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/* -*- 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"
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc
#include "mozilla/layers/TextureForwarder.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::LocalErrorScope localError(*gl);
GLuint tex = CreateTextureForOffscreen(gl, formats, size);
GLenum err = localError.GetError();
MOZ_ASSERT_IF(err != LOCAL_GL_NO_ERROR, err == LOCAL_GL_OUT_OF_MEMORY);
if (err) {
gl->fDeleteTextures(1, &tex);
return Move(ret);
}
bool ownsTex = true;
ret.reset( new SharedSurface_Basic(gl, size, hasAlpha, tex, ownsTex) );
return Move(ret);
}
/*static*/ UniquePtr<SharedSurface_Basic>
SharedSurface_Basic::Wrap(GLContext* gl,
const IntSize& size,
bool hasAlpha,
GLuint tex)
{
bool ownsTex = false;
UniquePtr<SharedSurface_Basic> ret( new SharedSurface_Basic(gl, size, hasAlpha, tex,
ownsTex) );
return Move(ret);
}
SharedSurface_Basic::SharedSurface_Basic(GLContext* gl,
const IntSize& size,
bool hasAlpha,
GLuint tex,
bool ownsTex)
: SharedSurface(SharedSurfaceType::Basic,
AttachmentType::GLTexture,
gl,
size,
hasAlpha,
true)
, mTex(tex)
, mOwnsTex(ownsTex)
, 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 || !mGL->MakeCurrent())
return;
if (mFB)
mGL->fDeleteFramebuffers(1, &mFB);
if (mOwnsTex)
mGL->fDeleteTextures(1, &mTex);
}
////////////////////////////////////////////////////////////////////////
SurfaceFactory_Basic::SurfaceFactory_Basic(GLContext* gl, const SurfaceCaps& caps,
const layers::TextureFlags& flags)
: SurfaceFactory(SharedSurfaceType::Basic, gl, caps, nullptr, flags)
{ }
////////////////////////////////////////////////////////////////////////
// SharedSurface_GLTexture
/*static*/ UniquePtr<SharedSurface_GLTexture>
SharedSurface_GLTexture::Create(GLContext* prodGL,
const GLFormats& formats,
const IntSize& size,
bool hasAlpha)
{
MOZ_ASSERT(prodGL);
prodGL->MakeCurrent();
UniquePtr<SharedSurface_GLTexture> ret;
GLContext::LocalErrorScope localError(*prodGL);
GLuint tex = CreateTextureForOffscreen(prodGL, formats, size);
GLenum err = localError.GetError();
MOZ_ASSERT_IF(err, err == LOCAL_GL_OUT_OF_MEMORY);
if (err) {
prodGL->fDeleteTextures(1, &tex);
return Move(ret);
}
ret.reset(new SharedSurface_GLTexture(prodGL, size,
hasAlpha, tex));
return Move(ret);
}
SharedSurface_GLTexture::~SharedSurface_GLTexture()
{
if (!mGL->MakeCurrent())
return;
if (mTex) {
mGL->fDeleteTextures(1, &mTex);
}
if (mSync) {
mGL->fDeleteSync(mSync);
}
}
void
SharedSurface_GLTexture::ProducerReleaseImpl()
{
mGL->MakeCurrent();
if (mGL->IsSupported(GLFeature::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::ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor)
{
*out_descriptor = layers::SurfaceDescriptorSharedGLTexture(ProdTexture(),
ProdTextureTarget(),
(uintptr_t)mSync,
mSize,
mHasAlpha);
// Transfer ownership of the fence to the host
mSync = nullptr;
return true;
}
} // namespace gl
} /* namespace mozilla */
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