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annotate libmlk-core/core/window.c @ 261:bfde372bf152

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core: prefix utilities with util_
author David Demelier <markand@malikania.fr>
date Sun, 06 Dec 2020 23:06:34 +0100
parents 37771eaf4245
children 196264679079
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1 /*
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2 * window.c -- basic window 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 <string.h>
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21
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22 #include <SDL.h>
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23
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24 #include "error.h"
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25 #include "util.h"
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26 #include "window.h"
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27 #include "window_p.h"
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28
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29 static struct window_handle handle = {
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30 .win = NULL,
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31 .renderer = NULL
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32 };
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33
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34 static SDL_Cursor *cursors[WINDOW_CURSOR_LAST];
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35
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36 struct window window = {
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37 .handle = &handle
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38 };
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39
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40 static void
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41 load_cursors(void)
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42 {
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43 cursors[WINDOW_CURSOR_ARROW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
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44 cursors[WINDOW_CURSOR_EDIT] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
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45 cursors[WINDOW_CURSOR_WAIT] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_WAIT);
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46 cursors[WINDOW_CURSOR_CROSSHAIR] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_CROSSHAIR);
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47 cursors[WINDOW_CURSOR_SIZE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
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48 cursors[WINDOW_CURSOR_NO] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);
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49 cursors[WINDOW_CURSOR_HAND] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
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50 }
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51
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52 static void
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53 load_framerate(void)
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54 {
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55 SDL_DisplayMode mode;
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56
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57 if (SDL_GetWindowDisplayMode(handle.win, &mode) == 0)
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58 window.framerate = mode.refresh_rate;
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59 }
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60
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61 static void
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62 finish_cursors(void)
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63 {
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64 for (size_t i = 0; i < UTIL_SIZE(cursors); ++i)
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65 if (cursors[i])
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66 SDL_FreeCursor(cursors[i]);
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67 }
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68
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69 static bool
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70 load_window(const char *title, unsigned int w, unsigned int h)
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71 {
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72 return (handle.win = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, 0));
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73 }
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74
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75 static bool
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76 load_renderer(void)
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77 {
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78 return (handle.renderer = SDL_CreateRenderer(handle.win, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC));
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79 }
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80
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81 bool
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82 window_open(const char *title, unsigned int w, unsigned int h)
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83 {
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84 assert(title);
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85
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86 if (!load_window(title, w, h) || !load_renderer())
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87 return errorf("%s", SDL_GetError());
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88
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89 window.w = w;
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90 window.h = h;
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91
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92 load_framerate();
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93 load_cursors();
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94
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95 return true;
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96 }
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98 void
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99 window_set_cursor(enum window_cursor cursor)
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100 {
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101 assert(cursor < WINDOW_CURSOR_LAST);
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102
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103 SDL_SetCursor(cursors[cursor]);
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104 }
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105
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106 void
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107 window_finish(void)
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108 {
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109 if (handle.renderer)
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110 SDL_DestroyRenderer(handle.renderer);
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111 if (handle.win)
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112 SDL_DestroyWindow(handle.win);
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113
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114 finish_cursors();
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115
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116 memset(&handle, 0, sizeof (handle));
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117 }