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/base/scoped_ptr_deque.h"
  13 #include "cc/output/overlay_processor.h"
  14 #include "cc/output/renderer.h"
  15 #include "cc/resources/resource_provider.h"
  16 #include "cc/resources/scoped_resource.h"
  17 #include "cc/resources/task_graph_runner.h"
  18 #include "ui/gfx/geometry/quad_f.h"
  19
  20 namespace cc {
  21
  22 class DrawPolygon;
  23 class ResourceProvider;
  24
  25 // This is the base class for code shared between the GL and software
  26 // renderer implementations.  "Direct" refers to the fact that it does not
  27 // delegate rendering to another compositor.
  28 class CC_EXPORT DirectRenderer : public Renderer {
  29  public:
  30   ~DirectRenderer() override;
  31
  32   void DecideRenderPassAllocationsForFrame(
  33       const RenderPassList& render_passes_in_draw_order) override;
  34   bool HasAllocatedResourcesForTesting(RenderPassId id) const override;
  35   void DrawFrame(RenderPassList* render_passes_in_draw_order,
  36                  float device_scale_factor,
  37                  const gfx::Rect& device_viewport_rect,
  38                  const gfx::Rect& device_clip_rect,
  39                  bool disable_picture_quad_image_filtering) override;
  40
  41   struct CC_EXPORT DrawingFrame {
  42     DrawingFrame();
  43     ~DrawingFrame();
  44
  45     const RenderPassList* render_passes_in_draw_order;
  46     const RenderPass* root_render_pass;
  47     const RenderPass* current_render_pass;
  48     const ScopedResource* current_texture;
  49
  50     gfx::Rect root_damage_rect;
  51     gfx::Rect device_viewport_rect;
  52     gfx::Rect device_clip_rect;
  53
  54     gfx::Transform projection_matrix;
  55     gfx::Transform window_matrix;
  56
  57     bool disable_picture_quad_image_filtering;
  58
  59     OverlayCandidateList overlay_list;
  60   };
  61
  62   void SetEnlargePassTextureAmountForTesting(const gfx::Vector2d& amount);
  63   void DoDrawPolygon(const DrawPolygon& poly,
  64                      DrawingFrame* frame,
  65                      const gfx::Rect& render_pass_scissor,
  66                      bool use_render_pass_scissor);
  67
  68  protected:
  69   enum SurfaceInitializationMode {
  70     SURFACE_INITIALIZATION_MODE_PRESERVE,
  71     SURFACE_INITIALIZATION_MODE_SCISSORED_CLEAR,
  72     SURFACE_INITIALIZATION_MODE_FULL_SURFACE_CLEAR,
  73   };
  74
  75   DirectRenderer(RendererClient* client,
  76                  const RendererSettings* settings,
  77                  OutputSurface* output_surface,
  78                  ResourceProvider* resource_provider);
  79
  80   static gfx::RectF QuadVertexRect();
  81   static void QuadRectTransform(gfx::Transform* quad_rect_transform,
  82                                 const gfx::Transform& quad_transform,
  83                                 const gfx::RectF& quad_rect);
  84   void InitializeViewport(DrawingFrame* frame,
  85                           const gfx::Rect& draw_rect,
  86                           const gfx::Rect& viewport_rect,
  87                           const gfx::Size& surface_size);
  88   gfx::Rect MoveFromDrawToWindowSpace(const DrawingFrame* frame,
  89                                       const gfx::Rect& draw_rect) const;
  90
  91   bool NeedDeviceClip(const DrawingFrame* frame) const;
  92   gfx::Rect DeviceClipRectInDrawSpace(const DrawingFrame* frame) const;
  93   gfx::Rect DeviceViewportRectInDrawSpace(const DrawingFrame* frame) const;
  94   gfx::Rect OutputSurfaceRectInDrawSpace(const DrawingFrame* frame) const;
  95   static gfx::Rect ComputeScissorRectForRenderPass(const DrawingFrame* frame);
  96   void SetScissorStateForQuad(const DrawingFrame* frame,
  97                               const DrawQuad& quad,
  98                               const gfx::Rect& render_pass_scissor,
  99                               bool use_render_pass_scissor);
 100   bool ShouldSkipQuad(const DrawQuad& quad,
 101                       const gfx::Rect& render_pass_scissor);
 102   void SetScissorTestRectInDrawSpace(const DrawingFrame* frame,
 103                                      const gfx::Rect& draw_space_rect);
 104
 105   static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
 106
 107   void FlushPolygons(ScopedPtrDeque<DrawPolygon>* poly_list,
 108                      DrawingFrame* frame,
 109                      const gfx::Rect& render_pass_scissor,
 110                      bool use_render_pass_scissor);
 111   void DrawRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
 112   bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
 113
 114   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
 115   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
 116                                         const ScopedResource* resource,
 117                                         const gfx::Rect& target_rect) = 0;
 118   virtual void SetScissorTestRect(const gfx::Rect& scissor_rect) = 0;
 119   virtual void PrepareSurfaceForPass(
 120       DrawingFrame* frame,
 121       SurfaceInitializationMode initialization_mode,
 122       const gfx::Rect& render_pass_scissor) = 0;
 123   // clip_region is a (possibly null) pointer to a quad in the same
 124   // space as the quad. When non-null only the area of the quad that overlaps
 125   // with clip_region will be drawn.
 126   virtual void DoDrawQuad(DrawingFrame* frame,
 127                           const DrawQuad* quad,
 128                           const gfx::QuadF* clip_region) = 0;
 129   virtual void BeginDrawingFrame(DrawingFrame* frame) = 0;
 130   virtual void FinishDrawingFrame(DrawingFrame* frame) = 0;
 131   virtual void FinishDrawingQuadList();
 132   virtual bool FlippedFramebuffer(const DrawingFrame* frame) const = 0;
 133   virtual void EnsureScissorTestEnabled() = 0;
 134   virtual void EnsureScissorTestDisabled() = 0;
 135   virtual void DiscardBackbuffer() {}
 136   virtual void EnsureBackbuffer() {}
 137
 138   virtual void CopyCurrentRenderPassToBitmap(
 139       DrawingFrame* frame,
 140       scoped_ptr<CopyOutputRequest> request) = 0;
 141
 142   base::ScopedPtrHashMap<RenderPassId, ScopedResource> render_pass_textures_;
 143   OutputSurface* output_surface_;
 144   ResourceProvider* resource_provider_;
 145   scoped_ptr<OverlayProcessor> overlay_processor_;
 146
 147   // For use in coordinate conversion, this stores the output rect, viewport
 148   // rect (= unflipped version of glViewport rect), the size of target
 149   // framebuffer, and the current window space viewport. During a draw, this
 150   // stores the values for the current render pass; in between draws, they
 151   // retain the values for the root render pass of the last draw.
 152   gfx::Rect current_draw_rect_;
 153   gfx::Rect current_viewport_rect_;
 154   gfx::Size current_surface_size_;
 155   gfx::Rect current_window_space_viewport_;
 156
 157  private:
 158   gfx::Vector2d enlarge_pass_texture_amount_;
 159
 160   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 161 };
 162
 163 }  // namespace cc
 164
 165 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_