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-rw-r--r--src/main.c72
-rw-r--r--src/meh.h1
2 files changed, 50 insertions, 23 deletions
diff --git a/src/main.c b/src/main.c
index 7a74b87..c609a07 100644
--- a/src/main.c
+++ b/src/main.c
@@ -58,6 +58,9 @@ static char **images;
int width = 0, height = 0;
struct image *curimg = NULL;
+struct image *nextimg = NULL;
+struct image *previmg = NULL;
+
static void freeimage(struct image *img){
if(img){
backend_free(img);
@@ -67,33 +70,47 @@ static void freeimage(struct image *img){
}
}
-static void nextimage(){
- if(++imageidx == imageslen)
- imageidx = 0;
- freeimage(curimg);
- curimg = NULL;
+static int incidx(int i){
+ return ++i >= imageslen ? 0 : i;
}
-static void previmage(){
- if(--imageidx < 0)
- imageidx = imageslen - 1;
- freeimage(curimg);
- curimg = NULL;
+static int decidx(int i){
+ return --i < 0 ? imageslen - 1 : i;
}
-static void (*direction)() = nextimage;
+static int (*direction)(int) = incidx;
void key_reload(){
freeimage(curimg);
curimg = NULL;
}
void key_next(){
- if(mode != MODE_CTL)
- (direction = nextimage)();
+ if(mode != MODE_CTL){
+ curimg->state &= LOADED | SLOWLOADED;
+ freeimage(previmg);
+ previmg = curimg;
+ curimg = nextimg;
+ nextimg = NULL;
+ if(curimg){
+ imageidx = curimg->idx;
+ }else{
+ imageidx = (direction = incidx)(imageidx);
+ }
+ }
}
void key_prev(){
- if(mode != MODE_CTL)
- (direction = previmage)();
+ if(mode != MODE_CTL){
+ curimg->state &= LOADED | SLOWLOADED;
+ freeimage(nextimg);
+ nextimg = curimg;
+ curimg = previmg;
+ previmg = NULL;
+ if(curimg){
+ imageidx = curimg->idx;
+ }else{
+ imageidx = (direction = decidx)(imageidx);
+ }
+ }
}
void key_quit(){
exit(EXIT_SUCCESS);
@@ -119,7 +136,7 @@ struct image *imageopen2(char *filename){
return NULL;
}
-static int doredraw(struct image **i){
+static int doredraw(struct image **i, int idx, int (*dir)(int), int dstates){
if(!*i){
if(mode == MODE_CTL){
if(images[0] == NULL)
@@ -129,19 +146,20 @@ static int doredraw(struct image **i){
return 0;
}
}else{
- int firstimg = imageidx;
+ int firstimg = idx;
while(!*i){
- if((*i = imageopen2(images[imageidx]))){
+ if((*i = imageopen2(images[idx]))){
break;
}
- direction();
- if(imageidx == firstimg){
+ idx = dir(idx);
+ if(idx == firstimg){
fprintf(stderr, "No valid images to view\n");
exit(EXIT_FAILURE);
}
}
}
+ (*i)->idx = idx;
(*i)->buf = NULL;
(*i)->state = NONE;
return 1;
@@ -174,7 +192,7 @@ static int doredraw(struct image **i){
assert((*i)->state & LOADED);
return 1;
}else if(width && height){
- if((state & LOADED) && !(state & SCALED)){
+ if((dstates & SCALED) && (state & LOADED) && !(state & SCALED)){
backend_prepare(*i, width, height, !!(state & SCALED));
(*i)->state &= LOADED | SLOWLOADED | SCALED | SLOWSCALED;
@@ -185,7 +203,7 @@ static int doredraw(struct image **i){
assert(!((*i)->state & DRAWN));
}
}
- if(((*i)->state & SCALED) && !(state & DRAWN)){
+ if((dstates & DRAWN) && ((*i)->state & SCALED) && !(state & DRAWN)){
backend_draw(*i, width, height);
(*i)->state |= DRAWN;
return 1;
@@ -251,7 +269,15 @@ int process_idle(){
if(mode == MODE_CTL && images[0] == NULL){
return 0;
}else{
- return doredraw(&curimg);
+ int ret = doredraw(&curimg, imageidx, direction, ~0);
+ imageidx = curimg->idx;
+ if(!ret){
+ ret = doredraw(&nextimg, incidx(imageidx), incidx, LOADED | SLOWLOADED);
+ }
+ if(!ret){
+ ret = doredraw(&previmg, decidx(imageidx), decidx, LOADED | SLOWLOADED);
+ }
+ return ret;
}
}
diff --git a/src/meh.h b/src/meh.h
index ca737f8..afb9450 100644
--- a/src/meh.h
+++ b/src/meh.h
@@ -26,6 +26,7 @@ struct image{
unsigned int bufwidth, bufheight;
struct imageformat *fmt;
imgstate state;
+ int idx;
void *backend;
};