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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SKSL_UTIL
- #define SKSL_UTIL
- #include <cstdarg>
- #include <memory>
- #include "stdlib.h"
- #include "string.h"
- #include "src/sksl/SkSLDefines.h"
- #include "src/sksl/SkSLLexer.h"
- #ifndef SKSL_STANDALONE
- #include "include/core/SkTypes.h"
- #if SK_SUPPORT_GPU
- #include "include/gpu/GrContextOptions.h"
- #include "src/gpu/GrShaderCaps.h"
- #endif // SK_SUPPORT_GPU
- #endif // SKSL_STANDALONE
- class GrShaderCaps;
- namespace SkSL {
- class OutputStream;
- class StringStream;
- #if defined(SKSL_STANDALONE) || !SK_SUPPORT_GPU
- // we're being compiled standalone, so we don't have access to caps...
- enum GrGLSLGeneration {
- k110_GrGLSLGeneration,
- k130_GrGLSLGeneration,
- k140_GrGLSLGeneration,
- k150_GrGLSLGeneration,
- k330_GrGLSLGeneration,
- k400_GrGLSLGeneration,
- k420_GrGLSLGeneration,
- k310es_GrGLSLGeneration,
- k320es_GrGLSLGeneration,
- };
- #define SKSL_CAPS_CLASS StandaloneShaderCaps
- class StandaloneShaderCaps {
- public:
- GrGLSLGeneration generation() const {
- return k400_GrGLSLGeneration;
- }
- bool atan2ImplementedAsAtanYOverX() const {
- return false;
- }
- bool canUseMinAndAbsTogether() const {
- return true;
- }
- bool mustForceNegatedAtanParamToFloat() const {
- return false;
- }
- bool shaderDerivativeSupport() const {
- return true;
- }
- bool usesPrecisionModifiers() const {
- return true;
- }
- bool mustDeclareFragmentShaderOutput() const {
- return true;
- }
- bool fbFetchSupport() const {
- return true;
- }
- bool fbFetchNeedsCustomOutput() const {
- return false;
- }
- bool flatInterpolationSupport() const {
- return true;
- }
- bool noperspectiveInterpolationSupport() const {
- return true;
- }
- bool multisampleInterpolationSupport() const {
- return true;
- }
- bool sampleVariablesSupport() const {
- return true;
- }
- bool externalTextureSupport() const {
- return true;
- }
- bool mustDoOpBetweenFloorAndAbs() const {
- return false;
- }
- bool mustEnableAdvBlendEqs() const {
- return false;
- }
- bool mustEnableSpecificAdvBlendEqs() const {
- return false;
- }
- bool canUseAnyFunctionInShader() const {
- return false;
- }
- bool floatIs32Bits() const {
- return true;
- }
- bool integerSupport() const {
- return false;
- }
- bool builtinFMASupport() const {
- return true;
- }
- const char* shaderDerivativeExtensionString() const {
- return nullptr;
- }
- const char* fragCoordConventionsExtensionString() const {
- return nullptr;
- }
- const char* geometryShaderExtensionString() const {
- return nullptr;
- }
- const char* gsInvocationsExtensionString() const {
- return nullptr;
- }
- const char* externalTextureExtensionString() const {
- return nullptr;
- }
- const char* secondExternalTextureExtensionString() const {
- return nullptr;
- }
- const char* versionDeclString() const {
- return "";
- }
- bool gsInvocationsSupport() const {
- return true;
- }
- bool canUseFractForNegativeValues() const {
- return true;
- }
- bool canUseFragCoord() const {
- return true;
- }
- bool incompleteShortIntPrecision() const {
- return false;
- }
- bool addAndTrueToLoopCondition() const {
- return false;
- }
- bool unfoldShortCircuitAsTernary() const {
- return false;
- }
- bool emulateAbsIntFunction() const {
- return false;
- }
- bool rewriteDoWhileLoops() const {
- return false;
- }
- bool removePowWithConstantExponent() const {
- return false;
- }
- const char* fbFetchColorName() const {
- return nullptr;
- }
- };
- extern StandaloneShaderCaps standaloneCaps;
- #else
- #define SKSL_CAPS_CLASS GrShaderCaps
- // Various sets of caps for use in tests
- class ShaderCapsFactory {
- public:
- static sk_sp<GrShaderCaps> Default() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fShaderDerivativeSupport = true;
- return result;
- }
- static sk_sp<GrShaderCaps> Version450Core() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 450 core";
- return result;
- }
- static sk_sp<GrShaderCaps> Version110() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 110";
- result->fGLSLGeneration = GrGLSLGeneration::k110_GrGLSLGeneration;
- return result;
- }
- static sk_sp<GrShaderCaps> UsesPrecisionModifiers() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fUsesPrecisionModifiers = true;
