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#include <pango/pango.h>
#include <pango/pangocairo.h>
int
main (int argc, char *argv[])
{
const char *filename;
PangoContext *context;
PangoLineBreaker *breaker;
int margin;
int x, y, width, height;
int x0, y0;
int col;
PangoLines *lines;
cairo_surface_t *surface;
cairo_t *cr;
char *text;
gsize length;
PangoAttrList *attrs;
GError *error = NULL;
if (argc != 3)
{
g_printerr ("Usage: %s INPUT_FILENAME OUTPUT_FILENAME\n", argv[0]);
return 1;
}
if (!g_file_get_contents (argv[1], &text, &length, &error))
{
g_printerr ("%s\n", error->message);
return 1;
}
filename = argv[2];
context = pango_font_map_create_context (pango_cairo_font_map_get_default ());
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 600, 600);
cr = cairo_create (surface);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
breaker = pango_line_breaker_new (context);
g_print ("Using %s\n", G_OBJECT_TYPE_NAME (breaker));
attrs = pango_attr_list_new ();
pango_line_breaker_add_text (breaker, text, -1, attrs);
pango_attr_list_unref (attrs);
lines = pango_lines_new ();
/* We do 2 columns, followed by 3 columns, to demonstrate changing
* line width.
*/
margin = 20;
x = x0 = margin * PANGO_SCALE;
y = y0 = margin * PANGO_SCALE;
width = (300 - 2 * margin) * PANGO_SCALE;
height = (300 - margin) * PANGO_SCALE;
col = 0;
while (!pango_line_breaker_done (breaker))
{
PangoLayoutLine *line;
PangoRectangle ext;
retry:
line = pango_line_breaker_next_line (breaker,
x, width,
PANGO_WRAP_CHAR,
PANGO_ELLIPSIZE_NONE);
if (!pango_layout_line_ends_paragraph (line))
line = pango_layout_line_justify (line, width);
pango_layout_line_get_trimmed_extents (line, PANGO_LEADING_TRIM_NONE, &ext);
if (y + ext.height > height)
{
gboolean width_changed = FALSE;
if (col == 0)
x0 += 300 * PANGO_SCALE;
else if (col == 1)
{
x0 = margin * PANGO_SCALE;
y0 = (300 + margin) * PANGO_SCALE;
width = (200 - 2 * margin) * PANGO_SCALE;
height = (600 - 2 * margin) * PANGO_SCALE;
width_changed = TRUE;
}
else
x0 += 200 * PANGO_SCALE;
x = x0;
y = y0;
col++;
if (width_changed &&
pango_line_breaker_undo_line (breaker, line))
{
g_object_unref (line);
goto retry;
}
}
pango_lines_add_line (lines, line, x, y - ext.y);
y += ext.height;
}
pango_cairo_show_lines (cr, lines);
cairo_surface_write_to_png (surface, filename);
g_print ("Output written to %s\n", filename);
g_object_unref (lines);
g_object_unref (breaker);
cairo_surface_destroy (surface);
cairo_destroy (cr);
g_object_unref (context);
g_free (text);
return 0;
}
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