gecko/gfx/gl/SharedSurfaceEGL.cpp
2014-02-27 20:25:55 -08:00

300 lines
8.0 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/. */
#include "SharedSurfaceEGL.h"
#include "GLContextEGL.h"
#include "GLBlitHelper.h"
#include "ScopedGLHelpers.h"
#include "SharedSurfaceGL.h"
#include "SurfaceFactory.h"
#include "GLLibraryEGL.h"
#include "TextureGarbageBin.h"
#include "GLReadTexImageHelper.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace gl {
SharedSurface_EGLImage*
SharedSurface_EGLImage::Create(GLContext* prodGL,
const GLFormats& formats,
const gfx::IntSize& size,
bool hasAlpha,
EGLContext context)
{
GLLibraryEGL* egl = &sEGLLibrary;
MOZ_ASSERT(egl);
if (!HasExtensions(egl, prodGL))
return nullptr;
MOZ_ALWAYS_TRUE(prodGL->MakeCurrent());
GLuint prodTex = CreateTextureForOffscreen(prodGL, formats, size);
if (!prodTex)
return nullptr;
return new SharedSurface_EGLImage(prodGL, egl,
size, hasAlpha,
formats, prodTex);
}
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);
}
SharedSurface_EGLImage::SharedSurface_EGLImage(GLContext* gl,
GLLibraryEGL* egl,
const gfx::IntSize& size,
bool hasAlpha,
const GLFormats& formats,
GLuint prodTex)
: SharedSurface_GL(SharedSurfaceType::EGLImageShare,
AttachmentType::GLTexture,
gl,
size,
hasAlpha)
, mMutex("SharedSurface_EGLImage mutex")
, mEGL(egl)
, mFormats(formats)
, mProdTex(prodTex)
, mProdTexForPipe(0)
, mImage(0)
, mCurConsGL(nullptr)
, mConsTex(0)
, mSync(0)
, mPipeFailed(false)
, mPipeComplete(false)
, mPipeActive(false)
{}
SharedSurface_EGLImage::~SharedSurface_EGLImage()
{
mEGL->fDestroyImage(Display(), mImage);
mImage = 0;
mGL->MakeCurrent();
mGL->fDeleteTextures(1, &mProdTex);
mProdTex = 0;
if (mProdTexForPipe) {
mGL->fDeleteTextures(1, &mProdTexForPipe);
mProdTexForPipe = 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::LockProdImpl()
{
MutexAutoLock lock(mMutex);
if (!mPipeComplete)
return;
if (mPipeActive)
return;
mGL->BlitHelper()->BlitTextureToTexture(mProdTex, mProdTexForPipe, Size(), Size());
mGL->fDeleteTextures(1, &mProdTex);
mProdTex = mProdTexForPipe;
mProdTexForPipe = 0;
mPipeActive = true;
}
static bool
CreateTexturePipe(GLLibraryEGL* const egl, GLContext* const gl,
const GLFormats& formats, const gfx::IntSize& size,
GLuint* const out_tex, EGLImage* const out_image)
{
MOZ_ASSERT(out_tex && out_image);
*out_tex = 0;
*out_image = 0;
GLuint tex = CreateTextureForOffscreen(gl, formats, size);
if (!tex)
return false;
EGLContext context = GLContextEGL::Cast(gl)->GetEGLContext();
MOZ_ASSERT(context);
EGLClientBuffer buffer = reinterpret_cast<EGLClientBuffer>(tex);
EGLImage image = egl->fCreateImage(egl->Display(), context,
LOCAL_EGL_GL_TEXTURE_2D, buffer,
nullptr);
if (!image) {
gl->fDeleteTextures(1, &tex);
return false;
}
// Success.
*out_tex = tex;
*out_image = image;
return true;
}
void
SharedSurface_EGLImage::Fence()
{
MutexAutoLock lock(mMutex);
mGL->MakeCurrent();
if (!mPipeActive) {
MOZ_ASSERT(!mSync);
MOZ_ASSERT(!mPipeComplete);
if (!mPipeFailed) {
if (!CreateTexturePipe(mEGL, mGL, mFormats, Size(),
&mProdTexForPipe, &mImage))
{
mPipeFailed = true;
}
}
if (!mPixels) {
SurfaceFormat format =
HasAlpha() ? SurfaceFormat::B8G8R8A8
: SurfaceFormat::B8G8R8X8;
mPixels = Factory::CreateDataSourceSurface(Size(), format);
}
DataSourceSurface::MappedSurface map;
mPixels->Map(DataSourceSurface::MapType::WRITE, &map);
nsRefPtr<gfxImageSurface> wrappedData =
new gfxImageSurface(map.mData,
ThebesIntSize(mPixels->GetSize()),
map.mStride,
SurfaceFormatToImageFormat(mPixels->GetFormat()));
ReadScreenIntoImageSurface(mGL, wrappedData);
mPixels->Unmap();
return;
}
MOZ_ASSERT(mPipeActive);
MOZ_ASSERT(mCurConsGL);
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;
}
EGLDisplay
SharedSurface_EGLImage::Display() const
{
return mEGL->Display();
}
GLuint
SharedSurface_EGLImage::AcquireConsumerTexture(GLContext* consGL)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(!mCurConsGL || consGL == mCurConsGL);
if (mPipeFailed)
return 0;
if (mPipeActive) {
MOZ_ASSERT(mConsTex);
return mConsTex;
}
if (!mConsTex) {
consGL->fGenTextures(1, &mConsTex);
ScopedBindTexture autoTex(consGL, mConsTex);
consGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_2D, mImage);
mPipeComplete = true;
mCurConsGL = consGL;
mGarbageBin = consGL->TexGarbageBin();
}
MOZ_ASSERT(consGL == mCurConsGL);
return 0;
}
DataSourceSurface*
SharedSurface_EGLImage::GetPixels() const
{
MutexAutoLock lock(mMutex);
return mPixels;
}
SurfaceFactory_EGLImage*
SurfaceFactory_EGLImage::Create(GLContext* prodGL,
const SurfaceCaps& caps)
{
EGLContext context = GLContextEGL::Cast(prodGL)->GetEGLContext();
return new SurfaceFactory_EGLImage(prodGL, context, caps);
}
} /* namespace gfx */
} /* namespace mozilla */