From c1e8d3c29bde66b87e8f19bb859d074e77a9e982 Mon Sep 17 00:00:00 2001
From: Nicolas Dufour <nicoduf@yahoo.fr>
Date: Wed, 10 Aug 2011 21:39:47 +0200
Subject: Filters. New Blend, Extract Channel and Ink Blot custom predefined
 filters.

(bzr r10534)
---
 src/extension/internal/filter/bumps.h        |   3 +-
 src/extension/internal/filter/color.h        | 103 +++++++++++++++++++++++++++
 src/extension/internal/filter/filter-all.cpp |   5 +-
 src/extension/internal/filter/transparency.h |  68 ++++++++++++++++++
 4 files changed, 176 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/extension/internal/filter/bumps.h b/src/extension/internal/filter/bumps.h
index 9d46a25b2..b8617eafc 100644
--- a/src/extension/internal/filter/bumps.h
+++ b/src/extension/internal/filter/bumps.h
@@ -698,13 +698,12 @@ WaxBump::get_filter_text (Inkscape::Extension::Extension * ext)
     _filter = g_strdup_printf(
         "<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" color-interpolation-filters=\"sRGB\" inkscape:label=\"Wax Bump\">\n"
           "<feGaussianBlur in=\"SourceGraphic\" stdDeviation=\"%s\" result=\"blur1\" />\n"
-          "<feFlood in=\"SourceGraphic\" flood-opacity=\"1\" flood-color=\"rgb(0,255,255)\" result=\"flood1\" />\n"
+          "<feFlood in=\"SourceGraphic\" flood-opacity=\"1\" flood-color=\"rgb(255,255,255)\" result=\"flood1\" />\n"
           "<feColorMatrix in=\"%s\" values=\"1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 %s \" result=\"colormatrix1\" />\n"
           "<feColorMatrix in=\"blur1\" values=\"0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %s %s %s %s 0 \" result=\"colormatrix2\" />\n"
           "<feFlood stdDeviation=\"1\" flood-color=\"rgb(%s,%s,%s)\" flood-opacity=\"%s\" result=\"flood2\" />\n"
           "<feComposite in=\"flood2\" in2=\"colormatrix2\" stdDeviation=\"1\" operator=\"%s\" result=\"composite1\" />\n"
           "<feGaussianBlur in=\"composite1\" stdDeviation=\"%s\" result=\"blur2\" />\n"
-
           "<feSpecularLighting in=\"blur2\" lighting-color=\"rgb(%s,%s,%s)\" specularConstant=\"%s\" surfaceScale=\"%s\" specularExponent=\"%s\" result=\"specular\">\n"
             "<feDistantLight elevation=\"%s\" azimuth=\"%s\" />\n"
           "</feSpecularLighting>\n"
diff --git a/src/extension/internal/filter/color.h b/src/extension/internal/filter/color.h
index b34c2c61f..fb6ea0ab9 100644
--- a/src/extension/internal/filter/color.h
+++ b/src/extension/internal/filter/color.h
@@ -13,6 +13,7 @@
  *   Color shift
  *   Colorize
  *   Duochrome
+ *   Extract channel
  *   Greyscale
  *   Invert
  *   Lightness
@@ -517,6 +518,108 @@ Duochrome::get_filter_text (Inkscape::Extension::Extension * ext)
     return _filter;
 }; /* Duochrome filter */
 
