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Fix for bug #8595: texture mipmaps with gauss filter didn't work correct,

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gave black borders.
This commit is contained in:
Brecht Van Lommel 2008-03-26 22:14:40 +00:00
parent 4e941b2eb7
commit 5b6763fec3
1 changed files with 33 additions and 16 deletions
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49
source/blender/imbuf/intern/filter.c
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@ -206,29 +206,46 @@ void imb_filterx(struct ImBuf *ibuf)
void IMB_filterN(ImBuf *out, ImBuf *in)
{
register char *row1, *row2, *row3;
register char *cp;
register char *cp, *r11, *r13, *r21, *r23, *r31, *r33;
int rowlen, x, y;
rowlen= in->x;
for(y=2; y<in->y; y++) {
for(y=0; y<in->y; y++) {
/* setup rows */
row1= (char *)(in->rect + (y-2)*rowlen);
row2= row1 + 4*rowlen;
row3= row2 + 4*rowlen;
row2= (char*)(in->rect + y*rowlen);
row1= (y == 0)? row2: row2 - 4*rowlen;
row3= (y == in->y-1)? row2: row2 + 4*rowlen;
cp= (char *)(out->rect + (y-1)*rowlen);
cp[0]= row2[0];
cp[1]= row2[1];
cp[2]= row2[2];
cp[3]= row2[3];
cp+= 4;
cp= (char *)(out->rect + y*rowlen);
for(x=2; x<rowlen; x++) {
cp[0]= (row1[0] + 2*row1[4] + row1[8] + 2*row2[0] + 4*row2[4] + 2*row2[8] + row3[0] + 2*row3[4] + row3[8])>>4;
cp[1]= (row1[1] + 2*row1[5] + row1[9] + 2*row2[1] + 4*row2[5] + 2*row2[9] + row3[1] + 2*row3[5] + row3[9])>>4;
cp[2]= (row1[2] + 2*row1[6] + row1[10] + 2*row2[2] + 4*row2[6] + 2*row2[10] + row3[2] + 2*row3[6] + row3[10])>>4;
cp[3]= (row1[3] + 2*row1[7] + row1[11] + 2*row2[3] + 4*row2[7] + 2*row2[11] + row3[3] + 2*row3[7] + row3[11])>>4;
for(x=0; x<rowlen; x++) {
if(x == 0) {
r11 = row1;
r21 = row1;
r31 = row1;
}
else {
r11 = row1-4;
r21 = row1-4;
r31 = row1-4;
}
if(x == rowlen-1) {
r13 = row1;
r23 = row1;
r33 = row1;
}
else {
r13 = row1+4;
r23 = row1+4;
r33 = row1+4;
}
cp[0]= (r11[0] + 2*row1[0] + r13[0] + 2*r21[0] + 4*row2[0] + 2*r23[0] + r31[0] + 2*row3[0] + r33[0])>>4;
cp[1]= (r11[1] + 2*row1[1] + r13[1] + 2*r21[1] + 4*row2[1] + 2*r23[1] + r31[1] + 2*row3[1] + r33[1])>>4;
cp[2]= (r11[2] + 2*row1[2] + r13[2] + 2*r21[2] + 4*row2[2] + 2*r23[2] + r31[2] + 2*row3[2] + r33[2])>>4;
cp[3]= (r11[3] + 2*row1[3] + r13[3] + 2*r21[3] + 4*row2[3] + 2*r23[3] + r31[3] + 2*row3[3] + r33[3])>>4;
cp+=4; row1+=4; row2+=4; row3+=4;
}
}