obs-studio/libobs/graphics/effect-parser.c

1460 lines
35 KiB
C

/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <assert.h>
#include "effect-parser.h"
#include "effect.h"
void ep_free(struct effect_parser *ep)
{
size_t i;
for (i = 0; i < ep->params.num; i++)
ep_param_free(ep->params.array+i);
for (i = 0; i < ep->structs.num; i++)
ep_struct_free(ep->structs.array+i);
for (i = 0; i < ep->funcs.num; i++)
ep_func_free(ep->funcs.array+i);
for (i = 0; i < ep->samplers.num; i++)
ep_sampler_free(ep->samplers.array+i);
for (i = 0; i < ep->techniques.num; i++)
ep_technique_free(ep->techniques.array+i);
ep->cur_pass = NULL;
cf_parser_free(&ep->cfp);
da_free(ep->params);
da_free(ep->structs);
da_free(ep->funcs);
da_free(ep->samplers);
da_free(ep->techniques);
}
static inline struct ep_func *ep_getfunc(struct effect_parser *ep,
const char *name)
{
size_t i;
for (i = 0; i < ep->funcs.num; i++) {
if (strcmp(name, ep->funcs.array[i].name) == 0)
return ep->funcs.array+i;
}
return NULL;
}
static inline struct ep_struct *ep_getstruct(struct effect_parser *ep,
const char *name)
{
size_t i;
for (i = 0; i < ep->structs.num; i++) {
if (strcmp(name, ep->structs.array[i].name) == 0)
return ep->structs.array+i;
}
return NULL;
}
static inline struct ep_sampler *ep_getsampler(struct effect_parser *ep,
const char *name)
{
size_t i;
for (i = 0; i < ep->samplers.num; i++) {
if (strcmp(name, ep->samplers.array[i].name) == 0)
return ep->samplers.array+i;
}
return NULL;
}
static inline struct ep_param *ep_getparam(struct effect_parser *ep,
const char *name)
{
size_t i;
for (i = 0; i < ep->params.num; i++) {
if (strcmp(name, ep->params.array[i].name) == 0)
return ep->params.array+i;
}
return NULL;
}
static inline struct ep_func *ep_getfunc_strref(struct effect_parser *ep,
const struct strref *ref)
{
size_t i;
for (i = 0; i < ep->funcs.num; i++) {
if (strref_cmp(ref, ep->funcs.array[i].name) == 0)
return ep->funcs.array+i;
}
return NULL;
}
static inline struct ep_struct *ep_getstruct_strref(struct effect_parser *ep,
const struct strref *ref)
{
size_t i;
for (i = 0; i < ep->structs.num; i++) {
if (strref_cmp(ref, ep->structs.array[i].name) == 0)
return ep->structs.array+i;
}
return NULL;
}
static inline struct ep_sampler *ep_getsampler_strref(struct effect_parser *ep,
const struct strref *ref)
{
size_t i;
for (i = 0; i < ep->samplers.num; i++) {
if (strref_cmp(ref, ep->samplers.array[i].name) == 0)
return ep->samplers.array+i;
}
return NULL;
}
static inline struct ep_param *ep_getparam_strref(struct effect_parser *ep,
const struct strref *ref)
{
size_t i;
for (i = 0; i < ep->params.num; i++) {
if (strref_cmp(ref, ep->params.array[i].name) == 0)
return ep->params.array+i;
}
return NULL;
}
static inline int ep_parse_struct_var(struct effect_parser *ep,
struct ep_var *var)
{
int errcode;
/* -------------------------------------- */
/* variable type */
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, ";")) return PARSE_CONTINUE;
if (token_is(&ep->cfp, "}")) return PARSE_BREAK;
errcode = token_is_type(&ep->cfp, CFTOKEN_NAME, "type name", ";");
if (errcode != PARSE_SUCCESS)
return errcode;
copy_token(&ep->cfp, &var->type);
/* -------------------------------------- */
/* variable name */
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, ";")) return PARSE_UNEXPECTED_CONTINUE;
if (token_is(&ep->cfp, "}")) return PARSE_UNEXPECTED_BREAK;
errcode = token_is_type(&ep->cfp, CFTOKEN_NAME, "variable name", ";");
if (errcode != PARSE_SUCCESS)
return errcode;
copy_token(&ep->cfp, &var->name);
/* -------------------------------------- */
/* variable mapping if any (POSITION, TEXCOORD, etc) */
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, ":")) {
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, ";")) return PARSE_UNEXPECTED_CONTINUE;
if (token_is(&ep->cfp, "}")) return PARSE_UNEXPECTED_BREAK;
errcode = token_is_type(&ep->cfp, CFTOKEN_NAME,
"mapping name", ";");
if (errcode != PARSE_SUCCESS)
return errcode;
copy_token(&ep->cfp, &var->mapping);
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
}
/* -------------------------------------- */
