Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 145 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/cg/GradientCG.cpp b/Source/WebCore/platform/graphics/cg/GradientCG.cpp
new file mode 100644
index 0000000..974dd6b
--- /dev/null
+++ b/Source/WebCore/platform/graphics/cg/GradientCG.cpp
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2007 Alp Toker <alp@atoker.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "Gradient.h"
+
+#include "GraphicsContextCG.h"
+#include <ApplicationServices/ApplicationServices.h>
+#include <wtf/RetainPtr.h>
+
+namespace WebCore {
+
+void Gradient::platformDestroy()
+{
+#if USE_CG_SHADING
+    CGShadingRelease(m_gradient);
+#else
+    CGGradientRelease(m_gradient);
+#endif
+    m_gradient = 0;
+}
+
+#if USE_CG_SHADING
+static void gradientCallback(void* info, const CGFloat* in, CGFloat* out)
+{
+    float r, g, b, a;
+    static_cast<const Gradient*>(info)->getColor(*in, &r, &g, &b, &a);
+    out[0] = r;
+    out[1] = g;
+    out[2] = b;
+    out[3] = a;
+}
+
+CGShadingRef Gradient::platformGradient()
+{
+    if (m_gradient)
+        return m_gradient;
+
+    const CGFloat intervalRanges[2] = { 0, 1 };
+    const CGFloat colorComponentRanges[4 * 2] = { 0, 1, 0, 1, 0, 1, 0, 1 };
+    const CGFunctionCallbacks gradientCallbacks = { 0, gradientCallback, 0 };
+    RetainPtr<CGFunctionRef> colorFunction(AdoptCF, CGFunctionCreate(this, 1, intervalRanges, 4, colorComponentRanges, &gradientCallbacks));
+
+    CGColorSpaceRef colorSpace = deviceRGBColorSpaceRef();
+
+    if (m_radial)
+        m_gradient = CGShadingCreateRadial(colorSpace, m_p0, m_r0, m_p1, m_r1, colorFunction.get(), true, true);
+    else
+        m_gradient = CGShadingCreateAxial(colorSpace, m_p0, m_p1, colorFunction.get(), true, true);
+
+    return m_gradient;
+}
+#else
+CGGradientRef Gradient::platformGradient()
+{
+    if (m_gradient)
+        return m_gradient;
+
+    sortStopsIfNecessary();
+    
+    const int cReservedStops = 3;
+    Vector<CGFloat, 4 * cReservedStops> colorComponents;
+    colorComponents.reserveCapacity(m_stops.size() * 4); // RGBA components per stop
+
+    Vector<CGFloat, cReservedStops> locations;
+    locations.reserveCapacity(m_stops.size());
+
+    for (size_t i = 0; i < m_stops.size(); ++i) {
+        colorComponents.uncheckedAppend(m_stops[i].red);
+        colorComponents.uncheckedAppend(m_stops[i].green);
+        colorComponents.uncheckedAppend(m_stops[i].blue);
+        colorComponents.uncheckedAppend(m_stops[i].alpha);
+
+        locations.uncheckedAppend(m_stops[i].stop);
+    }
+    
+    m_gradient = CGGradientCreateWithColorComponents(deviceRGBColorSpaceRef(), colorComponents.data(), locations.data(), m_stops.size());
+
+    return m_gradient;
+}
+#endif
+
+void Gradient::fill(GraphicsContext* context, const FloatRect& rect)
+{
+    context->clip(rect);
+    paint(context);
+}
+
+void Gradient::paint(GraphicsContext* context)
+{
+    CGContextRef ctx = context->platformContext();
+    paint(ctx);
+}
+
+void Gradient::paint(CGContextRef context)
+{
+#if USE_CG_SHADING
+    CGContextDrawShading(context, platformGradient());
+#else
+    CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
+    if (m_radial) {
+        bool needScaling = aspectRatio() != 1;
+        if (needScaling) {
+            CGContextSaveGState(context);
+            // Scale from the center of the gradient. We only ever scale non-deprecated gradients,
+            // for which m_p0 == m_p1.
+            ASSERT(m_p0 == m_p1);
+            CGContextTranslateCTM(context, m_p0.x(), m_p0.y());
+            CGContextScaleCTM(context, 1, 1 / aspectRatio());
+            CGContextTranslateCTM(context, -m_p0.x(), -m_p0.y());
+        }
+
+        CGContextDrawRadialGradient(context, platformGradient(), m_p0, m_r0, m_p1, m_r1, extendOptions);
+
+        if (needScaling)
+            CGContextRestoreGState(context);
+    } else
+        CGContextDrawLinearGradient(context, platformGradient(), m_p0, m_p1, extendOptions);
+#endif
+}
+
+} //namespace