Revert of Add vulkan files into skia repo.

src/gpu/vk/GrVkUniformHandler.cpp

-/*
-* 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 "GrVkUniformHandler.h"
-#include "glsl/GrGLSLProgramBuilder.h"
-
-// To determine whether a current offset is aligned, we can just 'and' the lowest bits with the
-// alignment mask. A value of 0 means aligned, any other value is how many bytes past alignment we
-// are. This works since all alignments are powers of 2. The mask is always (alignment - 1).
-uint32_t grsltype_to_alignment_mask(GrSLType type) {
-    SkASSERT(GrSLTypeIsFloatType(type));
-    static const uint32_t kAlignments[kGrSLTypeCount] = {
-        0x0, // kVoid_GrSLType, should never return this
-        0x3, // kFloat_GrSLType
-        0x7, // kVec2f_GrSLType
-        0xF, // kVec3f_GrSLType
-        0xF, // kVec4f_GrSLType
-        0xF, // kMat33f_GrSLType
-        0xF, // kMat44f_GrSLType
-        0x0, // Sampler2D_GrSLType, should never return this
-        0x0, // SamplerExternal_GrSLType, should never return this
-    };
-    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 == kMat33f_GrSLType);
-    GR_STATIC_ASSERT(6 == kMat44f_GrSLType);
-    GR_STATIC_ASSERT(7 == kSampler2D_GrSLType);
-    GR_STATIC_ASSERT(8 == kSamplerExternal_GrSLType);
-    GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAlignments) == kGrSLTypeCount);
-    return kAlignments[type];
-}
-
-// Given the current offset into the ubo, calculate the offset for the uniform we're trying to add
-// taking into consideration all alignment requirements. The uniformOffset is set to the offset for
-// the new uniform, and currentOffset is updated to be the offset to the end of the new uniform.
-void get_ubo_aligned_offset(uint32_t* uniformOffset,
-                            uint32_t* currentOffset,
-                            GrSLType type,
-                            int arrayCount) {
-    uint32_t alignmentMask = grsltype_to_alignment_mask(type);
-    uint32_t offsetDiff = *currentOffset & alignmentMask;
-    if (offsetDiff != 0) {
-        offsetDiff = alignmentMask - offsetDiff + 1;
-    }
-    *uniformOffset = *currentOffset + offsetDiff;
-    SkASSERT(sizeof(float) == 4);
-    // We use a 0 arrayCount to indicate it is not an array type but we still need to count the one
-    // object.
-    int count = arrayCount ? arrayCount : 1;
-    *currentOffset = *uniformOffset + count * (uint32_t)GrSLTypeSize(type);
-}
-
-GrGLSLUniformHandler::UniformHandle GrVkUniformHandler::internalAddUniformArray(
-                                                                            uint32_t visibility,
-                                                                            GrSLType type,
-                                                                            GrSLPrecision precision,
-                                                                            const char* name,
-                                                                            bool mangleName,
-                                                                            int arrayCount,
-                                                                            const char** outName) {
-    SkASSERT(name && strlen(name));
-    SkDEBUGCODE(static const uint32_t kVisibilityMask = kVertex_GrShaderFlag|kFragment_GrShaderFlag);
-    SkASSERT(0 == (~kVisibilityMask & visibility));
-    SkASSERT(0 != visibility);
-    SkASSERT(kDefault_GrSLPrecision == precision || GrSLTypeIsFloatType(type));
-
-    UniformInfo& uni = fUniforms.push_back();
-    uni.fVariable.setType(type);
-    // TODO this is a bit hacky, lets think of a better way.  Basically we need to be able to use
-    // the uniform view matrix name in the GP, and the GP is immutable so it has to tell the PB
-    // exactly what name it wants to use for the uniform view matrix.  If we prefix anythings, then
-    // the names will mismatch.  I think the correct solution is to have all GPs which need the
-    // uniform view matrix, they should upload the view matrix in their setData along with regular
-    // uniforms.
