diff options
Diffstat (limited to 'gfx/layers/opengl/CompositorOGL.cpp')
| -rw-r--r-- | gfx/layers/opengl/CompositorOGL.cpp | 1747 |
1 files changed, 1747 insertions, 0 deletions
diff --git a/gfx/layers/opengl/CompositorOGL.cpp b/gfx/layers/opengl/CompositorOGL.cpp new file mode 100644 index 0000000000..e435b7ed1d --- /dev/null +++ b/gfx/layers/opengl/CompositorOGL.cpp @@ -0,0 +1,1747 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "CompositorOGL.h" +#include <stddef.h> // for size_t +#include <stdint.h> // for uint32_t, uint8_t +#include <stdlib.h> // for free, malloc +#include "GLContextProvider.h" // for GLContextProvider +#include "GLContext.h" // for GLContext +#include "GLUploadHelpers.h" +#include "gfxCrashReporterUtils.h" // for ScopedGfxFeatureReporter +#include "gfxEnv.h" // for gfxEnv +#include "gfxPlatform.h" // for gfxPlatform +#include "gfxRect.h" // for gfxRect +#include "gfxUtils.h" // for gfxUtils, etc +#include "mozilla/ArrayUtils.h" // for ArrayLength +#include "mozilla/Preferences.h" // for Preferences +#include "mozilla/ProfilerLabels.h" +#include "mozilla/StaticPrefs_gfx.h" +#include "mozilla/StaticPrefs_layers.h" +#include "mozilla/StaticPrefs_nglayout.h" +#include "mozilla/gfx/BasePoint.h" // for BasePoint +#include "mozilla/gfx/Matrix.h" // for Matrix4x4, Matrix +#include "mozilla/gfx/Triangle.h" // for Triangle +#include "mozilla/gfx/gfxVars.h" // for gfxVars +#include "mozilla/layers/ImageDataSerializer.h" +#include "mozilla/layers/NativeLayer.h" +#include "mozilla/layers/CompositingRenderTargetOGL.h" +#include "mozilla/layers/Effects.h" // for EffectChain, TexturedEffect, etc +#include "mozilla/layers/TextureHost.h" // for TextureSource, etc +#include "mozilla/layers/TextureHostOGL.h" // for TextureSourceOGL, etc +#include "mozilla/layers/PTextureParent.h" // for OtherPid() on PTextureParent +#include "mozilla/mozalloc.h" // for operator delete, etc +#include "nsAppRunner.h" +#include "nsAString.h" +#include "nsClassHashtable.h" +#include "nsIConsoleService.h" // for nsIConsoleService, etc +#include "nsIWidget.h" // for nsIWidget +#include "nsLiteralString.h" // for NS_LITERAL_STRING +#include "nsMathUtils.h" // for NS_roundf +#include "nsRect.h" // for mozilla::gfx::IntRect +#include "nsServiceManagerUtils.h" // for do_GetService +#include "nsString.h" // for nsString, nsAutoCString, etc +#include "OGLShaderProgram.h" // for ShaderProgramOGL, etc +#include "ScopedGLHelpers.h" +#include "GLReadTexImageHelper.h" +#include "HeapCopyOfStackArray.h" +#include "GLBlitHelper.h" +#include "mozilla/gfx/Swizzle.h" +#ifdef MOZ_WIDGET_GTK +# include "mozilla/widget/GtkCompositorWidget.h" +#endif +#if MOZ_WIDGET_ANDROID +# include "GLContextEGL.h" +# include "GLLibraryEGL.h" +# include "mozilla/java/GeckoSurfaceTextureWrappers.h" +# include "mozilla/layers/AndroidHardwareBuffer.h" +#endif + +namespace mozilla { + +using namespace gfx; + +namespace layers { + +using namespace mozilla::gl; + +static const GLuint kCoordinateAttributeIndex = 0; +static const GLuint kTexCoordinateAttributeIndex = 1; + +class DummyTextureSourceOGL : public TextureSource, public TextureSourceOGL { + public: + const char* Name() const override { return "DummyTextureSourceOGL"; } + + TextureSourceOGL* AsSourceOGL() override { return this; } + + void BindTexture(GLenum activetex, + gfx::SamplingFilter aSamplingFilter) override {} + + bool IsValid() const override { return false; } + + gfx::IntSize GetSize() const override { return gfx::IntSize(); } + + gfx::SurfaceFormat GetFormat() const override { + return gfx::SurfaceFormat::B8G8R8A8; + } + + GLenum GetWrapMode() const override { return LOCAL_GL_CLAMP_TO_EDGE; } + + protected: +}; + +class AsyncReadbackBufferOGL final : public AsyncReadbackBuffer { + public: + AsyncReadbackBufferOGL(GLContext* aGL, const IntSize& aSize); + + bool MapAndCopyInto(DataSourceSurface* aSurface, + const IntSize& aReadSize) const override; + + void Bind() const { + mGL->fBindBuffer(LOCAL_GL_PIXEL_PACK_BUFFER, mBufferHandle); + mGL->fPixelStorei(LOCAL_GL_PACK_ALIGNMENT, 1); + } + + protected: + virtual ~AsyncReadbackBufferOGL(); + + private: + GLContext* mGL; + GLuint mBufferHandle; +}; + +AsyncReadbackBufferOGL::AsyncReadbackBufferOGL(GLContext* aGL, + const IntSize& aSize) + : AsyncReadbackBuffer(aSize), mGL(aGL), mBufferHandle(0) { + size_t bufferByteCount = mSize.width * mSize.height * 4; + mGL->fGenBuffers(1, &mBufferHandle); + + ScopedPackState scopedPackState(mGL); + Bind(); + mGL->fBufferData(LOCAL_GL_PIXEL_PACK_BUFFER, bufferByteCount, nullptr, + LOCAL_GL_STREAM_READ); +} + +AsyncReadbackBufferOGL::~AsyncReadbackBufferOGL() { + if (mGL && mGL->MakeCurrent()) { + mGL->fDeleteBuffers(1, &mBufferHandle); + } +} + +bool AsyncReadbackBufferOGL::MapAndCopyInto(DataSourceSurface* aSurface, + const IntSize& aReadSize) const { + MOZ_RELEASE_ASSERT(aReadSize <= aSurface->GetSize()); + + if (!mGL || !mGL->MakeCurrent()) { + return false; + } + + ScopedPackState scopedPackState(mGL); + Bind(); + + const uint8_t* srcData = nullptr; + if (mGL->IsSupported(GLFeature::map_buffer_range)) { + srcData = static_cast<uint8_t*>(mGL->fMapBufferRange( + LOCAL_GL_PIXEL_PACK_BUFFER, 0, aReadSize.height * aReadSize.width * 4, + LOCAL_GL_MAP_READ_BIT)); + } else { + srcData = static_cast<uint8_t*>( + mGL->fMapBuffer(LOCAL_GL_PIXEL_PACK_BUFFER, LOCAL_GL_READ_ONLY)); + } + + if (!srcData) { + return false; + } + + int32_t srcStride = mSize.width * 4; // Bind() sets an alignment of 1 + DataSourceSurface::ScopedMap map(aSurface, DataSourceSurface::WRITE); + uint8_t* destData = map.GetData(); + int32_t destStride = map.GetStride(); + SurfaceFormat destFormat = aSurface->GetFormat(); + for (int32_t destRow = 0; destRow < aReadSize.height; destRow++) { + // Turn srcData upside down during the copy. + int32_t srcRow = aReadSize.height - 1 - destRow; + const uint8_t* src = &srcData[srcRow * srcStride]; + uint8_t* dest = &destData[destRow * destStride]; + SwizzleData(src, srcStride, SurfaceFormat::R8G8B8A8, dest, destStride, + destFormat, IntSize(aReadSize.width, 1)); + } + + mGL->fUnmapBuffer(LOCAL_GL_PIXEL_PACK_BUFFER); + + return true; +} + +PerUnitTexturePoolOGL::PerUnitTexturePoolOGL(gl::GLContext* aGL) + : mTextureTarget(0), // zero is never a valid texture target + mGL(aGL) {} + +PerUnitTexturePoolOGL::~PerUnitTexturePoolOGL() { DestroyTextures(); } + +CompositorOGL::CompositorOGL(widget::CompositorWidget* aWidget, + int aSurfaceWidth, int aSurfaceHeight, + bool aUseExternalSurfaceSize) + : Compositor(aWidget), + mWidgetSize(-1, -1), + mSurfaceSize(aSurfaceWidth, aSurfaceHeight), + mFBOTextureTarget(0), + mWindowRenderTarget(nullptr), + mQuadVBO(0), + mTriangleVBO(0), + mPreviousFrameDoneSync(nullptr), + mThisFrameDoneSync(nullptr), + mHasBGRA(0), + mUseExternalSurfaceSize(aUseExternalSurfaceSize), + mFrameInProgress(false), + mDestroyed(false), + mViewportSize(0, 0) { + if (aWidget->GetNativeLayerRoot()) { + // We can only render into native layers, our GLContext won't have a usable + // default framebuffer. + mCanRenderToDefaultFramebuffer = false; + } + MOZ_COUNT_CTOR(CompositorOGL); +} + +CompositorOGL::~CompositorOGL() { MOZ_COUNT_DTOR(CompositorOGL); } + +already_AddRefed<mozilla::gl::GLContext> CompositorOGL::CreateContext() { + RefPtr<GLContext> context; + + // Used by mock widget to create an offscreen context + nsIWidget* widget = mWidget->RealWidget(); + void* widgetOpenGLContext = + widget ? widget->GetNativeData(NS_NATIVE_OPENGL_CONTEXT) : nullptr; + if (widgetOpenGLContext) { + GLContext* alreadyRefed = reinterpret_cast<GLContext*>(widgetOpenGLContext); + return already_AddRefed<GLContext>(alreadyRefed); + } + +#ifdef XP_WIN + if (gfxEnv::MOZ_LAYERS_PREFER_EGL()) { + printf_stderr("Trying GL layers...