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