gecko-dev/gfx/gl/SharedSurfaceEGL.cpp

238 строки
6.7 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 "SharedSurfaceEGL.h"
#include "GLBlitHelper.h"
#include "GLContextEGL.h"
#include "GLLibraryEGL.h"
#include "GLReadTexImageHelper.h"
#include "ScopedGLHelpers.h"
#include "SharedSurface.h"
#include "TextureGarbageBin.h"
namespace mozilla {
namespace gl {
/*static*/ UniquePtr<SharedSurface_EGLImage>
SharedSurface_EGLImage::Create(GLContext* prodGL,
const GLFormats& formats,
const gfx::IntSize& size,
bool hasAlpha,
EGLContext context)
{
GLLibraryEGL* egl = &sEGLLibrary;
MOZ_ASSERT(egl);
MOZ_ASSERT(context);
UniquePtr<SharedSurface_EGLImage> ret;
if (!HasExtensions(egl, prodGL)) {
return Move(ret);
}
MOZ_ALWAYS_TRUE(prodGL->MakeCurrent());
GLuint prodTex = CreateTextureForOffscreen(prodGL, formats, size);
if (!prodTex) {
return Move(ret);
}
EGLClientBuffer buffer = reinterpret_cast<EGLClientBuffer>(prodTex);
EGLImage image = egl->fCreateImage(egl->Display(), context,
LOCAL_EGL_GL_TEXTURE_2D, buffer,
nullptr);
if (!image) {
prodGL->fDeleteTextures(1, &prodTex);
return Move(ret);
}
ret.reset( new SharedSurface_EGLImage(prodGL, egl, size, hasAlpha,
formats, prodTex, image) );
return Move(ret);
}
bool
SharedSurface_EGLImage::HasExtensions(GLLibraryEGL* egl, GLContext* gl)
{
return egl->HasKHRImageBase() &&
egl->IsExtensionSupported(GLLibraryEGL::KHR_gl_texture_2D_image) &&
gl->IsExtensionSupported(GLContext::OES_EGL_image_external);
}
SharedSurface_EGLImage::SharedSurface_EGLImage(GLContext* gl,
GLLibraryEGL* egl,
const gfx::IntSize& size,
bool hasAlpha,
const GLFormats& formats,
GLuint prodTex,
EGLImage image)
: SharedSurface(SharedSurfaceType::EGLImageShare,
AttachmentType::GLTexture,
gl,
size,
hasAlpha)
, mMutex("SharedSurface_EGLImage mutex")
, mEGL(egl)
, mFormats(formats)
, mProdTex(prodTex)
, mImage(image)
, mCurConsGL(nullptr)
, mConsTex(0)
, mSync(0)
{}
SharedSurface_EGLImage::~SharedSurface_EGLImage()
{
mEGL->fDestroyImage(Display(), mImage);
mGL->MakeCurrent();
mGL->fDeleteTextures(1, &mProdTex);
mProdTex = 0;
if (mConsTex) {
MOZ_ASSERT(mGarbageBin);
mGarbageBin->Trash(mConsTex);
mConsTex = 0;
}
if (mSync) {
// We can't call this unless we have the ext, but we will always have
// the ext if we have something to destroy.
mEGL->fDestroySync(Display(), mSync);
mSync = 0;
}
}
void
SharedSurface_EGLImage::Fence()
{
MutexAutoLock lock(mMutex);
mGL->MakeCurrent();
if (mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync) &&
mGL->IsExtensionSupported(GLContext::OES_EGL_sync))
{
if (mSync) {
MOZ_ALWAYS_TRUE( mEGL->fDestroySync(Display(), mSync) );
mSync = 0;
}
mSync = mEGL->fCreateSync(Display(),
LOCAL_EGL_SYNC_FENCE,
nullptr);
if (mSync) {
mGL->fFlush();
return;
}
}
MOZ_ASSERT(!mSync);
mGL->fFinish();
}
bool
SharedSurface_EGLImage::WaitSync()
{
MutexAutoLock lock(mMutex);
if (!mSync) {
// We must not be needed.
return true;
}
MOZ_ASSERT(mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync));
// Wait FOREVER, primarily because some NVIDIA (at least Tegra) drivers
// have ClientWaitSync returning immediately if the timeout delay is anything
// else than FOREVER.
//
// FIXME: should we try to use a finite timeout delay where possible?
EGLint status = mEGL->fClientWaitSync(Display(),
mSync,
0,
LOCAL_EGL_FOREVER);
if (status != LOCAL_EGL_CONDITION_SATISFIED) {
return false;
}
MOZ_ALWAYS_TRUE( mEGL->fDestroySync(Display(), mSync) );
mSync = 0;
return true;
}
bool
SharedSurface_EGLImage::PollSync()
{
MutexAutoLock lock(mMutex);
if (!mSync) {
// We must not be needed.
return true;
}
MOZ_ASSERT(mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync));
EGLint status = 0;
MOZ_ALWAYS_TRUE( mEGL->fGetSyncAttrib(mEGL->Display(),
mSync,
LOCAL_EGL_SYNC_STATUS_KHR,
&status) );
if (status != LOCAL_EGL_SIGNALED_KHR) {
return false;
}
MOZ_ALWAYS_TRUE( mEGL->fDestroySync(mEGL->Display(), mSync) );
mSync = 0;
return true;
}
EGLDisplay
SharedSurface_EGLImage::Display() const
{
return mEGL->Display();
}
void
SharedSurface_EGLImage::AcquireConsumerTexture(GLContext* consGL, GLuint* out_texture, GLuint* out_target)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(!mCurConsGL || consGL == mCurConsGL);
if (!mConsTex) {
consGL->fGenTextures(1, &mConsTex);
MOZ_ASSERT(mConsTex);
ScopedBindTexture autoTex(consGL, mConsTex, LOCAL_GL_TEXTURE_EXTERNAL);
consGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_EXTERNAL, mImage);
mCurConsGL = consGL;
mGarbageBin = consGL->TexGarbageBin();
}
MOZ_ASSERT(consGL == mCurConsGL);
*out_texture = mConsTex;
*out_target = LOCAL_GL_TEXTURE_EXTERNAL;
}
/*static*/ UniquePtr<SurfaceFactory_EGLImage>
SurfaceFactory_EGLImage::Create(GLContext* prodGL,
const SurfaceCaps& caps)
{
EGLContext context = GLContextEGL::Cast(prodGL)->GetEGLContext();
typedef SurfaceFactory_EGLImage ptrT;
UniquePtr<ptrT> ret;
GLLibraryEGL* egl = &sEGLLibrary;
if (SharedSurface_EGLImage::HasExtensions(egl, prodGL)) {
ret.reset( new ptrT(prodGL, context, caps) );
}
return Move(ret);
}
} /* namespace gfx */
} /* namespace mozilla */