18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2008 Eric Seidel <eric@webkit.org> 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met: 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer. 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * documentation and/or other materials provided with the distribution. 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "Pattern.h" 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 308a0914b749bbe7da7768e07a7db5c6d4bb09472bSteve Block#include "AffineTransform.h" 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "GraphicsContext.h" 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <ApplicationServices/ApplicationServices.h> 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectstatic void patternCallback(void* info, CGContextRef context) 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CGImageRef platformImage = static_cast<Image*>(info)->getCGImageRef(); 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!platformImage) 418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CGRect rect = GraphicsContext(context).roundToDevicePixels( 448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project FloatRect(0, 0, CGImageGetWidth(platformImage), CGImageGetHeight(platformImage))); 458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CGContextDrawImage(context, rect, platformImage); 468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectstatic void patternReleaseCallback(void* info) 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project static_cast<Image*>(info)->deref(); 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 538a0914b749bbe7da7768e07a7db5c6d4bb09472bSteve BlockCGPatternRef Pattern::createPlatformPattern(const AffineTransform& userSpaceTransformation) const 548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 558e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project IntRect tileRect = tileImage()->rect(); 568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 57ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch AffineTransform patternTransform = userSpaceTransformation * m_patternSpaceTransformation; 588f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian patternTransform.scaleNonUniform(1, -1); 598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project patternTransform.translate(0, -tileRect.height()); 608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // If FLT_MAX should also be used for xStep or yStep, nothing is rendered. Using fractions of FLT_MAX also 628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // result in nothing being rendered. 63d0825bca7fe65beaee391d30da42e937db621564Steve Block // INT_MAX is almost correct, but there seems to be some number wrapping occurring making the fill 640bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // pattern is not filled correctly. 650bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // To make error of floating point less than 0.5, we use the half of the number of mantissa of float (1 << 22). 660bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch CGFloat xStep = m_repeatX ? tileRect.width() : (1 << 22); 670bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch CGFloat yStep = m_repeatY ? tileRect.height() : (1 << 22); 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The pattern will release the tile when it's done rendering in patternReleaseCallback 708e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project tileImage()->ref(); 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const CGPatternCallbacks patternCallbacks = { 0, patternCallback, patternReleaseCallback }; 738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return CGPatternCreate(tileImage(), tileRect, patternTransform, xStep, yStep, 748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project kCGPatternTilingConstantSpacing, TRUE, &patternCallbacks); 758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 78