diff options
Diffstat (limited to 'src/mesa/shader/slang/slang_typeinfo.c')
| -rw-r--r-- | src/mesa/shader/slang/slang_typeinfo.c | 877 |
1 files changed, 877 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/slang_typeinfo.c b/src/mesa/shader/slang/slang_typeinfo.c new file mode 100644 index 0000000000..bbcc1c740c --- /dev/null +++ b/src/mesa/shader/slang/slang_typeinfo.c @@ -0,0 +1,877 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** + * \file slang_assemble_typeinfo.c + * slang type info + * \author Michal Krol + */ + +#include "imports.h" +#include "slang_typeinfo.h" +#include "slang_compile.h" +#include "slang_error.h" +#include "prog_instruction.h" + + + + +/** + * Checks if a field selector is a general swizzle (an r-value swizzle + * with replicated components or an l-value swizzle mask) for a + * vector. Returns GL_TRUE if this is the case, <swz> is filled with + * swizzle information. Returns GL_FALSE otherwise. + */ +GLboolean +_slang_is_swizzle(const char *field, GLuint rows, slang_swizzle * swz) +{ + GLuint i; + GLboolean xyzw = GL_FALSE, rgba = GL_FALSE, stpq = GL_FALSE; + + /* init to undefined. + * We rely on undefined/nil values to distinguish between + * regular swizzles and writemasks. + * For example, the swizzle ".xNNN" is the writemask ".x". + * That's different than the swizzle ".xxxx". + */ + for (i = 0; i < 4; i++) + swz->swizzle[i] = SWIZZLE_NIL; + + /* the swizzle can be at most 4-component long */ + swz->num_components = slang_string_length(field); + if (swz->num_components > 4) + return GL_FALSE; + + for (i = 0; i < swz->num_components; i++) { + /* mark which swizzle group is used */ + switch (field[i]) { + case 'x': + case 'y': + case 'z': + case 'w': + xyzw = GL_TRUE; + break; + case 'r': + case 'g': + case 'b': + case 'a': + rgba = GL_TRUE; + break; + case 's': + case 't': + case 'p': + case 'q': + stpq = GL_TRUE; + break; + default: + return GL_FALSE; + } + + /* collect swizzle component */ + switch (field[i]) { + case 'x': + case 'r': + case 's': + swz->swizzle[i] = 0; + break; + case 'y': + case 'g': + case 't': + swz->swizzle[i] = 1; + break; + case 'z': + case 'b': + case 'p': + swz->swizzle[i] = 2; + break; + case 'w': + case 'a': + case 'q': + swz->swizzle[i] = 3; + break; + } + + /* check if the component is valid for given vector's row count */ + if (rows <= swz->swizzle[i]) + return GL_FALSE; + } + + /* only one swizzle group can be used */ + if ((xyzw && rgba) || (xyzw && stpq) || (rgba && stpq)) + return GL_FALSE; + + return GL_TRUE; +} + + + +/** + * Checks if a general swizzle is an l-value swizzle - these swizzles + * do not have duplicated fields. Returns GL_TRUE if this is a + * swizzle mask. Returns GL_FALSE otherwise + */ +GLboolean +_slang_is_swizzle_mask(const slang_swizzle * swz, GLuint rows) +{ + GLuint i, c = 0; + + /* the swizzle may not be longer than the vector dim */ + if (swz->num_components > rows) + return GL_FALSE; + + /* the swizzle components cannot be duplicated */ + for (i = 0; i < swz->num_components; i++) { + if ((c & (1 << swz->swizzle[i])) != 0) + return GL_FALSE; + c |= 1 << swz->swizzle[i]; + } + + return GL_TRUE; +} + + +/** + * Combines (multiplies) two swizzles to form single swizzle. + * Example: "vec.wzyx.yx" --> "vec.zw". + */ +GLvoid +_slang_multiply_swizzles(slang_swizzle * dst, const slang_swizzle * left, + const slang_swizzle * right) +{ + GLuint i; + + dst->num_components = right->num_components; + for (i = 0; i < right->num_components; i++) + dst->swizzle[i] = left->swizzle[right->swizzle[i]]; +} + + +GLvoid +slang_type_specifier_ctr(slang_type_specifier * self) +{ + self->type = SLANG_SPEC_VOID; + self->_struct = NULL; + self->_array = NULL; +} + +GLvoid +slang_type_specifier_dtr(slang_type_specifier * self) +{ + if (self->_struct != NULL) { + slang_struct_destruct(self->_struct); + slang_alloc_free(self->_struct); + } + if (self->_array != NULL) { + slang_type_specifier_dtr(self->_array); + slang_alloc_free(self->_array); + } +} + +GLboolean +slang_type_specifier_copy(slang_type_specifier * x, + const slang_type_specifier * y) +{ + slang_type_specifier z; + + slang_type_specifier_ctr(&z); + z.type = y->type; + if (z.type == SLANG_SPEC_STRUCT) { + z._struct = (slang_struct *) slang_alloc_malloc(sizeof(slang_struct)); + if (z._struct == NULL) { + slang_type_specifier_dtr(&z); + return GL_FALSE; + } + if (!slang_struct_construct(z._struct)) { + slang_alloc_free(z._struct); + slang_type_specifier_dtr(&z); + return GL_FALSE; + } + if (!slang_struct_copy(z._struct, y->_struct)) { + slang_type_specifier_dtr(&z); + return GL_FALSE; + } + } + else if (z.type == SLANG_SPEC_ARRAY) { + z._array = + (slang_type_specifier *) + slang_alloc_malloc(sizeof(slang_type_specifier)); + if (z._array == NULL) { + slang_type_specifier_dtr(&z); + return GL_FALSE; + } + slang_type_specifier_ctr(z._array); + if (!slang_type_specifier_copy(z._array, y->_array)) { + slang_type_specifier_dtr(&z); + return GL_FALSE; + } + } + slang_type_specifier_dtr(x); + *x = z; + return GL_TRUE; +} + + +/** + * Test if two types are equal. + */ +GLboolean +slang_type_specifier_equal(const slang_type_specifier * x, + const slang_type_specifier * y) +{ + if (x->type != y->type) + return GL_FALSE; + if (x->type == SLANG_SPEC_STRUCT) + return slang_struct_equal(x->_struct, y->_struct); + if (x->type == SLANG_SPEC_ARRAY) + return slang_type_specifier_equal(x->_array, y->_array); + return GL_TRUE; +} + + +/** + * As above, but allow float/int casting. + */ +static GLboolean +slang_type_specifier_compatible(const slang_type_specifier * x, + const slang_type_specifier * y) +{ + /* special case: float == int */ + if (x->type == SLANG_SPEC_INT && y->type == SLANG_SPEC_FLOAT) { + return GL_TRUE; + } + /* XXX may need to add bool/int compatibility, etc */ + + if (x->type != y->type) + return GL_FALSE; + if (x->type == SLANG_SPEC_STRUCT) + return slang_struct_equal(x->_struct, y->_struct); + if (x->type == SLANG_SPEC_ARRAY) + return slang_type_specifier_compatible(x->_array, y->_array); + return GL_TRUE; +} + + +GLboolean +slang_typeinfo_construct(slang_typeinfo * ti) +{ + slang_type_specifier_ctr(&ti->spec); + ti->array_len = 0; + return GL_TRUE; +} + +GLvoid +slang_typeinfo_destruct(slang_typeinfo * ti) +{ + slang_type_specifier_dtr(&ti->spec); +} + + +/** + * Determine the return type of a function. + * \param name name of the function + * \param params array of function parameters + * \param num_params number of parameters + * \param space namespace to use + * \param spec returns the function's type + * \param atoms atom pool + * \return GL_TRUE for success, GL_FALSE if failure + */ +static GLboolean +typeof_existing_function(const char *name, const slang_operation * params, + GLuint num_params, + const slang_name_space * space, + slang_type_specifier * spec, + slang_atom_pool * atoms) +{ + slang_atom atom; + GLboolean exists; + + atom = slang_atom_pool_atom(atoms, name); + if (!