int i, j;
uint8_t *pd = s->current_picture->data[0];
for(j=0; j < s->height; j++) {
+ i = s->width/4;
if (s->color_type == PNG_COLOR_TYPE_PALETTE){
- for(i=s->width/4-1; i>=0; i--) {
+ if ((s->width&3) >= 3) pd[4*i+2]= (pd[i]>>2)&3;
+ if ((s->width&3) >= 2) pd[4*i+1]= (pd[i]>>4)&3;
+ if ((s->width&3) >= 1) pd[4*i+0]= pd[i]>>6;
+ for(i--; i>=0; i--) {
pd[4*i+3]= pd[i] &3;
pd[4*i+2]= (pd[i]>>2)&3;
pd[4*i+1]= (pd[i]>>4)&3;
pd[4*i+0]= pd[i]>>6;
}
} else {
- for(i=s->width/4-1; i>=0; i--) {
+ if ((s->width&3) >= 3) pd[4*i+2]= ((pd[i]>>2)&3)*0x55;
+ if ((s->width&3) >= 2) pd[4*i+1]= ((pd[i]>>4)&3)*0x55;
+ if ((s->width&3) >= 1) pd[4*i+0]= ( pd[i]>>6 )*0x55;
+ for(i--; i>=0; i--) {
pd[4*i+3]= ( pd[i] &3)*0x55;
pd[4*i+2]= ((pd[i]>>2)&3)*0x55;
pd[4*i+1]= ((pd[i]>>4)&3)*0x55;
int i, j;
uint8_t *pd = s->current_picture->data[0];
for(j=0; j < s->height; j++) {
+ i=s->width/2;
if (s->color_type == PNG_COLOR_TYPE_PALETTE){
- for(i=s->width/2-1; i>=0; i--) {
+ if (s->width&1) pd[2*i+0]= pd[i]>>4;
+ for(i--; i>=0; i--) {
pd[2*i+1]= pd[i]&15;
pd[2*i+0]= pd[i]>>4;
}
} else {
- for(i=s->width/2-1; i>=0; i--) {
+ if (s->width&1) pd[2*i+0]= (pd[i]>>4)*0x11;
+ for(i--; i>=0; i--) {
pd[2*i+1]= (pd[i]&15)*0x11;
pd[2*i+0]= (pd[i]>>4)*0x11;
}