1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/SharedSurface.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,108 @@
1.4 +/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* SharedSurface abstracts an actual surface (can be a GL texture, but
1.10 + * not necessarily) that handles sharing.
1.11 + * Its specializations are:
1.12 + * SharedSurface_Basic (client-side bitmap, does readback)
1.13 + * SharedSurface_GLTexture
1.14 + * SharedSurface_EGLImage
1.15 + * SharedSurface_ANGLEShareHandle
1.16 + */
1.17 +
1.18 +#ifndef SHARED_SURFACE_H_
1.19 +#define SHARED_SURFACE_H_
1.20 +
1.21 +#include <stdint.h>
1.22 +#include "mozilla/Attributes.h"
1.23 +#include "GLDefs.h"
1.24 +#include "mozilla/gfx/Point.h"
1.25 +#include "SurfaceTypes.h"
1.26 +
1.27 +namespace mozilla {
1.28 +namespace gfx {
1.29 +
1.30 +class SurfaceFactory;
1.31 +
1.32 +class SharedSurface
1.33 +{
1.34 +protected:
1.35 + const SharedSurfaceType mType;
1.36 + const APITypeT mAPI;
1.37 + const AttachmentType mAttachType;
1.38 + const gfx::IntSize mSize;
1.39 + const bool mHasAlpha;
1.40 + bool mIsLocked;
1.41 +
1.42 + SharedSurface(SharedSurfaceType type,
1.43 + APITypeT api,
1.44 + AttachmentType attachType,
1.45 + const gfx::IntSize& size,
1.46 + bool hasAlpha)
1.47 + : mType(type)
1.48 + , mAPI(api)
1.49 + , mAttachType(attachType)
1.50 + , mSize(size)
1.51 + , mHasAlpha(hasAlpha)
1.52 + , mIsLocked(false)
1.53 + {
1.54 + }
1.55 +
1.56 +public:
1.57 + virtual ~SharedSurface() {
1.58 + }
1.59 +
1.60 + static void Copy(SharedSurface* src, SharedSurface* dest,
1.61 + SurfaceFactory* factory);
1.62 +
1.63 + // This locks the SharedSurface as the production buffer for the context.
1.64 + // This is needed by backends which use PBuffers and/or EGLSurfaces.
1.65 + virtual void LockProd() {
1.66 + MOZ_ASSERT(!mIsLocked);
1.67 + LockProdImpl();
1.68 + mIsLocked = true;
1.69 + }
1.70 +
1.71 + // Unlocking is harmless if we're already unlocked.
1.72 + virtual void UnlockProd() {
1.73 + if (!mIsLocked)
1.74 + return;
1.75 +
1.76 + UnlockProdImpl();
1.77 + mIsLocked = false;
1.78 + }
1.79 +
1.80 + virtual void LockProdImpl() = 0;
1.81 + virtual void UnlockProdImpl() = 0;
1.82 +
1.83 + virtual void Fence() = 0;
1.84 + virtual bool WaitSync() = 0;
1.85 +
1.86 +
1.87 + SharedSurfaceType Type() const {
1.88 + return mType;
1.89 + }
1.90 +
1.91 + APITypeT APIType() const {
1.92 + return mAPI;
1.93 + }
1.94 +
1.95 + AttachmentType AttachType() const {
1.96 + return mAttachType;
1.97 + }
1.98 +
1.99 + const gfx::IntSize& Size() const {
1.100 + return mSize;
1.101 + }
1.102 +
1.103 + bool HasAlpha() const {
1.104 + return mHasAlpha;
1.105 + }
1.106 +};
1.107 +
1.108 +} /* namespace gfx */
1.109 +} /* namespace mozilla */
1.110 +
1.111 +#endif /* SHARED_SURFACE_H_ */
