X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?a=blobdiff_plain;f=pctb%2Fpages.c;h=3eb33ce1cb402e01a630e0c29d8235edd7025628;hb=2f6ec1e7e5b3649a58ae20211eb18511550246ae;hp=14d0be20aeada9cc0088502cf39a672ff372dba1;hpb=ff4afbbcb13fe8bbdb5676fd3581754412cbbbc3;p=ypp-sc-tools.web-live.git diff --git a/pctb/pages.c b/pctb/pages.c index 14d0be2..3eb33ce 100644 --- a/pctb/pages.c +++ b/pctb/pages.c @@ -6,6 +6,9 @@ #include #include #include +#include + +#include CanonImage *page_images[MAX_PAGES]; int npages; @@ -13,20 +16,28 @@ int npages; static Window id; static Display *disp; static struct timeval tv_startup; +static unsigned wwidth, wheight; + +static XpmAttributes xpma; static KeyCode keycode(KeySym sym) { return XKeysymToKeycode(disp,sym); } +#if 0 +static void check_exitstatus(int st) { + eassert(WIFEXITED(st)); + eassert(!WEXITSTATUS(st)); +} + static void check_pclose(FILE *f, char *cmd) { int r; eassert(!ferror(f)); r= fgetc(f); eassert(r==EOF); eassert(feof(f)); - r= pclose(f); eassert(r>=0); eassert(WIFEXITED(r) && !WEXITSTATUS(r)); + r= pclose(f); eassert(r>=0); check_exitstatus(r); free(cmd); } -#if 0 static CanonImage *screenshot_now(void) { char *cmd; CanonImage *ci; @@ -56,135 +67,82 @@ static CanonImage *single_page(void) { } #endif -static void raise_and_set_focus(void) { - int r; - XWindowAttributes attr; - int xpos,ypos, evbase,errbase,majver,minver; - unsigned width,height,bd,depth; - Window dummy; - - fprintf(stderr,"PAGING raise_and_set_focus\n"); - - r= XTestQueryExtension(disp, &evbase,&errbase,&majver,&minver); - eassert(r==True); - - r= XRaiseWindow(disp, id); eassert(r); +/*---------- pager ----------*/ - r= XGetWindowAttributes(disp, id, &attr); eassert(r); - r= XGetGeometry(disp,id, &attr.root,&xpos,&ypos,&width,&height, &bd,&depth); - eassert(r); +typedef XImage Snapshot; - r= XTranslateCoordinates(disp, id,attr.root, 160,160, &xpos,&ypos, - &dummy); - eassert(r); +//static size_t snapshot_alloc= 1024; +static double last_input; +static const double min_update_allowance= 0.5; - int screen= XScreenNumberOfScreen(attr.screen); - XTestFakeMotionEvent(disp,screen, xpos, ypos, 0); +static double timestamp(void) { + struct timeval tv; + int r; + + r= gettimeofday(&tv,0); eassert(!r); + double t= (tv.tv_sec - tv_startup.tv_sec) + + (tv.tv_usec - tv_startup.tv_usec) * 1e-6; + fprintf(stderr,"%f\n",t); + return t; +} +static void delay(double need_sleep) { + int r; + fprintf(stderr,"PAGING delay %f\n",need_sleep); + r= usleep(need_sleep * 1e6); eassert(!r); +} - XTestFakeButtonEvent(disp,1,1, 50); - XTestFakeButtonEvent(disp,1,0, 50); +static void sync_after_input(void) { + int r; r= XSync(disp, False); eassert(r); - - fprintf(stderr,"PAGING raise_and_set_focus done.\n"); + last_input= timestamp(); } -/*---------- pager ----------*/ - -typedef struct { - size_t len; - unsigned char d[]; -} Snapshot; - static void send_key(KeySym sym) { - int r; XTestFakeKeyEvent(disp, keycode(sym),1, 10); XTestFakeKeyEvent(disp, keycode(sym),0, 10); - r= XSync(disp, False); eassert(r); } static void send_pgup_many(void) { int i; - fprintf(stderr,"PAGING PageUp\n"); for (i=0; i<25; i++) send_key(XK_Prior); + fprintf(stderr,"PAGING PageUp x %d\n",i); + sync_after_input(); } static void send_pgdown(void) { - fprintf(stderr,"PAGING PageDown\n"); send_key(XK_Next); + fprintf(stderr,"PAGING PageDown\n"); + sync_after_input(); } -static double timestamp(void) { - struct timeval tv; - int r; - - r= gettimeofday(&tv,0); eassert(!r); - double t= (tv.tv_sec - tv_startup.tv_sec) + - (tv.tv_usec - tv_startup.tv_usec) * 1e-6; - fprintf(stderr,"%f\n",t); - return t; +static void free_snapshot(Snapshot **io) { + if (*io) XDestroyImage(*io); + *io= 0; } -static double worst_snapshot= 0.050; -static double worst_stabilise= 0.100; -static size_t snapshot_alloc= 1024; - static void