Bug 1208365 (part 3) - Change gfxPattern::mExtend from a GraphicsExtend to a gfx::ExtendMode. r=bas.

At this point, the relationship between GraphicsExtend and gfx::ExtendMode is
as follows.

- EXTEND_REPEAT matches up with REPEAT.
- EXTEND_REFLECT matches up with REFLECT.
- EXTEND_PAD matches up with CLAMP.
- EXTEND_NONE has no matching value in gfx::ExtendMode.

The only use of EXTEND_NONE is with nsSVGGradientFrame::mExtend. That field
gets assigned EXTEND_NONE in the various constructors, and other values via
SetExtend(). And all uses of that field go immediately into ToExtend() calls,
which convert EXTEND_NONE to CLAMP. So it's safe to change this field to
gfx::ExtendMode and initialize it to CLAMP.

gfx/thebes/gfxPattern.cpp

@@ -20,14 +20,14 @@
 using namespace mozilla::gfx;
 
 gfxPattern::gfxPattern(const Color& aColor)
-  : mExtend(EXTEND_NONE)
+  : mExtend(ExtendMode::CLAMP)
 {
   mGfxPattern.InitColorPattern(ToDeviceColor(aColor));
 }
 
 // linear
 gfxPattern::gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1)
-  : mExtend(EXTEND_NONE)
+  : mExtend(ExtendMode::CLAMP)
 {
   mGfxPattern.InitLinearGradientPattern(Point(x0, y0), Point(x1, y1), nullptr);
 }
@@ -35,7 +35,7 @@ gfxPattern::gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1)
 // radial
 gfxPattern::gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
                        gfxFloat cx1, gfxFloat cy1, gfxFloat radius1)
-  : mExtend(EXTEND_NONE)
+  : mExtend(ExtendMode::CLAMP)
 {
   mGfxPattern.InitRadialGradientPattern(Point(cx0, cy0), Point(cx1, cy1),
                                         radius0, radius1, nullptr);
@@ -44,9 +44,9 @@ gfxPattern::gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
 // Azure
 gfxPattern::gfxPattern(SourceSurface *aSurface, const Matrix &aPatternToUserSpace)
   : mPatternToUserSpace(aPatternToUserSpace)
-  , mExtend(EXTEND_NONE)
+  , mExtend(ExtendMode::CLAMP)
 {
-  mGfxPattern.InitSurfacePattern(aSurface, ToExtendMode(mExtend), Matrix(), // matrix is overridden in GetPattern()
+  mGfxPattern.InitSurfacePattern(aSurface, mExtend, Matrix(), // matrix is overridden in GetPattern()
                                  mozilla::gfx::Filter::GOOD);
 }
 
@@ -75,8 +75,7 @@ gfxPattern::SetColorStops(GradientStops* aStops)
 void
 gfxPattern::CacheColorStops(const DrawTarget *aDT)
 {
-  mStops = gfxGradientCache::GetOrCreateGradientStops(aDT, mStopsList,
-                                                      ToExtendMode(mExtend));
+  mStops = gfxGradientCache::GetOrCreateGradientStops(aDT, mStopsList, mExtend);
 }
 
 void
@@ -132,15 +131,14 @@ gfxPattern::GetPattern(const DrawTarget *aTarget,
   if (!mStops &&
       !mStopsList.IsEmpty()) {
     mStops = aTarget->CreateGradientStops(mStopsList.Elements(),
-                                          mStopsList.Length(),
-                                          ToExtendMode(mExtend));
+                                          mStopsList.Length(), mExtend);
   }
 
   switch (mGfxPattern.GetPattern()->GetType()) {
   case PatternType::SURFACE: {
     SurfacePattern* surfacePattern = static_cast<SurfacePattern*>(mGfxPattern.GetPattern());
     surfacePattern->mMatrix = patternToUser;
-    surfacePattern->mExtendMode = ToExtendMode(mExtend);
+    surfacePattern->mExtendMode = mExtend;
     break;
   }
   case PatternType::LINEAR_GRADIENT: {
@@ -164,9 +162,9 @@ gfxPattern::GetPattern(const DrawTarget *aTarget,
 }
 
 void
-gfxPattern::SetExtend(GraphicsExtend extend)
+gfxPattern::SetExtend(ExtendMode aExtend)
 {
-  mExtend = extend;
+  mExtend = aExtend;
   mStops = nullptr;
 }
 

gfx/thebes/gfxPattern.h

@@ -60,8 +60,8 @@ public:
         EXTEND_PAD
     };
 
-    // none, repeat, reflect
-    void SetExtend(GraphicsExtend extend);
+    // clamp, repeat, reflect
+    void SetExtend(mozilla::gfx::ExtendMode aExtend);
 
     int CairoStatus();
 
@@ -80,7 +80,7 @@ private:
     mozilla::gfx::Matrix mPatternToUserSpace;
     mozilla::RefPtr<mozilla::gfx::GradientStops> mStops;
     nsTArray<mozilla::gfx::GradientStop> mStopsList;
-    GraphicsExtend mExtend;
+    mozilla::gfx::ExtendMode mExtend;
 };
 
 #endif /* GFX_PATTERN_H */

gfx/thebes/gfxWindowsNativeDrawing.cpp

@@ -290,7 +290,7 @@ gfxWindowsNativeDrawing::PaintToContext()
         if (mNativeDrawFlags & DO_NEAREST_NEIGHBOR_FILTERING)
             pat->SetFilter(GraphicsFilter::FILTER_FAST);
 
-        pat->SetExtend(gfxPattern::EXTEND_PAD);
+        pat->SetExtend(ExtendMode::CLAMP);
         mContext->SetPattern(pat);
         mContext->Fill();
         mContext->Restore();

layout/svg/nsSVGGradientFrame.cpp

@@ -278,11 +278,11 @@ nsSVGGradientFrame::GetPaintServerPattern(nsIFrame* aSource,
 
   uint16_t aSpread = GetSpreadMethod();
   if (aSpread == SVG_SPREADMETHOD_PAD)
-    gradient->SetExtend(gfxPattern::EXTEND_PAD);
+    gradient->SetExtend(ExtendMode::CLAMP);
   else if (aSpread == SVG_SPREADMETHOD_REFLECT)
-    gradient->SetExtend(gfxPattern::EXTEND_REFLECT);
+    gradient->SetExtend(ExtendMode::REFLECT);
   else if (aSpread == SVG_SPREADMETHOD_REPEAT)
-    gradient->SetExtend(gfxPattern::EXTEND_REPEAT);
+    gradient->SetExtend(ExtendMode::REPEAT);
 
   gradient->SetMatrix(patternMatrix);
 

layout/svg/nsSVGGradientFrame.h

@@ -39,6 +39,8 @@ typedef nsSVGPaintServerFrame nsSVGGradientFrameBase;
  */
 class nsSVGGradientFrame : public nsSVGGradientFrameBase
 {
+  typedef mozilla::gfx::ExtendMode ExtendMode;
+
 protected:
   explicit nsSVGGradientFrame(nsStyleContext* aContext);
 

layout/svg/nsSVGPatternFrame.cpp

@@ -723,7 +723,7 @@ nsSVGPatternFrame::GetPaintServerPattern(nsIFrame *aSource,
   if (!pattern || pattern->CairoStatus())
     return nullptr;
 
-  pattern->SetExtend(gfxPattern::EXTEND_REPEAT);
+  pattern->SetExtend(ExtendMode::REPEAT);
   return pattern.forget();
 }