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/* See LICENSE file for copyright and license details. */
#include <sys/types.h>
#include <arpa/inet.h>
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#include <errno.h>
#include <fcntl.h>
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#include <math.h>
#include <regex.h>
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#include <stdarg.h>
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xft/Xft.h>
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#include "arg.h"
#include "util.h"
#include "drw.h"
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char *argv0;
/* macros */
#define LEN(a) (sizeof(a) / sizeof(a)[0])
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define MAXFONTSTRLEN 128
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typedef enum {
NONE = 0,
SCALED = 1,
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} imgstate;
typedef struct {
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unsigned char *buf;
unsigned int bufwidth, bufheight;
imgstate state;
XImage *ximg;
int numpasses;
} Image;
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typedef struct {
char *regex;
char *bin;
} Filter;
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typedef struct {
unsigned int linecount;
char **lines;
Image *img;
char *embed;
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} Slide;
/* Purely graphic info */
typedef struct {
Display *dpy;
Window win;
Atom wmdeletewin, netwmname;
Visual *vis;
XSetWindowAttributes attrs;
int scr;
int w, h;
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int uw, uh; /* usable dimensions for drawing text and images */
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} XWindow;
typedef union {
int i;
unsigned int ui;
float f;
const void *v;
} Arg;
typedef struct {
unsigned int b;
void (*func)(const Arg *);
const Arg arg;
} Mousekey;
typedef struct {
KeySym keysym;
void (*func)(const Arg *);
const Arg arg;
} Shortcut;
static void fffree(Image *img);
static void ffload(Slide *s);
static void ffprepare(Image *img);
static void ffscale(Image *img);
static void ffdraw(Image *img);
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static void getfontsize(Slide *s, unsigned int *width, unsigned int *height);
static void cleanup(int slidesonly);
static void reload(const Arg *arg);
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static void load(FILE *fp);
static void advance(const Arg *arg);
static void quit(const Arg *arg);
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static void resize(int width, int height);
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static void run();
static void usage();
static void xdraw();
static void xhints();
static void xinit();
static void xloadfonts();
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static void bpress(XEvent *);
static void cmessage(XEvent *);
static void expose(XEvent *);
static void kpress(XEvent *);
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static void configure(XEvent *);
/* config.h for applying patches and the configuration. */
#include "config.h"
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/* Globals */
static const char *fname = NULL;
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static Slide *slides = NULL;
static int idx = 0;
static int slidecount = 0;
static XWindow xw;
static Drw *d = NULL;
static Clr *sc;
static Fnt *fonts[NUMFONTSCALES];
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static int running = 1;
static void (*handler[LASTEvent])(XEvent *) = {
[ButtonPress] = bpress,
[ClientMessage] = cmessage,
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[ConfigureNotify] = configure,
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[Expose] = expose,
[KeyPress] = kpress,
};
int
filter(int fd, const char *cmd)
{
int fds[2];
if (pipe(fds) < 0)
die("sent: Unable to create pipe:");
switch (fork()) {
case -1:
die("sent: Unable to fork:");
case 0:
dup2(fd, 0);
dup2(fds[1], 1);
close(fds[0]);
close(fds[1]);
execlp("sh", "sh", "-c", cmd, (char *)0);
fprintf(stderr, "sent: execlp sh -c '%s': %s\n", cmd, strerror(errno));
_exit(1);
}
close(fds[1]);
return fds[0];
}
load slide image on-demand On Sat, Jun 04, 2016 at 05:28:31PM +0200, Markus Teich wrote: > Hiltjo Posthuma wrote: > > previously an image file would be opened but only ffread when advancing to > > the slide, but when the slide was not used it gave an error: > > > > /usr/local/bin/2ff: failed to convert image/png > > Heyho Hiltjo, > > thanks for the patch. Unfortunately it does not work if the first slide contains > an image (ffopen is only called in advance). I think it would be good to merge > ffopen and ffread instead into a single function ffload. This makes the `LOADED` > state clearer and also enforces that the fd is closed in the same function where > it is opened. This ffload function should then be called in advance() replacing > the ffread() calls if the image is not loaded yet and once in load() for the > first slide if it is an image. > Ah yes, sorry for the oversight. > If you want to take this new approach, go for it, otherwise I'll look into it > myself. > I have attached a patch that does this, I hope you'll like it. Also I'm not sure if we need the below code in advance(), I have removed it in the patch: if (slidecount > idx + 1 && slides[idx + 1].img) ffread(slides[idx + 1].img); if (0 < idx && slides[idx - 1].img) ffread(slides[idx - 1].img); That seems to preload the next and previous slide image right? A minor issue I notice also is that images seem to flicker, it uses XPutImage directly to xw.win. Maybe it can be replaced with a backbuffer then XCopyArea? What do you think? In advance() it should also not always be needed to rescale the image. -- Kind regards, Hiltjo From 97bebdcab4003f9acdfdd4bdf424449299ffd61d Mon Sep 17 00:00:00 2001 From: Hiltjo Posthuma <hiltjo@codemadness.org> Date: Sat, 4 Jun 2016 21:34:25 +0200 Subject: [PATCH] merge ffread and ffopen into one function
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void
fffree(Image *img)
{
free(img->buf);
if (img->ximg)
XDestroyImage(img->ximg);
free(img);
}
void
ffload(Slide *s)
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{
load slide image on-demand On Sat, Jun 04, 2016 at 05:28:31PM +0200, Markus Teich wrote: > Hiltjo Posthuma wrote: > > previously an image file would be opened but only ffread when advancing to > > the slide, but when the slide was not used it gave an error: > > > > /usr/local/bin/2ff: failed to convert image/png > > Heyho Hiltjo, > > thanks for the patch. Unfortunately it does not work if the first slide contains > an image (ffopen is only called in advance). I think it would be good to merge > ffopen and ffread instead into a single function ffload. This makes the `LOADED` > state clearer and also enforces that the fd is closed in the same function where > it is opened. This ffload function should then be called in advance() replacing > the ffread() calls if the image is not loaded yet and once in load() for the > first slide if it is an image. > Ah yes, sorry for the oversight. > If you want to take this new approach, go for it, otherwise I'll look into it > myself. > I have attached a patch that does this, I hope you'll like it. Also I'm not sure if we need the below code in advance(), I have removed it in the patch: if (slidecount > idx + 1 && slides[idx + 1].img) ffread(slides[idx + 1].img); if (0 < idx && slides[idx - 1].img) ffread(slides[idx - 1].img); That seems to preload the next and previous slide image right? A minor issue I notice also is that images seem to flicker, it uses XPutImage directly to xw.win. Maybe it can be replaced with a backbuffer then XCopyArea? What do you think? In advance() it should also not always be needed to rescale the image. -- Kind regards, Hiltjo From 97bebdcab4003f9acdfdd4bdf424449299ffd61d Mon Sep 17 00:00:00 2001 From: Hiltjo Posthuma <hiltjo@codemadness.org> Date: Sat, 4 Jun 2016 21:34:25 +0200 Subject: [PATCH] merge ffread and ffopen into one function
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uint32_t y, x;
uint16_t *row;
uint8_t opac, fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
size_t rowlen, off, nbytes, i;
