import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/gl/SharedSurfaceGL.h

@@ -0,0 +1,167 @@
+/* -*- 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 "SurfaceTypes.h"
+#include "GLContextTypes.h"
+#include "gfxTypes.h"
+#include "mozilla/Mutex.h"
+
+#include <queue>
+
+namespace mozilla {
+    namespace gl {
+        class GLContext;
+    } // namespace gl
+    namespace gfx {
+        class DataSourceSurface;
+    } // namespace gfx
+} // namespace mozilla
+
+namespace mozilla {
+namespace gl {
+
+// For readback and bootstrapping:
+class SharedSurface_Basic
+    : public SharedSurface
+{
+public:
+    static UniquePtr<SharedSurface_Basic> Create(GLContext* gl,
+                                                 const GLFormats& formats,
+                                                 const gfx::IntSize& size,
+                                                 bool hasAlpha);
+
+    static UniquePtr<SharedSurface_Basic> Wrap(GLContext* gl,
+                                               const gfx::IntSize& size,
+                                               bool hasAlpha,
+                                               GLuint tex);
+
+    static SharedSurface_Basic* Cast(SharedSurface* surf) {
+        MOZ_ASSERT(surf->mType == SharedSurfaceType::Basic);
+
+        return (SharedSurface_Basic*)surf;
+    }
+
+protected:
+    const GLuint mTex;
+    const bool mOwnsTex;
+    GLuint mFB;
+
+    SharedSurface_Basic(GLContext* gl,
+                        const gfx::IntSize& size,
+                        bool hasAlpha,
+                        GLuint tex,
+                        bool ownsTex);
+
+public:
+    virtual ~SharedSurface_Basic();
+
+    virtual void LockProdImpl() override {}
+    virtual void UnlockProdImpl() override {}
+
+    virtual void ProducerAcquireImpl() override {}
+    virtual void ProducerReleaseImpl() override {}
+
+    virtual GLuint ProdTexture() override {
+        return mTex;
+    }
+
+    virtual bool ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor) override {
+        MOZ_CRASH("GFX: ToSurfaceDescriptor");
+        return false;
+    }
+};
+
+class SurfaceFactory_Basic
+    : public SurfaceFactory
+{
+public:
+    SurfaceFactory_Basic(GLContext* gl, const SurfaceCaps& caps,
+                         const layers::TextureFlags& flags);
+
+    virtual UniquePtr<SharedSurface> CreateShared(const gfx::IntSize& size) override {
+        bool hasAlpha = mReadCaps.alpha;
+        return SharedSurface_Basic::Create(mGL, mFormats, size, hasAlpha);
+    }
+};
+
+
+// Using shared GL textures:
+class SharedSurface_GLTexture
+    : public SharedSurface
+{
+public:
+    static UniquePtr<SharedSurface_GLTexture> Create(GLContext* prodGL,
+                                                     const GLFormats& formats,
+                                                     const gfx::IntSize& size,
+                                                     bool hasAlpha);
+
+    static SharedSurface_GLTexture* Cast(SharedSurface* surf) {
+        MOZ_ASSERT(surf->mType == SharedSurfaceType::SharedGLTexture);
+
+        return (SharedSurface_GLTexture*)surf;
+    }
+
+protected:
+    const GLuint mTex;
+    GLsync mSync;
+
+    SharedSurface_GLTexture(GLContext* prodGL,
+                            const gfx::IntSize& size,
+                            bool hasAlpha,
+                            GLuint tex)
+        : SharedSurface(SharedSurfaceType::SharedGLTexture,
+                        AttachmentType::GLTexture,
+                        prodGL,
+                        size,
+                        hasAlpha, true)
+        , mTex(tex)
+        , mSync(0)
+    {
+    }
+
+public:
+    virtual ~SharedSurface_GLTexture();
+
+    virtual void LockProdImpl() override {}
+    virtual void UnlockProdImpl() override {}
+
+    virtual void ProducerAcquireImpl() override {}
+    virtual void ProducerReleaseImpl() override;
+
+    virtual GLuint ProdTexture() override {
+        return mTex;
+    }
+
+    virtual bool ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor) override;
+};
+
+class SurfaceFactory_GLTexture
+    : public SurfaceFactory
+{
+public:
+    SurfaceFactory_GLTexture(GLContext* prodGL,
+                             const SurfaceCaps& caps,
+                             const RefPtr<layers::LayersIPCChannel>& allocator,
+                             const layers::TextureFlags& flags)
+        : SurfaceFactory(SharedSurfaceType::SharedGLTexture, prodGL, caps, allocator, flags)
+    {
+    }
+
+    virtual UniquePtr<SharedSurface> CreateShared(const gfx::IntSize& size) override {
+        bool hasAlpha = mReadCaps.alpha;
+        return SharedSurface_GLTexture::Create(mGL, mFormats, size, hasAlpha);
+    }
+};
+
+} // namespace gl
+
+} /* namespace mozilla */
+
+#endif /* SHARED_SURFACE_GL_H_ */