1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/CopyableCanvasLayer.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,200 @@
1.4 +/* -*- Mode: C++; tab-width: 2; 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 "BasicLayersImpl.h" // for FillWithMask, etc
1.10 +#include "CopyableCanvasLayer.h"
1.11 +#include "GLContext.h" // for GLContext
1.12 +#include "GLScreenBuffer.h" // for GLScreenBuffer
1.13 +#include "SharedSurface.h" // for SharedSurface
1.14 +#include "SharedSurfaceGL.h" // for SharedSurface_GL, etc
1.15 +#include "SurfaceTypes.h" // for APITypeT, APITypeT::OpenGL, etc
1.16 +#include "gfxMatrix.h" // for gfxMatrix
1.17 +#include "gfxPattern.h" // for gfxPattern, etc
1.18 +#include "gfxPlatform.h" // for gfxPlatform, gfxImageFormat
1.19 +#include "gfxRect.h" // for gfxRect
1.20 +#include "gfxUtils.h" // for gfxUtils
1.21 +#include "gfx2DGlue.h" // for thebes --> moz2d transition
1.22 +#include "mozilla/gfx/BaseSize.h" // for BaseSize
1.23 +#include "nsDebug.h" // for NS_ASSERTION, NS_WARNING, etc
1.24 +#include "nsISupportsImpl.h" // for gfxContext::AddRef, etc
1.25 +#include "nsRect.h" // for nsIntRect
1.26 +#include "nsSize.h" // for nsIntSize
1.27 +#include "LayerUtils.h"
1.28 +
1.29 +using namespace mozilla::gfx;
1.30 +using namespace mozilla::gl;
1.31 +
1.32 +namespace mozilla {
1.33 +namespace layers {
1.34 +
1.35 +CopyableCanvasLayer::CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData) :
1.36 + CanvasLayer(aLayerManager, aImplData)
1.37 + , mStream(nullptr)
1.38 +{
1.39 + MOZ_COUNT_CTOR(CopyableCanvasLayer);
1.40 +}
1.41 +
1.42 +CopyableCanvasLayer::~CopyableCanvasLayer()
1.43 +{
1.44 + MOZ_COUNT_DTOR(CopyableCanvasLayer);
1.45 +}
1.46 +
1.47 +void
1.48 +CopyableCanvasLayer::Initialize(const Data& aData)
1.49 +{
1.50 + NS_ASSERTION(mSurface == nullptr, "BasicCanvasLayer::Initialize called twice!");
1.51 +
1.52 + if (aData.mGLContext) {
1.53 + mGLContext = aData.mGLContext;
1.54 + mStream = aData.mStream;
1.55 + mIsGLAlphaPremult = aData.mIsGLAlphaPremult;
1.56 + mNeedsYFlip = true;
1.57 + MOZ_ASSERT(mGLContext->IsOffscreen(), "canvas gl context isn't offscreen");
1.58 +
1.59 + // [Basic Layers, non-OMTC] WebGL layer init.
1.60 + // `GLScreenBuffer::Morph`ing is only needed in BasicShadowableCanvasLayer.
1.61 + } else if (aData.mDrawTarget) {
1.62 + mDrawTarget = aData.mDrawTarget;
1.63 + mSurface = mDrawTarget->Snapshot();
1.64 + mNeedsYFlip = false;
1.65 + } else {
1.66 + NS_ERROR("CanvasLayer created without mSurface, mDrawTarget or mGLContext?");
1.67 + }
1.68 +
1.69 + mBounds.SetRect(0, 0, aData.mSize.width, aData.mSize.height);
1.70 +}
1.71 +
1.72 +bool
1.73 +CopyableCanvasLayer::IsDataValid(const Data& aData)
1.74 +{
1.75 + return mGLContext == aData.mGLContext && mStream == aData.mStream;
1.76 +}
1.77 +
1.78 +void
1.79 +CopyableCanvasLayer::UpdateTarget(DrawTarget* aDestTarget)
1.80 +{
1.81 + if (!IsDirty())
1.82 + return;
1.83 + Painted();
1.84 +
1.85 + if (mDrawTarget) {
1.86 + mDrawTarget->Flush();
1.87 + mSurface = mDrawTarget->Snapshot();
1.88 + }
1.89 +
1.90 + if (!mGLContext && aDestTarget) {
1.91 + NS_ASSERTION(mSurface, "Must have surface to draw!");
1.92 + if (mSurface) {
1.93 + aDestTarget->CopySurface(mSurface,
1.94 + IntRect(0, 0, mBounds.width, mBounds.height),
1.95 + IntPoint(0, 0));
1.96 + }
1.97 + return;
1.98 + }
1.99 +
1.100 + if (mGLContext) {
1.101 + RefPtr<DataSourceSurface> readSurf;
1.102 + RefPtr<SourceSurface> resultSurf;
1.103 +
1.104 + SharedSurface_GL* sharedSurf = nullptr;
1.105 + if (mStream) {
1.106 + sharedSurf = SharedSurface_GL::Cast(mStream->SwapConsumer());
1.107 + } else {
1.108 + sharedSurf = mGLContext->RequestFrame();
1.109 + }
1.110 +
1.111 + if (!sharedSurf) {
1.112 + NS_WARNING("Null frame received.");
1.113 + return;
1.114 + }
1.115 +
1.116 + IntSize readSize(sharedSurf->Size());
1.117 + SurfaceFormat format = (GetContentFlags() & CONTENT_OPAQUE)
1.118 + ? SurfaceFormat::B8G8R8X8
1.119 + : SurfaceFormat::B8G8R8A8;
1.120 +
1.121 + if (aDestTarget) {
1.122 + resultSurf = aDestTarget->Snapshot();
1.123 + if (!resultSurf) {
1.124 + resultSurf = GetTempSurface(readSize, format);
1.125 + }
1.126 + } else {
1.127 + resultSurf = GetTempSurface(readSize, format);
1.128 + }
1.129 + MOZ_ASSERT(resultSurf);
1.130 + MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
1.131 + SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);
1.132 +
1.133 + if (surfGL->Type() == SharedSurfaceType::Basic) {
1.134 + // sharedSurf_Basic->mData must outlive readSurf. Alas, readSurf may not
1.135 + // leave the scope it was declared in.
1.136 + SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
1.137 + readSurf = sharedSurf_Basic->GetData();
1.138 + } else {
1.139 + if (resultSurf->GetSize() != readSize ||
1.140 + !(readSurf = resultSurf->GetDataSurface()) ||
1.141 + readSurf->GetFormat() != format)
1.142 + {
1.143 + readSurf = GetTempSurface(readSize, format);
1.144 + }
1.145 +
1.146 + // Readback handles Flush/MarkDirty.
1.147 + mGLContext->Screen()->Readback(surfGL, readSurf);
1.148 + }
1.149 + MOZ_ASSERT(readSurf);
1.150 +
1.151 + bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
1.152 + if (needsPremult) {
1.153 + PremultiplySurface(readSurf);
1.154 + }
1.155 +
1.156 + if (readSurf != resultSurf) {
1.157 + RefPtr<DataSourceSurface> resultDataSurface =
1.158 + resultSurf->GetDataSurface();
1.159 + RefPtr<DrawTarget> dt =
1.160 + Factory::CreateDrawTargetForData(BackendType::CAIRO,
1.161 + resultDataSurface->GetData(),
1.162 + resultDataSurface->GetSize(),
1.163 + resultDataSurface->Stride(),
1.164 + resultDataSurface->GetFormat());
1.165 + IntSize readSize = readSurf->GetSize();
1.166 + dt->CopySurface(readSurf,
1.167 + IntRect(0, 0, readSize.width, readSize.height),
1.168 + IntPoint(0, 0));
1.169 + }
1.170 +
1.171 + // If !aDestSurface then we will end up painting using mSurface, so
1.172 + // stick our surface into mSurface, so that the Paint() path is the same.
1.173 + if (!aDestTarget) {
1.174 + mSurface = resultSurf;
1.175 + }
1.176 + }
1.177 +}
1.178 +
1.179 +DataSourceSurface*
1.180 +CopyableCanvasLayer::GetTempSurface(const IntSize& aSize,
1.181 + const SurfaceFormat aFormat)
1.182 +{
1.183 + if (!mCachedTempSurface ||
1.184 + aSize.width != mCachedSize.width ||
1.185 + aSize.height != mCachedSize.height ||
1.186 + aFormat != mCachedFormat)
1.187 + {
1.188 + mCachedTempSurface = Factory::CreateDataSourceSurface(aSize, aFormat);
1.189 + mCachedSize = aSize;
1.190 + mCachedFormat = aFormat;
1.191 + }
1.192 +
1.193 + return mCachedTempSurface;
1.194 +}
1.195 +
1.196 +void
1.197 +CopyableCanvasLayer::DiscardTempSurface()
1.198 +{
1.199 + mCachedTempSurface = nullptr;
1.200 +}
1.201 +
1.202 +}
1.203 +}
