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Diffstat (limited to 'agg/inc/agg_renderer_base.h')
| -rwxr-xr-x | agg/inc/agg_renderer_base.h | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/agg/inc/agg_renderer_base.h b/agg/inc/agg_renderer_base.h new file mode 100755 index 000000000000..1ef44fecc6d2 --- /dev/null +++ b/agg/inc/agg_renderer_base.h @@ -0,0 +1,618 @@ +//---------------------------------------------------------------------------- +// 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 agg +{ + + //-----------------------------------------------------------renderer_base + template<class PixelFormat> class renderer_base + { + public: + typedef PixelFormat pixfmt_type; + typedef typename pixfmt_type::color_type color_type; + + //-------------------------------------------------------------------- + renderer_base(pixfmt_type& _ren) : + m_ren(&_ren), + m_clip_box(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(); } + + //-------------------------------------------------------------------- + bool clip_box(int x1, int y1, int x2, int y2) + { + rect cb(x1, y1, x2, y2); + cb.normalize(); + if(cb.clip(rect(0, 0, width() - 1, height() - 1))) + { + m_clip_box = cb; + return true; + } + m_clip_box.x1 = 1; + m_clip_box.y1 = 1; + m_clip_box.x2 = 0; + m_clip_box.y2 = 0; + return false; + } + + //-------------------------------------------------------------------- + void reset_clipping(bool visibility) + { + if(visibility) + { + m_clip_box.x1 = 0; + m_clip_box.y1 = 0; + m_clip_box.x2 = width() - 1; + m_clip_box.y2 = height() - 1; + } + else + { + m_clip_box.x1 = 1; + m_clip_box.y1 = 1; + m_clip_box.x2 = 0; + m_clip_box.y2 = 0; + } + } + + //-------------------------------------------------------------------- + void clip_box_naked(int x1, int y1, int x2, int y2) + { + m_clip_box.x1 = x1; + m_clip_box.y1 = y1; + m_clip_box.x2 = x2; + m_clip_box.y2 = y2; + } + + //-------------------------------------------------------------------- + bool inbox(int x, int y) const + { + return x >= m_clip_box.x1 && y >= m_clip_box.y1 && + x <= m_clip_box.x2 && y <= m_clip_box.y2; + } + + //-------------------------------------------------------------------- + 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 clear(const color_type& c) + { + unsigned y; + if(width()) + { + for(y = 0; y < height(); y++) + { + m_ren->copy_hline(0, y, width(), c); + } + } + } + + //-------------------------------------------------------------------- + void copy_pixel(int x, int y, const color_type& c) + { + if(inbox(x, y)) + { + m_ren->copy_pixel(x, y, c); + } + } + + //-------------------------------------------------------------------- + void blend_pixel(int x, int y, const color_type& c, cover_type cover) + { + if(inbox(x, y)) + { + m_ren->blend_pixel(x, y, c, cover); + } + } + + //-------------------------------------------------------------------- + color_type pixel(int x, int y) const + { + return inbox(x, y) ? + m_ren->pixel(x, y) : + color_type::no_color(); + } + + //-------------------------------------------------------------------- + void copy_hline(int x1, int y, int x2, const color_type& c) + { + 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->copy_hline(x1, y, x2 - x1 + 1, c); + } + + //-------------------------------------------------------------------- + void copy_vline(int x, int y1, int y2, const color_type& c) + { + if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } + if(x > xmax()) return; + if(x < xmin()) return; + if(y1 > ymax()) return; + if(y2 < ymin()) return; + + if(y1 < ymin()) y1 = ymin(); + if(y2 > ymax()) y2 = ymax(); + + m_ren->copy_vline(x, y1, y2 - y1 + 1, c); + } + + //-------------------------------------------------------------------- + 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_vline(int