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145 lines
3.5 KiB
145 lines
3.5 KiB
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//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.3 |
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
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// |
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// Permission to copy, use, modify, sell and distribute this software |
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// is granted provided this copyright notice appears in all copies. |
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// This software is provided "as is" without express or implied |
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// warranty, and with no claim as to its suitability for any purpose. |
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// |
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//---------------------------------------------------------------------------- |
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// Contact: mcseem@antigrain.com |
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// mcseemagg@yahoo.com |
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// http://www.antigrain.com |
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//---------------------------------------------------------------------------- |
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// |
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// class rendering_buffer |
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// |
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//---------------------------------------------------------------------------- |
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#ifndef AGG_RENDERING_BUFFER_INCLUDED |
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#define AGG_RENDERING_BUFFER_INCLUDED |
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#include "agg_basics.h" |
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namespace agg |
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{ |
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class rendering_buffer |
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{ |
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public: |
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struct row_data { |
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int x1, x2; |
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const int8u* ptr; |
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row_data() {} |
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row_data(int x1_, int x2_, const int8u* ptr_) : |
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x1(x1_), x2(x2_), ptr(ptr_) {} |
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}; |
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struct span_data { |
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int x; |
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unsigned len; |
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int8u* ptr; |
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span_data() {} |
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span_data(int) : x(0), len(0), ptr(0) {} |
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span_data(int x_, unsigned len_, int8u* ptr_) : |
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x(x_), len(len_), ptr(ptr_) {} |
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}; |
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~rendering_buffer() |
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{ |
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FX_Free(m_rows); |
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} |
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rendering_buffer() : |
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m_buf(0), |
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m_rows(0), |
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m_width(0), |
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m_height(0), |
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m_stride(0), |
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m_max_height(0) |
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{ |
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} |
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rendering_buffer(int8u* buf, unsigned width, unsigned height, int stride) : |
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m_buf(0), |
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m_rows(0), |
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m_width(0), |
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m_height(0), |
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m_stride(0), |
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m_max_height(0) |
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{ |
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attach(buf, width, height, stride); |
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} |
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void attach(int8u* buf, unsigned width, unsigned height, int stride) |
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{ |
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m_buf = buf; |
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m_width = width; |
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m_height = height; |
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m_stride = stride; |
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if(height > m_max_height) { |
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FX_Free(m_rows); |
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m_rows = FX_Alloc(int8u*, m_max_height = height); |
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} |
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int8u* row_ptr = m_buf; |
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if(stride < 0) { |
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row_ptr = m_buf - int(height - 1) * stride; |
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} |
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int8u** rows = m_rows; |
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while(height--) { |
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*rows++ = row_ptr; |
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row_ptr += stride; |
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} |
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} |
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int8u* buf() |
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{ |
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return m_buf; |
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} |
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const int8u* buf() const |
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{ |
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return m_buf; |
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} |
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unsigned width() const |
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{ |
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return m_width; |
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} |
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unsigned height() const |
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{ |
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return m_height; |
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} |
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int stride() const |
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{ |
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return m_stride; |
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} |
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unsigned stride_abs() const |
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{ |
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return (m_stride < 0) ? |
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unsigned(-m_stride) : |
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unsigned(m_stride); |
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} |
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int8u* row(unsigned y) |
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{ |
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return m_rows[y]; |
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} |
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const int8u* row(unsigned y) const |
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{ |
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return m_rows[y]; |
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} |
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int8u* next_row(void* p) |
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{ |
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return (int8u*)p + m_stride; |
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} |
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const int8u* next_row(const void* p) const |
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{ |
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return (int8u*)p + m_stride; |
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} |
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int8u const* const* rows() const |
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{ |
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return m_rows; |
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} |
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private: |
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rendering_buffer(const rendering_buffer&); |
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const rendering_buffer& operator = (const rendering_buffer&); |
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private: |
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int8u* m_buf; |
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int8u** m_rows; |
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unsigned m_width; |
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unsigned m_height; |
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int m_stride; |
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unsigned m_max_height; |
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}; |
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} |
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#endif
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