void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const ColorManagedViewSettings *view_settings,
const ColorManagedDisplaySettings *display_settings)
{
int i, x, y;
float *fp;
float rgb[3];
unsigned char *cp;
int x1 = 0.5f + hist->co[0][0] * ibuf->x;
int x2 = 0.5f + hist->co[1][0] * ibuf->x;
int y1 = 0.5f + hist->co[0][1] * ibuf->y;
int y2 = 0.5f + hist->co[1][1] * ibuf->y;
struct ColormanageProcessor *cm_processor = NULL;
hist->channels = 3;
hist->x_resolution = 256;
hist->xmax = 1.0f;
/* hist->ymax = 1.0f; */ /* now do this on the operator _only_ */
if (ibuf->rect == NULL && ibuf->rect_float == NULL) return;
if (ibuf->rect_float)
cm_processor = IMB_colormanagement_display_processor_new(view_settings, display_settings);
for (i = 0; i < 256; i++) {
x = (int)(0.5f + x1 + (float)i * (x2 - x1) / 255.0f);
y = (int)(0.5f + y1 + (float)i * (y2 - y1) / 255.0f);
if (x < 0 || y < 0 || x >= ibuf->x || y >= ibuf->y) {
hist->data_luma[i] = hist->data_r[i] = hist->data_g[i] = hist->data_b[i] = hist->data_a[i] = 0.0f;
}
else {
if (ibuf->rect_float) {
fp = (ibuf->rect_float + (ibuf->channels) * (y * ibuf->x + x));
copy_v3_v3(rgb, fp);
IMB_colormanagement_processor_apply_v3(cm_processor, rgb);
hist->data_luma[i] = rgb_to_luma(rgb);
hist->data_r[i] = rgb[0];
hist->data_g[i] = rgb[1];
hist->data_b[i] = rgb[2];
hist->data_a[i] = fp[3];
}
else if (ibuf->rect) {
cp = (unsigned char *)(ibuf->rect + y * ibuf->x + x);
hist->data_luma[i] = (float)rgb_to_luma_byte(cp) / 255.0f;
hist->data_r[i] = (float)cp[0] / 255.0f;
hist->data_g[i] = (float)cp[1] / 255.0f;
hist->data_b[i] = (float)cp[2] / 255.0f;
hist->data_a[i] = (float)cp[3] / 255.0f;
}
}
}
if (cm_processor)
IMB_colormanagement_processor_free(cm_processor);
}
static void scopes_update_cb(void *userdata, void *userdata_chunk, const int y, const int UNUSED(threadid))
{
const ScopesUpdateData *data = userdata;
Scopes *scopes = data->scopes;
const ImBuf *ibuf = data->ibuf;
struct ColormanageProcessor *cm_processor = data->cm_processor;
const unsigned char *display_buffer = data->display_buffer;
const int ycc_mode = data->ycc_mode;
ScopesUpdateDataChunk *data_chunk = userdata_chunk;
unsigned int *bin_lum = data_chunk->bin_lum;
unsigned int *bin_r = data_chunk->bin_r;
unsigned int *bin_g = data_chunk->bin_g;
unsigned int *bin_b = data_chunk->bin_b;
unsigned int *bin_a = data_chunk->bin_a;
float *min = data_chunk->min;
float *max = data_chunk->max;
const float *rf = NULL;
const unsigned char *rc = NULL;
const int rows_per_sample_line = ibuf->y / scopes->sample_lines;
const int savedlines = y / rows_per_sample_line;
const bool do_sample_line = (savedlines < scopes->sample_lines) && (y % rows_per_sample_line) == 0;
const bool is_float = (ibuf->rect_float != NULL);
if (is_float)
rf = ibuf->rect_float + ((size_t)y) * ibuf->x * ibuf->channels;
else {
rc = display_buffer + ((size_t)y) * ibuf->x * ibuf->channels;
}
for (int x = 0; x < ibuf->x; x++) {
float rgba[4], ycc[3], luma;
if (is_float) {
switch (ibuf->channels) {
case 4:
copy_v4_v4(rgba, rf);
IMB_colormanagement_processor_apply_v4(cm_processor, rgba);
break;
case 3:
copy_v3_v3(rgba, rf);
IMB_colormanagement_processor_apply_v3(cm_processor, rgba);
rgba[3] = 1.0f;
break;
case 2:
copy_v3_fl(rgba, rf[0]);
rgba[3] = rf[1];
break;
case 1:
copy_v3_fl(rgba, rf[0]);
rgba[3] = 1.0f;
break;
default:
BLI_assert(0);
}
}
else {
for (int c = 4; c--;)
rgba[c] = rc[c] * INV_255;
}
/* we still need luma for histogram */
luma = IMB_colormanagement_get_luminance(rgba);
/* check for min max */
if (ycc_mode == -1) {
minmax_v3v3_v3(min, max, rgba);
}
else {
rgb_to_ycc(rgba[0], rgba[1], rgba[2], &ycc[0], &ycc[1], &ycc[2], ycc_mode);
mul_v3_fl(ycc, INV_255);
minmax_v3v3_v3(min, max, ycc);
}
/* increment count for histo*/
bin_lum[get_bin_float(luma)]++;
bin_r[get_bin_float(rgba[0])]++;
bin_g[get_bin_float(rgba[1])]++;
bin_b[get_bin_float(rgba[2])]++;
bin_a[get_bin_float(rgba[3])]++;
/* save sample if needed */
if (do_sample_line) {
const float fx = (float)x / (float)ibuf->x;
const int idx = 2 * (ibuf->x * savedlines + x);
save_sample_line(scopes, idx, fx, rgba, ycc);
}
rf += ibuf->channels;
rc += ibuf->channels;
}
}
