ev-pixbuf-cache.h File Reference

#include <gtk/gtk.h>
#include <evince-document.h>
#include <evince-view.h>

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Data Structures
struct	_EvViewSelection

Macros
#define	EV_TYPE_PIXBUF_CACHE   (ev_pixbuf_cache_get_type ())
#define	EV_PIXBUF_CACHE(obj)   (G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_PIXBUF_CACHE, EvPixbufCache))
#define	EV_IS_PIXBUF_CACHE(obj)   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EV_TYPE_PIXBUF_CACHE))

Typedefs
typedef struct _EvViewSelection	EvViewSelection
typedef struct _EvPixbufCache	EvPixbufCache
typedef struct _EvPixbufCacheClass	EvPixbufCacheClass

Functions
GType	ev_pixbuf_cache_get_type (void) G_GNUC_CONST
EvPixbufCache *	ev_pixbuf_cache_new (GtkWidget *view, EvDocumentModel *model, gsize max_size)
void	ev_pixbuf_cache_set_max_size (EvPixbufCache *pixbuf_cache, gsize max_size)
void	ev_pixbuf_cache_set_page_range (EvPixbufCache *pixbuf_cache, gint start_page, gint end_page, GList *selection_list)
cairo_surface_t *	ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache, gint page)
void	ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
void	ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
void	ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache, cairo_region_t *region, gint page, gint rotation, gdouble scale)
void	ev_pixbuf_cache_set_inverted_colors (EvPixbufCache *pixbuf_cache, gboolean inverted_colors)
cairo_surface_t *	ev_pixbuf_cache_get_selection_surface (EvPixbufCache *pixbuf_cache, gint page, gfloat scale)
cairo_region_t *	ev_pixbuf_cache_get_selection_region (EvPixbufCache *pixbuf_cache, gint page, gfloat scale)
void	ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache, GList *selection_list)
GList *	ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)

Macro Definition Documentation

#define EV_IS_PIXBUF_CACHE

(

obj)

(G_TYPE_CHECK_INSTANCE_TYPE ((obj), EV_TYPE_PIXBUF_CACHE))

Definition at line 40 of file ev-pixbuf-cache.h.

#define EV_PIXBUF_CACHE

(

obj)

(G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_PIXBUF_CACHE, EvPixbufCache))

Definition at line 39 of file ev-pixbuf-cache.h.

#define EV_TYPE_PIXBUF_CACHE   (ev_pixbuf_cache_get_type ())

Definition at line 38 of file ev-pixbuf-cache.h.

Typedef Documentation

typedef struct _EvPixbufCache EvPixbufCache

Definition at line 56 of file ev-pixbuf-cache.h.

typedef struct _EvPixbufCacheClass EvPixbufCacheClass

Definition at line 57 of file ev-pixbuf-cache.h.

typedef struct _EvViewSelection EvViewSelection

Definition at line 47 of file ev-pixbuf-cache.h.

Function Documentation

void ev_pixbuf_cache_clear

(

EvPixbufCache *

pixbuf_cache)

Definition at line 981 of file ev-pixbuf-cache.c.

{
    int i;

    if (!pixbuf_cache->job_list)
        return;

    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
        dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
    }

    for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
        dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
    }
}

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GList* ev_pixbuf_cache_get_selection_list

(

EvPixbufCache *

pixbuf_cache)

Definition at line 1296 of file ev-pixbuf-cache.c.

{
    EvViewSelection *selection;
    GList *retval = NULL;
    int page;
    int i;

    g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);

        if (pixbuf_cache->start_page == -1 || pixbuf_cache->end_page == -1)
                return NULL;

    /* We check each area to see what needs updating, and what needs freeing; */
    page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        if (page < 0) {
            page ++;
            continue;
        }

        if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
            selection = g_slice_new0 (EvViewSelection);
            selection->page = page;
            selection->rect = pixbuf_cache->prev_job[i].selection_points;
            if (pixbuf_cache->prev_job[i].selection_region)
                selection->covered_region = cairo_region_reference (pixbuf_cache->prev_job[i].selection_region);
            retval = g_list_prepend (retval, selection);
        }
        
