targets/sdl/tests/trianglefps.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2010 Jiri "BlueBear" Dluhos                            *
  20  *                         <jiri.bluebear.dluhos@gmail.com>                  *
  21  *                                                                           *
  22  * Copyright (C) 2009-2010 Cyril Hrubis <metan@ucw.cz>                       *
  23  *                                                                           *
  24  *****************************************************************************/
  25
  26 #include <math.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <SDL/SDL.h>
  30
  31 #include "GP.h"
  32 #include "GP_SDL.h"
  33
  34 /* Draw filled triangles? */
  35 int filled = 0;
  36
  37 /* The surface used as a display (in fact it is a software surface). */
  38 SDL_Surface *display = NULL;
  39 GP_Context context;
  40
  41 /* Frames per second. */
  42 int fps = 0, fps_min = 1000000, fps_max = 0;
  43
  44 /* Color pixel values in display format. */
  45 GP_Pixel black, white;
  46
  47 /*
  48  * Timer used for FPS measurement and key reactions.
  49  * SDL_USEREVENT is triggered each second.
  50  */
  51
  52 SDL_TimerID timer;
  53
  54 SDL_UserEvent timer_event;
  55
  56 Uint32 timer_callback(__attribute__((unused)) Uint32 interval,
  57                         __attribute__((unused)) void * param)
  58 {
  59         timer_event.type = SDL_USEREVENT;
  60         SDL_PushEvent((SDL_Event *) &timer_event);
  61         return 1000;
  62 }
  63
  64
  65 void draw_frame(void)
  66 {
  67         int x0 = 0;
  68         int y0 = random() % display->h;
  69         int x1 = display->w;
  70         int y1 = random() % display->h;
  71         int x2 = display->w/2;
  72         int y2 = random() % display->h;
  73         GP_Color color = GP_RGB888_PACK(random() % 255, random() % 255, random() % 255);
  74
  75         GP_Pixel pixel;
  76         GP_ColorToPixel(&context, color, &pixel);
  77
  78         if (filled) {
  79                 GP_FillTriangle(&context, x0, y0, x1, y1, x2, y2, pixel);
  80         } else {
  81                 GP_Triangle(&context, x0, y0, x1, y1, x2, y2, pixel);
  82         }
  83 }
  84
  85 void event_loop(void)
  86 {
  87         SDL_Event event;
  88
  89         for (;;) {
  90                 while (SDL_PollEvent(&event) > 0) {
  91                         switch (event.type) {
  92                                 case SDL_USEREVENT:
  93                                         SDL_Flip(display);
  94                                         fprintf(stdout, "%d triangles/second, min = %d, max = %d\r", fps, fps_min, fps_max);
  95                                         fflush(stdout);
  96
  97                                         /* Update frames per second */
  98                                         if (fps < fps_min)
  99                                                 fps_min = fps;
 100                                         if (fps > fps_max)
 101                                                 fps_max = fps;
 102                                         fps = 0;
 103                                 break;
 104                                 case SDL_KEYDOWN:
 105                                 case SDL_QUIT:
 106                                         return;
 107                         }
 108                 }
 109                 draw_frame();
 110                 fps++;
 111         }
 112 }
 113
 114 int main(int argc, char ** argv)
 115 {
 116         int bit_depth = 0;
 117
 118         int i;
 119         for (i = 1; i < argc; i++) {
 120                 if (strcmp(argv[i], "-f") == 0) {
 121                         filled = 1;
 122                 }
 123                 else if (strcmp(argv[i], "-16") == 0) {
 124                         bit_depth = 16;
 125                 }
 126                 else if (strcmp(argv[i], "-24") == 0) {
 127                         bit_depth = 24;
 128                 }
 129                 else if (strcmp(argv[i], "-32") == 0) {
 130                         bit_depth = 32;
 131                 }
 132         }
 133
 134         /* Initialize SDL */
 135         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
 136                 fprintf(stderr, "Could not initialize SDL: %s\n", SDL_GetError());
 137                 return 1;
 138         }
 139
 140         /* Create a window with a software back surface */
 141         display = SDL_SetVideoMode(640, 480, bit_depth, SDL_SWSURFACE);
 142         if (display == NULL) {
 143                 fprintf(stderr, "Could not open display: %s\n", SDL_GetError());
 144                 goto fail;
 145         }
 146
 147         /* Print basic information about the surface */
 148         printf("Display surface properties:\n");
 149         printf("    width: %4d, height: %4d, pitch: %4d\n",
 150                display->w, display->h, display->pitch);
 151         printf("    bits per pixel: %2d, bytes per pixel: %2d\n",
 152                display->format->BitsPerPixel, display->format->BytesPerPixel);
 153         printf("Machine properties:\n");
 154         printf("    sizeof(int) = %u, sizeof(long) = %u\n",
 155                (unsigned int)sizeof(int), (unsigned int)sizeof(long));
 156
 157         /* Set up a clipping rectangle to test proper clipping of pixels */
 158         SDL_Rect clip_rect = { 10, 10, 620, 460 };
 159         SDL_SetClipRect(display, &clip_rect);
 160
 161         GP_SDL_ContextFromSurface(&context, display);
 162
 163         GP_ColorNameToPixel(&context, GP_COL_WHITE, &white);
 164         GP_ColorNameToPixel(&context, GP_COL_BLACK, &black);
 165
 166         /* Set up the timer */
 167         timer = SDL_AddTimer(1000, timer_callback, NULL);
 168         if (timer == 0) {
 169                 fprintf(stderr, "Could not set up timer: %s\n", SDL_GetError());
 170                 goto fail;
 171         }
 172
 173         /* Enter the event loop */
 174         event_loop();
 175
 176         /* Preserve the last result by a newline */
 177         fprintf(stdout, "\n");
 178
 179         /* We're done */
 180         SDL_Quit();
 181         return 0;
 182
 183 fail:
 184         SDL_Quit();
 185         return 1;
 186 }
 187