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+ add remaining compositing modes

Browse source 
(http://www.w3.org/TR/2009/WD-SVGCompositing-20090430/)
  FIXME: move compositing into core lib
This commit is contained in:
Artem Pavlenko 2011-07-13 13:23:18 +00:00
parent 4049b74923
commit 8bfd5956bc
1 changed files with 116 additions and 2 deletions
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118
bindings/python/mapnik_image.cpp
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@ -114,6 +114,9 @@ void blend (image_32 & im, unsigned x, unsigned y, image_32 const& im2, float op
im.set_rectangle_alpha2(im2.data(),x,y,opacity);
}
// Compositing modes
// http://www.w3.org/TR/2009/WD-SVGCompositing-20090430/
enum composite_mode_e
{
clear = 1,
@ -125,7 +128,25 @@ enum composite_mode_e
dst_in,
src_out,
dst_out,
multiply
src_atop,
dst_atop,
_xor,
plus,
minus,
multiply,
screen,
overlay,
darken,
lighten,
color_dodge,
color_burn,
hard_light,
soft_light,
difference,
exclusion,
contrast,
invert,
invert_rgb
};
void composite(image_32 & im, image_32 & im2, composite_mode_e mode)
@ -139,14 +160,29 @@ void composite(image_32 & im, image_32 & im2, composite_mode_e mode)
typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
typedef agg::renderer_base<pixfmt_type> renderer_type;
agg::rendering_buffer source(im.raw_data(),im.width(),im.height(),im.width() * 4);
agg::rendering_buffer mask(im2.raw_data(),im2.width(),im2.height(),im2.width() * 4);
agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf(source);
agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf_mask(mask);
switch(mode)
{
case clear :
pixf.comp_op(agg::comp_op_clear);
break;
case src:
pixf.comp_op(agg::comp_op_src);
break;
case dst:
pixf.comp_op(agg::comp_op_dst);
break;
case src_over:
pixf.comp_op(agg::comp_op_src_over);
break;
case dst_over:
pixf.comp_op(agg::comp_op_dst_over);
break;
case src_in:
pixf.comp_op(agg::comp_op_src_in);
break;
@ -159,11 +195,66 @@ void composite(image_32 & im, image_32 & im2, composite_mode_e mode)
case dst_out:
pixf.comp_op(agg::comp_op_dst_out);
break;
case src_atop:
pixf.comp_op(agg::comp_op_src_atop);
break;
case dst_atop:
pixf.comp_op(agg::comp_op_dst_atop);
break;
case _xor:
pixf.comp_op(agg::comp_op_xor);
break;
case plus:
pixf.comp_op(agg::comp_op_plus);
break;
case minus:
pixf.comp_op(agg::comp_op_minus);
break;
case multiply:
pixf.comp_op(agg::comp_op_multiply);
break;
case screen:
pixf.comp_op(agg::comp_op_screen);
break;
case overlay:
pixf.comp_op(agg::comp_op_overlay);
break;
case darken:
pixf.comp_op(agg::comp_op_darken);
break;
case lighten:
pixf.comp_op(agg::comp_op_lighten);
break;
case color_dodge:
pixf.comp_op(agg::comp_op_color_dodge);
break;
case color_burn:
pixf.comp_op(agg::comp_op_color_burn);
break;
case hard_light:
pixf.comp_op(agg::comp_op_hard_light);
break;
case soft_light:
pixf.comp_op(agg::comp_op_soft_light);
break;
case difference:
pixf.comp_op(agg::comp_op_difference);
break;
case exclusion:
pixf.comp_op(agg::comp_op_exclusion);
break;
case contrast:
pixf.comp_op(agg::comp_op_contrast);
break;
case invert:
pixf.comp_op(agg::comp_op_invert);
break;
case invert_rgb:
pixf.comp_op(agg::comp_op_invert_rgb);
break;
default:
break;
}
renderer_type ren(pixf);
agg::renderer_base<pixfmt_type> rb(pixf);
@ -183,11 +274,34 @@ void export_image()
{
using namespace boost::python;
enum_<composite_mode_e>("CompositeOp")
.value("clear",clear)
.value("src",src)
.value("dst",dst)
.value("src_over",src_over)
.value("dst_over",dst_over)
.value("src_in",src_in)
.value("dst_in",dst_in)
.value("src_out",src_out)
.value("dst_out",dst_out)
.value("src_atop",src_atop)
.value("dst_atop",dst_atop)
.value("xor",_xor)
.value("plus",plus)
.value("minus",minus)
.value("multiply",multiply)
.value("screen",screen)
.value("overlay",overlay)
.value("darken",darken)
.value("lighten",lighten)
.value("color_dodge",color_dodge)
.value("color_burn",color_burn)
.value("hard_light",hard_light)
.value("soft_light",soft_light)
.value("difference",difference)
.value("exclusion",exclusion)
.value("contrast",contrast)
.value("invert",invert)
.value("invert_rgb",invert_rgb)
;
class_<image_32,boost::shared_ptr<image_32> >("Image","This class represents a 32 bit RGBA image.",init<int,int>())