1 /* 2 * Copyright 2015 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 GrVkProgramDesc_DEFINED 9 #define GrVkProgramDesc_DEFINED 10 11 #include "GrColor.h" 12 #include "GrProgramDesc.h" 13 #include "GrGpu.h" 14 #include "GrTypesPriv.h" 15 16 #include "shaderc/shaderc.h" 17 #include "vulkan/vulkan.h" 18 19 class GrVkGpu; 20 class GrVkProgramDescBuilder; 21 22 class GrVkProgramDesc : public GrProgramDesc { 23 private: 24 friend class GrVkProgramDescBuilder; 25 }; 26 27 /** 28 * This class can be used to build a GrProgramDesc. It also provides helpers for accessing 29 * GL specific info in the header. 30 */ 31 class GrVkProgramDescBuilder { 32 public: 33 typedef GrProgramDesc::KeyHeader KeyHeader; 34 // The key, stored in fKey, is composed of five parts(first 2 are defined in the key itself): 35 // 1. uint32_t for total key length. 36 // 2. uint32_t for a checksum. 37 // 3. Header struct defined above. 38 // 4. Backend-specific information including per-processor keys and their key lengths. 39 // Each processor's key is a variable length array of uint32_t. 40 enum { 41 // Part 3. 42 kHeaderOffset = GrVkProgramDesc::kHeaderOffset, 43 kHeaderSize = SkAlign4(sizeof(KeyHeader)), 44 // Part 4. 45 // This is the offset into the backenend specific part of the key, which includes 46 // per-processor keys. 47 kProcessorKeysOffset = kHeaderOffset + kHeaderSize, 48 }; 49 50 /** 51 * Builds a GL specific program descriptor 52 * 53 * @param GrPrimitiveProcessor The geometry 54 * @param GrPipeline The optimized drawstate. The descriptor will represent a program 55 * which this optstate can use to draw with. The optstate contains 56 * general draw information, as well as the specific color, geometry, 57 * and coverage stages which will be used to generate the GL Program for 58 * this optstate. 59 * @param GrVkGpu A GL Gpu, the caps and Gpu object are used to output processor specific 60 * parts of the descriptor. 61 * @param GrProgramDesc The built and finalized descriptor 62 **/ 63 static bool Build(GrProgramDesc*, 64 const GrPrimitiveProcessor&, 65 const GrPipeline&, 66 const GrGLSLCaps&); 67 }; 68 69 #endif 70