_slang_typeof_function(atom, params, num_params, space, spec, + &exists, atoms)) + return GL_FALSE; + return exists; +} + +GLboolean +_slang_typeof_operation(const slang_assemble_ctx * A, + const slang_operation * op, + slang_typeinfo * ti) +{ + return _slang_typeof_operation_(op, &A->space, ti, A->atoms); +} + + +/** + * Determine the return type of an operation. + * \param op the operation node + * \param space the namespace to use + * \param ti the returned type + * \param atoms atom pool + * \return GL_TRUE for success, GL_FALSE if failure + */ +GLboolean +_slang_typeof_operation_(const slang_operation * op, + const slang_name_space * space, + slang_typeinfo * ti, + slang_atom_pool * atoms) +{ + ti->can_be_referenced = GL_FALSE; + ti->is_swizzled = GL_FALSE; + + switch (op->type) { + case SLANG_OPER_BLOCK_NO_NEW_SCOPE: + case SLANG_OPER_BLOCK_NEW_SCOPE: + case SLANG_OPER_VARIABLE_DECL: + case SLANG_OPER_ASM: + case SLANG_OPER_BREAK: + case SLANG_OPER_CONTINUE: + case SLANG_OPER_DISCARD: + case SLANG_OPER_RETURN: + case SLANG_OPER_IF: + case SLANG_OPER_WHILE: + case SLANG_OPER_DO: + case SLANG_OPER_FOR: + case SLANG_OPER_VOID: + ti->spec.type = SLANG_SPEC_VOID; + break; + case SLANG_OPER_EXPRESSION: + case SLANG_OPER_ASSIGN: + case SLANG_OPER_ADDASSIGN: + case SLANG_OPER_SUBASSIGN: + case SLANG_OPER_MULASSIGN: + case SLANG_OPER_DIVASSIGN: + case SLANG_OPER_PREINCREMENT: + case SLANG_OPER_PREDECREMENT: + if (!_slang_typeof_operation_(op->children, space, ti, atoms)) + return GL_FALSE; + break; + case SLANG_OPER_LITERAL_BOOL: + if (op->literal_size == 1) + ti->spec.type = SLANG_SPEC_BOOL; + else if (op->literal_size == 2) + ti->spec.type = SLANG_SPEC_BVEC2; + else if (op->literal_size == 3) + ti->spec.type = SLANG_SPEC_BVEC3; + else if (op->literal_size == 4) + ti->spec.type = SLANG_SPEC_BVEC4; + else { + _mesa_problem(NULL, + "Unexpected bool literal_size %d in _slang_typeof_operation()", + op->literal_size); + ti->spec.type = SLANG_SPEC_BOOL; + } + break; + case SLANG_OPER_LOGICALOR: + case SLANG_OPER_LOGICALXOR: + case SLANG_OPER_LOGICALAND: + case SLANG_OPER_EQUAL: + case SLANG_OPER_NOTEQUAL: + case SLANG_OPER_LESS: + case SLANG_OPER_GREATER: + case SLANG_OPER_LESSequal: + case SLANG_OPER_GREATERequal: + case SLANG_OPER_NOT: + ti->spec.type = SLANG_SPEC_BOOL; + break; + case SLANG_OPER_LITERAL_INT: + if (op->literal_size == 1) + ti->spec.type = SLANG_SPEC_INT; + else if (op->literal_size == 2) + ti->spec.type = SLANG_SPEC_IVEC2; + else if (op->literal_size == 3) + ti->spec.type = SLANG_SPEC_IVEC3; + else if (op->literal_size == 4) + ti->spec.type = SLANG_SPEC_IVEC4; + else { + _mesa_problem(NULL, + "Unexpected int literal_size %d in _slang_typeof_operation()", + op->literal_size); + ti->spec.type = SLANG_SPEC_INT; + } + break; + case SLANG_OPER_LITERAL_FLOAT: + if (op->literal_size == 1) + ti->spec.type = SLANG_SPEC_FLOAT; + else if (op->literal_size == 2) + ti->spec.type = SLANG_SPEC_VEC2; + else if (op->literal_size == 3) + ti->spec.type = SLANG_SPEC_VEC3; + else if (op->literal_size == 4) + ti->spec.type = SLANG_SPEC_VEC4; + else { + _mesa_problem(NULL, + "Unexpected float literal_size %d in _slang_typeof_operation()", + op->literal_size); + ti->spec.type = SLANG_SPEC_FLOAT; + } + break; + case SLANG_OPER_IDENTIFIER: + { + slang_variable *var; + var = _slang_locate_variable(op->locals, op->a_id, GL_TRUE); + if (var == NULL) + RETURN_ERROR2("undefined variable", (char *) op->a_id, 0); + if (!slang_type_specifier_copy(&ti->spec, &var->type.specifier)) + RETURN_OUT_OF_MEMORY(); + ti->can_be_referenced = GL_TRUE; + ti->array_len = var->array_len; + } + break; + case SLANG_OPER_SEQUENCE: + /* TODO: check [0] and [1] if they match */ + if (!