From: Brian Paul Date: Tue, 22 Jul 2008 21:17:10 +0000 (-0600) Subject: mesa: glsl: implement constructor functions for user-defined types X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7af8dddf2705cf0e2c02154615900bf49c8ee25a;p=mesa.git mesa: glsl: implement constructor functions for user-defined types --- diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c index 88614cb0333..803501e1541 100644 --- a/src/mesa/shader/slang/slang_codegen.c +++ b/src/mesa/shader/slang/slang_codegen.c @@ -1702,6 +1702,167 @@ _slang_first_function(struct slang_function_scope_ *scope, const char *name) } +/** + * Generate a new slang_function which is a constructor for a user-defined + * struct type. + */ +static slang_function * +_slang_make_constructor(slang_assemble_ctx *A, slang_struct *str) +{ + const GLint numFields = str->fields->num_variables; + + slang_function *fun = (slang_function *) _mesa_malloc(sizeof(slang_function)); + if (!fun) + return NULL; + + slang_function_construct(fun); + + /* function header (name, return type) */ + fun->kind = SLANG_FUNC_CONSTRUCTOR; + fun->header.a_name = str->a_name; + fun->header.type.qualifier = SLANG_QUAL_NONE; + fun->header.type.specifier.type = SLANG_SPEC_STRUCT; + fun->header.type.specifier._struct = str; + + /* function parameters (= struct's fields) */ + { + GLint i; + for (i = 0; i < numFields; i++) { + /* + printf("Field %d: %s\n", i, (char*) str->fields->variables[i]->a_name); + */ + slang_variable *p = slang_variable_scope_grow(fun->parameters); + *p = *str->fields->variables[i]; + } + fun->param_count = fun->parameters->num_variables; + } + + /* Add __retVal to params */ + { + slang_variable *p = slang_variable_scope_grow(fun->parameters); + slang_atom a_retVal = slang_atom_pool_atom(A->atoms, "__retVal"); + assert(a_retVal); + p->a_name = a_retVal; + p->type = fun->header.type; + p->type.qualifier = SLANG_QUAL_OUT; + fun->param_count++; + } + + /* function body is: + * block: + * declare T; + * T.f1 = p1; + * T.f2 = p2; + * ... + * T.fn = pn; + * return T; + */ + { + slang_variable *var; + GLint i; + + fun->body = slang_operation_new(1); + fun->body->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE; + fun->body->num_children = numFields + 2; + fun->body->children = slang_operation_new(numFields + 2); + + /* create local var 't' */ + var = slang_variable_scope_grow(fun->parameters); + var->a_name = slang_atom_pool_atom(A->atoms, "t"); + var->type = fun->header.type; + + /* declare t */ + { + slang_operation *decl; + + decl = &fun->body->children[0]; + decl->type = SLANG_OPER_VARIABLE_DECL; + decl->locals = _slang_variable_scope_new(fun->parameters); + decl->a_id = var->a_name; + } + + /* assign params to fields of t */ + for (i = 0; i < numFields; i++) { + slang_operation *assign = &fun->body->children[1 + i]; + + assign->type = SLANG_OPER_ASSIGN; + assign->locals = _slang_variable_scope_new(fun->parameters); + assign->num_children = 2; + assign->children = slang_operation_new(2); + + { + slang_operation *lhs = &assign->children[0]; + + lhs->type = SLANG_OPER_FIELD; + lhs->locals = _slang_variable_scope_new(fun->parameters); + lhs->num_children = 1; + lhs->children = slang_operation_new(1); + lhs->a_id = str->fields->variables[i]->a_name; + + lhs->children[0].type = SLANG_OPER_IDENTIFIER; + lhs->children[0].a_id = var->a_name; + lhs->children[0].locals = _slang_variable_scope_new(fun->parameters); + +#if 0 + lhs->children[1].num_children = 1; + lhs->children[1].children = slang_operation_new(1); + lhs->children[1].children[0].type = SLANG_OPER_IDENTIFIER; + lhs->children[1].children[0].a_id = str->fields->variables[i]->a_name; + lhs->children[1].children->locals = _slang_variable_scope_new(fun->parameters); +#endif + } + + { + slang_operation *rhs = &assign->children[1]; + + rhs->type = SLANG_OPER_IDENTIFIER; + rhs->locals = _slang_variable_scope_new(fun->parameters); + rhs->a_id = str->fields->variables[i]->a_name; + } + } + + /* return t; */ + { + slang_operation *ret = &fun->body->children[numFields + 1]; + + ret->type = SLANG_OPER_RETURN; + ret->locals = _slang_variable_scope_new(fun->parameters); + ret->num_children = 1; + ret->children = slang_operation_new(1); + ret->children[0].type = SLANG_OPER_IDENTIFIER; + ret->children[0].a_id = var->a_name; + ret->children[0].locals = _slang_variable_scope_new(fun->parameters); + + } + } + /* + slang_print_function(fun, 1); + */ + return fun; +} + + +/** + * Find/create a function (constructor) for the given structure name. + */ +static slang_function * +_slang_locate_struct_constructor(slang_assemble_ctx *A, const char *name) +{ + int i; + for (i = 0; i < A->space.structs->num_structs; i++) { + slang_struct *str = &A->space.structs->structs[i]; + if (strcmp(name, (const char *) str->a_name) == 0) { + /* found a structure type that matches the function name */ + if (!str->constructor) { + /* create the constructor function now */ + str->constructor = _slang_make_constructor(A, str); + } + return str->constructor; + } + } + return NULL; +} + /** * Assemble a function call, given a particular function name. @@ -1725,6 +1886,11 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name, */ fun = _slang_locate_function(A->space.funcs, atom, params, param_count, &A->space, A->atoms, A->log); + + if (!fun) { + fun = _slang_locate_struct_constructor(A, name); + } + if (!fun) { /* A function with exactly the right parameters/types was not found. * Try adapting the parameters. diff --git a/src/mesa/shader/slang/slang_compile_struct.h b/src/mesa/shader/slang/slang_compile_struct.h index 79e63066168..90c5512f4d3 100644 --- a/src/mesa/shader/slang/slang_compile_struct.h +++ b/src/mesa/shader/slang/slang_compile_struct.h @@ -29,11 +29,13 @@ extern "C" { #endif +struct slang_function_; + typedef struct slang_struct_scope_ { - struct slang_struct_ *structs; + struct slang_struct_ *structs; GLuint num_structs; - struct slang_struct_scope_ *outer_scope; + struct slang_struct_scope_ *outer_scope; } slang_struct_scope; extern GLvoid @@ -45,9 +47,10 @@ struct slang_struct_ *slang_struct_scope_find (slang_struct_scope *, slang_atom, typedef struct slang_struct_ { - slang_atom a_name; - struct slang_variable_scope_ *fields; - slang_struct_scope *structs; + slang_atom a_name; + struct slang_variable_scope_ *fields; + slang_struct_scope *structs; + struct slang_function_ *constructor; } slang_struct; int slang_struct_construct (slang_struct *);