blob: 1302cfe51bc1d39cefc82bc7dc69038b246349f3 [file] [log] [blame]
// Copyright 2014 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 "base/mac/scoped_cftyperef.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/gpu/gpu_command_buffer_stub.h"
#include "content/common/gpu/image_transport_surface.h"
#include "ui/gl/gl_bindings.h"
namespace content {
// We are backed by an offscreen surface for the purposes of creating
// a context, but use FBOs to render to texture. The texture may be backed by
// an IOSurface, or it may be presented to the screen via a CALayer, depending
// on the StorageProvider class specified.
class ImageTransportSurfaceFBO
: public gfx::GLSurface,
public ImageTransportSurface,
public GpuCommandBufferStub::DestructionObserver {
// The interface through which storage for the color buffer of the FBO is
// allocated.
class StorageProvider {
virtual ~StorageProvider() {}
// IOSurfaces cause too much address space fragmentation if they are
// allocated on every resize. This gets a rounded size for allocation.
virtual gfx::Size GetRoundedSize(gfx::Size size) = 0;
// Allocate the storage for the color buffer. The specified context is
// current, and there is a texture bound to GL_TEXTURE_RECTANGLE_ARB.
virtual bool AllocateColorBufferStorage(
CGLContextObj context, gfx::Size size) = 0;
// Free the storage allocated in the AllocateColorBufferStorage call. The
// GL texture that was bound has already been deleted by the caller.
virtual void FreeColorBufferStorage() = 0;
// Retrieve the handle for the surface to send to the browser process to
// display.
virtual uint64 GetSurfaceHandle() const = 0;
ImageTransportSurfaceFBO(StorageProvider* storage_provider,
GpuChannelManager* manager,
GpuCommandBufferStub* stub,
gfx::PluginWindowHandle handle);
// GLSurface implementation
virtual bool Initialize() OVERRIDE;
virtual void Destroy() OVERRIDE;
virtual bool DeferDraws() OVERRIDE;
virtual bool IsOffscreen() OVERRIDE;
virtual bool SwapBuffers() OVERRIDE;
virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
virtual bool SupportsPostSubBuffer() OVERRIDE;
virtual gfx::Size GetSize() OVERRIDE;
virtual void* GetHandle() OVERRIDE;
virtual void* GetDisplay() OVERRIDE;
virtual bool OnMakeCurrent(gfx::GLContext* context) OVERRIDE;
virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
virtual bool SetBackbufferAllocation(bool allocated) OVERRIDE;
virtual void SetFrontbufferAllocation(bool allocated) OVERRIDE;
// ImageTransportSurface implementation
virtual void OnBufferPresented(
const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
virtual void OnResize(gfx::Size size, float scale_factor) OVERRIDE;
virtual void SetLatencyInfo(
const std::vector<ui::LatencyInfo>&) OVERRIDE;
virtual void WakeUpGpu() OVERRIDE;
// GpuCommandBufferStub::DestructionObserver implementation.
virtual void OnWillDestroyStub() OVERRIDE;
virtual ~ImageTransportSurfaceFBO() OVERRIDE;
void AdjustBufferAllocation();
void DestroyFramebuffer();
void CreateFramebuffer();
scoped_ptr<StorageProvider> storage_provider_;
// Tracks the current buffer allocation state.
bool backbuffer_suggested_allocation_;
bool frontbuffer_suggested_allocation_;
uint32 fbo_id_;
GLuint texture_id_;
GLuint depth_stencil_renderbuffer_id_;
bool has_complete_framebuffer_;
// Weak pointer to the context that this was last made current to.
gfx::GLContext* context_;
gfx::Size size_;
gfx::Size rounded_size_;
float scale_factor_;
// Whether or not we've successfully made the surface current once.
bool made_current_;
// Whether a SwapBuffers is pending.
bool is_swap_buffers_pending_;
// Whether we unscheduled command buffer because of pending SwapBuffers.
bool did_unschedule_;
std::vector<ui::LatencyInfo> latency_info_;
scoped_ptr<ImageTransportHelper> helper_;
} // namespace content