325a326
>                       int l = (width*3+3)&(~3);
327,329c328,330
<                       char* r = data + (height-i-1)*width*3 + 2;
<                       char* g = data + (height-i-1)*width*3 + 1;
<                       char* b = data + (height-i-1)*width*3;
---
>                       char* r = data + (height-i-1)*l + 2;
>                       char* g = data + (height-i-1)*l + 1;
>                       char* b = data + (height-i-1)*l;
344a346
>                       int l = (width*3+3)&(~3);
346,349c348,351
<                       char* r = data + (height-i-1)*(width*3+1) + 2;
<                       char* g = data + (height-i-1)*(width*3+1) + 1;
<                       char* b = data + (height-i-1)*(width*3+1) + 0;
<                       char* a = data + height*(width*3+1) + (height-i-1)*width
;
---
>                       char* r = data + (height-i-1)*l + 2;
>                       char* g = data + (height-i-1)*l + 1;
>                       char* b = data + (height-i-1)*l + 0;
>                       char* a = data + height*l + (height-i-1)*width;