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render/color: Add wlr_color_transform_create_from_gamma_lut

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This commit is contained in:
Alexander Orzechowski 2024-08-24 18:52:17 -04:00
parent 3a5dd80d20
commit d4b4a3e57e
2 changed files with 37 additions and 0 deletions
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7
include/wlr/render/color.h
View file

@ -10,6 +10,7 @@
#define WLR_RENDER_COLOR_H
#include <stdbool.h>
#include <stdint.h>
#include <sys/types.h>
/**
@ -52,4 +53,10 @@ struct wlr_color_transform *wlr_color_transform_ref(struct wlr_color_transform *
*/
void wlr_color_transform_unref(struct wlr_color_transform *tr);
/**
* Creates a color transform based on a gamma ramp.
*/
struct wlr_color_transform *wlr_color_transform_create_from_gamma_lut(
size_t ramp_size, const uint16_t *r, const uint16_t *g, const uint16_t *b);
#endif

30
render/color.c
View file

@ -1,5 +1,6 @@
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <wlr/render/color.h>
#include "render/color.h"
@ -49,6 +50,35 @@ void wlr_color_transform_unref(struct wlr_color_transform *tr) {
}
}
struct wlr_color_transform *wlr_color_transform_create_from_gamma_lut(
size_t ramp_size, const uint16_t *r, const uint16_t *g, const uint16_t *b) {
uint16_t *data = malloc(3 * ramp_size * sizeof(uint16_t));
if (!data) {
return NULL;
}
struct wlr_color_transform_lut3x1d *tx = calloc(1, sizeof(*tx));
if (!tx) {
free(data);
return NULL;
}
tx->base.type = COLOR_TRANSFORM_LUT_3x1D;
tx->base.ref_count = 1;
wlr_addon_set_init(&tx->base.addons);
tx->r = data;
tx->g = data + ramp_size;
tx->b = data + ramp_size * 2;
tx->ramp_size = ramp_size;
memcpy(tx->r, r, ramp_size * sizeof(uint16_t));
memcpy(tx->g, g, ramp_size * sizeof(uint16_t));
memcpy(tx->b, b, ramp_size * sizeof(uint16_t));
return &tx->base;
}
struct wlr_color_transform_lut3d *wlr_color_transform_lut3d_from_base(
struct wlr_color_transform *tr) {
assert(tr->type == COLOR_TRANSFORM_LUT_3D);