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fix to new bc5 path

This commit is contained in:
Sean Barrett 2017-03-03 11:12:41 -08:00
parent def6a1898c
commit ee19531f68
1 changed files with 6 additions and 5 deletions
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11
stb_dxt.h
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@ -1,4 +1,4 @@
// stb_dxt.h - v1.05 - DXT1/DXT5 compressor - public domain
// stb_dxt.h - v1.06 - DXT1/DXT5 compressor - public domain
// original by fabian "ryg" giesen - ported to C by stb
// use '#define STB_DXT_IMPLEMENTATION' before including to create the implementation
//
@ -9,6 +9,7 @@
// and "high quality" using mode.
//
// version history:
// v1.06 - (stb) fix to known-broken 1.05
// v1.05 - (stb) support bc5/3dc (Arvids Kokins), use extern "C" in C++ (Pavel Krajcevski)
// v1.04 - (ryg) default to no rounding bias for lerped colors (as per S3TC/DX10 spec);
// single color match fix (allow for inexact color interpolation);
@ -35,7 +36,7 @@ extern "C" {
#endif
void stb_compress_dxt_block(unsigned char *dest, const unsigned char *src_rgba_four_bytes_per_pixel, int alpha, int mode);
void stb_compress_bc5_block(unsigned char *dest, const unsigned char *src_rg_two_byte_per_pixel, int mode);
void stb_compress_bc5_block(unsigned char *dest, const unsigned char *src_rg_two_byte_per_pixel);
#ifdef __cplusplus
}
@ -553,12 +554,12 @@ static void stb__CompressAlphaBlock(unsigned char *dest,unsigned char *src, int
// find min/max color
int mn,mx;
mn = mx = src[3];
mn = mx = src[0];
for (i=1;i<16;i++)
{
if (src[i*4+3] < mn) mn = src[i*4+3];
else if (src[i*4+3] > mx) mx = src[i*4+3];
if (src[i*stride] < mn) mn = src[i*stride];
else if (src[i*stride] > mx) mx = src[i*stride];
}
// encode them