184 lines
4.9 KiB
C++
184 lines
4.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_IMAGE_COMPOSITING_HPP
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#define MAPNIK_IMAGE_COMPOSITING_HPP
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// agg
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#include "agg_rendering_buffer.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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#include "agg_renderer_scanline.h"
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#include "agg_pixfmt_rgba.h"
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namespace mapnik
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{
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// Compositing modes
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// http://www.w3.org/TR/2009/WD-SVGCompositing-20090430/
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enum composite_mode_e
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{
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clear = 1,
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src,
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dst,
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src_over,
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dst_over,
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src_in,
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dst_in,
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src_out,
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dst_out,
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src_atop,
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dst_atop,
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_xor,
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plus,
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minus,
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multiply,
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screen,
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overlay,
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darken,
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lighten,
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color_dodge,
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color_burn,
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hard_light,
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soft_light,
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difference,
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exclusion,
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contrast,
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invert,
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invert_rgb
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};
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template <typename T1, typename T2>
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void composite(T1 & im, T2 & im2, composite_mode_e mode)
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{
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typedef agg::rgba8 color;
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typedef agg::order_bgra order;
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typedef agg::pixel32_type pixel_type;
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typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
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typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_type;
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typedef agg::renderer_base<pixfmt_type> renderer_type;
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typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
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typedef agg::renderer_base<pixfmt_type> renderer_type;
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agg::rendering_buffer source(im.getBytes(),im.width(),im.height(),im.width() * 4);
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agg::rendering_buffer mask(im2.getBytes(),im2.width(),im2.height(),im2.width() * 4);
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agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf(source);
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agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf_mask(mask);
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switch(mode)
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{
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case clear :
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pixf.comp_op(agg::comp_op_clear);
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break;
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case src:
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pixf.comp_op(agg::comp_op_src);
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break;
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case dst:
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pixf.comp_op(agg::comp_op_dst);
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break;
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case src_over:
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pixf.comp_op(agg::comp_op_src_over);
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break;
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case dst_over:
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pixf.comp_op(agg::comp_op_dst_over);
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break;
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case src_in:
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pixf.comp_op(agg::comp_op_src_in);
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break;
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case dst_in:
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pixf.comp_op(agg::comp_op_dst_in);
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break;
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case src_out:
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pixf.comp_op(agg::comp_op_src_out);
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break;
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case dst_out:
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pixf.comp_op(agg::comp_op_dst_out);
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break;
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case src_atop:
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pixf.comp_op(agg::comp_op_src_atop);
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break;
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case dst_atop:
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pixf.comp_op(agg::comp_op_dst_atop);
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break;
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case _xor:
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pixf.comp_op(agg::comp_op_xor);
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break;
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case plus:
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pixf.comp_op(agg::comp_op_plus);
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break;
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case minus:
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pixf.comp_op(agg::comp_op_minus);
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break;
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case multiply:
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pixf.comp_op(agg::comp_op_multiply);
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break;
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case screen:
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pixf.comp_op(agg::comp_op_screen);
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break;
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case overlay:
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pixf.comp_op(agg::comp_op_overlay);
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break;
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case darken:
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pixf.comp_op(agg::comp_op_darken);
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break;
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case lighten:
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pixf.comp_op(agg::comp_op_lighten);
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break;
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case color_dodge:
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pixf.comp_op(agg::comp_op_color_dodge);
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break;
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case color_burn:
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pixf.comp_op(agg::comp_op_color_burn);
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break;
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case hard_light:
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pixf.comp_op(agg::comp_op_hard_light);
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break;
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case soft_light:
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pixf.comp_op(agg::comp_op_soft_light);
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break;
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case difference:
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pixf.comp_op(agg::comp_op_difference);
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break;
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case exclusion:
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pixf.comp_op(agg::comp_op_exclusion);
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break;
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case contrast:
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pixf.comp_op(agg::comp_op_contrast);
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break;
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case invert:
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pixf.comp_op(agg::comp_op_invert);
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break;
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case invert_rgb:
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pixf.comp_op(agg::comp_op_invert_rgb);
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break;
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}
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renderer_type ren(pixf);
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agg::renderer_base<pixfmt_type> rb(pixf);
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rb.blend_from(pixf_mask,0,0,0,255);
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}
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}
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#endif // MAPNIK_IMAGE_COMPOSITING_HPP
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