mirror of
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125 lines
3.0 KiB
C++
125 lines
3.0 KiB
C++
/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
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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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/* SharedSurface abstracts an actual surface (can be a GL texture, but
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* not necessarily) that handles sharing.
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* Its specializations are:
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* SharedSurface_Basic (client-side bitmap, does readback)
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* SharedSurface_GLTexture
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* SharedSurface_EGLImage
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* SharedSurface_ANGLEShareHandle
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*/
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#ifndef SHARED_SURFACE_H_
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#define SHARED_SURFACE_H_
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#include <stdint.h>
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#include "mozilla/Attributes.h"
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#include "GLDefs.h"
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#include "gfxPoint.h"
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#include "SurfaceTypes.h"
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namespace mozilla {
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namespace gfx {
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class SurfaceFactory;
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class SharedSurface
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{
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protected:
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const SharedSurfaceType mType;
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const APITypeT mAPI;
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const AttachmentType mAttachType;
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const gfxIntSize mSize;
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const bool mHasAlpha;
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bool mIsLocked;
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SharedSurface(SharedSurfaceType type,
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APITypeT api,
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AttachmentType attachType,
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const gfxIntSize& size,
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bool hasAlpha)
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: mType(type)
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, mAPI(api)
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, mAttachType(attachType)
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, mSize(size)
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, mHasAlpha(hasAlpha)
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, mIsLocked(false)
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{
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}
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public:
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virtual ~SharedSurface() {
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}
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static void Copy(SharedSurface* src, SharedSurface* dest,
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SurfaceFactory* factory);
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// This locks the SharedSurface as the production buffer for the context.
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// This is needed by backends which use PBuffers and/or EGLSurfaces.
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virtual void LockProd() {
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MOZ_ASSERT(!mIsLocked);
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LockProdImpl();
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mIsLocked = true;
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}
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// Unlocking is harmless if we're already unlocked.
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virtual void UnlockProd() {
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if (!mIsLocked)
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return;
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UnlockProdImpl();
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mIsLocked = false;
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}
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virtual void LockProdImpl() = 0;
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virtual void UnlockProdImpl() = 0;
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virtual void Fence() = 0;
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virtual bool WaitSync() = 0;
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SharedSurfaceType Type() const {
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return mType;
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}
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APITypeT APIType() const {
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return mAPI;
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}
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AttachmentType AttachType() const {
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return mAttachType;
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}
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const gfxIntSize& Size() const {
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return mSize;
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}
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bool HasAlpha() const {
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return mHasAlpha;
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}
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// For use when AttachType is correct.
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virtual GLuint Texture() const {
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MOZ_ASSERT(AttachType() == AttachmentType::GLTexture);
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MOZ_CRASH("Did you forget to override this function?");
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}
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virtual GLenum TextureTarget() const {
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return Texture() ? LOCAL_GL_TEXTURE_2D : 0;
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}
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virtual GLuint Renderbuffer() const {
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MOZ_ASSERT(AttachType() == AttachmentType::GLRenderbuffer);
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MOZ_CRASH("Did you forget to override this function?");
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}
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};
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} /* namespace gfx */
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} /* namespace mozilla */
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#endif /* SHARED_SURFACE_H_ */
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