| |
| //---------------------------------------------------------------------------- |
| // 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 renderer_base |
| // |
| //---------------------------------------------------------------------------- |
| #ifndef AGG_RENDERER_BASE_INCLUDED |
| #define AGG_RENDERER_BASE_INCLUDED |
| #include "agg_basics.h" |
| #include "agg_rendering_buffer.h" |
| namespace pdfium |
| { |
| namespace agg |
| { |
| template<class PixelFormat> class renderer_base |
| { |
| public: |
| typedef PixelFormat pixfmt_type; |
| typedef typename pixfmt_type::color_type color_type; |
| typedef typename pixfmt_type::row_data row_data; |
| typedef typename pixfmt_type::span_data span_data; |
| renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {} |
| renderer_base(pixfmt_type& ren) : |
| m_ren(&ren), |
| m_clip_box(0, 0, ren.width() - 1, ren.height() - 1) |
| {} |
| void attach(pixfmt_type& ren) |
| { |
| m_ren = &ren; |
| m_clip_box = rect(0, 0, ren.width() - 1, ren.height() - 1); |
| } |
| const pixfmt_type& ren() const |
| { |
| return *m_ren; |
| } |
| pixfmt_type& ren() |
| { |
| return *m_ren; |
| } |
| unsigned width() const |
| { |
| return m_ren->width(); |
| } |
| unsigned height() const |
| { |
| return m_ren->height(); |
| } |
| void first_clip_box() {} |
| bool next_clip_box() |
| { |
| return false; |
| } |
| const rect& clip_box() const |
| { |
| return m_clip_box; |
| } |
| int xmin() const |
| { |
| return m_clip_box.x1; |
| } |
| int ymin() const |
| { |
| return m_clip_box.y1; |
| } |
| int xmax() const |
| { |
| return m_clip_box.x2; |
| } |
| int ymax() const |
| { |
| return m_clip_box.y2; |
| } |
| const rect& bounding_clip_box() const |
| { |
| return m_clip_box; |
| } |
| int bounding_xmin() const |
| { |
| return m_clip_box.x1; |
| } |
| int bounding_ymin() const |
| { |
| return m_clip_box.y1; |
| } |
| int bounding_xmax() const |
| { |
| return m_clip_box.x2; |
| } |
| int bounding_ymax() const |
| { |
| return m_clip_box.y2; |
| } |
| void blend_hline(int x1, int y, int x2, |
| const color_type& c, cover_type cover) |
| { |
| if(x1 > x2) { |
| int t = x2; |
| x2 = x1; |
| x1 = t; |
| } |
| if(y > ymax()) { |
| return; |
| } |
| if(y < ymin()) { |
| return; |
| } |
| if(x1 > xmax()) { |
| return; |
| } |
| if(x2 < xmin()) { |
| return; |
| } |
| if(x1 < xmin()) { |
| x1 = xmin(); |
| } |
| if(x2 > xmax()) { |
| x2 = xmax(); |
| } |
| m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover); |
| } |
| void blend_solid_hspan(int x, int y, int len, |
| const color_type& c, |
| const cover_type* covers) |
| { |
| if(y > ymax()) { |
| return; |
| } |
| if(y < ymin()) { |
| return; |
| } |
| if(x < xmin()) { |
| len -= xmin() - x; |
| if(len <= 0) { |
| return; |
| } |
| covers += xmin() - x; |
| x = xmin(); |
| } |
| if(x + len > xmax()) { |
| len = xmax() - x + 1; |
| if(len <= 0) { |
| return; |
| } |
| } |
| m_ren->blend_solid_hspan(x, y, len, c, covers); |
| } |
| private: |
| pixfmt_type* m_ren; |
| rect m_clip_box; |
| }; |
| } |
| } // namespace pdfium |
| #endif |
