const tcu::IVec3 pixelNativeColor = convertRGB8ToNativeFormat(color, args); // Convert pixel color from rgba8 to the real pixel format. Usually rgba8 or 565 |
|
int lineCoverageSet = 0; // !< lines that may cover this fragment |
|
int lineSurroundingCoverage = 0xFFFF; // !< lines that will cover this fragment |
|
bool matchFound = false; |
|
const tcu::IVec3 formatLimit ((1 << args.redBits) - 1, (1 << args.greenBits) - 1, (1 << args.blueBits) - 1); |
|
|
|
std::vector<SingleSampleWideLineCandidate> candidates; |
|
|
|
// Find lines with possible coverage |
|
|
|
for (int dy = -1; dy < 2; ++dy) |
|
for (int dx = -1; dx < 2; ++dx) |
|
{ |
|
const int coverage = referenceLineMap.getAccess().getPixelInt(x+dx, y+dy).x(); |
|
|
|
lineCoverageSet |= coverage; |
|
lineSurroundingCoverage &= coverage; |
|
} |
|
|
|
// background color is possible? |
|
if (lineSurroundingCoverage == 0 && compareColors(color, tcu::RGBA::black(), args.redBits, args.greenBits, args.blueBits)) |
|
continue; |
|
|
|
// Check those lines |
|
|
|
for (int lineNdx = 0; lineNdx < (int)scene.lines.size(); ++lineNdx) |
|
{ |
|
if (((lineCoverageSet >> lineNdx) & 0x01) != 0) |
|
{ |
|
const float wa = scene.lines[lineNdx].positions[0].w(); |
|
const float wb = scene.lines[lineNdx].positions[1].w(); |
|
const tcu::Vec2 pa = effectiveLines[lineNdx].swizzle(0, 1); |
|
const tcu::Vec2 pb = effectiveLines[lineNdx].swizzle(2, 3); |
|
|
|
// \note Wide line fragments are generated by replicating the root fragment for each |
|
// fragment column (row for y-major). Calculate interpolation at the root |
|
// fragment. |
|
const bool isXMajor = lineIsXMajor[lineNdx]; |
|
const int majorPosition = (isXMajor) ? (x) : (y); |
|
const deUint32 minorInfoPacked = rootPixelLocation[lineNdx][majorPosition]; |
|
const int minorPosition = (int)((deInt16)((deUint16)(minorInfoPacked & 0xFFFFu))); |
|
const tcu::IVec2 idealRootPos = (isXMajor) ? (tcu::IVec2(majorPosition, minorPosition)) : (tcu::IVec2(minorPosition, majorPosition)); |
|
const tcu::IVec2 minorDirection = (isXMajor) ? (tcu::IVec2(0, 1)) : (tcu::IVec2(1, 0)); |
|
|
|
SingleSampleWideLineCandidate candidate; |
|
|
|
candidate.lineNdx = lineNdx; |
|
candidate.numCandidates = 0; |
|
DE_STATIC_ASSERT(DE_LENGTH_OF_ARRAY(candidate.interpolationCandidates) == 3); |
|
|
|
// Interpolation happens at the root fragment, which is then replicated in minor |
|
// direction. Search for implementation's root position near accurate root. |
|
for (int minorOffset = -1; minorOffset < 2; ++minorOffset) |
|
{ |
|
const tcu::IVec2 rootPosition = idealRootPos + minorOffset * minorDirection; |
|
|
|
// A fragment can be root fragment only if it exists |
|
// \note root fragment can "exist" outside viewport |
|
// \note no pixel format theshold since in this case allowing only black is more conservative |
|
if (deInBounds32(rootPosition.x(), 0, surface.getWidth()) && |
|
deInBounds32(rootPosition.y(), 0, surface.getHeight()) && |
|
isBlack(surface.getPixel(rootPosition.x(), rootPosition.y()))) |
|
{ |
|
continue; |
|
} |
|
|
|
const LineInterpolationRange range = calcSingleSampleLineInterpolationRange(pa, wa, pb, wb, rootPosition, args.subpixelBits); |
|
|
|
const tcu::Vec4 valueMin = de::clamp(range.min.x(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[0] + de::clamp(range.min.y(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[1]; |
|
const tcu::Vec4 valueMax = de::clamp(range.max.x(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[0] + de::clamp(range.max.y(), 0.0f, 1.0f) * scene.lines[lineNdx].colors[1]; |
