mirrors
/
weston
mirror of https://gitlab.freedesktop.org/wayland/weston.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

tests/color_util: add lcmsMAT3_invert() 

Needed to invert device-to-PCS color transformation matrices.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This commit is contained in:
Pekka Paalanen 2022-05-10 16:26:52 +03:00 committed by Pekka Paalanen
parent 141cd3021e
commit c76e4abb60
2 changed files with 46 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
tests/color_util.c
View File

@ -23,13 +23,17 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <math.h>
#include "color_util.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <libweston/matrix.h>
#include "color_util.h"
#include "shared/helpers.h"
static_assert(sizeof(struct color_float) == 4 * sizeof(float),
@ -288,3 +292,41 @@ process_pixel_using_pipeline(enum transfer_fn pre_curve,
cf = color_float_apply_matrix(mat, cf);
*out = color_float_apply_curve(post_curve, cf);
}
static void
weston_matrix_from_lcmsMAT3(struct weston_matrix *w, const struct lcmsMAT3 *m)
{
unsigned r, c;
/* column-major */
weston_matrix_init(w);
for (c = 0; c < 3; c++) {
for (r = 0; r < 3; r++)
w->d[c * 4 + r] = m->v[c].n[r];
}
}
static void
lcmsMAT3_from_weston_matrix(struct lcmsMAT3 *m, const struct weston_matrix *w)
{
unsigned r, c;
for (c = 0; c < 3; c++) {
for (r = 0; r < 3; r++)
m->v[c].n[r] = w->d[c * 4 + r];
}
}
void
lcmsMAT3_invert(struct lcmsMAT3 *result, const struct lcmsMAT3 *mat)
{
struct weston_matrix inv;
struct weston_matrix w;
int ret;
weston_matrix_from_lcmsMAT3(&w, mat);
ret = weston_matrix_invert(&inv, &w);
assert(ret == 0);
lcmsMAT3_from_weston_matrix(result, &inv);
}

3
tests/color_util.h
View File

@ -109,3 +109,6 @@ color_float_apply_matrix(const struct lcmsMAT3 *mat, struct color_float c);
enum transfer_fn
transfer_fn_invert(enum transfer_fn fn);
void
lcmsMAT3_invert(struct lcmsMAT3 *result, const struct lcmsMAT3 *mat);