91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#pragma once
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/*
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* Parses shaders into GLSL. Shaders are almost identical to HLSL
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* model 5 so it requires quite a bit of tweaking to convert correctly.
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* Takes the parsed shader data, and builds a GLSL string out of it.
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*/
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#include <util/dstr.h>
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#include <graphics/shader-parser.h>
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struct gl_parser_attrib {
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struct dstr name;
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const char *mapping;
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bool input;
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};
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static inline void gl_parser_attrib_init(struct gl_parser_attrib *attr)
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{
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memset(attr, 0, sizeof(struct gl_parser_attrib));
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}
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static inline void gl_parser_attrib_free(struct gl_parser_attrib *attr)
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{
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dstr_free(&attr->name);
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}
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struct gl_shader_parser {
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enum gs_shader_type type;
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const char *input_prefix;
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const char *output_prefix;
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struct shader_parser parser;
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struct dstr gl_string;
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int sincos_counter;
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DARRAY(uint32_t) texture_samplers;
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DARRAY(struct gl_parser_attrib) attribs;
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};
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static inline void gl_shader_parser_init(struct gl_shader_parser *glsp,
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enum gs_shader_type type)
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{
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glsp->type = type;
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if (type == GS_SHADER_VERTEX) {
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glsp->input_prefix = "_input_attrib";
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glsp->output_prefix = "_vertex_shader_attrib";
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} else if (type == GS_SHADER_PIXEL) {
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glsp->input_prefix = "_vertex_shader_attrib";
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glsp->output_prefix = "_pixel_shader_attrib";
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}
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shader_parser_init(&glsp->parser);
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dstr_init(&glsp->gl_string);
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da_init(glsp->texture_samplers);
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da_init(glsp->attribs);
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glsp->sincos_counter = 1;
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}
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static inline void gl_shader_parser_free(struct gl_shader_parser *glsp)
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{
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size_t i;
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for (i = 0; i < glsp->attribs.num; i++)
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gl_parser_attrib_free(glsp->attribs.array + i);
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da_free(glsp->attribs);
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da_free(glsp->texture_samplers);
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dstr_free(&glsp->gl_string);
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shader_parser_free(&glsp->parser);
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}
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extern bool gl_shader_parse(struct gl_shader_parser *glsp,
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const char *shader_str, const char *file);
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