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340 lines
11 KiB
C++
340 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_COMPOSITOROGL_H
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#define MOZILLA_GFX_COMPOSITOROGL_H
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#include "mozilla/layers/Compositor.h"
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#include "GLContext.h"
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#include "LayerManagerOGLProgram.h"
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#include "mozilla/layers/Effects.h"
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#include "mozilla/TimeStamp.h"
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namespace mozilla {
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namespace layers {
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struct FPSState;
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class CompositingRenderTargetOGL;
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class GLManagerCompositor;
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class CompositorOGL : public Compositor
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{
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typedef mozilla::gl::GLContext GLContext;
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typedef mozilla::gl::ShaderProgramType ProgramType;
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friend class GLManagerCompositor;
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public:
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CompositorOGL(nsIWidget *aWidget, int aSurfaceWidth = -1, int aSurfaceHeight = -1,
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bool aUseExternalSurfaceSize = false);
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virtual ~CompositorOGL();
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virtual bool Initialize() MOZ_OVERRIDE;
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virtual void Destroy() MOZ_OVERRIDE;
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virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() MOZ_OVERRIDE
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{
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return TextureFactoryIdentifier(LAYERS_OPENGL,
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GetMaxTextureSize(),
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mFBOTextureTarget == LOCAL_GL_TEXTURE_2D,
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SupportsPartialTextureUpdate());
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}
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virtual TemporaryRef<CompositingRenderTarget>
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CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) MOZ_OVERRIDE;
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virtual TemporaryRef<CompositingRenderTarget>
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CreateRenderTargetFromSource(const gfx::IntRect &aRect,
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const CompositingRenderTarget *aSource) MOZ_OVERRIDE;
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virtual void SetRenderTarget(CompositingRenderTarget *aSurface) MOZ_OVERRIDE;
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virtual CompositingRenderTarget* GetCurrentRenderTarget() MOZ_OVERRIDE;
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virtual void DrawQuad(const gfx::Rect& aRect, const gfx::Rect& aClipRect,
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const EffectChain &aEffectChain,
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gfx::Float aOpacity, const gfx::Matrix4x4 &aTransform,
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const gfx::Point& aOffset) MOZ_OVERRIDE;
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virtual void EndFrame() MOZ_OVERRIDE;
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virtual void EndFrameForExternalComposition(const gfxMatrix& aTransform) MOZ_OVERRIDE;
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virtual void AbortFrame() MOZ_OVERRIDE;
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virtual bool SupportsPartialTextureUpdate() MOZ_OVERRIDE
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{
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return mGLContext->CanUploadSubTextures();
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}
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virtual bool CanUseCanvasLayerForSize(const gfxIntSize &aSize) MOZ_OVERRIDE
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{
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if (!mGLContext)
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return false;
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int32_t maxSize = GetMaxTextureSize();
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return aSize <= gfxIntSize(maxSize, maxSize);
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}
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virtual int32_t GetMaxTextureSize() const MOZ_OVERRIDE
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{
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MOZ_ASSERT(mGLContext);
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GLint texSize = 0;
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mGLContext->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE,
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&texSize);
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MOZ_ASSERT(texSize != 0);
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return texSize;
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}
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/**
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* Set the size of the EGL surface we're rendering to, if we're rendering to
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* an EGL surface.
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*/
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virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) MOZ_OVERRIDE;
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virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) MOZ_OVERRIDE {
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mRenderOffset = aOffset;
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}
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virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) MOZ_OVERRIDE {
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if (mDestroyed) {
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NS_WARNING("Call on destroyed layer manager");
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return;
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}
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mGLContext->MakeCurrent(aFlags & ForceMakeCurrent);
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}
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virtual void SetTargetContext(gfxContext* aTarget) MOZ_OVERRIDE
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{
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mTarget = aTarget;
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}
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virtual void PrepareViewport(const gfx::IntSize& aSize,
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const gfxMatrix& aWorldTransform) MOZ_OVERRIDE;
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#ifdef MOZ_DUMP_PAINTING
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virtual const char* Name() const MOZ_OVERRIDE { return "OGL"; }
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#endif // MOZ_DUMP_PAINTING
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virtual void NotifyLayersTransaction() MOZ_OVERRIDE;
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virtual void Pause() MOZ_OVERRIDE;
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virtual bool Resume() MOZ_OVERRIDE;
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virtual nsIWidget* GetWidget() const MOZ_OVERRIDE { return mWidget; }
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virtual const nsIntSize& GetWidgetSize() MOZ_OVERRIDE {
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return mWidgetSize;
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}
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GLContext* gl() const { return mGLContext; }
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gl::ShaderProgramType GetFBOLayerProgramType() const {
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return mFBOTextureTarget == LOCAL_GL_TEXTURE_RECTANGLE_ARB ?
