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111 lines
3.5 KiB
111 lines
3.5 KiB
/* |
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* Copyright 2011 Google Inc. |
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* |
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* Use of this source code is governed by a BSD-style license that can be |
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* found in the LICENSE file. |
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*/ |
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#include "Sample.h" |
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#include "SkBlurMaskFilter.h" |
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#include "SkCanvas.h" |
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#include "SkColorFilter.h" |
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#include "SkColorPriv.h" |
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#include "SkColorShader.h" |
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#include "SkGradientShader.h" |
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#include "SkGraphics.h" |
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#include "SkOSFile.h" |
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#include "SkPath.h" |
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#include "SkRandom.h" |
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#include "SkRegion.h" |
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#include "SkShader.h" |
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#include "SkShaper.h" |
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#include "SkStream.h" |
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#include "SkTextBlob.h" |
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#include "SkTime.h" |
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#include "SkTypeface.h" |
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#include "SkUTF.h" |
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extern void skia_set_text_gamma(float blackGamma, float whiteGamma); |
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#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI) |
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extern SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&); |
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#endif |
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static const char gText[] = |
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"When in the Course of human events it becomes necessary for one people " |
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"to dissolve the political bands which have connected them with another " |
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"and to assume among the powers of the earth, the separate and equal " |
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"station to which the Laws of Nature and of Nature's God entitle them, " |
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"a decent respect to the opinions of mankind requires that they should " |
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"declare the causes which impel them to the separation."; |
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class TextBoxView : public Sample { |
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public: |
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TextBoxView() { |
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#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI) |
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LOGFONT lf; |
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sk_bzero(&lf, sizeof(lf)); |
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lf.lfHeight = 9; |
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SkTypeface* tf0 = SkCreateTypefaceFromLOGFONT(lf); |
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lf.lfHeight = 12; |
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SkTypeface* tf1 = SkCreateTypefaceFromLOGFONT(lf); |
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// we assert that different sizes should not affect which face we get |
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SkASSERT(tf0 == tf1); |
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tf0->unref(); |
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tf1->unref(); |
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#endif |
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} |
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protected: |
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bool onQuery(Sample::Event* evt) override { |
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if (Sample::TitleQ(*evt)) { |
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Sample::TitleR(evt, "TextBox"); |
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return true; |
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} |
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return this->INHERITED::onQuery(evt); |
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} |
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void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) { |
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SkAutoCanvasRestore acr(canvas, true); |
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canvas->clipRect(SkRect::MakeWH(w, h)); |
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canvas->drawColor(bg); |
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SkShaper shaper(nullptr); |
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SkScalar margin = 20; |
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SkPaint paint; |
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paint.setColor(fg); |
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for (int i = 9; i < 24; i += 2) { |
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SkTextBlobBuilderRunHandler builder; |
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SkFont font(nullptr, SkIntToScalar(i)); |
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias); |
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SkPoint end = shaper.shape(&builder, font, gText, strlen(gText), true, |
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{ margin, margin }, w - margin); |
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canvas->drawTextBlob(builder.makeBlob(), 0, 0, paint); |
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canvas->translate(0, end.y()); |
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} |
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} |
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void onDrawContent(SkCanvas* canvas) override { |
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SkScalar width = this->width() / 3; |
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drawTest(canvas, width, this->height(), SK_ColorBLACK, SK_ColorWHITE); |
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canvas->translate(width, 0); |
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drawTest(canvas, width, this->height(), SK_ColorWHITE, SK_ColorBLACK); |
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canvas->translate(width, 0); |
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drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorWHITE); |
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canvas->translate(0, this->height()/2); |
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drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorBLACK); |
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} |
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private: |
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typedef Sample INHERITED; |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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DEF_SAMPLE( return new TextBoxView(); )
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