1 files changed, 126 insertions, 0 deletions
diff --git a/WebCore/svg/graphics/cg/SVGPaintServerPatternCg.cpp b/WebCore/svg/graphics/cg/SVGPaintServerPatternCg.cpp
new file mode 100644
index 0000000..e12ff77
--- /dev/null
+++ b/WebCore/svg/graphics/cg/SVGPaintServerPatternCg.cpp
@@ -0,0 +1,126 @@
+/*
+    Copyright (C) 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
+
+    This file is part of the KDE project
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    aint with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+
+#if ENABLE(SVG)
+#include "SVGPaintServerPattern.h"
+
+#include "CgSupport.h"
+#include "GraphicsContext.h"
+#include "ImageBuffer.h"
+#include "RenderObject.h"
+#include "SVGPatternElement.h"
+
+namespace WebCore {
+
+static void patternCallback(void* info, CGContextRef context)
+{
+    ImageBuffer* patternImage = reinterpret_cast<ImageBuffer*>(info);
+    CGContextDrawImage(context, CGRect(FloatRect(FloatPoint(), patternImage->size())), patternImage->cgImage());
+}
+
+bool SVGPaintServerPattern::setup(GraphicsContext*& context, const RenderObject* object, SVGPaintTargetType type, bool isPaintingText) const
+{
+    CGContextRef contextRef = context->platformContext();
+
+    // Build pattern tile, passing destination object bounding box
+    FloatRect targetRect;
+    if (isPaintingText) {
+        IntRect textBoundary = const_cast<RenderObject*>(object)->absoluteBoundingBoxRect();
+        targetRect = object->absoluteTransform().inverse().mapRect(textBoundary);
+    } else
+        targetRect = object->relativeBBox(false);
+
+    m_ownerElement->buildPattern(targetRect);
+
+    if (!tile())
+        return false;
+
+    context->save();
+
+    // Respect local pattern transformation
+    context->concatCTM(patternTransform());
+
+    // Apply pattern space transformation
+    context->translate(patternBoundaries().x(), patternBoundaries().y());
+
+    // Crude hack to support overflow="visible".
+    // When the patternBoundaries() size is smaller than the actual tile() size, we run into a problem:
+    // Our tile contains content which is larger than the pattern cell size. We just draw the pattern
+    // "out of" cell boundaries, to draw the overflown content, instead of clipping it away. The uppermost
+    // cell doesn't include the overflown content of the cell right above it though -> that's why we're moving
+    // down the phase by a very small amount, so we're sure the "cell right above"'s overflown content gets drawn.
+    CGContextSetPatternPhase(contextRef, CGSizeMake(0.0f, -0.01f));
+
+    RenderStyle* style = object->style();
+    CGContextSetAlpha(contextRef, style->opacity());
+
+    CGPatternCallbacks callbacks = {0, patternCallback, 0};
+
+    ASSERT(!m_pattern);
+    m_pattern = CGPatternCreate(tile(),
+                                CGRect(FloatRect(FloatPoint(), tile()->size())),
+                                CGContextGetCTM(contextRef),
+                                patternBoundaries().width(),
+                                patternBoundaries().height(),
+                                kCGPatternTilingConstantSpacing,
+                                true, // has color
+                                &callbacks);
+
+    if (!m_patternSpace)
+        m_patternSpace = CGColorSpaceCreatePattern(0);
+
+    if ((type & ApplyToFillTargetType) && style->svgStyle()->hasFill()) {
+        CGFloat alpha = style->svgStyle()->fillOpacity();
+        CGContextSetFillColorSpace(contextRef, m_patternSpace);
+        CGContextSetFillPattern(contextRef, m_pattern, &alpha);
+ 
+        if (isPaintingText) 
+            context->setTextDrawingMode(cTextFill);
+    }
+
+    if ((type & ApplyToStrokeTargetType) && style->svgStyle()->hasStroke()) {
+        CGFloat alpha = style->svgStyle()->strokeOpacity();
+        CGContextSetStrokeColorSpace(contextRef, m_patternSpace);
+        CGContextSetStrokePattern(contextRef, m_pattern, &alpha);
+        applyStrokeStyleToContext(context, style, object);
+
+        if (isPaintingText) 
+            context->setTextDrawingMode(cTextStroke);
+    }
+
+    return true;
+}
+
+void SVGPaintServerPattern::teardown(GraphicsContext*& context, const RenderObject*, SVGPaintTargetType, bool) const
+{
+    CGPatternRelease(m_pattern);
+    m_pattern = 0;
+
+    context->restore();
+}
+
+} // namespace WebCore
+
+#endif
+
+// vim:ts=4:noet