The Tor Browser: gfx/layers/opengl/CompositorOGL.h@129ffea94266 (annotated)

gfx/layers/opengl/CompositorOGL.h@129ffea94266 (annotated)

gfx/layers/opengl/CompositorOGL.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * 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/. */
 #ifndef MOZILLA_GFX_COMPOSITOROGL_H
 #define MOZILLA_GFX_COMPOSITOROGL_H
 #include "gfx2DGlue.h"
 #include "GLContextTypes.h"             // for GLContext, etc
 #include "GLDefs.h"                     // for GLuint, LOCAL_GL_TEXTURE_2D, etc
 #include "OGLShaderProgram.h"           // for ShaderProgramOGL, etc
 #include "Units.h"                      // for ScreenPoint
 #include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
 #include "mozilla/Attributes.h"         // for MOZ_OVERRIDE, MOZ_FINAL
 #include "mozilla/RefPtr.h"             // for TemporaryRef, RefPtr
 #include "mozilla/gfx/2D.h"             // for DrawTarget
 #include "mozilla/gfx/BaseSize.h"       // for BaseSize
 #include "mozilla/gfx/Point.h"          // for IntSize, Point
 #include "mozilla/gfx/Rect.h"           // for Rect, IntRect
 #include "mozilla/gfx/Types.h"          // for Float, SurfaceFormat, etc
 #include "mozilla/layers/Compositor.h"  // for SurfaceInitMode, Compositor, etc
 #include "mozilla/layers/CompositorTypes.h"  // for MaskType::NumMaskTypes, etc
 #include "mozilla/layers/LayersTypes.h"
 #include "nsAutoPtr.h"                  // for nsRefPtr, nsAutoPtr
 #include "nsCOMPtr.h"                   // for already_AddRefed
 #include "nsDebug.h"                    // for NS_ASSERTION, NS_WARNING
 #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
 #include "nsSize.h"                     // for nsIntSize
 #include "nsTArray.h"                   // for nsAutoTArray, nsTArray, etc
 #include "nsThreadUtils.h"              // for nsRunnable
 #include "nsXULAppAPI.h"                // for XRE_GetProcessType
 #include "nscore.h"                     // for NS_IMETHOD
 #include "VBOArena.h"                   // for gl::VBOArena
 #ifdef MOZ_WIDGET_GONK
 #include <ui/GraphicBuffer.h>
 #endif
 class gfx3DMatrix;
 class nsIWidget;
 namespace mozilla {
 class TimeStamp;
 namespace gfx {
 class Matrix4x4;
 }
 namespace layers {
 class CompositingRenderTarget;
 class CompositingRenderTargetOGL;
 class DataTextureSource;
 class GLManagerCompositor;
 class TextureSource;
 struct Effect;
 struct EffectChain;
 /**
  * Interface for pools of temporary gl textures for the compositor.
  * The textures are fully owned by the pool, so the latter is responsible
  * calling fDeleteTextures accordingly.
  * Users of GetTexture receive a texture that is only valid for the duration
  * of the current frame.
  * This is primarily intended for direct texturing APIs that need to attach
  * shared objects (such as an EGLImage) to a gl texture.
  */
 class CompositorTexturePoolOGL
 {
 protected:
   virtual ~CompositorTexturePoolOGL() {}
 public:
   NS_INLINE_DECL_REFCOUNTING(CompositorTexturePoolOGL)
   virtual void Clear() = 0;
   virtual GLuint GetTexture(GLenum aTarget, GLenum aEnum) = 0;
   virtual void EndFrame() = 0;
 };
 /**
  * Agressively reuses textures. One gl texture per texture unit in total.
  * So far this hasn't shown the best results on b2g.
  */
 class PerUnitTexturePoolOGL : public CompositorTexturePoolOGL
 {
 public:
   PerUnitTexturePoolOGL(gl::GLContext* aGL)
   : mTextureTarget(0) // zero is never a valid texture target
   , mGL(aGL)
   {}
   virtual ~PerUnitTexturePoolOGL()
   {
     DestroyTextures();
   }
   virtual void Clear() MOZ_OVERRIDE
   {
     DestroyTextures();
   }
   virtual GLuint GetTexture(GLenum aTarget, GLenum aUnit) MOZ_OVERRIDE;
   virtual void EndFrame() MOZ_OVERRIDE {}
 protected:
   void DestroyTextures();
   GLenum mTextureTarget;
   nsTArray<GLuint> mTextures;
   RefPtr<gl::GLContext> mGL;
 };
 /**
  * Reuse gl textures from a pool of textures that haven't yet been
  * used during the current frame.
  * All the textures that are not used at the end of a frame are
  * deleted.
  * This strategy seems to work well with gralloc textures because destroying
  * unused textures which are bound to gralloc buffers let drivers know that it
  * can unlock the gralloc buffers.
  */
 class PerFrameTexturePoolOGL : public CompositorTexturePoolOGL
 {
 public:
   PerFrameTexturePoolOGL(gl::GLContext* aGL)
   : mTextureTarget(0) // zero is never a valid texture target
   , mGL(aGL)
   {}
   virtual ~PerFrameTexturePoolOGL()
   {
     DestroyTextures();
   }
   virtual void Clear() MOZ_OVERRIDE
   {
     DestroyTextures();
   }
   virtual GLuint GetTexture(GLenum aTarget, GLenum aUnit) MOZ_OVERRIDE;
   virtual void EndFrame() MOZ_OVERRIDE;
 protected:
   void DestroyTextures();
   GLenum mTextureTarget;
   RefPtr<gl::GLContext> mGL;
   nsTArray<GLuint> mCreatedTextures;
   nsTArray<GLuint> mUnusedTextures;
 };
 class CompositorOGL : public Compositor
 {
   typedef mozilla::gl::GLContext GLContext;
   friend class GLManagerCompositor;
   std::map<ShaderConfigOGL, ShaderProgramOGL*> mPrograms;
 public:
   CompositorOGL(nsIWidget *aWidget, int aSurfaceWidth = -1, int aSurfaceHeight = -1,
                 bool aUseExternalSurfaceSize = false);
   virtual ~CompositorOGL();
   virtual TemporaryRef<DataTextureSource>
   CreateDataTextureSource(TextureFlags aFlags = 0) MOZ_OVERRIDE;
   virtual bool Initialize() MOZ_OVERRIDE;
   virtual void Destroy() MOZ_OVERRIDE;
   virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() MOZ_OVERRIDE
   {
     return TextureFactoryIdentifier(LayersBackend::LAYERS_OPENGL,
                                     XRE_GetProcessType(),
                                     GetMaxTextureSize(),
                                     mFBOTextureTarget == LOCAL_GL_TEXTURE_2D,
                                     SupportsPartialTextureUpdate());
   }
   virtual TemporaryRef<CompositingRenderTarget>
   CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) MOZ_OVERRIDE;
   virtual TemporaryRef<CompositingRenderTarget>
   CreateRenderTargetFromSource(const gfx::IntRect &aRect,
                                const CompositingRenderTarget *aSource,
                                const gfx::IntPoint &aSourcePoint) MOZ_OVERRIDE;
   virtual void SetRenderTarget(CompositingRenderTarget *aSurface) MOZ_OVERRIDE;
   virtual CompositingRenderTarget* GetCurrentRenderTarget() const MOZ_OVERRIDE;
   virtual void DrawQuad(const gfx::Rect& aRect,
                         const gfx::Rect& aClipRect,
                         const EffectChain &aEffectChain,
                         gfx::Float aOpacity,
                         const gfx::Matrix4x4 &aTransform) MOZ_OVERRIDE
   {
     DrawQuadInternal(aRect, aClipRect, aEffectChain,
                      aOpacity, aTransform, LOCAL_GL_TRIANGLE_STRIP);
   }
   virtual void DrawLines(const std::vector<gfx::Point>& aLines,
                          const gfx::Rect& aClipRect,
                          const gfx::Color& aColor,
                          gfx::Float aOpacity,
                          const gfx::Matrix4x4 &aTransform) MOZ_OVERRIDE;
   virtual void EndFrame() MOZ_OVERRIDE;
   virtual void SetFBAcquireFence(Layer* aLayer) MOZ_OVERRIDE;
   virtual void EndFrameForExternalComposition(const gfx::Matrix& aTransform) MOZ_OVERRIDE;
   virtual void AbortFrame() MOZ_OVERRIDE;
   virtual bool SupportsPartialTextureUpdate() MOZ_OVERRIDE;
   virtual bool CanUseCanvasLayerForSize(const gfx::IntSize &aSize) MOZ_OVERRIDE
   {
     if (!mGLContext)
       return false;
     int32_t maxSize = GetMaxTextureSize();
     return aSize <= gfx::IntSize(maxSize, maxSize);
   }
   virtual int32_t GetMaxTextureSize() const MOZ_OVERRIDE;
   /**
    * Set the size of the EGL surface we're rendering to, if we're rendering to
    * an EGL surface.
