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 ImBuf *make_waveform_view_from_ibuf_byte(ImBuf *ibuf) { ImBuf *rval = IMB_allocImBuf(ibuf->x + 3, 515, 32, IB_rect); int x, y; unsigned char *src = (unsigned char *) ibuf->rect; unsigned char *tgt = (unsigned char *) rval->rect; int w = ibuf->x + 3; int h = 515; float waveform_gamma = 0.2; unsigned char wtable[256]; wform_put_grid(tgt, w, h); for (x = 0; x < 256; x++) { wtable[x] = (unsigned char) (pow(((float) x + 1) / 256, waveform_gamma) * 255); } for (y = 0; y < ibuf->y; y++) { unsigned char *last_p = NULL; for (x = 0; x < ibuf->x; x++) { unsigned char *rgb = src + 4 * (ibuf->x * y + x); float v = (float)rgb_to_luma_byte(rgb) / 255.0f; unsigned char *p = tgt; p += 4 * (w * ((int) (v * (h - 3)) + 1) + x + 1); scope_put_pixel(wtable, p); p += 4 * w; scope_put_pixel(wtable, p); if (last_p != NULL) { wform_put_line(w, last_p, p); } last_p = p; } } wform_put_border(tgt, w, h); return rval; }