content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.h"
   6
   7 #include "cc/output/compositor_frame.h"
   8 #include "content/browser/compositor/browser_compositor_overlay_candidate_validator.h"
   9 #include "content/browser/compositor/buffer_queue.h"
  10 #include "content/browser/compositor/reflector_impl.h"
  11 #include "content/browser/gpu/gpu_surface_tracker.h"
  12 #include "content/common/gpu/client/context_provider_command_buffer.h"
  13 #include "content/common/gpu/client/gl_helper.h"
  14 #include "gpu/GLES2/gl2extchromium.h"
  15 #include "gpu/command_buffer/client/gles2_interface.h"
  16
  17 namespace content {
  18
  19 GpuSurfacelessBrowserCompositorOutputSurface::
  20     GpuSurfacelessBrowserCompositorOutputSurface(
  21         const scoped_refptr<ContextProviderCommandBuffer>& context,
  22         int surface_id,
  23         const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
  24         scoped_ptr<BrowserCompositorOverlayCandidateValidator>
  25             overlay_candidate_validator,
  26         unsigned int target,
  27         unsigned int internalformat,
  28         BrowserGpuMemoryBufferManager* gpu_memory_buffer_manager)
  29     : GpuBrowserCompositorOutputSurface(context,
  30                                         vsync_manager,
  31                                         overlay_candidate_validator.Pass()),
  32       internalformat_(internalformat),
  33       gpu_memory_buffer_manager_(gpu_memory_buffer_manager) {
  34   capabilities_.uses_default_gl_framebuffer = false;
  35   capabilities_.flipped_output_surface = true;
  36   // Set |max_frames_pending| to 2 for surfaceless, which aligns scheduling
  37   // more closely with the previous surfaced behavior.
  38   // With a surface, swap buffer ack used to return early, before actually
  39   // presenting the back buffer, enabling the browser compositor to run ahead.
  40   // Surfaceless implementation acks at the time of actual buffer swap, which
  41   // shifts the start of the new frame forward relative to the old
  42   // implementation.
  43   capabilities_.max_frames_pending = 2;
  44
  45   gl_helper_.reset(new GLHelper(context_provider_->ContextGL(),
  46                                 context_provider_->ContextSupport()));
  47   output_surface_.reset(new BufferQueue(
  48       context_provider_, target, internalformat_, gl_helper_.get(),
  49       gpu_memory_buffer_manager_, surface_id));
  50   output_surface_->Initialize();
  51 }
  52
  53 GpuSurfacelessBrowserCompositorOutputSurface::
  54     ~GpuSurfacelessBrowserCompositorOutputSurface() {
  55 }
  56
  57 void GpuSurfacelessBrowserCompositorOutputSurface::SwapBuffers(
  58     cc::CompositorFrame* frame) {
  59   DCHECK(output_surface_);
  60
  61   GLuint texture = output_surface_->current_texture_id();
  62   output_surface_->SwapBuffers(frame->gl_frame_data->sub_buffer_rect);
  63   const gfx::Size& size = frame->gl_frame_data->size;
  64   context_provider_->ContextGL()->ScheduleOverlayPlaneCHROMIUM(
  65       0,
  66       GL_OVERLAY_TRANSFORM_NONE_CHROMIUM,
  67       texture,
  68       0,
  69       0,
  70       size.width(),
  71       size.height(),
  72       0,
  73       0,
  74       1.0f,
  75       1.0f);
  76   GpuBrowserCompositorOutputSurface::SwapBuffers(frame);
  77 }
  78
  79 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersComplete() {
  80   DCHECK(output_surface_);
  81   output_surface_->PageFlipComplete();
  82   GpuBrowserCompositorOutputSurface::OnSwapBuffersComplete();
  83 }
  84
  85 void GpuSurfacelessBrowserCompositorOutputSurface::BindFramebuffer() {
  86   DCHECK(output_surface_);
  87   output_surface_->BindFramebuffer();
  88 }
  89
  90 void GpuSurfacelessBrowserCompositorOutputSurface::Reshape(
  91     const gfx::Size& size,
  92     float scale_factor) {
  93   GpuBrowserCompositorOutputSurface::Reshape(size, scale_factor);
  94   DCHECK(output_surface_);
  95   output_surface_->Reshape(SurfaceSize(), scale_factor);
  96 }
  97
  98 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
  99     const std::vector<ui::LatencyInfo>& latency_info,
 100     gfx::SwapResult result) {
 101   if (result == gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS) {
 102     // Even through the swap failed, this is a fixable error so we can pretend
 103     // it succeeded to the rest of the system.
 104     result = gfx::SwapResult::SWAP_ACK;
 105     output_surface_->RecreateBuffers();
 106   }
 107   GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(latency_info,
 108                                                             result);
 109 }
 110
 111 #if defined(OS_MACOSX)
 112 void GpuSurfacelessBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
 113   OnSwapBuffersComplete();
 114 }
 115 #endif
 116
 117 }  // namespace content