|
|
|
const tcu::Vec3 colorMinF (de::clamp(valueMin.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueMin.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueMin.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::Vec3 colorMaxF (de::clamp(valueMax.x() * (float)formatLimit.x(), 0.0f, (float)formatLimit.x()), |
|
de::clamp(valueMax.y() * (float)formatLimit.y(), 0.0f, (float)formatLimit.y()), |
|
de::clamp(valueMax.z() * (float)formatLimit.z(), 0.0f, (float)formatLimit.z())); |
|
const tcu::IVec3 colorMin ((int)deFloatFloor(colorMinF.x()), |
|
(int)deFloatFloor(colorMinF.y()), |
|
(int)deFloatFloor(colorMinF.z())); |
|
const tcu::IVec3 colorMax ((int)deFloatCeil (colorMaxF.x()), |
|
(int)deFloatCeil (colorMaxF.y()), |
|
(int)deFloatCeil (colorMaxF.z())); |
|
|
|
// Verify validity |
|
if (pixelNativeColor.x() < colorMin.x() || |
|
pixelNativeColor.y() < colorMin.y() || |
|
pixelNativeColor.z() < colorMin.z() || |
|
pixelNativeColor.x() > colorMax.x() || |
|
pixelNativeColor.y() > colorMax.y() || |
|
pixelNativeColor.z() > colorMax.z()) |
|
{ |
|
if (errorCount < errorFloodThreshold) |
|
{ |
|
// Store candidate information for logging |
|
SingleSampleWideLineCandidate::InterpolationPointCandidate& interpolationCandidate = candidate.interpolationCandidates[candidate.numCandidates++]; |
|
DE_ASSERT(candidate.numCandidates <= DE_LENGTH_OF_ARRAY(candidate.interpolationCandidates)); |
|
|
|
interpolationCandidate.interpolationPoint = rootPosition; |
|
interpolationCandidate.colorMin = colorMin; |
|
interpolationCandidate.colorMax = colorMax; |
|
interpolationCandidate.colorMinF = colorMinF; |
|
interpolationCandidate.colorMaxF = colorMaxF; |
|
interpolationCandidate.valueRangeMin = valueMin.swizzle(0, 1, 2); |
|
interpolationCandidate.valueRangeMax = valueMax.swizzle(0, 1, 2); |
|
} |
|
} |
|
else |
|
{ |
|
matchFound = true; |
|
break; |
|
} |
|
} |
|
|
|
if (!matchFound) |
|
{ |
|
// store info for logging |
|
if (errorCount < errorFloodThreshold && candidate.numCandidates > 0) |
|
candidates.push_back(candidate); |
|
} |
|
else |
|
{ |
|
// no need to check other lines |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (matchFound) |
|
continue; |
|
|
|
// invalid fragment |
|
++invalidPixels; |
|
errorMask.setPixel(x, y, invalidPixelColor); |
|
|
|
++errorCount; |
|
|
|
// don't fill the logs with too much data |
|
if (errorCount < errorFloodThreshold) |
|
{ |
|
tcu::MessageBuilder msg(&log); |
|
|
|
msg << "Found an invalid pixel at (" << x << "," << y << "), " << (int)candidates.size() << " candidate reference value(s) found:\n" |
|
<< "\tPixel color:\t\t" << color << "\n" |
|
<< "\tNative color:\t\t" << pixelNativeColor << "\n"; |
|
|
|
for (int lineCandidateNdx = 0; lineCandidateNdx < (int)candidates.size(); ++lineCandidateNdx) |
|
{ |
|
const SingleSampleWideLineCandidate& candidate = candidates[lineCandidateNdx]; |
|
|
|
msg << "\tCandidate line (line " << candidate.lineNdx << "):\n"; |
|
|
|
for (int interpolationCandidateNdx = 0; interpolationCandidateNdx < candidate.numCandidates; ++interpolationCandidateNdx) |
|
{ |
|
const SingleSampleWideLineCandidate::InterpolationPointCandidate& interpolationCandidate = candidate.interpolationCandidates[interpolationCandidateNdx]; |
|
|
|
msg << "\t\tCandidate interpolation point (index " << interpolationCandidateNdx << "):\n" |
|
