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Add gdk-pixbuf support

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When imaging support is required, we prefer to use gdk-pixbuf,
as it's already on things like Live CDs.
Also fix the examples building against the system libfprint.
This commit is contained in:
Bastien Nocera
2008-10-29 12:53:24 +00:00
parent 911c6bf102
commit 014b933b2b
4 changed files with 123 additions and 15 deletions
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10
libfprint/Makefile.am
View File

@@ -105,8 +105,14 @@ endif
if REQUIRE_IMAGEMAGICK
OTHER_SRC += imagemagick.c
libfprint_la_CFLAGS += $(IMAGEMAGICK_CFLAGS)
libfprint_la_LIBADD += $(IMAGEMAGICK_LIBS)
libfprint_la_CFLAGS += $(IMAGING_CFLAGS)
libfprint_la_LIBADD += $(IMAGING_LIBS)
endif
if REQUIRE_GDKPIXBUF
OTHER_SRC += gdkpixbuf.c
libfprint_la_CFLAGS += $(IMAGING_CFLAGS)
libfprint_la_LIBADD += $(IMAGING_LIBS)
endif
if REQUIRE_AESLIB

88
libfprint/gdkpixbuf.c Normal file
View File

@@ -0,0 +1,88 @@
/*
* Imaging utility functions for libfprint
* Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <errno.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "fp_internal.h"
struct fp_img *fpi_im_resize(struct fp_img *img, unsigned int factor)
{
int new_width = img->width * factor;
int new_height = img->height * factor;
GdkPixbuf *orig, *resized;
struct fp_img *newimg;
guchar *pixels;
guint y;
int rowstride;
g_type_init ();
/* It is possible to implement resizing using a simple algorithm, however
* we use gdk-pixbuf because it applies some kind of smoothing to the
* result, which improves matching performances in my experiments. */
/* Create the original pixbuf, and fill it in from the grayscale data */
orig = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
FALSE,
8,
img->width,
img->height);
rowstride = gdk_pixbuf_get_rowstride (orig);
pixels = gdk_pixbuf_get_pixels (orig);
for (y = 0; y < img->height; y++) {
guint x;
for (x = 0; x < img->width; x++) {
guchar *p, *r;
p = pixels + y * rowstride + x * 3;
r = img->data + y * img->width + x;
p[0] = r[0];
p[1] = r[0];
p[2] = r[0];
}
}
/* Resize the pixbuf, and create the new fp_img */
resized = gdk_pixbuf_scale_simple (orig, new_width, new_height, GDK_INTERP_HYPER);
g_object_unref (orig);
newimg = fpi_img_new(new_width * new_height);
newimg->width = new_width;
newimg->height = new_height;
newimg->flags = img->flags;
rowstride = gdk_pixbuf_get_rowstride (resized);
pixels = gdk_pixbuf_get_pixels (resized);
for (y = 0; y < newimg->height; y++) {
guint x;
for (x = 0; x < newimg->width; x++) {
guchar *p, *r;
r = img->data + y * img->width + x;
p = pixels + y * rowstride + x * 3;
r[0] = p[0];
}
}
g_object_unref (resized);
return newimg;
}