Added initial transparency group and softmask support

[inkscape.git] / src / extension / internal / pdfinput / svg-builder.h

diff --git a/src/extension/internal/pdfinput/svg-builder.h b/src/extension/internal/pdfinput/svg-builder.h
index a329e3020111d67f42ba6f92419aea3ef0b17736..9298884a1898fddfddfb91d317be1269f345dabe 100644 (file)
--- a/src/extension/internal/pdfinput/svg-builder.h
+++ b/src/extension/internal/pdfinput/svg-builder.h
@@ -32,11 +32,14 @@ namespace Inkscape {
 #include "CharTypes.h"
 class GooString;
 class Function;
-class SampledFunction;
 struct GfxState;
+class GfxColor;
+class GfxColorSpace;
+class GfxRGB;
+class GfxPath;
 class GfxPattern;
-class GfxShadingPattern;
 class GfxTilingPattern;
+class GfxShading;
 class GfxFont;
 class GfxImageColorMap;
 class Stream;
@@ -51,6 +54,19 @@ namespace Inkscape {
 namespace Extension {
 namespace Internal {
 
+struct SvgTransparencyGroup;
+
+/**
+ * \struct SvgGraphicsState
+ * Holds information about the current softmask and group depth.
+ * Could be later used to store other graphics state parameters so that we could
+ * emit only the differences in style settings from the parent state.
+ */
+struct SvgGraphicsState {
+    Inkscape::XML::Node *softmask; // Points to current softmask node
+    int group_depth;    // Depth of nesting groups at this level
+};
+
 /**
  * \struct SvgGlyph
  * Holds information about glyphs added by PdfParser which haven't been added
@@ -86,6 +102,7 @@ public:
     // Property setting
     void setDocumentSize(double width, double height);  // Document size in px
     void setAsLayer(char *layer_name=NULL);
+    void setGroupOpacity(double opacity);
 
     // Handling the node stack
     Inkscape::XML::Node *pushGroup();
@@ -94,10 +111,32 @@ public:
 
     // Path adding
     void addPath(GfxState *state, bool fill, bool stroke, bool even_odd=false);
+    void addShadedFill(GfxShading *shading, double *matrix, GfxPath *path, bool even_odd=false);
 
     // Image handling
     void addImage(GfxState *state, Stream *str, int width, int height,
                   GfxImageColorMap *color_map, int *mask_colors);
+    void addImageMask(GfxState *state, Stream *str, int width, int height,
+                      bool invert);
+    void addMaskedImage(GfxState *state, Stream *str, int width, int height,
+                        GfxImageColorMap *color_map,
+                        Stream *mask_str, int mask_width, int mask_height,
+                        bool invert_mask);
+    void addSoftMaskedImage(GfxState *state, Stream *str, int width, int height,
+                            GfxImageColorMap *color_map,
+                            Stream *mask_str, int mask_width, int mask_height,
+                            GfxImageColorMap *mask_color_map);
+
+    // Transparency group and soft mask handling
+    void pushTransparencyGroup(GfxState *state, double *bbox,
+                               GfxColorSpace *blending_color_space,
+                               bool isolated, bool knockout,
+                               bool for_softmask);
+    void popTransparencyGroup(GfxState *state);
+    void paintTransparencyGroup(GfxState *state, double *bbox);
+    void setSoftMask(GfxState *state, double *bbox, bool alpha,
+                     Function *transfer_func, GfxColor *backdrop_color);
+    void clearSoftMask(GfxState *state);
 
     // Text handling
     void beginString(GfxState *state, GooString *s);
@@ -131,20 +170,22 @@ public:
     bool getTransform(double *transform);
 
 private:
-    SvgBuilder();
+    void _init();
 
     // Pattern creation
     gchar *_createPattern(GfxPattern *pattern, GfxState *state, bool is_stroke=false);
-    gchar *_createGradient(GfxShadingPattern *shading_pattern);
-    bool _addStopsToGradient(Inkscape::XML::Node *gradient, Function *func, double opacity);
-    bool _addSamplesToGradient(Inkscape::XML::Node *gradient, SampledFunction *func,
-                              double offset0, double offset1, double opacity);
+    gchar *_createGradient(GfxShading *shading, double *matrix, bool for_shading=false);
+    void _addStopToGradient(Inkscape::XML::Node *gradient, double offset,
+                            GfxRGB *color, double opacity);
+    bool _addGradientStops(Inkscape::XML::Node *gradient, GfxShading *shading,
+                           Function *func);
     gchar *_createTilingPattern(GfxTilingPattern *tiling_pattern, GfxState *state,
                                 bool is_stroke=false);
     // Image/mask creation
     Inkscape::XML::Node *_createImage(Stream *str, int width, int height,
                                       GfxImageColorMap *color_map, int *mask_colors,
                                       bool alpha_only=false, bool invert_alpha=false);
+    Inkscape::XML::Node *_createMask(double width, double height);
     // Style setting
     SPCSSAttr *_setStyle(GfxState *state, bool fill, bool stroke, bool even_odd=false);
     void _setStrokeStyle(SPCSSAttr *css, GfxState *state);
@@ -152,7 +193,13 @@ private:
 
     void _flushText();    // Write buffered text into doc
 
+    // Handling of node stack
+    Inkscape::XML::Node *pushNode(const char* name);
+    Inkscape::XML::Node *popNode();
+    std::vector<Inkscape::XML::Node *> _node_stack;
     std::vector<int> _group_depth;    // Depth of nesting groups
+    SvgTransparencyGroup *_transp_group_stack;  // Transparency group stack
+    std::vector<SvgGraphicsState> _state_stack;
 
     SPCSSAttr *_font_style;          // Current font style
     GfxFont *_current_font;
@@ -166,6 +213,7 @@ private:
     bool _invalidated_style;
     GfxState *_current_state;
 
+    bool _is_top_level;  // Whether this SvgBuilder is the top-level one
     SPDocument *_doc;
     gchar *_docname;    // Basename of the URI from which this document is created
     XRef *_xref;    // Cross-reference table from the PDF doc we're converting from