<< "\t\t\tRoot fragment position (non-replicated fragment): " << interpolationCandidate.interpolationPoint << ":\n" |
|
<< "\t\t\tReference native color min: " << tcu::clamp(interpolationCandidate.colorMin, tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\t\t\tReference native color max: " << tcu::clamp(interpolationCandidate.colorMax, tcu::IVec3(0,0,0), formatLimit) << "\n" |
|
<< "\t\t\tReference native float min: " << tcu::clamp(interpolationCandidate.colorMinF, tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\t\t\tReference native float max: " << tcu::clamp(interpolationCandidate.colorMaxF, tcu::Vec3(0.0f, 0.0f, 0.0f), formatLimit.cast<float>()) << "\n" |
|
<< "\t\t\tFmin:\t" << tcu::clamp(interpolationCandidate.valueRangeMin, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n" |
|
<< "\t\t\tFmax:\t" << tcu::clamp(interpolationCandidate.valueRangeMax, tcu::Vec3(0.0f, 0.0f, 0.0f), tcu::Vec3(1.0f, 1.0f, 1.0f)) << "\n"; |
|
} |
|
} |
|
|
|
msg << tcu::TestLog::EndMessage; |
|
} |
|
} |
|
|
|
// don't just hide failures |
|
if (errorCount > errorFloodThreshold) |
|
log << tcu::TestLog::Message << "Omitted " << (errorCount-errorFloodThreshold) << " pixel error description(s)." << tcu::TestLog::EndMessage; |
|
|
|
// report result |
|
if (invalidPixels) |
|
{ |
|
log << tcu::TestLog::Message << invalidPixels << " invalid pixel(s) found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::Image("ErrorMask", "ErrorMask", errorMask) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return false; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "No invalid pixels found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
|
|
return true; |
|
} |
|
} |
|
|
|
} // anonymous |
|
|
|
CoverageType calculateTriangleCoverage (const tcu::Vec4& p0, const tcu::Vec4& p1, const tcu::Vec4& p2, const tcu::IVec2& pixel, const tcu::IVec2& viewportSize, int subpixelBits, bool multisample) |
|
{ |
|
typedef tcu::Vector<deInt64, 2> I64Vec2; |
|
|
|
const deUint64 numSubPixels = ((deUint64)1) << subpixelBits; |
|
const deUint64 pixelHitBoxSize = (multisample) ? (numSubPixels) : (2+2); //!< allow 4 central (2x2) for non-multisample pixels. Rounding may move edges 1 subpixel to any direction. |
|
const bool order = isTriangleClockwise(p0, p1, p2); //!< clockwise / counter-clockwise |
|
const tcu::Vec4& orderedP0 = p0; //!< vertices of a clockwise triangle |
|
const tcu::Vec4& orderedP1 = (order) ? (p1) : (p2); |
|
const tcu::Vec4& orderedP2 = (order) ? (p2) : (p1); |
|
const tcu::Vec2 triangleNormalizedDeviceSpace[3] = |
|
{ |
|
tcu::Vec2(orderedP0.x() / orderedP0.w(), orderedP0.y() / orderedP0.w()), |
|
tcu::Vec2(orderedP1.x() / orderedP1.w(), orderedP1.y() / orderedP1.w()), |
|
tcu::Vec2(orderedP2.x() / orderedP2.w(), orderedP2.y() / orderedP2.w()), |
|
}; |
|
const tcu::Vec2 triangleScreenSpace[3] = |
|
{ |
|
(triangleNormalizedDeviceSpace[0] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
|
(triangleNormalizedDeviceSpace[1] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
|
(triangleNormalizedDeviceSpace[2] + tcu::Vec2(1.0f, 1.0f)) * 0.5f * tcu::Vec2((float)viewportSize.x(), (float)viewportSize.y()), |
|
}; |
|
|
|
// Broad bounding box - pixel check |
|
{ |
|
const float minX = de::min(de::min(triangleScreenSpace[0].x(), triangleScreenSpace[1].x()), triangleScreenSpace[2].x()); |
|
const float minY = de::min(de::min(triangleScreenSpace[0].y(), triangleScreenSpace[1].y()), triangleScreenSpace[2].y()); |
|