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gl::RGBARectLayerProgramType : gl::RGBALayerProgramType;
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}
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/**
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* The compositor provides with temporary textures for use with direct
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* textruing like gralloc texture.
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* Doing so lets us use gralloc the way it has been designed to be used
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* (see https://wiki.mozilla.org/Platform/GFX/Gralloc)
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*/
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GLuint GetTemporaryTexture(GLenum aUnit);
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private:
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/**
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* Context target, nullptr when drawing directly to our swap chain.
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*/
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nsRefPtr<gfxContext> mTarget;
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/** Widget associated with this compositor */
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nsIWidget *mWidget;
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nsIntSize mWidgetSize;
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nsRefPtr<GLContext> mGLContext;
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/** The size of the surface we are rendering to */
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nsIntSize mSurfaceSize;
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ScreenPoint mRenderOffset;
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/** Helper-class used by Initialize **/
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class ReadDrawFPSPref MOZ_FINAL : public nsRunnable {
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public:
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NS_IMETHOD Run() MOZ_OVERRIDE;
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};
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already_AddRefed<mozilla::gl::GLContext> CreateContext();
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/** Shader Programs */
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struct ShaderProgramVariations {
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nsAutoTArray<nsAutoPtr<ShaderProgramOGL>, NumMaskTypes> mVariations;
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ShaderProgramVariations() {
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MOZ_COUNT_CTOR(ShaderProgramVariations);
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mVariations.SetLength(NumMaskTypes);
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}
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~ShaderProgramVariations() {
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MOZ_COUNT_DTOR(ShaderProgramVariations);
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}
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};
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nsTArray<ShaderProgramVariations> mPrograms;
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/** Texture target to use for FBOs */
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GLenum mFBOTextureTarget;
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/** Currently bound render target */
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RefPtr<CompositingRenderTargetOGL> mCurrentRenderTarget;
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#ifdef DEBUG
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CompositingRenderTargetOGL* mWindowRenderTarget;
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#endif
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/** VBO that has some basics in it for a textured quad,
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* including vertex coords and texcoords for both
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* flipped and unflipped textures */
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GLuint mQuadVBO;
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bool mHasBGRA;
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/**
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* When rendering to some EGL surfaces (e.g. on Android), we rely on being told
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* about size changes (via SetSurfaceSize) rather than pulling this information
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* from the widget.
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*/
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bool mUseExternalSurfaceSize;
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/**
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* Have we had DrawQuad calls since the last frame was rendered?
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*/
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bool mFrameInProgress;
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/* Start a new frame. If aClipRectIn is null and aClipRectOut is non-null,
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* sets *aClipRectOut to the screen dimensions.
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*/
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virtual void BeginFrame(const gfx::Rect *aClipRectIn,
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const gfxMatrix& aTransform,
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const gfx::Rect& aRenderBounds,
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gfx::Rect *aClipRectOut = nullptr,
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gfx::Rect *aRenderBoundsOut = nullptr) MOZ_OVERRIDE;
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gl::ShaderProgramType GetProgramTypeForEffect(Effect* aEffect) const;
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/**
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* Updates all layer programs with a new projection matrix.
