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Fix T40744: MIP Map is generating strange noise in texture, Blender Internal

This commit is contained in:
Sergey Sharybin 2014-08-11 17:37:56 +06:00
parent e438c450b4
commit 1ca8684911
Notes: blender-bot 2023-02-14 10:27:14 +01:00 
Referenced by issue #40744, MIP Map is generating strange noise in texture, Blender Internal.
1 changed files with 9 additions and 8 deletions
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17
source/blender/imbuf/intern/scaling.c
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@ -33,6 +33,7 @@
#include "BLI_utildefines.h"
#include "BLI_math_base.h"
#include "BLI_math_color.h"
#include "BLI_math_interp.h"
#include "MEM_guardedalloc.h"
@ -309,18 +310,18 @@ MINLINE void straight_uchar_to_premul_ushort(unsigned short result[4], const uns
MINLINE void premul_ushort_to_straight_uchar(unsigned char *result, const unsigned short color[4])
{
if (color[3] <= 255) {
result[0] = color[0] / 255;
result[1] = color[1] / 255;
result[2] = color[2] / 255;
result[3] = color[3] / 255;
result[0] = USHORTTOUCHAR(color[0]);
result[1] = USHORTTOUCHAR(color[1]);
result[2] = USHORTTOUCHAR(color[2]);
result[3] = USHORTTOUCHAR(color[3]);
}
else {
unsigned short alpha = color[3] / 255;
result[0] = color[0] / alpha;
result[1] = color[1] / alpha;
result[2] = color[2] / alpha;
result[3] = alpha;
result[0] = USHORTTOUCHAR(color[0] / alpha * 255);
result[1] = USHORTTOUCHAR(color[1] / alpha * 255);
result[2] = USHORTTOUCHAR(color[2] / alpha * 255);
result[3] = USHORTTOUCHAR(color[3]);
}
}