const float maxX = de::max(de::max(triangleScreenSpace[0].x(), triangleScreenSpace[1].x()), triangleScreenSpace[2].x()); |
|
const float maxY = de::max(de::max(triangleScreenSpace[0].y(), triangleScreenSpace[1].y()), triangleScreenSpace[2].y()); |
|
|
|
if ((float)pixel.x() > maxX + 1 || |
|
(float)pixel.y() > maxY + 1 || |
|
(float)pixel.x() < minX - 1 || |
|
(float)pixel.y() < minY - 1) |
|
return COVERAGE_NONE; |
|
} |
|
|
|
// Broad triangle - pixel area intersection |
|
{ |
|
const I64Vec2 pixelCenterPosition = I64Vec2(pixel.x(), pixel.y()) * I64Vec2(numSubPixels, numSubPixels) + I64Vec2(numSubPixels / 2, numSubPixels / 2); |
|
const I64Vec2 triangleSubPixelSpaceRound[3] = |
|
{ |
|
I64Vec2(deRoundFloatToInt32(triangleScreenSpace[0].x() * (float)numSubPixels), deRoundFloatToInt32(triangleScreenSpace[0].y() * (float)numSubPixels)), |
|
I64Vec2(deRoundFloatToInt32(triangleScreenSpace[1].x() * (float)numSubPixels), deRoundFloatToInt32(triangleScreenSpace[1].y() * (float)numSubPixels)), |
|
I64Vec2(deRoundFloatToInt32(triangleScreenSpace[2].x() * (float)numSubPixels), deRoundFloatToInt32(triangleScreenSpace[2].y() * (float)numSubPixels)), |
|
}; |
|
|
|
// Check (using cross product) if pixel center is |
|
// a) too far from any edge |
|
// b) fully inside all edges |
|
bool insideAllEdges = true; |
|
for (int vtxNdx = 0; vtxNdx < 3; ++vtxNdx) |
|
{ |
|
const int otherVtxNdx = (vtxNdx + 1) % 3; |
|
const deInt64 maxPixelDistanceSquared = pixelHitBoxSize*pixelHitBoxSize; // Max distance from the pixel center from within the pixel is (sqrt(2) * boxWidth/2). Use 2x value for rounding tolerance |
|
const I64Vec2 edge = triangleSubPixelSpaceRound[otherVtxNdx] - triangleSubPixelSpaceRound[vtxNdx]; |
|
const I64Vec2 v = pixelCenterPosition - triangleSubPixelSpaceRound[vtxNdx]; |
|
const deInt64 crossProduct = (edge.x() * v.y() - edge.y() * v.x()); |
|
|
|
// distance from edge: (edge x v) / |edge| |
|
// (edge x v) / |edge| > maxPixelDistance |
|
// ==> (edge x v)^2 / edge^2 > maxPixelDistance^2 | edge x v > 0 |
|
// ==> (edge x v)^2 > maxPixelDistance^2 * edge^2 |
|
if (crossProduct < 0 && crossProduct*crossProduct > maxPixelDistanceSquared * tcu::lengthSquared(edge)) |
|
return COVERAGE_NONE; |
|
if (crossProduct < 0 || crossProduct*crossProduct < maxPixelDistanceSquared * tcu::lengthSquared(edge)) |
|
insideAllEdges = false; |
|
} |
|
|
|
if (insideAllEdges) |
|
return COVERAGE_FULL; |
|
} |
|
|
|
// Accurate intersection for edge pixels |
|
{ |
|
// In multisampling, the sample points can be anywhere in the pixel, and in single sampling only in the center. |
|
const I64Vec2 pixelCorners[4] = |
|
{ |
|
I64Vec2((pixel.x()+0) * numSubPixels, (pixel.y()+0) * numSubPixels), |
|
I64Vec2((pixel.x()+1) * numSubPixels, (pixel.y()+0) * numSubPixels), |
|
I64Vec2((pixel.x()+1) * numSubPixels, (pixel.y()+1) * numSubPixels), |
|
I64Vec2((pixel.x()+0) * numSubPixels, (pixel.y()+1) * numSubPixels), |
|
}; |
|
const I64Vec2 pixelCenterCorners[4] = |
|
{ |
|
I64Vec2(pixel.x() * numSubPixels + numSubPixels/2 + 0, pixel.y() * numSubPixels + numSubPixels/2 + 0), |
|
I64Vec2(pixel.x() * numSubPixels + numSubPixels/2 + 1, pixel.y() * numSubPixels + numSubPixels/2 + 0), |
|
I64Vec2(pixel.x() * numSubPixels + numSubPixels/2 + 1, pixel.y() * numSubPixels + numSubPixels/2 + 1), |
|
I64Vec2(pixel.x() * numSubPixels + numSubPixels/2 + 0, pixel.y() * numSubPixels + numSubPixels/2 + 1), |
|
}; |
|
|
|
// both rounding directions |
|
const I64Vec2 triangleSubPixelSpaceFloor[3] = |
|
{ |
|