+/**
+    \brief    Custom predefined Extract Channel filter.
+    
+    Extract color channel as a transparent image.
+
+    Filter's parameters:
+    * Channel (enum, all colors, default Red) -> colormatrix (values)
+    * Background blend (enum, all blend modes, default Multiply) -> blend (mode)
+    * Channel to alpha (boolean, default false) -> colormatrix (values)
+    * Invert (boolean, default false) -> colormatrix (values)
+
+*/
+class ExtractChannel : public Inkscape::Extension::Internal::Filter::Filter {
+protected:
+    virtual gchar const * get_filter_text (Inkscape::Extension::Extension * ext);
+
+public:
+    ExtractChannel ( ) : Filter() { };
+    virtual ~ExtractChannel ( ) { if (_filter != NULL) g_free((void *)_filter); return; }
+
+    static void init (void) {
+        Inkscape::Extension::build_from_mem(
+            "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+              "<name>" N_("Extract Channel") "</name>\n"
+              "<id>org.inkscape.effect.filter.ExtractChannel</id>\n"
+              "<param name=\"source\" gui-text=\"" N_("Channel:") "\" type=\"enum\">\n"
+                "<_item value=\"r\">" N_("Red") "</_item>\n"
+                "<_item value=\"g\">" N_("Green") "</_item>\n"
+                "<_item value=\"b\">" N_("Blue") "</_item>\n"
+              "</param>\n"
+              "<param name=\"blend\" gui-text=\"" N_("Background blend mode:") "\" type=\"enum\">\n"
+                "<_item value=\"multiply\">" N_("Multiply") "</_item>\n"
+                "<_item value=\"normal\">" N_("Normal") "</_item>\n"
+                "<_item value=\"screen\">" N_("Screen") "</_item>\n"
+                "<_item value=\"darken\">" N_("Darken") "</_item>\n"
+                "<_item value=\"lighten\">" N_("Lighten") "</_item>\n"
+              "</param>\n"
+              "<param name=\"alpha\" gui-text=\"" N_("Channel to alpha") "\" type=\"boolean\">false</param>\n"
+              "<param name=\"invert\" gui-text=\"" N_("Inverted") "\" type=\"boolean\">false</param>\n"
+              "<effect>\n"
+                "<object-type>all</object-type>\n"
+                "<effects-menu>\n"
+                  "<submenu name=\"" N_("Filters") "\">\n"
+                    "<submenu name=\"" N_("Color") "\"/>\n"
+                  "</submenu>\n"
+                "</effects-menu>\n"
+                "<menu-tip>" N_("Extract color channel as a transparent image") "</menu-tip>\n"
+              "</effect>\n"
+            "</inkscape-extension>\n", new ExtractChannel());
+    };
+};
+
+gchar const *
+ExtractChannel::get_filter_text (Inkscape::Extension::Extension * ext)
+{
+    if (_filter != NULL) g_free((void *)_filter);
+
+    std::ostringstream blend;
+    std::ostringstream colors;
+    std::ostringstream alpha;
+    std::ostringstream invert;
+
+    blend << ext->get_param_enum("blend");
+
+    const gchar *channel = ext->get_param_enum("source");
+    if (ext->get_param_bool("alpha")) {
+        colors << "0 0 0 0 0 0 0 0 0 0 0 0 0 0 0";
+    } else if ((g_ascii_strcasecmp("r", channel) == 0)) {
+        colors << "0 0 0 0 1 0 0 0 0 0 0 0 0 0 0";
+    } else if ((g_ascii_strcasecmp("g", channel) == 0)) {
+        colors << "0 0 0 0 0 0 0 0 0 1 0 0 0 0 0";
+    } else {
+        colors << "0 0 0 0 0 0 0 0 0 0 0 0 0 0 1";
+    }
+
+    if (ext->get_param_bool("invert")) {
+        if ((g_ascii_strcasecmp("r", channel) == 0)) {
+            alpha << "-1 0 0 1";
+        } else if ((g_ascii_strcasecmp("g", channel) == 0)) {
+            alpha << "0 -1 0 1";
+        } else {
+            alpha << "0 0 -1 1";
+        }
+    } else {
+        if ((g_ascii_strcasecmp("r", channel) == 0)) {
+            alpha << "1 0 0 0";
+        } else if ((g_ascii_strcasecmp("g", channel) == 0)) {
+            alpha << "0 1 0 0";
+        } else {
+            alpha << "0 0 1 0";
+        }
+    }
+
+    _filter = g_strdup_printf(
+        "<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" color-interpolation-filters=\"sRGB\" inkscape:label=\"Extract Channel\">\n"
+          "<feColorMatrix in=\"SourceGraphic\" values=\"%s %s %s 0 \" result=\"colormatrix\" />\n"
+          "<feBlend in2=\"BackgroundImage\" blend=\"normal\" mode=\"%s\" result=\"blend\" />\n"
+        "</filter>\n", colors.str().c_str(), alpha.str().c_str(), invert.str().c_str(), blend.str().c_str() );
+
+    return _filter;
+}; /* ExtractChannel filter */
+
 /**
     \brief    Custom predefined Greyscale filter.
     
