progs/egl/opengl/eglscreen.c

   1 /*
   2  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 /*
  23  * Stolen from eglgears
  24  *
  25  * Creates a surface and show that on the first screen
  26  */
  27
  28 #define EGL_EGLEXT_PROTOTYPES
  29
  30 #include <assert.h>
  31 #include <math.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <unistd.h>
  36 #include <GL/gl.h>
  37 #include <EGL/egl.h>
  38 #include <EGL/eglext.h>
  39
  40 #define MAX_CONFIGS 10
  41 #define MAX_MODES 100
  42
  43 int
  44 main(int argc, char *argv[])
  45 {
  46         int maj, min;
  47         EGLSurface screen_surf;
  48         EGLConfig configs[MAX_CONFIGS];
  49         EGLint numConfigs, i;
  50         EGLBoolean b;
  51         EGLDisplay d;
  52         EGLint screenAttribs[10];
  53         EGLModeMESA mode[MAX_MODES];
  54         EGLScreenMESA screen;
  55         EGLint count;
  56         EGLint chosenMode = 0;
  57         EGLint width = 0, height = 0;
  58
  59         d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
  60         assert(d);
  61
  62         if (!eglInitialize(d, &maj, &min)) {
  63                 printf("eglscreen: eglInitialize failed\n");
  64                 exit(1);
  65         }
  66
  67         printf("eglscreen: EGL version = %d.%d\n", maj, min);
  68         printf("eglscreen: EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
  69
  70         /* XXX use ChooseConfig */
  71         eglGetConfigs(d, configs, MAX_CONFIGS, &numConfigs);
  72         eglGetScreensMESA(d, &screen, 1, &count);
  73
  74         if (!eglGetModesMESA(d, screen, mode, MAX_MODES, &count) || count == 0) {
  75                 printf("eglscreen: eglGetModesMESA failed!\n");
  76                 return 0;
  77         }
  78
  79         /* Print list of modes, and find the one to use */
  80         printf("eglscreen: Found %d modes:\n", count);
  81         for (i = 0; i < count; i++) {
  82                 EGLint w, h;
  83                 eglGetModeAttribMESA(d, mode[i], EGL_WIDTH, &w);
  84                 eglGetModeAttribMESA(d, mode[i], EGL_HEIGHT, &h);
  85                 printf("%3d: %d x %d\n", i, w, h);
  86                 if (w > width && h > height) {
  87                         width = w;
  88                         height = h;
  89                         chosenMode = i;
  90                 }
  91         }
  92         printf("eglscreen: Using screen mode/size %d: %d x %d\n", chosenMode, width, height);
  93
  94         /* build up screenAttribs array */
  95         i = 0;
  96         screenAttribs[i++] = EGL_WIDTH;
  97         screenAttribs[i++] = width;
  98         screenAttribs[i++] = EGL_HEIGHT;
  99         screenAttribs[i++] = height;
 100         screenAttribs[i++] = EGL_NONE;
 101
 102         screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
 103         if (screen_surf == EGL_NO_SURFACE) {
 104                 printf("eglscreen: Failed to create screen surface\n");
 105                 return 0;
 106         }
 107
 108         b = eglShowScreenSurfaceMESA(d, screen, screen_surf, mode[chosenMode]);
 109         if (!b) {
 110                 printf("eglscreen: Show surface failed\n");
 111                 return 0;
 112         }
 113
 114         usleep(5000000);
 115
 116         eglDestroySurface(d, screen_surf);
 117         eglTerminate(d);
 118
 119         return 0;
 120 }