if (!token_is(&ep->cfp, ";")) {
if (!go_to_valid_token(&ep->cfp, ";", "}"))
return PARSE_EOF;
return PARSE_CONTINUE;
}
return PARSE_SUCCESS;
}
static void ep_parse_struct(struct effect_parser *ep)
{
struct ep_struct eps;
ep_struct_init(&eps);
if (next_name(&ep->cfp, &eps.name, "name", ";") != PARSE_SUCCESS)
goto error;
if (next_token_should_be(&ep->cfp, "{", ";", NULL) != PARSE_SUCCESS)
goto error;
/* get structure variables */
while (true) {
bool do_break = false;
struct ep_var var;
ep_var_init(&var);
switch (ep_parse_struct_var(ep, &var)) {
case PARSE_UNEXPECTED_CONTINUE:
cf_adderror_syntax_error(&ep->cfp);
case PARSE_CONTINUE:
ep_var_free(&var);
continue;
case PARSE_UNEXPECTED_BREAK:
cf_adderror_syntax_error(&ep->cfp);
case PARSE_BREAK:
ep_var_free(&var);
do_break = true;
break;
case PARSE_EOF:
ep_var_free(&var);
goto error;
}
if (do_break)
break;
da_push_back(eps.vars, &var);
}
if (next_token_should_be(&ep->cfp, ";", NULL, NULL) != PARSE_SUCCESS)
goto error;
da_push_back(ep->structs, &eps);
return;
error:
ep_struct_free(&eps);
}
static inline int ep_parse_pass_command_call(struct effect_parser *ep,
struct darray *call)
{
struct cf_token end_token;
cf_token_clear(&end_token);
while (!token_is(&ep->cfp, ";")) {
if (token_is(&ep->cfp, "}")) {
cf_adderror_expecting(&ep->cfp, ";");
return PARSE_CONTINUE;
}
darray_push_back(sizeof(struct cf_token), call,
ep->cfp.cur_token);
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
}
darray_push_back(sizeof(struct cf_token), call, ep->cfp.cur_token);
darray_push_back(sizeof(struct cf_token), call, &end_token);
return PARSE_SUCCESS;
}
static int ep_parse_pass_command(struct effect_parser *ep, struct ep_pass *pass)
{
struct darray *call; /* struct cf_token */
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, "vertex_shader") ||
token_is(&ep->cfp, "vertex_program")) {
call = &pass->vertex_program.da;
} else if (token_is(&ep->cfp, "pixel_shader") ||
token_is(&ep->cfp, "pixel_program")) {
call = &pass->fragment_program.da;
} else {
cf_adderror_syntax_error(&ep->cfp);
if (!go_to_valid_token(&ep->cfp, ";", "}")) return PARSE_EOF;
return PARSE_CONTINUE;
}
if (next_token_should_be(&ep->cfp, "=", ";", "}") != PARSE_SUCCESS)
return PARSE_CONTINUE;
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (token_is(&ep->cfp, "compile")) {
cf_adderror(&ep->cfp, "compile keyword not necessary",
LEVEL_WARNING, NULL, NULL, NULL);
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
}
return ep_parse_pass_command_call(ep, call);
}
static int ep_parse_pass(struct effect_parser *ep, struct ep_pass *pass)
{
struct cf_token peek;
if (!token_is(&ep->cfp, "pass"))
return PARSE_UNEXPECTED_CONTINUE;
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
if (!token_is(&ep->cfp, "{")) {
pass->name = bstrdup_n(ep->cfp.cur_token->str.array,
ep->cfp.cur_token->str.len);
if (!next_valid_token(&ep->cfp)) return PARSE_EOF;
}
if (!peek_valid_token(&ep->cfp, &peek)) return PARSE_EOF;
while (strref_cmp(&peek.str, "}") != 0) {
int ret = ep_parse_pass_command(ep, pass);
if (ret < 0 && ret != PARSE_CONTINUE)
return ret;
if (!peek_valid_token(&ep->cfp, &peek))
return PARSE_EOF;
}
/* token is '}' */
next_token(&ep->cfp);
return PARSE_SUCCESS;
}
static void ep_parse_technique(struct effect_parser *ep)
{
struct ep_technique ept;
ep_technique_init(&ept);
if (next_name(&ep->cfp, &ept.name, "name", ";") != PARSE_SUCCESS)
goto error;
if (next_token_should_be(&ep->cfp, "{", ";", NULL) != PARSE_SUCCESS)
goto error;
if (!next_valid_token(&ep->cfp))
goto error;
while (!token_is(&ep->cfp, "}")) {
struct ep_pass pass;
ep_pass_init(&pass);
switch (ep_parse_pass(ep, &pass)) {
case PARSE_UNEXPECTED_CONTINUE:
ep_pass_free(&pass);
if (!go_to_token(&ep->cfp, "}", NULL))
goto error;
continue;
case PARSE_EOF:
ep_pass_free(&pass);
goto error;
}
da_push_back(ept.passes, &pass);
if (!next_valid_token(&ep->cfp))
goto error;
}
/* pass the current token (which is '}') if we reached here */
next_token(&ep->cfp);
da_push_back(ep->techniques, &ept);
return;
error:
next_token(&ep->cfp);
ep_technique_free(&ept);
}
static int ep_parse_sampler_state_item(struct effect_parser *ep,
