cc/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_DIRECT_RENDERER_H_
   6 #define CC_DIRECT_RENDERER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/cc_export.h"
  10 #include "cc/renderer.h"
  11 #include "cc/resource_provider.h"
  12 #include "cc/scoped_resource.h"
  13
  14 namespace cc {
  15
  16 class ResourceProvider;
  17
  18 // This is the base class for code shared between the GL and software
  19 // renderer implementations.  "Direct" refers to the fact that it does not
  20 // delegate rendering to another compositor.
  21 class CC_EXPORT DirectRenderer : public Renderer {
  22 public:
  23     virtual ~DirectRenderer();
  24
  25     ResourceProvider* resourceProvider() const { return m_resourceProvider; }
  26
  27     virtual void decideRenderPassAllocationsForFrame(const RenderPassList& renderPassesInDrawOrder) OVERRIDE;
  28     virtual bool haveCachedResourcesForRenderPassId(RenderPass::Id) const OVERRIDE;
  29     virtual void drawFrame(RenderPassList& renderPassesInDrawOrder, RenderPassIdHashMap& renderPassesById) OVERRIDE;
  30
  31     struct CC_EXPORT DrawingFrame {
  32         DrawingFrame();
  33         ~DrawingFrame();
  34
  35         const RenderPassIdHashMap* renderPassesById;
  36         const RenderPass* rootRenderPass;
  37         const RenderPass* currentRenderPass;
  38         const ScopedResource* currentTexture;
  39
  40         gfx::RectF rootDamageRect;
  41
  42         gfx::Transform projectionMatrix;
  43         gfx::Transform windowMatrix;
  44         bool flippedY;
  45     };
  46
  47 protected:
  48     DirectRenderer(RendererClient* client, ResourceProvider* resourceProvider);
  49
  50     class CachedResource : public ScopedResource {
  51     public:
  52         static scoped_ptr<CachedResource> create(ResourceProvider* resourceProvider) {
  53           return make_scoped_ptr(new CachedResource(resourceProvider));
  54         }
  55         virtual ~CachedResource() {}
  56
  57         bool isComplete() const { return m_isComplete; }
  58         void setIsComplete(bool isComplete) { m_isComplete = isComplete; }
  59
  60     protected:
  61         explicit CachedResource(ResourceProvider* resourceProvider)
  62             : ScopedResource(resourceProvider)
  63             , m_isComplete(false)
  64         {
  65         }
  66
  67     private:
  68         bool m_isComplete;
  69
  70         DISALLOW_COPY_AND_ASSIGN(CachedResource);
  71     };
  72
  73     static gfx::RectF quadVertexRect();
  74     static void quadRectTransform(gfx::Transform* quadRectTransform, const gfx::Transform& quadTransform, const gfx::RectF& quadRect);
  75     static void initializeMatrices(DrawingFrame&, const gfx::Rect& drawRect, bool flipY);
  76     static gfx::Rect moveScissorToWindowSpace(const DrawingFrame&, gfx::RectF scissorRect);
  77     static gfx::RectF computeScissorRectForRenderPass(const DrawingFrame& frame);
  78     void setScissorStateForQuad(const DrawingFrame& frame, const DrawQuad& quad);
  79     void setScissorStateForQuadWithRenderPassScissor(const DrawingFrame& frame, const DrawQuad& quad, const gfx::RectF& renderPassScissor, bool* shouldSkipQuad);
  80
  81     bool haveCachedResources(RenderPass::Id) const;
  82     static gfx::Size renderPassTextureSize(const RenderPass*);
  83     static GLenum renderPassTextureFormat(const RenderPass*);
  84
  85     void drawRenderPass(DrawingFrame&, const RenderPass*);
  86     bool useRenderPass(DrawingFrame&, const RenderPass*);
  87
  88     virtual void bindFramebufferToOutputSurface(DrawingFrame&) = 0;
  89     virtual bool bindFramebufferToTexture(DrawingFrame&, const ScopedResource*, const gfx::Rect& framebufferRect) = 0;
  90     virtual void setDrawViewportSize(const gfx::Size&) = 0;
  91     virtual void setScissorTestRect(const gfx::Rect& scissorRect) = 0;
  92     virtual void clearFramebuffer(DrawingFrame&) = 0;
  93     virtual void drawQuad(DrawingFrame&, const DrawQuad*) = 0;
  94     virtual void beginDrawingFrame(DrawingFrame&) = 0;
  95     virtual void finishDrawingFrame(DrawingFrame&) = 0;
  96     virtual void finishDrawingQuadList();
  97     virtual bool flippedFramebuffer() const = 0;
  98     virtual void ensureScissorTestEnabled() = 0;
  99     virtual void ensureScissorTestDisabled() = 0;
 100
 101     ScopedPtrHashMap<RenderPass::Id, CachedResource> m_renderPassTextures;
 102     ResourceProvider* m_resourceProvider;
 103
 104 private:
 105     DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 106 };
 107
 108 }  // namespace cc
 109
 110 #endif  // CC_DIRECT_RENDERER_H_