inline T Image2D<T>::rotN90 (int row, int col, int N) // Generalazed rotation by N*90 degree { if (N==0) return rot000(row,col); else if (N==1) return rot090(row,col); else if (N==2) return rot180(row,col); else if (N==3) return rot270(row,col); else return rot000(row,col); }
void transform( qiv_image *q, enum Orientation orientation) { switch (orientation) { default: return; case HFLIP: flipH(q); snprintf(infotext, sizeof infotext, "(Flipped horizontally)"); break; case VFLIP: flipV(q); snprintf(infotext, sizeof infotext, "(Flipped vertically)"); break; case ROT_180: rot180(q); snprintf(infotext, sizeof infotext, "(Turned upside down)"); break; case TRANSPOSE: transpose(q); swapWH(q); snprintf(infotext, sizeof infotext, "(Transposed)"); break; case ROT_90: rot90(q); swapWH(q); snprintf(infotext, sizeof infotext, "(Rotated left)"); break; case TRANSVERSE: transpose(q); rot180(q); swapWH(q); snprintf(infotext, sizeof infotext, "(Transversed)"); break; case ROT_270: rot270(q); swapWH(q); snprintf(infotext, sizeof infotext, "(Rotated left)"); break; } }
static Image* _cachedpage(Document *doc, int angle, int page, char *ra) { int i; Cached *c, old; Image *im, *tmp; if((page < 0 || page >= doc->npage) && !doc->fwdonly) return nil; Again: for(i=0; i<nelem(cache); i++){ c = &cache[i]; if(c->doc == doc && c->angle == angle && c->page == page){ if(chatty) fprint(2, "cache%s hit %d\n", ra, page); goto Found; } if(c->doc == nil) break; } if(i >= nelem(cache)) i = nelem(cache)-1; c = &cache[i]; if(c->im) freeimage(c->im); c->im = nil; c->doc = nil; c->page = -1; if(chatty) fprint(2, "cache%s load %d\n", ra, page); im = doc->drawpage(doc, page); if(im == nil){ if(doc->fwdonly) /* end of file */ wexits(0); im = questionmark(); if(im == nil){ Flush: if(i > 0){ cacheflush(); goto Again; } fprint(2, "out of memory: %r\n"); wexits("memory"); } return im; } if(im->r.min.x != 0 || im->r.min.y != 0){ /* translate to 0,0 */ tmp = xallocimage(display, Rect(0, 0, Dx(im->r), Dy(im->r)), im->chan, 0, DNofill); if(tmp == nil){ freeimage(im); goto Flush; } drawop(tmp, tmp->r, im, nil, im->r.min, S); freeimage(im); im = tmp; } switch(angle){ case 90: im = rot90(im); break; case 180: rot180(im); break; case 270: im = rot270(im); break; } if(im == nil) goto Flush; c->doc = doc; c->page = page; c->angle = angle; c->im = im; Found: if(chatty) fprint(2, "cache%s mtf %d @%d:", ra, c->page, i); old = *c; memmove(cache+1, cache, (c-cache)*sizeof cache[0]); cache[0] = old; if(chatty){ for(i=0; i<nelem(cache); i++) fprint(2, " %d", cache[i].page); fprint(2, "\n"); } if(chatty) fprint(2, "cache%s return %d %p\n", ra, old.page, old.im); return old.im; }