diff --git a/src/extension/internal/filter/filter-all.cpp b/src/extension/internal/filter/filter-all.cpp
index dcd68b75a..30376d231 100755
--- a/src/extension/internal/filter/filter-all.cpp
+++ b/src/extension/internal/filter/filter-all.cpp
@@ -18,6 +18,7 @@
 #include "paint.h"
 #include "protrusions.h"
 #include "shadows.h"
+#include "textures.h"
 #include "transparency.h"
 
 namespace Inkscape {
@@ -53,6 +54,7 @@ Filter::filters_all (void )
     ColorShift::init();
     Colorize::init();
     Duochrome::init();
+    ExtractChannel::init();
     Greyscale::init();
     Invert::init();
     Lightness::init();
@@ -91,9 +93,10 @@ Filter::filters_all (void )
     ColorizableDropShadow::init();
 
     // Textures
-    // InkBlot::init();
+    InkBlot::init();
     
     // Fill and transparency
+    Blend::init();
     ChannelTransparency::init();
     Silhouette::init();
 
diff --git a/src/extension/internal/filter/transparency.h b/src/extension/internal/filter/transparency.h
index f8f02575b..9fd6cac22 100644
--- a/src/extension/internal/filter/transparency.h
+++ b/src/extension/internal/filter/transparency.h
@@ -8,6 +8,7 @@
  *   Nicolas Dufour (UI) <nicoduf@yahoo.fr>
  *
  * Fill and transparency filters
+ *   Blend
  *   Channel transparency
  *   Silhouette
  *
@@ -26,6 +27,73 @@ namespace Extension {
 namespace Internal {
 namespace Filter {
 
+/**
+    \brief    Custom predefined Blend filter.
+    
+    Blend objecs with background images or with themselves
+
+    Filter's parameters:
+    * Source (enum [SourceGraphic,BackgroundImage], default BackgroundImage) -> blend (in2)
+    * Mode (enum, all blend modes, default Multiply) -> blend (mode)
+*/
+
+class Blend : public Inkscape::Extension::Internal::Filter::Filter {
+protected:
+    virtual gchar const * get_filter_text (Inkscape::Extension::Extension * ext);
+
+public:
+    Blend ( ) : Filter() { };
+    virtual ~Blend ( ) { if (_filter != NULL) g_free((void *)_filter); return; }
+
+    static void init (void) {
+        Inkscape::Extension::build_from_mem(
+            "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+              "<name>" N_("Blend") "</name>\n"
+              "<id>org.inkscape.effect.filter.Blend</id>\n"
+              "<param name=\"source\" gui-text=\"" N_("Source:") "\" type=\"enum\">\n"
+                "<_item value=\"BackgroundImage\">" N_("Background") "</_item>\n"
+                "<_item value=\"SourceGraphic\">" N_("Image") "</_item>\n"
+              "</param>\n"
+              "<param name=\"mode\" gui-text=\"" N_("Mode:") "\" type=\"enum\">\n"
+                "<_item value=\"multiply\">" N_("Multiply") "</_item>\n"
+                "<_item value=\"normal\">" N_("Normal") "</_item>\n"
+                "<_item value=\"screen\">" N_("Screen") "</_item>\n"
+                "<_item value=\"darken\">" N_("Darken") "</_item>\n"
+                "<_item value=\"lighten\">" N_("Lighten") "</_item>\n"
+              "</param>\n"
+              "<effect>\n"
+                "<object-type>all</object-type>\n"
+                "<effects-menu>\n"
+                  "<submenu name=\"" N_("Filters") "\">\n"
+                    "<submenu name=\"" N_("Fill and Transparency") "\"/>\n"
+                  "</submenu>\n"
+                "</effects-menu>\n"
+                "<menu-tip>" N_("Blend objecs with background images or with themselves") "</menu-tip>\n"
+              "</effect>\n"
+            "</inkscape-extension>\n", new Blend());
+    };
+
+};
+
+gchar const *
+Blend::get_filter_text (Inkscape::Extension::Extension * ext)
+{
+    if (_filter != NULL) g_free((void *)_filter);
+
+    std::ostringstream source;
+    std::ostringstream mode;
+
+    source << ext->get_param_enum("source");
+    mode << ext->get_param_enum("mode");
+
+    _filter = g_strdup_printf(
+        "<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" color-interpolation-filters=\"sRGB\" inkscape:label=\"Blend\">\n"
+          "<feBlend blend=\"normal\" in2=\"%s\" mode=\"%s\" result=\"blend\" />\n"
+        "</filter>\n", source.str().c_str(), mode.str().c_str() );
+
+    return _filter;
+}; /* Blend filter */
+
 /**
     \brief    Custom predefined Channel transparency filter.
     
-- 
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