- for (x=0; x<wwidth; x++) {
- long xrgb= XGetPixel(im_use,x,y);
- for (i=0; i<3; i++) {
- unsigned long sample=
- ((xrgb << shiftmasks[i].lshift) >> shiftmasks[i].rshift)
- & SAMPLEMASK;
- *op++= sample;
+ if (im_use->xoffset == 0 &&
+ im_use->format == ZPixmap &&
+ im_use->byte_order == LSBFirst &&
+ im_use->depth == 24 &&
+ im_use->bits_per_pixel == 32 &&
+ im_use->red_mask == 0x0000ffU &&
+ im_use->green_mask == 0x00ff00U &&
+ im_use->blue_mask == 0xff0000U) {
+ const char *p= im_use->data + y * im_use->bytes_per_line;
+// debugf("optimised copy y=%d",y);
+ for (x=0; x<wwidth; x++) {
+ *op++ = *p++;
+ *op++ = *p++;
+ *op++ = *p++;
+ p++;
+ }
+ } else {
+ for (x=0; x<wwidth; x++) {
+ long xrgb= XGetPixel(im_use,x,y);
+ for (i=0; i<3; i++) {
+ unsigned long sample=
+ ((xrgb << shiftmasks[i].lshift) >> shiftmasks[i].rshift)
+ & SAMPLEMASK;
+ *op++= sample;
+ }