src/egl/demo1.c

   1 /*
   2  * Exercise EGL API functions
   3  */
   4
   5 #include <GLES/egl.h>
   6 #include <assert.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11
  12 /**
  13  * Test EGL_MESA_screen_surface functions
  14  */
  15 static void
  16 TestScreens(EGLDisplay dpy)
  17 {
  18 #define MAX 8
  19    EGLScreenMESA screens[MAX];
  20    EGLint numScreens;
  21    EGLint i;
  22
  23    eglGetScreensMESA(dpy, screens, MAX, &numScreens);
  24    printf("Found %d screens\n", numScreens);
  25    for (i = 0; i < numScreens; i++) {
  26       printf(" Screen %d handle: %d\n", i, (int) screens[i]);
  27    }
  28 }
  29
  30 /**
  31  * Print table of all available configurations.
  32  */
  33 static void
  34 PrintConfigs(EGLDisplay d)
  35 {
  36    EGLConfig *configs;
  37    EGLint numConfigs, i;
  38
  39    eglGetConfigs(d, NULL, 0, &numConfigs);
  40    configs = malloc(sizeof(*configs) *numConfigs);
  41    eglGetConfigs(d, configs, numConfigs, &numConfigs);
  42
  43    printf("Configurations:\n");
  44    printf("     bf lv d st colorbuffer dp st   supported \n");
  45    printf("  id sz  l b ro  r  g  b  a th cl   surfaces  \n");
  46    printf("----------------------------------------------\n");
  47    for (i = 0; i < numConfigs; i++) {
  48       EGLint id, size, level;
  49       EGLint red, green, blue, alpha;
  50       EGLint depth, stencil;
  51       EGLint surfaces;
  52       EGLint doubleBuf = 1, stereo = 0;
  53       char surfString[100] = "";
  54
  55       eglGetConfigAttrib(d, configs[i], EGL_CONFIG_ID, &id);
  56       eglGetConfigAttrib(d, configs[i], EGL_BUFFER_SIZE, &size);
  57       eglGetConfigAttrib(d, configs[i], EGL_LEVEL, &level);
  58
  59       eglGetConfigAttrib(d, configs[i], EGL_RED_SIZE, &red);
  60       eglGetConfigAttrib(d, configs[i], EGL_GREEN_SIZE, &green);
  61       eglGetConfigAttrib(d, configs[i], EGL_BLUE_SIZE, &blue);
  62       eglGetConfigAttrib(d, configs[i], EGL_ALPHA_SIZE, &alpha);
  63       eglGetConfigAttrib(d, configs[i], EGL_DEPTH_SIZE, &depth);
  64       eglGetConfigAttrib(d, configs[i], EGL_STENCIL_SIZE, &stencil);
  65       eglGetConfigAttrib(d, configs[i], EGL_SURFACE_TYPE, &surfaces);
  66
  67       if (surfaces & EGL_WINDOW_BIT)
  68          strcat(surfString, "win,");
  69       if (surfaces & EGL_PBUFFER_BIT)
  70          strcat(surfString, "pb,");
  71       if (surfaces & EGL_PIXMAP_BIT)
  72          strcat(surfString, "pix,");
  73       if (strlen(surfString) > 0)
  74          surfString[strlen(surfString) - 1] = 0;
  75
  76       printf("0x%02x %2d %2d %c  %c %2d %2d %2d %2d %2d %2d   %-12s\n",
  77              id, size, level,
  78              doubleBuf ? 'y' : '.',
  79              stereo ? 'y' : '.',
  80              red, green, blue, alpha,
  81              depth, stencil, surfString);
  82    }
  83    free(configs);
  84 }
  85
  86
  87
  88 int
  89 main(int argc, char *argv[])
  90 {
  91    int maj, min;
  92    EGLContext ctx;
  93    EGLSurface pbuffer;
  94    EGLConfig configs[10];
  95    EGLBoolean b;
  96    const EGLint pbufAttribs[] = {
  97       EGL_WIDTH, 500,
  98       EGL_HEIGHT, 500,
  99       EGL_NONE
 100    };
 101
 102    /*
 103    EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 104    */
 105    EGLDisplay d = eglGetDisplay("!fb_dri");
 106    assert(d);
 107
 108    if (!eglInitialize(d, &maj, &min)) {
 109       printf("demo: eglInitialize failed\n");
 110       exit(1);
 111    }
 112
 113    printf("EGL version = %d.%d\n", maj, min);
 114    printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
 115
 116    PrintConfigs(d);
 117
 118    ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL);
 119    if (ctx == EGL_NO_CONTEXT) {
 120       printf("failed to create context\n");
 121       return 0;
 122    }
 123
 124    pbuffer = eglCreatePbufferSurface(d, configs[0], pbufAttribs);
 125    if (pbuffer == EGL_NO_SURFACE) {
 126       printf("failed to create pbuffer\n");
 127       return 0;
 128    }
 129
 130    b = eglMakeCurrent(d, pbuffer, pbuffer, ctx);
 131    if (!b) {
 132       printf("make current failed\n");
 133       return 0;
 134    }
 135
 136    b = eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 137
 138    TestScreens(d);
 139
 140    eglDestroySurface(d, pbuffer);
 141    eglDestroyContext(d, ctx);
 142    eglTerminate(d);
 143
 144    return 0;
 145 }