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