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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/modules/webgl/webgl_object.h"
#include <limits>
#include "third_party/blink/renderer/modules/webgl/webgl_context_object_support.h"
namespace blink {
WebGLObject::WebGLObject(WebGLContextObjectSupport* context)
: context_(context),
cached_number_of_context_losses_(std::numeric_limits<uint32_t>::max()) {
if (context_) {
cached_number_of_context_losses_ = context->NumberOfContextLosses();
}
}
WebGLObject::~WebGLObject() = default;
bool WebGLObject::Validate(const WebGLContextObjectSupport* context) const {
// The contexts and context groups no longer maintain references to all
// the objects they ever created, so there's no way to invalidate them
// eagerly during context loss. The invalidation is discovered lazily.
return (context == context_ && context_ != nullptr &&
cached_number_of_context_losses_ == context->NumberOfContextLosses());
}
void WebGLObject::SetObject(GLuint object) {
// SetObject may only be called when this container is in the
// uninitialized state: object==0 && marked_for_deletion==false.
DCHECK(!object_);
DCHECK(!MarkedForDeletion());
object_ = object;
}
void WebGLObject::ResetUnownedObject() {
DCHECK(object_);
object_ = 0;
}
void WebGLObject::DeleteObject(gpu::gles2::GLES2Interface* gl) {
marked_for_deletion_ = true;
if (!HasObject())
return;
if (!context_) {
return;
}
if (context_->NumberOfContextLosses() != cached_number_of_context_losses_) {
// This object has been invalidated.
return;
}
if (!attachment_count_) {
if (!gl)
gl = context_->ContextGL();
if (gl) {
DeleteObjectImpl(gl);
object_ = 0;
}
}
}
void WebGLObject::Detach() {
attachment_count_ = 0; // Make sure OpenGL resource is eventually deleted.
}
void WebGLObject::DetachAndDeleteObject() {
// To ensure that all platform objects are deleted after being detached,
// this method does them together.
Detach();
DeleteObject(nullptr);
}
void WebGLObject::Dispose() {
DCHECK(!destruction_in_progress_);
// This boilerplate pre-finalizer is sufficient for all subclasses, as long
// as they implement DeleteObjectImpl properly, and don't try to touch
// other objects on the Oilpan heap if the destructor's been entered.
destruction_in_progress_ = true;
DetachAndDeleteObject();
}
bool WebGLObject::DestructionInProgress() const {
return destruction_in_progress_;
}
void WebGLObject::OnDetached(gpu::gles2::GLES2Interface* gl) {
if (attachment_count_)
--attachment_count_;
if (marked_for_deletion_)
DeleteObject(gl);
}
void WebGLObject::Trace(Visitor* visitor) const {
visitor->Trace(context_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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