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fix image -= colour

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rdb 2010-10-31 13:23:00 +00:00
parent 3c2a961ee3
commit 44bf0582cf
1 changed files with 22 additions and 1 deletions
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23
panda/src/pnmimage/pnmImage.cxx
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@ -1529,7 +1529,28 @@ operator -= (const PNMImage &other) {
////////////////////////////////////////////////////////////////////
void PNMImage::
operator -= (const Colord &other) {
(*this) += (-other);
size_t array_size = _x_size * _y_size;
xel subxel (to_val(other.get_x()), to_val(other.get_y()), to_val(other.get_z()));
xelval subalpha = to_val(other.get_w());
if (_array != NULL && _alpha != NULL) {
for (size_t i = 0; i < array_size; ++i) {
_array[i].r = clamp_val(_array[i].r - subxel.r);
_array[i].g = clamp_val(_array[i].g - subxel.g);
_array[i].b = clamp_val(_array[i].b - subxel.b);
_alpha[i] = clamp_val(_alpha[i] + subalpha);
}
} else if (_array != NULL) {
for (size_t i = 0; i < array_size; ++i) {
_array[i].r = clamp_val(_array[i].r - subxel.r);
_array[i].g = clamp_val(_array[i].g - subxel.g);
_array[i].b = clamp_val(_array[i].b - subxel.b);
}
} else if (_alpha != NULL) {
for (size_t i = 0; i < array_size; ++i) {
_alpha[i] = clamp_val(_alpha[i] - subalpha);
}
}
}
////////////////////////////////////////////////////////////////////