1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* See LICENSE file for copyright and license details. */
#include "libskrift.h"
#include <stdlib.h>
#include <string.h>
int
main(void)
{
LIBSKRIFT_FONT *font;
LIBSKRIFT_CONTEXT *ctx;
struct libskrift_image image = {LIBSKRIFT_R8G8B8A8, LIBSKRIFT_HOST_SUBPIXEL, 0, 800, 600, NULL, NULL, NULL};
struct libskrift_rendering rendering = LIBSKRIFT_DEFAULT_RENDERING;
struct libskrift_colour colour = LIBSKRIFT_PREMULTIPLY(.80f, .50f, .80f, .50f, .20f);
double height;
size_t size, i;
rendering.smoothing = LIBSKRIFT_SUBPIXEL;
rendering.subpixel_order = LIBSKRIFT_NONE;
rendering.flags = LIBSKRIFT_MIRROR_CHARS * 0;
rendering.interletter_spacing = -5;
if (libskrift_open_font_file(&font, DEMO_FONT)) {
perror("libskrift_open_font_file");
return -1;
}
libskrift_add_rotation_degrees(rendering.text_transformation, -10);
libskrift_add_shear(rendering.char_transformation, .75f, 0);
height = libskrift_points_to_pixels(72, &rendering);
if (libskrift_create_context(&ctx, &font, 1, height, &rendering, NULL)) {
perror("libskrift_create_context");
return -1;
}
libskrift_close_font(font);
size = 4;
size *= (size_t)image.width;
size *= (size_t)image.height;
image.image = malloc(size);
if (!image.image) {
perror("malloc");
return -1;
}
for (i = 0; i < size; i += 4) {
((uint8_t *)image.image)[i + 0] = 32U;
((uint8_t *)image.image)[i + 1] = 48U;
((uint8_t *)image.image)[i + 2] = 64U;
((uint8_t *)image.image)[i + 3] = 250U;
}
if (libskrift_draw_text(ctx, "hello world", &colour, 0, 300, &image) < 0) {
perror("libskrift_draw_text");
return -1;
}
printf("P7\n");
printf("WIDTH %u\n", image.width);
printf("HEIGHT %u\n", image.height);
printf("DEPTH 4\n");
printf("MAXVAL 255\n");
printf("TUPLTYPE RGB_ALPHA\n");
printf("ENDHDR\n");
fwrite(image.image, 1, size, stdout);
fflush(stdout);
free(image.image);
libskrift_free_context(ctx);
return 0;
}
|
