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allow single color colorize-alpha

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This commit is contained in:
Dane Springmeyer 2013-09-27 16:11:23 -07:00
parent 70976695d8
commit 82e1b37281
7 changed files with 361 additions and 2 deletions
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2
CHANGELOG.md
View file

@ -14,6 +14,8 @@ Released ...
Summary: TODO
- Added single color argument support to `colorize-alpha` to allow colorizing alpha with one color.
- Added `color-to-alpha` `image-filter` to allow for applying alpha in proportion to color similiarity (#2023)
- Added Async support to PostGIS plugin - https://github.com/mapnik/mapnik/wiki/PostGIS-Async

25
include/mapnik/image_filter.hpp
View file

@ -482,6 +482,31 @@ void apply_filter(Src & src, colorize_alpha const& op)
{
using namespace boost::gil;
std::size_t size = op.size();
if (op.size() == 1)
{
// no interpolation if only one stop
mapnik::filter::color_stop const& stop = op[0];
mapnik::color const& c = stop.color;
rgba8_view_t src_view = rgba8_view(src);
for (int y=0; y<src_view.height(); ++y)
{
rgba8_view_t::x_iterator src_it = src_view.row_begin(y);
for (int x=0; x<src_view.width(); ++x)
{
uint8_t & r = get_color(src_it[x], red_t());
uint8_t & g = get_color(src_it[x], green_t());
uint8_t & b = get_color(src_it[x], blue_t());
uint8_t & a = get_color(src_it[x], alpha_t());
if ( a > 0)
{
r = (c.red() * a + 255) >> 8;
g = (c.green() * a + 255) >> 8;
b = (c.blue() * a + 255) >> 8;
}
}
}
}
else
if (size > 1)
{
// interpolate multiple stops

4
src/image_filter_grammar.cpp
View file

@ -115,8 +115,8 @@ image_filter_grammar<Iterator,ContType>::image_filter_grammar()
>> lit('(')
>> (css_color_[at_c<0>(_b) = _1, at_c<1>(_b) = 0]
>> -color_stop_offset(_b)) [push_back(_a,_b)]
>> +(lit(',') >> css_color_[at_c<0>(_b) =_1,at_c<1>(_b) = 0]
>> -color_stop_offset(_b))[push_back(_a,_b)]
>> -(+(lit(',') >> css_color_[at_c<0>(_b) =_1,at_c<1>(_b) = 0]
>> -color_stop_offset(_b))[push_back(_a,_b)])
>> lit(')') [push_back(_r1,_a)]
;

283
tests/visual_tests/grids/colorize-alpha3-512-512-1.0-grid-reference.json Normal file
View file

@ -0,0 +1,283 @@
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"\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5 \u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5",
"\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5\u00b5",
" ",
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}

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49
tests/visual_tests/styles/colorize-alpha4.xml Normal file
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@ -0,0 +1,49 @@
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map[]>
<Map>
<Style name="countries">
<Rule>
<PolygonSymbolizer fill-opacity=".9" gamma=".65"/>
</Rule>
</Style>
<Style name="style" image-filters="colorize-alpha(blue)">
<Rule>
<PointSymbolizer file="../../data/images/marker.png" allow-overlap="true" />
</Rule>
</Style>
<Layer name="world">
<StyleName>countries</StyleName>
<Datasource>
<Parameter name="file">../../data/shp/ne_110m_admin_0_countries.shp</Parameter>
<Parameter name="type">shape</Parameter>
</Datasource>
</Layer>
<Layer name="style">
<StyleName>style</StyleName>
<Datasource>
<Parameter name="inline">
x,y
-170,20
-122,48
-122.2,48.2
-122.2,48.2
-122.3,48.3
-122.1,48.4
-122.1,48.2
-115,36
90,30
0,0
1,1
10,10
-10,-10
-20,-20
</Parameter>
<Parameter name="type">csv</Parameter>
</Datasource>
</Layer>
</Map>