ssize_t count;
unsigned char hdr[16];
char *bin = NULL;
char *filename;
regex_t regex;
int fdin, fdout;
if (s->img || !(filename = s->embed) || !s->embed[0])
return; /* already done */
for (i = 0; i < LEN(filters); i++) {
if (regcomp(&regex, filters[i].regex,
REG_NOSUB | REG_EXTENDED | REG_ICASE)) {
fprintf(stderr, "sent: Invalid regex '%s'\n", filters[i].regex);
continue;
}
if (!regexec(&regex, filename, 0, NULL, 0)) {
bin = filters[i].bin;
regfree(&regex);
break;
}
regfree(&regex);
}
if (!bin)
die("sent: Unable to find matching filter for '%s'", filename);
if ((fdin = open(filename, O_RDONLY)) < 0)
die("sent: Unable to open '%s':", filename);
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if ((fdout = filter(fdin, bin)) < 0)
die("sent: Unable to filter '%s':", filename);
close(fdin);
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if (read(fdout, hdr, 16) != 16)
die("sent: Unable to read filtered file '%s':", filename);
if (memcmp("farbfeld", hdr, 8))
die("sent: Filtered file '%s' has no valid farbfeld header", filename);
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s->img = ecalloc(1, sizeof(Image));
s->img->bufwidth = ntohl(*(uint32_t *)&hdr[8]);
s->img->bufheight = ntohl(*(uint32_t *)&hdr[12]);
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if (s->img->buf)
free(s->img->buf);
/* internally the image is stored in 888 format */
s->img->buf = ecalloc(s->img->bufwidth * s->img->bufheight, strlen("888"));
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/* scratch buffer to read row by row */
rowlen = s->img->bufwidth * 2 * strlen("RGBA");
row = ecalloc(1, rowlen);
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/* extract window background color channels for transparency */
bg_r = (sc[ColBg].pixel >> 16) % 256;
bg_g = (sc[ColBg].pixel >> 8) % 256;
bg_b = (sc[ColBg].pixel >> 0) % 256;
for (off = 0, y = 0; y < s->img->bufheight; y++) {
nbytes = 0;
while (nbytes < rowlen) {
count = read(fdout, (char *)row + nbytes, rowlen - nbytes);
if (count < 0)
die("sent: Unable to read from pipe:");
nbytes += count;
}
for (x = 0; x < rowlen / 2; x += 4) {
fg_r = ntohs(row[x + 0]) / 257;
fg_g = ntohs(row[x + 1]) / 257;
fg_b = ntohs(row[x + 2]) / 257;
opac = ntohs(row[x + 3]) / 257;
/* blend opaque part of image data with window background color to
* emulate transparency */
s->img->buf[off++] = (fg_r * opac + bg_r * (255 - opac)) / 255;
s->img->buf[off++] = (fg_g * opac + bg_g * (255 - opac)) / 255;
s->img->buf[off++] = (fg_b * opac + bg_b * (255 - opac)) / 255;
}
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}
free(row);
close(fdout);
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}
void
ffprepare(Image *img)
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{
int depth = DefaultDepth(xw.dpy, xw.scr);
int width = xw.uw;
int height = xw.uh;
if (xw.uw * img->bufheight > xw.uh * img->bufwidth)
width = img->bufwidth * xw.uh / img->bufheight;
else
height = img->bufheight * xw.uw / img->bufwidth;
if (depth < 24)
die("sent: Display color depths < 24 not supported");
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if (!(img->ximg = XCreateImage(xw.dpy, CopyFromParent, depth, ZPixmap, 0,
NULL, width, height, 32, 0)))
die("sent: Unable to create XImage");
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img->ximg->data = ecalloc(height, img->ximg->bytes_per_line);
if (!XInitImage(img->ximg))
die("sent: Unable to initiate XImage");
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ffscale(img);
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img->state |= SCALED;
}
void
ffscale(Image *img)
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{
unsigned int x, y;
unsigned int width = img->ximg->width;
unsigned int height = img->ximg->height;
char* newBuf = img->ximg->data;
unsigned char* ibuf;
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unsigned int jdy = img->ximg->bytes_per_line / 4 - width;
unsigned int dx = (img->bufwidth << 10) / width;
for (y = 0; y < height; y++) {
unsigned int bufx = img->bufwidth / width;
ibuf = &img->buf[y * img->bufheight / height * img->bufwidth * 3];
for (x = 0; x < width; x++) {
