RomanNum3ral
/
open_toontown_panda3d
mirror of https://github.com/open-toontown/panda3d.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PNMImage::indirect_1d_lookup()

This commit is contained in:
David Rose 2016-01-11 13:27:18 -08:00
parent 059c929b79
commit ea07322b1d
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
panda/src/pnmimage/pnmImage.cxx
View File

@ -1796,6 +1796,43 @@ fill_distance_outside(const PNMImage &mask, float threshold, int radius) {
take_from(dist);
}
////////////////////////////////////////////////////////////////////
// Function: PNMImage::indirect_1d_lookup
// Access: Published
// Description: index_image is a WxH grayscale image, while
// pixel_values is an Nx1 color (or grayscale) image.
// Typically pixel_values will be a 256x1 image.
//
// Fills the PNMImage with a new image the same width
// and height as index_image, with the same number of
// channels as pixel_values.
//
// Each pixel of the new image is computed with the
// formula:
//
// new_image(x, y) = pixel_values(index_image(x, y)[channel], 0)
//
// No interpolation is performed; the nearest value in
// pixel_values is discovered.
////////////////////////////////////////////////////////////////////
void PNMImage::
indirect_1d_lookup(const PNMImage &index_image, int channel,
const PNMImage &pixel_values) {
clear(index_image.get_x_size(), index_image.get_y_size(),
pixel_values.get_num_channels(), pixel_values.get_maxval());
for (int yi = 0; yi < get_y_size(); ++yi) {
for (int xi = 0; xi < get_x_size(); ++xi) {
int v = int(index_image.get_channel(xi, yi, channel) * (pixel_values.get_x_size() - 1) + 0.5);
nassertv(v >= 0 && v < pixel_values.get_x_size());
set_xel_val(xi, yi, pixel_values.get_xel_val(v, 0));
if (has_alpha()) {
set_alpha_val(xi, yi, pixel_values.get_alpha_val(v, 0));
}
}
}
}
////////////////////////////////////////////////////////////////////
// Function: PNMImage::rescale
// Access: Published

3
panda/src/pnmimage/pnmImage.h
View File

@ -236,6 +236,9 @@ PUBLISHED:
BLOCKING void fill_distance_inside(const PNMImage &mask, float threshold, int radius, bool shrink_from_border);
BLOCKING void fill_distance_outside(const PNMImage &mask, float threshold, int radius);
void indirect_1d_lookup(const PNMImage &index_image, int channel,
const PNMImage &pixel_values);
void rescale(float min_val, float max_val);
void copy_channel(const PNMImage &copy, int xto, int yto, int cto,