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annotate src/font.c @ 10:c91c3272101b

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core: implement fonts, closes #2444
author David Demelier <markand@malikania.fr>
date Tue, 07 Jan 2020 20:28:35 +0100
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children d1cdb90d9558
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10
c91c3272101b core: implement fonts, closes #2444
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1 /*
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2 * font.c -- basic font management
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <stdbool.h>
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21 #include <stdio.h>
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22
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23 #include <SDL_ttf.h>
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24
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25 #include "font.h"
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26 #include "texture_p.h"
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27
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28 struct font {
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29 TTF_Font *handle;
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30 };
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31
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32 struct font *
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33 font_openf(const char *path, unsigned size)
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34 {
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35 assert(path);
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36
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37 struct font *f;
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38
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39 if (!(f = calloc(1, sizeof (struct font))))
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40 return NULL;
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41 if (!(f->handle = TTF_OpenFont(path, size))) {
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42 free(f);
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43 return NULL;
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44 }
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45
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46 return f;
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47 }
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48
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49 struct font *
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50 font_openb(const void *buffer, size_t buflen, unsigned size)
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51 {
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52 struct font *f;
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53 SDL_RWops *ops;
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54
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55 assert(buffer);
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56
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57 if (!(f = calloc(1, sizeof (struct font))))
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58 return NULL;
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59
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60 if (!(ops = SDL_RWFromConstMem(buffer, buflen))) {
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61 free(f);
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62 return NULL;
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63 }
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64
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65 if (!(f->handle = TTF_OpenFontRW(ops, true, size))) {
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66 free(f);
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67 return NULL;
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68 }
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69
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70 return NULL;
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71 }
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72
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73 struct texture *
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74 font_render(struct font *font, const char *text, uint32_t color)
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75 {
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76 assert(font);
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77 assert(text);
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78
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79 /* TODO: refactor this with window.c */
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80 SDL_Color fg = {
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81 .r = color >> 24 & 0xff,
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82 .g = color >> 16 & 0xff,
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83 .b = color >> 8 & 0xff,
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84 .a = color & 0xff
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85 };
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86
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87 return texture_from_surface(TTF_RenderUTF8_Blended(font->handle, text, fg));
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88 }
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89
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90 void
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91 font_close(struct font *font)
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92 {
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93 TTF_CloseFont(font->handle);
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94 free(font);
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95 }