Mercurial > molko
comparison src/libmlk-core/core/font.c @ 320:8f9937403749
misc: improve loading of data
author | David Demelier <markand@malikania.fr> |
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date | Fri, 01 Oct 2021 20:30:00 +0200 |
parents | libmlk-core/core/font.c@d01e83210ca2 |
children | 979960e65f76 |
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319:b843eef4cc35 | 320:8f9937403749 |
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1 /* | |
2 * font.c -- basic font management | |
3 * | |
4 * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr> | |
5 * | |
6 * Permission to use, copy, modify, and/or distribute this software for any | |
7 * purpose with or without fee is hereby granted, provided that the above | |
8 * copyright notice and this permission notice appear in all copies. | |
9 * | |
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 */ | |
18 | |
19 #include <assert.h> | |
20 #include <string.h> | |
21 | |
22 #include <SDL_ttf.h> | |
23 | |
24 #include "color.h" | |
25 #include "error.h" | |
26 #include "font.h" | |
27 #include "texture_p.h" | |
28 #include "util.h" | |
29 | |
30 int | |
31 font_open(struct font *font, const char *path, unsigned int size) | |
32 { | |
33 assert(font); | |
34 assert(path); | |
35 | |
36 if (!(font->handle = TTF_OpenFont(path, size))) | |
37 return errorf("%s", SDL_GetError()); | |
38 | |
39 return 0; | |
40 } | |
41 | |
42 int | |
43 font_openmem(struct font *font, const void *buffer, size_t buflen, unsigned int size) | |
44 { | |
45 assert(font); | |
46 assert(buffer); | |
47 | |
48 SDL_RWops *ops; | |
49 | |
50 if (!(ops = SDL_RWFromConstMem(buffer, buflen)) || | |
51 (!(font->handle = TTF_OpenFontRW(ops, 1, size)))) | |
52 return errorf("%s", SDL_GetError()); | |
53 | |
54 return 0; | |
55 } | |
56 | |
57 int | |
58 font_ok(const struct font *font) | |
59 { | |
60 return font && font->handle; | |
61 } | |
62 | |
63 int | |
64 font_render(struct font *font, struct texture *tex, const char *text, unsigned int color) | |
65 { | |
66 assert(font_ok(font)); | |
67 assert(text); | |
68 | |
69 SDL_Color fg = { | |
70 .r = COLOR_R(color), | |
71 .g = COLOR_G(color), | |
72 .b = COLOR_B(color), | |
73 .a = COLOR_A(color) | |
74 }; | |
75 SDL_Surface *surface; | |
76 SDL_Surface *(*func)(TTF_Font *, const char *, SDL_Color); | |
77 | |
78 switch (font->style) { | |
79 case FONT_STYLE_ANTIALIASED: | |
80 func = TTF_RenderUTF8_Blended; | |
81 break; | |
82 default: | |
83 func = TTF_RenderUTF8_Solid; | |
84 break; | |
85 } | |
86 | |
87 if (!(surface = func(font->handle, text, fg))) | |
88 return errorf("%s", SDL_GetError()); | |
89 | |
90 return texture_from_surface(tex, surface); | |
91 } | |
92 | |
93 unsigned int | |
94 font_height(const struct font *font) | |
95 { | |
96 assert(font_ok(font)); | |
97 | |
98 return TTF_FontHeight(font->handle); | |
99 } | |
100 | |
101 int | |
102 font_query(const struct font *font, const char *text, unsigned int *w, unsigned int *h) | |
103 { | |
104 assert(font_ok(font)); | |
105 assert(text); | |
106 | |
107 if (w) | |
108 *w = 0; | |
109 if (h) | |
110 *h = 0; | |
111 | |
112 if (TTF_SizeUTF8(font->handle, text, (int *)w, (int *)h) != 0) | |
113 return errorf("%s", SDL_GetError()); | |
114 | |
115 return 0; | |
116 } | |
117 | |
118 void | |
119 font_finish(struct font *font) | |
120 { | |
121 assert(font); | |
122 | |
123 if (font->handle) | |
124 TTF_CloseFont(font->handle); | |
125 | |
126 memset(font, 0, sizeof (*font)); | |
127 } |