| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/sksl/SkSLCPPUniformCTypes.h" |
| |
| #include "include/private/SkMutex.h" |
| #include "src/sksl/SkSLStringStream.h" |
| #include "src/sksl/codegen/SkSLHCodeGenerator.h" |
| |
| #include <map> |
| #include <vector> |
| |
| #if defined(SKSL_STANDALONE) || GR_TEST_UTILS |
| |
| namespace SkSL { |
| |
| ///////////////////////// |
| // Template evaluation // |
| ///////////////////////// |
| |
| static String eval_template(const String& format, |
| std::initializer_list<String> tokens, |
| std::initializer_list<String> replacements) { |
| SkASSERT(tokens.size() == replacements.size()); |
| String str = format; |
| |
| // Replace every token with its replacement. |
| auto tokenIter = tokens.begin(); |
| auto replacementIter = replacements.begin(); |
| for (; tokenIter != tokens.end(); ++tokenIter, ++replacementIter) { |
| size_t position = 0; |
| for (;;) { |
| // Replace one instance of the current token with the requested replacement. |
| position = str.find(*tokenIter, position); |
| if (position == String::npos) { |
| break; |
| } |
| str.replace(position, tokenIter->size(), *replacementIter); |
| position += replacementIter->size(); |
| } |
| } |
| |
| return str; |
| } |
| |
| static bool determine_inline_from_template(const String& uniformTemplate) { |
| // True if there is at most one instance of the ${var} template matcher in fUniformTemplate. |
| int firstMatch = uniformTemplate.find("${var}"); |
| |
| if (firstMatch < 0) { |
| // Template doesn't use the value variable at all, so it can "inlined" |
| return true; |
| } |
| |
| // Check for another occurrence of ${var}, after firstMatch + 6 |
| int secondMatch = uniformTemplate.find("${var}", firstMatch + strlen("${var}")); |
| // If there's no second match, then the value can be inlined in the c++ code |
| return secondMatch < 0; |
| } |
| |
| /////////////////////////////////////// |
| // UniformCTypeMapper implementation // |
| /////////////////////////////////////// |
| |
| String UniformCTypeMapper::dirtyExpression(const String& newVar, const String& oldVar) const { |
| return eval_template(fDirtyExpressionTemplate, {"${newVar}", "${oldVar}"}, {newVar, oldVar}); |
| } |
| |
| String UniformCTypeMapper::saveState(const String& newVar, const String& oldVar) const { |
| return eval_template(fSaveStateTemplate, {"${newVar}", "${oldVar}"}, {newVar, oldVar}); |
| } |
| |
| String UniformCTypeMapper::setUniform(const String& pdman, const String& uniform, |
| const String& var) const { |
| String count; |
| String finalVar; |
| const String* activeTemplate; |
| if (fArrayCount != -1) { |
| count = to_string(fArrayCount); |
| finalVar = var + "[0]"; |
| activeTemplate = &fUniformArrayTemplate; |
| } else { |
| count = "1"; |
| finalVar = std::move(var); |
| activeTemplate = &fUniformSingleTemplate; |
| } |
| |
| return eval_template(*activeTemplate, |
| {"${pdman}", "${uniform}", "${var}", "${count}"}, |
| {pdman, uniform, finalVar, count}); |
| } |
| |
| UniformCTypeMapper::UniformCTypeMapper( |
| Layout::CType ctype, const std::vector<String>& skslTypes, |
| const String& setUniformSingleFormat, const String& setUniformArrayFormat, |
| const String& defaultValue, const String& dirtyExpressionFormat, |
| const String& saveStateFormat) |
| : fCType(ctype) |
