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Break canvas C++ code into smaller pieces (celiagg#101)
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| // The MIT License (MIT) | ||
| // | ||
| // Copyright (c) 2014-2015 WUSTL ZPLAB | ||
| // Copyright (c) 2016-2021 Celiagg Contributors | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
| // | ||
| // Authors: Erik Hvatum <[email protected]> | ||
| // John Wiggins | ||
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| // NOTE: The renderer object constructed here keeps pointers to objects which | ||
| // are allocated on the stack, so in order to avoid code duplication, we get | ||
| // this funky macro... | ||
| #define _WITH_MASKED_RENDERER(gs, name) \ | ||
| Image* stencil = const_cast<Image*>(gs.stencil());\ | ||
| agg::rendering_buffer& stencilbuf = stencil->get_buffer();\ | ||
| alpha_mask_t stencil_mask(stencilbuf);\ | ||
| masked_pxfmt_t masked_pixfmt(m_pixfmt, stencil_mask);\ | ||
| masked_renderer_t name(masked_pixfmt); | ||
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| template<typename pixfmt_t> | ||
| canvas<pixfmt_t>::canvas(unsigned char* buf, | ||
| const unsigned width, const unsigned height, const int stride, | ||
| const size_t channel_count, FontCache& cache, const bool bottom_up) | ||
| : m_channel_count(channel_count) | ||
| , m_font_cache(cache) | ||
| , m_renbuf(buf, width, height, bottom_up ? -stride : stride) | ||
| , m_pixfmt(m_renbuf) | ||
| , m_renderer(m_pixfmt) | ||
| , m_bottom_up(bottom_up) | ||
| { | ||
| } | ||
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| template<typename pixfmt_t> | ||
| const size_t canvas<pixfmt_t>::channel_count() const | ||
| { | ||
| // typedef typename pixfmt_t::order_type T; | ||
| // return T::N; | ||
| // Something like the above should work, but the cop-out of just storing channel count | ||
| // ourselves definitely works. | ||
| return m_channel_count; | ||
| } | ||
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| template<typename pixfmt_t> | ||
| unsigned canvas<pixfmt_t>::width() const | ||
| { | ||
| return m_renbuf.width(); | ||
| } | ||
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| template<typename pixfmt_t> | ||
| unsigned canvas<pixfmt_t>::height() const | ||
| { | ||
| return m_renbuf.height(); | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::clear(const double r, const double g, | ||
| const double b, const double a) | ||
| { | ||
| typename pixfmt_t::color_type c(agg::rgba(r, g, b, a)); | ||
| m_renderer.clear(c); | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::draw_image(Image& img, | ||
| const agg::trans_affine& transform, const GraphicsState& gs) | ||
| { | ||
| _set_clipping(gs.clip_box()); | ||
| // XXX: Apply master alpha here somehow! | ||
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| if (gs.stencil() == NULL) | ||
| { | ||
| _draw_image_internal<renderer_t>(img, transform, gs, m_renderer); | ||
| } | ||
| else | ||
| { | ||
| _WITH_MASKED_RENDERER(gs, renderer) | ||
| _draw_image_internal<masked_renderer_t>(img, transform, gs, renderer); | ||
| } | ||
| } | ||
|
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::draw_shape(VertexSource& shape, | ||
| const agg::trans_affine& transform, Paint& linePaint, Paint& fillPaint, | ||
| const GraphicsState& gs) | ||
| { | ||
| _set_clipping(gs.clip_box()); | ||
| linePaint.master_alpha(gs.master_alpha()); | ||
| fillPaint.master_alpha(gs.master_alpha()); | ||
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| if (gs.stencil() == NULL) | ||
| { | ||
| _draw_shape_internal(shape, transform, linePaint, fillPaint, gs, m_renderer); | ||
| } | ||
| else | ||
| { | ||
| _WITH_MASKED_RENDERER(gs, renderer) | ||
| _draw_shape_internal(shape, transform, linePaint, fillPaint, gs, renderer); | ||
| } | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::draw_shape_at_points(VertexSource& shape, | ||
| const double* points, const size_t point_count, | ||
| const agg::trans_affine& transform, Paint& linePaint, Paint& fillPaint, | ||
| const GraphicsState& gs) | ||
| { | ||
| agg::simple_polygon_vertex_source _points(points, point_count, false, false); | ||
| agg::trans_affine pt_trans; | ||
| unsigned cmd; | ||
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| _set_clipping(gs.clip_box()); | ||
| linePaint.master_alpha(gs.master_alpha()); | ||
| fillPaint.master_alpha(gs.master_alpha()); | ||
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| if (gs.stencil() == NULL) | ||
| { | ||
| for (;;) | ||
| { | ||
| cmd = _points.vertex(&pt_trans.tx, &pt_trans.ty); | ||
| if (cmd == agg::path_cmd_end_poly) break; | ||
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| _draw_shape_internal(shape, pt_trans * transform, linePaint, fillPaint, gs, m_renderer); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| _WITH_MASKED_RENDERER(gs, renderer) | ||
| for (;;) | ||
| { | ||
| cmd = _points.vertex(&pt_trans.tx, &pt_trans.ty); | ||
| if (cmd == agg::path_cmd_end_poly) break; | ||
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| _draw_shape_internal(shape, pt_trans * transform, linePaint, fillPaint, gs, renderer); | ||
| } | ||
| } | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::draw_text(const char* text, | ||
| Font& font, const agg::trans_affine& transform, | ||
| Paint& linePaint, Paint& fillPaint, const GraphicsState& gs) | ||
| { | ||
| _set_clipping(gs.clip_box()); | ||
| linePaint.master_alpha(gs.master_alpha()); | ||
| fillPaint.master_alpha(gs.master_alpha()); | ||
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| if (gs.stencil() == NULL) | ||
| { | ||
| _draw_text_internal(text, font, transform, linePaint, fillPaint, gs, m_renderer); | ||
| } | ||
| else | ||
| { | ||
| _WITH_MASKED_RENDERER(gs, renderer) | ||
| _draw_text_internal(text, font, transform, linePaint, fillPaint, gs, renderer); | ||
| } | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::_set_aa(const bool& aa) | ||
| { | ||
| if(aa) | ||
| { | ||
| m_rasterizer.gamma(agg::gamma_linear()); | ||
| } | ||
| else | ||
| { | ||
| m_rasterizer.gamma(agg::gamma_threshold(0.5)); | ||
| } | ||
| } | ||
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| template<typename pixfmt_t> | ||
| void canvas<pixfmt_t>::_set_clipping(const GraphicsState::Rect& rect) | ||
| { | ||
| if (rect.is_valid()) | ||
| { | ||
| m_rasterizer.clip_box(rect.x1, rect.y1, rect.x2, rect.y2); | ||
| } | ||
| else | ||
| { | ||
| m_rasterizer.reset_clipping(); | ||
| } | ||
| } |
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