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.
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/******************************************************************************
|
|
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.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/>.
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* This is a set of helper functions to more easily render to textures
|
|
* without having to duplicate too much code.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include "graphics.h"
|
|
|
|
struct gs_texture_render {
|
|
gs_texture_t *target, *prev_target;
|
|
gs_zstencil_t *zs, *prev_zs;
|
|
|
|
uint32_t cx, cy;
|
|
|
|
enum gs_color_format format;
|
|
enum gs_zstencil_format zsformat;
|
|
|
|
bool rendered;
|
|
};
|
|
|
|
gs_texrender_t *gs_texrender_create(enum gs_color_format format,
|
|
enum gs_zstencil_format zsformat)
|
|
{
|
|
struct gs_texture_render *texrender;
|
|
texrender = bzalloc(sizeof(struct gs_texture_render));
|
|
texrender->format = format;
|
|
texrender->zsformat = zsformat;
|
|
|
|
return texrender;
|
|
}
|
|
|
|
void gs_texrender_destroy(gs_texrender_t *texrender)
|
|
{
|
|
if (texrender) {
|
|
gs_texture_destroy(texrender->target);
|
|
gs_zstencil_destroy(texrender->zs);
|
|
bfree(texrender);
|
|
}
|
|
}
|
|
|
|
static bool texrender_resetbuffer(gs_texrender_t *texrender, uint32_t cx,
|
|
uint32_t cy)
|
|
{
|
|
if (!texrender)
|
|
return false;
|
|
|
|
gs_texture_destroy(texrender->target);
|
|
gs_zstencil_destroy(texrender->zs);
|
|
|
|
texrender->target = NULL;
|
|
texrender->zs = NULL;
|
|
texrender->cx = cx;
|
|
texrender->cy = cy;
|
|
|
|
texrender->target = gs_texture_create(cx, cy, texrender->format,
|
|
1, NULL, GS_RENDER_TARGET);
|
|
if (!texrender->target)
|
|
return false;
|
|
|
|
if (texrender->zsformat != GS_ZS_NONE) {
|
|
texrender->zs = gs_zstencil_create(cx, cy, texrender->zsformat);
|
|
if (!texrender->zs) {
|
|
gs_texture_destroy(texrender->target);
|
|
texrender->target = NULL;
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool gs_texrender_begin(gs_texrender_t *texrender, uint32_t cx, uint32_t cy)
|
|
{
|
|
if (!texrender || texrender->rendered)
|
|
return false;
|
|
|
|
if (cx == 0)
|
|
cx = gs_get_width();
|
|
if (cy == 0)
|
|
cy = gs_get_height();
|
|
|
|
assert(cx && cy);
|
|
if (!cx || !cy)
|
|
return false;
|
|
|
|
if (texrender->cx != cx || texrender->cy != cy)
|
|
if (!texrender_resetbuffer(texrender, cx, cy))
|
|
return false;
|
|
|
|
gs_viewport_push();
|
|
gs_projection_push();
|
|
gs_matrix_push();
|
|
gs_matrix_identity();
|
|
|
|
texrender->prev_target = gs_get_render_target();
|
|
texrender->prev_zs = gs_get_zstencil_target();
|
|
gs_set_render_target(texrender->target, texrender->zs);
|
|
|
|
gs_set_viewport(0, 0, texrender->cx, texrender->cy);
|
|
|
|
return true;
|
|
}
|
|
|
|
void gs_texrender_end(gs_texrender_t *texrender)
|
|
{
|
|
if (!texrender)
|
|
return;
|
|
|
|
gs_set_render_target(texrender->prev_target, texrender->prev_zs);
|
|
|
|
gs_matrix_pop();
|
|
gs_projection_pop();
|
|
gs_viewport_pop();
|
|
|
|
texrender->rendered = true;
|
|
}
|
|
|
|
void gs_texrender_reset(gs_texrender_t *texrender)
|
|
{
|
|
if (texrender)
|
|
texrender->rendered = false;
|
|
}
|
|
|
|
gs_texture_t *gs_texrender_get_texture(gs_texrender_t *texrender)
|
|
{
|
|
return texrender ? texrender->target : NULL;
|
|
}
|