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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 "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
#include "webkit/plugins/ppapi/ppb_surface_3d_impl.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));
if (!context->Init(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_id,
PP_Resource draw,
PP_Resource read) {
scoped_refptr<PPB_Context3D_Impl> context(
Resource::GetAs<PPB_Context3D_Impl>(context_id));
if (!context.get())
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_Surface3D_Impl> draw_surface(
Resource::GetAs<PPB_Surface3D_Impl>(draw));
if (!draw_surface.get())
return PP_ERROR_BADRESOURCE;
scoped_refptr<PPB_Surface3D_Impl> read_surface(
Resource::GetAs<PPB_Surface3D_Impl>(read));
if (!read_surface.get())
return PP_ERROR_BADRESOURCE;
return context->BindSurfaces(draw_surface.get(), read_surface.get());
}
int32_t GetBoundSurfaces(PP_Resource context,
PP_Resource* draw,
PP_Resource* read) {
// TODO(alokp): Implement me.
return 0;
}
const PPB_Context3D_Dev ppb_context3d = {
&Create,
&IsContext3D,
&GetAttrib,
&BindSurfaces,
&GetBoundSurfaces,
};
} // namespace
PPB_Context3D_Impl::PPB_Context3D_Impl(PluginInstance* instance)
: Resource(instance->module()),
instance_(instance),
gles2_impl_(NULL),
draw_surface_(NULL),
read_surface_(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(PP_Config3D_Dev config,
PP_Resource share_context,
const int32_t* attrib_list) {
// Create and initialize the objects required to issue GLES2 calls.
platform_context_.reset(instance()->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;
}
int32_t PPB_Context3D_Impl::BindSurfaces(PPB_Surface3D_Impl* draw,
PPB_Surface3D_Impl* read) {
// TODO(alokp): Support separate draw-read surfaces.
DCHECK_EQ(draw, read);
if (draw != read)
return PP_GRAPHICS3DERROR_BAD_MATCH;
if (draw == draw_surface_)
return PP_OK;
if (draw && draw->context())
return PP_GRAPHICS3DERROR_BAD_ACCESS;
if (draw_surface_)
draw_surface_->BindToContext(NULL);
if (draw && !draw->BindToContext(platform_context_.get()))
return PP_ERROR_NOMEMORY;
draw_surface_ = draw;
read_surface_ = read;
return PP_OK;
}
void PPB_Context3D_Impl::Destroy() {
if (draw_surface_)
draw_surface_->BindToContext(NULL);
gles2_impl_ = NULL;
platform_context_.reset();
}
} // namespace ppapi
} // namespace webkit
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