_slang_typeof_operation_(&op->children[1], space, ti, atoms)) + RETURN_NIL(); + ti->can_be_referenced = GL_FALSE; + ti->is_swizzled = GL_FALSE; + break; + /*case SLANG_OPER_MODASSIGN: */ + /*case SLANG_OPER_LSHASSIGN: */ + /*case SLANG_OPER_RSHASSIGN: */ + /*case SLANG_OPER_ORASSIGN: */ + /*case SLANG_OPER_XORASSIGN: */ + /*case SLANG_OPER_ANDASSIGN: */ + case SLANG_OPER_SELECT: + /* TODO: check [1] and [2] if they match */ + if (!_slang_typeof_operation_(&op->children[1], space, ti, atoms)) + RETURN_NIL(); + ti->can_be_referenced = GL_FALSE; + ti->is_swizzled = GL_FALSE; + break; + /*case SLANG_OPER_BITOR: */ + /*case SLANG_OPER_BITXOR: */ + /*case SLANG_OPER_BITAND: */ + /*case SLANG_OPER_LSHIFT: */ + /*case SLANG_OPER_RSHIFT: */ + case SLANG_OPER_ADD: + if (!typeof_existing_function("+", op->children, 2, space, + &ti->spec, atoms)) + RETURN_NIL(); + break; + case SLANG_OPER_SUBTRACT: + if (!typeof_existing_function("-", op->children, 2, space, + &ti->spec, atoms)) + RETURN_NIL(); + break; + case SLANG_OPER_MULTIPLY: + if (!typeof_existing_function("*", op->children, 2, space, + &ti->spec, atoms)) + RETURN_NIL(); + break; + case SLANG_OPER_DIVIDE: + if (!typeof_existing_function("/", op->children, 2, space, + &ti->spec, atoms)) + RETURN_NIL(); + break; + /*case SLANG_OPER_MODULUS: */ + case SLANG_OPER_PLUS: + if (!_slang_typeof_operation_(op->children, space, ti, atoms)) + RETURN_NIL(); + ti->can_be_referenced = GL_FALSE; + ti->is_swizzled = GL_FALSE; + break; + case SLANG_OPER_MINUS: + if (!typeof_existing_function("-", op->children, 1, space, + &ti->spec, atoms)) + RETURN_NIL(); + break; + /*case SLANG_OPER_COMPLEMENT: */ + case SLANG_OPER_SUBSCRIPT: + { + slang_typeinfo _ti; + + if (!slang_typeinfo_construct(&_ti)) + RETURN_NIL(); + if (!_slang_typeof_operation_(op->children, space, &_ti, atoms)) { + slang_typeinfo_destruct(&_ti); + RETURN_NIL(); + } + ti->can_be_referenced = _ti.can_be_referenced; + if (_ti.spec.type == SLANG_SPEC_ARRAY) { + if (!slang_type_specifier_copy(&ti->spec, _ti.spec._array)) { + slang_typeinfo_destruct(&_ti); + RETURN_NIL(); + } + } + else { + if (!_slang_type_is_vector(_ti.spec.type) + && !_slang_type_is_matrix(_ti.spec.type)) { + slang_typeinfo_destruct(&_ti); + RETURN_ERROR("cannot index a non-array type", 0); + } + ti->spec.type = _slang_type_base(_ti.spec.type); + } + slang_typeinfo_destruct(&_ti); + } + break; + case SLANG_OPER_CALL: + { + GLboolean exists; + + if (!_slang_typeof_function(op->a_id, op->children, op->num_children, + space, &ti->spec, &exists, atoms)) + RETURN_NIL(); + if (!exists) { + slang_struct *s = + slang_struct_scope_find(space->structs, op->a_id, GL_TRUE); + if (s != NULL) { + ti->spec.type = SLANG_SPEC_STRUCT; + ti->spec._struct = + (slang_struct *) slang_alloc_malloc(sizeof(slang_struct)); + if (ti->spec._struct == NULL) + RETURN_NIL(); + if (!slang_struct_construct(ti->spec._struct)) { + slang_alloc_free(ti->spec._struct); + ti->spec._struct = NULL; + RETURN_NIL(); + } + if (!slang_struct_copy(ti->spec._struct, s)) + RETURN_NIL(); + } + else { + const char *name; + slang_type_specifier_type type; + + name = slang_atom_pool_id(atoms, op->a_id); + type = slang_type_specifier_type_from_string(name); + if (type == SLANG_SPEC_VOID) + RETURN_ERROR2("function not found", name, 0); + ti->spec.type = type; + } + } + } + break; + case SLANG_OPER_FIELD: + { + slang_typeinfo _ti; + + if (!slang_typeinfo_construct(&_ti)) + RETURN_NIL(); + if (!