diff options
Diffstat (limited to 'community/agg/0010-Add-renderer_scanline_aa_alpha.patch')
| -rw-r--r-- | community/agg/0010-Add-renderer_scanline_aa_alpha.patch | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/community/agg/0010-Add-renderer_scanline_aa_alpha.patch b/community/agg/0010-Add-renderer_scanline_aa_alpha.patch new file mode 100644 index 000000000..b0be2583f --- /dev/null +++ b/community/agg/0010-Add-renderer_scanline_aa_alpha.patch @@ -0,0 +1,193 @@ +From 749c8cd11e9e6f81e93ae5ce19258431722b6bdf Mon Sep 17 00:00:00 2001 +From: Tom Hughes <tom@compton.nu> +Date: Sun, 19 May 2013 16:43:25 +0100 +Subject: [PATCH 10/15] Add renderer_scanline_aa_alpha + +--- + include/agg_pixfmt_rgba.h | 24 +++++++++++++- + include/agg_renderer_base.h | 28 ++++++++++++++++ + include/agg_renderer_scanline.h | 71 +++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 122 insertions(+), 1 deletion(-) + +diff --git a/include/agg_pixfmt_rgba.h b/include/agg_pixfmt_rgba.h +index 42f0a05..6c4bc37 100644 +--- a/include/agg_pixfmt_rgba.h ++++ b/include/agg_pixfmt_rgba.h +@@ -2247,7 +2247,6 @@ namespace agg + } + + +- + //-------------------------------------------------------------------- + void blend_color_vspan(int x, int y, + unsigned len, +@@ -2751,6 +2750,29 @@ namespace agg + } + + //-------------------------------------------------------------------- ++ void blend_color_hspan_alpha(int x, int y, unsigned len, ++ const color_type* colors, ++ value_type alpha, ++ const int8u* covers, ++ int8u cover) ++ { ++ value_type* p = (value_type*)m_rbuf->row_ptr(x, y, len) + (x << 2); ++ do ++ { ++ blender_type::blend_pix(m_comp_op, ++ p, ++ (colors->r * alpha + 255) >> 8, ++ (colors->g * alpha + 255) >> 8, ++ (colors->b * alpha + 255) >> 8, ++ (colors->a * alpha + 255) >> 8, ++ covers ? *covers++ : cover); ++ p += 4; ++ ++colors; ++ } ++ while(--len); ++ } ++ ++ //-------------------------------------------------------------------- + void blend_color_vspan(int x, int y, unsigned len, + const color_type* colors, + const int8u* covers, +diff --git a/include/agg_renderer_base.h b/include/agg_renderer_base.h +index 1808944..25f07c3 100644 +--- a/include/agg_renderer_base.h ++++ b/include/agg_renderer_base.h +@@ -37,6 +37,7 @@ namespace agg + public: + typedef PixelFormat pixfmt_type; + typedef typename pixfmt_type::color_type color_type; ++ typedef typename pixfmt_type::color_type::value_type value_type; + typedef typename pixfmt_type::row_data row_data; + + //-------------------------------------------------------------------- +@@ -383,6 +384,33 @@ namespace agg + } + + //-------------------------------------------------------------------- ++ void blend_color_hspan_alpha(int x, int y, int len, ++ const color_type* colors, ++ value_type alpha, ++ const cover_type* covers, ++ cover_type cover = agg::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_alpha(x, y, len, colors, alpha, covers, cover); ++ } ++ ++ //-------------------------------------------------------------------- + void blend_color_vspan(int x, int y, int len, + const color_type* colors, + const cover_type* covers, +diff --git a/include/agg_renderer_scanline.h b/include/agg_renderer_scanline.h +index c27ca60..4fcb557 100644 +--- a/include/agg_renderer_scanline.h ++++ b/include/agg_renderer_scanline.h +@@ -156,6 +156,35 @@ namespace agg + } + } + ++ //================================================render_scanline_aa_alpha ++ template<class Scanline, class BaseRenderer, ++ class SpanAllocator, class SpanGenerator> ++ void render_scanline_aa_alpha(const Scanline& sl, BaseRenderer& ren, ++ SpanAllocator& alloc, SpanGenerator& span_gen, ++ unsigned alpha) ++ { ++ int y = sl.y(); ++ ++ unsigned num_spans = sl.num_spans(); ++ typename Scanline::const_iterator span = sl.begin(); ++ for(;;) ++ { ++ int x = span->x; ++ int len = span->len; ++ const typename Scanline::cover_type* covers = span->covers; ++ ++ if(len < 0) len = -len; ++ typename BaseRenderer::color_type* colors = alloc.allocate(len); ++ span_gen.generate(colors, x, y, len); ++ ren.blend_color_hspan_alpha(x, y, len, colors, alpha, ++ (span->len < 0) ? 0 : covers, *covers); ++ ++ if(--num_spans == 0) break; ++ ++span; ++ } ++ } ++ ++ + //=====================================================render_scanlines_aa + template<class Rasterizer, class Scanline, class BaseRenderer, + class SpanAllocator, class SpanGenerator> +@@ -216,8 +245,50 @@ namespace agg + }; + + ++ //==============================================renderer_scanline_aa_alpha ++ template<class BaseRenderer, class SpanAllocator, class SpanGenerator> ++ class renderer_scanline_aa_alpha ++ { ++ public: ++ typedef BaseRenderer base_ren_type; ++ typedef SpanAllocator alloc_type; ++ typedef SpanGenerator span_gen_type; + ++ //-------------------------------------------------------------------- ++ renderer_scanline_aa_alpha() : m_ren(0), m_alloc(0), m_span_gen(0), m_alpha(1.0) {} ++ renderer_scanline_aa_alpha(base_ren_type& ren, ++ alloc_type& alloc, ++ span_gen_type& span_gen, ++ unsigned alpha) : ++ m_ren(&ren), ++ m_alloc(&alloc), ++ m_span_gen(&span_gen), ++ m_alpha(alpha) ++ {} ++ void attach(base_ren_type& ren, ++ alloc_type& alloc, ++ span_gen_type& span_gen) ++ { ++ m_ren = &ren; ++ m_alloc = &alloc; ++ m_span_gen = &span_gen; ++ } + ++ //-------------------------------------------------------------------- ++ void prepare() { m_span_gen->prepare(); } ++ ++ //-------------------------------------------------------------------- ++ template<class Scanline> void render(const Scanline& sl) ++ { ++ render_scanline_aa_alpha(sl, *m_ren, *m_alloc, *m_span_gen, m_alpha); ++ } ++ ++ private: ++ base_ren_type* m_ren; ++ alloc_type* m_alloc; ++ span_gen_type* m_span_gen; ++ unsigned m_alpha; ++ }; + + + //===============================================render_scanline_bin_solid +-- +1.8.1.4 + |