void TranslatorGLSL::initBuiltInFunctionEmulator(BuiltInFunctionEmulator *emu, int compileOptions)
{
if (compileOptions & SH_EMULATE_BUILT_IN_FUNCTIONS)
{
InitBuiltInFunctionEmulatorForGLSLWorkarounds(emu, getShaderType());
}
int targetGLSLVersion = ShaderOutputTypeToGLSLVersion(getOutputType());
InitBuiltInFunctionEmulatorForGLSLMissingFunctions(emu, getShaderType(), targetGLSLVersion);
}
// We need to scan for the following:
// 1. "invariant" keyword: This can occur in both - vertex and fragment shaders
// but only at the global scope.
// 2. "gl_PointCoord" built-in variable: This can only occur in fragment shader
// but inside any scope.
// 3. Call to a matrix constructor with another matrix as argument.
// (These constructors were reserved in GLSL version 1.10.)
// 4. Arrays as "out" function parameters.
// GLSL spec section 6.1.1: "When calling a function, expressions that do
// not evaluate to l-values cannot be passed to parameters declared as
// out or inout."
// GLSL 1.1 section 5.8: "Other binary or unary expressions,
// non-dereferenced arrays, function names, swizzles with repeated fields,
// and constants cannot be l-values."
// GLSL 1.2 relaxed the restriction on arrays, section 5.8: "Variables that
// are built-in types, entire structures or arrays... are all l-values."
//
TVersionGLSL::TVersionGLSL(sh::GLenum type,
const TPragma &pragma,
ShShaderOutput output)
: TIntermTraverser(true, false, false)
{
mVersion = ShaderOutputTypeToGLSLVersion(output);
if (pragma.stdgl.invariantAll)
{
ensureVersionIsAtLeast(GLSL_VERSION_120);
}
}
void TranslatorGLSL::initBuiltInFunctionEmulator(BuiltInFunctionEmulator *emu,
ShCompileOptions compileOptions)
{
if (compileOptions & SH_EMULATE_ABS_INT_FUNCTION)
{
InitBuiltInAbsFunctionEmulatorForGLSLWorkarounds(emu, getShaderType());
}
if (compileOptions & SH_EMULATE_ISNAN_FLOAT_FUNCTION)
{
InitBuiltInIsnanFunctionEmulatorForGLSLWorkarounds(emu, getShaderVersion());
}
int targetGLSLVersion = ShaderOutputTypeToGLSLVersion(getOutputType());
InitBuiltInFunctionEmulatorForGLSLMissingFunctions(emu, getShaderType(), targetGLSLVersion);
}
TExtensionGLSL::TExtensionGLSL(ShShaderOutput output)
: TIntermTraverser(true, false, false), mTargetVersion(ShaderOutputTypeToGLSLVersion(output))
{
}
void TranslatorGLSL::initBuiltInFunctionEmulator(BuiltInFunctionEmulator *emu, int compileOptions)
{
int targetGLSLVersion = ShaderOutputTypeToGLSLVersion(getOutputType());
InitBuiltInFunctionEmulatorForGLSLMissingFunctions(emu, getShaderType(), targetGLSLVersion);
}
