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// Copyright (c) 2012 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 "chromium_gpu_helper.h"

// Including gpu/command_buffer headers before content/gpu headers makes sure that
// guards are defined to prevent duplicate definition errors with forward declared
// GL typedefs cascading through content header includes.
#include "gpu/command_buffer/service/mailbox_manager.h"
#include "gpu/command_buffer/service/texture_manager.h"

#include "content/common/gpu/gpu_channel_manager.h"
#include "content/common/gpu/sync_point_manager.h"
#include "content/gpu/gpu_child_thread.h"

#ifdef Q_OS_QNX
#include "content/common/gpu/stream_texture_qnx.h"
#endif

static void addSyncPointCallbackDelegate(content::SyncPointManager *syncPointManager, uint32 sync_point, const base::Closure& callback)
{
    syncPointManager->AddSyncPointCallback(sync_point, callback);
}

QMap<uint32, gfx::TransferableFence> transferFences()
{
    QMap<uint32, gfx::TransferableFence> ret;
    content::GpuChannelManager *gpuChannelManager = content::GpuChildThread::instance()->ChannelManager();
    content::GpuChannelManager::SyncPointGLFences::iterator it = gpuChannelManager->sync_point_gl_fences_.begin();
    content::GpuChannelManager::SyncPointGLFences::iterator end = gpuChannelManager->sync_point_gl_fences_.end();
    for (; it != end; ++it) {
        ret[it->first] = it->second->Transfer();
        delete it->second;
    }
    gpuChannelManager->sync_point_gl_fences_.clear();
    return ret;
}

base::MessageLoop *gpu_message_loop()
{
    return content::GpuChildThread::instance()->message_loop();
}

content::SyncPointManager *sync_point_manager()
{
    content::GpuChannelManager *gpuChannelManager = content::GpuChildThread::instance()->ChannelManager();
    return gpuChannelManager->sync_point_manager();
}

void AddSyncPointCallbackOnGpuThread(base::MessageLoop *gpuMessageLoop, content::SyncPointManager *syncPointManager, uint32 sync_point, const base::Closure& callback)
{
    // We need to set our callback from the GPU thread, where the SyncPointManager lives.
    gpuMessageLoop->PostTask(FROM_HERE, base::Bind(&addSyncPointCallbackDelegate, make_scoped_refptr(syncPointManager), sync_point, callback));
}

gpu::gles2::MailboxManager *mailbox_manager()
{
    content::GpuChannelManager *gpuChannelManager = content::GpuChildThread::instance()->ChannelManager();
    return gpuChannelManager->mailbox_manager();
}

gpu::gles2::Texture* ConsumeTexture(gpu::gles2::MailboxManager *mailboxManager, unsigned target, const gpu::Mailbox& mailbox)
{
    Q_UNUSED(target);
    return mailboxManager->ConsumeTexture(mailbox);
}

unsigned int service_id(gpu::gles2::Texture *tex)
{
    return tex->service_id();
}

#ifdef Q_OS_QNX
EGLStreamData eglstream_connect_consumer(gpu::gles2::Texture *tex)
{
    EGLStreamData egl_stream;
    content::StreamTexture* image = static_cast<content::StreamTexture *>(tex->GetLevelImage(GL_TEXTURE_EXTERNAL_OES, 0));
    if (image) {
        image->ConnectConsumerIfNeeded(&egl_stream.egl_display, &egl_stream.egl_str_handle);
    }
    return egl_stream;
}
#endif