| , fSKSLTypes(skslTypes) |
| , fUniformSingleTemplate(setUniformSingleFormat) |
| , fUniformArrayTemplate(setUniformArrayFormat) |
| , fInlineValue(determine_inline_from_template(setUniformSingleFormat) && |
| determine_inline_from_template(setUniformArrayFormat)) |
| , fDefaultValue(defaultValue) |
| , fDirtyExpressionTemplate(dirtyExpressionFormat) |
| , fSaveStateTemplate(saveStateFormat) {} |
| |
| const UniformCTypeMapper* UniformCTypeMapper::arrayMapper(int count) const { |
| static SkMutex& mutex = *(new SkMutex); |
| SkAutoMutexExclusive guard(mutex); |
| using Key = std::pair<const UniformCTypeMapper*, int>; |
| static std::map<Key, UniformCTypeMapper> registered; |
| Key key(this, count); |
| auto result = registered.find(key); |
| if (result == registered.end()) { |
| auto [iter, didInsert] = registered.insert({key, *this}); |
| SkASSERT(didInsert); |
| UniformCTypeMapper* inserted = &iter->second; |
| inserted->fArrayCount = count; |
| return inserted; |
| } |
| return &result->second; |
| } |
| |
| |
| static UniformCTypeMapper register_array(Layout::CType ctype, const std::vector<String>& skslTypes, |
| const char* singleSet, const char* arraySet, |
| const char* defaultValue, const char* dirtyExpression) { |
| return UniformCTypeMapper(ctype, skslTypes, singleSet, arraySet, defaultValue, dirtyExpression, |
| "${oldVar} = ${newVar}"); |
| } |
| |
| static UniformCTypeMapper register_array(Layout::CType ctype, const std::vector<String>& skslTypes, |
| const char* singleSet, const char* arraySet, |
| const char* defaultValue) { |
| return register_array(ctype, skslTypes, singleSet, arraySet, defaultValue, |
| "${oldVar} != ${newVar}"); |
| } |
| |
| static UniformCTypeMapper register_type(Layout::CType ctype, const std::vector<String>& skslTypes, |
| const char* uniformFormat, const char* defaultValue, |
| const char* dirtyExpression) { |
| return register_array(ctype, skslTypes, uniformFormat, uniformFormat, defaultValue, |
| dirtyExpression); |
| } |
| |
| static UniformCTypeMapper register_type(Layout::CType ctype, const std::vector<String>& skslTypes, |
| const char* uniformFormat, const char* defaultValue) { |
| return register_array(ctype, skslTypes, uniformFormat, uniformFormat, defaultValue); |
| } |
| |
| ////////////////////////////// |
| // Currently defined ctypes // |
| ////////////////////////////// |
| |
| static const std::vector<UniformCTypeMapper>& get_mappers() { |
| static const auto& kRegisteredMappers = *new std::vector<UniformCTypeMapper>{ |
| register_type(Layout::CType::kSkRect, { "half4", "float4", "double4" }, |
| "${pdman}.set4fv(${uniform}, ${count}, reinterpret_cast<const float*>(&${var}))", // to gpu |
| "SkRect::MakeEmpty()", // default value |
| "${oldVar}.isEmpty() || ${oldVar} != ${newVar}"), // dirty check |
| |
| register_type(Layout::CType::kSkIRect, { "int4", "short4", "byte4" }, |
| "${pdman}.set4iv(${uniform}, ${count}, reinterpret_cast<const int*>(&${var}))", // to gpu |
| "SkIRect::MakeEmpty()", // default value |
| "${oldVar}.isEmpty() || ${oldVar} != ${newVar}"), // dirty check |
| |
| register_type(Layout::CType::kSkPMColor4f, { "half4", "float4", "double4" }, |
| "${pdman}.set4fv(${uniform}, ${count}, ${var}.vec())", // to gpu |
| "{SK_FloatNaN, SK_FloatNaN, SK_FloatNaN, SK_FloatNaN}"), // default value |
