The Tor Browser: gfx/gl/SharedSurfaceGL.h@6474c204b198 (annotated)

gfx/gl/SharedSurfaceGL.h@6474c204b198 (annotated)

gfx/gl/SharedSurfaceGL.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
 /* 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 SHARED_SURFACE_GL_H_
 #define SHARED_SURFACE_GL_H_
 #include "ScopedGLHelpers.h"
 #include "SharedSurface.h"
 #include "SurfaceFactory.h"
 #include "SurfaceTypes.h"
 #include "GLContextTypes.h"
 #include "nsAutoPtr.h"
 #include "gfxTypes.h"
 #include "mozilla/Mutex.h"
 #include <queue>
 // Forwards:
 namespace mozilla {
     namespace gl {
         class GLContext;
     }
     namespace gfx {
         class DataSourceSurface;
     }
 }
 namespace mozilla {
 namespace gl {
 class SurfaceFactory_GL;
 class SharedSurface_GL
     : public gfx::SharedSurface
 {
 protected:
     typedef class gfx::SharedSurface SharedSurface;
     typedef gfx::SharedSurfaceType SharedSurfaceType;
     typedef gfx::APITypeT APITypeT;
     typedef gfx::AttachmentType AttachmentType;
     GLContext* const mGL;
     SharedSurface_GL(SharedSurfaceType type,
                      AttachmentType attachType,
                      GLContext* gl,
                      const gfx::IntSize& size,
                      bool hasAlpha)
         : SharedSurface(type, APITypeT::OpenGL, attachType, size, hasAlpha)
         , mGL(gl)
     {}
 public:
     static void ProdCopy(SharedSurface_GL* src, SharedSurface_GL* dest,
                          SurfaceFactory_GL* factory);
     static SharedSurface_GL* Cast(SharedSurface* surf) {
         MOZ_ASSERT(surf->APIType() == APITypeT::OpenGL);
         return (SharedSurface_GL*)surf;
     }
     // For use when AttachType is correct.
     virtual GLuint ProdTexture() {
         MOZ_ASSERT(AttachType() == AttachmentType::GLTexture);
         MOZ_CRASH("Did you forget to override this function?");
     }
     virtual GLenum ProdTextureTarget() const {
         return LOCAL_GL_TEXTURE_2D;
     }
     virtual GLuint ProdRenderbuffer() {
         MOZ_ASSERT(AttachType() == AttachmentType::GLRenderbuffer);
         MOZ_CRASH("Did you forget to override this function?");
     }
     virtual bool ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
                             GLenum format, GLenum type, GLvoid *pixels) {
         return false;
     }
     virtual void LockProd() MOZ_OVERRIDE;
     virtual void UnlockProd() MOZ_OVERRIDE;
     GLContext* GL() const {
         return mGL;
     }
 };
 class SurfaceFactory_GL
     : public gfx::SurfaceFactory
 {
 protected:
     typedef struct gfx::SurfaceCaps SurfaceCaps;
     typedef class gfx::SurfaceFactory SurfaceFactory;
     typedef class gfx::SharedSurface SharedSurface;
     typedef gfx::SharedSurfaceType SharedSurfaceType;
     GLContext* const mGL;
     const GLFormats mFormats;
     SurfaceCaps mDrawCaps;
     SurfaceCaps mReadCaps;
     // This uses ChooseBufferBits to pick drawBits/readBits.
     SurfaceFactory_GL(GLContext* gl,
                       SharedSurfaceType type,
                       const SurfaceCaps& caps);
     virtual void ChooseBufferBits(const SurfaceCaps& caps,
                                   SurfaceCaps& drawCaps,
                                   SurfaceCaps& readCaps) const;
 public:
     GLContext* GL() const {
         return mGL;
     }
     const GLFormats& Formats() const {
         return mFormats;
     }
     const SurfaceCaps& DrawCaps() const {
         return mDrawCaps;
     }
     const SurfaceCaps& ReadCaps() const {
         return mReadCaps;
     }
 };
 // For readback and bootstrapping:
 class SharedSurface_Basic
     : public SharedSurface_GL
 {
 public:
     static SharedSurface_Basic* Create(GLContext* gl,
                                        const GLFormats& formats,
                                        const gfx::IntSize& size,
                                        bool hasAlpha);
     static SharedSurface_Basic* Cast(SharedSurface* surf) {
         MOZ_ASSERT(surf->Type() == SharedSurfaceType::Basic);
         return (SharedSurface_Basic*)surf;
     }
 protected:
     const GLuint mTex;
     GLuint mFB;
     RefPtr<gfx::DataSourceSurface> mData;
