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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_VR_GRAPHICS_DELEGATE_H_
#define CHROME_BROWSER_VR_GRAPHICS_DELEGATE_H_
#include "base/functional/callback_forward.h"
#include "chrome/browser/vr/fov_rectangle.h"
#include "chrome/browser/vr/frame_type.h"
#include "chrome/browser/vr/render_info.h"
#include "chrome/browser/vr/vr_export.h"
#include "device/vr/public/mojom/vr_service.mojom.h"
#include "ui/gfx/gpu_memory_buffer_handle.h"
namespace gfx {
class Transform;
class RectF;
class Size;
} // namespace gfx
namespace gpu {
struct SyncToken;
} // namespace gpu
namespace vr {
// The GraphicsDelegate manages surfaces, buffers and viewports, preparing
// them for drawing browser UI. It provides projection and view matrices for the
// viewports.
class VR_EXPORT GraphicsDelegate {
public:
static std::unique_ptr<GraphicsDelegate> Create();
using Transform = float[16];
GraphicsDelegate();
virtual ~GraphicsDelegate();
float GetZNear();
void SetXrViews(const std::vector<device::mojom::XRViewPtr>& views);
gfx::RectF GetRight();
gfx::RectF GetLeft();
FovRectangles GetRecommendedFovs();
RenderInfo GetRenderInfo(FrameType frame_type,
const gfx::Transform& head_pose);
RenderInfo GetOptimizedRenderInfoForFovs(const FovRectangles& fovs);
virtual void Initialize(base::OnceClosure on_initialized) = 0;
virtual bool PreRender() = 0;
virtual void PostRender() = 0;
virtual gfx::GpuMemoryBufferHandle GetTexture() = 0;
virtual gpu::SyncToken GetSyncToken() = 0;
virtual void ResetMemoryBuffer() = 0;
virtual bool BindContext() = 0;
virtual void ClearContext() = 0;
protected:
gfx::Size GetTextureSize();
virtual void ClearBufferToBlack() = 0;
private:
device::mojom::XRViewPtr left_;
device::mojom::XRViewPtr right_;
RenderInfo cached_info_ = {};
};
} // namespace vr
#endif // CHROME_BROWSER_VR_GRAPHICS_DELEGATE_H_
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