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// 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 "gpu/ipc/service/image_transport_surface.h"
#include "base/macros.h"
#include "gpu/ipc/service/image_transport_surface_overlay_mac.h"
#include "gpu/ipc/service/pass_through_image_transport_surface.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gl/gl_surface_osmesa.h"
#include "ui/gl/gl_surface_stub.h"
namespace gpu {
namespace {
// A subclass of GLSurfaceOSMesa that doesn't print an error message when
// SwapBuffers() is called.
class DRTSurfaceOSMesa : public gl::GLSurfaceOSMesa {
public:
// Size doesn't matter, the surface is resized to the right size later.
DRTSurfaceOSMesa()
: GLSurfaceOSMesa(
gl::GLSurfaceFormat(gl::GLSurfaceFormat::PIXEL_LAYOUT_RGBA),
gfx::Size(1, 1)) {}
// Implement a subset of GLSurface.
gfx::SwapResult SwapBuffers() override;
private:
~DRTSurfaceOSMesa() override {}
DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa);
};
gfx::SwapResult DRTSurfaceOSMesa::SwapBuffers() {
return gfx::SwapResult::SWAP_ACK;
}
bool g_allow_os_mesa = false;
} // namespace
// static
scoped_refptr<gl::GLSurface> ImageTransportSurface::CreateNativeSurface(
base::WeakPtr<ImageTransportSurfaceDelegate> delegate,
SurfaceHandle surface_handle,
gl::GLSurfaceFormat format) {
DCHECK_NE(surface_handle, kNullSurfaceHandle);
switch (gl::GetGLImplementation()) {
case gl::kGLImplementationDesktopGL:
case gl::kGLImplementationDesktopGLCoreProfile:
case gl::kGLImplementationAppleGL:
return make_scoped_refptr<gl::GLSurface>(
new ImageTransportSurfaceOverlayMac(delegate));
case gl::kGLImplementationMockGL:
return make_scoped_refptr<gl::GLSurface>(new gl::GLSurfaceStub);
default:
// Content shell in DRT mode spins up a gpu process which needs an
// image transport surface, but that surface isn't used to read pixel
// baselines. So this is mostly a dummy surface.
if (!g_allow_os_mesa) {
NOTREACHED();
return nullptr;
}
scoped_refptr<gl::GLSurface> surface(new DRTSurfaceOSMesa());
if (!surface.get() || !surface->Initialize(format))
return surface;
return make_scoped_refptr<gl::GLSurface>(
new PassThroughImageTransportSurface(delegate, surface.get()));
}
}
// static
void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
g_allow_os_mesa = allow;
}
} // namespace gpu
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