_slang_typeof_operation_(op->children, space, &_ti, atoms)) { + slang_typeinfo_destruct(&_ti); + RETURN_NIL(); + } + if (_ti.spec.type == SLANG_SPEC_STRUCT) { + slang_variable *field; + + field = _slang_locate_variable(_ti.spec._struct->fields, op->a_id, + GL_FALSE); + if (field == NULL) { + slang_typeinfo_destruct(&_ti); + RETURN_NIL(); + } + if (!slang_type_specifier_copy(&ti->spec, &field->type.specifier)) { + slang_typeinfo_destruct(&_ti); + RETURN_NIL(); + } + ti->can_be_referenced = _ti.can_be_referenced; + } + else { + GLuint rows; + const char *swizzle; + slang_type_specifier_type base; + + /* determine the swizzle of the field expression */ +#if 000 + if (!_slang_type_is_vector(_ti.spec.type)) { + slang_typeinfo_destruct(&_ti); + RETURN_ERROR("Can't swizzle scalar expression", 0); + } +#endif + rows = _slang_type_dim(_ti.spec.type); + swizzle = slang_atom_pool_id(atoms, op->a_id); + if (!_slang_is_swizzle(swizzle, rows, &ti->swz)) { + slang_typeinfo_destruct(&_ti); + RETURN_ERROR("Bad swizzle", 0); + } + ti->is_swizzled = GL_TRUE; + ti->can_be_referenced = _ti.can_be_referenced + && _slang_is_swizzle_mask(&ti->swz, rows); + if (_ti.is_swizzled) { + slang_swizzle swz; + + /* swizzle the swizzle */ + _slang_multiply_swizzles(&swz, &_ti.swz, &ti->swz); + ti->swz = swz; + } + base = _slang_type_base(_ti.spec.type); + switch (ti->swz.num_components) { + case 1: + ti->spec.type = base; + break; + case 2: + switch (base) { + case SLANG_SPEC_FLOAT: + ti->spec.type = SLANG_SPEC_VEC2; + break; + case SLANG_SPEC_INT: + ti->spec.type = SLANG_SPEC_IVEC2; + break; + case SLANG_SPEC_BOOL: + ti->spec.type = SLANG_SPEC_BVEC2; + break; + default: + break; + } + break; + case 3: + switch (base) { + case SLANG_SPEC_FLOAT: + ti->spec.type = SLANG_SPEC_VEC3; + break; + case SLANG_SPEC_INT: + ti->spec.type = SLANG_SPEC_IVEC3; + break; + case SLANG_SPEC_BOOL: + ti->spec.type = SLANG_SPEC_BVEC3; + break; + default: + break; + } + break; + case 4: + switch (base) { + case SLANG_SPEC_FLOAT: + ti->spec.type = SLANG_SPEC_VEC4; + break; + case SLANG_SPEC_INT: + ti->spec.type = SLANG_SPEC_IVEC4; + break; + case SLANG_SPEC_BOOL: + ti->spec.type = SLANG_SPEC_BVEC4; + break; + default: + break; + } + break; + default: + break; + } + } + slang_typeinfo_destruct(&_ti); + } + break; + case SLANG_OPER_POSTINCREMENT: + case SLANG_OPER_POSTDECREMENT: + if (!_slang_typeof_operation_(op->children, space, ti, atoms)) + RETURN_NIL(); + ti->can_be_referenced = GL_FALSE; + ti->is_swizzled = GL_FALSE; + break; + default: + RETURN_NIL(); + } + + return GL_TRUE; +} + + +/** + * Lookup a function according to name and parameter count/types. + */ +slang_function * +_slang_locate_function(const slang_function_scope * funcs, slang_atom a_name, + const slang_operation * args, GLuint num_args, + const slang_name_space * space, slang_atom_pool * atoms) +{ + GLuint i; + + for (i = 0; i < funcs->num_functions; i++) { + slang_function *f = &funcs->functions[i]; + const GLuint haveRetValue = _slang_function_has_return_value(f); + GLuint j; + + if (a_name != f->header.a_name) + continue; + if (f->param_count - haveRetValue != num_args) + continue; + + /* compare parameter / argument types */ + for (j = 0; j < num_args; j++) { + slang_typeinfo ti; + + if (!slang_typeinfo_construct(&ti)) + return NULL; + if (!