2 * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
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27 #include "GeneratedImage.h"
29 #include "FloatRect.h"
30 #include "GraphicsContext.h"
31 #include "ImageBuffer.h"
37 void GeneratedImage::draw(GraphicsContext* context, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace, CompositeOperator compositeOp)
40 context->setCompositeOperation(compositeOp);
41 context->clip(dstRect);
42 context->translate(dstRect.x(), dstRect.y());
43 if (dstRect.size() != srcRect.size())
44 context->scale(FloatSize(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height()));
45 context->translate(-srcRect.x(), -srcRect.y());
46 context->fillRect(FloatRect(FloatPoint(), m_size), *m_generator.get());
50 void GeneratedImage::drawPattern(GraphicsContext* context, const FloatRect& srcRect, const AffineTransform& patternTransform,
51 const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator compositeOp, const FloatRect& destRect)
53 // Allow the generator to provide visually-equivalent tiling parameters for better performance.
54 IntSize adjustedSize = m_size;
55 FloatRect adjustedSrcRect = srcRect;
56 m_generator->adjustParametersForTiledDrawing(adjustedSize, adjustedSrcRect);
58 // Create a BitmapImage and call drawPattern on it.
59 OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(adjustedSize);
63 // Fill with the gradient.
64 GraphicsContext* graphicsContext = imageBuffer->context();
65 graphicsContext->fillRect(FloatRect(FloatPoint(), adjustedSize), *m_generator.get());
67 // Tile the image buffer into the context.
68 imageBuffer->drawPattern(context, adjustedSrcRect, patternTransform, phase, styleColorSpace, compositeOp, destRect);