content/common/gpu/image_transport_surface_mac.mm

   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/common/gpu/image_transport_surface.h"
   6
   7 #include "content/common/gpu/gpu_messages.h"
   8 #include "ui/gfx/native_widget_types.h"
   9 #include "ui/gl/gl_context.h"
  10 #include "ui/gl/gl_implementation.h"
  11 #include "ui/gl/gl_surface_osmesa.h"
  12
  13 namespace content {
  14
  15 scoped_refptr<gfx::GLSurface> ImageTransportSurfaceCreateNativeSurface(
  16     GpuChannelManager* manager,
  17     GpuCommandBufferStub* stub,
  18     gfx::PluginWindowHandle handle);
  19
  20 namespace {
  21
  22 // A subclass of GLSurfaceOSMesa that doesn't print an error message when
  23 // SwapBuffers() is called.
  24 class DRTSurfaceOSMesa : public gfx::GLSurfaceOSMesa {
  25  public:
  26   // Size doesn't matter, the surface is resized to the right size later.
  27   DRTSurfaceOSMesa()
  28       : GLSurfaceOSMesa(gfx::OSMesaSurfaceFormatRGBA, gfx::Size(1, 1)) {}
  29
  30   // Implement a subset of GLSurface.
  31   gfx::SwapResult SwapBuffers() override;
  32
  33  private:
  34   ~DRTSurfaceOSMesa() override {}
  35   DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa);
  36 };
  37
  38 gfx::SwapResult DRTSurfaceOSMesa::SwapBuffers() {
  39   return gfx::SwapResult::SWAP_ACK;
  40 }
  41
  42 bool g_allow_os_mesa = false;
  43
  44 }  //  namespace
  45
  46 // static
  47 scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface(
  48     GpuChannelManager* manager,
  49     GpuCommandBufferStub* stub,
  50     const gfx::GLSurfaceHandle& surface_handle) {
  51   DCHECK(surface_handle.transport_type == gfx::NATIVE_DIRECT ||
  52          surface_handle.transport_type == gfx::NULL_TRANSPORT);
  53
  54   switch (gfx::GetGLImplementation()) {
  55     case gfx::kGLImplementationDesktopGL:
  56     case gfx::kGLImplementationDesktopGLCoreProfile:
  57     case gfx::kGLImplementationAppleGL:
  58       return ImageTransportSurfaceCreateNativeSurface(manager, stub,
  59                                                       surface_handle.handle);
  60     default:
  61       // Content shell in DRT mode spins up a gpu process which needs an
  62       // image transport surface, but that surface isn't used to read pixel
  63       // baselines. So this is mostly a dummy surface.
  64       if (!g_allow_os_mesa) {
  65         NOTREACHED();
  66         return scoped_refptr<gfx::GLSurface>();
  67       }
  68       scoped_refptr<gfx::GLSurface> surface(new DRTSurfaceOSMesa());
  69       if (!surface.get() || !surface->Initialize())
  70         return surface;
  71       return scoped_refptr<gfx::GLSurface>(new PassThroughImageTransportSurface(
  72           manager, stub, surface.get()));
  73   }
  74 }
  75
  76 // static
  77 void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
  78   g_allow_os_mesa = allow;
  79 }
  80
  81 }  // namespace content