struct ep_sampler *eps)
{
int ret;
char *state = NULL, *value = NULL;
ret = next_name(&ep->cfp, &state, "state name", ";");
if (ret != PARSE_SUCCESS) goto fail;
ret = next_token_should_be(&ep->cfp, "=", ";", NULL);
if (ret != PARSE_SUCCESS) goto fail;
ret = next_name(&ep->cfp, &value, "value name", ";");
if (ret != PARSE_SUCCESS) goto fail;
ret = next_token_should_be(&ep->cfp, ";", ";", NULL);
if (ret != PARSE_SUCCESS) goto fail;
da_push_back(eps->states, &state);
da_push_back(eps->values, &value);
return ret;
fail:
bfree(state);
bfree(value);
return ret;
}
static void ep_parse_sampler_state(struct effect_parser *ep)
{
struct ep_sampler eps;
struct cf_token peek;
ep_sampler_init(&eps);
if (next_name(&ep->cfp, &eps.name, "name", ";") != PARSE_SUCCESS)
goto error;
if (next_token_should_be(&ep->cfp, "{", ";", NULL) != PARSE_SUCCESS)
goto error;
if (!peek_valid_token(&ep->cfp, &peek))
goto error;
while (strref_cmp(&peek.str, "}") != 0) {
int ret = ep_parse_sampler_state_item(ep, &eps);
if (ret == PARSE_EOF)
goto error;
if (!peek_valid_token(&ep->cfp, &peek))
goto error;
}
if (next_token_should_be(&ep->cfp, "}", ";", NULL) != PARSE_SUCCESS)
goto error;
if (next_token_should_be(&ep->cfp, ";", NULL, NULL) != PARSE_SUCCESS)
goto error;
da_push_back(ep->samplers, &eps);
return;
error:
ep_sampler_free(&eps);
}
static inline int ep_check_for_keyword(struct effect_parser *ep,
const char *keyword, bool *val)
{
bool new_val = token_is(&ep->cfp, keyword);
if (new_val) {
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
if (new_val && *val)
cf_adderror(&ep->cfp, "'$1' keyword already specified",
LEVEL_WARNING, keyword, NULL, NULL);
*val = new_val;
return PARSE_CONTINUE;
}
return PARSE_SUCCESS;
}
static inline int ep_parse_func_param(struct effect_parser *ep,
struct ep_func *func, struct ep_var *var)
{
int errcode;
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
errcode = ep_check_for_keyword(ep, "uniform", &var->uniform);
if (errcode == PARSE_EOF)
return PARSE_EOF;
errcode = get_name(&ep->cfp, &var->type, "type", ")");
if (errcode != PARSE_SUCCESS)
return errcode;
errcode = next_name(&ep->cfp, &var->name, "name", ")");
if (errcode != PARSE_SUCCESS)
return errcode;
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
if (token_is(&ep->cfp, ":")) {
errcode = next_name(&ep->cfp, &var->mapping,
"mapping specifier", ")");
if (errcode != PARSE_SUCCESS)
return errcode;
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
}
if (ep_getstruct(ep, var->type) != NULL)
da_push_back(func->struct_deps, &var->type);
else if (ep_getsampler(ep, var->type) != NULL)
da_push_back(func->sampler_deps, &var->type);
return PARSE_SUCCESS;
}
static bool ep_parse_func_params(struct effect_parser *ep, struct ep_func *func)
{
struct cf_token peek;
int errcode;
cf_token_clear(&peek);
if (!peek_valid_token(&ep->cfp, &peek))
return false;
if (*peek.str.array == ')') {
next_token(&ep->cfp);
goto exit;
}
do {
struct ep_var var;
ep_var_init(&var);
if (!token_is(&ep->cfp, "(") && !token_is(&ep->cfp, ","))
cf_adderror_syntax_error(&ep->cfp);
errcode = ep_parse_func_param(ep, func, &var);
if (errcode != PARSE_SUCCESS) {
ep_var_free(&var);
if (errcode == PARSE_CONTINUE)
goto exit;
else if (errcode == PARSE_EOF)
return false;
}
da_push_back(func->param_vars, &var);
} while (!token_is(&ep->cfp, ")"));
exit:
return true;
}
static inline bool ep_process_struct_dep(struct effect_parser *ep,
struct ep_func *func)
{
struct ep_struct *val = ep_getstruct_strref(ep,
&ep->cfp.cur_token->str);
if (val)
da_push_back(func->struct_deps, &val->name);
return val != NULL;
}
static inline bool ep_process_func_dep(struct effect_parser *ep,
struct ep_func *func)
{
struct ep_func *val = ep_getfunc_strref(ep,
&ep->cfp.cur_token->str);
if (val)
da_push_back(func->func_deps, &val->name);
return val != NULL;
}
static inline bool ep_process_sampler_dep(struct effect_parser *ep,
struct ep_func *func)
{
struct ep_sampler *val = ep_getsampler_strref(ep,
&ep->cfp.cur_token->str);
if (val)
da_push_back(func->sampler_deps, &val->name);
return val != NULL;
}
