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- /******************************************************************************
- Copyright (C) 2023 by Lain Bailey <lain@obsproject.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
- #include "effect-parser.h"
- #include "graphics.h"
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef DARRAY(struct gs_effect_param) gs_effect_param_array_t;
- typedef DARRAY(struct pass_shaderparam) pass_shaderparam_array_t;
- /*
- * Effects introduce a means of bundling together shader text into one
- * file with shared functions and parameters. This is done because often
- * shaders must be duplicated when you need to alter minor aspects of the code
- * that cannot be done via constants. Effects allow developers to easily
- * switch shaders and set constants that can be used between shaders.
- *
- * Effects are built via the effect parser, and shaders are automatically
- * generated for each technique's pass.
- */
- /* ------------------------------------------------------------------------- */
- enum effect_section { EFFECT_PARAM, EFFECT_TECHNIQUE, EFFECT_SAMPLER, EFFECT_PASS, EFFECT_ANNOTATION };
- /* ------------------------------------------------------------------------- */
- struct gs_effect_param {
- char *name;
- enum effect_section section;
- enum gs_shader_param_type type;
- bool changed;
- DARRAY(uint8_t) cur_val;
- DARRAY(uint8_t) default_val;
- gs_effect_t *effect;
- gs_samplerstate_t *next_sampler;
- /*char *full_name;
- float scroller_min, scroller_max, scroller_inc, scroller_mul;*/
- gs_effect_param_array_t annotations;
- };
- static inline void effect_param_init(struct gs_effect_param *param)
- {
- memset(param, 0, sizeof(struct gs_effect_param));
- da_init(param->annotations);
- }
- static inline void effect_param_free(struct gs_effect_param *param)
- {
- bfree(param->name);
- //bfree(param->full_name);
- da_free(param->cur_val);
- da_free(param->default_val);
- size_t i;
- for (i = 0; i < param->annotations.num; i++)
- effect_param_free(param->annotations.array + i);
- da_free(param->annotations);
- }
- EXPORT void effect_param_parse_property(gs_eparam_t *param, const char *property);
- /* ------------------------------------------------------------------------- */
- struct pass_shaderparam {
- struct gs_effect_param *eparam;
- gs_sparam_t *sparam;
- };
- struct gs_effect_pass {
- char *name;
- enum effect_section section;
- gs_shader_t *vertshader;
- gs_shader_t *pixelshader;
- pass_shaderparam_array_t vertshader_params;
- pass_shaderparam_array_t pixelshader_params;
- };
- static inline void effect_pass_init(struct gs_effect_pass *pass)
- {
- memset(pass, 0, sizeof(struct gs_effect_pass));
- }
- static inline void effect_pass_free(struct gs_effect_pass *pass)
- {
- bfree(pass->name);
- da_free(pass->vertshader_params);
- da_free(pass->pixelshader_params);
- gs_shader_destroy(pass->vertshader);
- gs_shader_destroy(pass->pixelshader);
- }
- /* ------------------------------------------------------------------------- */
- struct gs_effect_technique {
- char *name;
- enum effect_section section;
- struct gs_effect *effect;
- DARRAY(struct gs_effect_pass) passes;
- };
- static inline void effect_technique_init(struct gs_effect_technique *t)
- {
- memset(t, 0, sizeof(struct gs_effect_technique));
- }
- static inline void effect_technique_free(struct gs_effect_technique *t)
- {
- size_t i;
- for (i = 0; i < t->passes.num; i++)
- effect_pass_free(t->passes.array + i);
- da_free(t->passes);
- bfree(t->name);
- }
- /* ------------------------------------------------------------------------- */
- struct gs_effect {
- bool processing;
- bool cached;
- char *effect_path, *effect_dir;
- gs_effect_param_array_t params;
- DARRAY(struct gs_effect_technique) techniques;
- struct gs_effect_technique *cur_technique;
- struct gs_effect_pass *cur_pass;
- gs_eparam_t *view_proj, *world, *scale;
- graphics_t *graphics;
- struct gs_effect *next;
- size_t loop_pass;
- bool looping;
- };
- static inline void effect_init(gs_effect_t *effect)
- {
- memset(effect, 0, sizeof(struct gs_effect));
- }
- static inline void effect_free(gs_effect_t *effect)
- {
- size_t i;
- for (i = 0; i < effect->params.num; i++)
- effect_param_free(effect->params.array + i);
- for (i = 0; i < effect->techniques.num; i++)
- effect_technique_free(effect->techniques.array + i);
- da_free(effect->params);
- da_free(effect->techniques);
- bfree(effect->effect_path);
- bfree(effect->effect_dir);
- effect->effect_path = NULL;
- effect->effect_dir = NULL;
- }
- #ifdef __cplusplus
- }
- #endif
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