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gobj: handle infinity and NaN when peeking half float values

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rdb 2018-09-02 10:56:20 +02:00
parent c4fe1ed883
commit c670cd45d9
1 changed files with 7 additions and 2 deletions
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9
panda/src/gobj/texture.I
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@ -2390,8 +2390,13 @@ get_half_float(const unsigned char *&p) {
uint32_t t3 = in & 0x7c00; // Exponent
t1 <<= 13; // Align mantissa on MSB
t2 <<= 16; // Shift sign bit into position
t1 += 0x38000000; // Adjust bias
t1 = (t3 == 0 ? 0 : t1); // Denormals-as-zero
if (t3 != 0x7c00) {
t1 += 0x38000000; // Adjust bias
t1 = (t3 == 0 ? 0 : t1); // Denormals-as-zero
} else {
// Infinity / NaN
t1 |= 0x7f800000;
}
t1 |= t2; // Re-insert sign bit
v.ui = t1;
return v.uf;