static inline bool ep_process_param_dep(struct effect_parser *ep,
struct ep_func *func)
{
struct ep_param *val = ep_getparam_strref(ep, &ep->cfp.cur_token->str);
if (val)
da_push_back(func->param_deps, &val->name);
return val != NULL;
}
static inline bool ep_parse_func_contents(struct effect_parser *ep,
struct ep_func *func)
{
int braces = 1;
dstr_cat_strref(&func->contents, &ep->cfp.cur_token->str);
while (braces > 0) {
if ((ep->cfp.cur_token++)->type == CFTOKEN_NONE)
return false;
if (ep->cfp.cur_token->type == CFTOKEN_SPACETAB ||
ep->cfp.cur_token->type == CFTOKEN_NEWLINE) {
} else if (token_is(&ep->cfp, "{")) {
braces++;
} else if (token_is(&ep->cfp, "}")) {
braces--;
} else if (ep_process_struct_dep(ep, func) ||
ep_process_func_dep(ep, func) ||
ep_process_sampler_dep(ep, func) ||
ep_process_param_dep(ep, func)) {
}
dstr_cat_strref(&func->contents, &ep->cfp.cur_token->str);
}
return true;
}
static void ep_parse_function(struct effect_parser *ep,
char *type, char *name)
{
struct ep_func func;
int errcode;
ep_func_init(&func, type, name);
if (ep_getstruct(ep, type))
da_push_back(func.struct_deps, &func.ret_type);
if (!ep_parse_func_params(ep, &func))
goto error;
if (!next_valid_token(&ep->cfp))
goto error;
/* if function is mapped to something, for example COLOR */
if (token_is(&ep->cfp, ":")) {
errcode = next_name(&ep->cfp, &func.mapping,
"mapping specifier", "{");
if (errcode == PARSE_EOF)
goto error;
else if (errcode != PARSE_CONTINUE) {
if (!next_valid_token(&ep->cfp))
goto error;
}
}
if (!token_is(&ep->cfp, "{")) {
cf_adderror_expecting(&ep->cfp, "{");
goto error;
}
if (!ep_parse_func_contents(ep, &func))
goto error;
/* it is established that the current token is '}' if we reach this */
next_token(&ep->cfp);
da_push_back(ep->funcs, &func);
return;
error:
ep_func_free(&func);
}
/* parses "array[count]" */
static bool ep_parse_param_array(struct effect_parser *ep,
struct ep_param *param)
{
if (!next_valid_token(&ep->cfp))
return false;
if (ep->cfp.cur_token->type != CFTOKEN_NUM ||
!valid_int_str(ep->cfp.cur_token->str.array,
ep->cfp.cur_token->str.len))
return false;
param->array_count = strtol(ep->cfp.cur_token->str.array, NULL, 10);
if (next_token_should_be(&ep->cfp, "]", ";", NULL) == PARSE_EOF)
return false;
if (!next_valid_token(&ep->cfp))
return false;
return true;
}
static inline int ep_parse_param_assign_texture(struct effect_parser *ep,
struct ep_param *param)
{
int errcode;
char *str;
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
errcode = token_is_type(&ep->cfp, CFTOKEN_STRING,
"texture path string", ";");
if (errcode != PARSE_SUCCESS)
return errcode;
str = cf_literal_to_str(ep->cfp.cur_token->str.array,
ep->cfp.cur_token->str.len);
if (str) {
da_copy_array(param->default_val, str, strlen(str) + 1);
bfree(str);
}
return PARSE_SUCCESS;
}
static inline int ep_parse_param_assign_intfloat(struct effect_parser *ep,
struct ep_param *param, bool is_float)
{
int errcode;
if (!next_valid_token(&ep->cfp))
return PARSE_EOF;
errcode = token_is_type(&ep->cfp, CFTOKEN_NUM, "numeric value", ";");
if (errcode != PARSE_SUCCESS)
return errcode;
if (is_float) {
float f = (float)strtod(ep->cfp.cur_token->str.array, NULL);
da_push_back_array(param->default_val, &f, sizeof(float));
} else {
long l = strtol(ep->cfp.cur_token->str.array, NULL, 10);
da_push_back_array(param->default_val, &l, sizeof(long));
}
return PARSE_SUCCESS;
}
/*
* parses assignment for float1, float2, float3, float4, and any combination
* for float3x3, float4x4, etc
*/
static inline int ep_parse_param_assign_float_array(struct effect_parser *ep,
struct ep_param *param)
{
const char *float_type = param->type+5;
int float_count = 0, errcode, i;
/* -------------------------------------------- */
if (float_type[0] < '1' || float_type[0] > '4')
cf_adderror(&ep->cfp, "Invalid row count", LEVEL_ERROR,
NULL, NULL, NULL);
float_count = float_type[0]-'0';
if (float_type[1] == 'x') {
if (float_type[2] < '1' || float_type[2] > '4')
cf_adderror(&ep->cfp, "Invalid column count",
LEVEL_ERROR, NULL, NULL, NULL);
float_count *= float_type[2]-'0';
}
/* -------------------------------------------- */
