| /* |
| * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| * Copyright (C) 2008, 2009 Google, Inc. |
| * |
| * 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 "platform/image-decoders/ImageFrame.h" |
| |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/graphics/skia/SkiaUtils.h" |
| #include "platform/image-decoders/ImageDecoder.h" |
| |
| namespace blink { |
| |
| ImageFrame::ImageFrame() |
| : m_allocator(0), |
| m_hasAlpha(true), |
| m_status(FrameEmpty), |
| m_duration(0), |
| m_disposalMethod(DisposeNotSpecified), |
| m_alphaBlendSource(BlendAtopPreviousFrame), |
| m_premultiplyAlpha(true), |
| m_pixelsChanged(false), |
| m_requiredPreviousFrameIndex(kNotFound) {} |
| |
| ImageFrame& ImageFrame::operator=(const ImageFrame& other) { |
| if (this == &other) |
| return *this; |
| |
| m_bitmap = other.m_bitmap; |
| // Keep the pixels locked since we will be writing directly into the |
| // bitmap throughout this object's lifetime. |
| m_bitmap.lockPixels(); |
| // Be sure to assign this before calling setStatus(), since setStatus() may |
| // call notifyBitmapIfPixelsChanged(). |
| m_pixelsChanged = other.m_pixelsChanged; |
| setMemoryAllocator(other.allocator()); |
| setOriginalFrameRect(other.originalFrameRect()); |
| setStatus(other.getStatus()); |
| setDuration(other.duration()); |
| setDisposalMethod(other.getDisposalMethod()); |
| setAlphaBlendSource(other.getAlphaBlendSource()); |
| setPremultiplyAlpha(other.premultiplyAlpha()); |
| // Be sure that this is called after we've called setStatus(), since we |
| // look at our status to know what to do with the alpha value. |
| setHasAlpha(other.hasAlpha()); |
| setRequiredPreviousFrameIndex(other.requiredPreviousFrameIndex()); |
| return *this; |
| } |
| |
| void ImageFrame::clearPixelData() { |
| m_bitmap.reset(); |
| m_status = FrameEmpty; |
| // NOTE: Do not reset other members here; clearFrameBufferCache() |
| // calls this to free the bitmap data, but other functions like |
| // initFrameBuffer() and frameComplete() may still need to read |
| // other metadata out of this frame later. |
| } |
| |
| void ImageFrame::zeroFillPixelData() { |
| m_bitmap.eraseARGB(0, 0, 0, 0); |
| m_hasAlpha = true; |
| } |
| |
| bool ImageFrame::copyBitmapData(const ImageFrame& other) { |
| DCHECK_NE(this, &other); |
| m_hasAlpha = other.m_hasAlpha; |
| m_bitmap.reset(); |
| return other.m_bitmap.copyTo(&m_bitmap, other.m_bitmap.colorType()); |
| } |
| |
| bool ImageFrame::takeBitmapDataIfWritable(ImageFrame* other) { |
| DCHECK(other); |
| DCHECK_EQ(FrameComplete, other->m_status); |
| DCHECK_EQ(FrameEmpty, m_status); |
| DCHECK_NE(this, other); |
| if (other->m_bitmap.isImmutable()) |
| return false; |
| m_hasAlpha = other->m_hasAlpha; |
| m_bitmap.reset(); |
| m_bitmap.swap(other->m_bitmap); |
| other->m_status = FrameEmpty; |
| return true; |
| } |
| |
| bool ImageFrame::setSizeAndColorSpace(int newWidth, |
| int newHeight, |
| sk_sp<SkColorSpace> colorSpace) { |
| // setSizeAndColorSpace() should only be called once, it leaks memory |
| // otherwise. |
| DCHECK(!width() && !height()); |
| |
| // The image must specify a color space. |
| // TODO(ccameron): This should be set unconditionally, but specifying a |
| // non-renderable SkColorSpace results in errors. |
| // https://bugs.chromium.org/p/skia/issues/detail?id=5907 |
| if (RuntimeEnabledFeatures::colorCorrectRenderingEnabled()) { |
| DCHECK(colorSpace); |
| m_colorSpace = std::move(colorSpace); |
| } else { |
| DCHECK(!colorSpace); |
| } |
| |
| m_bitmap.setInfo(SkImageInfo::MakeN32( |
| newWidth, newHeight, |
| m_premultiplyAlpha ? kPremul_SkAlphaType : kUnpremul_SkAlphaType, |
| std::move(colorSpace))); |
| if (!m_bitmap.tryAllocPixels(m_allocator, 0)) |
| return false; |
| |
| zeroFillPixelData(); |
| return true; |
| } |
| |
| bool ImageFrame::hasAlpha() const { |
| return m_hasAlpha; |
| } |
| |
| sk_sp<SkImage> ImageFrame::finalizePixelsAndGetImage() { |
| DCHECK_EQ(FrameComplete, m_status); |
| m_bitmap.setImmutable(); |
| return SkImage::MakeFromBitmap(m_bitmap); |
| } |
| |
| void ImageFrame::setHasAlpha(bool alpha) { |
| m_hasAlpha = alpha; |
| |
| m_bitmap.setAlphaType(computeAlphaType()); |
| } |
| |
| void ImageFrame::setStatus(Status status) { |
| m_status = status; |
| if (m_status == FrameComplete) { |
| m_bitmap.setAlphaType(computeAlphaType()); |
| // Send pending pixels changed notifications now, because we can't do |
| // this after the bitmap has been marked immutable. We don't set the |
| // bitmap immutable here because it would defeat |
| // takeBitmapDataIfWritable(). Instead we let the bitmap stay mutable |
| // until someone calls finalizePixelsAndGetImage() to actually get the |
| // SkImage. |
| notifyBitmapIfPixelsChanged(); |
| } |
| } |
| |
| void ImageFrame::zeroFillFrameRect(const IntRect& rect) { |
| if (rect.isEmpty()) |
| return; |
| |
| m_bitmap.eraseArea(rect, SkColorSetARGB(0, 0, 0, 0)); |
| setHasAlpha(true); |
| } |
| |
| SkAlphaType ImageFrame::computeAlphaType() const { |
| // If the frame is not fully loaded, there will be transparent pixels, |
| // so we can't tell skia we're opaque, even for image types that logically |
| // always are (e.g. jpeg). |
| if (!m_hasAlpha && m_status == FrameComplete) |
| return kOpaque_SkAlphaType; |
| |
| return m_premultiplyAlpha ? kPremul_SkAlphaType : kUnpremul_SkAlphaType; |
| } |
| |
| } // namespace blink |