From 65f03d4f644ce73618e5f4f50dd694b26f55ae12 Mon Sep 17 00:00:00 2001
From: Ben Murdoch <benm@google.com>
Date: Fri, 13 May 2011 16:23:25 +0100
Subject: Merge WebKit at r75993: Initial merge by git.

Change-Id: I602bbdc3974787a3b0450456a30a7868286921c3
---
 .../platform/graphics/cg/GraphicsContextCG.cpp     | 47 +++++++++++++++++-----
 .../graphics/cg/GraphicsContextPlatformPrivateCG.h |  5 +++
 .../WebCore/platform/graphics/cg/ImageBufferCG.cpp | 11 +++--
 .../platform/graphics/cg/PDFDocumentImage.h        |  5 +++
 4 files changed, 54 insertions(+), 14 deletions(-)

(limited to 'Source/WebCore/platform/graphics/cg')

diff --git a/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp b/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
index acd912f..eddf735 100644
--- a/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
+++ b/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
@@ -546,21 +546,46 @@ void GraphicsContext::fillPath(const Path& path)
 
     CGContextRef context = platformContext();
 
-    CGContextBeginPath(context);
-    CGContextAddPath(context, path.platformPath());
-
     if (m_state.fillGradient) {
-        CGContextSaveGState(context);
-        if (fillRule() == RULE_EVENODD)
-            CGContextEOClip(context);
-        else
-            CGContextClip(context);
-        CGContextConcatCTM(context, m_state.fillGradient->gradientSpaceTransform());
-        m_state.fillGradient->paint(this);
-        CGContextRestoreGState(context);
+        if (hasShadow()) {
+            FloatRect rect = path.boundingRect();
+            CGLayerRef layer = CGLayerCreateWithContext(context, CGSizeMake(rect.width(), rect.height()), 0);
+            CGContextRef layerContext = CGLayerGetContext(layer);
+
+            CGContextTranslateCTM(layerContext, -rect.x(), -rect.y());
+            CGContextBeginPath(layerContext);
+            CGContextAddPath(layerContext, path.platformPath());
+            CGContextConcatCTM(layerContext, m_state.fillGradient->gradientSpaceTransform());
+
+            if (fillRule() == RULE_EVENODD)
+                CGContextEOClip(layerContext);
+            else
+                CGContextClip(layerContext);
+
+            m_state.fillGradient->paint(layerContext);
+            CGContextDrawLayerAtPoint(context, CGPointMake(rect.left(), rect.top()), layer);
+            CGLayerRelease(layer);
+        } else {
+            CGContextBeginPath(context);
+            CGContextAddPath(context, path.platformPath());
+            CGContextSaveGState(context);
+            CGContextConcatCTM(context, m_state.fillGradient->gradientSpaceTransform());
+
+            if (fillRule() == RULE_EVENODD)
+                CGContextEOClip(context);
+            else
+                CGContextClip(context);
+
+            m_state.fillGradient->paint(this);
+            CGContextRestoreGState(context);
+        }
+
         return;
     }
 
+    CGContextBeginPath(context);
+    CGContextAddPath(context, path.platformPath());
+
     if (m_state.fillPattern)
         applyFillPattern();
     fillPathWithFillRule(context, fillRule());
diff --git a/Source/WebCore/platform/graphics/cg/GraphicsContextPlatformPrivateCG.h b/Source/WebCore/platform/graphics/cg/GraphicsContextPlatformPrivateCG.h
index 1d0a99f..d4fa32e 100644
--- a/Source/WebCore/platform/graphics/cg/GraphicsContextPlatformPrivateCG.h
+++ b/Source/WebCore/platform/graphics/cg/GraphicsContextPlatformPrivateCG.h
@@ -23,6 +23,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
+#ifndef GraphicsContextPlatformPrivateCG_h
+#define GraphicsContextPlatformPrivateCG_h
+
 #include <wtf/RetainPtr.h>
 #include <CoreGraphics/CGContext.h>
 
@@ -84,3 +87,5 @@ public:
 };
 
 }
+
+#endif // GraphicsContextPlatformPrivateCG_h
diff --git a/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp b/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp
index 75a36e5..023d098 100644
--- a/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp
+++ b/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp
@@ -54,6 +54,8 @@ using namespace std;
 namespace WebCore {
 
 #if USE(IOSURFACE_CANVAS_BACKING_STORE)
+static const int maxIOSurfaceDimension = 4096;
+
 static RetainPtr<IOSurfaceRef> createIOSurface(const IntSize& size)
 {
     unsigned pixelFormat = 'BGRA';
@@ -110,12 +112,15 @@ ImageBuffer::ImageBuffer(const IntSize& size, ColorSpace imageColorSpace, Render
     , m_size(size)
     , m_accelerateRendering(renderingMode == Accelerated)
 {
-#if !USE(IOSURFACE_CANVAS_BACKING_STORE)
-    ASSERT(renderingMode == Unaccelerated);
-#endif
     success = false;  // Make early return mean failure.
     if (size.width() < 0 || size.height() < 0)
         return;
+#if USE(IOSURFACE_CANVAS_BACKING_STORE)
+    if (size.width() >= maxIOSurfaceDimension || size.height() >= maxIOSurfaceDimension)
+        m_accelerateRendering = false;
+#else
+    ASSERT(renderingMode == Unaccelerated);
+#endif
 
     unsigned bytesPerRow = size.width();
     if (bytesPerRow > 0x3FFFFFFF) // Protect against overflow
diff --git a/Source/WebCore/platform/graphics/cg/PDFDocumentImage.h b/Source/WebCore/platform/graphics/cg/PDFDocumentImage.h
index 790d620..ecd57be 100644
--- a/Source/WebCore/platform/graphics/cg/PDFDocumentImage.h
+++ b/Source/WebCore/platform/graphics/cg/PDFDocumentImage.h
@@ -23,6 +23,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
+#ifndef PDFDocumentImage_h
+#define PDFDocumentImage_h
+
 #include "Image.h"
 
 #include "FloatRect.h"
@@ -76,3 +79,5 @@ namespace WebCore {
 }
 
 #endif // PLATFORM(CG)
+
+#endif // PDFDocumentImage_h
-- 
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