_slang_typeof_operation_(&args[j], space, &ti, atoms)) { + slang_typeinfo_destruct(&ti); + return NULL; + } + if (!slang_type_specifier_compatible(&ti.spec, + &f->parameters->variables[j]->type.specifier)) { + slang_typeinfo_destruct(&ti); + break; + } + slang_typeinfo_destruct(&ti); + + /* "out" and "inout" formal parameter requires the actual + * parameter to be l-value. + */ + if (!ti.can_be_referenced && + (f->parameters->variables[j]->type.qualifier == SLANG_QUAL_OUT || + f->parameters->variables[j]->type.qualifier == SLANG_QUAL_INOUT)) + break; + } + if (j == num_args) + return f; + } + if (funcs->outer_scope != NULL) + return _slang_locate_function(funcs->outer_scope, a_name, args, + num_args, space, atoms); + return NULL; +} + + + +/** + * Determine the return type of a function. + * \param a_name the function name + * \param param function parameters (overloading) + * \param num_params number of parameters to function + * \param space namespace to search + * \param exists returns GL_TRUE or GL_FALSE to indicate existance of function + * \return GL_TRUE for success, GL_FALSE if failure (bad function name) + */ +GLboolean +_slang_typeof_function(slang_atom a_name, const slang_operation * params, + GLuint num_params, + const slang_name_space * space, + slang_type_specifier * spec, GLboolean * exists, + slang_atom_pool * atoms) +{ + slang_function *fun = _slang_locate_function(space->funcs, a_name, params, + num_params, space, atoms); + *exists = fun != NULL; + if (!fun) + return GL_TRUE; /* yes, not false */ + return slang_type_specifier_copy(spec, &fun->header.type.specifier); +} + + + +/** + * Determine if a type is a matrix. + * \return GL_TRUE if is a matrix, GL_FALSE otherwise. + */ +GLboolean +_slang_type_is_matrix(slang_type_specifier_type ty) +{ + switch (ty) { + case SLANG_SPEC_MAT2: + case SLANG_SPEC_MAT3: + case SLANG_SPEC_MAT4: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Determine if a type is a vector. + * \return GL_TRUE if is a vector, GL_FALSE otherwise. + */ +GLboolean +_slang_type_is_vector(slang_type_specifier_type ty) +{ + switch (ty) { + case SLANG_SPEC_VEC2: + case SLANG_SPEC_VEC3: + case SLANG_SPEC_VEC4: + case SLANG_SPEC_IVEC2: + case SLANG_SPEC_IVEC3: + case SLANG_SPEC_IVEC4: + case SLANG_SPEC_BVEC2: + case SLANG_SPEC_BVEC3: + case SLANG_SPEC_BVEC4: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Given a vector type, return the type of the vector's elements + */ +slang_type_specifier_type +_slang_type_base(slang_type_specifier_type ty) +{ + switch (ty) { + case SLANG_SPEC_FLOAT: + case SLANG_SPEC_VEC2: + case SLANG_SPEC_VEC3: + case SLANG_SPEC_VEC4: + return SLANG_SPEC_FLOAT; + case SLANG_SPEC_INT: + case SLANG_SPEC_IVEC2: + case SLANG_SPEC_IVEC3: + case SLANG_SPEC_IVEC4: + return SLANG_SPEC_INT; + case SLANG_SPEC_BOOL: + case SLANG_SPEC_BVEC2: + case SLANG_SPEC_BVEC3: + case SLANG_SPEC_BVEC4: + return SLANG_SPEC_BOOL; + case SLANG_SPEC_MAT2: + return SLANG_SPEC_VEC2; + case SLANG_SPEC_MAT3: + return SLANG_SPEC_VEC3; + case SLANG_SPEC_MAT4: + return SLANG_SPEC_VEC4; + default: + return SLANG_SPEC_VOID; + } +} + + +/** + * Return the dimensionality of a vector or matrix type. + */ +GLuint +_slang_type_dim(slang_type_specifier_type ty) +{ + switch (ty) { + case SLANG_SPEC_FLOAT: + case SLANG_SPEC_INT: + case SLANG_SPEC_BOOL: + return 1; + case SLANG_SPEC_VEC2: + case SLANG_SPEC_IVEC2: + case SLANG_SPEC_BVEC2: + case SLANG_SPEC_MAT2: + return 2; + case SLANG_SPEC_VEC3: + case SLANG_SPEC_IVEC3: + case SLANG_SPEC_BVEC3: + case SLANG_SPEC_MAT3: + return 3; + case SLANG_SPEC_VEC4: + case SLANG_SPEC_IVEC4: + case SLANG_SPEC_BVEC4: + case SLANG_SPEC_MAT4: + return 4; + default: + return 0; + } +} |