    */
   virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) MOZ_OVERRIDE;
   virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) MOZ_OVERRIDE {
     mRenderOffset = aOffset;
   }
   virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) MOZ_OVERRIDE;
   virtual void SetTargetContext(gfx::DrawTarget* aTarget) MOZ_OVERRIDE
   {
     mTarget = aTarget;
   }
   virtual void PrepareViewport(const gfx::IntSize& aSize,
                                const gfx::Matrix& aWorldTransform) MOZ_OVERRIDE;
 #ifdef MOZ_DUMP_PAINTING
   virtual const char* Name() const MOZ_OVERRIDE { return "OGL"; }
 #endif // MOZ_DUMP_PAINTING
   virtual LayersBackend GetBackendType() const MOZ_OVERRIDE {
     return LayersBackend::LAYERS_OPENGL;
   }
   virtual void Pause() MOZ_OVERRIDE;
   virtual bool Resume() MOZ_OVERRIDE;
   virtual nsIWidget* GetWidget() const MOZ_OVERRIDE { return mWidget; }
   GLContext* gl() const { return mGLContext; }
   gfx::SurfaceFormat GetFBOFormat() const {
     return gfx::SurfaceFormat::R8G8B8A8;
   }
   /**
    * The compositor provides with temporary textures for use with direct
    * textruing like gralloc texture.
    * Doing so lets us use gralloc the way it has been designed to be used
    * (see https://wiki.mozilla.org/Platform/GFX/Gralloc)
    */
   GLuint GetTemporaryTexture(GLenum aTarget, GLenum aUnit);
   const gfx::Matrix4x4& GetProjMatrix() const {
     return mProjMatrix;
   }
 private:
   virtual void DrawQuadInternal(const gfx::Rect& aRect,
                                 const gfx::Rect& aClipRect,
                                 const EffectChain &aEffectChain,
                                 gfx::Float aOpacity,
                                 const gfx::Matrix4x4 &aTransformi,
                                 GLuint aDrawMode);
   virtual gfx::IntSize GetWidgetSize() const MOZ_OVERRIDE
   {
     return gfx::ToIntSize(mWidgetSize);
   }
   /**
    * Context target, nullptr when drawing directly to our swap chain.
    */
   RefPtr<gfx::DrawTarget> mTarget;
   /** Widget associated with this compositor */
   nsIWidget *mWidget;
   nsIntSize mWidgetSize;
   nsRefPtr<GLContext> mGLContext;
   gfx::Matrix4x4 mProjMatrix;
   /** The size of the surface we are rendering to */
   nsIntSize mSurfaceSize;
   ScreenPoint mRenderOffset;
   already_AddRefed<mozilla::gl::GLContext> CreateContext();
   /** Texture target to use for FBOs */
   GLenum mFBOTextureTarget;
   /** Currently bound render target */
   RefPtr<CompositingRenderTargetOGL> mCurrentRenderTarget;
 #ifdef DEBUG
   CompositingRenderTargetOGL* mWindowRenderTarget;
 #endif
   /**
    * VBO that has some basics in it for a textured quad, including vertex
    * coords and texcoords.
