Attachment 105495 Details for Bug 83305 – poppler-page: get_quadrilaterals_for_area implementation

[patch] poppler-page: get_quadrilaterals_for_area implementation

0001-poppler-page-get-quadrilaterals-for-area.patch (text/plain), 3.97 KB, created by giselle on 2014-08-31 18:02:18 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: giselle

Created: 2014-08-31 18:02:18 UTC

Size: 3.97 KB

patch

obsolete

>From 22d7160b39451c8f48ed2588df2445321fe91856 Mon Sep 17 00:00:00 2001
>From: Giselle Reis <gisellemnr@src.gnome.org>
>Date: Thu, 7 Aug 2014 17:16:09 +0200
>Subject: [PATCH 1/2] poppler-page: get quadrilaterals for area
>
>---
> glib/poppler-page.cc | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> glib/poppler-page.h  |  3 ++
> 2 files changed, 85 insertions(+)
>
>diff --git a/glib/poppler-page.cc b/glib/poppler-page.cc
>index 6e2e7f8..bbad7aa 100644
>--- a/glib/poppler-page.cc
>+++ b/glib/poppler-page.cc
>@@ -2419,3 +2419,85 @@ poppler_page_get_text_attributes_for_area (PopplerPage      *page,
> 
>   return g_list_reverse(attributes);
> }
>+
>+/**
>+ * poppler_page_get_quadrilaterals_for_area:
>+ * @page: A #PopplerPage
>+ * @area: a #PopplerRectangle
>+ * @bbox: a #PopplerRectangle
>+ *
>+ * Obtains the quadrilaterals of the text in @area as a #GArray of #PopplerQuadrilateral.
>+ * If @area does not encompasses the full width of the text, the quadrilaterals
>+ * will nevertheless contain the text in the full width.
>+ * Sets @bbox to the rectangle which is the bounding box of all quadrilaterals,
>+ * if not NULL.
>+ *
>+ * Return value: (element-type PopplerQuadrilateral) (transfer full): A #GArray of #PopplerQuadrilateral
>+ *
>+ * Since: 0.28
>+ **/
>+GArray *
>+poppler_page_get_quadrilaterals_for_area (PopplerPage      *page,
>+					  PopplerRectangle *area,
>+					  PopplerRectangle *bbox)
>+{
>+  GList  *l_rects;
>+  GList  *list;
>+  guint   n_rects;
>+  guint   i;
>+  GArray *quads_array;
>+  gdouble height;
>+  gdouble max_x;
>+  gdouble max_y;
>+  gdouble min_x;
>+  gdouble min_y;
>+
>+  if (bbox) {
>+    bbox->x1 = G_MAXDOUBLE;
>+    bbox->y1 = G_MAXDOUBLE;
>+    bbox->x2 = G_MINDOUBLE;
>+    bbox->y2 = G_MINDOUBLE;
>+  }
>+
>+  poppler_page_get_size (page, NULL, &height);
>+
>+  l_rects = poppler_page_get_selection_region (page, 1.0, POPPLER_SELECTION_GLYPH, area);
>+  n_rects = g_list_length (l_rects);
>+
>+  quads_array = g_array_sized_new (TRUE, TRUE,
>+                                   sizeof (PopplerQuadrilateral),
>+                                   n_rects);
>+  g_array_set_size (quads_array, n_rects);
>+
>+  for (list = l_rects, i = 0; i < n_rects; i++, list = list->next) {
>+    PopplerRectangle     *r;
>+    PopplerQuadrilateral *quad;
>+
>+    quad = &g_array_index (quads_array, PopplerQuadrilateral, i);
>+    r = (PopplerRectangle *) list->data;
>+    quad->p1.x = r->x1;
>+    quad->p1.y = height - r->y2;
>+    quad->p2.x = r->x2;
>+    quad->p2.y = height - r->y2;
>+    quad->p3.x = r->x1;
>+    quad->p3.y = height - r->y1;
>+    quad->p4.x = r->x2;
>+    quad->p4.y = height - r->y1;
>+    g_slice_free (PopplerRectangle, r);
>+
>+    if (bbox) {
>+      max_x = MAX (quad->p1.x, MAX (quad->p2.x, MAX (quad->p3.x, quad->p4.x)));
>+      max_y = MAX (quad->p1.y, MAX (quad->p2.y, MAX (quad->p3.y, quad->p4.y)));
>+      min_x = MIN (quad->p1.x, MIN (quad->p2.x, MIN (quad->p3.x, quad->p4.x)));
>+      min_y = MIN (quad->p1.y, MIN (quad->p2.y, MIN (quad->p3.y, quad->p4.y)));
>+
>+      if (min_x < bbox->x1) bbox->x1 = min_x;
>+      if (min_y < bbox->y1) bbox->y1 = min_y;
>+      if (max_x > bbox->x2) bbox->x2 = max_x;
>+      if (max_y > bbox->y2) bbox->y2 = max_y;
>+    }
>+  }
>+  g_list_free (l_rects);
>+
>+  return quads_array;
>+}
>diff --git a/glib/poppler-page.h b/glib/poppler-page.h
>index 63fe362..4be6020 100644
>--- a/glib/poppler-page.h
>+++ b/glib/poppler-page.h
>@@ -109,6 +109,9 @@ GList                 *poppler_page_get_text_attributes  (PopplerPage        *pa
> void                   poppler_page_free_text_attributes (GList              *list);
> GList *        poppler_page_get_text_attributes_for_area (PopplerPage        *page,
>                                                           PopplerRectangle   *area);
>+GArray         *poppler_page_get_quadrilaterals_for_area (PopplerPage        *page,
>+		                                          PopplerRectangle   *area,
>+							  PopplerRectangle   *bbox);
> 
> /* A rectangle on a page, with coordinates in PDF points. */
> #define POPPLER_TYPE_RECTANGLE             (poppler_rectangle_get_type ())
>-- 
>1.9.3
>

Actions: View | Splinter Review

Attachments on bug 83305: 105495 | 105496

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.