-    char prefix = 'u';
-    if ('u' == name[0]) {
-        prefix = '\0';
-    }
-    fProgramBuilder->nameVariable(uni.fVariable.accessName(), prefix, name, mangleName);
-    uni.fVariable.setArrayCount(arrayCount);
-    // For now asserting the the visibility is either only vertex or only fragment
-    SkASSERT(kVertex_GrShaderFlag == visibility || kFragment_GrShaderFlag == visibility);
-    uni.fVisibility = visibility;
-    uni.fVariable.setPrecision(precision);
-    if (GrSLTypeIsFloatType(type)) {
-        // When outputing the GLSL, only the outer uniform block will get the Uniform modifier. Thus
-        // we set the modifier to none for all uniforms declared inside the block.
-        uni.fVariable.setTypeModifier(GrGLSLShaderVar::kNone_TypeModifier);
-
-        uint32_t* currentOffset = kVertex_GrShaderFlag == visibility ? &fCurrentVertexUBOOffset
-                                                                     : &fCurrentFragmentUBOOffset;
-        get_ubo_aligned_offset(&uni.fUBOffset, currentOffset, type, arrayCount);
-        uni.fSetNumber = kUniformBufferDescSet;
-        uni.fBinding = kVertex_GrShaderFlag == visibility ? kVertexBinding : kFragBinding;
-
-        if (outName) {
-            *outName = uni.fVariable.c_str();
-        }
-    } else {
-        SkASSERT(type == kSampler2D_GrSLType);
-        uni.fVariable.setTypeModifier(GrGLSLShaderVar::kUniform_TypeModifier);
-
-        uni.fSetNumber = kSamplerDescSet;
-        uni.fBinding = fCurrentSamplerBinding++;
-        uni.fUBOffset = 0; // This value will be ignored, but initializing to avoid any errors.
-        SkString layoutQualifier;
-        layoutQualifier.appendf("set=%d, binding=%d", uni.fSetNumber, uni.fBinding);
-        uni.fVariable.setLayoutQualifier(layoutQualifier.c_str());
-    }
-
-    return GrGLSLUniformHandler::UniformHandle(fUniforms.count() - 1);
-}
-
-void GrVkUniformHandler::appendUniformDecls(GrShaderFlags visibility, SkString* out) const {
-    SkTArray<UniformInfo*> uniformBufferUniform;
-    // Used to collect all the variables that will be place inside the uniform buffer
-    SkString uniformsString;
-    SkASSERT(kVertex_GrShaderFlag == visibility || kFragment_GrShaderFlag == visibility);
-    uint32_t uniformBinding = (visibility == kVertex_GrShaderFlag) ? kVertexBinding : kFragBinding;
-    for (int i = 0; i < fUniforms.count(); ++i) {
-        const UniformInfo& localUniform = fUniforms[i];
-        if (visibility == localUniform.fVisibility) {
-            if (GrSLTypeIsFloatType(localUniform.fVariable.getType())) {
-                SkASSERT(uniformBinding == localUniform.fBinding);
-                SkASSERT(kUniformBufferDescSet == localUniform.fSetNumber);
-                localUniform.fVariable.appendDecl(fProgramBuilder->glslCaps(), &uniformsString);
-                uniformsString.append(";\n");
-            } else {
-                SkASSERT(localUniform.fVariable.getType() == kSampler2D_GrSLType);
-                SkASSERT(kSamplerDescSet == localUniform.fSetNumber);
-                localUniform.fVariable.appendDecl(fProgramBuilder->glslCaps(), out);
-                out->append(";\n");
-            }
-        }
-    }
-    if (!uniformsString.isEmpty()) {
-        const char* stage = (visibility == kVertex_GrShaderFlag) ? "vertex" : "fragment";
-        out->appendf("layout (set=%d, binding=%d) uniform %sUniformBuffer\n{\n",
-                     kUniformBufferDescSet, uniformBinding, stage);
-        out->appendf("%s\n};\n", uniformsString.c_str());
-    }
-}