MINLINE int len_manhattan_v2v2_int(const int a[2], const int b[2])
{
int d[2];
sub_v2_v2v2_int(d, b, a);
return len_manhattan_v2_int(d);
}
static void paint_2d_lift_soften(ImagePaintState *s, ImBuf *ibuf, ImBuf *ibufb, int *pos, const short tile)
{
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 (!tile) {
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;
if (tile) {
paint_2d_ibuf_tile_convert(ibuf, &xi, &yi, tile);
if (xi < ibuf->x && xi >= 0 && yi < ibuf->y && yi >= 0)
paint_2d_ibuf_rgb_get(ibuf, xi, yi, rgba);
else
zero_v4(rgba);
}
else {
/* coordinates have been clipped properly here, it should be safe to do this */
paint_2d_ibuf_rgb_get(ibuf, xi, yi, 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, tile,
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] = IMB_colormanagement_get_luminance(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);
}
}
}
