381 lines
8.6 KiB
C
381 lines
8.6 KiB
C
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/******************************************************************************
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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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#include "effect.h"
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#include "graphics-internal.h"
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#include "vec2.h"
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#include "vec3.h"
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#include "vec4.h"
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void gs_effect_actually_destroy(gs_effect_t *effect)
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{
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effect_free(effect);
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bfree(effect);
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}
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void gs_effect_destroy(gs_effect_t *effect)
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{
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if (effect) {
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if (!effect->cached)
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gs_effect_actually_destroy(effect);
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}
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}
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gs_technique_t *gs_effect_get_technique(const gs_effect_t *effect,
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const char *name)
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{
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if (!effect) return NULL;
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for (size_t i = 0; i < effect->techniques.num; i++) {
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struct gs_effect_technique *tech = effect->techniques.array+i;
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if (strcmp(tech->name, name) == 0)
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return tech;
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}
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return NULL;
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}
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gs_technique_t *gs_effect_get_current_technique(const gs_effect_t *effect)
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{
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if (!effect) return NULL;
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return effect->cur_technique;
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}
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bool gs_effect_loop(gs_effect_t *effect, const char *name)
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{
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if (!effect) {
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return false;
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}
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if (!effect->looping) {
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gs_technique_t *tech;
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if (!!gs_get_effect()) {
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blog(LOG_WARNING, "gs_effect_loop: An effect is "
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"already active");
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return false;
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}
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tech = gs_effect_get_technique(effect, name);
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if (!tech) {
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blog(LOG_WARNING, "gs_effect_loop: Technique '%s' "
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"not found.", name);
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return false;
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}
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gs_technique_begin(tech);
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effect->looping = true;
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} else {
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gs_technique_end_pass(effect->cur_technique);
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}
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if (!gs_technique_begin_pass(effect->cur_technique,
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effect->loop_pass++)) {
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gs_technique_end(effect->cur_technique);
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effect->looping = false;
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effect->loop_pass = 0;
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return false;
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}
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return true;
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}
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size_t gs_technique_begin(gs_technique_t *tech)
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{
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if (!tech) return 0;
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tech->effect->cur_technique = tech;
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tech->effect->graphics->cur_effect = tech->effect;
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return tech->passes.num;
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}
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void gs_technique_end(gs_technique_t *tech)
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{
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if (!tech) return;
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struct gs_effect *effect = tech->effect;
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struct gs_effect_param *params = effect->params.array;
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size_t i;
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gs_load_vertexshader(NULL);
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gs_load_pixelshader(NULL);
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tech->effect->cur_technique = NULL;
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tech->effect->graphics->cur_effect = NULL;
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for (i = 0; i < effect->params.num; i++) {
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struct gs_effect_param *param = params+i;
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da_free(param->cur_val);
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param->changed = false;
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}
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}
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static inline void reset_params(struct darray *shaderparams)
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{
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struct pass_shaderparam *params = shaderparams->array;
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size_t i;
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for (i = 0; i < shaderparams->num; i++)
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params[i].eparam->changed = false;
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}
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static void upload_shader_params(struct darray *pass_params, bool changed_only)
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{
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struct pass_shaderparam *params = pass_params->array;
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size_t i;
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for (i = 0; i < pass_params->num; i++) {
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struct pass_shaderparam *param = params+i;
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struct gs_effect_param *eparam = param->eparam;
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gs_sparam_t *sparam = param->sparam;
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if (changed_only && !eparam->changed)
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continue;
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if (!eparam->cur_val.num) {
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if (eparam->default_val.num)
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da_copy(eparam->cur_val, eparam->default_val);
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else
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continue;
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}
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gs_shader_set_val(sparam, eparam->cur_val.array,
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eparam->cur_val.num);
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}
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}
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static inline void upload_parameters(struct gs_effect *effect,
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bool changed_only)
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{
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struct darray *vshader_params, *pshader_params;
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if (!effect->cur_pass)
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return;
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vshader_params = &effect->cur_pass->vertshader_params.da;
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pshader_params = &effect->cur_pass->pixelshader_params.da;
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upload_shader_params(vshader_params, changed_only);
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upload_shader_params(pshader_params, changed_only);
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reset_params(vshader_params);
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reset_params(pshader_params);
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}
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void gs_effect_update_params(gs_effect_t *effect)
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{
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if (effect)
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upload_parameters(effect, true);
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}
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bool gs_technique_begin_pass(gs_technique_t *tech, size_t idx)
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{
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struct gs_effect_pass *passes;
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struct gs_effect_pass *cur_pass;
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if (!tech || idx >= tech->passes.num)
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return false;
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passes = tech->passes.array;
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cur_pass = passes+idx;
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tech->effect->cur_pass = cur_pass;