     SharedSurface_Basic(GLContext* gl,
                         const gfx::IntSize& size,
                         bool hasAlpha,
                         gfx::SurfaceFormat format,
                         GLuint tex);
 public:
     virtual ~SharedSurface_Basic();
     virtual void LockProdImpl() MOZ_OVERRIDE {}
     virtual void UnlockProdImpl() MOZ_OVERRIDE {}
     virtual void Fence() MOZ_OVERRIDE;
     virtual bool WaitSync() MOZ_OVERRIDE {
         // Since we already store the data in Fence, we're always done already.
         return true;
     }
     virtual GLuint ProdTexture() MOZ_OVERRIDE {
         return mTex;
     }
     // Implementation-specific functions below:
     gfx::DataSourceSurface* GetData() {
         return mData;
     }
 };
 class SurfaceFactory_Basic
     : public SurfaceFactory_GL
 {
 public:
     SurfaceFactory_Basic(GLContext* gl, const SurfaceCaps& caps)
         : SurfaceFactory_GL(gl, SharedSurfaceType::Basic, caps)
     {}
     virtual SharedSurface* CreateShared(const gfx::IntSize& size) MOZ_OVERRIDE {
         bool hasAlpha = mReadCaps.alpha;
         return SharedSurface_Basic::Create(mGL, mFormats, size, hasAlpha);
     }
 };
 // Using shared GL textures:
 class SharedSurface_GLTexture
     : public SharedSurface_GL
 {
 public:
     static SharedSurface_GLTexture* Create(GLContext* prodGL,
                                            GLContext* consGL,
                                            const GLFormats& formats,
                                            const gfx::IntSize& size,
                                            bool hasAlpha,
                                            GLuint texture = 0);
     static SharedSurface_GLTexture* Cast(SharedSurface* surf) {
         MOZ_ASSERT(surf->Type() == SharedSurfaceType::GLTextureShare);
         return (SharedSurface_GLTexture*)surf;
     }
 protected:
     GLContext* mConsGL;
     const GLuint mTex;
     const bool mOwnsTex;
     GLsync mSync;
     mutable Mutex mMutex;
     SharedSurface_GLTexture(GLContext* prodGL,
                             GLContext* consGL,
                             const gfx::IntSize& size,
                             bool hasAlpha,
                             GLuint tex,
                             bool ownsTex)
         : SharedSurface_GL(SharedSurfaceType::GLTextureShare,
                            AttachmentType::GLTexture,
                            prodGL,
                            size,
                            hasAlpha)
         , mConsGL(consGL)
         , mTex(tex)
         , mOwnsTex(ownsTex)
         , mSync(0)
         , mMutex("SharedSurface_GLTexture mutex")
     {
     }
 public:
     virtual ~SharedSurface_GLTexture();
     virtual void LockProdImpl() MOZ_OVERRIDE {}
     virtual void UnlockProdImpl() MOZ_OVERRIDE {}
     virtual void Fence() MOZ_OVERRIDE;
     virtual bool WaitSync() MOZ_OVERRIDE;
     virtual GLuint ProdTexture() MOZ_OVERRIDE {
         return mTex;
     }
     // Custom:
     GLuint ConsTexture(GLContext* consGL);
     GLenum ConsTextureTarget() const {
         return ProdTextureTarget();
     }
 };
 class SurfaceFactory_GLTexture
     : public SurfaceFactory_GL
 {
 protected:
     GLContext* const mConsGL;
 public:
     // If we don't know `consGL` at construction time, use `nullptr`, and call
     // `SetConsumerGL()` on each `SharedSurface_GLTexture` before calling its
     // `WaitSync()`.
     SurfaceFactory_GLTexture(GLContext* prodGL,
                              GLContext* consGL,
                              const SurfaceCaps& caps)
         : SurfaceFactory_GL(prodGL, SharedSurfaceType::GLTextureShare, caps)
         , mConsGL(consGL)
     {
         MOZ_ASSERT(consGL != prodGL);
     }
     virtual SharedSurface* CreateShared(const gfx::IntSize& size) MOZ_OVERRIDE {
         bool hasAlpha = mReadCaps.alpha;
         return SharedSurface_GLTexture::Create(mGL, mConsGL, mFormats, size, hasAlpha);
     }
 };
 } /* namespace gfx */
 } /* namespace mozilla */
 #endif /* SHARED_SURFACE_GL_H_ */

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gfx/gl/SharedSurfaceGL.h@6474c204b198 (annotated)

gfx/gl/SharedSurfaceGL.h