1 /*
2 * Copyright © 2012 Google, Inc.
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 *
24 * Google Author(s): Behdad Esfahbod
25 */
26
27 #include "helper-cairo-ansi.hh"
28 #include "options.hh"
29
30 #include "ansi-print.hh"
31
32
33 cairo_status_t
helper_cairo_surface_write_to_ansi_stream(cairo_surface_t * surface,cairo_write_func_t write_func,void * closure)34 helper_cairo_surface_write_to_ansi_stream (cairo_surface_t *surface,
35 cairo_write_func_t write_func,
36 void *closure)
37 {
38 unsigned int width = cairo_image_surface_get_width (surface);
39 unsigned int height = cairo_image_surface_get_height (surface);
40 if (cairo_image_surface_get_format (surface) != CAIRO_FORMAT_RGB24) {
41 cairo_surface_t *new_surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
42 cairo_t *cr = cairo_create (new_surface);
43 if (cairo_image_surface_get_format (surface) == CAIRO_FORMAT_A8) {
44 cairo_set_source_rgb (cr, 0., 0., 0.);
45 cairo_paint (cr);
46 cairo_set_source_rgb (cr, 1., 1., 1.);
47 cairo_mask_surface (cr, surface, 0, 0);
48 } else {
49 cairo_set_source_rgb (cr, 1., 1., 1.);
50 cairo_paint (cr);
51 cairo_set_source_surface (cr, surface, 0, 0);
52 cairo_paint (cr);
53 }
54 cairo_destroy (cr);
55 surface = new_surface;
56 } else
57 cairo_surface_reference (surface);
58
59 unsigned int stride = cairo_image_surface_get_stride (surface);
60 const uint32_t *data = (uint32_t *) (void *) cairo_image_surface_get_data (surface);
61
62 /* We don't have rows to spare on the terminal window...
63 * Find the tight image top/bottom and only print in between. */
64
65 /* Use corner color as background color. */
66 uint32_t bg_color = data ? * (uint32_t *) data : 0;
67
68 /* Drop first row while empty */
69 while (height)
70 {
71 unsigned int i;
72 for (i = 0; i < width; i++)
73 if (data[i] != bg_color)
74 break;
75 if (i < width)
76 break;
77 data += stride / 4;
78 height--;
79 }
80
81 /* Drop last row while empty */
82 unsigned int orig_height = height;
83 while (height)
84 {
85 const uint32_t *row = data + (height - 1) * stride / 4;
86 unsigned int i;
87 for (i = 0; i < width; i++)
88 if (row[i] != bg_color)
89 break;
90 if (i < width)
91 break;
92 height--;
93 }
94 if (height < orig_height)
95 height++; /* Add one last blank row for padding. */
96
97 if (width && height)
98 ansi_print_image_rgb24 (data, width, height, stride / 4);
99
100 cairo_surface_destroy (surface);
101 return CAIRO_STATUS_SUCCESS;
102 }
103