Attachment 10910 Details for Bug 7856 – initial implementation of transparency groups

[patch] initial implementation of transparency groups

trans-group.patch (text/plain), 3.40 KB, created by Jeff Muizelaar on 2007-07-28 09:15:54 UTC

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Creator: Jeff Muizelaar

Created: 2007-07-28 09:15:54 UTC

Size: 3.40 KB

patch

obsolete

>? mkinstalldirs
>Index: poppler/CairoOutputDev.cc
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/CairoOutputDev.cc,v
>retrieving revision 1.48
>diff -u -r1.48 CairoOutputDev.cc
>--- poppler/CairoOutputDev.cc	21 Dec 2006 01:01:30 -0000	1.48
>+++ poppler/CairoOutputDev.cc	28 Jul 2007 16:10:34 -0000
>@@ -491,6 +491,51 @@
> 
> }
> 
>+cairo_pattern_t *group;
>+cairo_pattern_t *mask;
>+void CairoOutputDev::beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
>+                                      GfxColorSpace * /*blendingColorSpace*/,
>+                                      GBool /*isolated*/, GBool /*knockout*/,
>+				      GBool forSoftMask) {
>+  printf("push group\n");
>+  if (0 && forSoftMask)
>+    cairo_push_group_with_content (cairo, CAIRO_CONTENT_ALPHA);
>+  else
>+    cairo_push_group (cairo);
>+}
>+void CairoOutputDev::endTransparencyGroup(GfxState * /*state*/) {
>+  printf("pop group\n");
>+  group = cairo_pop_group (cairo);
>+}
>+void CairoOutputDev::paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {
>+  cairo_set_source (cairo, group);
>+  if (!mask) {
>+    printf("paint group: %g\n", fill_opacity);
>+    static int count;
>+    //if (count++)
>+      cairo_paint_with_alpha (cairo, fill_opacity);
>+  } else {
>+    printf("paint group w/ mask\n");
>+    //cairo_set_source_rgb(cairo, 1.0, 0, 0);
>+    cairo_set_source (cairo, mask);
>+    cairo_paint(cairo);
>+    mask = NULL;
>+  }
>+}
>+
>+void CairoOutputDev::setSoftMask(GfxState * /*state*/, double * /*bbox*/, GBool alpha,
>+                                 Function * /*transferFunc*/, GfxColor * /*backdropColor*/) {
>+  printf("set soft mask\n");
>+  //XXX we don't proplery deal with luminocity (e.g. alpha = false) masks
>+  cairo_set_source (cairo, group);
>+  mask = group;
>+  //cairo_paint (cairo);
>+}
>+
>+void CairoOutputDev::clearSoftMask(GfxState * /*state*/) {
>+  printf("clear soft mask\n");
>+  //mask = NULL;
>+}
> 
> void CairoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
> 				    int width, int height, GBool invert,
>Index: poppler/CairoOutputDev.h
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/CairoOutputDev.h,v
>retrieving revision 1.17
>diff -u -r1.17 CairoOutputDev.h
>--- poppler/CairoOutputDev.h	31 May 2006 17:31:49 -0000	1.17
>+++ poppler/CairoOutputDev.h	28 Jul 2007 16:10:34 -0000
>@@ -133,10 +133,21 @@
> 				GBool maskInvert);
> 
> 
>+  //----- transparency groups and soft masks
>+  virtual void beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
>+                                      GfxColorSpace * /*blendingColorSpace*/,
>+                                      GBool /*isolated*/, GBool /*knockout*/,
>+                                      GBool /*forSoftMask*/);
>+  virtual void endTransparencyGroup(GfxState * /*state*/);
>+  virtual void paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/);
>+  virtual void setSoftMask(GfxState * /*state*/, double * /*bbox*/, GBool /*alpha*/,
>+                           Function * /*transferFunc*/, GfxColor * /*backdropColor*/);
>+  virtual void clearSoftMask(GfxState * /*state*/);
>+
>   //----- Type 3 font operators
>   virtual void type3D0(GfxState *state, double wx, double wy);
>   virtual void type3D1(GfxState *state, double wx, double wy,
>-		       double llx, double lly, double urx, double ury);
>+      double llx, double lly, double urx, double ury);
> 
>   //----- special access
>

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