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// Copyright 2016 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_UI_ELEMENT_RENDERER_H_
#define CHROME_BROWSER_VR_UI_ELEMENT_RENDERER_H_
#include <memory>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "chrome/browser/vr/elements/corner_radii.h"
#include "chrome/browser/vr/macros.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/size_f.h"
#include "ui/gfx/geometry/transform.h"
namespace gfx {
class RectF;
class SizeF;
class Transform;
} // namespace gfx
namespace vr {
class BaseRenderer;
class GridRenderer;
class RadialGradientQuadRenderer;
class TexturedQuadRenderer;
// An instance of this class is passed to UiElements by the UiRenderer in order
// to issue the GL commands for drawing the frame. In some ways, this class is a
// bit of unnecessary abstraction, but by having all the renderers owned by a
// single class, we gain several benefits. For one, we know when the shader
// programs are being changed and this lets us do batching (see the textured
// quad renderer). It also is a central point of contact that can let all
// renderers know to recreate their state in the event of a GL context
// loss/recreation.
class UiElementRenderer {
public:
UiElementRenderer();
UiElementRenderer(const UiElementRenderer&) = delete;
UiElementRenderer& operator=(const UiElementRenderer&) = delete;
VIRTUAL_FOR_MOCKS ~UiElementRenderer();
VIRTUAL_FOR_MOCKS void DrawTexturedQuad(
int texture_data_handle,
int overlay_texture_data_handle,
const gfx::Transform& model_view_proj_matrix,
const gfx::RectF& clip_rect,
float opacity,
const gfx::SizeF& element_size,
float corner_radius,
bool blend);
VIRTUAL_FOR_MOCKS void DrawRadialGradientQuad(
const gfx::Transform& model_view_proj_matrix,
const SkColor edge_color,
const SkColor center_color,
const gfx::RectF& clip_rect,
float opacity,
const gfx::SizeF& element_size,
const CornerRadii& radii);
VIRTUAL_FOR_MOCKS void DrawGradientGridQuad(
const gfx::Transform& model_view_proj_matrix,
const SkColor grid_color,
int gridline_count,
float opacity);
void Flush();
protected:
explicit UiElementRenderer(bool use_gl);
private:
void Init();
void FlushIfNecessary(BaseRenderer* renderer);
raw_ptr<BaseRenderer> last_renderer_ = nullptr;
std::unique_ptr<TexturedQuadRenderer> textured_quad_renderer_;
std::unique_ptr<RadialGradientQuadRenderer> radial_gradient_quad_renderer_;
std::unique_ptr<GridRenderer> gradient_grid_renderer_;
};
} // namespace vr
#endif // CHROME_BROWSER_VR_UI_ELEMENT_RENDERER_H_
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