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