*newBuf++ = (ibuf[(bufx >> 10)*3+2]);
*newBuf++ = (ibuf[(bufx >> 10)*3+1]);
*newBuf++ = (ibuf[(bufx >> 10)*3+0]);
newBuf++;
bufx += dx;
}
newBuf += jdy;
}
}
void
ffdraw(Image *img)
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{
int xoffset = (xw.w - img->ximg->width) / 2;
int yoffset = (xw.h - img->ximg->height) / 2;
XPutImage(xw.dpy, xw.win, d->gc, img->ximg, 0, 0,
xoffset, yoffset, img->ximg->width, img->ximg->height);
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XFlush(xw.dpy);
}
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void
getfontsize(Slide *s, unsigned int *width, unsigned int *height)
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{
int i, j;
unsigned int curw, newmax;
float lfac = linespacing * (s->linecount - 1) + 1;
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/* fit height */
for (j = NUMFONTSCALES - 1; j >= 0; j--)
if (fonts[j]->h * lfac <= xw.uh)
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break;
LIMIT(j, 0, NUMFONTSCALES - 1);
drw_setfontset(d, fonts[j]);
/* fit width */
*width = 0;
for (i = 0; i < s->linecount; i++) {
curw = drw_fontset_getwidth(d, s->lines[i]);
newmax = (curw >= *width);
while (j > 0 && curw > xw.uw) {
drw_setfontset(d, fonts[--j]);
curw = drw_fontset_getwidth(d, s->lines[i]);
}
if (newmax)
*width = curw;
}
*height = fonts[j]->h * lfac;
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}
void
cleanup(int slidesonly)
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{
unsigned int i, j;
if (!slidesonly) {
for (i = 0; i < NUMFONTSCALES; i++)
drw_fontset_free(fonts[i]);
free(sc);
drw_free(d);
XDestroyWindow(xw.dpy, xw.win);
XSync(xw.dpy, False);
XCloseDisplay(xw.dpy);
}
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if (slides) {
for (i = 0; i < slidecount; i++) {
for (j = 0; j < slides[i].linecount; j++)
free(slides[i].lines[j]);
free(slides[i].lines);
if (slides[i].img)
fffree(slides[i].img);
}
if (!slidesonly) {
free(slides);
slides = NULL;
}
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}
}
void
reload(const Arg *arg)
{
FILE *fp = NULL;
unsigned int i;
if (!fname) {
fprintf(stderr, "sent: Cannot reload from stdin. Use a file!\n");
return;
}
cleanup(1);
slidecount = 0;
if (!(fp = fopen(fname, "r")))
die("sent: Unable to open '%s' for reading:", fname);
load(fp);
fclose(fp);
LIMIT(idx, 0, slidecount-1);
for (i = 0; i < slidecount; i++)
ffload(&slides[i]);
xdraw();
}
void
load(FILE *fp)
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{
static size_t size = 0;
size_t blen, maxlines;
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char buf[BUFSIZ], *p;
Slide *s;
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/* read each line from fp and add it to the item list */
while (1) {
/* eat consecutive empty lines */
while ((p = fgets(buf, sizeof(buf), fp)))
if (strcmp(buf, "\n") != 0 && buf[0] != '#')
break;
if (!p)
break;
if ((slidecount+1) * sizeof(*slides) >= size)
if (!(slides = realloc(slides, (size += BUFSIZ))))
die("sent: Unable to reallocate %u bytes:", size);
/* read one slide */
maxlines = 0;
memset((s = &slides[slidecount]), 0, sizeof(Slide));
do {
/* if there's a leading null, we can't do blen-1 */
if (buf[0] == '\0')
continue;
if (buf[0] == '#')
continue;
/* grow lines array */
if (s->linecount >= maxlines) {
maxlines = 2 * s->linecount + 1;
if (!(s->lines = realloc(s->lines, maxlines * sizeof(s->lines[0]))))
die("sent: Unable to reallocate %u bytes:", maxlines * sizeof(s->lines[0]));
}
blen = strlen(buf);
if (!(s->lines[s->linecount] = strdup(buf)))
die("sent: Unable to strdup:");
if (s->lines[s->linecount][blen-1] == '\n')
s->lines[s->linecount][blen-1] = '\0';
/* mark as image slide if first line of a slide starts with @ */
if (s->linecount == 0 && s->lines[0][0] == '@')
s->embed = &s->lines[0][1];
if (s->lines[s->linecount][0] == '\\')
memmove(s->lines[s->linecount], &s->lines[s->linecount][1], blen);
s->linecount++;
} while ((p = fgets(buf, sizeof(buf), fp)) && strcmp(buf, "\n") != 0);
