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(const RenderPassList& renderPassesInDrawOrder, const 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         WebKit::WebTransformationMatrix projectionMatrix;
  43         WebKit::WebTransformationMatrix windowMatrix;
  44         bool flippedY;
  45         gfx::RectF scissorRectInRenderPassSpace;
  46     };
  47
  48 protected:
  49     DirectRenderer(RendererClient* client, ResourceProvider* resourceProvider);
  50
  51     class CachedResource : public ScopedResource {
  52     public:
  53         static scoped_ptr<CachedResource> create(ResourceProvider* resourceProvider) {
  54           return make_scoped_ptr(new CachedResource(resourceProvider));
  55         }
  56         virtual ~CachedResource() {}
  57
  58         bool isComplete() const { return m_isComplete; }
  59         void setIsComplete(bool isComplete) { m_isComplete = isComplete; }
  60
  61     protected:
  62         explicit CachedResource(ResourceProvider* resourceProvider)
  63             : ScopedResource(resourceProvider)
  64             , m_isComplete(false)
  65         {
  66         }
  67
  68     private:
  69         bool m_isComplete;
  70
  71         DISALLOW_COPY_AND_ASSIGN(CachedResource);
  72     };
  73
  74     static gfx::RectF quadVertexRect();
  75     static void quadRectTransform(WebKit::WebTransformationMatrix* quadRectTransform, const WebKit::WebTransformationMatrix& quadTransform, const gfx::RectF& quadRect);
  76     static void initializeMatrices(DrawingFrame&, const gfx::Rect& drawRect, bool flipY);
  77     static gfx::Rect moveScissorToWindowSpace(const DrawingFrame&, gfx::RectF scissorRect);
  78
  79     bool haveCachedResources(RenderPass::Id) const;
  80     static gfx::Size renderPassTextureSize(const RenderPass*);
  81     static GLenum renderPassTextureFormat(const RenderPass*);
  82
  83     void drawRenderPass(DrawingFrame&, const RenderPass*);
  84     bool useRenderPass(DrawingFrame&, const RenderPass*);
  85
  86     virtual void bindFramebufferToOutputSurface(DrawingFrame&) = 0;
  87     virtual bool bindFramebufferToTexture(DrawingFrame&, const ScopedResource*, const gfx::Rect& framebufferRect) = 0;
  88     virtual void setDrawViewportSize(const gfx::Size&) = 0;
  89     virtual void setScissorTestRect(const gfx::Rect& scissorRect) = 0;
  90     virtual void clearFramebuffer(DrawingFrame&) = 0;
  91     virtual void drawQuad(DrawingFrame&, const DrawQuad*) = 0;
  92     virtual void beginDrawingFrame(DrawingFrame&) = 0;
  93     virtual void finishDrawingFrame(DrawingFrame&) = 0;
  94     virtual bool flippedFramebuffer() const = 0;
  95
  96     ScopedPtrHashMap<RenderPass::Id, CachedResource> m_renderPassTextures;
  97     ResourceProvider* m_resourceProvider;
  98
  99 private:
 100     DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 101 };
 102
 103 }  // namespace cc
 104
 105 #endif  // CC_DIRECT_RENDERER_H_