errcode = next_token_should_be(&ep->cfp, "{", ";", NULL);
if (errcode != PARSE_SUCCESS) return errcode;
for (i = 0; i < float_count; i++) {
char *next = ((i+1) < float_count) ? "," : "}";
errcode = ep_parse_param_assign_intfloat(ep, param, true);
if (errcode != PARSE_SUCCESS) return errcode;
errcode = next_token_should_be(&ep->cfp, next, ";", NULL);
if (errcode != PARSE_SUCCESS) return errcode;
}
return PARSE_SUCCESS;
}
static int ep_parse_param_assignment_val(struct effect_parser *ep,
struct ep_param *param)
{
if (param->is_texture)
return ep_parse_param_assign_texture(ep, param);
else if (strcmp(param->type, "int") == 0)
return ep_parse_param_assign_intfloat(ep, param, false);
else if (strcmp(param->type, "float") == 0)
return ep_parse_param_assign_intfloat(ep, param, true);
else if (astrcmp_n(param->type, "float", 5) == 0)
return ep_parse_param_assign_float_array(ep, param);
cf_adderror(&ep->cfp, "Invalid type '$1' used for assignment",
LEVEL_ERROR, param->type, NULL, NULL);
return PARSE_CONTINUE;
}
static inline bool ep_parse_param_assignment(struct effect_parser *ep,
struct ep_param *param)
{
if (ep_parse_param_assignment_val(ep, param) != PARSE_SUCCESS)
return false;
if (!next_valid_token(&ep->cfp))
return false;
return true;
}
/* static bool ep_parse_param_property(struct effect_parser *ep,
struct ep_param *param)
{
} */
static void ep_parse_param(struct effect_parser *ep,
char *type, char *name,
bool is_property, bool is_const, bool is_uniform)
{
struct ep_param param;
ep_param_init(&param, type, name, is_property, is_const);
if (token_is(&ep->cfp, ";"))
goto complete;
if (token_is(&ep->cfp, "[") && !ep_parse_param_array(ep, &param))
goto error;
if (token_is(&ep->cfp, "=") && !ep_parse_param_assignment(ep, &param))
goto error;
/*if (token_is(&ep->cfp, "<") && !ep_parse_param_property(ep, &param))
goto error; */
if (!token_is(&ep->cfp, ";"))
goto error;
complete:
da_push_back(ep->params, &param);
return;
error:
ep_param_free(&param);
}
static bool ep_get_var_specifiers(struct effect_parser *ep,
bool *is_property, bool *is_const, bool *is_uniform)
{
while(true) {
int errcode;
errcode = ep_check_for_keyword(ep, "property", is_property);
if (errcode == PARSE_EOF)
return false;
else if (errcode == PARSE_CONTINUE)
continue;
errcode = ep_check_for_keyword(ep, "const", is_const);
if (errcode == PARSE_EOF)
return false;
else if (errcode == PARSE_CONTINUE)
continue;
errcode = ep_check_for_keyword(ep, "uniform", is_uniform);
if (errcode == PARSE_EOF)
return false;
else if (errcode == PARSE_CONTINUE)
continue;
break;
}
return true;
}
static inline void report_invalid_func_keyword(struct effect_parser *ep,
const char *name, bool val)
{
if (val)
cf_adderror(&ep->cfp, "'$1' keyword cannot be used with a "
"function", LEVEL_ERROR,
name, NULL, NULL);
}
static void ep_parse_other(struct effect_parser *ep)
{
bool is_property = false, is_const = false, is_uniform = false;
char *type = NULL, *name = NULL;
if (!ep_get_var_specifiers(ep, &is_property, &is_const, &is_uniform))
goto error;
if (get_name(&ep->cfp, &type, "type", ";") != PARSE_SUCCESS)
goto error;
if (next_name(&ep->cfp, &name, "name", ";") != PARSE_SUCCESS)
goto error;
if (!next_valid_token(&ep->cfp))
goto error;
if (token_is(&ep->cfp, "(")) {
report_invalid_func_keyword(ep, "property", is_property);
report_invalid_func_keyword(ep, "const", is_const);
report_invalid_func_keyword(ep, "uniform", is_uniform);
ep_parse_function(ep, type, name);
return;
} else {
ep_parse_param(ep, type, name, is_property, is_const,
is_uniform);
return;
}
error:
bfree(type);
bfree(name);
}
static bool ep_compile(struct effect_parser *ep);
bool ep_parse(struct effect_parser *ep, effect_t effect,
const char *effect_string, const char *file)
{
bool success;
ep->effect = effect;
if (!cf_parser_parse(&ep->cfp, effect_string, file))
return false;
while (ep->cfp.cur_token && ep->cfp.cur_token->type != CFTOKEN_NONE) {
if (token_is(&ep->cfp, ";") ||
is_whitespace(*ep->cfp.cur_token->str.array)) {
/* do nothing */
ep->cfp.cur_token++;
} else if (token_is(&ep->cfp, "struct")) {
ep_parse_struct(ep);
