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// Copyright 2012 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.
#ifndef CC_OUTPUT_DIRECT_RENDERER_H_
#define CC_OUTPUT_DIRECT_RENDERER_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/containers/scoped_ptr_hash_map.h"
#include "cc/base/cc_export.h"
#include "cc/output/renderer.h"
#include "cc/resources/resource_provider.h"
#include "cc/resources/scoped_resource.h"
namespace cc {
class ResourceProvider;
// This is the base class for code shared between the GL and software
// renderer implementations. "Direct" refers to the fact that it does not
// delegate rendering to another compositor.
class CC_EXPORT DirectRenderer : public Renderer {
public:
virtual ~DirectRenderer();
ResourceProvider* resource_provider() const { return resource_provider_; }
virtual bool CanReadPixels() const OVERRIDE;
virtual void DecideRenderPassAllocationsForFrame(
const RenderPassList& render_passes_in_draw_order) OVERRIDE;
virtual bool HasAllocatedResourcesForTesting(RenderPass::Id id) const
OVERRIDE;
virtual void DrawFrame(RenderPassList* render_passes_in_draw_order,
ContextProvider* offscreen_context_provider,
float device_scale_factor,
bool allow_partial_swap,
bool disable_picture_quad_image_filtering) OVERRIDE;
struct CC_EXPORT DrawingFrame {
DrawingFrame();
~DrawingFrame();
const RenderPass* root_render_pass;
const RenderPass* current_render_pass;
const ScopedResource* current_texture;
gfx::RectF root_damage_rect;
gfx::Transform projection_matrix;
gfx::Transform window_matrix;
ContextProvider* offscreen_context_provider;
bool disable_picture_quad_image_filtering;
};
void SetEnlargePassTextureAmountForTesting(gfx::Vector2d amount);
protected:
DirectRenderer(RendererClient* client,
const LayerTreeSettings* settings,
OutputSurface* output_surface,
ResourceProvider* resource_provider);
static gfx::RectF QuadVertexRect();
static void QuadRectTransform(gfx::Transform* quad_rect_transform,
const gfx::Transform& quad_transform,
const gfx::RectF& quad_rect);
void InitializeViewport(DrawingFrame* frame,
gfx::Rect draw_rect,
gfx::Rect viewport_rect,
gfx::Size surface_size);
gfx::Rect MoveFromDrawToWindowSpace(const gfx::RectF& draw_rect) const;
bool NeedDeviceClip(const DrawingFrame* frame) const;
gfx::Rect DeviceClipRect(const DrawingFrame* frame) const;
static gfx::RectF ComputeScissorRectForRenderPass(const DrawingFrame* frame);
void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
void SetScissorStateForQuadWithRenderPassScissor(
const DrawingFrame* frame,
const DrawQuad& quad,
const gfx::RectF& render_pass_scissor,
bool* should_skip_quad);
void SetScissorTestRectInDrawSpace(const DrawingFrame* frame,
gfx::RectF draw_space_rect);
static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
static ResourceFormat RenderPassTextureFormat(const RenderPass* render_pass);
void DrawRenderPass(DrawingFrame* frame,
const RenderPass* render_pass,
bool allow_partial_swap);
bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
virtual bool BindFramebufferToTexture(DrawingFrame* frame,
const ScopedResource* resource,
gfx::Rect target_rect) = 0;
virtual void SetDrawViewport(gfx::Rect window_space_viewport) = 0;
virtual void SetScissorTestRect(gfx::Rect scissor_rect) = 0;
virtual void DiscardPixels(bool has_external_stencil_test,
bool draw_rect_covers_full_surface) = 0;
virtual void ClearFramebuffer(DrawingFrame* frame,
bool has_external_stencil_test) = 0;
virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) = 0;
virtual void BeginDrawingFrame(DrawingFrame* frame) = 0;
virtual void FinishDrawingFrame(DrawingFrame* frame) = 0;
virtual void FinishDrawingQuadList();
virtual bool FlippedFramebuffer() const = 0;
virtual void EnsureScissorTestEnabled() = 0;
virtual void EnsureScissorTestDisabled() = 0;
virtual void DiscardBackbuffer() {}
virtual void EnsureBackbuffer() {}
virtual void CopyCurrentRenderPassToBitmap(
DrawingFrame* frame,
scoped_ptr<CopyOutputRequest> request) = 0;
base::ScopedPtrHashMap<RenderPass::Id, ScopedResource> render_pass_textures_;
OutputSurface* output_surface_;
ResourceProvider* resource_provider_;
// For use in coordinate conversion, this stores the output rect, viewport
// rect (= unflipped version of glViewport rect), and the size of target
// framebuffer. During a draw, this stores the values for the current render
// pass; in between draws, they retain the values for the root render pass of
// the last draw.
gfx::Rect current_draw_rect_;
gfx::Rect current_viewport_rect_;
gfx::Size current_surface_size_;
private:
gfx::Vector2d enlarge_pass_texture_amount_;
DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
};
} // namespace cc
#endif // CC_OUTPUT_DIRECT_RENDERER_H_
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