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PfmFile::apply_1d_lut()

This commit is contained in:
David Rose 2015-10-07 16:52:11 -07:00
parent 205e731c4a
commit caf3a9f24c
2 changed files with 28 additions and 0 deletions
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26
panda/src/pnmimage/pfmFile.cxx
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@ -1439,6 +1439,32 @@ reverse_distort(const PfmFile &dist, PN_float32 scale_factor) {
_table.swap(result._table);
}
////////////////////////////////////////////////////////////////////
// Function: PfmFile::apply_1d_lut
// Access: Published
// Description: Assumes that lut is an X by 1, 1-component PfmFile
// whose X axis maps points to target points. For each
// point in this pfm file, computes: p(u, v)[channel] =
// lut(p(u, v)[channel] * x_scale, 0)[0]
////////////////////////////////////////////////////////////////////
void PfmFile::
apply_1d_lut(int channel, const PfmFile &lut, PN_float32 x_scale) {
for (int yi = 0; yi < _y_size; ++yi) {
for (int xi = 0; xi < _x_size; ++xi) {
if (!has_point(xi, yi)) {
continue;
}
PN_float32 v = get_channel(xi, yi, channel);
LPoint3f p;
if (!lut.calc_bilinear_point(p, v * x_scale, 0.5)) {
continue;
}
set_channel(xi, yi, channel, p[0]);
}
}
}
////////////////////////////////////////////////////////////////////
// Function: PfmFile::merge
// Access: Published

2
panda/src/pnmimage/pfmFile.h
View File

@ -122,6 +122,8 @@ PUBLISHED:
INLINE BLOCKING void xform(const LMatrix4d &transform);
BLOCKING void forward_distort(const PfmFile &dist, PN_float32 scale_factor = 1.0);
BLOCKING void reverse_distort(const PfmFile &dist, PN_float32 scale_factor = 1.0);
BLOCKING void apply_1d_lut(int channel, const PfmFile &lut, PN_float32 x_scale = 1.0);
BLOCKING void merge(const PfmFile &other);
BLOCKING void apply_mask(const PfmFile &other);
BLOCKING void copy_channel(int to_channel, const PfmFile &other, int from_channel);