- return result;
- }
- static sk_sp<GrShaderCaps> CannotUseMinAndAbsTogether() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fCanUseMinAndAbsTogether = false;
- return result;
- }
- static sk_sp<GrShaderCaps> CannotUseFractForNegativeValues() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fCanUseFractForNegativeValues = false;
- return result;
- }
- static sk_sp<GrShaderCaps> MustForceNegatedAtanParamToFloat() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fMustForceNegatedAtanParamToFloat = true;
- return result;
- }
- static sk_sp<GrShaderCaps> ShaderDerivativeExtensionString() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fShaderDerivativeSupport = true;
- result->fShaderDerivativeExtensionString = "GL_OES_standard_derivatives";
- result->fUsesPrecisionModifiers = true;
- return result;
- }
- static sk_sp<GrShaderCaps> FragCoordsOld() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 110";
- result->fGLSLGeneration = GrGLSLGeneration::k110_GrGLSLGeneration;
- result->fFragCoordConventionsExtensionString = "GL_ARB_fragment_coord_conventions";
- return result;
- }
- static sk_sp<GrShaderCaps> FragCoordsNew() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fFragCoordConventionsExtensionString = "GL_ARB_fragment_coord_conventions";
- return result;
- }
- static sk_sp<GrShaderCaps> GeometryShaderSupport() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fGeometryShaderSupport = true;
- result->fGSInvocationsSupport = true;
- return result;
- }
- static sk_sp<GrShaderCaps> NoGSInvocationsSupport() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fGeometryShaderSupport = true;
- result->fGSInvocationsSupport = false;
- return result;
- }
- static sk_sp<GrShaderCaps> GeometryShaderExtensionString() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 310es";
- result->fGeometryShaderSupport = true;
- result->fGeometryShaderExtensionString = "GL_EXT_geometry_shader";
- result->fGSInvocationsSupport = true;
- return result;
- }
- static sk_sp<GrShaderCaps> GSInvocationsExtensionString() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fGeometryShaderSupport = true;
- result->fGSInvocationsSupport = true;
- result->fGSInvocationsExtensionString = "GL_ARB_gpu_shader5";
- return result;
- }
- static sk_sp<GrShaderCaps> VariousCaps() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fExternalTextureSupport = true;
- result->fFBFetchSupport = false;
- result->fCanUseAnyFunctionInShader = false;
- return result;
- }
- static sk_sp<GrShaderCaps> CannotUseFragCoord() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fCanUseFragCoord = false;
- return result;
- }
- static sk_sp<GrShaderCaps> IncompleteShortIntPrecision() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 310es";
- result->fUsesPrecisionModifiers = true;
- result->fIncompleteShortIntPrecision = true;
- return result;
- }
- static sk_sp<GrShaderCaps> AddAndTrueToLoopCondition() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fAddAndTrueToLoopCondition = true;
- return result;
- }
- static sk_sp<GrShaderCaps> UnfoldShortCircuitAsTernary() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fUnfoldShortCircuitAsTernary = true;
- return result;
- }
- static sk_sp<GrShaderCaps> EmulateAbsIntFunction() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fEmulateAbsIntFunction = true;
- return result;
- }
- static sk_sp<GrShaderCaps> RewriteDoWhileLoops() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fRewriteDoWhileLoops = true;
- return result;
- }
- static sk_sp<GrShaderCaps> RemovePowWithConstantExponent() {
- sk_sp<GrShaderCaps> result = sk_make_sp<GrShaderCaps>(GrContextOptions());
- result->fVersionDeclString = "#version 400";
- result->fRemovePowWithConstantExponent = true;
- return result;
- }
- };
- #endif
- void write_stringstream(const StringStream& d, OutputStream& out);
- // Returns true if op is '=' or any compound assignment operator ('+=', '-=', etc.)
- bool is_assignment(Token::Kind op);
- // Given a compound assignment operator, returns the non-assignment version of the operator (e.g.
- // '+=' becomes '+')
- Token::Kind remove_assignment(Token::Kind op);
- NORETURN void sksl_abort();
- } // namespace
- #endif
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