| |
| register_type(Layout::CType::kSkV4, { "half4", "float4", "double4" }, |
| "${pdman}.set4fv(${uniform}, ${count}, ${var}.ptr())", // to gpu |
| "SkV4{SK_FloatNaN, SK_FloatNaN, SK_FloatNaN, SK_FloatNaN}", // default value |
| "${oldVar} != (${newVar})"), // dirty check |
| |
| register_array(Layout::CType::kSkPoint, { "half2", "float2", "double2" } , |
| "${pdman}.set2f(${uniform}, ${var}.fX, ${var}.fY)", // single |
| "${pdman}.set2fv(${uniform}, ${count}, &${var}.fX)", // array |
| "SkPoint::Make(SK_FloatNaN, SK_FloatNaN)"), // default value |
| |
| register_array(Layout::CType::kSkIPoint, { "int2", "short2", "byte2" }, |
| "${pdman}.set2i(${uniform}, ${var}.fX, ${var}.fY)", // single |
| "${pdman}.set2iv(${uniform}, ${count}, ${var}.fX, ${var}.fY)", // array |
| "SkIPoint::Make(SK_NaN32, SK_NaN32)"), // default value |
| |
| register_type(Layout::CType::kSkMatrix, { "half3x3", "float3x3", "double3x3" }, |
| "static_assert(${count} == 1); ${pdman}.setSkMatrix(${uniform}, ${var})", // to gpu |
| "SkMatrix::Scale(SK_FloatNaN, SK_FloatNaN)", // default value |
| "!${oldVar}.cheapEqualTo(${newVar})"), // dirty check |
| |
| register_type(Layout::CType::kSkM44, { "half4x4", "float4x4", "double4x4" }, |
| "static_assert(${count} == 1); ${pdman}.setSkM44(${uniform}, ${var})", // to gpu |
| "SkM44(SkM44::kNaN_Constructor)", // default value |
| "${oldVar} != (${newVar})"), // dirty check |
| |
| register_array(Layout::CType::kFloat, { "half", "float", "double" }, |
| "${pdman}.set1f(${uniform}, ${var})", // single |
| "${pdman}.set1fv(${uniform}, ${count}, &${var})", // array |
| "SK_FloatNaN"), // default value |
| |
| register_array(Layout::CType::kInt32, { "int", "short", "byte" }, |
| "${pdman}.set1i(${uniform}, ${var})", // single |
| "${pdman}.set1iv(${uniform}, ${count}, &${var})", // array |
| "SK_NaN32"), // default value |
| }; |
| |
| return kRegisteredMappers; |
| } |
| |
| ///// |
| |
| // Greedy search through registered handlers for one that has a matching |
| // ctype and supports the sksl type of the variable. |
| const UniformCTypeMapper* UniformCTypeMapper::Get(const Context& context, const Type& type, |
| const Layout& layout) { |
| if (type.isArray()) { |
| const UniformCTypeMapper* base = Get(context, type.componentType(), layout); |
| return base ? base->arrayMapper(type.columns()) : nullptr; |
| } |
| const std::vector<UniformCTypeMapper>& registeredMappers = get_mappers(); |
| |
| Layout::CType ctype = layout.fCType; |
| // If there's no custom ctype declared in the layout, use the default type mapping |
| if (ctype == Layout::CType::kDefault) { |
| ctype = HCodeGenerator::ParameterCType(context, type, layout); |
| } |
| |
| for (const UniformCTypeMapper& mapper : registeredMappers) { |
| if (mapper.ctype() == ctype) { |
| // Check for SkSL support, since some C types (e.g. SkMatrix) can be used in multiple |
| // uniform types and send data to the GPU differently depending on the uniform type. |
| for (const String& mapperSupportedType : mapper.supportedTypeNames()) { |
| if (mapperSupportedType == type.name()) { |
| // Return the match that we found. |
| return &mapper; |
| } |
| } |
| } |
| } |
| |
| // Didn't find a match. |
| return nullptr; |
| } |
| |
| } // namespace SkSL |
| |
| #endif // defined(SKSL_STANDALONE) || GR_TEST_UTILS |