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gs_load_vertexshader(cur_pass->vertshader);
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gs_load_pixelshader(cur_pass->pixelshader);
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upload_parameters(tech->effect, false);
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return true;
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}
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bool gs_technique_begin_pass_by_name(gs_technique_t *tech,
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const char *name)
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{
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if (!tech)
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return false;
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for (size_t i = 0; i < tech->passes.num; i++) {
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struct gs_effect_pass *pass = tech->passes.array+i;
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if (strcmp(pass->name, name) == 0) {
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gs_technique_begin_pass(tech, i);
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return true;
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}
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}
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return false;
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}
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static inline void clear_tex_params(struct darray *in_params)
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{
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struct pass_shaderparam *params = in_params->array;
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for (size_t i = 0; i < in_params->num; i++) {
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struct pass_shaderparam *param = params+i;
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struct gs_shader_param_info info;
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gs_shader_get_param_info(param->sparam, &info);
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if (info.type == GS_SHADER_PARAM_TEXTURE)
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gs_shader_set_texture(param->sparam, NULL);
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}
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}
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void gs_technique_end_pass(gs_technique_t *tech)
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{
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if (!tech) return;
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struct gs_effect_pass *pass = tech->effect->cur_pass;
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if (!pass)
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return;
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clear_tex_params(&pass->vertshader_params.da);
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clear_tex_params(&pass->pixelshader_params.da);
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tech->effect->cur_pass = NULL;
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}
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size_t gs_effect_get_num_params(const gs_effect_t *effect)
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{
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return effect ? effect->params.num : 0;
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}
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gs_eparam_t *gs_effect_get_param_by_idx(const gs_effect_t *effect, size_t param)
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{
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if (!effect) return NULL;
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struct gs_effect_param *params = effect->params.array;
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if (param >= effect->params.num)
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return NULL;
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return params+param;
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}
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gs_eparam_t *gs_effect_get_param_by_name(const gs_effect_t *effect,
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const char *name)
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{
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if (!effect) return NULL;
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struct gs_effect_param *params = effect->params.array;
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for (size_t i = 0; i < effect->params.num; i++) {
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struct gs_effect_param *param = params+i;
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if (strcmp(param->name, name) == 0)
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return param;
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}
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return NULL;
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}
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gs_eparam_t *gs_effect_get_viewproj_matrix(const gs_effect_t *effect)
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{
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return effect ? effect->view_proj : NULL;
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}
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gs_eparam_t *gs_effect_get_world_matrix(const gs_effect_t *effect)
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{
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return effect ? effect->world : NULL;
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}
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void gs_effect_get_param_info(const gs_eparam_t *param,
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struct gs_effect_param_info *info)
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{
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if (!param)
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return;
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info->name = param->name;
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info->type = param->type;
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}
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static inline void effect_setval_inline(gs_eparam_t *param,
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const void *data, size_t size)
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{
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bool size_changed;
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if (!param) {
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blog(LOG_ERROR, "effect_setval_inline: invalid param");
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return;
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}
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if (!data) {
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blog(LOG_ERROR, "effect_setval_inline: invalid data");
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return;
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}
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size_changed = param->cur_val.num != size;
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if (size_changed)
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da_resize(param->cur_val, size);
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if (size_changed || memcmp(param->cur_val.array, data, size) != 0) {
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memcpy(param->cur_val.array, data, size);
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param->changed = true;
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}
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}
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void gs_effect_set_bool(gs_eparam_t *param, bool val)
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{
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int b_val = (int)val;
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effect_setval_inline(param, &b_val, sizeof(int));
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}
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void gs_effect_set_float(gs_eparam_t *param, float val)
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{
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effect_setval_inline(param, &val, sizeof(float));
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}
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void gs_effect_set_int(gs_eparam_t *param, int val)
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{
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effect_setval_inline(param, &val, sizeof(int));
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}
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void gs_effect_set_matrix4(gs_eparam_t *param, const struct matrix4 *val)
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{
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effect_setval_inline(param, val, sizeof(struct matrix4));
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}
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void gs_effect_set_vec2(gs_eparam_t *param, const struct vec2 *val)
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{
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effect_setval_inline(param, val, sizeof(struct vec2));
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}
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void gs_effect_set_vec3(gs_eparam_t *param, const struct vec3 *val)
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{
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effect_setval_inline(param, val, sizeof(float) * 3);
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}
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void gs_effect_set_vec4(gs_eparam_t *param, const struct vec4 *val)
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{
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effect_setval_inline(param, val, sizeof(struct vec4));
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}
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void gs_effect_set_texture(gs_eparam_t *param, gs_texture_t *val)
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{
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effect_setval_inline(param, &val, sizeof(gs_texture_t*));
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}
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void gs_effect_set_val(gs_eparam_t *param, const void *val, size_t size)
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{
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effect_setval_inline(param, val, size);
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}
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void gs_effect_set_default(gs_eparam_t *param)
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{
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effect_setval_inline(param, param->default_val.array,
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param->default_val.num);
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}
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