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// Copyright (c) 2010 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 "webkit/plugins/ppapi/ppb_context_3d_impl.h"
#include "gpu/command_buffer/common/command_buffer.h"
#include "ppapi/c/dev/ppb_graphics_3d_dev.h"
#include "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
namespace webkit {
namespace ppapi {
namespace {
// Size of the transfer buffer.
enum { kTransferBufferSize = 512 * 1024 };
PP_Resource Create(PP_Instance instance_id,
PP_Config3D_Dev config,
PP_Resource share_context,
const int32_t* attrib_list) {
// TODO(alokp): Support shared context.
DCHECK_EQ(0, share_context);
if (share_context != 0)
return 0;
PluginInstance* instance = ResourceTracker::Get()->GetInstance(instance_id);
if (!instance)
return 0;
scoped_refptr<PPB_Context3D_Impl> context(
new PPB_Context3D_Impl(instance->module()));
if (!context->Init(instance, config, share_context, attrib_list))
return 0;
return context->GetReference();
}
PP_Bool IsContext3D(PP_Resource resource) {
return BoolToPPBool(!!Resource::GetAs<PPB_Context3D_Impl>(resource));
}
int32_t GetAttrib(PP_Resource context,
int32_t attribute,
int32_t* value) {
// TODO(alokp): Implement me.
return 0;
}
int32_t BindSurfaces(PP_Resource context,
PP_Resource draw,
PP_Resource read) {
// TODO(alokp): Implement me.
return 0;
}
int32_t GetBoundSurfaces(PP_Resource context,
PP_Resource* draw,
PP_Resource* read) {
// TODO(alokp): Implement me.
return 0;
}
int32_t SwapBuffers(PP_Resource context_id,
PP_CompletionCallback callback) {
scoped_refptr<PPB_Context3D_Impl> context(
Resource::GetAs<PPB_Context3D_Impl>(context_id));
return context->SwapBuffers();
}
const PPB_Context3D_Dev ppb_context3d = {
&Create,
&IsContext3D,
&GetAttrib,
&BindSurfaces,
&GetBoundSurfaces,
&SwapBuffers
};
} // namespace
PPB_Context3D_Impl::PPB_Context3D_Impl(PluginModule* module)
: Resource(module),
bound_instance_(NULL),
gles2_impl_(NULL) {
}
PPB_Context3D_Impl::~PPB_Context3D_Impl() {
Destroy();
}
const PPB_Context3D_Dev* PPB_Context3D_Impl::GetInterface() {
return &ppb_context3d;
}
PPB_Context3D_Impl* PPB_Context3D_Impl::AsPPB_Context3D_Impl() {
return this;
}
bool PPB_Context3D_Impl::Init(PluginInstance* instance,
PP_Config3D_Dev config,
PP_Resource share_context,
const int32_t* attrib_list) {
DCHECK(instance);
// Create and initialize the objects required to issue GLES2 calls.
platform_context_.reset(instance->delegate()->CreateContext3D());
if (!platform_context_.get()) {
Destroy();
return false;
}
if (!platform_context_->Init()) {
Destroy();
return false;
}
gles2_impl_ = platform_context_->GetGLES2Implementation();
DCHECK(gles2_impl_);
return true;
}
bool PPB_Context3D_Impl::BindToInstance(PluginInstance* new_instance) {
if (bound_instance_ == new_instance)
return true; // Rebinding the same device, nothing to do.
if (bound_instance_ && new_instance)
return false; // Can't change a bound device.
if (new_instance) {
// Resize the backing texture to the size of the instance when it is bound.
platform_context_->ResizeBackingTexture(new_instance->position().size());
// This is a temporary hack. The SwapBuffers is issued to force the resize
// to take place before any subsequent rendering. This might lead to a
// partially rendered frame being displayed. It is also not thread safe
// since the SwapBuffers is written to the command buffer and that command
// buffer might be written to by another thread.
// TODO(apatrick): Figure out the semantics of binding and resizing.
platform_context_->SwapBuffers();
}
bound_instance_ = new_instance;
return true;
}
bool PPB_Context3D_Impl::SwapBuffers() {
if (!platform_context_.get())
return false;
return platform_context_->SwapBuffers();
}
void PPB_Context3D_Impl::SetSwapBuffersCallback(Callback0::Type* callback) {
if (!platform_context_.get())
return;
platform_context_->SetSwapBuffersCallback(callback);
}
unsigned int PPB_Context3D_Impl::GetBackingTextureId() {
if (!platform_context_.get())
return 0;
return platform_context_->GetBackingTextureId();
}
void PPB_Context3D_Impl::ResizeBackingTexture(const gfx::Size& size) {
if (!platform_context_.get())
return;
platform_context_->ResizeBackingTexture(size);
}
void PPB_Context3D_Impl::Destroy() {
gles2_impl_ = NULL;
platform_context_.reset();
}
} // namespace ppapi
} // namespace webkit
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