1 2 /* 3 * Copyright 2013 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #ifndef GrDrawTargetCaps_DEFINED 9 #define GrDrawTargetCaps_DEFINED 10 11 #include "GrTypes.h" 12 #include "SkRefCnt.h" 13 #include "SkString.h" 14 15 /** 16 * Represents the draw target capabilities. 17 */ 18 class GrDrawTargetCaps : public SkRefCnt { 19 public: 20 SK_DECLARE_INST_COUNT(Caps) 21 22 GrDrawTargetCaps() { this->reset(); } 23 GrDrawTargetCaps(const GrDrawTargetCaps& other) : INHERITED() { *this = other; } 24 GrDrawTargetCaps& operator= (const GrDrawTargetCaps&); 25 26 virtual void reset(); 27 virtual SkString dump() const; 28 29 bool npotTextureTileSupport() const { return fNPOTTextureTileSupport; } 30 /** To avoid as-yet-unnecessary complexity we don't allow any partial support of MIP Maps (e.g. 31 only for POT textures) */ 32 bool mipMapSupport() const { return fMipMapSupport; } 33 bool twoSidedStencilSupport() const { return fTwoSidedStencilSupport; } 34 bool stencilWrapOpsSupport() const { return fStencilWrapOpsSupport; } 35 bool hwAALineSupport() const { return fHWAALineSupport; } 36 bool shaderDerivativeSupport() const { return fShaderDerivativeSupport; } 37 bool geometryShaderSupport() const { return fGeometryShaderSupport; } 38 bool dualSourceBlendingSupport() const { return fDualSourceBlendingSupport; } 39 bool pathRenderingSupport() const { return fPathRenderingSupport; } 40 bool dstReadInShaderSupport() const { return fDstReadInShaderSupport; } 41 bool discardRenderTargetSupport() const { return fDiscardRenderTargetSupport; } 42 bool gpuTracingSupport() const { return fGpuTracingSupport; } 43 44 /** 45 * Indicates whether GPU->CPU memory mapping for GPU resources such as vertex buffers and 46 * textures allows partial mappings or full mappings. 47 */ 48 enum MapFlags { 49 kNone_MapFlags = 0x0, //<! Cannot map the resource. 50 51 kCanMap_MapFlag = 0x1, //<! The resource can be mapped. Must be set for any of 52 // the other flags to have meaning.k 53 kSubset_MapFlag = 0x2, //<! The resource can be partially mapped. 54 }; 55 56 uint32_t mapBufferFlags() const { return fMapBufferFlags; } 57 58 // Scratch textures not being reused means that those scratch textures 59 // that we upload to (i.e., don't have a render target) will not be 60 // recycled in the texture cache. This is to prevent ghosting by drivers 61 // (in particular for deferred architectures). 62 bool reuseScratchTextures() const { return fReuseScratchTextures; } 63 64 int maxRenderTargetSize() const { return fMaxRenderTargetSize; } 65 int maxTextureSize() const { return fMaxTextureSize; } 66 // Will be 0 if MSAA is not supported 67 int maxSampleCount() const { return fMaxSampleCount; } 68 69 bool isConfigRenderable(GrPixelConfig config, bool withMSAA) const { 70 SkASSERT(kGrPixelConfigCnt > config); 71 return fConfigRenderSupport[config][withMSAA]; 72 } 73 74 bool isConfigTexturable(GrPixelConfig config) const { 75 SkASSERT(kGrPixelConfigCnt > config); 76 return fConfigTextureSupport[config]; 77 } 78 79 protected: 80 bool fNPOTTextureTileSupport : 1; 81 bool fMipMapSupport : 1; 82 bool fTwoSidedStencilSupport : 1; 83 bool fStencilWrapOpsSupport : 1; 84 bool fHWAALineSupport : 1; 85 bool fShaderDerivativeSupport : 1; 86 bool fGeometryShaderSupport : 1; 87 bool fDualSourceBlendingSupport : 1; 88 bool fPathRenderingSupport : 1; 89 bool fDstReadInShaderSupport : 1; 90 bool fDiscardRenderTargetSupport: 1; 91 bool fReuseScratchTextures : 1; 92 bool fGpuTracingSupport : 1; 93 94 uint32_t fMapBufferFlags; 95 96 int fMaxRenderTargetSize; 97 int fMaxTextureSize; 98 int fMaxSampleCount; 99 100 // The first entry for each config is without msaa and the second is with. 101 bool fConfigRenderSupport[kGrPixelConfigCnt][2]; 102 bool fConfigTextureSupport[kGrPixelConfigCnt]; 103 104 typedef SkRefCnt INHERITED; 105 }; 106 107 #endif 108