\n"); + context = gl::GLContextProviderEGL::CreateForCompositorWidget( + mWidget, /* aHardwareWebRender */ false, /* aForceAccelerated */ false); + } +#endif + + // Allow to create offscreen GL context for main Layer Manager + if (!context && gfxEnv::MOZ_LAYERS_PREFER_OFFSCREEN()) { + nsCString discardFailureId; + context = GLContextProvider::CreateHeadless( + {CreateContextFlags::REQUIRE_COMPAT_PROFILE}, &discardFailureId); + if (!context->CreateOffscreenDefaultFb(mSurfaceSize)) { + context = nullptr; + } + } + + if (!context) { + context = gl::GLContextProvider::CreateForCompositorWidget( + mWidget, + /* aHardwareWebRender */ false, + gfxVars::RequiresAcceleratedGLContextForCompositorOGL()); + } + + if (!context) { + NS_WARNING("Failed to create CompositorOGL context"); + } + + return context.forget(); +} + +void CompositorOGL::Destroy() { + Compositor::Destroy(); + + if (mTexturePool) { + mTexturePool->Clear(); + mTexturePool = nullptr; + } + + if (!mDestroyed) { + mDestroyed = true; + CleanupResources(); + } +} + +void CompositorOGL::CleanupResources() { + if (!mGLContext) return; + + if (mSurfacePoolHandle) { + mSurfacePoolHandle->Pool()->DestroyGLResourcesForContext(mGLContext); + mSurfacePoolHandle = nullptr; + } + + RefPtr<GLContext> ctx = mGLContext->GetSharedContext(); + if (!ctx) { + ctx = mGLContext; + } + + if (!ctx->MakeCurrent()) { + // Leak resources! + mQuadVBO = 0; + mTriangleVBO = 0; + mPreviousFrameDoneSync = nullptr; + mThisFrameDoneSync = nullptr; + mProgramsHolder = nullptr; + mGLContext = nullptr; + mNativeLayersReferenceRT = nullptr; + mFullWindowRenderTarget = nullptr; + return; + } + + mProgramsHolder = nullptr; + mNativeLayersReferenceRT = nullptr; + mFullWindowRenderTarget = nullptr; + +#ifdef MOZ_WIDGET_GTK + // TextureSources might hold RefPtr<gl::GLContext>. + // All of them needs to be released to destroy GLContext. + // GLContextGLX has to be destroyed before related gtk window is destroyed. + for (auto textureSource : mRegisteredTextureSources) { + textureSource->DeallocateDeviceData(); + } + mRegisteredTextureSources.clear(); +#endif + + ctx->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0); + + if (mQuadVBO) { + ctx->fDeleteBuffers(1, &mQuadVBO); + mQuadVBO = 0; + } + + if (mTriangleVBO) { + ctx->fDeleteBuffers(1, &mTriangleVBO); + mTriangleVBO = 0; + } + + mGLContext->MakeCurrent(); + + if (mPreviousFrameDoneSync) { + mGLContext->fDeleteSync(mPreviousFrameDoneSync); + mPreviousFrameDoneSync = nullptr; + } + + if (mThisFrameDoneSync) { + mGLContext->fDeleteSync(mThisFrameDoneSync); + mThisFrameDoneSync = nullptr; + } + + if (mOwnsGLContext) { + // On the main thread the Widget will be destroyed soon and calling + // MakeCurrent after that could cause a crash (at least with GLX, see bug + // 1059793), unless context is marked as destroyed. There may be some + // textures still alive that will try to call MakeCurrent on the context so + // let's make sure it is marked destroyed now. + mGLContext->MarkDestroyed(); + } + + mGLContext = nullptr; +} + +bool CompositorOGL::Initialize(GLContext* aGLContext, + RefPtr<ShaderProgramOGLsHolder> aProgramsHolder, + nsCString* const out_failureReason) { + MOZ_ASSERT(!mDestroyed); + MOZ_ASSERT(!mGLContext); + + mGLContext = aGLContext; + mProgramsHolder = aProgramsHolder; + mOwnsGLContext = false; + + return Initialize(out_failureReason); +} + +bool CompositorOGL::Initialize(nsCString* const out_failureReason) { + ScopedGfxFeatureReporter reporter("GL Layers"); + + // Do not allow double initialization + MOZ_ASSERT(mGLContext == nullptr || !mOwnsGLContext, + "Don't reinitialize CompositorOGL"); + + if (!mGLContext) { + MOZ_ASSERT(mOwnsGLContext); + mGLContext = CreateContext(); + } + +#ifdef MOZ_WIDGET_ANDROID + if (!mGLContext) { + *out_failureReason = "FEATURE_FAILURE_OPENGL_NO_ANDROID_CONTEXT"; + MOZ_CRASH("We need a context on Android"); + } +#endif + + if (!mGLContext) { + *out_failureReason = "FEATURE_FAILURE_OPENGL_CREATE_CONTEXT"; + return false; + } + + if (!mProgramsHolder) { + mProgramsHolder = new ShaderProgramOGLsHolder(mGLContext); + } + + MakeCurrent(); + + mHasBGRA = mGLContext->IsExtensionSupported( + gl::GLContext::EXT_texture_format_BGRA8888) || + mGLContext->IsExtensionSupported(gl::GLContext::EXT_bgra); + + mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA, + LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA); + mGLContext->fEnable(LOCAL_GL_BLEND); + + // initialise a common shader to check that we can actually compile a shader + RefPtr<DummyTextureSourceOGL> source = new DummyTextureSourceOGL; + RefPtr<EffectRGB> effect = + new EffectRGB(source, /* aPremultiplied */ true, SamplingFilter::GOOD); + ShaderConfigOGL config = GetShaderConfigFor(effect); + if (!GetShaderProgramFor(config)) { + *out_failureReason = "FEATURE_FAILURE_OPENGL_COMPILE_SHADER"; + return false; + } + + if (mGLContext->WorkAroundDriverBugs()) { + /** + * We'll test the ability here to bind NPOT textures to a framebuffer, if + * this fails we'll try ARB_texture_rectangle. + */ + + GLenum textureTargets[] = {LOCAL_GL_TEXTURE_2D, LOCAL_GL_NONE}; + + if (!mGLContext->IsGLES()) { + // No TEXTURE_RECTANGLE_ARB available on ES2 + textureTargets[1] = LOCAL_GL_TEXTURE_RECTANGLE_ARB; + } + + mFBOTextureTarget = LOCAL_GL_NONE; + + GLuint testFBO = 0; + mGLContext->fGenFramebuffers(1, &testFBO); + GLuint testTexture = 0; + + for (uint32_t i = 0; i < ArrayLength(textureTargets); i++) { + GLenum target = textureTargets[i]; + if (!target) continue; + + mGLContext->fGenTextures(1, &testTexture); + mGLContext->fBindTexture(target, testTexture); + mGLContext->fTexParameteri(target, LOCAL_GL_TEXTURE_MIN_FILTER, + LOCAL_GL_NEAREST); + mGLContext->fTexParameteri(target, LOCAL_GL_TEXTURE_MAG_FILTER, + LOCAL_GL_NEAREST); + mGLContext->fTexImage2D( + target, 0, LOCAL_GL_RGBA, 5, 3, /* sufficiently NPOT */ + 0, LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, nullptr); + + // unbind this texture, in preparation for binding it to the FBO + mGLContext->fBindTexture(target, 0); + + mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, testFBO); + mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, + LOCAL_GL_COLOR_ATTACHMENT0, target, + testTexture, 0); + + if (mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER) == + LOCAL_GL_FRAMEBUFFER_COMPLETE) { + mFBOTextureTarget = target; + mGLContext->fDeleteTextures(1, &testTexture); + break; + } + + mGLContext->fDeleteTextures(1, &testTexture); + } + + if (testFBO) { + mGLContext->fDeleteFramebuffers(1, &testFBO); + } + + if (mFBOTextureTarget == LOCAL_GL_NONE) { + /* Unable to find a texture target that works with FBOs and NPOT textures + */ + *out_failureReason = "FEATURE_FAILURE_OPENGL_NO_TEXTURE_TARGET"; + return false; + } + } else { + // not trying to work around driver bugs, so TEXTURE_2D should just work + mFBOTextureTarget = LOCAL_GL_TEXTURE_2D; + } + + // back to default framebuffer, to avoid confusion + mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0); + + if (mFBOTextureTarget == LOCAL_GL_TEXTURE_RECTANGLE_ARB) { + /* If we're using TEXTURE_RECTANGLE, then we must have the ARB + * extension -- the EXT variant does not provide support for + * texture rectangle access inside GLSL (sampler2DRect, + * texture2DRect). + */ + if (!mGLContext->IsExtensionSupported( + gl::GLContext::ARB_texture_rectangle)) { + *out_failureReason = "FEATURE_FAILURE_OPENGL_ARB_EXT"; + return false; + } + } + + // Create a VBO for triangle vertices. + mGLContext->fGenBuffers(1, &mTriangleVBO); + + /* Create a simple quad VBO */ + mGLContext->fGenBuffers(1, &mQuadVBO); + + // 4 quads, with the number of the quad (vertexID) encoded in w. + GLfloat vertices[] = { + 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, + 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, + + 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, + 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, + + 0.0f, 0.0f, 0.0f, 2.0f, 1.0f, 0.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.0f, 2.0f, + 1.0f, 0.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.0f, 2.0f, 1.0f, 1.0f, 0.0f, 2.0f, + + 0.0f, 0.0f, 0.0f, 3.0f, 1.0f, 0.0f, 0.0f, 3.0f, 0.0f, 1.0f, 0.0f, 3.0f, + 1.0f, 0.0f, 0.0f, 3.0f, 0.0f, 1.0f, 0.0f, 3.0f, 1.0f, 1.0f, 0.0f, 3.0f, + }; + HeapCopyOfStackArray<GLfloat> verticesOnHeap(vertices); + + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mQuadVBO); + mGLContext->fBufferData(LOCAL_GL_ARRAY_BUFFER, verticesOnHeap.ByteLength(), + verticesOnHeap.Data(), LOCAL_GL_STATIC_DRAW); + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0); + + nsCOMPtr<nsIConsoleService> console( + do_GetService(NS_CONSOLESERVICE_CONTRACTID)); + + if (console) { + nsString msg; + msg += nsLiteralString( + u"OpenGL compositor Initialized Succesfully.\nVersion: "); + msg += NS_ConvertUTF8toUTF16(nsDependentCString( + (const char*)mGLContext->fGetString(LOCAL_GL_VERSION))); + msg += u"\nVendor: "_ns; + msg += NS_ConvertUTF8toUTF16(nsDependentCString( + (const char*)mGLContext->fGetString(LOCAL_GL_VENDOR))); + msg += u"\nRenderer: "_ns; + msg += NS_ConvertUTF8toUTF16(nsDependentCString( + (const char*)mGLContext->fGetString(LOCAL_GL_RENDERER))); + msg += u"\nFBO Texture Target: "_ns; + if (mFBOTextureTarget == LOCAL_GL_TEXTURE_2D) + msg += u"TEXTURE_2D"_ns; + else + msg += u"TEXTURE_RECTANGLE"_ns; + console->LogStringMessage(msg.get()); + } + + reporter.SetSuccessful(); + + return true; +} + +/* + * Returns a size that is equal to, or larger than and closest to, + * aSize where both width and height are powers of two. + * If the OpenGL setup is capable of using non-POT textures, + * then it will just return aSize. + */ +static IntSize CalculatePOTSize(const IntSize& aSize, GLContext* gl) { + if (CanUploadNonPowerOfTwo(gl)) return aSize; + + return IntSize(RoundUpPow2(aSize.width), RoundUpPow2(aSize.height)); +} + +gfx::Rect CompositorOGL::GetTextureCoordinates(gfx::Rect textureRect, + TextureSource* aTexture) { + // If the OpenGL setup does not support non-power-of-two textures then the + // texture's width and height will have been increased to the next + // power-of-two (unless already a power of two). In that case we must scale + // the texture coordinates to account for that. + if (!CanUploadNonPowerOfTwo(mGLContext)) { + const IntSize& textureSize = aTexture->GetSize(); + const IntSize potSize = CalculatePOTSize(textureSize, mGLContext); + if (potSize != textureSize) { + const float xScale = (float)textureSize.width / (float)potSize.width; + const float yScale = (float)textureSize.height / (float)potSize.height; + textureRect.Scale(xScale, yScale); + } + } + + return textureRect; +} + +void CompositorOGL::PrepareViewport(CompositingRenderTargetOGL* aRenderTarget) { + MOZ_ASSERT(aRenderTarget); + // Logical surface size. + const gfx::IntSize& size = aRenderTarget->GetSize(); + // Physical surface size. + const gfx::IntSize& phySize = aRenderTarget->GetPhysicalSize(); + + // Set the viewport correctly. + mGLContext->fViewport(mSurfaceOrigin.x, mSurfaceOrigin.y, phySize.width, + phySize.height); + + mViewportSize = size; + + if (!aRenderTarget->HasComplexProjection()) { + // We flip the view matrix around so that everything is right-side up; we're + // drawing directly into the window's back buffer, so this keeps things + // looking correct. + // XXX: We keep track of whether the window size changed, so we could skip + // this update if it hadn't changed since the last call. + + // Matrix to transform (0, 0, aWidth, aHeight) to viewport space (-1.0, 1.0, + // 2, 2) and flip the contents. + Matrix viewMatrix; + viewMatrix.PreTranslate(-1.0, 1.0); + viewMatrix.PreScale(2.0f / float(size.width), 2.0f / float(size.height)); + viewMatrix.PreScale(1.0f, -1.0f); + + MOZ_ASSERT(mCurrentRenderTarget, "No destination"); + + Matrix4x4 matrix3d = Matrix4x4::From2D(viewMatrix); + matrix3d._33 = 0.0f; + mProjMatrix = matrix3d; + mGLContext->fDepthRange(0.0f, 1.0f); + } else { + bool depthEnable; + float zNear, zFar; + aRenderTarget->GetProjection(mProjMatrix, depthEnable, zNear, zFar); + mGLContext->fDepthRange(zNear, zFar); + } +} + +already_AddRefed<CompositingRenderTarget> CompositorOGL::CreateRenderTarget( + const IntRect& aRect, SurfaceInitMode aInit) { + MOZ_ASSERT(!aRect.IsZeroArea(), + "Trying to create a render target of invalid size"); + + if (aRect.IsZeroArea()) { + return nullptr; + } + + if (!gl()) { + // CompositingRenderTargetOGL does not work without a gl context. + return nullptr; + } + + GLuint tex = 0; + GLuint fbo = 0; + IntRect rect = aRect; + IntSize fboSize; + CreateFBOWithTexture(rect, false, 0, &fbo, &tex, &fboSize); + return CompositingRenderTargetOGL::CreateForNewFBOAndTakeOwnership( + this, tex, fbo, aRect, aRect.TopLeft(), aRect.Size(), mFBOTextureTarget, + aInit); +} + +void CompositorOGL::SetRenderTarget(CompositingRenderTarget* aSurface) { + MOZ_ASSERT(aSurface); + CompositingRenderTargetOGL* surface = + static_cast<CompositingRenderTargetOGL*>(aSurface); + if (mCurrentRenderTarget != surface) { + mCurrentRenderTarget = surface; + surface->BindRenderTarget(); + } + + PrepareViewport(mCurrentRenderTarget); +} + +already_AddRefed<CompositingRenderTarget> +CompositorOGL::GetCurrentRenderTarget() const { + return do_AddRef(mCurrentRenderTarget); +} + +already_AddRefed<CompositingRenderTarget> CompositorOGL::GetWindowRenderTarget() + const { + return do_AddRef(mWindowRenderTarget); +} + +already_AddRefed<AsyncReadbackBuffer> CompositorOGL::CreateAsyncReadbackBuffer( + const IntSize& aSize) { + return MakeAndAddRef<AsyncReadbackBufferOGL>(mGLContext, aSize); +} + +bool CompositorOGL::ReadbackRenderTarget(CompositingRenderTarget* aSource, + AsyncReadbackBuffer* aDest) { + IntSize size = aSource->GetSize(); + MOZ_RELEASE_ASSERT(aDest->GetSize() == size); + + RefPtr<CompositingRenderTarget> previousTarget = GetCurrentRenderTarget(); + if (previousTarget != aSource) { + SetRenderTarget(aSource); + } + + ScopedPackState scopedPackState(mGLContext); + static_cast<AsyncReadbackBufferOGL*>(aDest)->Bind(); + + mGLContext->fReadPixels(0, 0, size.width, size.height, LOCAL_GL_RGBA, + LOCAL_GL_UNSIGNED_BYTE, 0); + + if (previousTarget != aSource) { + SetRenderTarget(previousTarget); + } + return true; +} + +bool CompositorOGL::BlitRenderTarget(CompositingRenderTarget* aSource, + const gfx::IntSize& aSourceSize, + const gfx::IntSize& aDestSize) { + if (!mGLContext->IsSupported(GLFeature::framebuffer_blit)) { + return false; + } + CompositingRenderTargetOGL* source = + static_cast<CompositingRenderTargetOGL*>(aSource); + GLuint srcFBO = source->GetFBO(); + GLuint destFBO = mCurrentRenderTarget->GetFBO(); + mGLContext->BlitHelper()->BlitFramebufferToFramebuffer( + srcFBO, destFBO, IntRect(IntPoint(), aSourceSize), + IntRect(IntPoint(), aDestSize), LOCAL_GL_LINEAR); + return true; +} + +static GLenum GetFrameBufferInternalFormat( + GLContext* gl, GLuint aFrameBuffer, + mozilla::widget::CompositorWidget* aWidget) { + if (aFrameBuffer == 0) { // default framebuffer + return aWidget->GetGLFrameBufferFormat(); + } + return LOCAL_GL_RGBA; +} + +Maybe<IntRect> CompositorOGL::BeginFrameForWindow( + const nsIntRegion& aInvalidRegion, const Maybe<IntRect>& aClipRect, + const IntRect& aRenderBounds, const nsIntRegion& aOpaqueRegion) { + MOZ_RELEASE_ASSERT(!mTarget, "mTarget not cleared properly"); + return BeginFrame(aInvalidRegion, aClipRect, aRenderBounds, aOpaqueRegion); +} + +Maybe<IntRect> CompositorOGL::BeginFrame(const nsIntRegion& aInvalidRegion, + const Maybe<IntRect>& aClipRect, + const IntRect& aRenderBounds, + const nsIntRegion& aOpaqueRegion) { + AUTO_PROFILER_LABEL("CompositorOGL::BeginFrame", GRAPHICS); + + MOZ_ASSERT(!mFrameInProgress, + "frame still in progress (should have called EndFrame"); + + IntRect rect; + if (mUseExternalSurfaceSize) { + rect = IntRect(IntPoint(), mSurfaceSize); + } else { + rect = aRenderBounds; + } + + // We can't draw anything to something with no area + // so just return + if (rect.IsZeroArea()) { + return Nothing(); + } + + // If the widget size changed, we have to force a MakeCurrent + // to make sure that GL sees the updated widget size. + if (mWidgetSize.ToUnknownSize() != rect.Size()) { + MakeCurrent(ForceMakeCurrent); + + mWidgetSize = LayoutDeviceIntSize::FromUnknownSize(rect.Size()); +#ifdef MOZ_WIDGET_GTK + if (mWidget && mWidget->AsGTK()) { + if (!mWidget->AsGTK()->SetEGLNativeWindowSize(mWidgetSize)) { + // We don't have correct window size to paint into. + return Nothing(); + } + } +#endif + } else { + MakeCurrent(); + } + +#ifdef MOZ_WIDGET_ANDROID + java::GeckoSurfaceTexture::DestroyUnused((int64_t)mGLContext.get()); + mGLContext->MakeCurrent(); // DestroyUnused can change the current context! +#endif + + // Default blend function implements "OVER" + mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA, + LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA); + mGLContext->fEnable(LOCAL_GL_BLEND); + + RefPtr<CompositingRenderTarget> rt; + if (mCanRenderToDefaultFramebuffer) { + rt = CompositingRenderTargetOGL::CreateForWindow(this, rect.Size()); + } else if (mTarget) { + rt = CreateRenderTarget(rect, INIT_MODE_CLEAR); + } else { + MOZ_CRASH("Unexpected call"); + } + + if (!rt) { + return Nothing(); + } + + // We're about to actually draw a frame. + mFrameInProgress = true; + + SetRenderTarget(rt); + mWindowRenderTarget = mCurrentRenderTarget; + + for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) { + const IntRect& r = iter.Get(); + mCurrentFrameInvalidRegion.OrWith( + IntRect(r.X(), FlipY(r.YMost()), r.Width(), r.Height())); + } + // Check to see if there is any transparent dirty region that would require + // clearing. If not, just invalidate the framebuffer if supported. + // TODO: Currently we initialize the clear region to the widget bounds as + // SwapBuffers will update the entire framebuffer. On platforms that support + // damage regions, we could initialize this to mCurrentFrameInvalidRegion. + IntRegion regionToClear(rect); + regionToClear.SubOut(aOpaqueRegion); + GLbitfield clearBits = LOCAL_GL_DEPTH_BUFFER_BIT; + if (regionToClear.IsEmpty() && + mGLContext->IsSupported(GLFeature::invalidate_framebuffer)) { + GLenum attachments[] = {LOCAL_GL_COLOR}; + mGLContext->fInvalidateFramebuffer( + LOCAL_GL_FRAMEBUFFER, MOZ_ARRAY_LENGTH(attachments), attachments); + } else { + clearBits |= LOCAL_GL_COLOR_BUFFER_BIT; + } + +#if defined(MOZ_WIDGET_ANDROID) + if ((mSurfaceOrigin.x > 0) || (mSurfaceOrigin.y > 0)) { + mGLContext->fClearColor( + StaticPrefs::gfx_compositor_override_clear_color_r(), + StaticPrefs::gfx_compositor_override_clear_color_g(), + StaticPrefs::gfx_compositor_override_clear_color_b(), + StaticPrefs::gfx_compositor_override_clear_color_a()); + } else { + mGLContext->fClearColor(mClearColor.r, mClearColor.g, mClearColor.b, + mClearColor.a); + } +#else + mGLContext->fClearColor(mClearColor.r, mClearColor.g, mClearColor.b, + mClearColor.a); +#endif // defined(MOZ_WIDGET_ANDROID) + mGLContext->fClear(clearBits); + + return Some(rect); +} + +void CompositorOGL::CreateFBOWithTexture(const gfx::IntRect& aRect, + bool aCopyFromSource, + GLuint aSourceFrameBuffer, + GLuint* aFBO, GLuint* aTexture, + gfx::IntSize* aAllocSize) { + *aTexture = + CreateTexture(aRect, aCopyFromSource, aSourceFrameBuffer, aAllocSize); + mGLContext->fGenFramebuffers(1, aFBO); +} + +// Should be called after calls to fReadPixels or fCopyTexImage2D, and other +// GL read calls. +static void WorkAroundAppleIntelHD3000GraphicsGLDriverBug(GLContext* aGL) { +#ifdef XP_MACOSX + if (aGL->WorkAroundDriverBugs() && + aGL->Renderer() == GLRenderer::IntelHD3000) { + // Work around a bug in the Apple Intel HD Graphics 3000 driver (bug + // 1586627, filed with Apple as FB7379358). This bug has been found present + // on 10.9.3 and on 10.13.6, so it likely affects all shipped versions of + // this driver. (macOS 10.14 does not support this GPU.) + // The bug manifests as follows: Reading from a framebuffer puts that + // framebuffer into a state such that deleting that framebuffer can break + // other framebuffers in certain cases. More specifically, if you have two + // framebuffers A and B, the following sequence of events breaks subsequent + // drawing to B: + // 1. A becomes "most recently read-from framebuffer". + // 2. B is drawn to. + // 3. A is deleted, and other GL state (such as GL_SCISSOR enabled state) + // is touched. + // 4. B is drawn to again. + // Now all draws to framebuffer B, including the draw from step 4, will + // render at the wrong position and upside down. + // + // When AfterGLReadCall() is called, the currently bound framebuffer is the + // framebuffer that has been read from most recently. So in the presence of + // this bug, deleting this framebuffer has now become dangerous. We work + // around the bug by creating a new short-lived framebuffer, making that new + // framebuffer the most recently read-from framebuffer (using + // glCopyTexImage2D), and then deleting it under controlled circumstances. + // This deletion is not affected by the bug because our deletion call is not + // interleaved with draw calls to another framebuffer and a touching of the + // GL scissor enabled state. + + ScopedTexture texForReading(aGL); + { + // Initialize a 1x1 texture. + ScopedBindTexture autoBindTexForReading(aGL, texForReading); + aGL->fTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA, 1, 1, 0, + LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, nullptr); + aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, + LOCAL_GL_LINEAR); + aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, + LOCAL_GL_LINEAR); + } + // Make a framebuffer around the texture. + ScopedFramebufferForTexture autoFBForReading(aGL, texForReading); + if (autoFBForReading.IsComplete()) { + // "Read" from the framebuffer, by initializing a new texture using + // glCopyTexImage2D. This flips the bad bit on autoFBForReading.FB(). + ScopedBindFramebuffer autoFB(aGL, autoFBForReading.FB()); + ScopedTexture texReadingDest(aGL); + ScopedBindTexture autoBindTexReadingDest(aGL, texReadingDest); + aGL->fCopyTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA, 0, 0, 1, 1, + 0); + } + // When autoFBForReading goes out of scope, the "poisoned" framebuffer is + // deleted, and the bad state seems to go away along with it. + } +#endif +} + +GLuint CompositorOGL::CreateTexture(const IntRect& aRect, bool aCopyFromSource, + GLuint aSourceFrameBuffer, + IntSize* aAllocSize) { + // we're about to create a framebuffer backed by textures to use as an + // intermediate surface. What to do if its size (as given by aRect) would + // exceed the maximum texture size supported by the GL? The present code + // chooses the compromise of just clamping the framebuffer's size to the max + // supported size. This gives us a lower resolution rendering of the + // intermediate surface (children layers). See bug 827170 for a discussion. + IntRect clampedRect = aRect; + int32_t maxTexSize = GetMaxTextureSize(); + clampedRect.SetWidth(std::min(clampedRect.Width(), maxTexSize)); + clampedRect.SetHeight(std::min(clampedRect.Height(), maxTexSize)); + + auto clampedRectWidth = clampedRect.Width(); + auto clampedRectHeight = clampedRect.Height(); + + GLuint tex; + + mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0); + mGLContext->fGenTextures(1, &tex); + mGLContext->fBindTexture(mFBOTextureTarget, tex); + + if (aCopyFromSource) { + GLuint curFBO = mCurrentRenderTarget->GetFBO(); + if (curFBO != aSourceFrameBuffer) { + mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, aSourceFrameBuffer); + } + + // We're going to create an RGBA temporary fbo. But to + // CopyTexImage() from the current framebuffer, the framebuffer's + // format has to be compatible with the new texture's. So we + // check the format of the framebuffer here and take a slow path + // if it's incompatible. + GLenum format = + GetFrameBufferInternalFormat(gl(), aSourceFrameBuffer, mWidget); + + bool isFormatCompatibleWithRGBA = + gl()->IsGLES() ? (format == LOCAL_GL_RGBA) : true; + + if (isFormatCompatibleWithRGBA) { + mGLContext->fCopyTexImage2D(mFBOTextureTarget, 0, LOCAL_GL_RGBA, + clampedRect.X(), FlipY(clampedRect.YMost()), + clampedRectWidth, clampedRectHeight, 0); + WorkAroundAppleIntelHD3000GraphicsGLDriverBug(mGLContext); + } else { + // Curses, incompatible formats. Take a slow path. + + // RGBA + size_t bufferSize = clampedRectWidth * clampedRectHeight * 4; + auto buf = MakeUnique<uint8_t[]>(bufferSize); + + mGLContext->fReadPixels(clampedRect.X(), clampedRect.Y(), + clampedRectWidth, clampedRectHeight, + LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, buf.get()); + WorkAroundAppleIntelHD3000GraphicsGLDriverBug(mGLContext); + mGLContext->fTexImage2D(mFBOTextureTarget, 0, LOCAL_GL_RGBA, + clampedRectWidth, clampedRectHeight, 0, + LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, buf.get()); + } + + GLenum error = mGLContext->fGetError(); + if (error != LOCAL_GL_NO_ERROR) { + nsAutoCString msg; + msg.AppendPrintf( + "Texture initialization failed! -- error 0x%x, Source %d, Source " + "format %d, RGBA Compat %d", + error, aSourceFrameBuffer, format, isFormatCompatibleWithRGBA); + NS_ERROR(msg.get()); + } + } else { + mGLContext->fTexImage2D(mFBOTextureTarget, 0, LOCAL_GL_RGBA, + clampedRectWidth, clampedRectHeight, 0, + LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, nullptr); + } + mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MIN_FILTER, + LOCAL_GL_LINEAR); + mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MAG_FILTER, + LOCAL_GL_LINEAR); + mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_S, + LOCAL_GL_CLAMP_TO_EDGE); + mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_T, + LOCAL_GL_CLAMP_TO_EDGE); + mGLContext->fBindTexture(mFBOTextureTarget, 0); + + if (aAllocSize) { + aAllocSize->width = clampedRectWidth; + aAllocSize->height = clampedRectHeight; + } + + return tex; +} + +ShaderConfigOGL CompositorOGL::GetShaderConfigFor(Effect* aEffect, + bool aDEAAEnabled) const { + ShaderConfigOGL config; + + switch (aEffect->mType) { + case EffectTypes::YCBCR: { + config.SetYCbCr(true); + EffectYCbCr* effectYCbCr = static_cast<EffectYCbCr*>(aEffect); + config.SetColorMultiplier( + RescalingFactorForColorDepth(effectYCbCr->mColorDepth)); + config.SetTextureTarget( + effectYCbCr->mTexture->AsSourceOGL()->GetTextureTarget()); + break; + } + case EffectTypes::NV12: + config.SetNV12(true); + if (gl()->IsExtensionSupported(gl::GLContext::ARB_texture_rectangle)) { + config.SetTextureTarget(LOCAL_GL_TEXTURE_RECTANGLE_ARB); + } else { + config.SetTextureTarget(LOCAL_GL_TEXTURE_2D); + } + break; + default: { + MOZ_ASSERT(aEffect->mType == EffectTypes::RGB); + TexturedEffect* texturedEffect = static_cast<TexturedEffect*>(aEffect); + TextureSourceOGL* source = texturedEffect->mTexture->AsSourceOGL(); + MOZ_ASSERT_IF( + source->GetTextureTarget() == LOCAL_GL_TEXTURE_EXTERNAL, + source->GetFormat() == gfx::SurfaceFormat::R8G8B8A8 || + source->GetFormat() == gfx::SurfaceFormat::R8G8B8X8 || + source->GetFormat() == gfx::SurfaceFormat::B8G8R8A8 || + source->GetFormat() == gfx::SurfaceFormat::B8G8R8X8 || + source->GetFormat() == gfx::SurfaceFormat::R5G6B5_UINT16); + MOZ_ASSERT_IF( + source->GetTextureTarget() == LOCAL_GL_TEXTURE_RECTANGLE_ARB, + source->GetFormat() == gfx::SurfaceFormat::R8G8B8A8 || + source->GetFormat() == gfx::SurfaceFormat::R8G8B8X8 || + source->GetFormat() == gfx::SurfaceFormat::R5G6B5_UINT16 || + source->GetFormat() == gfx::SurfaceFormat::YUV422); + config = ShaderConfigFromTargetAndFormat(source->GetTextureTarget(), + source->GetFormat()); + if (!texturedEffect->mPremultiplied) { + config.SetNoPremultipliedAlpha(); + } + break; + } + } + config.SetDEAA(aDEAAEnabled); + return config; +} + +ShaderProgramOGL* CompositorOGL::GetShaderProgramFor( + const ShaderConfigOGL& aConfig) { + ShaderProgramOGL* shader = mProgramsHolder->GetShaderProgramFor(aConfig); + return shader; +} + +void CompositorOGL::ResetProgram() { mProgramsHolder->ResetCurrentProgram(); } + +static bool SetBlendMode(GLContext* aGL, gfx::CompositionOp aBlendMode, + bool aIsPremultiplied = true) { + if (BlendOpIsMixBlendMode(aBlendMode)) { + // Mix-blend modes require an extra step (or more) that cannot be expressed + // in the fixed-function blending capabilities of opengl. We handle them + // separately in shaders, and the shaders assume we will use our default + // blend function for compositing (premultiplied OP_OVER). + return false; + } + if (aBlendMode == gfx::CompositionOp::OP_OVER && aIsPremultiplied) { + return false; + } + + GLenum srcBlend; + GLenum dstBlend; + GLenum srcAlphaBlend = LOCAL_GL_ONE; + GLenum dstAlphaBlend = LOCAL_GL_ONE_MINUS_SRC_ALPHA; + + switch (aBlendMode) { + case gfx::CompositionOp::OP_OVER: + MOZ_ASSERT(!aIsPremultiplied); + srcBlend = LOCAL_GL_SRC_ALPHA; + dstBlend = LOCAL_GL_ONE_MINUS_SRC_ALPHA; + break; + case gfx::CompositionOp::OP_SOURCE: + srcBlend = aIsPremultiplied ? LOCAL_GL_ONE : LOCAL_GL_SRC_ALPHA; + dstBlend = LOCAL_GL_ZERO; + srcAlphaBlend = LOCAL_GL_ONE; + dstAlphaBlend = LOCAL_GL_ZERO; + break; + default: + MOZ_ASSERT_UNREACHABLE("Unsupported blend mode!"); + return false; + } + + aGL->fBlendFuncSeparate(srcBlend, dstBlend, srcAlphaBlend, dstAlphaBlend); + return true; +} + +gfx::Point3D CompositorOGL::GetLineCoefficients(const gfx::Point& aPoint1, + const gfx::Point& aPoint2) { + // Return standard coefficients for a line between aPoint1 and aPoint2 + // for standard line equation: + // + // Ax + By + C = 0 + // + // A = (p1.y – p2.y) + // B = (p2.x – p1.x) + // C = (p1.x * p2.y) – (p2.x * p1.y) + + gfx::Point3D coeffecients; + coeffecients.x = aPoint1.y - aPoint2.y; + coeffecients.y = aPoint2.x - aPoint1.x; + coeffecients.z = + aPoint1.x.value * aPoint2.y.value - aPoint2.x.value * aPoint1.y.value; + + coeffecients *= 1.0f / sqrtf(coeffecients.x * coeffecients.x + + coeffecients.y * coeffecients.y); + + // Offset outwards by 0.5 pixel as the edge is considered to be 1 pixel + // wide and included within the interior of the polygon + coeffecients.z += 0.5f; + + return coeffecients; +} + +void CompositorOGL::DrawQuad(const Rect& aRect, const IntRect& aClipRect, + const EffectChain& aEffectChain, Float aOpacity, + const gfx::Matrix4x4& aTransform, + const gfx::Rect& aVisibleRect) { + AUTO_PROFILER_LABEL("CompositorOGL::DrawQuad", GRAPHICS); + + DrawGeometry(aRect, aRect, aClipRect, aEffectChain, aOpacity, aTransform, + aVisibleRect); +} + +template <typename Geometry> +void CompositorOGL::DrawGeometry(const Geometry& aGeometry, + const gfx::Rect& aRect, + const gfx::IntRect& aClipRect, + const EffectChain& aEffectChain, + gfx::Float aOpacity, + const gfx::Matrix4x4& aTransform, + const gfx::Rect& aVisibleRect) { + MOZ_ASSERT(mFrameInProgress, "frame not started"); + MOZ_ASSERT(mCurrentRenderTarget, "No destination"); + + MakeCurrent(); + + // Convert aClipRect into render target space, and intersect it with the + // render target's clip. + IntRect clipRect = aClipRect + mCurrentRenderTarget->GetClipSpaceOrigin(); + if (Maybe<IntRect> rtClip = mCurrentRenderTarget->GetClipRect()) { + clipRect = clipRect.Intersect(*rtClip); + } + + Rect destRect = aTransform.TransformAndClipBounds( + aRect, Rect(mCurrentRenderTarget->GetRect().Intersect(clipRect))); + if (destRect.IsEmpty()) { + return; + } + + // Move clipRect into device space. + IntPoint offset = mCurrentRenderTarget->GetOrigin(); + clipRect -= offset; + + if (!mTarget && mCurrentRenderTarget->IsWindow()) { + clipRect.MoveBy(mSurfaceOrigin.x, -mSurfaceOrigin.y); + } + + ScopedGLState scopedScissorTestState(mGLContext, LOCAL_GL_SCISSOR_TEST, true); + ScopedScissorRect autoScissorRect(mGLContext, clipRect.X(), + FlipY(clipRect.Y() + clipRect.Height()), + clipRect.Width(), clipRect.Height()); + + // Only apply DEAA to quads that have been transformed such that aliasing + // could be visible + bool bEnableAA = StaticPrefs::layers_deaa_enabled() && + !aTransform.Is2DIntegerTranslation(); + + ShaderConfigOGL config = + GetShaderConfigFor(aEffectChain.mPrimaryEffect, bEnableAA); + + config.SetOpacity(aOpacity != 1.f); + ApplyPrimitiveConfig(config, aGeometry); + + ShaderProgramOGL* program = mProgramsHolder->ActivateProgram(config); + if (!program) { + return; + } + program->SetProjectionMatrix(mProjMatrix); + program->SetLayerTransform(aTransform); + program->SetRenderOffset(offset.x, offset.y); + + if (aOpacity != 1.f) program->SetLayerOpacity(aOpacity); + + if (config.mFeatures & ENABLE_TEXTURE_RECT) { + TextureSourceOGL* source = nullptr; + TexturedEffect* texturedEffect = + static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get()); + source = texturedEffect->mTexture->AsSourceOGL(); + // This is used by IOSurface that use 0,0...w,h coordinate rather then + // 0,0..1,1. + program->SetTexCoordMultiplier(source->GetSize().width, + source->GetSize().height); + } + + // XXX kip - These calculations could be performed once per layer rather than + // for every tile. This might belong in Compositor.cpp once DEAA + // is implemented for DirectX. + if (bEnableAA) { + // Calculate the transformed vertices of aVisibleRect in screen space + // pixels, mirroring the calculations in the vertex shader + Matrix4x4 flatTransform = aTransform; + flatTransform.PostTranslate(-offset.x, -offset.y, 0.0f); + flatTransform *= mProjMatrix; + + Rect viewportClip = Rect(-1.0f, -1.0f, 2.0f, 2.0f); + size_t edgeCount = 0; + Point3D coefficients[4]; + + Point points[Matrix4x4::kTransformAndClipRectMaxVerts]; + size_t pointCount = + flatTransform.TransformAndClipRect(aVisibleRect, viewportClip, points); + for (size_t i = 0; i < pointCount; i++) { + points[i] = Point((points[i].x * 0.5f + 0.5f) * mViewportSize.width, + (points[i].y * 0.5f + 0.5f) * mViewportSize.height); + } + if (pointCount > 2) { + // Use shoelace formula on a triangle in the clipped quad to determine if + // winding order is reversed. Iterate through the triangles until one is + // found with a non-zero area. + float winding = 0.0f; + size_t wp = 0; + while (winding == 0.0f && wp < pointCount) { + int wp1 = (wp + 1) % pointCount; + int wp2 = (wp + 2) % pointCount; + winding = (points[wp1].x - points[wp].x).value * + (points[wp1].y + points[wp].y).value + + (points[wp2].x - points[wp1].x).value * + (points[wp2].y + points[wp1].y).value + + (points[wp].x - points[wp2].x).value * + (points[wp].y + points[wp2].y).value; + wp++; + } + bool frontFacing = winding >= 0.0f; + + // Calculate the line coefficients used by the DEAA shader to determine + // the sub-pixel coverage of the edge pixels + for (size_t i = 0; i < pointCount; i++) { + const Point& p1 = points[i]; + const Point& p2 = points[(i + 1) % pointCount]; + // Create a DEAA edge for any non-straight lines, to a maximum of 4 + if (p1.x != p2.x && p1.y != p2.y && edgeCount < 4) { + if (frontFacing) { + coefficients[edgeCount++] = GetLineCoefficients(p2, p1); + } else { + coefficients[edgeCount++] = GetLineCoefficients(p1, p2); + } + } + } + } + + // The coefficients that are not needed must not cull any fragments. + // We fill these unused coefficients with a clipping plane that has no + // effect. + for (size_t i = edgeCount; i < 4; i++) { + coefficients[i] = Point3D(0.0f, 1.0f, mViewportSize.height); + } + + // Set uniforms required by DEAA shader + Matrix4x4 transformInverted = aTransform; + transformInverted.Invert(); + program->SetLayerTransformInverse(transformInverted); + program->SetDEAAEdges(coefficients); + program->SetVisibleCenter(aVisibleRect.Center()); + program->SetViewportSize(mViewportSize); + } + + bool didSetBlendMode = false; + + switch (aEffectChain.mPrimaryEffect->mType) { + case EffectTypes::RGB: { + TexturedEffect* texturedEffect = + static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get()); + TextureSource* source = texturedEffect->mTexture; + + didSetBlendMode = SetBlendMode(gl(), gfx::CompositionOp::OP_OVER, + texturedEffect->mPremultiplied); + + gfx::SamplingFilter samplingFilter = texturedEffect->mSamplingFilter; + + source->AsSourceOGL()->BindTexture(LOCAL_GL_TEXTURE0, samplingFilter); + + program->SetTextureUnit(0); + + Matrix4x4 