test/testdraw2.c
changeset 2901 133601e3b255
child 2902 83c3a4b0e421
equal deleted inserted replaced
2900:3a9636c83849 2901:133601e3b255
       
     1 
       
     2 /* Simple program:  draw as many random objects on the screen as possible */
       
     3 
       
     4 #include <stdlib.h>
       
     5 #include <stdio.h>
       
     6 #include <time.h>
       
     7 
       
     8 #include "common.h"
       
     9 
       
    10 #define NUM_OBJECTS	100
       
    11 
       
    12 static CommonState *state;
       
    13 static int num_objects;
       
    14 static SDL_bool cycle_color;
       
    15 static SDL_bool cycle_alpha;
       
    16 static int cycle_direction = 1;
       
    17 static int current_alpha = 255;
       
    18 static int current_color = 255;
       
    19 static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
       
    20 
       
    21 void
       
    22 DrawPoints(SDL_WindowID window)
       
    23 {
       
    24     int i;
       
    25     int x, y;
       
    26     int window_w, window_h;
       
    27 
       
    28     /* Query the sizes */
       
    29     SDL_GetWindowSize(window, &window_w, &window_h);
       
    30 
       
    31     SDL_SetRenderDrawBlendMode(blendMode);
       
    32     for (i = 0; i < num_objects; ++i) {
       
    33         /* Cycle the color and alpha, if desired */
       
    34         if (cycle_color) {
       
    35             current_color += cycle_direction;
       
    36             if (current_color < 0) {
       
    37                 current_color = 0;
       
    38                 cycle_direction = -cycle_direction;
       
    39             }
       
    40             if (current_color > 255) {
       
    41                 current_color = 255;
       
    42                 cycle_direction = -cycle_direction;
       
    43             }
       
    44         }
       
    45         if (cycle_alpha) {
       
    46             current_alpha += cycle_direction;
       
    47             if (current_alpha < 0) {
       
    48                 current_alpha = 0;
       
    49                 cycle_direction = -cycle_direction;
       
    50             }
       
    51             if (current_alpha > 255) {
       
    52                 current_alpha = 255;
       
    53                 cycle_direction = -cycle_direction;
       
    54             }
       
    55         }
       
    56         SDL_SetRenderDrawColor(255, (Uint8) current_color,
       
    57                                (Uint8) current_color, (Uint8) current_alpha);
       
    58 
       
    59         x = rand() % window_w;
       
    60         y = rand() % window_h;
       
    61         SDL_RenderPoint(x, y);
       
    62     }
       
    63     SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
       
    64 }
       
    65 
       
    66 void
       
    67 DrawLines(SDL_WindowID window)
       
    68 {
       
    69     int i;
       
    70     int x1, y1, x2, y2;
       
    71     int window_w, window_h;
       
    72 
       
    73     /* Query the sizes */
       
    74     SDL_GetWindowSize(window, &window_w, &window_h);
       
    75 
       
    76     SDL_SetRenderDrawBlendMode(blendMode);
       
    77     for (i = 0; i < num_objects; ++i) {
       
    78         /* Cycle the color and alpha, if desired */
       
    79         if (cycle_color) {
       
    80             current_color += cycle_direction;
       
    81             if (current_color < 0) {
       
    82                 current_color = 0;
       
    83                 cycle_direction = -cycle_direction;
       
    84             }
       
    85             if (current_color > 255) {
       
    86                 current_color = 255;
       
    87                 cycle_direction = -cycle_direction;
       
    88             }
       
    89         }
       
    90         if (cycle_alpha) {
       
    91             current_alpha += cycle_direction;
       
    92             if (current_alpha < 0) {
       
    93                 current_alpha = 0;
       
    94                 cycle_direction = -cycle_direction;
       
    95             }
       
    96             if (current_alpha > 255) {
       
    97                 current_alpha = 255;
       
    98                 cycle_direction = -cycle_direction;
       
    99             }
       
   100         }
       
   101         SDL_SetRenderDrawColor(255, (Uint8) current_color,
       
   102                                (Uint8) current_color, (Uint8) current_alpha);
       
   103 
       
   104         if (i == 0) {
       
   105             SDL_RenderLine(0, 0, window_w, window_h);
       
   106             SDL_RenderLine(0, window_h, window_w, 0);
       
   107             SDL_RenderLine(0, window_h / 2, window_w, window_h / 2);
       
   108             SDL_RenderLine(window_w / 2, 0, window_w / 2, window_h);
       
   109         } else {
       
   110             x1 = rand() % window_w;
       
   111             x2 = rand() % window_w;
       
   112             y1 = rand() % window_h;
       
   113             y2 = rand() % window_h;
       
   114             SDL_RenderLine(x1, y1, x2, y2);
       
   115         }
       
   116     }
       
   117     SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
       
   118 }
       
   119 
       
   120 void
       
   121 DrawRects(SDL_WindowID window)
       
   122 {
       
   123     int i;
       
   124     SDL_Rect rect;
       
   125     int window_w, window_h;
       
   126 
       
   127     /* Query the sizes */
       
   128     SDL_GetWindowSize(window, &window_w, &window_h);
       
   129 
       
   130     SDL_SetRenderDrawBlendMode(blendMode);
       
   131     for (i = 0; i < num_objects/4; ++i) {
       
   132         /* Cycle the color and alpha, if desired */
       
   133         if (cycle_color) {
       
   134             current_color += cycle_direction;
       
   135             if (current_color < 0) {
       
   136                 current_color = 0;
       
   137                 cycle_direction = -cycle_direction;
       
