Add detection of mip support

src/gpu/GrDrawTargetCaps.h

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrDrawTargetCaps_DEFINED
 #define GrDrawTargetCaps_DEFINED
 
@@ skipping 10 matching lines @@
 
     GrDrawTargetCaps() { this->reset(); }
     GrDrawTargetCaps(const GrDrawTargetCaps& other) : INHERITED() { *this = other; }
     GrDrawTargetCaps& operator= (const GrDrawTargetCaps&);
 
     virtual void reset();
     virtual SkString dump() const;
 
     bool eightBitPaletteSupport() const { return f8BitPaletteSupport; }
     bool npotTextureTileSupport() const { return fNPOTTextureTileSupport; }
+    /** To avoid as-yet-unnecessary complexity we don't allow any partial support of MIP Maps (e.g.
+        only for POT textures) */
+    bool mipMapSupport() const { return fMipMapSupport; }
     bool twoSidedStencilSupport() const { return fTwoSidedStencilSupport; }
     bool stencilWrapOpsSupport() const { return  fStencilWrapOpsSupport; }
     bool hwAALineSupport() const { return fHWAALineSupport; }
     bool shaderDerivativeSupport() const { return fShaderDerivativeSupport; }
     bool geometryShaderSupport() const { return fGeometryShaderSupport; }
     bool dualSourceBlendingSupport() const { return fDualSourceBlendingSupport; }
     bool bufferLockSupport() const { return fBufferLockSupport; }
     bool pathRenderingSupport() const { return fPathRenderingSupport; }
     bool dstReadInShaderSupport() const { return fDstReadInShaderSupport; }
 
     // Scratch textures not being reused means that those scratch textures
     // that we upload to (i.e., don't have a render target) will not be
     // recycled in the texture cache. This is to prevent ghosting by drivers
     // (in particular for deferred architectures).
     bool reuseScratchTextures() const { return fReuseScratchTextures; }
 
     int maxRenderTargetSize() const { return fMaxRenderTargetSize; }
     int maxTextureSize() const { return fMaxTextureSize; }
     // Will be 0 if MSAA is not supported
     int maxSampleCount() const { return fMaxSampleCount; }
 
     bool isConfigRenderable(GrPixelConfig config, bool withMSAA) const {
         SkASSERT(kGrPixelConfigCnt > config);
         return fConfigRenderSupport[config][withMSAA];
     }
 
 protected:
     bool f8BitPaletteSupport        : 1;
     bool fNPOTTextureTileSupport    : 1;
+    bool fMipMapSupport             : 1;
     bool fTwoSidedStencilSupport    : 1;
     bool fStencilWrapOpsSupport     : 1;
     bool fHWAALineSupport           : 1;
     bool fShaderDerivativeSupport   : 1;
     bool fGeometryShaderSupport     : 1;
     bool fDualSourceBlendingSupport : 1;
     bool fBufferLockSupport         : 1;
     bool fPathRenderingSupport      : 1;
     bool fDstReadInShaderSupport    : 1;
     bool fReuseScratchTextures      : 1;
 
     int fMaxRenderTargetSize;
     int fMaxTextureSize;
     int fMaxSampleCount;
 
     // The first entry for each config is without msaa and the second is with.
     bool fConfigRenderSupport[kGrPixelConfigCnt][2];
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif