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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/gl_image_surface_texture.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/android/surface_texture.h"
namespace gl {
GLImageSurfaceTexture::GLImageSurfaceTexture(const gfx::Size& size)
: size_(size), texture_id_(0) {}
GLImageSurfaceTexture::~GLImageSurfaceTexture() {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!surface_texture_.get());
DCHECK_EQ(0, texture_id_);
}
bool GLImageSurfaceTexture::Initialize(gfx::SurfaceTexture* surface_texture) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!surface_texture_.get());
surface_texture_ = surface_texture;
return true;
}
void GLImageSurfaceTexture::Destroy(bool have_context) {
DCHECK(thread_checker_.CalledOnValidThread());
surface_texture_ = NULL;
texture_id_ = 0;
}
gfx::Size GLImageSurfaceTexture::GetSize() {
return size_;
}
unsigned GLImageSurfaceTexture::GetInternalFormat() { return GL_RGBA; }
bool GLImageSurfaceTexture::BindTexImage(unsigned target) {
TRACE_EVENT0("gpu", "GLImageSurfaceTexture::BindTexImage");
DCHECK(thread_checker_.CalledOnValidThread());
if (target != GL_TEXTURE_EXTERNAL_OES) {
LOG(ERROR)
<< "Surface texture can only be bound to TEXTURE_EXTERNAL_OES target";
return false;
}
GLint texture_id;
glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id);
DCHECK(texture_id);
if (texture_id_ && texture_id_ != texture_id) {
LOG(ERROR) << "Surface texture can only be bound to one texture ID";
return false;
}
DCHECK(surface_texture_.get());
if (texture_id != texture_id_) {
// Note: Surface textures used as gpu memory buffers are created with an
// initial dummy texture id of 0. We need to call DetachFromGLContext() here
// to detach from the dummy texture before we can attach to a real texture
// id. DetachFromGLContext() will delete the texture for the current
// attachment point so it's important that this is never called when
// attached to a real texture id. Detaching from the dummy texture id should
// not cause any problems as the GL should silently ignore 0 when passed to
// glDeleteTextures.
DCHECK_EQ(0, texture_id_);
surface_texture_->DetachFromGLContext();
// This will attach the surface texture to the texture currently bound to
// GL_TEXTURE_EXTERNAL_OES target.
surface_texture_->AttachToGLContext();
texture_id_ = texture_id;
}
surface_texture_->UpdateTexImage();
return true;
}
bool GLImageSurfaceTexture::CopyTexImage(unsigned target) {
return false;
}
bool GLImageSurfaceTexture::CopyTexSubImage(unsigned target,
const gfx::Point& offset,
const gfx::Rect& rect) {
return false;
}
bool GLImageSurfaceTexture::ScheduleOverlayPlane(
gfx::AcceleratedWidget widget,
int z_order,
gfx::OverlayTransform transform,
const gfx::Rect& bounds_rect,
const gfx::RectF& crop_rect) {
return false;
}
void GLImageSurfaceTexture::OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
uint64_t process_tracing_id,
const std::string& dump_name) {
// TODO(ericrk): Add OnMemoryDump for GLImages. crbug.com/514914
}
} // namespace gl
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