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Read only PNG header bytes to confirm a sprite is a PNG

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Saves about 300 ms for R_InitSkins.
This commit is contained in:
James R 2021-12-15 16:02:23 -08:00
parent 29399f6033
commit c39edbbf7f
1 changed files with 6 additions and 4 deletions
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10
src/r_things.c
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@ -286,16 +286,18 @@ boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef, UINT16
#ifndef NO_PNG_LUMPS
{
softwarepatch_t *png = W_CacheLumpNumPwad(wadnum, l, PU_STATIC);
UINT8 header[PNG_HEADER_SIZE];
size_t len = W_LumpLengthPwad(wadnum, l);
if (Picture_IsLumpPNG((UINT8 *)png, len))
W_ReadLumpHeaderPwad(wadnum, l, header, sizeof header, 0);
if (Picture_IsLumpPNG(header, len))
{
UINT8 *png = W_CacheLumpNumPwad(wadnum, l, PU_STATIC);
Picture_PNGDimensions((UINT8 *)png, &width, &height, &topoffset, &leftoffset, len);
isPNG = true;
Z_Free(png);
}
Z_Free(png);
}
if (!isPNG)