load slide image on-demand On Sat, Jun 04, 2016 at 05:28:31PM +0200, Markus Teich wrote: > Hiltjo Posthuma wrote: > > previously an image file would be opened but only ffread when advancing to > > the slide, but when the slide was not used it gave an error: > > > > /usr/local/bin/2ff: failed to convert image/png > > Heyho Hiltjo, > > thanks for the patch. Unfortunately it does not work if the first slide contains > an image (ffopen is only called in advance). I think it would be good to merge > ffopen and ffread instead into a single function ffload. This makes the `LOADED` > state clearer and also enforces that the fd is closed in the same function where > it is opened. This ffload function should then be called in advance() replacing > the ffread() calls if the image is not loaded yet and once in load() for the > first slide if it is an image. > Ah yes, sorry for the oversight. > If you want to take this new approach, go for it, otherwise I'll look into it > myself. > I have attached a patch that does this, I hope you'll like it. Also I'm not sure if we need the below code in advance(), I have removed it in the patch: if (slidecount > idx + 1 && slides[idx + 1].img) ffread(slides[idx + 1].img); if (0 < idx && slides[idx - 1].img) ffread(slides[idx - 1].img); That seems to preload the next and previous slide image right? A minor issue I notice also is that images seem to flicker, it uses XPutImage directly to xw.win. Maybe it can be replaced with a backbuffer then XCopyArea? What do you think? In advance() it should also not always be needed to rescale the image. -- Kind regards, Hiltjo From 97bebdcab4003f9acdfdd4bdf424449299ffd61d Mon Sep 17 00:00:00 2001 From: Hiltjo Posthuma <hiltjo@codemadness.org> Date: Sat, 4 Jun 2016 21:34:25 +0200 Subject: [PATCH] merge ffread and ffopen into one function
8 years ago
slidecount++;
if (!p)
break;
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}
if (!slidecount)
die("sent: No slides in file");
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}
void
advance(const Arg *arg)
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{
int new_idx = idx + arg->i;
LIMIT(new_idx, 0, slidecount-1);
if (new_idx != idx) {
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if (slides[idx].img)
slides[idx].img->state &= ~SCALED;
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idx = new_idx;
xdraw();
}
}
void
quit(const Arg *arg)
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{
running = 0;
}
void
resize(int width, int height)
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{
xw.w = width;
xw.h = height;
xw.uw = usablewidth * width;
xw.uh = usableheight * height;
drw_resize(d, width, height);
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}
void
run()
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{
XEvent ev;
/* Waiting for window mapping */
while (1) {
XNextEvent(xw.dpy, &ev);
if (ev.type == ConfigureNotify) {
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resize(ev.xconfigure.width, ev.xconfigure.height);
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} else if (ev.type == MapNotify) {
break;
}
}
while (running) {
XNextEvent(xw.dpy, &ev);
if (handler[ev.type])
(handler[ev.type])(&ev);
}
}
void
xdraw()
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{
unsigned int height, width, i;
Image *im = slides[idx].img;
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getfontsize(&slides[idx], &width, &height);
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XClearWindow(xw.dpy, xw.win);
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if (!im) {
drw_rect(d, 0, 0, xw.w, xw.h, 1, 1);
for (i = 0; i < slides[idx].linecount; i++)
drw_text(d,
(xw.w - width) / 2,
(xw.h - height) / 2 + i * linespacing * d->fonts->h,
width,
d->fonts->h,
0,
slides[idx].lines[i],
0);
drw_map(d, xw.win, 0, 0, xw.w, xw.h);
} else {
if (!(im->state & SCALED))
ffprepare(im);
ffdraw(im);
}
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}
void
xhints()
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{
XClassHint class = {.res_name = "sent", .res_class = "presenter"};
XWMHints wm = {.flags = InputHint, .input = True};
XSizeHints *sizeh = NULL;
if (!(sizeh = XAllocSizeHints()))
die("sent: Unable to allocate size hints");
