X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?p=ypp-sc-tools.main.git;a=blobdiff_plain;f=pctb%2Fpages.c;h=3eb33ce1cb402e01a630e0c29d8235edd7025628;hp=272e5cff6ab280d8e1dadafbbeff2b7a92b2554c;hb=2f6ec1e7e5b3649a58ae20211eb18511550246ae;hpb=80b5d5ede35cfb393591ed6326ca97ca23ce0c31 diff --git a/pctb/pages.c b/pctb/pages.c index 272e5cf..3eb33ce 100644 --- a/pctb/pages.c +++ b/pctb/pages.c @@ -6,16 +6,39 @@ #include #include #include +#include -#define NUM_PAGES 25 +#include +CanonImage *page_images[MAX_PAGES]; +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); } -static CanonImage *screenshot_now(Window id) { +#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); check_exitstatus(r); + free(cmd); +} + +static CanonImage *screenshot_now(void) { char *cmd; CanonImage *ci; int r; @@ -24,20 +47,155 @@ static CanonImage *screenshot_now(Window id) { eassert(r>=0); FILE *f= popen(cmd,"r"); eassert(f); ci= file_read_image(f); - r= fgetc(f); eassert(r==EOF); eassert(feof(f)); - r= pclose(f); eassert(r>=0); eassert(WIFEXITED(r) && !WEXITSTATUS(r)); - free(cmd); + check_pclose(f, cmd); return ci; } +#endif + +static void screenshot_startup(void) { + int r; + disp= XOpenDisplay(0); eassert(disp); + r= gettimeofday(&tv_startup,0); eassert(!r); +} + +#if 0 +static CanonImage *single_page(void) { + int r; + r= XRaiseWindow(disp, id); eassert(r); + r= XSync(disp, False); eassert(r); + return screenshot_now(); +} +#endif + +/*---------- pager ----------*/ + +typedef XImage Snapshot; + +//static size_t snapshot_alloc= 1024; +static double last_input; +static const double min_update_allowance= 0.5; + +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); +} -static void read_pages(Window id) { +static void sync_after_input(void) { + int r; + r= XSync(disp, False); eassert(r); + last_input= timestamp(); +} + +static void send_key(KeySym sym) { + XTestFakeKeyEvent(disp, keycode(sym),1, 10); + XTestFakeKeyEvent(disp, keycode(sym),0, 10); +} + +static void send_pgup_many(void) { + int i; + 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) { + send_key(XK_Next); + fprintf(stderr,"PAGING PageDown\n"); + sync_after_input(); +} + +static void free_snapshot(Snapshot **io) { + if (*io) XDestroyImage(*io); + *io= 0; +} + +static void snapshot(Snapshot **output) { +// char *cmd; +// int r; +// XImage *xim; + + free_snapshot(output); + + fprintf(stderr,"PAGING snapshot\n"); + + timestamp(); + *output= XGetImage(disp,id, 0,0, wwidth,wheight, AllPlanes, ZPixmap); + timestamp(); + + fprintf(stderr,"PAGING snapshot done.\n"); +} + +static int identical(const Snapshot *a, const Snapshot *b) { + 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, + const Snapshot *previously, + void (*with_keypress)(void)) { + Snapshot *last=0; + /* waits longer if we're going to return an image identical to previously + * if previously==0, all images are considered identical to it */ + + fprintf(stderr,"PAGING wait_for_stability" + " 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); + + 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(); + + delay(0.5); + } + + 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 width,height,bd,depth; + unsigned bd,depth; Window dummy; - disp= XOpenDisplay(0); eassert(disp); + fprintf(stderr,"PAGING raise_and_set_focus\n"); r= XTestQueryExtension(disp, &evbase,&errbase,&majver,&minver); eassert(r==True); @@ -45,7 +203,9 @@ static void read_pages(Window id) { r= XRaiseWindow(disp, id); eassert(r); r= XGetWindowAttributes(disp, id, &attr); eassert(r); - r= XGetGeometry(disp,id, &attr.root,&xpos,&ypos,&width,&height, &bd,&depth); + r= XGetGeometry(disp,id, &attr.root, + &xpos,&ypos, &wwidth,&wheight, + &bd,&depth); eassert(r); r= XTranslateCoordinates(disp, id,attr.root, 160,160, &xpos,&ypos, @@ -55,21 +215,126 @@ static void read_pages(Window id) { int screen= XScreenNumberOfScreen(attr.screen); XTestFakeMotionEvent(disp,screen, xpos, ypos, 0); - XTestFakeButtonEvent(disp,1,1, 0); + XTestFakeButtonEvent(disp,1,1, 50); XTestFakeButtonEvent(disp,1,0, 50); - XTestFakeKeyEvent(disp, keycode(XK_Next),1, 50); - XTestFakeKeyEvent(disp, keycode(XK_Next),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= XSync(disp, False); eassert(r); + 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(¤t,0, send_pgup_many); + + /* now to actually page down */ + for (;;) { + fprintf(stderr,"PAGING page %d\n",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_snapshot(¤t); + break; + } + + send_pgdown(); + npages++; + } + fprintf(stderr,"PAGING all done.\n"); +} + int main(int argc, char **argv) { - Window id; - CanonImage *ci; + screenshot_startup(); id= strtoul(*++argv,0,0); - read_pages(id); - ci= screenshot_now(id); + + read_pages(); return 0; } +