/* * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. * Copyright (C) 2008 Eric Seidel <eric@webkit.org> * * 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 "Pattern.h" #include "TransformationMatrix.h" #include "GraphicsContext.h" #include <ApplicationServices/ApplicationServices.h> namespace WebCore { static void patternCallback(void* info, CGContextRef context) { CGImageRef platformImage = static_cast<Image*>(info)->getCGImageRef(); if (!platformImage) return; CGRect rect = GraphicsContext(context).roundToDevicePixels( FloatRect(0, 0, CGImageGetWidth(platformImage), CGImageGetHeight(platformImage))); CGContextDrawImage(context, rect, platformImage); } static void patternReleaseCallback(void* info) { static_cast<Image*>(info)->deref(); } CGPatternRef Pattern::createPlatformPattern(const TransformationMatrix& userSpaceTransformation) const { IntRect tileRect = tileImage()->rect(); TransformationMatrix patternTransform = m_patternSpaceTransformation; patternTransform.multiply(userSpaceTransformation); patternTransform.scaleNonUniform(1, -1); patternTransform.translate(0, -tileRect.height()); // If FLT_MAX should also be used for xStep or yStep, nothing is rendered. Using fractions of FLT_MAX also // result in nothing being rendered. // INT_MAX is almost correct, but there seems to be some number wrapping occuring making the fill // pattern is not filled correctly. // So, just pick a really large number that works. float xStep = m_repeatX ? tileRect.width() : (100000000.0f); float yStep = m_repeatY ? tileRect.height() : (100000000.0f); // The pattern will release the tile when it's done rendering in patternReleaseCallback tileImage()->ref(); const CGPatternCallbacks patternCallbacks = { 0, patternCallback, patternReleaseCallback }; return CGPatternCreate(tileImage(), tileRect, patternTransform, xStep, yStep, kCGPatternTilingConstantSpacing, TRUE, &patternCallbacks); } }