Line data    Source code

       1             : /*
       2             :  * Copyright 2017 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #ifndef GrPreFlushResourceProvider_DEFINED
       9             : #define GrPreFlushResourceProvider_DEFINED
      10             : 
      11             : #include "GrTypes.h"
      12             : #include "GrNonAtomicRef.h"
      13             : 
      14             : // These two are just for GrPreFlushCallbackObject
      15             : #include "SkRefCnt.h"
      16             : #include "SkTDArray.h"
      17             : 
      18             : class GrDrawingManager;
      19             : class GrOpList;
      20             : class GrPreFlushResourceProvider;
      21             : class GrRenderTargetOpList;
      22             : class GrRenderTargetContext;
      23             : class GrSurfaceProxy;
      24             : 
      25             : class SkColorSpace;
      26             : class SkSurfaceProps;
      27             : 
      28             : /*
      29             :  * This is the base class from which all per-flush callback objects must be derived. It
      30             :  * provides the "preFlush" interface.
      31             :  */
      32             : class GrPreFlushCallbackObject : public GrNonAtomicRef<GrPreFlushCallbackObject> {
      33             : public:
      34             :     virtual ~GrPreFlushCallbackObject() { }
      35             : 
      36             :     /*
      37             :      * The preFlush callback allows subsystems (e.g., text, path renderers) to create atlases
      38             :      * for a specific flush. All the GrOpList IDs required for the flush are passed into the
      39             :      * callback. The callback should return the render target contexts used to render the atlases
      40             :      * in 'results'.
      41             :      */
      42             :     virtual void preFlush(GrPreFlushResourceProvider*,
      43             :                           const uint32_t* opListIDs, int numOpListIDs,
      44             :                           SkTArray<sk_sp<GrRenderTargetContext>>* results) = 0;
      45             : 
      46             : private:
      47             :     typedef SkRefCnt INHERITED;
      48             : };
      49             : 
      50             : /*
      51             :  * This class is a shallow wrapper around the drawing manager. It is passed into the
      52             :  * preFlush callbacks and is intended to limit the functionality available to them.
      53             :  * It should never have additional data members or virtual methods.
      54             :  */
      55             : class GrPreFlushResourceProvider {
      56             : public:
      57             :     sk_sp<GrRenderTargetContext> makeRenderTargetContext(const GrSurfaceDesc& desc,
      58             :                                                          sk_sp<SkColorSpace> colorSpace,
      59             :                                                          const SkSurfaceProps* props);
      60             : 
      61             :     // TODO: we only need this entry point as long as we have to pre-allocate the atlas.
      62             :     // Remove it ASAP.
      63             :     sk_sp<GrRenderTargetContext> makeRenderTargetContext(sk_sp<GrSurfaceProxy> proxy,
      64             :                                                          sk_sp<SkColorSpace> colorSpace,
      65             :                                                          const SkSurfaceProps* props);
      66             : 
      67             : private:
      68           0 :     explicit GrPreFlushResourceProvider(GrDrawingManager* drawingMgr) : fDrawingMgr(drawingMgr) {}
      69             :     GrPreFlushResourceProvider(const GrPreFlushResourceProvider&); // unimpl
      70             :     GrPreFlushResourceProvider& operator=(const GrPreFlushResourceProvider&); // unimpl
      71             : 
      72             :     GrDrawingManager* fDrawingMgr;
      73             : 
      74             :     friend class GrDrawingManager; // to construct this type.
      75             : };
      76             : 
      77             : #endif