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 "base/callback.h"
  10 #include "base/containers/scoped_ptr_hash_map.h"
  11 #include "cc/base/cc_export.h"
  12 #include "cc/output/overlay_processor.h"
  13 #include "cc/output/renderer.h"
  14 #include "cc/resources/resource_provider.h"
  15 #include "cc/resources/scoped_resource.h"
  16
  17 namespace cc {
  18
  19 class ResourceProvider;
  20
  21 // This is the base class for code shared between the GL and software
  22 // renderer implementations.  "Direct" refers to the fact that it does not
  23 // delegate rendering to another compositor.
  24 class CC_EXPORT DirectRenderer : public Renderer {
  25  public:
  26   virtual ~DirectRenderer();
  27
  28   virtual void DecideRenderPassAllocationsForFrame(
  29       const RenderPassList& render_passes_in_draw_order) OVERRIDE;
  30   virtual bool HasAllocatedResourcesForTesting(RenderPassId id) const OVERRIDE;
  31   virtual void DrawFrame(RenderPassList* render_passes_in_draw_order,
  32                          float device_scale_factor,
  33                          const gfx::Rect& device_viewport_rect,
  34                          const gfx::Rect& device_clip_rect,
  35                          bool disable_picture_quad_image_filtering) OVERRIDE;
  36
  37   struct CC_EXPORT DrawingFrame {
  38     DrawingFrame();
  39     ~DrawingFrame();
  40
  41     const RenderPassList* render_passes_in_draw_order;
  42     const RenderPass* root_render_pass;
  43     const RenderPass* current_render_pass;
  44     const ScopedResource* current_texture;
  45
  46     gfx::Rect root_damage_rect;
  47     gfx::Rect device_viewport_rect;
  48     gfx::Rect device_clip_rect;
  49
  50     gfx::Transform projection_matrix;
  51     gfx::Transform window_matrix;
  52
  53     bool disable_picture_quad_image_filtering;
  54
  55     OverlayCandidateList overlay_list;
  56   };
  57
  58   void SetEnlargePassTextureAmountForTesting(const gfx::Vector2d& amount);
  59
  60  protected:
  61   DirectRenderer(RendererClient* client,
  62                  const LayerTreeSettings* settings,
  63                  OutputSurface* output_surface,
  64                  ResourceProvider* resource_provider);
  65
  66   static gfx::RectF QuadVertexRect();
  67   static void QuadRectTransform(gfx::Transform* quad_rect_transform,
  68                                 const gfx::Transform& quad_transform,
  69                                 const gfx::RectF& quad_rect);
  70   void InitializeViewport(DrawingFrame* frame,
  71                           const gfx::Rect& draw_rect,
  72                           const gfx::Rect& viewport_rect,
  73                           const gfx::Size& surface_size);
  74   gfx::Rect MoveFromDrawToWindowSpace(const gfx::Rect& draw_rect) const;
  75
  76   bool NeedDeviceClip(const DrawingFrame* frame) const;
  77   gfx::Rect DeviceClipRectInWindowSpace(const DrawingFrame* frame) const;
  78   static gfx::Rect ComputeScissorRectForRenderPass(const DrawingFrame* frame);
  79   void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
  80   void SetScissorStateForQuadWithRenderPassScissor(
  81       const DrawingFrame* frame,
  82       const DrawQuad& quad,
  83       const gfx::Rect& render_pass_scissor,
  84       bool* should_skip_quad);
  85   void SetScissorTestRectInDrawSpace(const DrawingFrame* frame,
  86                                      const gfx::Rect& draw_space_rect);
  87
  88   static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
  89
  90   void DrawRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
  91   bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
  92
  93   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
  94   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
  95                                         const ScopedResource* resource,
  96                                         const gfx::Rect& target_rect) = 0;
  97   virtual void SetDrawViewport(const gfx::Rect& window_space_viewport) = 0;
  98   virtual void SetScissorTestRect(const gfx::Rect& scissor_rect) = 0;
  99   virtual void DiscardPixels(bool has_external_stencil_test,
 100                              bool draw_rect_covers_full_surface) = 0;
 101   virtual void ClearFramebuffer(DrawingFrame* frame,
 102                                 bool has_external_stencil_test) = 0;
 103   virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) = 0;
 104   virtual void BeginDrawingFrame(DrawingFrame* frame) = 0;
 105   virtual void FinishDrawingFrame(DrawingFrame* frame) = 0;
 106   virtual void FinishDrawingQuadList();
 107   virtual bool FlippedFramebuffer() const = 0;
 108   virtual void EnsureScissorTestEnabled() = 0;
 109   virtual void EnsureScissorTestDisabled() = 0;
 110   virtual void DiscardBackbuffer() {}
 111   virtual void EnsureBackbuffer() {}
 112
 113   virtual void CopyCurrentRenderPassToBitmap(
 114       DrawingFrame* frame,
 115       scoped_ptr<CopyOutputRequest> request) = 0;
 116
 117   base::ScopedPtrHashMap<RenderPassId, ScopedResource> render_pass_textures_;
 118   OutputSurface* output_surface_;
 119   ResourceProvider* resource_provider_;
 120   scoped_ptr<OverlayProcessor> overlay_processor_;
 121
 122   // For use in coordinate conversion, this stores the output rect, viewport
 123   // rect (= unflipped version of glViewport rect), and the size of target
 124   // framebuffer. During a draw, this stores the values for the current render
 125   // pass; in between draws, they retain the values for the root render pass of
 126   // the last draw.
 127   gfx::Rect current_draw_rect_;
 128   gfx::Rect current_viewport_rect_;
 129   gfx::Size current_surface_size_;
 130
 131  private:
 132   gfx::Vector2d enlarge_pass_texture_amount_;
 133
 134   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 135 };
 136
 137 }  // namespace cc
 138
 139 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_