} else if (token_is(&ep->cfp, "technique")) {
ep_parse_technique(ep);
} else if (token_is(&ep->cfp, "sampler_state")) {
ep_parse_sampler_state(ep);
} else if (token_is(&ep->cfp, "{")) {
/* add error and pass braces */
cf_adderror(&ep->cfp, "Unexpected code segment",
LEVEL_ERROR, NULL, NULL, NULL);
pass_pair(&ep->cfp, '{', '}');
} else {
/* parameters and functions */
ep_parse_other(ep);
}
}
success = !error_data_has_errors(&ep->cfp.error_list);
if (success)
success = ep_compile(ep);
return success;
}
/* ------------------------------------------------------------------------- */
static inline void ep_write_param(struct dstr *shader, struct ep_param *param,
struct darray *used_params)
{
if (param->written)
return;
if (param->is_const) {
dstr_cat(shader, "const ");
} else {
struct dstr new;
dstr_init_copy(&new, param->name);
darray_push_back(sizeof(struct dstr), used_params, &new);
dstr_cat(shader, "uniform ");
}
dstr_cat(shader, param->type);
dstr_cat(shader, " ");
dstr_cat(shader, param->name);
if (param->array_count)
dstr_catf(shader, "[%u]", param->array_count);
dstr_cat(shader, ";\n");
param->written = true;
}
static inline void ep_write_func_param_deps(struct effect_parser *ep,
struct dstr *shader, struct ep_func *func,
struct darray *used_params)
{
size_t i;
for (i = 0; i < func->param_deps.num; i++) {
const char *name = func->param_deps.array[i];
struct ep_param *param = ep_getparam(ep, name);
ep_write_param(shader, param, used_params);
}
if (func->param_deps.num)
dstr_cat(shader, "\n\n");
}
static void ep_write_sampler(struct dstr *shader, struct ep_sampler *sampler)
{
size_t i;
if (sampler->written)
return;
dstr_cat(shader, "sampler_state ");
dstr_cat(shader, sampler->name);
dstr_cat(shader, " {");
for (i = 0; i <sampler->values.num; i++) {
dstr_cat(shader, "\n\t");
dstr_cat(shader, sampler->states.array[i]);
dstr_cat(shader, " = ");
dstr_cat(shader, sampler->values.array[i]);
dstr_cat(shader, ";\n");
}
dstr_cat(shader, "\n};\n");
sampler->written = true;
}
static inline void ep_write_func_sampler_deps(struct effect_parser *ep,
struct dstr *shader, struct ep_func *func)
{
size_t i;
for (i = 0; i < func->sampler_deps.num; i++) {
const char *name = func->sampler_deps.array[i];
struct ep_sampler *sampler = ep_getsampler(ep, name);
ep_write_sampler(shader, sampler);
dstr_cat(shader, "\n");
}
}
static inline void ep_write_var(struct dstr *shader, struct ep_var *var)
{
if (var->uniform)
dstr_cat(shader, "uniform ");
dstr_cat(shader, var->type);
dstr_cat(shader, " ");
dstr_cat(shader, var->name);
if (var->mapping) {
dstr_cat(shader, " : ");
dstr_cat(shader, var->mapping);
}
}
static void ep_write_struct(struct dstr *shader, struct ep_struct *st)
{
size_t i;
if (st->written)
return;
dstr_cat(shader, "struct ");
dstr_cat(shader, st->name);
dstr_cat(shader, " {");
for (i = 0; i < st->vars.num; i++) {
dstr_cat(shader, "\n\t");
ep_write_var(shader, st->vars.array+i);
dstr_cat(shader, ";");
}
dstr_cat(shader, "\n};\n");
st->written = true;
}
static inline void ep_write_func_struct_deps(struct effect_parser *ep,
struct dstr *shader, struct ep_func *func)
{
size_t i;
for (i = 0; i < func->struct_deps.num; i++) {
const char *name = func->struct_deps.array[i];
struct ep_struct *st = ep_getstruct(ep, name);
if (!st->written) {
ep_write_struct(shader, st);
dstr_cat(shader, "\n");
st->written = true;
}
}
}
static void ep_write_func(struct effect_parser *ep, struct dstr *shader,
struct ep_func *func, struct darray *used_params);
static inline void ep_write_func_func_deps(struct effect_parser *ep,
struct dstr *shader, struct ep_func *func,
struct darray *used_params)
{
size_t i;
for (i = 0; i < func->func_deps.num; i++) {
const char *name = func->func_deps.array[i];
struct ep_func *func = ep_getfunc(ep, name);
if (!func->written) {
ep_write_func(ep, shader, func, used_params);
dstr_cat(shader, "\n\n");
}
}
}
static void ep_write_func(struct effect_parser *ep, struct dstr *shader,
struct ep_func *func, struct darray *used_params)
{
size_t i;
func->written = true;
ep_write_func_param_deps(ep, shader, func, used_params);
ep_write_func_sampler_deps(ep, shader, func);
