src/cc/quads/render_pass.h

   1 // Copyright 2011 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_QUADS_RENDER_PASS_H_
   6 #define CC_QUADS_RENDER_PASS_H_
   7
   8 #include <utility>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/containers/hash_tables.h"
  13 #include "cc/base/cc_export.h"
  14 #include "cc/base/scoped_ptr_vector.h"
  15 #include "cc/quads/list_container.h"
  16 #include "cc/quads/render_pass_id.h"
  17 #include "skia/ext/refptr.h"
  18 #include "ui/gfx/geometry/rect.h"
  19 #include "ui/gfx/geometry/rect_f.h"
  20 #include "ui/gfx/transform.h"
  21
  22 namespace base {
  23 namespace debug {
  24 class TracedValue;
  25 }
  26 class Value;
  27 };
  28
  29 namespace cc {
  30
  31 class DrawQuad;
  32 class CopyOutputRequest;
  33 class RenderPassDrawQuad;
  34 class SharedQuadState;
  35
  36 // A list of DrawQuad objects, sorted internally in front-to-back order.
  37 class QuadList : public ListContainer<DrawQuad> {
  38  public:
  39   explicit QuadList(size_t default_size_to_reserve);
  40
  41   typedef QuadList::ReverseIterator BackToFrontIterator;
  42   typedef QuadList::ConstReverseIterator ConstBackToFrontIterator;
  43
  44   inline BackToFrontIterator BackToFrontBegin() { return rbegin(); }
  45   inline BackToFrontIterator BackToFrontEnd() { return rend(); }
  46   inline ConstBackToFrontIterator BackToFrontBegin() const { return rbegin(); }
  47   inline ConstBackToFrontIterator BackToFrontEnd() const { return rend(); }
  48 };
  49
  50 typedef ListContainer<SharedQuadState> SharedQuadStateList;
  51
  52 class CC_EXPORT RenderPass {
  53  public:
  54   ~RenderPass();
  55
  56   static scoped_ptr<RenderPass> Create();
  57   static scoped_ptr<RenderPass> Create(size_t num_layers);
  58   static scoped_ptr<RenderPass> Create(size_t shared_quad_state_list_size,
  59                                        size_t quad_list_size);
  60
  61   // A shallow copy of the render pass, which does not include its quads or copy
  62   // requests.
  63   scoped_ptr<RenderPass> Copy(RenderPassId new_id) const;
  64
  65   // A deep copy of the render passes in the list including the quads.
  66   static void CopyAll(const ScopedPtrVector<RenderPass>& in,
  67                       ScopedPtrVector<RenderPass>* out);
  68
  69   void SetNew(RenderPassId id,
  70               const gfx::Rect& output_rect,
  71               const gfx::Rect& damage_rect,
  72               const gfx::Transform& transform_to_root_target);
  73
  74   void SetAll(RenderPassId id,
  75               const gfx::Rect& output_rect,
  76               const gfx::Rect& damage_rect,
  77               const gfx::Transform& transform_to_root_target,
  78               bool has_transparent_background);
  79
  80   void AsValueInto(base::debug::TracedValue* dict) const;
  81
  82   SharedQuadState* CreateAndAppendSharedQuadState();
  83
  84   template <typename DrawQuadType>
  85   DrawQuadType* CreateAndAppendDrawQuad() {
  86     return quad_list.AllocateAndConstruct<DrawQuadType>();
  87   }
  88
  89   RenderPassDrawQuad* CopyFromAndAppendRenderPassDrawQuad(
  90       const RenderPassDrawQuad* quad,
  91       const SharedQuadState* shared_quad_state,
  92       RenderPassId render_pass_id);
  93   DrawQuad* CopyFromAndAppendDrawQuad(const DrawQuad* quad,
  94                                       const SharedQuadState* shared_quad_state);
  95
  96   // Uniquely identifies the render pass in the compositor's current frame.
  97   RenderPassId id;
  98
  99   // These are in the space of the render pass' physical pixels.
 100   gfx::Rect output_rect;
 101   gfx::Rect damage_rect;
 102
 103   // Transforms from the origin of the |output_rect| to the origin of the root
 104   // render pass' |output_rect|.
 105   gfx::Transform transform_to_root_target;
 106
 107   // If false, the pixels in the render pass' texture are all opaque.
 108   bool has_transparent_background;
 109
 110   // If non-empty, the renderer should produce a copy of the render pass'
 111   // contents as a bitmap, and give a copy of the bitmap to each callback in
 112   // this list. This property should not be serialized between compositors, as
 113   // it only makes sense in the root compositor.
 114   ScopedPtrVector<CopyOutputRequest> copy_requests;
 115
 116   QuadList quad_list;
 117   SharedQuadStateList shared_quad_state_list;
 118
 119  protected:
 120   explicit RenderPass(size_t num_layers);
 121   RenderPass();
 122   RenderPass(size_t shared_quad_state_list_size, size_t quad_list_size);
 123
 124  private:
 125   template <typename DrawQuadType>
 126   DrawQuadType* CopyFromAndAppendTypedDrawQuad(const DrawQuad* quad) {
 127     return quad_list.AllocateAndCopyFrom(DrawQuadType::MaterialCast(quad));
 128   }
 129
 130   DISALLOW_COPY_AND_ASSIGN(RenderPass);
 131 };
 132
 133 }  // namespace cc
 134
 135 namespace BASE_HASH_NAMESPACE {
 136 template <>
 137 struct hash<cc::RenderPassId> {
 138   size_t operator()(cc::RenderPassId key) const {
 139     return base::HashPair(key.layer_id, key.index);
 140   }
 141 };
 142 }  // namespace BASE_HASH_NAMESPACE
 143
 144 namespace cc {
 145 typedef ScopedPtrVector<RenderPass> RenderPassList;
 146 typedef base::hash_map<RenderPassId, RenderPass*> RenderPassIdHashMap;
 147 }  // namespace cc
 148
 149 #endif  // CC_QUADS_RENDER_PASS_H_