Attachment 14507 Details for Bug 14408 – Begin adding support for using cairo gradients to paint gradients.

[patch] Begin adding support for using cairo gradients to paint gradients.

patch (text/plain), 4.13 KB, created by Jeff Muizelaar on 2008-02-22 12:15:29 UTC

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Creator: Jeff Muizelaar

Created: 2008-02-22 12:15:29 UTC

Size: 4.13 KB

patch

obsolete

>diff --git a/poppler/CairoOutputDev.cc b/poppler/CairoOutputDev.cc
>index 0bc0ab4..a213613 100644
>--- a/poppler/CairoOutputDev.cc
>+++ b/poppler/CairoOutputDev.cc
>@@ -328,6 +328,102 @@ void CairoOutputDev::updateFillOpacity(GfxState *state) {
>   LOG(printf ("fill opacity: %f\n", fill_opacity));
> }
> 
>+GBool CairoOutputDev::axialShadedFill(GfxState *state, GfxAxialShading *shading) {
>+  double x0, y0, x1, y1;
>+  cairo_extend_t extend;
>+  printf("axialShaded\n");
>+
>+  if (shading->getExtend0() != shading->getExtend1()) {
>+    printf("non matching extents\n");
>+    return gFalse;
>+  } else {
>+    extend = shading->getExtend0() ? CAIRO_EXTEND_PAD : CAIRO_EXTEND_NONE;
>+  }
>+
>+  if (shading->getDomain0() != 0 || shading->getDomain1() != 1)
>+    return gFalse;
>+
>+  if (shading->getNFuncs() == 1) {
>+    Function *func = shading->getFunc(0);
>+
>+    if (func->getType() != 2) {
>+      printf("wrong function type\n");
>+      return gFalse;
>+    }
>+
>+    ExponentialFunction *func2 = (ExponentialFunction *)func;
>+
>+    if (func2->getE() != 1)
>+      return gFalse;
>+
>+    if (func2->getDomainMin(0) != 0 || func2->getDomainMax(0) != 1)
>+      return gFalse;
>+
>+    if (func2->getHasRange())
>+      return gFalse;
>+
>+    shading->getCoords(&x0, &y0, &x1, &y1);
>+    cairo_pattern_t *linear_pattern = cairo_pattern_create_linear(x0, y0, x1, y1);
>+    if (func2->getOutputSize() == 3 &&
>+	shading->getColorSpace()->getMode() == csDeviceRGB) {
>+      //XXX: are the offsets correct?
>+      cairo_pattern_add_color_stop_rgb(linear_pattern,
>+	  0.0,
>+	  func2->getC0()[0],
>+	  func2->getC0()[1],
>+	  func2->getC0()[2]);
>+
>+      cairo_pattern_add_color_stop_rgb(linear_pattern,
>+	  1.1,
>+	  func2->getC1()[0],
>+	  func2->getC1()[1],
>+	  func2->getC1()[2]);
>+    } else if (func2->getOutputSize() == 1 &&
>+	shading->getColorSpace()->getMode() == csDeviceGray) {
>+      //XXX: are the offsets correct?
>+      cairo_pattern_add_color_stop_rgb(linear_pattern,
>+	  0.0,
>+	  func2->getC0()[0],
>+	  func2->getC0()[0],
>+	  func2->getC0()[0]);
>+
>+      cairo_pattern_add_color_stop_rgb(linear_pattern,
>+	  1.1,
>+	  func2->getC1()[0],
>+	  func2->getC1()[0],
>+	  func2->getC1()[0]);
>+    } else {
>+      printf("bad color space %d %d\n", shading->getColorSpace()->getMode(),
>+	  func2->getOutputSize());
>+      cairo_pattern_destroy(linear_pattern);
>+      return gFalse;
>+    }
>+
>+    cairo_pattern_set_extend(linear_pattern, extend);
>+    cairo_pattern_destroy(fill_pattern);
>+    fill_pattern = linear_pattern;
>+
>+    double xMin, yMin, xMax, yMax;
>+    // get the clip region bbox
>+    state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
>+    cairo_save (cairo);
>+    cairo_rectangle (cairo, xMin, yMin, xMax - xMin, yMax - yMin);
>+    cairo_set_source (cairo, fill_pattern);
>+    cairo_fill (cairo);
>+    cairo_restore (cairo);
>+    if (cairo_shape) {
>+      cairo_save (cairo_shape);
>+      cairo_rectangle (cairo_shape, xMin, yMin, xMax - xMin, yMax - yMin);
>+      cairo_fill (cairo_shape);
>+      cairo_restore (cairo_shape);
>+    }
>+  } else {
>+    return gFalse;
>+  }
>+  printf("linear output\n");
>+  return gTrue;
>+}
>+
> void CairoOutputDev::updateStrokeOpacity(GfxState *state) {
>   stroke_opacity = state->getStrokeOpacity();
> 
>diff --git a/poppler/CairoOutputDev.h b/poppler/CairoOutputDev.h
>index 5d2b658..d5e1b1f 100644
>--- a/poppler/CairoOutputDev.h
>+++ b/poppler/CairoOutputDev.h
>@@ -82,6 +82,8 @@ public:
>   // text in Type 3 fonts will be drawn with drawChar/drawString.
>   virtual GBool interpretType3Chars() { return gTrue; }
> 
>+  virtual GBool useShadedFills() { return gTrue; }
>+
>   //----- initialization and control
> 
>   // Start a page.
>@@ -185,6 +187,8 @@ public:
>   virtual void type3D1(GfxState *state, double wx, double wy,
>       double llx, double lly, double urx, double ury);
> 
>+
>+  virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading);
>   //----- special access
> 
>   // Called to indicate that a new PDF document has been loaded.
>@@ -262,6 +266,8 @@ public:
>   // Does this device need non-text content?
>   virtual GBool needNonText() { return gTrue; }
> 
>+  virtual GBool useShadedFills() { return gTrue; }
>+
>     //----- link borders
>   virtual void drawLink(Link *link, Catalog *catalog) { }
>

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Attachments on bug 14408: 14183 | 14184 | 14185 | 14186 | 14507

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