ep_write_func_struct_deps(ep, shader, func);
ep_write_func_func_deps(ep, shader, func, used_params);
/* ------------------------------------ */
dstr_cat(shader, func->ret_type);
dstr_cat(shader, " ");
dstr_cat(shader, func->name);
dstr_cat(shader, "(");
for (i = 0; i < func->param_vars.num; i++) {
struct ep_var *var = func->param_vars.array+i;
if (i)
dstr_cat(shader, ", ");
ep_write_var(shader, var);
}
dstr_cat(shader, ")\n");
dstr_cat_dstr(shader, &func->contents);
dstr_cat(shader, "\n");
}
/* writes mapped vars used by the call as parameters for main */
static void ep_write_main_params(struct effect_parser *ep,
struct dstr *shader, struct dstr *param_str,
struct ep_func *func)
{
size_t i;
bool empty_params = dstr_isempty(param_str);
for (i = 0; i < func->param_vars.num; i++) {
struct ep_var *var = func->param_vars.array+i;
struct ep_struct *st = NULL;
bool mapped = (var->mapping != NULL);
if (!mapped) {
st = ep_getstruct(ep, var->type);
if (st)
mapped = ep_struct_mapped(st);
}
if (mapped) {
dstr_cat(shader, var->type);
dstr_cat(shader, " ");
dstr_cat(shader, var->name);
if (!st) {
dstr_cat(shader, " : ");
dstr_cat(shader, var->mapping);
}
if (!dstr_isempty(param_str))
dstr_cat(param_str, ", ");
dstr_cat(param_str, var->name);
}
}
if (!empty_params)
dstr_cat(param_str, ", ");
}
static void ep_write_main(struct effect_parser *ep, struct dstr *shader,
struct ep_func *func, struct dstr *call_str)
{
struct dstr param_str;
struct dstr adjusted_call;
dstr_init(&param_str);
dstr_init_copy_dstr(&adjusted_call, call_str);
dstr_cat(shader, "\n");
dstr_cat(shader, func->ret_type);
dstr_cat(shader, " main(");
ep_write_main_params(ep, shader, &param_str, func);
dstr_cat(shader, ")");
if (func->mapping) {
dstr_cat(shader, " : ");
dstr_cat(shader, func->mapping);
}
dstr_cat(shader, "\n{\n\treturn ");
dstr_cat_dstr(shader, &adjusted_call);
dstr_cat(shader, "\n}\n");
dstr_free(&adjusted_call);
dstr_free(&param_str);
}
static inline void ep_reset_written(struct effect_parser *ep)
{
size_t i;
for (i = 0; i <ep->params.num; i++)
ep->params.array[i].written = false;
for (i = 0; i <ep->structs.num; i++)
ep->structs.array[i].written = false;
for (i = 0; i <ep->funcs.num; i++)
ep->funcs.array[i].written = false;
for (i = 0; i <ep->samplers.num; i++)
ep->samplers.array[i].written = false;
}
static void ep_makeshaderstring(struct effect_parser *ep,
struct dstr *shader, struct darray *shader_call,
struct darray *used_params)
{
struct cf_token *token = shader_call->array;
struct cf_token *func_name;
struct ep_func *func;
struct dstr call_str;
dstr_init(&call_str);
while (token->type != CFTOKEN_NONE && is_whitespace(*token->str.array))
token++;
if (token->type == CFTOKEN_NONE ||
strref_cmp(&token->str, "NULL") == 0)
return;
func_name = token;
while (token->type != CFTOKEN_NONE) {
struct ep_param *param = ep_getparam_strref(ep, &token->str);
if (param)
ep_write_param(shader, param, used_params);
dstr_cat_strref(&call_str, &token->str);
token++;
}
func = ep_getfunc_strref(ep, &func_name->str);
if (!func)
return;
ep_write_func(ep, shader, func, used_params);
ep_write_main(ep, shader, func, &call_str);
dstr_free(&call_str);
ep_reset_written(ep);
}
static void ep_compile_param(struct effect_parser *ep, size_t idx)
{
struct effect_param *param;
struct ep_param *param_in;
param = ep->effect->params.array+idx;
param_in = ep->params.array+idx;
param_in->param = param;
param->name = bstrdup(param_in->name);
param->section = EFFECT_PARAM;
da_move(param->default_val, param_in->default_val);
if (strcmp(param_in->type, "bool") == 0)
param->type = SHADER_PARAM_BOOL;
else if (strcmp(param_in->type, "float") == 0)
param->type = SHADER_PARAM_FLOAT;
else if (strcmp(param_in->type, "int") == 0)
param->type = SHADER_PARAM_INT;
else if (strcmp(param_in->type, "float2") == 0)
param->type = SHADER_PARAM_VEC2;
else if (strcmp(param_in->type, "float3") == 0)
param->type = SHADER_PARAM_VEC3;
else if (strcmp(param_in->type, "float4") == 0)
param->type = SHADER_PARAM_VEC4;
else if (strcmp(param_in->type, "float3x3") == 0)
param->type = SHADER_PARAM_MATRIX3X3;
