| /* |
| * 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 "src/gpu/vk/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: // fall through |
| case kHalf_GrSLType: |
| return 1; |
| case kFloat2_GrSLType: // fall through |
| case kHalf2_GrSLType: |
| return 1; |
| case kFloat3_GrSLType: |
| case kHalf3_GrSLType: |
| return 1; |
| case kFloat4_GrSLType: |
| case kHalf4_GrSLType: |
| return 1; |
| case kInt2_GrSLType: |
| case kUint2_GrSLType: |
| case kShort2_GrSLType: |
| case kUShort2_GrSLType: |
| case kByte2_GrSLType: |
| case kUByte2_GrSLType: |
| return 1; |
| case kInt3_GrSLType: |
| case kUint3_GrSLType: |
| case kShort3_GrSLType: |
| case kUShort3_GrSLType: |
| case kByte3_GrSLType: |
| case kUByte3_GrSLType: |
| return 1; |
| case kInt4_GrSLType: |
| case kUint4_GrSLType: |
| case kShort4_GrSLType: |
| case kUShort4_GrSLType: |
| case kByte4_GrSLType: |
| case kUByte4_GrSLType: |
| return 1; |
| case kFloat2x2_GrSLType: |
| case kHalf2x2_GrSLType: |
| return 2; |
| case kFloat3x3_GrSLType: |
| case kHalf3x3_GrSLType: |
| return 3; |
| case kFloat4x4_GrSLType: |
| case kHalf4x4_GrSLType: |
| return 4; |
| case kTexture2DSampler_GrSLType: |
| case kSampler_GrSLType: |
| case kTexture2D_GrSLType: |
| case kInput_GrSLType: |
| return 0; |
| case kTextureExternalSampler_GrSLType: |
| return 0; |
| case kTexture2DRectSampler_GrSLType: |
| return 0; |
| case kBool_GrSLType: |
| case kBool2_GrSLType: |
| case kBool3_GrSLType: |
| case kBool4_GrSLType: |
| return 1; |
| case kInt_GrSLType: // fall through |
| case kShort_GrSLType: |
| case kByte_GrSLType: |
| return 1; |
| case kUint_GrSLType: // fall through |
| case kUShort_GrSLType: |
| case kUByte_GrSLType: |
| return 1; |
| } |
| SK_ABORT("Unexpected type"); |
| } |
| |
| static void finalize_helper(GrVkVaryingHandler::VarArray& vars) { |
| int locationIndex = 0; |
| for (GrShaderVar& var : vars.items()) { |
| SkString location; |
| location.appendf("location = %d", locationIndex); |
| var.addLayoutQualifier(location.c_str()); |
| |
| int elementSize = grsltype_to_location_size(var.getType()); |
| SkASSERT(elementSize > 0); |
| int numElements = 1; |
| if (var.isArray() && !var.isUnsizedArray()) { |
| numElements = var.getArrayCount(); |
| } |
| SkASSERT(numElements > 0); |
| 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); |
| } |