I64Vec2(deFloorFloatToInt32(triangleScreenSpace[0].x() * (float)numSubPixels), deFloorFloatToInt32(triangleScreenSpace[0].y() * (float)numSubPixels)), |
|
I64Vec2(deFloorFloatToInt32(triangleScreenSpace[1].x() * (float)numSubPixels), deFloorFloatToInt32(triangleScreenSpace[1].y() * (float)numSubPixels)), |
|
I64Vec2(deFloorFloatToInt32(triangleScreenSpace[2].x() * (float)numSubPixels), deFloorFloatToInt32(triangleScreenSpace[2].y() * (float)numSubPixels)), |
|
}; |
|
const I64Vec2 triangleSubPixelSpaceCeil[3] = |
|
{ |
|
I64Vec2(deCeilFloatToInt32(triangleScreenSpace[0].x() * (float)numSubPixels), deCeilFloatToInt32(triangleScreenSpace[0].y() * (float)numSubPixels)), |
|
I64Vec2(deCeilFloatToInt32(triangleScreenSpace[1].x() * (float)numSubPixels), deCeilFloatToInt32(triangleScreenSpace[1].y() * (float)numSubPixels)), |
|
I64Vec2(deCeilFloatToInt32(triangleScreenSpace[2].x() * (float)numSubPixels), deCeilFloatToInt32(triangleScreenSpace[2].y() * (float)numSubPixels)), |
|
}; |
|
const I64Vec2* const corners = (multisample) ? (pixelCorners) : (pixelCenterCorners); |
|
|
|
// Test if any edge (with any rounding) intersects the pixel (boundary). If it does => Partial. If not => fully inside or outside |
|
|
|
for (int edgeNdx = 0; edgeNdx < 3; ++edgeNdx) |
|
for (int startRounding = 0; startRounding < 4; ++startRounding) |
|
for (int endRounding = 0; endRounding < 4; ++endRounding) |
|
{ |
|
const int nextEdgeNdx = (edgeNdx+1) % 3; |
|
const I64Vec2 startPos ((startRounding&0x01) ? (triangleSubPixelSpaceFloor[edgeNdx].x()) : (triangleSubPixelSpaceCeil[edgeNdx].x()), (startRounding&0x02) ? (triangleSubPixelSpaceFloor[edgeNdx].y()) : (triangleSubPixelSpaceCeil[edgeNdx].y())); |
|
const I64Vec2 endPos ((endRounding&0x01) ? (triangleSubPixelSpaceFloor[nextEdgeNdx].x()) : (triangleSubPixelSpaceCeil[nextEdgeNdx].x()), (endRounding&0x02) ? (triangleSubPixelSpaceFloor[nextEdgeNdx].y()) : (triangleSubPixelSpaceCeil[nextEdgeNdx].y())); |
|
|
|
for (int pixelEdgeNdx = 0; pixelEdgeNdx < 4; ++pixelEdgeNdx) |
|
{ |
|
const int pixelEdgeEnd = (pixelEdgeNdx + 1) % 4; |
|
|
|
if (lineLineIntersect(startPos, endPos, corners[pixelEdgeNdx], corners[pixelEdgeEnd])) |
|
return COVERAGE_PARTIAL; |
|
} |
|
} |
|
|
|
// fully inside or outside |
|
for (int edgeNdx = 0; edgeNdx < 3; ++edgeNdx) |
|
{ |
|
const int nextEdgeNdx = (edgeNdx+1) % 3; |
|
const I64Vec2& startPos = triangleSubPixelSpaceFloor[edgeNdx]; |
|
const I64Vec2& endPos = triangleSubPixelSpaceFloor[nextEdgeNdx]; |
|
const I64Vec2 edge = endPos - startPos; |
|
const I64Vec2 v = corners[0] - endPos; |
|
const deInt64 crossProduct = (edge.x() * v.y() - edge.y() * v.x()); |
|
|
|
// a corner of the pixel is outside => "fully inside" option is impossible |
|
if (crossProduct < 0) |
|
return COVERAGE_NONE; |
|
} |
|
|
|
return COVERAGE_FULL; |
|
} |
|
} |
|
|
|
static void verifyTriangleGroupRasterizationLog (const tcu::Surface& surface, tcu::TestLog& log, VerifyTriangleGroupRasterizationLogStash& logStash) |
|
{ |
|
// Output results |
|
log << tcu::TestLog::Message << "Verifying rasterization result." << tcu::TestLog::EndMessage; |
|
|
|
if (!logStash.result) |
|
{ |
|
log << tcu::TestLog::Message << "Invalid pixels found:\n\t" |
|
<< logStash.missingPixels << " missing pixels. (Marked with purple)\n\t" |
|
<< logStash.unexpectedPixels << " incorrectly filled pixels. (Marked with red)\n\t" |
|
<< "Unknown (subpixel on edge) pixels are marked with yellow." |
|
<< tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::Image("ErrorMask", "ErrorMask", logStash.errorMask) |
|
<< tcu::TestLog::EndImageSet; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "No invalid pixels found." << tcu::TestLog::EndMessage; |
|
log << tcu::TestLog::ImageSet("Verification result", "Result of rendering") |
|
<< tcu::TestLog::Image("Result", "Result", surface) |
|
<< tcu::TestLog::EndImageSet; |
|
} |
|
} |
|
|
|
bool verifyTriangleGroupRasterization (const tcu::Surface& surface, const TriangleSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log, VerificationMode mode, VerifyTriangleGroupRasterizationLogStash* logStash) |
|
{ |
|
DE_ASSERT(mode < VERIFICATIONMODE_LAST); |
|
|
|
const tcu::RGBA backGroundColor = tcu::RGBA(0, 0, 0, 255); |
|
const tcu::RGBA triangleColor = tcu::RGBA(255, 255, 255, 255); |
|
const tcu::RGBA missingPixelColor = tcu::RGBA(255, 0, 255, 255); |
|
const tcu::RGBA unexpectedPixelColor = tcu::RGBA(255, 0, 0, 255); |
|
const tcu::RGBA partialPixelColor = tcu::RGBA(255, 255, 0, 255); |
|
const tcu::RGBA primitivePixelColor = tcu::RGBA(30, 30, 30, 255); |
|
const int weakVerificationThreshold = 10; |
|
const bool multisampled = (args.numSamples != 0); |
|
const tcu::IVec2 viewportSize = tcu::IVec2(surface.getWidth(), surface.getHeight()); |
|
int missingPixels = 0; |
|
int unexpectedPixels = 0; |
|
int subPixelBits = args.subpixelBits; |
|
tcu::TextureLevel coverageMap (tcu::TextureFormat(tcu::TextureFormat::R, tcu::TextureFormat::UNSIGNED_INT8), surface.getWidth(), surface.getHeight()); |
|
tcu::Surface errorMask (surface.getWidth(), surface.getHeight()); |
|
bool result = false; |
|
|
|
// subpixel bits in in a valid range? |
|
|
|
if (subPixelBits < 0) |
|
{ |
|
log << tcu::TestLog::Message << "Invalid subpixel count (" << subPixelBits << "), assuming 0" << tcu::TestLog::EndMessage; |
|
subPixelBits = 0; |
|
} |
|
else if (subPixelBits > 16) |
|
{ |
|
// At high subpixel bit counts we might overflow. Checking at lower bit count is ok, but is less strict |
|
log << tcu::TestLog::Message << "Subpixel count is greater than 16 (" << subPixelBits << "). Checking results using less strict 16 bit requirements. This may produce false positives." << tcu::TestLog::EndMessage; |
|
subPixelBits = 16; |
|
} |
|
|
|
// generate coverage map |
|
|
|
tcu::clear(coverageMap.getAccess(), tcu::IVec4(COVERAGE_NONE, 0, 0, 0)); |
|
|
|
for (int triNdx = 0; triNdx < (int)scene.triangles.size(); ++triNdx) |
|
{ |
|
const tcu::IVec4 aabb = getTriangleAABB(scene.triangles[triNdx], viewportSize); |
|
|
|
for (int y = de::max(0, aabb.y()); y <= de::min(aabb.w(), coverageMap.getHeight() - 1); ++y) |
|
for (int x = de::max(0, aabb.x()); x <= de::min(aabb.z(), coverageMap.getWidth() - 1); ++x) |
|
{ |
|
if (coverageMap.getAccess().getPixelUint(x, y).x() == COVERAGE_FULL) |
|
continue; |
|
|
|
const CoverageType coverage = calculateTriangleCoverage(scene.triangles[triNdx].positions[0], |
|
scene.triangles[triNdx].positions[1], |
|
scene.triangles[triNdx].positions[2], |
|
tcu::IVec2(x, y), |
|
viewportSize, |
|
subPixelBits, |
|
multisampled); |
|
|
|
if (coverage == COVERAGE_FULL) |
|
{ |
|
coverageMap.getAccess().setPixel(tcu::IVec4(COVERAGE_FULL, 0, 0, 0), x, y); |
|
} |
|
else if (coverage == COVERAGE_PARTIAL) |
|
{ |
|
CoverageType resultCoverage = COVERAGE_PARTIAL; |
|
|
|
// Sharing an edge with another triangle? |
|
// There should always be such a triangle, but the pixel in the other triangle might be |
|
