| /* |
| * 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) { |
| switch(type) { |
| case kVoid_GrSLType: |
| return 0; |
| case kFloat_GrSLType: |
| return 1; |
| case kVec2f_GrSLType: |
| return 1; |
| case kVec3f_GrSLType: |
| return 1; |
| case kVec4f_GrSLType: |
| return 1; |
| case kMat22f_GrSLType: |
| return 2; |
| case kMat33f_GrSLType: |
| return 3; |
| case kMat44f_GrSLType: |
| return 4; |
| case kTexture2DSampler_GrSLType: |
| return 0; |
| case kITexture2DSampler_GrSLType: |
| return 0; |
| case kTextureExternalSampler_GrSLType: |
| return 0; |
| case kTexture2DRectSampler_GrSLType: |
| return 0; |
| case kBufferSampler_GrSLType: |
| return 0; |
| case kBool_GrSLType: |
| return 1; |
| case kInt_GrSLType: |
| return 1; |
| case kUint_GrSLType: |
| return 1; |
| case kTexture2D_GrSLType: |
| return 0; |
| case kSampler_GrSLType: |
| return 0; |
| } |
| SkFAIL("Unexpected type"); |
| return -1; |
| } |
| |
| 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); |
| } |