    */
   GLuint mQuadVBO;
   /**
    * When we can't use mQuadVBO, we allocate VBOs from this arena instead.
    */
   gl::VBOArena mVBOs;
   bool mHasBGRA;
   /**
    * When rendering to some EGL surfaces (e.g. on Android), we rely on being told
    * about size changes (via SetSurfaceSize) rather than pulling this information
    * from the widget.
    */
   bool mUseExternalSurfaceSize;
   /**
    * Have we had DrawQuad calls since the last frame was rendered?
    */
   bool mFrameInProgress;
   /*
    * Clear aRect on current render target.
    */
   virtual void ClearRect(const gfx::Rect& aRect) MOZ_OVERRIDE;
   /* Start a new frame. If aClipRectIn is null and aClipRectOut is non-null,
    * sets *aClipRectOut to the screen dimensions.
    */
   virtual void BeginFrame(const nsIntRegion& aInvalidRegion,
                           const gfx::Rect *aClipRectIn,
                           const gfx::Matrix& aTransform,
                           const gfx::Rect& aRenderBounds,
                           gfx::Rect *aClipRectOut = nullptr,
                           gfx::Rect *aRenderBoundsOut = nullptr) MOZ_OVERRIDE;
   ShaderConfigOGL GetShaderConfigFor(Effect *aEffect, MaskType aMask = MaskNone) const;
   ShaderProgramOGL* GetShaderProgramFor(const ShaderConfigOGL &aConfig);
   /**
    * Create a FBO backed by a texture.
    * Note that the texture target type will be
    * of the type returned by FBOTextureTarget; different
    * shaders are required to sample from the different
    * texture types.
    */
   void CreateFBOWithTexture(const gfx::IntRect& aRect, bool aCopyFromSource,
                             GLuint aSourceFrameBuffer,
                             GLuint *aFBO, GLuint *aTexture);
   GLintptr QuadVBOVertexOffset() { return 0; }
   GLintptr QuadVBOTexCoordOffset() { return sizeof(float)*4*2; }
   void BindQuadVBO();
   void QuadVBOVerticesAttrib(GLuint aAttribIndex);
   void QuadVBOTexCoordsAttrib(GLuint aAttribIndex);
   void BindAndDrawQuad(GLuint aVertAttribIndex,
                        GLuint aTexCoordAttribIndex,
                        GLuint aDrawMode = LOCAL_GL_TRIANGLE_STRIP);
   void BindAndDrawQuad(ShaderProgramOGL *aProg,
                        GLuint aDrawMode = LOCAL_GL_TRIANGLE_STRIP);
   void BindAndDrawQuadWithTextureRect(ShaderProgramOGL *aProg,
                                       const gfx3DMatrix& aTextureTransform,
                                       const gfx::Rect& aTexCoordRect,
                                       TextureSource *aTexture);
   void CleanupResources();
   /**
    * Copies the content of our backbuffer to the set transaction target.
    * Does not restore the target FBO, so only call from EndFrame.
    */
   void CopyToTarget(gfx::DrawTarget* aTarget, const gfx::Matrix& aWorldMatrix);
   /**
    * Implements the flipping of the y-axis to convert from layers/compositor
    * coordinates to OpenGL coordinates.
    *
    * Indeed, the only coordinate system that OpenGL knows has the y-axis
    * pointing upwards, but the layers/compositor coordinate system has the
    * y-axis pointing downwards, for good reason as Web pages are typically
    * scrolled downwards. So, some flipping has to take place; FlippedY does it.
    */
   GLint FlipY(GLint y) const { return mHeight - y; }
   RefPtr<CompositorTexturePoolOGL> mTexturePool;
   bool mDestroyed;
   /**
    * Height of the OpenGL context's primary framebuffer in pixels. Used by
    * FlipY for the y-flipping calculation.
    */
   GLint mHeight;
 };
 }
 }
 #endif /* MOZILLA_GFX_COMPOSITOROGL_H */

The Tor Browser / annotate

gfx/layers/opengl/CompositorOGL.h@129ffea94266 (annotated)

gfx/layers/opengl/CompositorOGL.h