2 * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
27 #include "GeneratedImage.h"
29 #include "FloatRect.h"
30 #include "GraphicsContext.h"
31 #include "ImageBuffer.h"
36 void GeneratedImage::draw(GraphicsContext* context, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace, CompositeOperator compositeOp)
38 GraphicsContextStateSaver stateSaver(*context);
39 context->setCompositeOperation(compositeOp);
40 context->clip(dstRect);
41 context->translate(dstRect.x(), dstRect.y());
42 if (dstRect.size() != srcRect.size())
43 context->scale(FloatSize(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height()));
44 context->translate(-srcRect.x(), -srcRect.y());
45 context->fillRect(FloatRect(FloatPoint(), m_size), *m_generator.get());
48 void GeneratedImage::drawPattern(GraphicsContext* context, const FloatRect& srcRect, const AffineTransform& patternTransform,
49 const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator compositeOp, const FloatRect& destRect)
51 // Allow the generator to provide visually-equivalent tiling parameters for better performance.
52 IntSize adjustedSize = m_size;
53 FloatRect adjustedSrcRect = srcRect;
54 m_generator->adjustParametersForTiledDrawing(adjustedSize, adjustedSrcRect);
56 // Create a BitmapImage and call drawPattern on it.
57 OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(adjustedSize);
61 // Fill with the gradient.
62 GraphicsContext* graphicsContext = imageBuffer->context();
63 graphicsContext->fillRect(FloatRect(FloatPoint(), adjustedSize), *m_generator.get());
65 // Tile the image buffer into the context.
66 imageBuffer->drawPattern(context, adjustedSrcRect, patternTransform, phase, styleColorSpace, compositeOp, destRect);
69 void GeneratedImage::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
71 Image::computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
72 intrinsicRatio = FloatSize();