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Make thumbnail maximum size configurable

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Lingzhu Xiang 2014-10-28 18:11:52 -04:00
parent 25e88a114a
commit f9b4a12208
4 changed files with 30 additions and 12 deletions
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2
config.c
View file

@ -162,6 +162,8 @@ config_load_default(zathura_t* zathura)
girara_setting_add(gsession, "zoom-max", &int_value, INT, false, _("Zoom maximum"), NULL, NULL);
int_value = ZATHURA_PAGE_CACHE_DEFAULT_SIZE;
girara_setting_add(gsession, "page-cache-size", &int_value, INT, true, _("Maximum number of pages to keep in the cache"), NULL, NULL);
int_value = ZATHURA_PAGE_THUMBNAIL_DEFAULT_SIZE;
girara_setting_add(gsession, "page-thumbnail-size", &int_value, INT, true, _("Maximum size in pixels of thumbnails to keep in the cache"), NULL, NULL);
int_value = 2000;
girara_setting_add(gsession, "jumplist-size", &int_value, INT, false, _("Number of positions to remember in the jumplist"), cb_jumplist_change, NULL);

12
doc/man/zathurarc.5.rst
View file

@ -699,6 +699,18 @@ consuming a significant portion of the system memory.
* Value type: Integer
* Default value: 15
page-thumbnail-size
^^^^^^^^^^^^^^^^^^^
Defines the maximum size in pixels of the thumbnail that could be kept in the
thumbnail cache per page. The thumbnail is scaled for a quick preview during
zooming before the page is rendered. When the page is rendered, the result is
saved as the thumbnail only if the size is no more than this value. A larger
value increases quality but introduces longer delay in zooming and uses more
system memory.
* Value type: Integer
* Default value: 4194304 (4M)
pages-per-row
^^^^^^^^^^^^^
Defines the number of pages that are rendered next to each other in a row.

25
page-widget.c
View file

@ -79,8 +79,8 @@ static void cb_menu_image_save(GtkMenuItem* item, ZathuraPage* page);
static void cb_update_surface(ZathuraRenderRequest* request, cairo_surface_t* surface, void* data);
static void cb_cache_added(ZathuraRenderRequest* request, void* data);
static void cb_cache_invalidated(ZathuraRenderRequest* request, void* data);
static bool surface_small_enough(cairo_surface_t* surface, cairo_surface_t* old);
static cairo_surface_t *draw_thumbnail_image(cairo_surface_t* surface);
static bool surface_small_enough(cairo_surface_t* surface, size_t max_size, cairo_surface_t* old);
static cairo_surface_t *draw_thumbnail_image(cairo_surface_t* surface, size_t max_size);
enum properties_e {
PROP_0,
@ -582,15 +582,13 @@ zathura_page_widget_redraw_canvas(ZathuraPage* pageview)
gtk_widget_queue_draw(widget);
}
/* high enough but not causing noticable delay in scaling */
#define THUMBNAIL_MAX_SIZE (4*1024*1024)
/* smaller than max to be replaced by actual renders */
#define THUMBNAIL_INITIAL_SIZE (THUMBNAIL_MAX_SIZE/4)
#define THUMBNAIL_INITIAL_SCALE 0.5
/* small enough to make bilinear downscaling fast */
#define THUMBNAIL_MAX_SCALE 0.5
static bool
surface_small_enough(cairo_surface_t* surface, cairo_surface_t* old)
surface_small_enough(cairo_surface_t* surface, size_t max_size, cairo_surface_t* old)
{
if (cairo_surface_get_type(surface) != CAIRO_SURFACE_TYPE_IMAGE)
return true;
@ -598,7 +596,7 @@ surface_small_enough(cairo_surface_t* surface, cairo_surface_t* old)
const unsigned int width = cairo_image_surface_get_width(surface);
const unsigned int height = cairo_image_surface_get_height(surface);
const size_t new_size = width * height;
if (new_size > THUMBNAIL_MAX_SIZE) {
if (new_size > max_size) {
return false;
}
@ -615,11 +613,11 @@ surface_small_enough(cairo_surface_t* surface, cairo_surface_t* old)
}
static cairo_surface_t *
draw_thumbnail_image(cairo_surface_t* surface)
draw_thumbnail_image(cairo_surface_t* surface, size_t max_size)
{
unsigned int width = cairo_image_surface_get_width(surface);
unsigned int height = cairo_image_surface_get_height(surface);
double scale = sqrt((double)THUMBNAIL_INITIAL_SIZE / (width * height));
double scale = sqrt((double)max_size / (width * height)) * THUMBNAIL_INITIAL_SCALE;
if (scale > THUMBNAIL_MAX_SCALE) {
scale = THUMBNAIL_MAX_SCALE;
}
@ -651,6 +649,11 @@ void
zathura_page_widget_update_surface(ZathuraPage* widget, cairo_surface_t* surface, bool keep_thumbnail)
{
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
int thumbnail_size = 0;
girara_setting_get(priv->zathura->ui.session, "page-thumbnail-size", &thumbnail_size);
if (thumbnail_size <= 0) {
thumbnail_size = ZATHURA_PAGE_THUMBNAIL_DEFAULT_SIZE;
}
bool new_render = (priv->surface == NULL && priv->thumbnail == NULL);
if (priv->surface != NULL) {
@ -661,14 +664,14 @@ zathura_page_widget_update_surface(ZathuraPage* widget, cairo_surface_t* surface
priv->surface = surface;
cairo_surface_reference(surface);
if (surface_small_enough(surface, priv->thumbnail)) {
if (surface_small_enough(surface, thumbnail_size, priv->thumbnail)) {
if (priv->thumbnail != NULL) {
cairo_surface_destroy(priv->thumbnail);
}
priv->thumbnail = surface;
cairo_surface_reference(surface);
} else if (new_render) {
priv->thumbnail = draw_thumbnail_image(surface);
priv->thumbnail = draw_thumbnail_image(surface, thumbnail_size);
}
} else if (!keep_thumbnail && priv->thumbnail != NULL) {
cairo_surface_destroy(priv->thumbnail);

3
zathura.h
View file

@ -73,7 +73,8 @@ enum {
/* cache constants */
enum {
ZATHURA_PAGE_CACHE_DEFAULT_SIZE = 15,
ZATHURA_PAGE_CACHE_MAX_SIZE = 1024
ZATHURA_PAGE_CACHE_MAX_SIZE = 1024,
ZATHURA_PAGE_THUMBNAIL_DEFAULT_SIZE = 4*1024*1024
};
/* forward declaration for types from database.h */