commit - b3453e08b88b3973f427c5bf982670bb5a09d259
commit + f2887b9de88173031f52492147ba68e5ca94f719
blob - 87c2c25ae7d8eec2967be328f90ce88e7e026ff7 (mode 644)
blob + /dev/null
--- cmd/page/cache.c
+++ /dev/null
-#include <u.h>
-#include <libc.h>
-#include <draw.h>
-#include <cursor.h>
-#include <event.h>
-#include <bio.h>
-#include <plumb.h>
-#include <ctype.h>
-#include <keyboard.h>
-#include <thread.h>
-#include "page.h"
-
-typedef struct Cached Cached;
-struct Cached
-{
- Document *doc;
- int page;
- int angle;
- Image *im;
-};
-
-static Cached cache[5];
-static int rabusy;
-
-static Image*
-questionmark(void)
-{
- static Image *im;
-
- if(im)
- return im;
- im = xallocimage(display, Rect(0,0,50,50), GREY1, 1, DBlack);
- if(im == nil)
- return nil;
- string(im, ZP, display->white, ZP, display->defaultfont, "?");
- return im;
-}
-
-void
-cacheflush(void)
-{
- int i;
- Cached *c;
-
- for(i=0; i<nelem(cache); i++){
- c = &cache[i];
- if(c->im)
- freeimage(c->im);
- c->im = nil;
- c->doc = nil;
- }
-}
-
-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;
-}
-
-static void
-raproc(void *a)
-{
- Cached *c;
-
- c = a;
- lockdisplay(display);
- _cachedpage(c->doc, c->angle, c->page, "-ra");
- rabusy = 0;
- unlockdisplay(display);
- free(c);
- threadexits(0);
-}
-
-Image*
-cachedpage(Document *doc, int angle, int page)
-{
- static int lastpage = -1;
- Cached *c;
- Image *im;
- int ra;
-
- if(doc->npage < 1)
- return display->white;
-
- im = _cachedpage(doc, angle, page, "");
- if(im == nil)
- return nil;
-
- /* readahead */
- ra = -1;
- if(!rabusy){
- if(page == lastpage+1)
- ra = page+1;
- else if(page == lastpage-1)
- ra = page-1;
- }
- lastpage = page;
- if(ra >= 0){
- c = emalloc(sizeof(*c));
- c->doc = doc;
- c->angle = angle;
- c->page = ra;
- c->im = nil;
- rabusy = 1;
- if(proccreate(raproc, c, mainstacksize) == -1)
- rabusy = 0;
- }
- return im;
-}
blob - /dev/null
blob + 87c2c25ae7d8eec2967be328f90ce88e7e026ff7 (mode 644)
--- /dev/null
+++ src/cmd/page/cache.c
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+#include <event.h>
+#include <bio.h>
+#include <plumb.h>
+#include <ctype.h>
+#include <keyboard.h>
+#include <thread.h>
+#include "page.h"
+
+typedef struct Cached Cached;
+struct Cached
+{
+ Document *doc;
+ int page;
+ int angle;
+ Image *im;
+};
+
+static Cached cache[5];
+static int rabusy;
+
+static Image*
+questionmark(void)
+{
+ static Image *im;
+
+ if(im)
+ return im;
+ im = xallocimage(display, Rect(0,0,50,50), GREY1, 1, DBlack);
+ if(im == nil)
+ return nil;
+ string(im, ZP, display->white, ZP, display->defaultfont, "?");
+ return im;
+}
+
+void
+cacheflush(void)
+{
+ int i;
+ Cached *c;
+
+ for(i=0; i<nelem(cache); i++){
+ c = &cache[i];
+ if(c->im)
+ freeimage(c->im);
+ c->im = nil;
+ c->doc = nil;
+ }
+}
+
+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;
+}
+
+static void
+raproc(void *a)
+{
+ Cached *c;
+
+ c = a;
+ lockdisplay(display);
+ _cachedpage(c->doc, c->angle, c->page, "-ra");
+ rabusy = 0;
+ unlockdisplay(display);
+ free(c);
+ threadexits(0);
+}
+
+Image*
+cachedpage(Document *doc, int angle, int page)
+{
+ static int lastpage = -1;
+ Cached *c;
+ Image *im;
+ int ra;
+
+ if(doc->npage < 1)
+ return display->white;
+
+ im = _cachedpage(doc, angle, page, "");
+ if(im == nil)
+ return nil;
+
+ /* readahead */
+ ra = -1;
+ if(!rabusy){
+ if(page == lastpage+1)
+ ra = page+1;
+ else if(page == lastpage-1)
+ ra = page-1;
+ }
+ lastpage = page;
+ if(ra >= 0){
+ c = emalloc(sizeof(*c));
+ c->doc = doc;
+ c->angle = angle;
+ c->page = ra;
+ c->im = nil;
+ rabusy = 1;
+ if(proccreate(raproc, c, mainstacksize) == -1)
+ rabusy = 0;
+ }
+ return im;
+}