        page ++;
    }

    page = pixbuf_cache->start_page;
    for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
        if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
            selection = g_slice_new0 (EvViewSelection);
            selection->page = page;
            selection->rect = pixbuf_cache->job_list[i].selection_points;
            if (pixbuf_cache->job_list[i].selection_region)
                selection->covered_region = cairo_region_reference (pixbuf_cache->job_list[i].selection_region);
            retval = g_list_prepend (retval, selection);
        }
        
        page ++;
    }

    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        if (page >= ev_document_get_n_pages (pixbuf_cache->document))
            break;

        if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
            selection = g_slice_new0 (EvViewSelection);
            selection->page = page;
            selection->rect = pixbuf_cache->next_job[i].selection_points;
            if (pixbuf_cache->next_job[i].selection_region)
                selection->covered_region = cairo_region_reference (pixbuf_cache->next_job[i].selection_region);
            retval = g_list_prepend (retval, selection);
        }
        
        page ++;
    }

    return g_list_reverse (retval);
}

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cairo_region_t* ev_pixbuf_cache_get_selection_region	(	EvPixbufCache *	pixbuf_cache,
		gint	page,
		gfloat	scale
	)

Definition at line 1116 of file ev-pixbuf-cache.c.

{
    CacheJobInfo *job_info;

    /* the document does not implement the selection interface */
    if (!EV_IS_SELECTION (pixbuf_cache->document))
        return NULL;

    job_info = find_job_cache (pixbuf_cache, page);
    if (job_info == NULL)
        return NULL;

    /* No selection on this page */
    if (!job_info->points_set)
        return NULL;

    /* If we have a running job, we just return what we have under the
     * assumption that it'll be updated later and we can scale it as need
     * be */
    if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
        return job_info->selection_region && !cairo_region_is_empty(job_info->selection_region) ?
                        job_info->selection_region : NULL;

    /* Now, lets see if we need to resize the region.  If we do, we clear the
     * old one. */
    clear_selection_region_if_needed (pixbuf_cache, job_info, page, scale);

    /* Finally, we see if the two scales are the same, and get a new region
     * if needed.
     */
    if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_region_points))) {
        EvRenderContext *rc;
        EvPage *ev_page;
        gint width, height;

        ev_document_doc_mutex_lock ();
        ev_page = ev_document_get_page (pixbuf_cache->document, page);

        _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
                               page, scale, 0,
                               &width, &height);

        rc = ev_render_context_new (ev_page, 0, 0.);
        ev_render_context_set_target_size (rc, width, height);
        g_object_unref (ev_page);

        if (job_info->selection_region)
            cairo_region_destroy (job_info->selection_region);
        job_info->selection_region =
            ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
                               rc, job_info->selection_style,
                               &(job_info->target_points));
        job_info->selection_region_points = job_info->target_points;
        job_info->selection_region_scale = scale;
        g_object_unref (rc);
        ev_document_doc_mutex_unlock ();
    }
    return job_info->selection_region && !cairo_region_is_empty(job_info->selection_region) ?
                job_info->selection_region : NULL;
}

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cairo_surface_t* ev_pixbuf_cache_get_selection_surface	(	EvPixbufCache *	pixbuf_cache,
		gint	page,
		gfloat	scale
	)

Definition at line 1039 of file ev-pixbuf-cache.c.

{
    CacheJobInfo *job_info;

    /* the document does not implement the selection interface */
    if (!EV_IS_SELECTION (pixbuf_cache->document))
        return NULL;

    job_info = find_job_cache (pixbuf_cache, page);
    if (job_info == NULL)
        return NULL;

    /* No selection on this page */
    if (!job_info->points_set)
        return NULL;

    /* If we have a running job, we just return what we have under the
     * assumption that it'll be updated later and we can scale it as need
     * be */
    if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
        return job_info->selection;

    /* Now, lets see if we need to resize the image.  If we do, we clear the
     * old one. */
    clear_selection_surface_if_needed (pixbuf_cache, job_info, page, scale);

    /* Finally, we see if the two scales are the same, and get a new pixbuf
     * if needed.  We do this synchronously for now.  At some point, we
     * _should_ be able to get rid of the doc_mutex, so the synchronicity
     * doesn't kill us.  Rendering a few glyphs should really be fast.
     */
    if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
        EvRectangle *old_points;
        GdkColor text, base;
        EvRenderContext *rc;
        EvPage *ev_page;
        gint width, height;