textureTransform = source->AsSourceOGL()->GetTextureTransform(); + program->SetTextureTransform(textureTransform); + + BindAndDrawGeometryWithTextureRect( + program, aGeometry, texturedEffect->mTextureCoords, source); + source->AsSourceOGL()->MaybeFenceTexture(); + } break; + case EffectTypes::YCBCR: { + EffectYCbCr* effectYCbCr = + static_cast<EffectYCbCr*>(aEffectChain.mPrimaryEffect.get()); + TextureSource* sourceYCbCr = effectYCbCr->mTexture; + const int Y = 0, Cb = 1, Cr = 2; + TextureSourceOGL* sourceY = sourceYCbCr->GetSubSource(Y)->AsSourceOGL(); + TextureSourceOGL* sourceCb = sourceYCbCr->GetSubSource(Cb)->AsSourceOGL(); + TextureSourceOGL* sourceCr = sourceYCbCr->GetSubSource(Cr)->AsSourceOGL(); + + if (!sourceY || !sourceCb || !sourceCr) { + NS_WARNING("Invalid layer texture."); + return; + } + + sourceY->BindTexture(LOCAL_GL_TEXTURE0, effectYCbCr->mSamplingFilter); + sourceCb->BindTexture(LOCAL_GL_TEXTURE1, effectYCbCr->mSamplingFilter); + sourceCr->BindTexture(LOCAL_GL_TEXTURE2, effectYCbCr->mSamplingFilter); + + if (config.mFeatures & ENABLE_TEXTURE_RECT) { + // This is used by IOSurface that use 0,0...w,h coordinate rather then + // 0,0..1,1. + program->SetCbCrTexCoordMultiplier(sourceCb->GetSize().width, + sourceCb->GetSize().height); + } + + program->SetYCbCrTextureUnits(Y, Cb, Cr); + program->SetTextureTransform(Matrix4x4()); + program->SetYUVColorSpace(effectYCbCr->mYUVColorSpace); + + BindAndDrawGeometryWithTextureRect(program, aGeometry, + effectYCbCr->mTextureCoords, + sourceYCbCr->GetSubSource(Y)); + sourceY->MaybeFenceTexture(); + sourceCb->MaybeFenceTexture(); + sourceCr->MaybeFenceTexture(); + } break; + case EffectTypes::NV12: { + EffectNV12* effectNV12 = + static_cast<EffectNV12*>(aEffectChain.mPrimaryEffect.get()); + TextureSource* sourceNV12 = effectNV12->mTexture; + const int Y = 0, CbCr = 1; + TextureSourceOGL* sourceY = sourceNV12->GetSubSource(Y)->AsSourceOGL(); + TextureSourceOGL* sourceCbCr = + sourceNV12->GetSubSource(CbCr)->AsSourceOGL(); + + if (!sourceY || !sourceCbCr) { + NS_WARNING("Invalid layer texture."); + return; + } + + sourceY->BindTexture(LOCAL_GL_TEXTURE0, effectNV12->mSamplingFilter); + sourceCbCr->BindTexture(LOCAL_GL_TEXTURE1, effectNV12->mSamplingFilter); + + if (config.mFeatures & ENABLE_TEXTURE_RECT) { + // This is used by IOSurface that use 0,0...w,h coordinate rather then + // 0,0..1,1. + program->SetCbCrTexCoordMultiplier(sourceCbCr->GetSize().width, + sourceCbCr->GetSize().height); + } + + program->SetNV12TextureUnits(Y, CbCr); + program->SetTextureTransform(Matrix4x4()); + program->SetYUVColorSpace(effectNV12->mYUVColorSpace); + + BindAndDrawGeometryWithTextureRect(program, aGeometry, + effectNV12->mTextureCoords, + sourceNV12->GetSubSource(Y)); + sourceY->MaybeFenceTexture(); + sourceCbCr->MaybeFenceTexture(); + } break; + default: + MOZ_ASSERT(false, "Unhandled effect type"); + break; + } + + if (didSetBlendMode) { + gl()->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA, + LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA); + } + + // in case rendering has used some other GL context + MakeCurrent(); +} + +void CompositorOGL::BindAndDrawGeometry(ShaderProgramOGL* aProgram, + const gfx::Rect& aRect) { + BindAndDrawQuad(aProgram, aRect); +} + +void CompositorOGL::BindAndDrawGeometry( + ShaderProgramOGL* aProgram, + const nsTArray<gfx::TexturedTriangle>& aTriangles) { + NS_ASSERTION(aProgram->HasInitialized(), + "Shader program not correctly initialized"); + + const nsTArray<TexturedVertex> vertices = + TexturedTrianglesToVertexArray(aTriangles); + + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mTriangleVBO); + mGLContext->fBufferData(LOCAL_GL_ARRAY_BUFFER, + vertices.Length() * sizeof(TexturedVertex), + vertices.Elements(), LOCAL_GL_STREAM_DRAW); + + const GLsizei stride = 4 * sizeof(GLfloat); + InitializeVAO(kCoordinateAttributeIndex, 2, stride, 0); + InitializeVAO(kTexCoordinateAttributeIndex, 2, stride, 2 * sizeof(GLfloat)); + + mGLContext->fDrawArrays(LOCAL_GL_TRIANGLES, 0, vertices.Length()); + + mGLContext->fDisableVertexAttribArray(kCoordinateAttributeIndex); + mGLContext->fDisableVertexAttribArray(kTexCoordinateAttributeIndex); + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0); +} + +// |aRect| is the rectangle we want to draw to. We will draw it with +// up to 4 draw commands if necessary to avoid wrapping. +// |aTexCoordRect| is the rectangle from the texture that we want to +// draw using the given program. +// |aTexture| is the texture we are drawing. Its actual size can be +// larger than the rectangle given by |texCoordRect|. +void CompositorOGL::BindAndDrawGeometryWithTextureRect( + ShaderProgramOGL* aProg, const Rect& aRect, const Rect& aTexCoordRect, + TextureSource* aTexture) { + Rect scaledTexCoordRect = GetTextureCoordinates(aTexCoordRect, aTexture); + Rect layerRects[4]; + Rect textureRects[4]; + size_t rects = DecomposeIntoNoRepeatRects(aRect, scaledTexCoordRect, + &layerRects, &textureRects); + + BindAndDrawQuads(aProg, rects, layerRects, textureRects); +} + +void CompositorOGL::BindAndDrawGeometryWithTextureRect( + ShaderProgramOGL* aProg, const nsTArray<gfx::TexturedTriangle>& aTriangles, + const gfx::Rect& aTexCoordRect, TextureSource* aTexture) { + BindAndDrawGeometry(aProg, aTriangles); +} + +void CompositorOGL::BindAndDrawQuads(ShaderProgramOGL* aProg, int aQuads, + const Rect* aLayerRects, + const Rect* aTextureRects) { + NS_ASSERTION(aProg->HasInitialized(), + "Shader program not correctly initialized"); + + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mQuadVBO); + InitializeVAO(kCoordinateAttributeIndex, 4, 0, 0); + + aProg->SetLayerRects(aLayerRects); + if (aProg->GetTextureCount() > 0) { + aProg->SetTextureRects(aTextureRects); + } + + // We are using GL_TRIANGLES here because the Mac Intel drivers fail to + // properly process uniform arrays with GL_TRIANGLE_STRIP. Go figure. + mGLContext->fDrawArrays(LOCAL_GL_TRIANGLES, 0, 6 * aQuads); + mGLContext->fDisableVertexAttribArray(kCoordinateAttributeIndex); + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0); +} + +void CompositorOGL::InitializeVAO(const GLuint aAttrib, const GLint aComponents, + const GLsizei aStride, const size_t aOffset) { + mGLContext->fVertexAttribPointer(aAttrib, aComponents, LOCAL_GL_FLOAT, + LOCAL_GL_FALSE, aStride, + reinterpret_cast<GLvoid*>(aOffset)); + mGLContext->fEnableVertexAttribArray(aAttrib); +} + +#ifdef MOZ_DUMP_PAINTING +template <typename T> +void WriteSnapshotToDumpFile_internal(T* aObj, DataSourceSurface* aSurf) { + if (gfxUtils::sDumpPaintFile != stderr) { + gfxUtils::DumpAsDataURI(aSurf, gfxUtils::sDumpPaintFile); + } else { + nsCString uri = gfxUtils::GetAsDataURI(aSurf); + nsPrintfCString string(R"(array["%s-%)" PRIu64 R"("]="%s";\n)", + aObj->Name(), uint64_t(aObj), uri.BeginReading()); + fprintf_stderr(gfxUtils::sDumpPaintFile, "%s", string.get()); + } +} + +void WriteSnapshotToDumpFile(Compositor* aCompositor, DrawTarget* aTarget) { + RefPtr<SourceSurface> surf = aTarget->Snapshot(); + RefPtr<DataSourceSurface> dSurf = surf->GetDataSurface(); + WriteSnapshotToDumpFile_internal(aCompositor, dSurf); +} +#endif + +void CompositorOGL::EndFrame() { + AUTO_PROFILER_LABEL("CompositorOGL::EndFrame", GRAPHICS); + +#ifdef