snapshot(Snapshot **output) { - char *cmd; - int r; +// char *cmd; +// int r; +// XImage *xim; - free(*output); *output=0; - double a= timestamp(); + free_snapshot(output); fprintf(stderr,"PAGING snapshot\n"); - r= asprintf(&cmd, "xwd -silent -id 0x%lx", (unsigned long)id); eassert(r>=0); - FILE *f= popen(cmd,"r"); eassert(f); - - int need_alloc=1; - size_t used=0; - for (;;) { - size_t allow= snapshot_alloc - used; - if (!allow) { - snapshot_alloc <<= 1; - need_alloc= 1; - fprintf(stderr,"PAGING snapshot grow %ld\n", (long)snapshot_alloc); - continue; - } - if (need_alloc) { - *output= realloc(*output, sizeof(**output) + snapshot_alloc); - eassert(*output); - need_alloc= 0; - } - size_t got= fread((*output)->d, 1, allow, f); - if (got==0) break; - used += got; - } - check_pclose(f,cmd); - - (*output)->len= used; - snapshot_alloc= used+1; - *output= realloc(*output, sizeof(**output) + snapshot_alloc); - eassert(*output); + timestamp(); + *output= XGetImage(disp,id, 0,0, wwidth,wheight, AllPlanes, ZPixmap); + timestamp(); - double b= timestamp(); - double it_took= b-a; - if (it_took > worst_snapshot) - worst_snapshot= it_took; - - fprintf(stderr,"PAGING snapshot took=%f len=%ld\n", - it_took, (long)used); -} - -static void snapshot_idle(void) { - int r; - r= usleep(worst_snapshot * 1e6 * 0.5); - /* spend no more than 2/3 of our time constantly snapshotting */ - eassert(!r); + fprintf(stderr,"PAGING snapshot done.\n"); } static int identical(const Snapshot *a, const Snapshot *b) { - return !(memcmp(a, b, sizeof(*a)) || - memcmp(a->d, b->d, a->len)); + if (!(a->width == b->width && + a->height == b->height && + a->bytes_per_line == b->bytes_per_line && + a->format == b->format)) + return 0; + return !memcmp(a->data, b->data, a->bytes_per_line * a->height); } static void wait_for_stability(Snapshot **output, @@ -194,83 +152,179 @@ static void wait_for_stability(Snapshot **output, /* waits longer if we're going to return an image identical to previously * if previously==0, all images are considered identical to it */ - double when_started= timestamp(); - double last_change= when_started; - double it_took= -1; - fprintf(stderr,"PAGING wait_for_stability" - " worst_snapshot=%f worst_stabilise=%f previously=%p\n", - worst_snapshot, worst_stabilise, previously); + " last_input=%f previously=%p\n", + last_input, previously); for (;;) { double at_snapshot= timestamp(); + double need_sleep= min_update_allowance - (at_snapshot - last_input); + if (need_sleep > 0) { delay(need_sleep); continue; } + snapshot(output); - double right_now= timestamp(); - - if (!last) { - fprintf(stderr,"PAGING wait_for_stability first...\n"); - last_change= when_started= right_now; - last=*output; *output=0; - } else if (!identical(*output,last)) { - fprintf(stderr,"PAGING wait_for_stability changed...\n"); - last_change= right_now; - free(last); last=*output; *output=0; - it_took= -1; - } else { - if (it_took<0) - it_took= at_snapshot - when_started; - - double threshold= worst_stabilise + worst_snapshot; - if (!previously || identical(*output,previously)) - threshold *= 2; threshold += 1.5; - - double stable_for= right_now - last_change; - fprintf(stderr,"PAGING wait_for_stability" - " worst_snapshot=%f worst_stabilise=%f" - " it_took=%f stable_for=%f threshold=%f...\n", - worst_snapshot, worst_stabilise, - it_took, stable_for, threshold); - - if (stable_for > threshold) - break; + + if (!with_keypress && + !(previously && identical(*output,previously))) { + fprintf(stderr,"PAGING wait_for_stability simple\n"); + break; + } + + if (last && identical(*output,last)) { + fprintf(stderr,"PAGING wait_for_stability stabilised\n"); + break; } + + fprintf(stderr,"PAGING wait_for_stability retry\n"); + + free_snapshot(&last); last=*output; *output=0; + if (with_keypress) with_keypress(); - snapshot_idle(); - } - if (!with_keypress && it_took > worst_stabilise) - worst_stabilise= it_took; + delay(0.5); + } - free(last); + free_snapshot(&last); fprintf(stderr,"PAGING wait_for_stability done.