   138             }
       
   139             if (current_color > 255) {
       
   140                 current_color = 255;
       
   141                 cycle_direction = -cycle_direction;
       
   142             }
       
   143         }
       
   144         if (cycle_alpha) {
       
   145             current_alpha += cycle_direction;
       
   146             if (current_alpha < 0) {
       
   147                 current_alpha = 0;
       
   148                 cycle_direction = -cycle_direction;
       
   149             }
       
   150             if (current_alpha > 255) {
       
   151                 current_alpha = 255;
       
   152                 cycle_direction = -cycle_direction;
       
   153             }
       
   154         }
       
   155         SDL_SetRenderDrawColor(255, (Uint8) current_color,
       
   156                                (Uint8) current_color, (Uint8) current_alpha);
       
   157 
       
   158         rect.w = rand() % (window_h / 2);
       
   159         rect.h = rand() % (window_h / 2);
       
   160         rect.x = (rand() % window_w) - (rect.w / 2);
       
   161         rect.y = (rand() % window_w) - (rect.h / 2);
       
   162         SDL_RenderFill(&rect);
       
   163     }
       
   164     SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
       
   165 }
       
   166 
       
   167 int
       
   168 main(int argc, char *argv[])
       
   169 {
       
   170     int i, done;
       
   171     SDL_Event event;
       
   172     Uint32 then, now, frames;
       
   173 
       
   174     /* Initialize parameters */
       
   175     num_objects = NUM_OBJECTS;
       
   176 
       
   177     /* Initialize test framework */
       
   178     state = CommonCreateState(argv, SDL_INIT_VIDEO);
       
   179     if (!state) {
       
   180         return 1;
       
   181     }
       
   182     for (i = 1; i < argc;) {
       
   183         int consumed;
       
   184 
       
   185         consumed = CommonArg(state, i);
       
   186         if (consumed == 0) {
       
   187             consumed = -1;
       
   188             if (SDL_strcasecmp(argv[i], "--blend") == 0) {
       
   189                 if (argv[i + 1]) {
       
   190                     if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
       
   191                         blendMode = SDL_BLENDMODE_NONE;
       
   192                         consumed = 2;
       
   193                     } else if (SDL_strcasecmp(argv[i + 1], "mask") == 0) {
       
   194                         blendMode = SDL_BLENDMODE_MASK;
       
   195                         consumed = 2;
       
   196                     } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
       
   197                         blendMode = SDL_BLENDMODE_BLEND;
       
   198                         consumed = 2;
       
   199                     } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
       
   200                         blendMode = SDL_BLENDMODE_ADD;
       
   201                         consumed = 2;
       
   202                     } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
       
   203                         blendMode = SDL_BLENDMODE_MOD;
       
   204                         consumed = 2;
       
   205                     }
       
   206                 }
       
   207             } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
       
   208                 cycle_color = SDL_TRUE;
       
   209                 consumed = 1;
       
   210             } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
       
   211                 cycle_alpha = SDL_TRUE;
       
   212                 consumed = 1;
       
   213             } else if (SDL_isdigit(*argv[i])) {
       
   214                 num_objects = SDL_atoi(argv[i]);
       
   215                 consumed = 1;
       
   216             }
       
   217         }
       
   218         if (consumed < 0) {
       
   219             fprintf(stderr,
       
   220                     "Usage: %s %s [--blend none|mask|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
       
   221                     argv[0], CommonUsage(state));
       
   222             return 1;
       
   223         }
       
   224         i += consumed;
       
   225     }
       
   226     if (!CommonInit(state)) {
       
   227         return 2;
       
   228     }
       
   229 
       
   230     /* Create the windows and initialize the renderers */
       
   231     for (i = 0; i < state->num_windows; ++i) {
       
   232         SDL_SelectRenderer(state->windows[i]);
       
   233         SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
       
   234         SDL_RenderFill(NULL);
       
   235     }
       
   236 
       
   237     srand(time(NULL));
       
   238 
       
   239     /* Main render loop */
       
   240     frames = 0;
       
   241     then = SDL_GetTicks();
       
   242     done = 0;
       
   243     while (!done) {
       
   244         /* Check for events */
       
   245         ++frames;
       
   246         while (SDL_PollEvent(&event)) {
       
   247             CommonEvent(state, &event, &done);
       
   248             switch (event.type) {
       
   249             case SDL_WINDOWEVENT:
       
   250                 switch (event.window.event) {
       
   251                 case SDL_WINDOWEVENT_EXPOSED:
       
   252                     SDL_SelectRenderer(event.window.windowID);
       
   253                     SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
       
   254                     SDL_RenderFill(NULL);
       
   255                     break;
       
   256                 }
       
   257                 break;
       
   258             default:
       
   259                 break;
       
   260             }
       
   261         }
       
   262         for (i = 0; i < state->num_windows; ++i) {
       
   263             SDL_SelectRenderer(state->windows[i]);
       
   264             SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
       
   265             SDL_RenderFill(NULL);
       
   266 
       
   267             DrawRects(state->windows[i]);
       
   268             DrawLines(state->windows[i]);
       
   269             DrawPoints(state->windows[i]);
       
   270 
       
   271             SDL_RenderPresent();
       
   272         }
       
   273     }
       
   274 
       
   275     /* Print out some timing information */
       
   276     now = SDL_GetTicks();
       
   277     if (now > then) {
       
   278         double fps = ((double) frames * 1000) / (now - then);
       
   279         printf("%2.2f frames per second\n", fps);
       
   280     }
       
   281     return 0;
       
   282 }
       
   283 
       
   284 /* vi: set ts=4 sw=4 expandtab: */