testcustomcursor.c (6778B)
1 /* 2 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> 3 4 This software is provided 'as-is', without any express or implied 5 warranty. In no event will the authors be held liable for any damages 6 arising from the use of this software. 7 8 Permission is granted to anyone to use this software for any purpose, 9 including commercial applications, and to alter it and redistribute it 10 freely. 11 */ 12 13 #include <stdlib.h> 14 #include <stdio.h> 15 16 #ifdef __EMSCRIPTEN__ 17 #include <emscripten/emscripten.h> 18 #endif 19 20 #include "SDL_test_common.h" 21 22 /* Stolen from the mailing list */ 23 /* Creates a new mouse cursor from an XPM */ 24 25 26 /* XPM */ 27 static const char *arrow[] = { 28 /* width height num_colors chars_per_pixel */ 29 " 32 32 3 1", 30 /* colors */ 31 "X c #000000", 32 ". c #ffffff", 33 " c None", 34 /* pixels */ 35 "X ", 36 "XX ", 37 "X.X ", 38 "X..X ", 39 "X...X ", 40 "X....X ", 41 "X.....X ", 42 "X......X ", 43 "X.......X ", 44 "X........X ", 45 "X.....XXXXX ", 46 "X..X..X ", 47 "X.X X..X ", 48 "XX X..X ", 49 "X X..X ", 50 " X..X ", 51 " X..X ", 52 " X..X ", 53 " XX ", 54 " ", 55 " ", 56 " ", 57 " ", 58 " ", 59 " ", 60 " ", 61 " ", 62 " ", 63 " ", 64 " ", 65 " ", 66 " ", 67 "0,0" 68 }; 69 70 static SDL_Cursor* 71 init_color_cursor(const char *file) 72 { 73 SDL_Cursor *cursor = NULL; 74 SDL_Surface *surface = SDL_LoadBMP(file); 75 if (surface) { 76 if (surface->format->palette) { 77 SDL_SetColorKey(surface, 1, *(Uint8 *) surface->pixels); 78 } else { 79 switch (surface->format->BitsPerPixel) { 80 case 15: 81 SDL_SetColorKey(surface, 1, (*(Uint16 *)surface->pixels) & 0x00007FFF); 82 break; 83 case 16: 84 SDL_SetColorKey(surface, 1, *(Uint16 *)surface->pixels); 85 break; 86 case 24: 87 SDL_SetColorKey(surface, 1, (*(Uint32 *)surface->pixels) & 0x00FFFFFF); 88 break; 89 case 32: 90 SDL_SetColorKey(surface, 1, *(Uint32 *)surface->pixels); 91 break; 92 } 93 } 94 cursor = SDL_CreateColorCursor(surface, 0, 0); 95 SDL_FreeSurface(surface); 96 } 97 return cursor; 98 } 99 100 static SDL_Cursor* 101 init_system_cursor(const char *image[]) 102 { 103 int i, row, col; 104 Uint8 data[4*32]; 105 Uint8 mask[4*32]; 106 int hot_x, hot_y; 107 108 i = -1; 109 for (row=0; row<32; ++row) { 110 for (col=0; col<32; ++col) { 111 if (col % 8) { 112 data[i] <<= 1; 113 mask[i] <<= 1; 114 } else { 115 ++i; 116 data[i] = mask[i] = 0; 117 } 118 switch (image[4+row][col]) { 119 case 'X': 120 data[i] |= 0x01; 121 mask[i] |= 0x01; 122 break; 123 case '.': 124 mask[i] |= 0x01; 125 break; 126 case ' ': 127 break; 128 } 129 } 130 } 131 sscanf(image[4+row], "%d,%d", &hot_x, &hot_y); 132 return SDL_CreateCursor(data, mask, 32, 32, hot_x, hot_y); 133 } 134 135 static SDLTest_CommonState *state; 136 int done; 137 static SDL_Cursor *cursors[1+SDL_NUM_SYSTEM_CURSORS]; 138 static int current_cursor; 139 static int show_cursor; 140 141 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ 142 static void 143 quit(int rc) 144 { 145 SDLTest_CommonQuit(state); 146 exit(rc); 147 } 148 149 void 150 loop() 151 { 152 int i; 153 SDL_Event event; 154 /* Check for events */ 155 while (SDL_PollEvent(&event)) { 156 SDLTest_CommonEvent(state, &event, &done); 157 if (event.type == SDL_MOUSEBUTTONDOWN) { 158 if (event.button.button == SDL_BUTTON_LEFT) { 159 ++current_cursor; 160 if (current_cursor == SDL_arraysize(cursors)) { 161 current_cursor = 0; 162 } 163 SDL_SetCursor(cursors[current_cursor]); 164 } else { 165 show_cursor = !show_cursor; 166 SDL_ShowCursor(show_cursor); 167 } 168 } 169 } 170 171 for (i = 0; i < state->num_windows; ++i) { 172 SDL_Renderer *renderer = state->renderers[i]; 173 SDL_RenderClear(renderer); 174 SDL_RenderPresent(renderer); 175 } 176 #ifdef __EMSCRIPTEN__ 177 if (done) { 178 emscripten_cancel_main_loop(); 179 } 180 #endif 181 } 182 183 int 184 main(int argc, char *argv[]) 185 { 186 int i; 187 const char *color_cursor = NULL; 188 189 /* Enable standard application logging */ 190 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); 191 192 /* Initialize test framework */ 193 state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO); 194 if (!state) { 195 return 1; 196 } 197 for (i = 1; i < argc;) { 198 int consumed; 199 200 consumed = SDLTest_CommonArg(state, i); 201 if (consumed == 0) { 202 color_cursor = argv[i]; 203 break; 204 } 205 if (consumed < 0) { 206 SDLTest_CommonLogUsage(state, argv[0], NULL); 207 quit(1); 208 } 209 i += consumed; 210 } 211 212 if (!SDLTest_CommonInit(state)) { 213 quit(2); 214 } 215 216 for (i = 0; i < state->num_windows; ++i) { 217 SDL_Renderer *renderer = state->renderers[i]; 218 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); 219 SDL_RenderClear(renderer); 220 } 221 222 if (color_cursor) { 223 cursors[0] = init_color_cursor(color_cursor); 224 } else { 225 cursors[0] = init_system_cursor(arrow); 226 } 227 if (!cursors[0]) { 228 SDL_Log("Error, couldn't create cursor\n"); 229 quit(2); 230 } 231 for (i = 0; i < SDL_NUM_SYSTEM_CURSORS; ++i) { 232 cursors[1+i] = SDL_CreateSystemCursor((SDL_SystemCursor)i); 233 if (!cursors[1+i]) { 234 SDL_Log("Error, couldn't create system cursor %d\n", i); 235 quit(2); 236 } 237 } 238 SDL_SetCursor(cursors[0]); 239 240 /* Main render loop */ 241 done = 0; 242 #ifdef __EMSCRIPTEN__ 243 emscripten_set_main_loop(loop, 0, 1); 244 #else 245 while (!done) { 246 loop(); 247 } 248 #endif 249 250 for (i = 0; i < SDL_arraysize(cursors); ++i) { 251 SDL_FreeCursor(cursors[i]); 252 } 253 quit(0); 254 255 /* keep the compiler happy ... */ 256 return(0); 257 } 258 259 /* vi: set ts=4 sw=4 expandtab: */