else if (strcmp(param_in->type, "float4x4") == 0)
param->type = SHADER_PARAM_MATRIX4X4;
else if (param_in->is_texture)
param->type = SHADER_PARAM_TEXTURE;
if (strcmp(param_in->name, "ViewProj") == 0)
ep->effect->view_proj = param;
else if (strcmp(param_in->name, "World") == 0)
ep->effect->world = param;
}
static inline void ep_compile_pass_shaderparams(struct effect_parser *ep,
struct darray *pass_params, struct darray *used_params,
shader_t shader)
{
size_t i;
darray_resize(sizeof(struct pass_shaderparam), pass_params,
used_params->num);
for (i = 0; i < pass_params->num; i++) {
struct dstr *param_name;
struct pass_shaderparam *param;
param_name = darray_item(sizeof(struct dstr), used_params, i);
param = darray_item(sizeof(struct pass_shaderparam),
pass_params, i);
param->eparam = effect_getparambyname(ep->effect,
param_name->array);
param->sparam = shader_getparambyname(shader,
param_name->array);
}
}
static inline bool ep_compile_pass_shader(struct effect_parser *ep,
struct effect_technique *tech,
struct effect_pass *pass, struct ep_pass *pass_in,
size_t pass_idx, enum shader_type type)
{
struct dstr shader_str;
struct dstr location;
struct darray used_params; /* struct dstr */
struct darray *pass_params; /* struct pass_shaderparam */
shader_t shader;
dstr_init(&shader_str);
darray_init(&used_params);
dstr_init(&location);
dstr_copy(&location, ep->cfp.lex.file);
if (type == SHADER_VERTEX)
dstr_cat(&location, " (Vertex ");
else if (type == SHADER_PIXEL)
dstr_cat(&location, " (Pixel ");
else if (type == SHADER_GEOMETRY)
dstr_cat(&location, " (Geometry ");
dstr_catf(&location, "shader, technique %s, pass %u)", tech->name,
pass_idx);
if (type == SHADER_VERTEX) {
ep_makeshaderstring(ep, &shader_str,
&pass_in->vertex_program.da, &used_params);
pass->vertshader = gs_create_vertexshader(shader_str.array,
location.array, NULL);
shader = pass->vertshader;
pass_params = &pass->vertshader_params.da;
} else if (type == SHADER_PIXEL) {
ep_makeshaderstring(ep, &shader_str,
&pass_in->fragment_program.da, &used_params);
pass->pixelshader = gs_create_pixelshader(shader_str.array,
location.array, NULL);
shader = pass->pixelshader;
pass_params = &pass->pixelshader_params.da;
}
blog(LOG_DEBUG, "+++++++++++++++++++++++++++++++++++");
blog(LOG_DEBUG, " %s", location.array);
blog(LOG_DEBUG, "-----------------------------------");
blog(LOG_DEBUG, "%s", shader_str.array);
blog(LOG_DEBUG, "+++++++++++++++++++++++++++++++++++");
if (shader)
ep_compile_pass_shaderparams(ep, pass_params, &used_params,
shader);
dstr_free(&location);
dstr_array_free(used_params.array, used_params.num);
darray_free(&used_params);
dstr_free(&shader_str);
return shader != NULL;
}
static bool ep_compile_pass(struct effect_parser *ep,
struct effect_technique *tech,
struct ep_technique *tech_in,
size_t idx)
{
struct effect_pass *pass;
struct ep_pass *pass_in;
bool success = true;
pass = tech->passes.array+idx;
pass_in = tech_in->passes.array+idx;
pass->name = bstrdup(pass_in->name);
pass->section = EFFECT_PASS;
if (!ep_compile_pass_shader(ep, tech, pass, pass_in, idx,
SHADER_VERTEX))
success = false;
if (!ep_compile_pass_shader(ep, tech, pass, pass_in, idx,
SHADER_PIXEL))
success = false;
return success;
}
static inline bool ep_compile_technique(struct effect_parser *ep, size_t idx)
{
struct effect_technique *tech;
struct ep_technique *tech_in;
bool success = true;
size_t i;
tech = ep->effect->techniques.array+idx;
tech_in = ep->techniques.array+idx;
tech->name = bstrdup(tech_in->name);
tech->section = EFFECT_TECHNIQUE;
tech->effect = ep->effect;
da_resize(tech->passes, tech_in->passes.num);
for (i = 0; i < tech->passes.num; i++) {
if (!ep_compile_pass(ep, tech, tech_in, i))
success = false;
}
return success;
}
static bool ep_compile(struct effect_parser *ep)
{
bool success = true;
size_t i;
assert(ep->effect);
da_resize(ep->effect->params, ep->params.num);
da_resize(ep->effect->techniques, ep->techniques.num);
for (i = 0; i < ep->params.num; i++)
ep_compile_param(ep, i);
for (i = 0; i < ep->techniques.num; i++) {
if (!ep_compile_technique(ep, i))
success = false;
}
return success;
}