static gboolean idleFillCaches(gpointer dummy)
{
/* Unused parameters. */
(void)dummy;
/* do prerendering of next slides. this will only happen when
* there's nothing else to do. */
struct viewport *pp = NULL;
GList *it = ports;
int mypage_i = -1;
while (it)
{
pp = (struct viewport *)(it->data);
mypage_i = pagenumForPort(pp);
/* Trigger some prerendering. The pointers are irrelevant for
* now -- we just want the cache to be filled with all
* previous and next slides. getRenderedPixbuf() will simply
* return NULL for invalid page numbers. */
getRenderedPixbuf(pp, mypage_i + 1);
getRenderedPixbuf(pp, mypage_i - 1);
it = g_list_next(it);
}
/* save state. */
preQueued = FALSE;
/* do not call me again. */
return FALSE;
}
static void updatePortPixbuf(struct viewport *pp)
{
int mypage_i;
/* no valid target size? */
if (pp->width <= 0 || pp->height <= 0)
return;
/* decide which page to render - if any */
mypage_i = pagenumForPort(pp);
if (mypage_i < 0 || mypage_i >= doc_n_pages)
{
/* This port does not show anything right now, so clear its
* content and quit. */
gtk_image_clear(GTK_IMAGE(pp->image));
return;
}
/* if note-control is active, print current page number if on
* "main" frame. (don't do this on the beamer because it could be
* locked.)
* this allows you to attach any kind of other program or script
* which can show notes for a specific slide. simply pipe the
* output of pdfpres to your other tool.
*/
if (pp->offset == 0 && !pp->isBeamer)
{
printNote(doc_page + 1);
if (runpref.do_notectrl)
{
printf("%d\n", doc_page + 1);
fflush(stdout);
}
}
/* get a pixbuf for this viewport. caching is behind
* getRenderedPixbuf(). */
pp->pixbuf = getRenderedPixbuf(pp, mypage_i);
/* display the current page. */
if (pp->pixbuf != NULL)
gtk_image_set_from_pixbuf(GTK_IMAGE(pp->image), pp->pixbuf);
else
fprintf(stderr, "[Cache] Returned empty pixbuf."
" You're doing something wrong.\n");
}
static void refreshFrames(void)
{
struct viewport *pp = NULL;
GList *it = ports;
int mypage_i;
gchar *title = NULL;
while (it)
{
pp = (struct viewport *)(it->data);
/* the beamer has no frame */
if (pp->isBeamer == FALSE)
{
/* reset background color */
gtk_widget_modify_bg(pp->frame->parent, GTK_STATE_NORMAL,
NULL);
/* lock mode: highlight the saved/current page */
if (beamer_active == FALSE)
{
if (doc_page + pp->offset == doc_page_mark)
{
gtk_widget_modify_bg(pp->frame->parent,
GTK_STATE_NORMAL, &col_marked);
}
else if (pp->offset == 0)
{
gtk_widget_modify_bg(pp->frame->parent,
GTK_STATE_NORMAL, &col_dim);
}
}
/* normal mode: highlight the "current" frame */
else
{
if (pp->offset == 0)
{
gtk_widget_modify_bg(pp->frame->parent,
GTK_STATE_NORMAL, &col_current);
}
}
/* Refresh labels. */
if (pp->frame != NULL)
{
mypage_i = pagenumForPort(pp);
if (mypage_i < 0 || mypage_i >= doc_n_pages)
{
gtk_frame_set_label(GTK_FRAME(pp->frame), "X");
}
else
{
title = g_strdup_printf("Slide %d / %d", mypage_i + 1,
doc_n_pages);
gtk_frame_set_label(GTK_FRAME(pp->frame), title);
g_free(title);
}
}
}
it = g_list_next(it);
}
}
static gboolean onCanvasDraw(GtkWidget *widget, cairo_t *cr,
struct viewport *pp)
{
(void)widget;
int mypage_i, myfitmode = -1;
gdouble w = 0, h = 0;
gchar *title = NULL;
gdouble popwidth, popheight;
gdouble tx, ty;
gdouble screen_ratio, page_ratio, scale;
PopplerPage *page = NULL;
/* no valid target size? */
if (pp->width <= 0 || pp->height <= 0)
return TRUE;
/* decide which page to render - if any */
mypage_i = pagenumForPort(pp);
if (mypage_i < 0 || mypage_i >= doc_n_pages)
{
/* We don't do any drawing and set the frame's title to "X".
* Thus, we'll end up with an "empty" frame. */
if (pp->frame != NULL)
gtk_frame_set_label(GTK_FRAME(pp->frame), "X");
return TRUE;
}
else
{
/* update frame title */
if (pp->frame != NULL)
{
title = g_strdup_printf("Slide %d / %d", mypage_i + 1,
doc_n_pages);
gtk_frame_set_label(GTK_FRAME(pp->frame), title);
g_free(title);
}
}
/* if note-control is active, print current page number if on
* "main" frame. (don't do this on the beamer because it could be
* locked.)
* this allows you to attach any kind of other program or script
* which can show notes for a specific slide. simply pipe the
* output of pdfpres to your other tool.
*/
if (pp->offset == 0 && !pp->isBeamer)
{
printNote(doc_page + 1);
if (runpref.do_notectrl)
{
printf("%d\n", doc_page + 1);
fflush(stdout);
}
}
/* Get the page and it's size from the document. */
page = poppler_document_get_page(doc, mypage_i);
poppler_page_get_size(page, &popwidth, &popheight);
/* Set page number */
if (pp->isBeamer)
{
gtk_label_set_text(GTK_LABEL(curPageLabel),
g_strdup_printf("%s/%d", poppler_page_get_label(page), doc_last_page));
}
/* Select fit mode. */
page_ratio = popwidth / popheight;
screen_ratio = (double)pp->width / (double)pp->height;
if (runpref.fit_mode == FIT_PAGE)
{
/* That's it: Compare screen and page ratio. This
* will cover all 4 cases that could happen. */
if (screen_ratio > page_ratio)
myfitmode = FIT_HEIGHT;
else
myfitmode = FIT_WIDTH;
}
else
myfitmode = runpref.fit_mode;
switch (myfitmode)
{
case FIT_HEIGHT:
/* Fit size. */
h = pp->height;
w = h * page_ratio;
scale = h / popheight;
/* Center page. */
tx = (pp->width - popwidth * scale) * 0.5;
ty = 0;
break;
case FIT_WIDTH:
w = pp->width;
h = w / page_ratio;
scale = w / popwidth;
tx = 0;
ty = (pp->height - popheight * scale) * 0.5;
break;
}
/* A black background on beamer frame. Push and pop cairo contexts, so we have a
* clean state afterwards. */
if (pp->isBeamer) {
cairo_save(cr);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_rectangle(cr, 0, 0, pp->width, pp->height);
cairo_fill(cr);
cairo_restore(cr);
/* center page on beamer */
cairo_translate(cr, tx, ty);
} else {
cairo_translate(cr, tx, 0);
}
/* Render the page */
cairo_scale(cr, scale, scale);
poppler_page_render(page, cr);
/* We no longer need that page. */
g_object_unref(G_OBJECT(page));
/* Nobody else draws to this widget. */
return TRUE;
}