MOZ_DUMP_PAINTING + if (gfxEnv::MOZ_DISABLE_FORCE_PRESENT()) { + LayoutDeviceIntSize size; + if (mUseExternalSurfaceSize) { + size = LayoutDeviceIntSize(mSurfaceSize.width, mSurfaceSize.height); + } else { + size = mWidget->GetClientSize(); + } + RefPtr<DrawTarget> target = + gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget( + IntSize(size.width, size.height), SurfaceFormat::B8G8R8A8); + if (target) { + CopyToTarget(target, nsIntPoint(), Matrix()); + WriteSnapshotToDumpFile(this, target); + } + } +#endif + + mFrameInProgress = false; + mShouldInvalidateWindow = false; + + if (mTarget) { + CopyToTarget(mTarget, mTargetBounds.TopLeft(), Matrix()); + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0); + mTarget = nullptr; + mWindowRenderTarget = nullptr; + mCurrentRenderTarget = nullptr; + Compositor::EndFrame(); + return; + } + + mWindowRenderTarget = nullptr; + mCurrentRenderTarget = nullptr; + + if (mTexturePool) { + mTexturePool->EndFrame(); + } + + InsertFrameDoneSync(); + + mGLContext->SetDamage(mCurrentFrameInvalidRegion); + mGLContext->SwapBuffers(); + mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0); + + // Unbind all textures + for (GLuint i = 0; i <= 4; i++) { + mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0 + i); + mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, 0); + if (!mGLContext->IsGLES()) { + mGLContext->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0); + } + } + + mCurrentFrameInvalidRegion.SetEmpty(); + + Compositor::EndFrame(); +} + +void CompositorOGL::InsertFrameDoneSync() { +#ifdef XP_MACOSX + // Only do this on macOS. + // On other platforms, SwapBuffers automatically applies back-pressure. + if (mThisFrameDoneSync) { + mGLContext->fDeleteSync(mThisFrameDoneSync); + } + mThisFrameDoneSync = + mGLContext->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0); +#elif defined(MOZ_WIDGET_ANDROID) + const auto& gle = gl::GLContextEGL::Cast(mGLContext); + const auto& egl = gle->mEgl; + + EGLSync sync = nullptr; + if (AndroidHardwareBufferApi::Get()) { + sync = egl->fCreateSync(LOCAL_EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr); + } + if (sync) { + int fenceFd = egl->fDupNativeFenceFDANDROID(sync); + if (fenceFd >= 0) { + mReleaseFenceFd = ipc::FileDescriptor(UniqueFileHandle(fenceFd)); + } + egl->fDestroySync(sync); + sync = nullptr; + } +#endif +} + +ipc::FileDescriptor CompositorOGL::GetReleaseFence() { return mReleaseFenceFd; } + +bool CompositorOGL::NeedToRecreateFullWindowRenderTarget() const { + if (!ShouldRecordFrames()) { + return false; + } + if (!mFullWindowRenderTarget) { + return true; + } + IntSize windowSize = mWidget->GetClientSize().ToUnknownSize(); + return mFullWindowRenderTarget->GetSize() != windowSize; +} + +void CompositorOGL::SetDestinationSurfaceSize(const IntSize& aSize) { + mSurfaceSize.width = aSize.width; + mSurfaceSize.height = aSize.height; +} + +void CompositorOGL::CopyToTarget(DrawTarget* aTarget, + const nsIntPoint& aTopLeft, + const gfx::Matrix& aTransform) { + MOZ_ASSERT(aTarget); + IntRect rect; + if (mUseExternalSurfaceSize) { + rect = IntRect(0, 0, mSurfaceSize.width, mSurfaceSize.height); + } else { + rect = IntRect(0, 0, mWidgetSize.width, mWidgetSize.height); + } + GLint width = rect.Width(); + GLint height = rect.Height(); + + if ((int64_t(width) * int64_t(height) * int64_t(4)) > INT32_MAX) { + NS_ERROR("Widget size too big - integer overflow!"); + return; + } + + RefPtr<DataSourceSurface> source = Factory::CreateDataSourceSurface( + rect.Size(), gfx::SurfaceFormat::B8G8R8A8); + if (NS_WARN_IF(!source)) { + return; + } + + ReadPixelsIntoDataSurface(mGLContext, source); + + // Map from GL space to Cairo space and reverse the world transform. + Matrix glToCairoTransform = aTransform; + glToCairoTransform.Invert(); + glToCairoTransform.PreScale(1.0, -1.0); + glToCairoTransform.PreTranslate(0.0, -height); + + glToCairoTransform.PostTranslate(-aTopLeft.x, -aTopLeft.y); + + Matrix oldMatrix = aTarget->GetTransform(); + aTarget->SetTransform(glToCairoTransform); + Rect floatRect = Rect(rect.X(), rect.Y(), width, height); + aTarget->DrawSurface(source, floatRect, floatRect, DrawSurfaceOptions(), + DrawOptions(1.0f, CompositionOp::OP_SOURCE)); + aTarget->SetTransform(oldMatrix); + aTarget->Flush(); +} + +void CompositorOGL::Pause() { +#ifdef MOZ_WIDGET_ANDROID + if (!gl() || gl()->IsDestroyed()) return; + // ReleaseSurface internally calls MakeCurrent + gl()->ReleaseSurface(); +#elif defined(MOZ_WIDGET_GTK) + // ReleaseSurface internally calls MakeCurrent + gl()->ReleaseSurface(); +#endif +} + +bool CompositorOGL::Resume() { +#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_UIKIT) || \ + defined(MOZ_WIDGET_GTK) + if (!gl() || gl()->IsDestroyed()) return false; + + // RenewSurface internally calls MakeCurrent. + return gl()->RenewSurface(GetWidget()); +#else + return true; +#endif +} + +already_AddRefed<DataTextureSource> CompositorOGL::CreateDataTextureSource( + TextureFlags aFlags) { + if (!gl()) { + return nullptr; + } + + return MakeAndAddRef<TextureImageTextureSourceOGL>(this, aFlags); +} + +int32_t CompositorOGL::GetMaxTextureSize() const { + MOZ_ASSERT(mGLContext); + GLint texSize = 0; + mGLContext->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE, &texSize); + MOZ_ASSERT(texSize != 0); + return texSize; +} + +void CompositorOGL::MakeCurrent(MakeCurrentFlags aFlags) { + if (mDestroyed) { + NS_WARNING("Call on destroyed layer manager"); + return; + } + mGLContext->MakeCurrent(aFlags & ForceMakeCurrent); +} + +GLuint CompositorOGL::GetTemporaryTexture(GLenum aTarget, GLenum aUnit) { + if (!mTexturePool) { + mTexturePool = new PerUnitTexturePoolOGL(gl()); + } + return mTexturePool->GetTexture(aTarget, aUnit); +} + +GLuint PerUnitTexturePoolOGL::GetTexture(GLenum aTarget, GLenum aTextureUnit) { + if (mTextureTarget == 0) { + mTextureTarget = aTarget; + } + MOZ_ASSERT(mTextureTarget == aTarget); + + size_t index = aTextureUnit - LOCAL_GL_TEXTURE0; + // lazily grow the array of temporary textures + if (mTextures.Length() <= index) { + size_t prevLength = mTextures.Length(); + mTextures.SetLength(index + 1); + for (unsigned int i = prevLength; i <= index; ++i) { + mTextures[i] = 0; + } + } + // lazily initialize the temporary textures + if (!mTextures[index]) { + if (!mGL->MakeCurrent()) { + return 0; + } + mGL->fGenTextures(1, &mTextures[index]); + mGL->fBindTexture(aTarget, mTextures[index]); + mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_S, + LOCAL_GL_CLAMP_TO_EDGE); + mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_T, + LOCAL_GL_CLAMP_TO_EDGE); + } + return mTextures[index]; +} + +void PerUnitTexturePoolOGL::DestroyTextures() { + if (mGL && mGL->MakeCurrent()) { + if (mTextures.Length() > 0) { + mGL->fDeleteTextures(mTextures.Length(), &mTextures[0]); + } + } + mTextures.SetLength(0); +} + +void CompositorOGL::RegisterTextureSource(TextureSource* aTextureSource) { +#ifdef MOZ_WIDGET_GTK + if (mDestroyed) { + return; + } + mRegisteredTextureSources.insert(aTextureSource); +#endif +} + +void CompositorOGL::UnregisterTextureSource(TextureSource* aTextureSource) { +#ifdef MOZ_WIDGET_GTK + if (mDestroyed) { + return; + } + mRegisteredTextureSources.erase(aTextureSource); +#endif +} + +} // namespace layers +} // namespace mozilla |