blob: 07d9e2e9dd595538fe7d84cd534213e368bd57d5 [file] [log] [blame]
/*
* Copyright © 2008 Behdad Esfahbod
* Copyright © 2009 Chris Wilson
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include <gtk/gtk.h>
#include <cairo.h>
struct options {
const char *text;
const char *family;
cairo_font_weight_t weight;
cairo_font_slant_t slant;
double size;
int PAD;
const char *png;
};
static void
draw (cairo_t *cr, struct options *options)
{
cairo_text_extents_t extents;
cairo_font_extents_t font_extents;
cairo_select_font_face (cr,
options->family, options->slant, options->weight);
cairo_set_font_size (cr, options->size);
cairo_text_extents (cr, options->text, &extents);
cairo_translate (cr,
options->PAD - extents.x_bearing,
options->PAD - extents.y_bearing);
cairo_font_extents (cr, &font_extents);
cairo_rectangle (cr, 0, -font_extents.ascent,
extents.x_advance, font_extents.height);
cairo_move_to (cr, -options->PAD, 0);
cairo_line_to (cr, extents.width + options->PAD, 0);
cairo_set_source_rgba (cr, 1, 0, 0, .7);
cairo_stroke (cr);
cairo_rectangle (cr,
extents.x_bearing, extents.y_bearing,
extents.width, extents.height);
cairo_set_source_rgba (cr, 0, 1, 0, .7);
cairo_stroke (cr);
cairo_move_to (cr, 0, 0);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_show_text (cr, options->text);
cairo_fill (cr);
}
static gboolean
expose_event (GtkWidget *w, GdkEventExpose *ev, struct options *options)
{
cairo_t *cr;
cr = gdk_cairo_create (w->window);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
draw (cr, options);
cairo_destroy (cr);
if (options->png) {
cairo_surface_t *image;
image = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
w->allocation.width,
w->allocation.height);
cr = cairo_create (image);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
draw (cr, options);
cairo_destroy (cr);
cairo_surface_write_to_png (image, options->png);
cairo_surface_destroy (image);
}
return TRUE;
}
static void
size_request (GtkWidget *w, GtkRequisition *req , struct options *options)
{
cairo_surface_t *dummy;
cairo_t *cr;
cairo_text_extents_t extents;
dummy = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 0, 0);
cr = cairo_create (dummy);
cairo_surface_destroy (dummy);
cairo_select_font_face (cr,
options->family, options->slant, options->weight);
cairo_set_font_size (cr, options->size);
cairo_text_extents (cr, options->text, &extents);
cairo_destroy (cr);
req->width = extents.width + 2 * options->PAD;
req->height = extents.height + 2 * options->PAD;
}
int
main (int argc, char **argv)
{
GtkWidget *window;
struct options options = {
"The Quick Brown Fox Jumps Over The Lazy Dog!",
"@cairo:small-caps",
CAIRO_FONT_WEIGHT_NORMAL,
CAIRO_FONT_SLANT_NORMAL,
48,
30,
"font-view.png"
};
gtk_init (&argc, &argv);
/* rudimentary argument processing */
if (argc >= 2) {
options.family = argv[1];
}
if (argc >= 3) {
if (strcmp (argv[2], "italic") == 0)
options.slant = CAIRO_FONT_SLANT_ITALIC;
else if (strcmp (argv[2], "oblique") == 0)
options.slant = CAIRO_FONT_SLANT_OBLIQUE;
else
options.slant = atoi (argv[2]);
}
if (argc >= 4) {
if (strcmp (argv[3], "bold") == 0)
options.weight = CAIRO_FONT_WEIGHT_BOLD;
else
options.weight = atoi (argv[3]);
}
if (argc >= 5) {
options.size = atof (argv[4]);
}
if (argc >= 6) {
options.text = argv[5];
}
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "size-request",
G_CALLBACK (size_request), &options);
g_signal_connect (window, "expose-event",
G_CALLBACK (expose_event), &options);
g_signal_connect (window, "delete-event",
G_CALLBACK (gtk_main_quit), NULL);
gtk_window_present (GTK_WINDOW (window));
gtk_main ();
return 0;
}