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kojima
2000-02-16 18:22:46 +00:00
parent 23c40b0540
commit a0ebed9cb2
6 changed files with 195 additions and 41 deletions
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24
wrlib/scale.c
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@@ -493,14 +493,19 @@ RSmoothScaleImage(RImage *src, unsigned new_width, unsigned new_height)
for(k = 0; k < tmp->height; ++k) {
CONTRIB *pp;
sp = src->data + src->width*k*sch;
for(i = 0; i < tmp->width; ++i) {
rweight = gweight = bweight = 0.0;
pp = contrib[i].p;
for(j = 0; j < contrib[i].n; ++j) {
rweight += sp[contrib[i].p[j].pixel] * contrib[i].p[j].weight;
gweight += sp[contrib[i].p[j].pixel+1] * contrib[i].p[j].weight;
bweight += sp[contrib[i].p[j].pixel+2] * contrib[i].p[j].weight;
rweight += sp[pp[j].pixel] * pp[j].weight;
gweight += sp[pp[j].pixel+1] * pp[j].weight;
bweight += sp[pp[j].pixel+2] * pp[j].weight;
}
*p++ = CLAMP(rweight, 0, 255);
*p++ = CLAMP(gweight, 0, 255);
@@ -570,6 +575,8 @@ RSmoothScaleImage(RImage *src, unsigned new_width, unsigned new_height)
sp = malloc(tmp->height*3);
for(k = 0; k < new_width; ++k) {
CONTRIB *pp;
p = dst->data + k*3;
/* copy a column into a row */
@@ -587,10 +594,13 @@ RSmoothScaleImage(RImage *src, unsigned new_width, unsigned new_height)
}
for(i = 0; i < new_height; ++i) {
rweight = gweight = bweight = 0.0;
pp = contrib[i].p;
for(j = 0; j < contrib[i].n; ++j) {
rweight += sp[contrib[i].p[j].pixel] * contrib[i].p[j].weight;
gweight += sp[contrib[i].p[j].pixel+1] * contrib[i].p[j].weight;
bweight += sp[contrib[i].p[j].pixel+2] * contrib[i].p[j].weight;
rweight += sp[pp[j].pixel] * pp[j].weight;
gweight += sp[pp[j].pixel+1] * pp[j].weight;
bweight += sp[pp[j].pixel+2] * pp[j].weight;
}
*p = CLAMP(rweight, 0, 255);
*(p+1) = CLAMP(gweight, 0, 255);