/* no profile conversion */
void IMB_color_to_bw(ImBuf *ibuf)
{
float *rct_fl = ibuf->rect_float;
uchar *rct = (uchar *)ibuf->rect;
int i;
if (rct_fl) {
for (i = ibuf->x * ibuf->y; i > 0; i--, rct_fl += 4)
rct_fl[0] = rct_fl[1] = rct_fl[2] = rgb_to_grayscale(rct_fl);
}
if (rct) {
for (i = ibuf->x * ibuf->y; i > 0; i--, rct += 4)
rct[0] = rct[1] = rct[2] = rgb_to_grayscale_byte(rct);
}
}
/* no profile conversion */
void IMB_color_to_bw(struct ImBuf *ibuf)
{
float *rctf= ibuf->rect_float;
unsigned char *rct= (unsigned char *)ibuf->rect;
int i;
if(rctf) {
for (i = ibuf->x * ibuf->y; i > 0; i--, rctf+=4) {
rctf[0]= rctf[1]= rctf[2]= rgb_to_grayscale(rctf);
}
}
if(rct) {
for (i = ibuf->x * ibuf->y; i > 0; i--, rct+=4) {
rct[0]= rct[1]= rct[2]= rgb_to_grayscale_byte(rct);
}
}
}
/* TODO: should probably be unified with BrushPainter stuff? */
unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side, bool use_secondary)
{
unsigned int *texcache = NULL;
MTex *mtex = (use_secondary) ? &br->mask_mtex : &br->mtex;
TexResult texres = {0};
int hasrgb, ix, iy;
int side = half_side * 2;
if (mtex->tex) {
float x, y, step = 2.0 / side, co[3];
texcache = MEM_callocN(sizeof(int) * side * side, "Brush texture cache");
/* do normalized cannonical view coords for texture */
for (y = -1.0, iy = 0; iy < side; iy++, y += step) {
for (x = -1.0, ix = 0; ix < side; ix++, x += step) {
co[0] = x;
co[1] = y;
co[2] = 0.0f;
/* This is copied from displace modifier code */
/* TODO(sergey): brush are always cacheing with CM enabled for now. */
hasrgb = multitex_ext(mtex->tex, co, NULL, NULL, 0, &texres, NULL, true);
/* if the texture gave an RGB value, we assume it didn't give a valid
* intensity, so calculate one (formula from do_material_tex).
* if the texture didn't give an RGB value, copy the intensity across
*/
if (hasrgb & TEX_RGB)
texres.tin = rgb_to_grayscale(&texres.tr);
((char *)texcache)[(iy * side + ix) * 4] =
((char *)texcache)[(iy * side + ix) * 4 + 1] =
((char *)texcache)[(iy * side + ix) * 4 + 2] =
((char *)texcache)[(iy * side + ix) * 4 + 3] = (char)(texres.tin * 255.0f);
}
}
}
return texcache;
}
static void paint_2d_lift_soften(ImagePaintState *s, ImBuf *ibuf, ImBuf *ibufb, int *pos, const short is_torus)
{
bool sharpen = (s->painter->cache.invert ^ ((s->brush->flag & BRUSH_DIR_IN) != 0));
float threshold = s->brush->sharp_threshold;
int x, y, xi, yi, xo, yo, xk, yk;
float count;
int out_off[2], in_off[2], dim[2];
int diff_pos[2];
float outrgb[4];
float rgba[4];
BlurKernel *kernel = s->blurkernel;
dim[0] = ibufb->x;
dim[1] = ibufb->y;
in_off[0] = pos[0];
in_off[1] = pos[1];
out_off[0] = out_off[1] = 0;
if (!is_torus) {
IMB_rectclip(ibuf, ibufb, &in_off[0], &in_off[1], &out_off[0],
&out_off[1], &dim[0], &dim[1]);
if ((dim[0] == 0) || (dim[1] == 0))
return;
}
/* find offset inside mask buffers to sample them */
sub_v2_v2v2_int(diff_pos, out_off, in_off);
for (y = 0; y < dim[1]; y++) {
for (x = 0; x < dim[0]; x++) {
/* get input pixel */
xi = in_off[0] + x;
yi = in_off[1] + y;
count = 0.0;
paint_2d_ibuf_rgb_get(ibuf, xi, yi, is_torus, rgba);
zero_v4(outrgb);
for (yk = 0; yk < kernel->side; yk++) {
for (xk = 0; xk < kernel->side; xk++) {
count += paint_2d_ibuf_add_if(ibuf, xi + xk - kernel->pixel_len,
yi + yk - kernel->pixel_len, outrgb, is_torus,
kernel->wdata[xk + yk * kernel->side]);
}
}
if (count > 0.0f) {
mul_v4_fl(outrgb, 1.0f / (float)count);
if (sharpen) {
/* subtract blurred image from normal image gives high pass filter */
sub_v3_v3v3(outrgb, rgba, outrgb);
/* now rgba_ub contains the edge result, but this should be converted to luminance to avoid
* colored speckles appearing in final image, and also to check for threshold */
outrgb[0] = outrgb[1] = outrgb[2] = rgb_to_grayscale(outrgb);
if (fabsf(outrgb[0]) > threshold) {
float mask = BKE_brush_alpha_get(s->scene, s->brush);
float alpha = rgba[3];
rgba[3] = outrgb[3] = mask;
/* add to enhance edges */
blend_color_add_float(outrgb, rgba, outrgb);
outrgb[3] = alpha;
}
else
copy_v4_v4(outrgb, rgba);
}
}
else
copy_v4_v4(outrgb, rgba);
/* write into brush buffer */
xo = out_off[0] + x;
yo = out_off[1] + y;
paint_2d_ibuf_rgb_set(ibufb, xo, yo, 0, outrgb);
}
}
}