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         const scoped_refptr<ContextProviderCommandBuffer>& worker_context,
  23         int surface_id,
  24         const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
  25         scoped_ptr<BrowserCompositorOverlayCandidateValidator>
  26             overlay_candidate_validator,
  27         unsigned int target,
  28         unsigned int internalformat,
  29         BrowserGpuMemoryBufferManager* gpu_memory_buffer_manager)
  30     : GpuBrowserCompositorOutputSurface(context,
  31                                         worker_context,
  32                                         vsync_manager,
  33                                         overlay_candidate_validator.Pass()),
  34       internalformat_(internalformat),
  35       gpu_memory_buffer_manager_(gpu_memory_buffer_manager) {
  36   capabilities_.uses_default_gl_framebuffer = false;
  37   capabilities_.flipped_output_surface = true;
  38   // Set |max_frames_pending| to 2 for surfaceless, which aligns scheduling
  39   // more closely with the previous surfaced behavior.
  40   // With a surface, swap buffer ack used to return early, before actually
  41   // presenting the back buffer, enabling the browser compositor to run ahead.
  42   // Surfaceless implementation acks at the time of actual buffer swap, which
  43   // shifts the start of the new frame forward relative to the old
  44   // implementation.
  45   capabilities_.max_frames_pending = 2;
  46
  47   gl_helper_.reset(new GLHelper(context_provider_->ContextGL(),
  48                                 context_provider_->ContextSupport()));
  49   output_surface_.reset(new BufferQueue(
  50       context_provider_, target, internalformat_, gl_helper_.get(),
  51       gpu_memory_buffer_manager_, surface_id));
  52   output_surface_->Initialize();
  53 }
  54
  55 GpuSurfacelessBrowserCompositorOutputSurface::
  56     ~GpuSurfacelessBrowserCompositorOutputSurface() {
  57 }
  58
  59 void GpuSurfacelessBrowserCompositorOutputSurface::SwapBuffers(
  60     cc::CompositorFrame* frame) {
  61   DCHECK(output_surface_);
  62
  63   GLuint texture = output_surface_->current_texture_id();
  64   output_surface_->SwapBuffers(frame->gl_frame_data->sub_buffer_rect);
  65   const gfx::Size& size = frame->gl_frame_data->size;
  66   context_provider_->ContextGL()->ScheduleOverlayPlaneCHROMIUM(
  67       0,
  68       GL_OVERLAY_TRANSFORM_NONE_CHROMIUM,
  69       texture,
  70       0,
  71       0,
  72       size.width(),
  73       size.height(),
  74       0,
  75       0,
  76       1.0f,
  77       1.0f);
  78   GpuBrowserCompositorOutputSurface::SwapBuffers(frame);
  79 }
  80
  81 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersComplete() {
  82   DCHECK(output_surface_);
  83   output_surface_->PageFlipComplete();
  84   GpuBrowserCompositorOutputSurface::OnSwapBuffersComplete();
  85 }
  86
  87 void GpuSurfacelessBrowserCompositorOutputSurface::BindFramebuffer() {
  88   DCHECK(output_surface_);
  89   output_surface_->BindFramebuffer();
  90 }
  91
  92 void GpuSurfacelessBrowserCompositorOutputSurface::Reshape(
  93     const gfx::Size& size,
  94     float scale_factor) {
  95   GpuBrowserCompositorOutputSurface::Reshape(size, scale_factor);
  96   DCHECK(output_surface_);
  97   output_surface_->Reshape(SurfaceSize(), scale_factor);
  98 }
  99
 100 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
 101     const std::vector<ui::LatencyInfo>& latency_info,
 102     gfx::SwapResult result) {
 103 #if defined(OS_MACOSX)
 104   NOTREACHED();
 105 #else
 106   if (result == gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS) {
 107     // Even through the swap failed, this is a fixable error so we can pretend
 108     // it succeeded to the rest of the system.
 109     result = gfx::SwapResult::SWAP_ACK;
 110     output_surface_->RecreateBuffers();
 111   }
 112   GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(latency_info,
 113                                                             result);
 114 #endif
 115 }
 116
 117 #if defined(OS_MACOSX)
 118 void GpuSurfacelessBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
 119   OnSwapBuffersComplete();
 120 }
 121 #endif
 122
 123 }  // namespace content