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sizeh->flags = PSize;
sizeh->height = xw.h;
sizeh->width = xw.w;
XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
XFree(sizeh);
}
void
xinit()
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{
XTextProperty prop;
unsigned int i;
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if (!(xw.dpy = XOpenDisplay(NULL)))
die("sent: Unable to open display");
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xw.scr = XDefaultScreen(xw.dpy);
xw.vis = XDefaultVisual(xw.dpy, xw.scr);
resize(DisplayWidth(xw.dpy, xw.scr), DisplayHeight(xw.dpy, xw.scr));
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xw.attrs.bit_gravity = CenterGravity;
xw.attrs.event_mask = KeyPressMask | ExposureMask | StructureNotifyMask |
ButtonMotionMask | ButtonPressMask;
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xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr),
InputOutput, xw.vis, CWBitGravity | CWEventMask,
&xw.attrs);
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xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
if (!(d = drw_create(xw.dpy, xw.scr, xw.win, xw.w, xw.h)))
die("sent: Unable to create drawing context");
sc = drw_scm_create(d, colors, 2);
drw_setscheme(d, sc);
XSetWindowBackground(xw.dpy, xw.win, sc[ColBg].pixel);
xloadfonts();
for (i = 0; i < slidecount; i++)
ffload(&slides[i]);
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XStringListToTextProperty(&argv0, 1, &prop);
XSetWMName(xw.dpy, xw.win, &prop);
XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
XFree(prop.value);
XMapWindow(xw.dpy, xw.win);
xhints();
XSync(xw.dpy, False);
}
void
xloadfonts()
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{
int i, j;
char *fstrs[LEN(fontfallbacks)];
for (j = 0; j < LEN(fontfallbacks); j++) {
fstrs[j] = ecalloc(1, MAXFONTSTRLEN);
}
for (i = 0; i < NUMFONTSCALES; i++) {
for (j = 0; j < LEN(fontfallbacks); j++) {
if (MAXFONTSTRLEN < snprintf(fstrs[j], MAXFONTSTRLEN, "%s:size=%d", fontfallbacks[j], FONTSZ(i)))
die("sent: Font string too long");
}
if (!(fonts[i] = drw_fontset_create(d, (const char**)fstrs, LEN(fstrs))))
die("sent: Unable to load any font for size %d", FONTSZ(i));
}
for (j = 0; j < LEN(fontfallbacks); j++)
if (fstrs[j])
free(fstrs[j]);
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}
void
bpress(XEvent *e)
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{
unsigned int i;
for (i = 0; i < LEN(mshortcuts); i++)
if (e->xbutton.button == mshortcuts[i].b && mshortcuts[i].func)
mshortcuts[i].func(&(mshortcuts[i].arg));
}
void
cmessage(XEvent *e)
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{
if (e->xclient.data.l[0] == xw.wmdeletewin)
running = 0;
}
void
expose(XEvent *e)
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{
if (0 == e->xexpose.count)
xdraw();
}
void
kpress(XEvent *e)
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{
unsigned int i;
KeySym sym;
sym = XkbKeycodeToKeysym(xw.dpy, (KeyCode)e->xkey.keycode, 0, 0);
for (i = 0; i < LEN(shortcuts); i++)
if (sym == shortcuts[i].keysym && shortcuts[i].func)
shortcuts[i].func(&(shortcuts[i].arg));
}
void
configure(XEvent *e)
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{
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resize(e->xconfigure.width, e->xconfigure.height);
if (slides[idx].img)
slides[idx].img->state &= ~SCALED;
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xdraw();
}
void
usage()
{
die("usage: %s [-c fgcolor] [-b bgcolor] [-f font] [file]", argv0);
}
int
main(int argc, char *argv[])
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{
FILE *fp = NULL;
ARGBEGIN {
case 'v':
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fprintf(stderr, "sent-"VERSION"\n");
return 0;
case 'f':
fontfallbacks[0] = EARGF(usage());
break;
case 'c':
colors[0] = EARGF(usage());
break;
case 'b':
colors[1] = EARGF(usage());
break;
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default:
usage();
} ARGEND
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if (!argv[0] || !strcmp(argv[0], "-"))
fp = stdin;
else if (!(fp = fopen(fname = argv[0], "r")))
die("sent: Unable to open '%s' for reading:", fname);