cc/output/direct_renderer.h

   1 // Copyright 2012 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 #ifndef CC_OUTPUT_DIRECT_RENDERER_H_
   6 #define CC_OUTPUT_DIRECT_RENDERER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/output/renderer.h"
  11 #include "cc/resources/resource_provider.h"
  12 #include "cc/resources/scoped_resource.h"
  13
  14 namespace cc {
  15
  16 class ResourceProvider;
  17
  18 // This is the base class for code shared between the GL and software
  19 // renderer implementations.  "Direct" refers to the fact that it does not
  20 // delegate rendering to another compositor.
  21 class CC_EXPORT DirectRenderer : public Renderer {
  22  public:
  23   virtual ~DirectRenderer();
  24
  25   ResourceProvider* resource_provider() const { return resource_provider_; }
  26
  27   virtual void DecideRenderPassAllocationsForFrame(
  28       const RenderPassList& render_passes_in_draw_order) OVERRIDE;
  29   virtual bool HaveCachedResourcesForRenderPassId(RenderPass::Id id) const
  30       OVERRIDE;
  31   virtual void DrawFrame(RenderPassList* render_passes_in_draw_order) OVERRIDE;
  32
  33   struct CC_EXPORT DrawingFrame {
  34     DrawingFrame();
  35     ~DrawingFrame();
  36
  37     const RenderPass* root_render_pass;
  38     const RenderPass* current_render_pass;
  39     const ScopedResource* current_texture;
  40
  41     gfx::RectF root_damage_rect;
  42
  43     gfx::Transform projection_matrix;
  44     gfx::Transform window_matrix;
  45     bool flipped_y;
  46   };
  47
  48   void SetEnlargePassTextureAmountForTesting(gfx::Vector2d amount);
  49
  50  protected:
  51   DirectRenderer(RendererClient* client, ResourceProvider* resource_provider);
  52
  53   class CachedResource : public ScopedResource {
  54    public:
  55     static scoped_ptr<CachedResource> Create(
  56         ResourceProvider* resource_provider) {
  57       return make_scoped_ptr(new CachedResource(resource_provider));
  58     }
  59     virtual ~CachedResource() {}
  60
  61     bool is_complete() const { return is_complete_; }
  62     void set_is_complete(bool is_complete) { is_complete_ = is_complete; }
  63
  64    protected:
  65     explicit CachedResource(ResourceProvider* resource_provider)
  66         : ScopedResource(resource_provider),
  67           is_complete_(false) {}
  68
  69    private:
  70     bool is_complete_;
  71
  72     DISALLOW_COPY_AND_ASSIGN(CachedResource);
  73   };
  74
  75   static gfx::RectF QuadVertexRect();
  76   static void QuadRectTransform(gfx::Transform* quad_rect_transform,
  77                                 const gfx::Transform& quad_transform,
  78                                 const gfx::RectF& quad_rect);
  79   static void InitializeMatrices(DrawingFrame* frame,
  80                                  gfx::Rect draw_rect,
  81                                  bool flip_y);
  82   static gfx::Rect MoveScissorToWindowSpace(const DrawingFrame* frame,
  83                                             const gfx::RectF& scissor_rect);
  84   static gfx::RectF ComputeScissorRectForRenderPass(const DrawingFrame* frame);
  85   void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
  86   void SetScissorStateForQuadWithRenderPassScissor(
  87       const DrawingFrame* frame,
  88       const DrawQuad& quad,
  89       const gfx::RectF& render_pass_scissor,
  90       bool* should_skip_quad);
  91
  92   static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
  93   static GLenum RenderPassTextureFormat(const RenderPass* render_pass);
  94
  95   void DrawRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
  96   bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
  97
  98   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
  99   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
 100                                         const ScopedResource* resource,
 101                                         gfx::Rect framebuffer_rect) = 0;
 102   virtual void SetDrawViewportSize(gfx::Size viewport_size) = 0;
 103   virtual void SetScissorTestRect(gfx::Rect scissor_rect) = 0;
 104   virtual void ClearFramebuffer(DrawingFrame* frame) = 0;
 105   virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) = 0;
 106   virtual void BeginDrawingFrame(DrawingFrame* frame) = 0;
 107   virtual void FinishDrawingFrame(DrawingFrame* frame) = 0;
 108   virtual void FinishDrawingQuadList();
 109   virtual bool FlippedFramebuffer() const = 0;
 110   virtual void EnsureScissorTestEnabled() = 0;
 111   virtual void EnsureScissorTestDisabled() = 0;
 112   virtual void CopyCurrentRenderPassToBitmap(DrawingFrame* frame,
 113                                              SkBitmap* bitmap) = 0;
 114
 115   ScopedPtrHashMap<RenderPass::Id, CachedResource> render_pass_textures_;
 116   ResourceProvider* resource_provider_;
 117
 118  private:
 119   gfx::Vector2d enlarge_pass_texture_amount_;
 120
 121   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 122 };
 123
 124 }  // namespace cc
 125
 126 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_