\n"); } +static void raise_and_set_focus(void) { + int r; + XWindowAttributes attr; + int xpos,ypos, evbase,errbase,majver,minver; + unsigned bd,depth; + Window dummy; + + fprintf(stderr,"PAGING raise_and_set_focus\n"); + + r= XTestQueryExtension(disp, &evbase,&errbase,&majver,&minver); + eassert(r==True); + + r= XRaiseWindow(disp, id); eassert(r); + + r= XGetWindowAttributes(disp, id, &attr); eassert(r); + r= XGetGeometry(disp,id, &attr.root, + &xpos,&ypos, &wwidth,&wheight, + &bd,&depth); + eassert(r); + + r= XTranslateCoordinates(disp, id,attr.root, 160,160, &xpos,&ypos, + &dummy); + eassert(r); + + int screen= XScreenNumberOfScreen(attr.screen); + XTestFakeMotionEvent(disp,screen, xpos, ypos, 0); + + XTestFakeButtonEvent(disp,1,1, 50); + XTestFakeButtonEvent(disp,1,0, 50); + + sync_after_input(); + fprintf(stderr,"PAGING raise_and_set_focus done.\n"); +} + +static void store_page(int pageno, Snapshot *sn) { + pid_t converter, paster; + eassert(pageno < MAX_PAGES); + int paste[2], results[2]; + FILE *err; + int r; + + eassert(!fflush(stdout)); + eassert(!fflush(stderr)); + + r= pipe(paste); eassert(!r); + r= pipe(results); eassert(!r); + err= tmpfile(); eassert(err); + + converter= fork(); eassert(converter!=-1); + if (!converter) { + r= dup2(paste[0],0); eassert(r==0); + r= dup2(results[1],1); eassert(r==1); + r= dup2(2,4); eassert(r==4); /* fileno(errn) > 4, see above */ + r= dup2(fileno(err),2); eassert(r==2); + close(paste[0]); + close(paste[1]); + close(results[0]); + close(results[1]); + execlp("xpmtoppm", "xpmtoppm",(char*)0); + dup2(4,2); + eassert(!"xpmtoppm exec failure"); + } + + char *xpmdata=0; + r= XpmCreateBufferFromImage(disp, &xpmdata, sn, 0, &xpma); + eassert(!r); + eassert(xpmdata); + + paster= fork(); eassert(paster!=-1); + if (!paster) { + FILE *f= fdopen(paste[1],"w"); eassert(f); + close(paste[0]); + close(results[0]); + close(results[1]); + r= fputs(xpmdata,f); eassert(r!=EOF); + //size_t did= fwrite(sn->d, 1, sn->len, f); + //eassert(did==sn->len); + eassert(!fclose(f)); + exit(0); + } + + close(paste[0]); + close(paste[1]); + close(results[1]); + + XpmFree(xpmdata); + + FILE *f= fdopen(results[0],"r"); + int c1= fgetc(f); + if (c1!=EOF) { + ungetc(c1,f); + page_images[pageno]= file_read_image(f); + r= fgetc(f); eassert(r==EOF); eassert(!ferror(f)); eassert(feof(f)); + fclose(f); + } + + pid_t got_conv,got_paste; + int st_conv, st_paste; + + got_conv= waitpid(converter,&st_conv,0); eassert(got_conv==converter); + got_paste= waitpid(paster,&st_paste,0); eassert(got_paste==paster); + + if (!st_conv && + (!st_paste || (WIFSIGNALED(st_paste) && WTERMSIG(st_paste)==SIGPIPE)) + && c1!=EOF) { + fclose(err); + return; + } + rewind(err); int c; while ((c=getc(err))!=EOF) fputc(c,stderr); + fprintf(stderr, "convert: subprocess statuses: %d %d\n", st_conv, st_paste); + _exit(127); +} + static void read_pages(void) { Snapshot *current=0, *last=0; raise_and_set_focus(); /* page to the top - keep pressing page up until the image stops changing */ - wait_for_stability(&last,0, send_pgup_many); + wait_for_stability(¤t,0, send_pgup_many); /* now to actually page down */ for (;;) { fprintf(stderr,"PAGING page %d\n",npages); - //eassert(npages < MAX_PAGES); - //page_images[npages++]= - npages++; + store_page(npages, current); + free_snapshot(&last); last=current; current=0; + fprintf(stderr,"PAGING page %d converted\n",npages); wait_for_stability(¤t,last, 0); if (npages && /* first pagedown doesn't do much */ identical(current,last)) { - free(current); + free_snapshot(¤t); break; } - free(last); last=current; current=0; - send_pgdown(); + npages++; } fprintf(stderr,"PAGING all done.\n"); }