c9df41c1e2
Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
182 lines
4.7 KiB
C
182 lines
4.7 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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#include "effect-parser.h"
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#include "graphics.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Effects introduce a means of bundling together shader text into one
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* file with shared functions and parameters. This is done because often
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* shaders must be duplicated when you need to alter minor aspects of the code
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* that cannot be done via constants. Effects allow developers to easily
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* switch shaders and set constants that can be used between shaders.
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*
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* Effects are built via the effect parser, and shaders are automatically
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* generated for each technique's pass.
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*/
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/* ------------------------------------------------------------------------- */
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enum effect_section {
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EFFECT_PARAM,
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EFFECT_TECHNIQUE,
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EFFECT_SAMPLER,
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EFFECT_PASS
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};
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/* ------------------------------------------------------------------------- */
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struct gs_effect_param {
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char *name;
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enum effect_section section;
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enum gs_shader_param_type type;
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bool changed;
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DARRAY(uint8_t) cur_val;
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DARRAY(uint8_t) default_val;
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gs_effect_t *effect;
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/*char *full_name;
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float scroller_min, scroller_max, scroller_inc, scroller_mul;*/
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};
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static inline void effect_param_init(struct gs_effect_param *param)
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{
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memset(param, 0, sizeof(struct gs_effect_param));
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}
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static inline void effect_param_free(struct gs_effect_param *param)
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{
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bfree(param->name);
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//bfree(param->full_name);
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da_free(param->cur_val);
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da_free(param->default_val);
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}
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EXPORT void effect_param_parse_property(gs_eparam_t *param,
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const char *property);
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/* ------------------------------------------------------------------------- */
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struct pass_shaderparam {
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struct gs_effect_param *eparam;
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gs_sparam_t *sparam;
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};
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struct gs_effect_pass {
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char *name;
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enum effect_section section;
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gs_shader_t *vertshader;
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gs_shader_t *pixelshader;
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DARRAY(struct pass_shaderparam) vertshader_params;
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DARRAY(struct pass_shaderparam) pixelshader_params;
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};
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static inline void effect_pass_init(struct gs_effect_pass *pass)
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{
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memset(pass, 0, sizeof(struct gs_effect_pass));
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}
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static inline void effect_pass_free(struct gs_effect_pass *pass)
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{
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bfree(pass->name);
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da_free(pass->vertshader_params);
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da_free(pass->pixelshader_params);
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gs_shader_destroy(pass->vertshader);
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gs_shader_destroy(pass->pixelshader);
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}
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/* ------------------------------------------------------------------------- */
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struct gs_effect_technique {
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char *name;
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enum effect_section section;
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struct gs_effect *effect;
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DARRAY(struct gs_effect_pass) passes;
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};
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static inline void effect_technique_init(struct gs_effect_technique *t)
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{
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memset(t, 0, sizeof(struct gs_effect_technique));
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}
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static inline void effect_technique_free(struct gs_effect_technique *t)
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{
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size_t i;
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for (i = 0; i < t->passes.num; i++)
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effect_pass_free(t->passes.array+i);
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da_free(t->passes);
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bfree(t->name);
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}
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/* ------------------------------------------------------------------------- */
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struct gs_effect {
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bool processing;
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char *effect_path, *effect_dir;
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DARRAY(struct gs_effect_param) params;
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DARRAY(struct gs_effect_technique) techniques;
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struct gs_effect_technique *cur_technique;
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struct gs_effect_pass *cur_pass;
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gs_eparam_t *view_proj, *world, *scale;
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graphics_t *graphics;
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};
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static inline void effect_init(gs_effect_t *effect)
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{
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memset(effect, 0, sizeof(struct gs_effect));
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}
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static inline void effect_free(gs_effect_t *effect)
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{
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size_t i;
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for (i = 0; i < effect->params.num; i++)
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effect_param_free(effect->params.array+i);
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for (i = 0; i < effect->techniques.num; i++)
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effect_technique_free(effect->techniques.array+i);
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da_free(effect->params);
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da_free(effect->techniques);
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bfree(effect->effect_path);
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bfree(effect->effect_dir);
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effect->effect_path = NULL;
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effect->effect_dir = NULL;
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}
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EXPORT void effect_upload_params(gs_effect_t *effect, bool changed_only);
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EXPORT void effect_upload_shader_params(gs_effect_t *effect,
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gs_shader_t *shader, struct darray *pass_params,
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bool changed_only);
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#ifdef __cplusplus
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}
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#endif
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