test/testcustomcursor.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 23 May 2019 14:19:00 -0700
changeset 12756 4116bf232fe7
parent 12503 806492103856
child 12758 3c6a6dad3487
permissions -rw-r--r--
Added a function to get the current Android SDK version at runtime
     1 /*
     2   Copyright (C) 1997-2019 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             SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
   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: */