// on multiple edges, some of which are not shared. In these cases the coverage cannot be determined. |
|
// Assume full coverage if the pixel is only on a shared edge in shared triangle too. |
|
if (pixelOnlyOnASharedEdge(tcu::IVec2(x, y), scene.triangles[triNdx], viewportSize)) |
|
{ |
|
bool friendFound = false; |
|
for (int friendTriNdx = 0; friendTriNdx < (int)scene.triangles.size(); ++friendTriNdx) |
|
{ |
|
if (friendTriNdx != triNdx && pixelOnlyOnASharedEdge(tcu::IVec2(x, y), scene.triangles[friendTriNdx], viewportSize)) |
|
{ |
|
friendFound = true; |
|
break; |
|
} |
|
} |
|
|
|
if (friendFound) |
|
resultCoverage = COVERAGE_FULL; |
|
} |
|
|
|
coverageMap.getAccess().setPixel(tcu::IVec4(resultCoverage, 0, 0, 0), x, y); |
|
} |
|
} |
|
} |
|
|
|
// check pixels |
|
|
|
tcu::clear(errorMask.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f)); |
|
|
|
for (int y = 0; y < surface.getHeight(); ++y) |
|
for (int x = 0; x < surface.getWidth(); ++x) |
|
{ |
|
const tcu::RGBA color = surface.getPixel(x, y); |
|
const bool imageNoCoverage = compareColors(color, backGroundColor, args.redBits, args.greenBits, args.blueBits); |
|
const bool imageFullCoverage = compareColors(color, triangleColor, args.redBits, args.greenBits, args.blueBits); |
|
CoverageType referenceCoverage = (CoverageType)coverageMap.getAccess().getPixelUint(x, y).x(); |
|
|
|
switch (referenceCoverage) |
|
{ |
|
case COVERAGE_NONE: |
|
if (!imageNoCoverage) |
|
{ |
|
// coverage where there should not be |
|
++unexpectedPixels; |
|
errorMask.setPixel(x, y, unexpectedPixelColor); |
|
} |
|
break; |
|
|
|
case COVERAGE_PARTIAL: |
|
// anything goes |
|
errorMask.setPixel(x, y, partialPixelColor); |
|
break; |
|
|
|
case COVERAGE_FULL: |
|
if (!imageFullCoverage) |
|
{ |
|
// no coverage where there should be |
|
++missingPixels; |
|
errorMask.setPixel(x, y, missingPixelColor); |
|
} |
|
else |
|
{ |
|
errorMask.setPixel(x, y, primitivePixelColor); |
|
} |
|
break; |
|
|
|
default: |
|
DE_ASSERT(false); |
|
}; |
|
} |
|
|
|
if (((mode == VERIFICATIONMODE_STRICT) && (missingPixels + unexpectedPixels > 0)) || |
|
((mode == VERIFICATIONMODE_WEAK) && (missingPixels + unexpectedPixels > weakVerificationThreshold))) |
|
{ |
|
result = false; |
|
} |
|
else |
|
{ |
|
result = true; |
|
} |
|
|
|
// Output or stash results |
|
{ |
|
VerifyTriangleGroupRasterizationLogStash* tempLogStash = (logStash == DE_NULL) ? new VerifyTriangleGroupRasterizationLogStash : logStash; |
|
|
|
tempLogStash->result = result; |
|
tempLogStash->missingPixels = missingPixels; |
|
tempLogStash->unexpectedPixels = unexpectedPixels; |
|
tempLogStash->errorMask = errorMask; |
|
|
|
if (logStash == DE_NULL) |
|
{ |
|
verifyTriangleGroupRasterizationLog(surface, log, *tempLogStash); |
|
delete tempLogStash; |
|
} |
|
} |
|
|
|
return result; |
|
} |
|
|
|
bool verifyLineGroupRasterization (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
const bool multisampled = args.numSamples != 0; |
|
|
|
if (multisampled) |
|
return verifyMultisampleLineGroupRasterization(surface, scene, args, log, CLIPMODE_NO_CLIPPING, DE_NULL); |
|
else |
|
return verifySinglesampleLineGroupRasterization(surface, scene, args, log); |
|
} |
|
|
|
bool verifyClippedTriangulatedLineGroupRasterization (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
return verifyMultisampleLineGroupRasterization(surface, scene, args, log, CLIPMODE_USE_CLIPPING_BOX, DE_NULL); |
|
} |
|
|
|
bool verifyRelaxedLineGroupRasterization (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
