From 9df4deac73fca4c508a6f2dfd0dd03d680e8b73e Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Thu, 19 Sep 2013 19:41:46 -0700
Subject: [PATCH] consistent use of agg::rgba8_pre to construct premultiplied
 colors - refs #2011

---
 src/agg/agg_renderer.cpp                      |   2 +-
 src/agg/process_line_pattern_symbolizer.cpp   |  10 +-
 ...er-opacity-512-512-1.0-grid-reference.json | 144 ++++++++++++++++++
 ...izer-opacity-512-512-1.0-agg-reference.png | Bin 0 -> 10664 bytes
 ...izer-opacity-512-512-2.0-agg-reference.png | Bin 0 -> 10664 bytes
 .../line-pattern-symbolizer-opacity.xml       |  21 +++
 tests/visual_tests/test.py                    |   1 +
 7 files changed, 171 insertions(+), 7 deletions(-)
 create mode 100644 tests/visual_tests/grids/line-pattern-symbolizer-opacity-512-512-1.0-grid-reference.json
 create mode 100644 tests/visual_tests/images/line-pattern-symbolizer-opacity-512-512-1.0-agg-reference.png
 create mode 100644 tests/visual_tests/images/line-pattern-symbolizer-opacity-512-512-2.0-agg-reference.png
 create mode 100644 tests/visual_tests/styles/line-pattern-symbolizer-opacity.xml

diff --git a/src/agg/agg_renderer.cpp b/src/agg/agg_renderer.cpp
index 8bfd79c4a..0c3367496 100644
--- a/src/agg/agg_renderer.cpp
+++ b/src/agg/agg_renderer.cpp
@@ -455,7 +455,7 @@ void agg_renderer<T>::debug_draw_box(R& buf, box2d<double> const& box,
     // render the outline
     ras_ptr->reset();
     ras_ptr->add_path(sbox);
-    ren.color(agg::rgba8(0x33, 0x33, 0xff, 0xcc)); // blue is fine
+    ren.color(agg::rgba8_pre(0x33, 0x33, 0xff, 0xcc)); // blue is fine
     agg::render_scanlines(*ras_ptr, sl_line, ren);
 }
 
diff --git a/src/agg/process_line_pattern_symbolizer.cpp b/src/agg/process_line_pattern_symbolizer.cpp
index 80c29f421..fd18d4242 100644
--- a/src/agg/process_line_pattern_symbolizer.cpp
+++ b/src/agg/process_line_pattern_symbolizer.cpp
@@ -60,18 +60,18 @@ public:
     pattern_source(mapnik::image_data_32 const& pattern)
         : pattern_(pattern) {}
 
-    unsigned int width() const
+    inline unsigned int width() const
     {
         return pattern_.width();
     }
-    unsigned int height() const
+    inline unsigned int height() const
     {
         return pattern_.height();
     }
-    agg::rgba8 pixel(int x, int y) const
+    inline agg::rgba8 pixel(int x, int y) const
     {
         unsigned c = pattern_(x,y);
-        return agg::rgba8(c & 0xff,
+        return agg::rgba8_pre(c & 0xff,
                           (c >> 8) & 0xff,
                           (c >> 16) & 0xff,
                           (c >> 24) & 0xff);
@@ -107,12 +107,10 @@ void  agg_renderer<T>::process(line_pattern_symbolizer const& sym,
     if (!(*mark)->is_bitmap())
     {
         MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
-
         return;
     }
 
     boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
-
     if (!pat) return;
 
     agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
diff --git a/tests/visual_tests/grids/line-pattern-symbolizer-opacity-512-512-1.0-grid-reference.json b/tests/visual_tests/grids/line-pattern-symbolizer-opacity-512-512-1.0-grid-reference.json
new file mode 100644
index 000000000..1efa6d583
--- /dev/null
+++ b/tests/visual_tests/grids/line-pattern-symbolizer-opacity-512-512-1.0-grid-reference.json
@@ -0,0 +1,144 @@
+{
+ "keys": [
+  "", 
+  "4", 
+  "3", 
+  "2", 
+  "1", 
+  "8", 
+  "7", 
+  "6", 
+  "5"
+ ], 
+ "data": {}, 
+ "grid": [
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "         !!!!!!!!                         ##### #####                        $$$$$$$$$$                        %%%%%%%%%        ", 
+  "      !!          !!                   ###            ##                  $$            $$                  %%           %%     ", 
+  "    !!               !                #                 #               $$                $$              %%               %%   ", 
+  "  !!                  !!             #                   #             $$                   $            %                   %  ", 
+  "  !                    !!           #                     #           $                      $          %                     % ", 
+  " !                      !          #                       #          $                      $         %                       %", 
+  "!                        !         #                                 $                        $        %                        ", 
+  "!                        !                                  #        $                        $        %                        ", 
+  "&&&&&&&&&&&&&&&&&&&&&&&&&&            ''''''''''''''''''''''#        ((((((((((((((((((((((((((        )))))))))))))))))))))))))", 
+  "!                        !                                           $                        $        %                        ", 
+  "!                        !         #                       #         $                        $        %                       %", 
+  " !                      !          ##                      #          $                      $         %%                      %", 
+  " !!                     !           #                     #            $                    $           %                     % ", 
+  "  !!                  !!             ##                 ##              $                  $             %%                  %  ", 
+  "    !                !                 ##              #                 $$              $$               %%               %%   ", 
+  "     !!!          !!!                    ###       ###                     $$$         $$                   %%%          %%     ", 
+  "        !!!!!!!!!!                           #####                            $$$$$$$$                          %%%%%%%%        ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                ", 
+  "                                                                                                                                "
+ ]
+}
\ No newline at end of file
diff --git a/tests/visual_tests/images/line-pattern-symbolizer-opacity-512-512-1.0-agg-reference.png b/tests/visual_tests/images/line-pattern-symbolizer-opacity-512-512-1.0-agg-reference.png
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/tests/visual_tests/styles/line-pattern-symbolizer-opacity.xml b/tests/visual_tests/styles/line-pattern-symbolizer-opacity.xml
new file mode 100644
index 000000000..82a92fb2a
--- /dev/null
+++ b/tests/visual_tests/styles/line-pattern-symbolizer-opacity.xml
@@ -0,0 +1,21 @@
+<Map
+    background-color="green"
+    background-image="../../data/images/checker.jpg"
+    background-image-opacity=".5"
+    background-image-comp-op="soft-light"
+    srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
+    <Layer name="layer" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
+        <StyleName>My Style</StyleName>
+        <Datasource>
+            <Parameter name="type">csv</Parameter>
+            <Parameter name="file">../data/line-offset.csv</Parameter>
+        </Datasource>
+    </Layer>
+
+    <Style name="My Style">
+        <Rule>
+            <LinePatternSymbolizer file="../../data/raster/white-alpha.png" comp-op="difference"/>
+        </Rule>
+    </Style>
+
+</Map>
diff --git a/tests/visual_tests/test.py b/tests/visual_tests/test.py
index 38615ea48..d8676c416 100755
--- a/tests/visual_tests/test.py
+++ b/tests/visual_tests/test.py
@@ -172,6 +172,7 @@ files = {
     'marker-path-expression':{},
     'map-background-image-compositing':{'sizes':[(512,512)]},
     'building-symbolizer-opacity':{'sizes':[(512,512)]},
+    'line-pattern-symbolizer-opacity':{'sizes':[(512,512)]}
     }
 
 class Reporting: