test/testgles.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 25 Jul 2013 09:51:21 -0700
changeset 7517 965d57022c01
parent 6785 c094c438c0a6
child 7639 9406b7dd2f2d
permissions -rw-r--r--
Updated the copyright year for the test programs
     1 /*
     2   Copyright (C) 1997-2013 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 #include <stdlib.h>
    13 #include <stdio.h>
    14 #include <string.h>
    15 #include <math.h>
    16 
    17 #include "SDL_test_common.h"
    18 
    19 #if defined(__IPHONEOS__) || defined(__ANDROID__)
    20 #define HAVE_OPENGLES
    21 #endif
    22 
    23 #ifdef HAVE_OPENGLES
    24 
    25 #include "SDL_opengles.h"
    26 
    27 static SDLTest_CommonState *state;
    28 static SDL_GLContext *context = NULL;
    29 static int depth = 16;
    30 
    31 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    32 static void
    33 quit(int rc)
    34 {
    35     int i;
    36 
    37     if (context != NULL) {
    38         for (i = 0; i < state->num_windows; i++) {
    39             if (context[i]) {
    40                 SDL_GL_DeleteContext(context[i]);
    41             }
    42         }
    43 
    44         SDL_free(context);
    45     }
    46 
    47     SDLTest_CommonQuit(state);
    48     exit(rc);
    49 }
    50 
    51 static void
    52 Render()
    53 {
    54     static GLubyte color[8][4] = { {255, 0, 0, 0},
    55     {255, 0, 0, 255},
    56     {0, 255, 0, 255},
    57     {0, 255, 0, 255},
    58     {0, 255, 0, 255},
    59     {255, 255, 255, 255},
    60     {255, 0, 255, 255},
    61     {0, 0, 255, 255}
    62     };
    63     static GLfloat cube[8][3] = { {0.5, 0.5, -0.5},
    64     {0.5f, -0.5f, -0.5f},
    65     {-0.5f, -0.5f, -0.5f},
    66     {-0.5f, 0.5f, -0.5f},
    67     {-0.5f, 0.5f, 0.5f},
    68     {0.5f, 0.5f, 0.5f},
    69     {0.5f, -0.5f, 0.5f},
    70     {-0.5f, -0.5f, 0.5f}
    71     };
    72     static GLubyte indices[36] = { 0, 3, 4,
    73         4, 5, 0,
    74         0, 5, 6,
    75         6, 1, 0,
    76         6, 7, 2,
    77         2, 1, 6,
    78         7, 4, 3,
    79         3, 2, 7,
    80         5, 4, 7,
    81         7, 6, 5,
    82         2, 3, 1,
    83         3, 0, 1
    84     };
    85 
    86 
    87     /* Do our drawing, too. */
    88     glClearColor(0.0, 0.0, 0.0, 1.0);
    89     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    90 
    91     /* Draw the cube */
    92     glColorPointer(4, GL_UNSIGNED_BYTE, 0, color);
    93     glEnableClientState(GL_COLOR_ARRAY);
    94     glVertexPointer(3, GL_FLOAT, 0, cube);
    95     glEnableClientState(GL_VERTEX_ARRAY);
    96     glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_BYTE, indices);
    97 
    98     glMatrixMode(GL_MODELVIEW);
    99     glRotatef(5.0, 1.0, 1.0, 1.0);
   100 }
   101 
   102 int
   103 main(int argc, char *argv[])
   104 {
   105     int fsaa, accel;
   106     int value;
   107     int i, done;
   108     SDL_DisplayMode mode;
   109     SDL_Event event;
   110     Uint32 then, now, frames;
   111     int status;
   112 
   113     /* Initialize parameters */
   114     fsaa = 0;
   115     accel = 0;
   116 
   117     /* Initialize test framework */
   118     state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
   119     if (!state) {
   120         return 1;
   121     }
   122     for (i = 1; i < argc;) {
   123         int consumed;
   124 
   125         consumed = SDLTest_CommonArg(state, i);
   126         if (consumed == 0) {
   127             if (SDL_strcasecmp(argv[i], "--fsaa") == 0) {
   128                 ++fsaa;
   129                 consumed = 1;
   130             } else if (SDL_strcasecmp(argv[i], "--accel") == 0) {
   131                 ++accel;
   132                 consumed = 1;
   133             } else if (SDL_strcasecmp(argv[i], "--zdepth") == 0) {
   134                 i++;
   135                 if (!argv[i]) {
   136                     consumed = -1;
   137                 } else {
   138                     depth = SDL_atoi(argv[i]);
   139                     consumed = 1;
   140                 }
   141             } else {
   142                 consumed = -1;
   143             }
   144         }
   145         if (consumed < 0) {
   146             fprintf(stderr, "Usage: %s %s [--fsaa] [--accel] [--zdepth %%d]\n", argv[0],
   147                     SDLTest_CommonUsage(state));
   148             quit(1);
   149         }
   150         i += consumed;
   151     }
   152 
   153     /* Set OpenGL parameters */
   154     state->window_flags |= SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_BORDERLESS;
   155     state->gl_red_size = 5;
   156     state->gl_green_size = 5;
   157     state->gl_blue_size = 5;
   158     state->gl_depth_size = depth;
   159     if (fsaa) {
   160         state->gl_multisamplebuffers=1;
   161         state->gl_multisamplesamples=fsaa;
   162     }
   163     if (accel) {
   164         state->gl_accelerated=1;
   165     }
   166     if (!SDLTest_CommonInit(state)) {
   167         quit(2);
   168     }
   169 
   170     context = SDL_calloc(state->num_windows, sizeof(context));
   171     if (context == NULL) {
   172         fprintf(stderr, "Out of memory!\n");
   173         quit(2);
   174     }
   175 
   176     /* Create OpenGL ES contexts */
   177     for (i = 0; i < state->num_windows; i++) {
   178         context[i] = SDL_GL_CreateContext(state->windows[i]);
   179         if (!context[i]) {
   180             fprintf(stderr, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
   181             quit(2);
   182         }
   183     }
   184 
   185     if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
   186         SDL_GL_SetSwapInterval(1);
   187     } else {
   188         SDL_GL_SetSwapInterval(0);
   189     }
   190 
   191     SDL_GetCurrentDisplayMode(0, &mode);
   192     printf("Screen bpp: %d\n", SDL_BITSPERPIXEL(mode.format));
   193     printf("\n");
   194     printf("Vendor     : %s\n", glGetString(GL_VENDOR));
   195     printf("Renderer   : %s\n", glGetString(GL_RENDERER));
   196     printf("Version    : %s\n", glGetString(GL_VERSION));
   197     printf("Extensions : %s\n", glGetString(GL_EXTENSIONS));
   198     printf("\n");
   199 
   200     status = SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
   201     if (!status) {
   202         printf("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
   203     } else {
   204         fprintf(stderr, "Failed to get SDL_GL_RED_SIZE: %s\n",
   205                 SDL_GetError());
   206     }
   207     status = SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
   208     if (!status) {
   209         printf("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
   210     } else {
   211         fprintf(stderr, "Failed to get SDL_GL_GREEN_SIZE: %s\n",
   212                 SDL_GetError());
   213     }
   214     status = SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
   215     if (!status) {
   216         printf("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
   217     } else {
   218         fprintf(stderr, "Failed to get SDL_GL_BLUE_SIZE: %s\n",
   219                 SDL_GetError());
   220     }
   221     status = SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
   222     if (!status) {
   223         printf("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", depth, value);
   224     } else {
   225         fprintf(stderr, "Failed to get SDL_GL_DEPTH_SIZE: %s\n",
   226                 SDL_GetError());
   227     }
   228     if (fsaa) {
   229         status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
   230         if (!status) {
   231             printf("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
   232         } else {
   233             fprintf(stderr, "Failed to get SDL_GL_MULTISAMPLEBUFFERS: %s\n",
   234                     SDL_GetError());
   235         }
   236         status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
   237         if (!status) {
   238             printf("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa,
   239                    value);
   240         } else {
   241             fprintf(stderr, "Failed to get SDL_GL_MULTISAMPLESAMPLES: %s\n",
   242                     SDL_GetError());
   243         }
   244     }
   245     if (accel) {
   246         status = SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
   247         if (!status) {
   248             printf("SDL_GL_ACCELERATED_VISUAL: requested 1, got %d\n", value);
   249         } else {
   250             fprintf(stderr, "Failed to get SDL_GL_ACCELERATED_VISUAL: %s\n",
   251                     SDL_GetError());
   252         }
   253     }
   254 
   255     /* Set rendering settings for each context */
   256     for (i = 0; i < state->num_windows; ++i) {
   257         float aspectAdjust;
   258 
   259         status = SDL_GL_MakeCurrent(state->windows[i], context[i]);
   260         if (status) {
   261             printf("SDL_GL_MakeCurrent(): %s\n", SDL_GetError());
   262 
   263             /* Continue for next window */
   264             continue;
   265         }
   266 
   267         aspectAdjust = (4.0f / 3.0f) / ((float)state->window_w / state->window_h);
   268         glViewport(0, 0, state->window_w, state->window_h);
   269         glMatrixMode(GL_PROJECTION);
   270         glLoadIdentity();
   271         glOrthof(-2.0, 2.0, -2.0 * aspectAdjust, 2.0 * aspectAdjust, -20.0, 20.0);
   272         glMatrixMode(GL_MODELVIEW);
   273         glLoadIdentity();
   274         glEnable(GL_DEPTH_TEST);
   275         glDepthFunc(GL_LESS);
   276         glShadeModel(GL_SMOOTH);
   277     }
   278 
   279     /* Main render loop */
   280     frames = 0;
   281     then = SDL_GetTicks();
   282     done = 0;
   283     while (!done) {
   284         /* Check for events */
   285         ++frames;
   286         while (SDL_PollEvent(&event)) {
   287             switch (event.type) {
   288             case SDL_WINDOWEVENT:
   289                 switch (event.window.event) {
   290                     case SDL_WINDOWEVENT_RESIZED:
   291                         for (i = 0; i < state->num_windows; ++i) {
   292                             if (event.window.windowID == SDL_GetWindowID(state->windows[i])) {
   293                                 status = SDL_GL_MakeCurrent(state->windows[i], context[i]);
   294                                 if (status) {
   295                                     printf("SDL_GL_MakeCurrent(): %s\n", SDL_GetError());
   296                                     break;
   297                                 }
   298                                 /* Change view port to the new window dimensions */
   299                                 glViewport(0, 0, event.window.data1, event.window.data2);
   300                                 /* Update window content */
   301                                 Render();
   302                                 SDL_GL_SwapWindow(state->windows[i]);
   303                                 break;
   304                             }
   305                         }
   306                         break;
   307                 }
   308             }
   309             SDLTest_CommonEvent(state, &event, &done);
   310         }
   311         for (i = 0; i < state->num_windows; ++i) {
   312             status = SDL_GL_MakeCurrent(state->windows[i], context[i]);
   313             if (status) {
   314                 printf("SDL_GL_MakeCurrent(): %s\n", SDL_GetError());
   315 
   316                 /* Continue for next window */
   317                 continue;
   318             }
   319             Render();
   320             SDL_GL_SwapWindow(state->windows[i]);
   321         }
   322     }
   323 
   324     /* Print out some timing information */
   325     now = SDL_GetTicks();
   326     if (now > then) {
   327         printf("%2.2f frames per second\n",
   328                ((double) frames * 1000) / (now - then));
   329     }
   330     quit(0);
   331     return 0;
   332 }
   333 
   334 #else /* HAVE_OPENGLES */
   335 
   336 int
   337 main(int argc, char *argv[])
   338 {
   339     printf("No OpenGL ES support on this system\n");
   340     return 1;
   341 }
   342 
   343 #endif /* HAVE_OPENGLES */
   344 
   345 /* vi: set ts=4 sw=4 expandtab: */