| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrVkVaryingHandler.h" |
| |
| /** Returns the number of locations take up by a given GrSLType. We assume that all |
| scalar values are 32 bits. */ |
| static inline int grsltype_to_location_size(GrSLType type) { |
| static const uint32_t kSizes[] = { |
| 0, // kVoid_GrSLType |
| 1, // kFloat_GrSLType |
| 1, // kVec2f_GrSLType |
| 1, // kVec3f_GrSLType |
| 1, // kVec4f_GrSLType |
| 2, // kMat22f_GrSLType |
| 3, // kMat33f_GrSLType |
| 4, // kMat44f_GrSLType |
| 0, // kTexture2DSampler_GrSLType |
| 0, // kTexture2DISampler_GrSLType |
| 0, // kTextureExternalSampler_GrSLType |
| 0, // kTexture2DRectSampler_GrSLType |
| 0, // kTextureBufferSampler_GrSLType |
| 1, // kBool_GrSLType |
| 1, // kInt_GrSLType |
| 1, // kUint_GrSLType |
| 0, // kTexture2D_GrSLType |
| 0, // kSampler_GrSLType |
| }; |
| return kSizes[type]; |
| |
| GR_STATIC_ASSERT(0 == kVoid_GrSLType); |
| GR_STATIC_ASSERT(1 == kFloat_GrSLType); |
| GR_STATIC_ASSERT(2 == kVec2f_GrSLType); |
| GR_STATIC_ASSERT(3 == kVec3f_GrSLType); |
| GR_STATIC_ASSERT(4 == kVec4f_GrSLType); |
| GR_STATIC_ASSERT(5 == kMat22f_GrSLType); |
| GR_STATIC_ASSERT(6 == kMat33f_GrSLType); |
| GR_STATIC_ASSERT(7 == kMat44f_GrSLType); |
| GR_STATIC_ASSERT(8 == kTexture2DSampler_GrSLType); |
| GR_STATIC_ASSERT(9 == kTexture2DISampler_GrSLType); |
| GR_STATIC_ASSERT(10 == kTextureExternalSampler_GrSLType); |
| GR_STATIC_ASSERT(11 == kTexture2DRectSampler_GrSLType); |
| GR_STATIC_ASSERT(12 == kTextureBufferSampler_GrSLType); |
| GR_STATIC_ASSERT(13 == kBool_GrSLType); |
| GR_STATIC_ASSERT(14 == kInt_GrSLType); |
| GR_STATIC_ASSERT(15 == kUint_GrSLType); |
| GR_STATIC_ASSERT(16 == kTexture2D_GrSLType); |
| GR_STATIC_ASSERT(17 == kSampler_GrSLType); |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(kSizes) == kGrSLTypeCount); |
| } |
| |
| void finalize_helper(GrVkVaryingHandler::VarArray& vars) { |
| int locationIndex = 0; |
| for (int i = 0; i < vars.count(); ++i) { |
| GrGLSLShaderVar& var = vars[i]; |
| SkString location; |
| location.appendf("location = %d", locationIndex); |
| var.setLayoutQualifier(location.c_str()); |
| |
| int elementSize = grsltype_to_location_size(var.getType()); |
| SkASSERT(elementSize); |
| int numElements = 1; |
| if (var.isArray()) { |
| numElements = var.getArrayCount(); |
| } |
| locationIndex += elementSize * numElements; |
| } |
| // Vulkan requires at least 64 locations to be supported for both vertex output and fragment |
| // input. If we ever hit this assert, then we'll need to add a cap to actually check the |
| // supported input and output values and adjust our supported shaders based on those values. |
| SkASSERT(locationIndex <= 64); |
| } |
| |
| void GrVkVaryingHandler::onFinalize() { |
| finalize_helper(fVertexInputs); |
| finalize_helper(fVertexOutputs); |
| finalize_helper(fGeomInputs); |
| finalize_helper(fGeomOutputs); |
| finalize_helper(fFragInputs); |
| finalize_helper(fFragOutputs); |
| } |