third_party/WebKit/Source/platform/graphics/Pattern.cpp

   1 /*
   2  * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
   3  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
   4  * Copyright (C) 2013 Google, Inc. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "config.h"
  29 #include "platform/graphics/Pattern.h"
  30
  31 #include "platform/graphics/ImagePattern.h"
  32 #include "platform/graphics/PicturePattern.h"
  33 #include "third_party/skia/include/core/SkImage.h"
  34 #include "third_party/skia/include/core/SkPicture.h"
  35 #include "third_party/skia/include/core/SkShader.h"
  36 #include <v8.h>
  37
  38 namespace blink {
  39
  40 PassRefPtr<Pattern> Pattern::createImagePattern(PassRefPtr<Image> tileImage, RepeatMode repeatMode)
  41 {
  42     return ImagePattern::create(tileImage, repeatMode);
  43 }
  44
  45 PassRefPtr<Pattern> Pattern::createPicturePattern(PassRefPtr<const SkPicture> picture,
  46     RepeatMode repeatMode)
  47 {
  48     return PicturePattern::create(picture, repeatMode);
  49 }
  50
  51 Pattern::Pattern(RepeatMode repeatMode, int64_t externalMemoryAllocated)
  52     : m_repeatMode(repeatMode)
  53     , m_externalMemoryAllocated(0)
  54 {
  55     adjustExternalMemoryAllocated(externalMemoryAllocated);
  56 }
  57
  58 Pattern::~Pattern()
  59 {
  60     adjustExternalMemoryAllocated(-m_externalMemoryAllocated);
  61 }
  62
  63 SkShader* Pattern::shader()
  64 {
  65     if (!m_pattern) {
  66         m_pattern = createShader();
  67     }
  68
  69     return m_pattern.get();
  70 }
  71
  72 void Pattern::setPatternSpaceTransform(const AffineTransform& patternSpaceTransformation)
  73 {
  74     if (patternSpaceTransformation == m_patternSpaceTransformation)
  75         return;
  76
  77     m_patternSpaceTransformation = patternSpaceTransformation;
  78     m_pattern.clear();
  79 }
  80
  81 void Pattern::adjustExternalMemoryAllocated(int64_t delta)
  82 {
  83     delta = std::max(-m_externalMemoryAllocated, delta);
  84
  85     v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(delta);
  86
  87     m_externalMemoryAllocated += delta;
  88 }
  89
  90 } // namespace blink