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*/
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void SetLayerProgramProjectionMatrix(const gfx3DMatrix& aMatrix);
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/**
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* Helper method for Initialize, creates all valid variations of a program
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* and adds them to mPrograms
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*/
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void AddPrograms(gl::ShaderProgramType aType);
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ShaderProgramOGL* GetProgram(gl::ShaderProgramType aType,
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MaskType aMask = MaskNone) {
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MOZ_ASSERT(ProgramProfileOGL::ProgramExists(aType, aMask),
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"Invalid program type.");
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return mPrograms[aType].mVariations[aMask];
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}
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/**
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* Create a FBO backed by a texture.
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* Note that the texture target type will be
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* of the type returned by FBOTextureTarget; different
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* shaders are required to sample from the different
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* texture types.
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*/
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void CreateFBOWithTexture(const gfx::IntRect& aRect, SurfaceInitMode aInit,
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GLuint aSourceFrameBuffer,
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GLuint *aFBO, GLuint *aTexture);
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GLintptr QuadVBOVertexOffset() { return 0; }
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GLintptr QuadVBOTexCoordOffset() { return sizeof(float)*4*2; }
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GLintptr QuadVBOFlippedTexCoordOffset() { return sizeof(float)*8*2; }
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void BindQuadVBO() {
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mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mQuadVBO);
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}
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void QuadVBOVerticesAttrib(GLuint aAttribIndex) {
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mGLContext->fVertexAttribPointer(aAttribIndex, 2,
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LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
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(GLvoid*) QuadVBOVertexOffset());
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}
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void QuadVBOTexCoordsAttrib(GLuint aAttribIndex) {
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mGLContext->fVertexAttribPointer(aAttribIndex, 2,
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LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
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(GLvoid*) QuadVBOTexCoordOffset());
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}
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void QuadVBOFlippedTexCoordsAttrib(GLuint aAttribIndex) {
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mGLContext->fVertexAttribPointer(aAttribIndex, 2,
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LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
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(GLvoid*) QuadVBOFlippedTexCoordOffset());
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}
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void BindAndDrawQuad(GLuint aVertAttribIndex,
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GLuint aTexCoordAttribIndex,
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bool aFlipped = false)
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{
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BindQuadVBO();
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QuadVBOVerticesAttrib(aVertAttribIndex);
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if (aTexCoordAttribIndex != GLuint(-1)) {
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if (aFlipped)
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QuadVBOFlippedTexCoordsAttrib(aTexCoordAttribIndex);
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else
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QuadVBOTexCoordsAttrib(aTexCoordAttribIndex);
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mGLContext->fEnableVertexAttribArray(aTexCoordAttribIndex);
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}
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mGLContext->fEnableVertexAttribArray(aVertAttribIndex);
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mGLContext->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
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mGLContext->fDisableVertexAttribArray(aVertAttribIndex);
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if (aTexCoordAttribIndex != GLuint(-1)) {
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mGLContext->fDisableVertexAttribArray(aTexCoordAttribIndex);
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}
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}
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void BindAndDrawQuad(ShaderProgramOGL *aProg,
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bool aFlipped = false)
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{
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NS_ASSERTION(aProg->HasInitialized(), "Shader program not correctly initialized");
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BindAndDrawQuad(aProg->AttribLocation(ShaderProgramOGL::VertexCoordAttrib),
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aProg->AttribLocation(ShaderProgramOGL::TexCoordAttrib),
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aFlipped);
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}
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void BindAndDrawQuadWithTextureRect(ShaderProgramOGL *aProg,
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const gfx::Rect& aTexCoordRect,
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TextureSource *aTexture);
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void CleanupResources();
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/**
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* Copies the content of our backbuffer to the set transaction target.
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* Does not restore the target FBO, so only call from EndFrame.
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*/
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void CopyToTarget(gfxContext *aTarget, const gfxMatrix& aWorldMatrix);
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/**
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* Records the passed frame timestamp and returns the current estimated FPS.
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*/
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double AddFrameAndGetFps(const TimeStamp& timestamp);
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bool mDestroyed;
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nsAutoPtr<FPSState> mFPS;
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// Textures used for direct texturing of buffers like gralloc.
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// The index of the texture in this array must correspond to the texture unit.
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GLuint mTextures[3];
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static bool sDrawFPS;
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static bool sFrameCounter;
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};
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}
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}
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#endif /* MOZILLA_GFX_COMPOSITOROGL_H */
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