VerifyTriangleGroupRasterizationLogStash noClippingLogStash; |
|
VerifyTriangleGroupRasterizationLogStash useClippingLogStash; |
|
|
|
if (verifyMultisampleLineGroupRasterization(surface, scene, args, log, CLIPMODE_USE_CLIPPING_BOX, &useClippingLogStash)) |
|
{ |
|
log << tcu::TestLog::Message << "Relaxed rasterization succeeded with CLIPMODE_USE_CLIPPING_BOX, details follow." << tcu::TestLog::EndMessage; |
|
|
|
verifyTriangleGroupRasterizationLog(surface, log, useClippingLogStash); |
|
|
|
return true; |
|
} |
|
else if (verifyMultisampleLineGroupRasterization(surface, scene, args, log, CLIPMODE_NO_CLIPPING, &noClippingLogStash)) |
|
{ |
|
log << tcu::TestLog::Message << "Relaxed rasterization succeeded with CLIPMODE_NO_CLIPPING, details follow." << tcu::TestLog::EndMessage; |
|
|
|
verifyTriangleGroupRasterizationLog(surface, log, noClippingLogStash); |
|
|
|
return true; |
|
} |
|
else |
|
{ |
|
log << tcu::TestLog::Message << "Relaxed rasterization failed, details follow." << tcu::TestLog::EndMessage; |
|
|
|
verifyTriangleGroupRasterizationLog(surface, log, useClippingLogStash); |
|
verifyTriangleGroupRasterizationLog(surface, log, noClippingLogStash); |
|
|
|
return false; |
|
} |
|
} |
|
|
|
bool verifyPointGroupRasterization (const tcu::Surface& surface, const PointSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
// Splitting to triangles is a valid solution in multisampled cases and even in non-multisample cases too. |
|
return verifyMultisamplePointGroupRasterization(surface, scene, args, log); |
|
} |
|
|
|
bool verifyTriangleGroupInterpolation (const tcu::Surface& surface, const TriangleSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
return verifyTriangleGroupInterpolationWithInterpolator(surface, scene, args, log, TriangleInterpolator(scene)); |
|
} |
|
|
|
LineInterpolationMethod verifyLineGroupInterpolation (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
const bool multisampled = args.numSamples != 0; |
|
|
|
if (multisampled) |
|
{ |
|
if (verifyMultisampleLineGroupInterpolation(surface, scene, args, log)) |
|
return LINEINTERPOLATION_STRICTLY_CORRECT; |
|
return LINEINTERPOLATION_INCORRECT; |
|
} |
|
else |
|
{ |
|
const bool isNarrow = (scene.lineWidth == 1.0f); |
|
|
|
// accurate interpolation |
|
if (isNarrow) |
|
{ |
|
if (verifySinglesampleNarrowLineGroupInterpolation(surface, scene, args, log)) |
|
return LINEINTERPOLATION_STRICTLY_CORRECT; |
|
} |
|
else |
|
{ |
|
if (verifySinglesampleWideLineGroupInterpolation(surface, scene, args, log)) |
|
return LINEINTERPOLATION_STRICTLY_CORRECT; |
|
} |
|
|
|
// check with projected (inaccurate) interpolation |
|
log << tcu::TestLog::Message << "Accurate verification failed, checking with projected weights (inaccurate equation)." << tcu::TestLog::EndMessage; |
|
if (verifyLineGroupInterpolationWithProjectedWeights(surface, scene, args, log)) |
|
return LINEINTERPOLATION_PROJECTED; |
|
|
|
return LINEINTERPOLATION_INCORRECT; |
|
} |
|
} |
|
|
|
bool verifyTriangulatedLineGroupInterpolation (const tcu::Surface& surface, const LineSceneSpec& scene, const RasterizationArguments& args, tcu::TestLog& log) |
|
{ |
|
return verifyMultisampleLineGroupInterpolation(surface, scene, args, log); |
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} |
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|
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} // tcu
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|