3 * This file is not being used. The gdk_pixbuf_scale() here is not useful
4 * anymore, since we have the new functions in gdk-pixbuf-scale.c.
6 * The rotation function needs to be implemented without libart if it is
7 * to go inside the GdkPixbuf library.
11 gdk_pixbuf_scale (const GdkPixbuf *pixbuf, gint w, gint h)
16 ArtAlphaGamma *alphagamma;
17 ArtPixBuf *art_pixbuf = NULL;
18 GdkPixbuf *copy = NULL;
22 affine[1] = affine[2] = affine[4] = affine[5] = 0;
24 affine[0] = w / (double)(pixbuf->width);
25 affine[3] = h / (double)(pixbuf->height);
27 /* rowstride = w * pixbuf->n_channels; */
30 pixels = art_alloc (h * rowstride);
31 art_rgb_pixbuf_affine (pixels, 0, 0, w, h, rowstride,
33 affine, ART_FILTER_NEAREST, alphagamma);
35 if (pixbuf->art_pixbuf->has_alpha)
37 art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, rowstride);
39 art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, rowstride);
41 copy = gdk_pixbuf_new (art_pixbuf, NULL);
50 gdk_pixbuf_rotate (GdkPixbuf *pixbuf, gdouble angle)
55 double rot[6], trans[6], affine[6];
56 ArtAlphaGamma *alphagamma = NULL;
57 ArtPixBuf *art_pixbuf = NULL;
59 w = pixbuf->art_pixbuf->width;
60 h = pixbuf->art_pixbuf->height;
62 rad = (M_PI * angle / 180.0);
70 trans[0] = trans[3] = 1;
71 trans[1] = trans[2] = 0;
72 trans[4] = -(double)w / 2.0;
73 trans[5] = -(double)h / 2.0;
75 art_affine_multiply(rot, trans, rot);
77 trans[0] = trans[3] = 1;
78 trans[1] = trans[2] = 0;
79 trans[4] = (double)w / 2.0;
80 trans[5] = (double)h / 2.0;
82 art_affine_multiply(affine, rot, trans);
84 g_print("Affine: %e %e %e %e %e %e\n", affine[0], affine[1], affine[2],
85 affine[3], affine[4], affine[5]);
87 /* rowstride = w * pixbuf->art_pixbuf->n_channels; */
90 pixels = art_alloc (h * rowstride);
91 art_rgb_pixbuf_affine (pixels, 0, 0, w, h, rowstride,
93 affine, ART_FILTER_NEAREST, alphagamma);
94 if (pixbuf->art_pixbuf->has_alpha)
96 art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, rowstride);
98 art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, rowstride);
100 art_pixbuf_free (pixbuf->art_pixbuf);
101 pixbuf->art_pixbuf = art_pixbuf;