cc/output/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_RENDERER_H_
   6 #define CC_OUTPUT_RENDERER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/quads/render_pass.h"
  11 #include "cc/trees/layer_tree_host.h"
  12
  13 namespace cc {
  14
  15 class CompositorFrameAck;
  16 class CompositorFrameMetadata;
  17 class ScopedResource;
  18
  19 struct RendererCapabilitiesImpl {
  20   RendererCapabilitiesImpl();
  21   ~RendererCapabilitiesImpl();
  22
  23   // Capabilities copied to main thread.
  24   ResourceFormat best_texture_format;
  25   bool allow_partial_texture_updates;
  26   bool using_offscreen_context3d;
  27   int max_texture_size;
  28   bool using_shared_memory_resources;
  29
  30   // Capabilities used on compositor thread only.
  31   bool using_partial_swap;
  32   bool using_egl_image;
  33   bool avoid_pow2_textures;
  34   bool using_map_image;
  35   bool using_discard_framebuffer;
  36   bool allow_rasterize_on_demand;
  37
  38   RendererCapabilities MainThreadCapabilities() const;
  39 };
  40
  41 class CC_EXPORT RendererClient {
  42  public:
  43   virtual void SetFullRootLayerDamage() = 0;
  44 };
  45
  46 class CC_EXPORT Renderer {
  47  public:
  48   virtual ~Renderer() {}
  49
  50   virtual const RendererCapabilitiesImpl& Capabilities() const = 0;
  51
  52   virtual bool CanReadPixels() const = 0;
  53
  54   virtual void DecideRenderPassAllocationsForFrame(
  55       const RenderPassList& render_passes_in_draw_order) {}
  56   virtual bool HasAllocatedResourcesForTesting(RenderPass::Id id) const;
  57
  58   // This passes ownership of the render passes to the renderer. It should
  59   // consume them, and empty the list. The parameters here may change from frame
  60   // to frame and should not be cached.
  61   // The |device_viewport_rect| and |device_clip_rect| are in non-y-flipped
  62   // window space.
  63   virtual void DrawFrame(RenderPassList* render_passes_in_draw_order,
  64                          ContextProvider* offscreen_context_provider,
  65                          float device_scale_factor,
  66                          const gfx::Rect& device_viewport_rect,
  67                          const gfx::Rect& device_clip_rect,
  68                          bool disable_picture_quad_image_filtering) = 0;
  69
  70   // Waits for rendering to finish.
  71   virtual void Finish() = 0;
  72
  73   virtual void DoNoOp() {}
  74
  75   // Puts backbuffer onscreen.
  76   virtual void SwapBuffers(const CompositorFrameMetadata& metadata) = 0;
  77   virtual void ReceiveSwapBuffersAck(const CompositorFrameAck& ack) {}
  78
  79   virtual void GetFramebufferPixels(void* pixels, const gfx::Rect& rect) = 0;
  80
  81   virtual bool IsContextLost();
  82
  83   virtual void SetVisible(bool visible) = 0;
  84
  85   virtual void SendManagedMemoryStats(size_t bytes_visible,
  86                                       size_t bytes_visible_and_nearby,
  87                                       size_t bytes_allocated) = 0;
  88
  89  protected:
  90   explicit Renderer(RendererClient* client, const LayerTreeSettings* settings)
  91       : client_(client), settings_(settings) {}
  92
  93   RendererClient* client_;
  94   const LayerTreeSettings* settings_;
  95
  96  private:
  97   DISALLOW_COPY_AND_ASSIGN(Renderer);
  98 };
  99
 100 }  // namespace cc
 101
 102 #endif  // CC_OUTPUT_RENDERER_H_