        /* we need to get a new selection pixbuf */
        ev_document_doc_mutex_lock ();
        if (job_info->selection_points.x1 < 0) {
            g_assert (job_info->selection == NULL);
            old_points = NULL;
        } else {
            old_points = &(job_info->selection_points);
        }

        ev_page = ev_document_get_page (pixbuf_cache->document, page);
                _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
                                                       page,
                               scale * job_info->device_scale,
                               0, &width, &height);

        rc = ev_render_context_new (ev_page, 0, scale * job_info->device_scale);
                ev_render_context_set_target_size (rc, width, height);
        g_object_unref (ev_page);

        get_selection_colors (EV_VIEW (pixbuf_cache->view), &text, &base);
        ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
                           rc, &(job_info->selection),
                           &(job_info->target_points),
                           old_points,
                           job_info->selection_style,
                           &text, &base);
                if (job_info->selection)
                        set_device_scale_on_surface (job_info->selection, job_info->device_scale);
        job_info->selection_points = job_info->target_points;
        job_info->selection_scale = scale * job_info->device_scale;
        g_object_unref (rc);
        ev_document_doc_mutex_unlock ();
    }
    return job_info->selection;
}

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cairo_surface_t* ev_pixbuf_cache_get_surface	(	EvPixbufCache *	pixbuf_cache,
		gint	page
	)

Definition at line 906 of file ev-pixbuf-cache.c.

{
    CacheJobInfo *job_info;

    job_info = find_job_cache (pixbuf_cache, page);
    if (job_info == NULL)
        return NULL;

    if (job_info->page_ready)
        return job_info->surface;

    /* We don't need to wait for the idle to handle the callback */
    if (job_info->job &&
        EV_JOB_RENDER (job_info->job)->page_ready) {
        copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
        g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
    }

    return job_info->surface;
}

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GType ev_pixbuf_cache_get_type

(

void

)

EvPixbufCache* ev_pixbuf_cache_new	(	GtkWidget *	view,
		EvDocumentModel *	model,
		gsize	max_size
	)

Definition at line 230 of file ev-pixbuf-cache.c.

{
    EvPixbufCache *pixbuf_cache;

    pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
    /* This is a backlink, so we don't ref this */ 
    pixbuf_cache->view = view;
    pixbuf_cache->model = g_object_ref (model);
    pixbuf_cache->document = ev_document_model_get_document (model);
    pixbuf_cache->max_size = max_size;

    return pixbuf_cache;
}

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void ev_pixbuf_cache_reload_page	(	EvPixbufCache *	pixbuf_cache,
		cairo_region_t *	region,
		gint	page,
		gint	rotation,
		gdouble	scale
	)

Definition at line 1362 of file ev-pixbuf-cache.c.

{
    CacheJobInfo *job_info;
        gint width, height;

    job_info = find_job_cache (pixbuf_cache, page);
    if (job_info == NULL)
        return;

    _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
                           page, scale, rotation,
                           &width, &height);
        add_job (pixbuf_cache, job_info, region,
         width, height, page, rotation, scale,
         EV_JOB_PRIORITY_URGENT);
}

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void ev_pixbuf_cache_set_inverted_colors	(	EvPixbufCache *	pixbuf_cache,
		gboolean	inverted_colors
	)

Definition at line 874 of file ev-pixbuf-cache.c.

{
    gint i;

    if (pixbuf_cache->inverted_colors == inverted_colors)
        return;

    pixbuf_cache->inverted_colors = inverted_colors;

    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        CacheJobInfo *job_info;

        job_info = pixbuf_cache->prev_job + i;
        if (job_info && job_info->surface)
            ev_document_misc_invert_surface (job_info->surface);

        job_info = pixbuf_cache->next_job + i;
        if (job_info && job_info->surface)
            ev_document_misc_invert_surface (job_info->surface);
    }

    for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
        CacheJobInfo *job_info;

        job_info = pixbuf_cache->job_list + i;
        if (job_info && job_info->surface)
            ev_document_misc_invert_surface (job_info->surface);
    }
}

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void ev_pixbuf_cache_set_max_size	(	EvPixbufCache *	pixbuf_cache,
		gsize	max_size
	)

Definition at line 247 of file ev-pixbuf-cache.c.