x, int y1, int y2, + const color_type& c, cover_type cover) + { + if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } + if(x > xmax()) return; + if(x < xmin()) return; + if(y1 > ymax()) return; + if(y2 < ymin()) return; + + if(y1 < ymin()) y1 = ymin(); + if(y2 > ymax()) y2 = ymax(); + + m_ren->blend_vline(x, y1, y2 - y1 + 1, c, cover); + } + + + //-------------------------------------------------------------------- + void copy_bar(int x1, int y1, int x2, int y2, const color_type& c) + { + rect rc(x1, y1, x2, y2); + rc.normalize(); + if(rc.clip(clip_box())) + { + int y; + for(y = rc.y1; y <= rc.y2; y++) + { + m_ren->copy_hline(rc.x1, y, unsigned(rc.x2 - rc.x1 + 1), c); + } + } + } + + //-------------------------------------------------------------------- + void blend_bar(int x1, int y1, int x2, int y2, + const color_type& c, cover_type cover) + { + rect rc(x1, y1, x2, y2); + rc.normalize(); + if(rc.clip(clip_box())) + { + int y; + for(y = rc.y1; y <= rc.y2; y++) + { + m_ren->blend_hline(rc.x1, + y, + unsigned(rc.x2 - rc.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); + } + + //-------------------------------------------------------------------- + void blend_solid_vspan(int x, int y, int len, + const color_type& c, + const cover_type* covers) + { + if(x > xmax()) return; + if(x < xmin()) return; + + if(y < ymin()) + { + len -= ymin() - y; + if(len <= 0) return; + covers += ymin() - y; + y = ymin(); + } + if(y + len > ymax()) + { + len = ymax() - y + 1; + if(len <= 0) return; + } + m_ren->blend_solid_vspan(x, y, len, c, covers); + } + + //-------------------------------------------------------------------- + void blend_color_hspan(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + if(y > ymax()) return; + if(y < ymin()) return; + + if(x < xmin()) + { + int d = xmin() - x; + len -= d; + if(len <= 0) return; + if(covers) covers += d; + colors += d; + x = xmin(); + } + if(x + len > xmax()) + { + len = xmax() - x + 1; + if(len <= 0) return; + } + m_ren->blend_color_hspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + void blend_color_vspan(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + if(x > xmax()) return; + if(x < xmin()) return; + + if(y < ymin()) + { + int d = ymin() - y; + len -= d; + if(len <= 0) return; + if(covers) covers += d; + colors += d; + y = ymin(); + } + if(y + len > ymax()) + { + len = ymax() - y + 1; + if(len <= 0) return; + } + m_ren->blend_color_vspan(x, y, len, colors, covers, cover); + } + + + //-------------------------------------------------------------------- + void blend_opaque_color_hspan(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + if(y > ymax()) return; + if(y < ymin()) return; + + if(x < xmin()) + { + int d = xmin() - x; + len -= d; + if(len <= 0) return; + if(covers) covers += d; + colors += d; + x = xmin(); + } + if(x + len > xmax()) + { + len = xmax() - x + 1; + if(len <= 0) return; + } + m_ren->blend_opaque_color_hspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + void blend_opaque_color_vspan(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + if(x > xmax()) return; + if(x < xmin()) return; + + if(y < ymin()) + { + int d = ymin() - y; + len -= d; + if(len <= 0) return; + if(covers) covers += d; + colors += d; + y = ymin(); + } + if(y + len > ymax()) + { + len = ymax() - y + 1; + if(len <= 0) return; + } + m_ren->blend_opaque_color_vspan(x, y, len, colors, covers, cover); + } + + + //-------------------------------------------------------------------- + void blend_color_hspan_no_clip(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + m_ren->blend_color_hspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + void blend_color_vspan_no_clip(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + m_ren->blend_color_vspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + void blend_opaque_color_hspan_no_clip(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + m_ren->blend_opaque_color_hspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + void blend_opaque_color_vspan_no_clip(int x, int y, int len, + const color_type* colors, + const cover_type* covers, + cover_type cover = cover_full) + { + m_ren->blend_opaque_color_vspan(x, y, len, colors, covers, cover); + } + + //-------------------------------------------------------------------- + rect clip_rect_area(rect& dst, rect& src, int wsrc, int hsrc) const + { + rect rc(0,0,0,0); + rect cb = clip_box(); + ++cb.x2; + ++cb.y2; + + if(src.x1 < 0) + { + dst.x1 -= src.x1; + src.x1 = 0; + } + if(src.y1 < 0) + { + dst.y1 -= src.y1; + src.y1 = 0; + } + + if(src.x2 > wsrc) src.x2 = wsrc; + if(src.y2 > hsrc) src.y2 = hsrc; + + if(dst.x1 < cb.x1) + { + src.x1 += cb.x1 - dst.x1; + dst.x1 = cb.x1; + } + if(dst.y1 < cb.y1) + { + src.y1 += cb.y1 - dst.y1; + dst.y1 = cb.y1; + } + + if(dst.x2 > cb.x2) dst.x2 = cb.x2; + if(dst.y2 > cb.y2) dst.y2 = cb.y2; + + rc.x2 = dst.x2 - dst.x1; + rc.y2 = dst.y2 - dst.y1; + + if(rc.x2 > src.x2 - src.x1) rc.x2 = src.x2 - src.x1; + if(rc.y2 > src.y2 - src.y1) rc.y2 = src.y2 - src.y1; + return rc; + } + + + //-------------------------------------------------------------------- + void copy_from(const rendering_buffer& src, + const rect* rect_src_ptr = 0, + int dx = 0, + int dy = 0) + { + rect rsrc(0, 0, src.width(), src.height()); + if(rect_src_ptr) + { + rsrc.x1 = rect_src_ptr->x1; + rsrc.y1 = rect_src_ptr->y1; + rsrc.x2 = rect_src_ptr->x2 + 1; + rsrc.y2 = rect_src_ptr->y2 + 1; + } + + // Version with xdst, ydst (absolute positioning) + //rect rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); + + // Version with dx, dy (relative positioning) + rect rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); + + rect rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); + + if(rc.x2 > 0) + { + int incy = 1; + if(rdst.y1 > rsrc.y1) + { + rsrc.y1 += rc.y2 - 1; + rdst.y1 += rc.y2 - 1; + incy = -1; + } + while(rc.y2 > 0) + { + m_ren->copy_from(src, + rdst.x1, rdst.y1, + rsrc.x1, rsrc.y1, + rc.x2); + rdst.y1 += incy; + rsrc.y1 += incy; + --rc.y2; + } + } + } + + + + //-------------------------------------------------------------------- + template<class SrcPixelFormatRenderer> + void blend_from(const SrcPixelFormatRenderer& src, + const rect* rect_src_ptr = 0, + int dx = 0, + int dy = 0) + { + rect rsrc(0, 0, src.width(), src.height()); + if(rect_src_ptr) + { + rsrc.x1 = rect_src_ptr->x1; + rsrc.y1 = rect_src_ptr->y1; + rsrc.x2 = rect_src_ptr->x2 + 1; + rsrc.y2 = rect_src_ptr->y2 + 1; + } + + // Version with xdst, ydst (absolute positioning) + //rect rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); + + // Version with dx, dy (relative positioning) + rect rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); + + rect rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); + + if(rc.x2 > 0) + { + int incy = 1; + if(rdst.y1 > rsrc.y1) + { + rsrc.y1 += rc.y2 - 1; + rdst.y1 += rc.y2 - 1; + incy = -1; + } + while(rc.y2 > 0) + { + typename SrcPixelFormatRenderer::row_data span = src.span(rsrc.x1, rsrc.y1); + if(span.ptr) + { + int x1src = rsrc.x1; + int x1dst = rdst.x1; + int len = rc.x2; + if(span.x1 > x1src) + { + x1dst += span.x1 - x1src; + len -= span.x1 - x1src; + x1src = span.x1; + } + if(len > 0) + { + if(x1src + len-1 > span.x2) + { + len -= x1src + len - span.x2 - 1; + } + if(len > 0) + { + m_ren->blend_from(src, span.ptr, + x1dst, rdst.y1, + x1src, rsrc.y1, + len); + } + } + } + rdst.y1 += incy; + rsrc.y1 += incy; + --rc.y2; + } + } + } + + + + private: + pixfmt_type* m_ren; + rect m_clip_box; + }; + + +} + +#endif |