| // Copyright 2013 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 "core/page/ImageBitmap.h" |
| |
| #include "core/html/HTMLCanvasElement.h" |
| #include "core/html/HTMLImageElement.h" |
| #include "core/html/HTMLVideoElement.h" |
| #include "core/html/ImageData.h" |
| #include "core/html/canvas/CanvasRenderingContext.h" |
| #include "core/platform/graphics/BitmapImage.h" |
| #include "core/platform/graphics/GraphicsContext.h" |
| #include "core/platform/graphics/ImageBuffer.h" |
| #include "wtf/RefPtr.h" |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| static inline IntRect normalizeRect(const IntRect& rect) |
| { |
| return IntRect(min(rect.x(), rect.maxX()), |
| min(rect.y(), rect.maxY()), |
| max(rect.width(), -rect.width()), |
| max(rect.height(), -rect.height())); |
| } |
| |
| static inline PassRefPtr<Image> cropImage(Image* image, const IntRect& cropRect) |
| { |
| IntRect intersectRect = intersection(IntRect(IntPoint(), image->size()), cropRect); |
| if (!intersectRect.width() || !intersectRect.height()) |
| return 0; |
| |
| SkBitmap cropped; |
| image->nativeImageForCurrentFrame()->bitmap().extractSubset(&cropped, intersectRect); |
| return BitmapImage::create(NativeImageSkia::create(cropped)); |
| } |
| |
| ImageBitmap::ImageBitmap(HTMLImageElement* image, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_bitmap(0) |
| , m_imageElement(image) |
| { |
| IntRect srcRect = intersection(cropRect, IntRect(0, 0, image->width(), image->height())); |
| m_bitmapRect = IntRect(IntPoint(max(0, -cropRect.x()), max(0, -cropRect.y())), srcRect.size()); |
| m_bitmapOffset = srcRect.location(); |
| |
| if (!srcRect.width() || !srcRect.height()) |
| m_imageElement = 0; |
| else |
| m_imageElement->addClient(this); |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::ImageBitmap(HTMLVideoElement* video, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_imageElement(0) |
| , m_bitmapOffset(IntPoint()) |
| { |
| IntRect videoRect = IntRect(IntPoint(), video->player()->naturalSize()); |
| IntRect srcRect = intersection(cropRect, videoRect); |
| IntRect dstRect(IntPoint(), srcRect.size()); |
| |
| OwnPtr<ImageBuffer> buf = ImageBuffer::create(videoRect.size(), 1, UnacceleratedNonPlatformBuffer); |
| GraphicsContext* c = buf->context(); |
| c->clip(dstRect); |
| c->translate(-srcRect.x(), -srcRect.y()); |
| video->paintCurrentFrameInContext(c, videoRect); |
| m_bitmap = buf->copyImage(DontCopyBackingStore); |
| m_bitmapRect = IntRect(IntPoint(max(0, -cropRect.x()), max(0, -cropRect.y())), srcRect.size()); |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::ImageBitmap(HTMLCanvasElement* canvas, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_imageElement(0) |
| , m_bitmapOffset(IntPoint()) |
| { |
| CanvasRenderingContext* sourceContext = canvas->renderingContext(); |
| if (sourceContext && sourceContext->is3d()) |
| sourceContext->paintRenderingResultsToCanvas(); |
| |
| IntRect srcRect = intersection(cropRect, IntRect(IntPoint(), canvas->size())); |
| m_bitmapRect = IntRect(IntPoint(max(0, -cropRect.x()), max(0, -cropRect.y())), srcRect.size()); |
| m_bitmap = cropImage(canvas->buffer()->copyImage(CopyBackingStore).get(), cropRect); |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::ImageBitmap(ImageData* data, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_imageElement(0) |
| , m_bitmapOffset(IntPoint()) |
| { |
| IntRect srcRect = intersection(cropRect, IntRect(IntPoint(), data->size())); |
| |
| OwnPtr<ImageBuffer> buf = ImageBuffer::create(data->size(), 1, UnacceleratedNonPlatformBuffer); |
| if (srcRect.width() > 0 && srcRect.height() > 0) |
| buf->putByteArray(Premultiplied, data->data(), data->size(), srcRect, IntPoint(min(0, -cropRect.x()), min(0, -cropRect.y()))); |
| |
| m_bitmap = buf->copyImage(DontCopyBackingStore); |
| m_bitmapRect = IntRect(IntPoint(max(0, -cropRect.x()), max(0, -cropRect.y())), srcRect.size()); |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::ImageBitmap(ImageBitmap* bitmap, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_bitmap(0) |
| , m_imageElement(bitmap->imageElement()) |
| , m_bitmapOffset(IntPoint()) |
| { |
| IntRect oldBitmapRect = bitmap->bitmapRect(); |
| IntRect srcRect = intersection(cropRect, oldBitmapRect); |
| m_bitmapRect = IntRect(IntPoint(max(0, oldBitmapRect.x() - cropRect.x()), max(0, oldBitmapRect.y() - cropRect.y())), srcRect.size()); |
| |
| if (m_imageElement) { |
| m_imageElement->addClient(this); |
| m_bitmapOffset = srcRect.location(); |
| } else if (bitmap->bitmapImage()) { |
| IntRect adjustedCropRect(IntPoint(cropRect.x() -oldBitmapRect.x(), cropRect.y() - oldBitmapRect.y()), cropRect.size()); |
| m_bitmap = cropImage(bitmap->bitmapImage().get(), adjustedCropRect); |
| } |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::ImageBitmap(Image* image, const IntRect& cropRect) |
| : m_cropRect(cropRect) |
| , m_imageElement(0) |
| { |
| IntRect srcRect = intersection(cropRect, IntRect(IntPoint(), image->size())); |
| m_bitmap = cropImage(image, cropRect); |
| m_bitmapRect = IntRect(IntPoint(max(0, -cropRect.x()), max(0, -cropRect.y())), srcRect.size()); |
| |
| ScriptWrappable::init(this); |
| } |
| |
| ImageBitmap::~ImageBitmap() |
| { |
| if (m_imageElement) |
| m_imageElement->removeClient(this); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(HTMLImageElement* image, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(image, normalizedCropRect)); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(HTMLVideoElement* video, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(video, normalizedCropRect)); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(HTMLCanvasElement* canvas, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(canvas, normalizedCropRect)); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(ImageData* data, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(data, normalizedCropRect)); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(ImageBitmap* bitmap, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(bitmap, normalizedCropRect)); |
| } |
| |
| PassRefPtr<ImageBitmap> ImageBitmap::create(Image* image, const IntRect& cropRect) |
| { |
| IntRect normalizedCropRect = normalizeRect(cropRect); |
| return adoptRef(new ImageBitmap(image, normalizedCropRect)); |
| } |
| |
| void ImageBitmap::notifyImageSourceChanged() |
| { |
| m_bitmap = cropImage(m_imageElement->cachedImage()->image(), m_cropRect); |
| m_bitmapOffset = IntPoint(); |
| m_imageElement = 0; |
| } |
| |
| PassRefPtr<Image> ImageBitmap::bitmapImage() const |
| { |
| ASSERT((m_imageElement || m_bitmap || !m_bitmapRect.width() || !m_bitmapRect.height()) && (!m_imageElement || !m_bitmap)); |
| if (m_imageElement) |
| return m_imageElement->cachedImage()->image(); |
| return m_bitmap; |
| } |
| |
| } |