{
    if (pixbuf_cache->max_size == max_size)
        return;

    if (pixbuf_cache->max_size > max_size)
        ev_pixbuf_cache_clear (pixbuf_cache);
    pixbuf_cache->max_size = max_size;
}

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void ev_pixbuf_cache_set_page_range	(	EvPixbufCache *	pixbuf_cache,
		gint	start_page,
		gint	end_page,
		GList *	selection_list
	)

Definition at line 841 of file ev-pixbuf-cache.c.

{
    gdouble scale = ev_document_model_get_scale (pixbuf_cache->model);
    gint    rotation = ev_document_model_get_rotation (pixbuf_cache->model);

    g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));

    g_return_if_fail (start_page >= 0 && start_page < ev_document_get_n_pages (pixbuf_cache->document));
    g_return_if_fail (end_page >= 0 && end_page < ev_document_get_n_pages (pixbuf_cache->document));
    g_return_if_fail (end_page >= start_page);

        pixbuf_cache->scroll_direction = ev_pixbuf_cache_get_scroll_direction (pixbuf_cache, start_page, end_page);

    /* First, resize the page_range as needed.  We cull old pages
     * mercilessly. */
    ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page, rotation, scale);

    /* Then, we update the current jobs to see if any of them are the wrong
     * size, we remove them if we need to. */
    ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);

    /* Next, we update the target selection for our pages */
    ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);

    /* Finally, we add the new jobs for all the sizes that don't have a
     * pixbuf */
    ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
}

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void ev_pixbuf_cache_set_selection_list	(	EvPixbufCache *	pixbuf_cache,
		GList *	selection_list
	)

Definition at line 1210 of file ev-pixbuf-cache.c.

{
    EvViewSelection *selection;
    GList *list = selection_list;
    int page;
    int i;

    g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));

    if (!EV_IS_SELECTION (pixbuf_cache->document))
        return;

        if (pixbuf_cache->start_page == -1 || pixbuf_cache->end_page == -1)
                return;

    /* We check each area to see what needs updating, and what needs freeing; */
    page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        if (page < 0) {
            page ++;
            continue;
        }

        selection = NULL;
        while (list) {
            if (((EvViewSelection *)list->data)->page == page) {
                selection = list->data;
                break;
            } else if (((EvViewSelection *)list->data)->page > page) 
                break;
            list = list->next;
        }

        if (selection)
            update_job_selection (pixbuf_cache->prev_job + i, selection);
        else
            clear_job_selection (pixbuf_cache->prev_job + i);
        page ++;
    }

    page = pixbuf_cache->start_page;
    for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
        selection = NULL;
        while (list) {
            if (((EvViewSelection *)list->data)->page == page) {
                selection = list->data;
                break;
            } else if (((EvViewSelection *)list->data)->page > page) 
                break;
            list = list->next;
        }

        if (selection)
            update_job_selection (pixbuf_cache->job_list + i, selection);
        else
            clear_job_selection (pixbuf_cache->job_list + i);
        page ++;
    }

    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        if (page >= ev_document_get_n_pages (pixbuf_cache->document))
            break;

        selection = NULL;
        while (list) {
            if (((EvViewSelection *)list->data)->page == page) {
                selection = list->data;
                break;
            } else if (((EvViewSelection *)list->data)->page > page) 
                break;
            list = list->next;
        }

        if (selection)
            update_job_selection (pixbuf_cache->next_job + i, selection);
        else
            clear_job_selection (pixbuf_cache->next_job + i);
        page ++;
    }
}

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void ev_pixbuf_cache_style_changed

(

EvPixbufCache *

pixbuf_cache)

Definition at line 1000 of file ev-pixbuf-cache.c.

{
    gint i;

    if (!pixbuf_cache->job_list)
        return;

    /* FIXME: doesn't update running jobs. */
    for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
        CacheJobInfo *job_info;

        job_info = pixbuf_cache->prev_job + i;
        if (job_info->selection) {
            cairo_surface_destroy (job_info->selection);
            job_info->selection = NULL;
            job_info->selection_points.x1 = -1;
        }

        job_info = pixbuf_cache->next_job + i;
        if (job_info->selection) {
            cairo_surface_destroy (job_info->selection);
            job_info->selection = NULL;
            job_info->selection_points.x1 = -1;
        }
    }

    for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
        CacheJobInfo *job_info;

        job_info = pixbuf_cache->job_list + i;
        if (job_info->selection) {
            cairo_surface_destroy (job_info->selection);
            job_info->selection = NULL;
            job_info->selection_points.x1 = -1;
        }
    }
}

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