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