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 "cc/output/output_surface_client.h"
   9 #include "content/browser/compositor/browser_compositor_overlay_candidate_validator.h"
  10 #include "content/browser/compositor/buffer_queue.h"
  11 #include "content/browser/compositor/reflector_impl.h"
  12 #include "content/browser/gpu/gpu_surface_tracker.h"
  13 #include "content/common/gpu/client/context_provider_command_buffer.h"
  14 #include "content/common/gpu/client/gl_helper.h"
  15 #include "gpu/GLES2/gl2extchromium.h"
  16 #include "gpu/command_buffer/client/gles2_interface.h"
  17
  18 namespace content {
  19
  20 GpuSurfacelessBrowserCompositorOutputSurface::
  21     GpuSurfacelessBrowserCompositorOutputSurface(
  22         const scoped_refptr<ContextProviderCommandBuffer>& context,
  23         const scoped_refptr<ContextProviderCommandBuffer>& worker_context,
  24         int surface_id,
  25         const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
  26         scoped_ptr<BrowserCompositorOverlayCandidateValidator>
  27             overlay_candidate_validator,
  28         unsigned int target,
  29         unsigned int internalformat,
  30         BrowserGpuMemoryBufferManager* gpu_memory_buffer_manager)
  31     : GpuBrowserCompositorOutputSurface(context,
  32                                         worker_context,
  33                                         vsync_manager,
  34                                         overlay_candidate_validator.Pass()),
  35       internalformat_(internalformat),
  36       gpu_memory_buffer_manager_(gpu_memory_buffer_manager) {
  37   capabilities_.uses_default_gl_framebuffer = false;
  38   capabilities_.flipped_output_surface = true;
  39   // Set |max_frames_pending| to 2 for surfaceless, which aligns scheduling
  40   // more closely with the previous surfaced behavior.
  41   // With a surface, swap buffer ack used to return early, before actually
  42   // presenting the back buffer, enabling the browser compositor to run ahead.
  43   // Surfaceless implementation acks at the time of actual buffer swap, which
  44   // shifts the start of the new frame forward relative to the old
  45   // implementation.
  46   capabilities_.max_frames_pending = 2;
  47
  48   gl_helper_.reset(new GLHelper(context_provider_->ContextGL(),
  49                                 context_provider_->ContextSupport()));
  50   output_surface_.reset(new BufferQueue(
  51       context_provider_, target, internalformat_, gl_helper_.get(),
  52       gpu_memory_buffer_manager_, surface_id));
  53   output_surface_->Initialize();
  54 }
  55
  56 GpuSurfacelessBrowserCompositorOutputSurface::
  57     ~GpuSurfacelessBrowserCompositorOutputSurface() {
  58 }
  59
  60 unsigned GpuSurfacelessBrowserCompositorOutputSurface::GetOverlayTextureId()
  61     const {
  62   return output_surface_->current_texture_id();
  63 }
  64
  65 void GpuSurfacelessBrowserCompositorOutputSurface::SwapBuffers(
  66     cc::CompositorFrame* frame) {
  67   DCHECK(output_surface_);
  68
  69   GLuint texture = output_surface_->current_texture_id();
  70   output_surface_->SwapBuffers(frame->gl_frame_data->sub_buffer_rect);
  71   const gfx::Size& size = frame->gl_frame_data->size;
  72   context_provider_->ContextGL()->ScheduleOverlayPlaneCHROMIUM(
  73       0,
  74       GL_OVERLAY_TRANSFORM_NONE_CHROMIUM,
  75       texture,
  76       0,
  77       0,
  78       size.width(),
  79       size.height(),
  80       0,
  81       0,
  82       1.0f,
  83       1.0f);
  84   GpuBrowserCompositorOutputSurface::SwapBuffers(frame);
  85 }
  86
  87 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersComplete() {
  88   DCHECK(output_surface_);
  89   output_surface_->PageFlipComplete();
  90   GpuBrowserCompositorOutputSurface::OnSwapBuffersComplete();
  91 }
  92
  93 void GpuSurfacelessBrowserCompositorOutputSurface::BindFramebuffer() {
  94   DCHECK(output_surface_);
  95   output_surface_->BindFramebuffer();
  96 }
  97
  98 void GpuSurfacelessBrowserCompositorOutputSurface::Reshape(
  99     const gfx::Size& size,
 100     float scale_factor) {
 101   GpuBrowserCompositorOutputSurface::Reshape(size, scale_factor);
 102   DCHECK(output_surface_);
 103   output_surface_->Reshape(SurfaceSize(), scale_factor);
 104 }
 105
 106 void GpuSurfacelessBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
 107     const std::vector<ui::LatencyInfo>& latency_info,
 108     gfx::SwapResult result) {
 109 #if defined(OS_MACOSX)
 110   NOTREACHED();
 111 #else
 112   bool force_swap = false;
 113   if (result == gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS) {
 114     // Even through the swap failed, this is a fixable error so we can pretend
 115     // it succeeded to the rest of the system.
 116     result = gfx::SwapResult::SWAP_ACK;
 117     output_surface_->RecreateBuffers();
 118     force_swap = true;
 119   }
 120   GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(latency_info,
 121                                                             result);
 122   if (force_swap)
 123     client_->SetNeedsRedrawRect(gfx::Rect(SurfaceSize()));
 124 #endif
 125 }
 126
 127 #if defined(OS_MACOSX)
 128 void GpuSurfacelessBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
 129   OnSwapBuffersComplete();
 130 }
 131 #endif
 132
 133 }  // namespace content