obs-studio/plugins/text-freetype2/obs-convenience.c

86 lines
2.5 KiB
C

/******************************************************************************
Copyright (C) 2014 by Nibbles
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/>.
******************************************************************************/
#include <obs-module.h>
#include <graphics/vec2.h>
#include <graphics/vec3.h>
#include <graphics/vec4.h>
#include "obs-convenience.h"
gs_vertbuffer_t *create_uv_vbuffer(uint32_t num_verts, bool add_color) {
obs_enter_graphics();
gs_vertbuffer_t *tmp = NULL;
struct gs_vb_data *vrect = NULL;
vrect = gs_vbdata_create();
vrect->num = num_verts;
vrect->points = (struct vec3 *)bmalloc(sizeof(struct vec3) * num_verts);
vrect->num_tex = 1;
vrect->tvarray =
(struct gs_tvertarray *)bmalloc(sizeof(struct gs_tvertarray));
vrect->tvarray[0].width = 2;
vrect->tvarray[0].array = bmalloc(sizeof(struct vec2) * num_verts);
if (add_color)
vrect->colors = (uint32_t *)bmalloc
(sizeof(uint32_t)* num_verts);
memset(vrect->points, 0, sizeof(struct vec3) * num_verts);
memset(vrect->tvarray[0].array, 0, sizeof(struct vec2) * num_verts);
if (add_color)
memset(vrect->colors, 0, sizeof(uint32_t)* num_verts);
tmp = gs_vertexbuffer_create(vrect, GS_DYNAMIC);
if (tmp == NULL) {
blog(LOG_WARNING, "Couldn't create UV vertex buffer.");
}
obs_leave_graphics();
return tmp;
}
void draw_uv_vbuffer(gs_vertbuffer_t *vbuf, gs_texture_t *tex,
gs_effect_t *effect, uint32_t num_verts)
{
gs_texture_t *texture = tex;
gs_technique_t *tech = gs_effect_get_technique(effect, "Draw");
gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
size_t passes;
if (vbuf == NULL || tex == NULL) return;
gs_vertexbuffer_flush(vbuf);
gs_load_vertexbuffer(vbuf);
gs_load_indexbuffer(NULL);
passes = gs_technique_begin(tech);
for (size_t i = 0; i < passes; i++) {
if (gs_technique_begin_pass(tech, i)) {
gs_effect_set_texture(image, texture);
gs_draw(GS_TRIS, 0, num_verts);
gs_technique_end_pass(tech);
}
}
gs_technique_end(tech);
}