Who needs threads to load thumbnails?

Makefile

@@ -1,12 +1,12 @@
 all: sxiv
 
-VERSION=git-20110216
+VERSION=git-20110217
 
 CC?=gcc
 PREFIX?=/usr/local
 CFLAGS+= -Wall -pedantic -DVERSION=\"$(VERSION)\"
 LDFLAGS+= 
-LIBS+= -lX11 -lImlib2 -lpthread
+LIBS+= -lX11 -lImlib2
 
 SRCFILES=$(wildcard *.c)
 OBJFILES=$(SRCFILES:.c=.o)

main.c

@@ -54,6 +54,8 @@ const char **filenames;
 int filecnt, fileidx;
 size_t filesize;
 
+int tns_loaded;
+
 #define TITLE_LEN 256
 char win_title[TITLE_LEN];
 
@@ -128,13 +130,13 @@ int main(int argc, char **argv) {
 	win_open(&win);
 	img_init(&img, &win);
 
-	if (options->thumbnails)
-		tns_load(&tns, &win, filenames, filecnt);
+	if (options->thumbnails) {
+		tns_loaded = 0;
+		tns_init(&tns, filecnt);
+	}
 
 	if (options->thumbnails == 2) {
 		mode = MODE_THUMBS;
-		tns.first = tns.sel = 0;
-		tns_render(&tns, &win);
 	} else {
 		mode = MODE_NORMAL;
 		load_image();
@@ -473,7 +475,12 @@ void run() {
 	timeout = 0;
 
 	while (1) {
-		if (timeout || (mode == MODE_THUMBS && !tns.loaded)) {
+		if (mode == MODE_THUMBS && tns_loaded < filecnt) {
+			tns_load(&tns, &win, filenames[tns_loaded++]);
+			tns_render(&tns, &win);
+			if (!XPending(win.env.dpy))
+				continue;
+		} else if (timeout) {
 			t.tv_sec = 0;
 			t.tv_usec = 250;
 			xfd = ConnectionNumber(win.env.dpy);
@@ -486,9 +493,6 @@ void run() {
 					img_render(&img, &win);
 				else
 					tns_render(&tns, &win);
-
-				if (mode == MODE_THUMBS && !tns.loaded && !XPending(win.env.dpy))
-					continue;
 			}
 		}
 

thumbs.c

@@ -18,7 +18,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <pthread.h>
 
 #include <Imlib2.h>
 
@@ -26,75 +25,14 @@
 #include "thumbs.h"
 #include "util.h"
 
-typedef struct tload_s {
-	const char **filenames;
-	tns_t *tns;
-	win_t *win;
-} tload_t;
-
 const int thumb_dim = THUMB_SIZE + 10;
 
-pthread_t loader;
-tload_t tinfo;
-
-void* thread_load(void *arg) {
-	int i, w, h;
-	float z, zw, zh;
-	tload_t *tl;
-	thumb_t *t;
-	Imlib_Image *im;
-
-	tl = (tload_t*) arg;
-
-	for (i = 0; i < tl->tns->cnt; ++i) {
-		if (!(im = imlib_load_image(tl->filenames[i])))
-			continue;
-
-		imlib_context_set_image(im);
-
-		w = imlib_image_get_width();
-		h = imlib_image_get_height();
-		zw = (float) THUMB_SIZE / (float) w;
-		zh = (float) THUMB_SIZE / (float) h;
-		z = MIN(zw, zh);
-
-		t = &tl->tns->thumbs[i];
-		t->w = z * w;
-		t->h = z * h;
-
-		t->pm = win_create_pixmap(tl->win, t->w, t->h);
-		imlib_context_set_drawable(t->pm);
-		imlib_render_image_part_on_drawable_at_size(0, 0, w, h,
-		                                            0, 0, t->w, t->h);
-		t->loaded = 1;
-		imlib_free_image();
-	}
-
-	tl->tns->loaded = 1;
-
-	return 0;
-}
-
-void tns_load(tns_t *tns, win_t *win, const char **fnames, int fcnt) {
-	pthread_attr_t tattr;
-
-	if (!tns || !win || !fnames || !fcnt)
+void tns_init(tns_t *tns, int cnt) {
+	if (!tns)
 		return;
-	
-	tns->thumbs = (thumb_t*) s_malloc(fcnt * sizeof(thumb_t));
-	memset(tns->thumbs, 0, fcnt * sizeof(thumb_t));
-	tns->cnt = fcnt;
-	tns->loaded = 0;
 
-	tinfo.filenames = fnames;
-	tinfo.tns = tns;
-	tinfo.win = win;
-
-	pthread_attr_init(&tattr);
-	pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_JOINABLE);
-
-	if (pthread_create(&loader, &tattr, thread_load, (void*) &tinfo))
-		die("could not create thread");
+	tns->cnt = tns->first = tns->sel = 0;
+	tns->thumbs = (thumb_t*) s_malloc(cnt * sizeof(thumb_t));
 }
 
 void tns_free(tns_t *tns, win_t *win) {
@@ -110,6 +48,37 @@ void tns_free(tns_t *tns, win_t *win) {
 	tns->thumbs = NULL;
 }
 
+void tns_load(tns_t *tns, win_t *win, const char *filename) {
+	int w, h;
+	float z, zw, zh;
+	thumb_t *t;
+	Imlib_Image *im;
+
+	if (!tns || !win || !filename)
+		return;
+
+	if (!(im = imlib_load_image(filename)))
+		return;
+
+	imlib_context_set_image(im);
+
+	w = imlib_image_get_width();
+	h = imlib_image_get_height();
+	zw = (float) THUMB_SIZE / (float) w;
+	zh = (float) THUMB_SIZE / (float) h;
+	z = MIN(zw, zh);
+
+	t = &tns->thumbs[tns->cnt++];
+	t->w = z * w;
+	t->h = z * h;
+
+	t->pm = win_create_pixmap(win, t->w, t->h);
+	imlib_context_set_drawable(t->pm);
+	imlib_render_image_part_on_drawable_at_size(0, 0, w, h,
+	                                            0, 0, t->w, t->h);
+	imlib_free_image();
+}
+
 void tns_render(tns_t *tns, win_t *win) {
 	int i, cnt, x, y;
 
@@ -130,9 +99,6 @@ void tns_render(tns_t *tns, win_t *win) {
 	i = tns->first;
 
 	while (i < cnt) {
-		if (!tns->thumbs[i].loaded)
-			continue;
-
 		tns->thumbs[i].x = x + (THUMB_SIZE - tns->thumbs[i].w) / 2;
 		tns->thumbs[i].y = y + (THUMB_SIZE - tns->thumbs[i].h) / 2;
 		win_draw_pixmap(win, tns->thumbs[i].pm, tns->thumbs[i].x,

thumbs.h

@@ -27,12 +27,10 @@ typedef struct thumb_s {
 	int w;
 	int h;
 	Pixmap pm;
-	unsigned char loaded;
 } thumb_t;
 
 typedef struct tns_s {
 	thumb_t *thumbs;
-	unsigned char loaded;
 	int cnt;
 	int cols;
 	int rows;
@@ -42,9 +40,11 @@ typedef struct tns_s {
 
 extern const int thumb_dim;
 
-void tns_load(tns_t*, win_t*, const char**, int);
+void tns_init(tns_t*, int);
 void tns_free(tns_t*, win_t*);
 
+void tns_load(tns_t*, win_t*, const char*);
+
 void tns_render(tns_t*, win_t*);
 
 #endif /* THUMBS_H */