88 lines
2.7 KiB
C
88 lines
2.7 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 2 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/>.
|
|
******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
/*
|
|
* Parses shaders into GLSL. Shaders are almost identical to HLSL
|
|
* model 5 so it requires quite a bit of tweaking to convert correctly.
|
|
* Takes the parsed shader data, and builds a GLSL string out of it.
|
|
*/
|
|
|
|
#include <util/dstr.h>
|
|
#include <graphics/shader-parser.h>
|
|
|
|
struct gl_parser_attrib {
|
|
struct dstr name;
|
|
const char *mapping;
|
|
bool input;
|
|
};
|
|
|
|
static inline void gl_parser_attrib_init(struct gl_parser_attrib *attr)
|
|
{
|
|
memset(attr, 0, sizeof(struct gl_parser_attrib));
|
|
}
|
|
|
|
static inline void gl_parser_attrib_free(struct gl_parser_attrib *attr)
|
|
{
|
|
dstr_free(&attr->name);
|
|
}
|
|
|
|
struct gl_shader_parser {
|
|
enum gs_shader_type type;
|
|
const char *input_prefix;
|
|
const char *output_prefix;
|
|
struct shader_parser parser;
|
|
struct dstr gl_string;
|
|
|
|
DARRAY(uint32_t) texture_samplers;
|
|
DARRAY(struct gl_parser_attrib) attribs;
|
|
};
|
|
|
|
static inline void gl_shader_parser_init(struct gl_shader_parser *glsp,
|
|
enum gs_shader_type type)
|
|
{
|
|
glsp->type = type;
|
|
|
|
if (type == GS_SHADER_VERTEX) {
|
|
glsp->input_prefix = "_input_attrib";
|
|
glsp->output_prefix = "_vertex_shader_attrib";
|
|
} else if (type == GS_SHADER_PIXEL) {
|
|
glsp->input_prefix = "_vertex_shader_attrib";
|
|
glsp->output_prefix = "_pixel_shader_attrib";
|
|
}
|
|
|
|
shader_parser_init(&glsp->parser);
|
|
dstr_init(&glsp->gl_string);
|
|
da_init(glsp->texture_samplers);
|
|
da_init(glsp->attribs);
|
|
}
|
|
|
|
static inline void gl_shader_parser_free(struct gl_shader_parser *glsp)
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < glsp->attribs.num; i++)
|
|
gl_parser_attrib_free(glsp->attribs.array+i);
|
|
|
|
da_free(glsp->attribs);
|
|
da_free(glsp->texture_samplers);
|
|
dstr_free(&glsp->gl_string);
|
|
shader_parser_free(&glsp->parser);
|
|
}
|
|
|
|
extern bool gl_shader_parse(struct gl_shader_parser *glsp,
|
|
const char *shader_str, const char *file);
|