SkImage-only bitmap patterns

Source/platform/graphics/StaticBitmapPattern.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-#include "platform/graphics/StaticBitmapPattern.h"
-
-#include "platform/graphics/skia/SkiaUtils.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkImage.h"
-#include "third_party/skia/include/core/SkShader.h"
-
-namespace blink {
-
-PassRefPtr<Pattern> StaticBitmapPattern::create(PassRefPtr<Image> tileImage, RepeatMode repeatMode)
-{
-    return adoptRef(new StaticBitmapPattern(tileImage->imageForCurrentFrame(), repeatMode));
-}
-
-StaticBitmapPattern::StaticBitmapPattern(PassRefPtr<SkImage> image, RepeatMode repeatMode)
-: BitmapPatternBase(repeatMode, 0)
-{
-    if (image) {
-        m_tileImage = image;
-        adjustExternalMemoryAllocated(m_tileImage->width() * m_tileImage->height() * 4);
-    }
-}
-
-StaticBitmapPattern::~StaticBitmapPattern() { }
-
-PassRefPtr<SkShader> StaticBitmapPattern::createShader()
-{
-    // If we have no image, return null
-    if (!m_tileImage) {
-        return adoptRef(SkShader::CreateColorShader(SK_ColorTRANSPARENT));
-    }
-
-    SkMatrix localMatrix = affineTransformToSkMatrix(m_patternSpaceTransformation);
-
-    if (isRepeatXY()) {
-        return adoptRef(m_tileImage->newShader(SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &localMatrix));
-    }
-
-    return BitmapPatternBase::createShader();
-}
-
-SkImageInfo StaticBitmapPattern::getBitmapInfo()
-{
-    return SkImageInfo::MakeN32Premul(m_tileImage->width(), m_tileImage->height());
-}
-
-void StaticBitmapPattern::drawBitmapToCanvas(SkCanvas& canvas, SkPaint& paint)
-{
-    canvas.drawImage(m_tileImage.get(), SkIntToScalar(0), SkIntToScalar(0), &paint);
-}
-
-} // namespace