1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/basic/BasicImages.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,183 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include <stdint.h> // for uint8_t, uint32_t
1.10 +#include "BasicLayers.h" // for BasicLayerManager
1.11 +#include "ImageContainer.h" // for PlanarYCbCrImage, etc
1.12 +#include "ImageTypes.h" // for ImageFormat, etc
1.13 +#include "cairo.h" // for cairo_user_data_key_t
1.14 +#include "gfxASurface.h" // for gfxASurface, etc
1.15 +#include "gfxPlatform.h" // for gfxPlatform, gfxImageFormat
1.16 +#include "gfxUtils.h" // for gfxUtils
1.17 +#include "mozilla/mozalloc.h" // for operator delete[], etc
1.18 +#include "nsAutoPtr.h" // for nsRefPtr, nsAutoArrayPtr
1.19 +#include "nsAutoRef.h" // for nsCountedRef
1.20 +#include "nsCOMPtr.h" // for already_AddRefed
1.21 +#include "nsDebug.h" // for NS_ERROR, NS_ASSERTION
1.22 +#include "nsISupportsImpl.h" // for Image::Release, etc
1.23 +#include "nsThreadUtils.h" // for NS_IsMainThread
1.24 +#include "mozilla/gfx/Point.h" // for IntSize
1.25 +#include "gfx2DGlue.h"
1.26 +#include "YCbCrUtils.h" // for YCbCr conversions
1.27 +#ifdef XP_MACOSX
1.28 +#include "gfxQuartzImageSurface.h"
1.29 +#endif
1.30 +
1.31 +namespace mozilla {
1.32 +namespace layers {
1.33 +
1.34 +class BasicPlanarYCbCrImage : public PlanarYCbCrImage
1.35 +{
1.36 +public:
1.37 + BasicPlanarYCbCrImage(const gfx::IntSize& aScaleHint, gfxImageFormat aOffscreenFormat, BufferRecycleBin *aRecycleBin)
1.38 + : PlanarYCbCrImage(aRecycleBin)
1.39 + , mScaleHint(aScaleHint)
1.40 + , mDelayedConversion(false)
1.41 + {
1.42 + SetOffscreenFormat(aOffscreenFormat);
1.43 + }
1.44 +
1.45 + ~BasicPlanarYCbCrImage()
1.46 + {
1.47 + if (mDecodedBuffer) {
1.48 + // Right now this only happens if the Image was never drawn, otherwise
1.49 + // this will have been tossed away at surface destruction.
1.50 + mRecycleBin->RecycleBuffer(mDecodedBuffer.forget(), mSize.height * mStride);
1.51 + }
1.52 + }
1.53 +
1.54 + virtual void SetData(const Data& aData);
1.55 + virtual void SetDelayedConversion(bool aDelayed) { mDelayedConversion = aDelayed; }
1.56 +
1.57 + TemporaryRef<gfx::SourceSurface> GetAsSourceSurface();
1.58 +
1.59 + virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
1.60 + {
1.61 + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
1.62 + }
1.63 +
1.64 + virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
1.65 + {
1.66 + size_t size = PlanarYCbCrImage::SizeOfExcludingThis(aMallocSizeOf);
1.67 + size += mDecodedBuffer.SizeOfExcludingThis(aMallocSizeOf);
1.68 + return size;
1.69 + }
1.70 +
1.71 +private:
1.72 + nsAutoArrayPtr<uint8_t> mDecodedBuffer;
1.73 + gfx::IntSize mScaleHint;
1.74 + int mStride;
1.75 + bool mDelayedConversion;
1.76 +};
1.77 +
1.78 +class BasicImageFactory : public ImageFactory
1.79 +{
1.80 +public:
1.81 + BasicImageFactory() {}
1.82 +
1.83 + virtual already_AddRefed<Image> CreateImage(ImageFormat aFormat,
1.84 + const gfx::IntSize &aScaleHint,
1.85 + BufferRecycleBin *aRecycleBin)
1.86 + {
1.87 + nsRefPtr<Image> image;
1.88 + if (aFormat == ImageFormat::PLANAR_YCBCR) {
