gecko/gfx/gl/SharedSurface.h

125 lines
3.0 KiB
C++

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