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expand PfmFile::merge() to support other than 3 channels, and not to fuss about NaN's in the result

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This commit is contained in:
David Rose 2016-08-29 16:43:13 -07:00
parent 78ab82b88e
commit fb6637ddac
1 changed files with 8 additions and 5 deletions
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13
panda/src/pnmimage/pfmFile.cxx
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@ -1449,17 +1449,20 @@ apply_1d_lut(int channel, const PfmFile &lut, PN_float32 x_scale) {
void PfmFile:: void PfmFile::
merge(const PfmFile &other) { merge(const PfmFile &other) {
nassertv(is_valid() && other.is_valid()); nassertv(is_valid() && other.is_valid());
nassertv(other._x_size == _x_size && other._y_size == _y_size); nassertv(other._x_size == _x_size && other._y_size == _y_size && other._num_channels == _num_channels);
if (!_has_no_data_value) { if (!_has_no_data_value) {
// Trivial no-op. // Trivial no-op.
return; return;
} }
for (int yi = 0; yi < _y_size; ++yi) { size_t point_size = _num_channels * sizeof(PN_float32);
for (int xi = 0; xi < _x_size; ++xi) { for (int y = 0; y < _y_size; ++y) {
if (!has_point(xi, yi) && other.has_point(xi, yi)) { for (int x = 0; x < _x_size; ++x) {
set_point(xi, yi, other.get_point(xi, yi)); if (!has_point(x, y) && other.has_point(x, y)) {
memcpy(&_table[(y * _x_size + x) * _num_channels],
&other._table[(y * _x_size + x) * _num_channels],
point_size);
} }
} }
} }