1.89 + image = new BasicPlanarYCbCrImage(aScaleHint, gfxPlatform::GetPlatform()->GetOffscreenFormat(), aRecycleBin);
1.90 + return image.forget();
1.91 + }
1.92 +
1.93 + return ImageFactory::CreateImage(aFormat, aScaleHint, aRecycleBin);
1.94 + }
1.95 +};
1.96 +
1.97 +void
1.98 +BasicPlanarYCbCrImage::SetData(const Data& aData)
1.99 +{
1.100 + PlanarYCbCrImage::SetData(aData);
1.101 +
1.102 + if (mDelayedConversion) {
1.103 + return;
1.104 + }
1.105 +
1.106 + // Do some sanity checks to prevent integer overflow
1.107 + if (aData.mYSize.width > PlanarYCbCrImage::MAX_DIMENSION ||
1.108 + aData.mYSize.height > PlanarYCbCrImage::MAX_DIMENSION) {
1.109 + NS_ERROR("Illegal image source width or height");
1.110 + return;
1.111 + }
1.112 +
1.113 + gfx::SurfaceFormat format = gfx::ImageFormatToSurfaceFormat(GetOffscreenFormat());
1.114 +
1.115 + gfx::IntSize size(mScaleHint);
1.116 + gfx::GetYCbCrToRGBDestFormatAndSize(aData, format, size);
1.117 + if (size.width > PlanarYCbCrImage::MAX_DIMENSION ||
1.118 + size.height > PlanarYCbCrImage::MAX_DIMENSION) {
1.119 + NS_ERROR("Illegal image dest width or height");
1.120 + return;
1.121 + }
1.122 +
1.123 + gfxImageFormat iFormat = gfx::SurfaceFormatToImageFormat(format);
1.124 + mStride = gfxASurface::FormatStrideForWidth(iFormat, size.width);
1.125 + mDecodedBuffer = AllocateBuffer(size.height * mStride);
1.126 + if (!mDecodedBuffer) {
1.127 + // out of memory
1.128 + return;
1.129 + }
1.130 +
1.131 + gfx::ConvertYCbCrToRGB(aData, format, size, mDecodedBuffer, mStride);
1.132 + SetOffscreenFormat(iFormat);
1.133 + mSize = size;
1.134 +}
1.135 +
1.136 +TemporaryRef<gfx::SourceSurface>
1.137 +BasicPlanarYCbCrImage::GetAsSourceSurface()
1.138 +{
1.139 + NS_ASSERTION(NS_IsMainThread(), "Must be main thread");
1.140 +
1.141 + if (mSourceSurface) {
1.142 + return mSourceSurface.get();
1.143 + }
1.144 +
1.145 + if (!mDecodedBuffer) {
1.146 + return PlanarYCbCrImage::GetAsSourceSurface();
1.147 + }
1.148 +
1.149 + gfxImageFormat format = GetOffscreenFormat();
1.150 +
1.151 + RefPtr<gfx::SourceSurface> surface;
1.152 + {
1.153 + // Create a DrawTarget so that we can own the data inside mDecodeBuffer.
1.154 + // We create the target out of mDecodedBuffer, and get a snapshot from it.
1.155 + // The draw target is destroyed on scope exit and the surface owns the data.
1.156 + RefPtr<gfx::DrawTarget> drawTarget
1.157 + = gfxPlatform::GetPlatform()->CreateDrawTargetForData(mDecodedBuffer,
1.158 + mSize,
1.159 + mStride,
1.160 + gfx::ImageFormatToSurfaceFormat(format));
1.161 + if (!drawTarget) {
1.162 + return nullptr;
1.163 + }
1.164 +
1.165 + surface = drawTarget->Snapshot();
1.166 + }
1.167 +
1.168 + mRecycleBin->RecycleBuffer(mDecodedBuffer.forget(), mSize.height * mStride);
1.169 +
1.170 + mSourceSurface = surface;
1.171 + return mSourceSurface.get();
1.172 +}
1.173 +
1.174 +
1.175 +ImageFactory*
1.176 +BasicLayerManager::GetImageFactory()
1.177 +{
1.178 + if (!mFactory) {
1.179 + mFactory = new BasicImageFactory();
1.180 + }
1.181 +
1.182 + return mFactory.get();
1.183 +}
1.184 +
1.185 +}
1.186 +}
