gecko/gfx/gl/SharedSurfaceGL.cpp

242 lines
6.2 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/. */
#include "SharedSurfaceGL.h"
#include "GLBlitHelper.h"
#include "GLContext.h"
#include "GLReadTexImageHelper.h"
#include "mozilla/gfx/2D.h"
#include "ScopedGLHelpers.h"
namespace mozilla {
namespace gl {
using gfx::IntSize;
using gfx::SurfaceFormat;
/*static*/ UniquePtr<SharedSurface_Basic>
SharedSurface_Basic::Create(GLContext* gl,
const GLFormats& formats,
const IntSize& size,
bool hasAlpha)
{
UniquePtr<SharedSurface_Basic> ret;
gl->MakeCurrent();
GLContext::ScopedLocalErrorCheck localError(gl);
GLuint tex = CreateTexture(gl, formats.color_texInternalFormat,
formats.color_texFormat,
formats.color_texType,
size);
GLenum err = localError.GetLocalError();
if (err) {
gl->fDeleteTextures(1, &tex);
return Move(ret);
}
SurfaceFormat format = SurfaceFormat::B8G8R8X8;
switch (formats.color_texInternalFormat) {
case LOCAL_GL_RGB:
case LOCAL_GL_RGB8:
if (formats.color_texType == LOCAL_GL_UNSIGNED_SHORT_5_6_5)
format = SurfaceFormat::R5G6B5;
else
format = SurfaceFormat::B8G8R8X8;
break;
case LOCAL_GL_RGBA:
case LOCAL_GL_RGBA8:
format = SurfaceFormat::B8G8R8A8;
break;
default:
MOZ_CRASH("Unhandled Tex format.");
}
ret.reset( new SharedSurface_Basic(gl, size, hasAlpha, format, tex) );
return Move(ret);
}
SharedSurface_Basic::SharedSurface_Basic(GLContext* gl,
const IntSize& size,
bool hasAlpha,
SurfaceFormat format,
GLuint tex)
: SharedSurface(SharedSurfaceType::Basic,
AttachmentType::GLTexture,
gl,
size,
hasAlpha)
, mTex(tex)
, mFB(0)
{
mGL->MakeCurrent();
mGL->fGenFramebuffers(1, &mFB);
ScopedBindFramebuffer autoFB(mGL, mFB);
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
LOCAL_GL_TEXTURE_2D,
mTex,
0);
DebugOnly<GLenum> status = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
MOZ_ASSERT(status == LOCAL_GL_FRAMEBUFFER_COMPLETE);
}
SharedSurface_Basic::~SharedSurface_Basic()
{
if (!mGL->MakeCurrent())
return;
if (mFB)
mGL->fDeleteFramebuffers(1, &mFB);
mGL->fDeleteTextures(1, &mTex);
}
////////////////////////////////////////////////////////////////////////
// SharedSurface_GLTexture
/*static*/ UniquePtr<SharedSurface_GLTexture>
SharedSurface_GLTexture::Create(GLContext* prodGL,
GLContext* consGL,
const GLFormats& formats,
const IntSize& size,
bool hasAlpha,
GLuint texture)
{
MOZ_ASSERT(prodGL);
MOZ_ASSERT(!consGL || prodGL->SharesWith(consGL));
prodGL->MakeCurrent();
GLuint tex = texture;
bool ownsTex = false;
UniquePtr<SharedSurface_GLTexture> ret;
if (!tex) {
GLContext::ScopedLocalErrorCheck localError(prodGL);
tex = CreateTextureForOffscreen(prodGL, formats, size);
GLenum err = localError.GetLocalError();
if (err) {
prodGL->fDeleteTextures(1, &tex);
return Move(ret);
}
ownsTex = true;
}
ret.reset( new SharedSurface_GLTexture(prodGL, consGL, size,
hasAlpha, tex, ownsTex) );
return Move(ret);
}
SharedSurface_GLTexture::~SharedSurface_GLTexture()
{
if (!mGL->MakeCurrent())
return;
if (mOwnsTex) {
mGL->fDeleteTextures(1, &mTex);
}
if (mSync) {
mGL->fDeleteSync(mSync);
}
}
void
SharedSurface_GLTexture::Fence()
{
MutexAutoLock lock(mMutex);
mGL->MakeCurrent();
if (mConsGL && mGL->IsExtensionSupported(GLContext::ARB_sync)) {
if (mSync) {
mGL->fDeleteSync(mSync);
mSync = 0;
}
mSync = mGL->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
if (mSync) {
mGL->fFlush();
return;
}
}
MOZ_ASSERT(!mSync);
mGL->fFinish();
}
bool
SharedSurface_GLTexture::WaitSync()
{
MutexAutoLock lock(mMutex);
if (!mSync) {
// We either used glFinish, or we passed this fence already.
// (PollSync/WaitSync returned true previously)
return true;
}
mConsGL->MakeCurrent();
MOZ_ASSERT(mConsGL->IsExtensionSupported(GLContext::ARB_sync));
mConsGL->fWaitSync(mSync,
0,
LOCAL_GL_TIMEOUT_IGNORED);
mConsGL->fDeleteSync(mSync);
mSync = 0;
return true;
}
bool
SharedSurface_GLTexture::PollSync()
{
MutexAutoLock lock(mMutex);
if (!mSync) {
// We either used glFinish, or we passed this fence already.
// (PollSync/WaitSync returned true previously)
return true;
}
mConsGL->MakeCurrent();
MOZ_ASSERT(mConsGL->IsExtensionSupported(GLContext::ARB_sync));
GLint status = 0;
mConsGL->fGetSynciv(mSync,
LOCAL_GL_SYNC_STATUS,
1,
nullptr,
&status);
if (status != LOCAL_GL_SIGNALED)
return false;
mConsGL->fDeleteSync(mSync);
mSync = 0;
return true;
}
GLuint
SharedSurface_GLTexture::ConsTexture(GLContext* consGL)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(consGL);
MOZ_ASSERT(mGL->SharesWith(consGL));
MOZ_ASSERT_IF(mConsGL, consGL == mConsGL);
mConsGL = consGL;
return mTex;
}
} /* namespace gfx */
} /* namespace mozilla */