progs/egl/demo1.c

   1 /*
   2  * Exercise EGL API functions
   3  */
   4
   5 #define EGL_EGLEXT_PROTOTYPES
   6
   7 #include <EGL/egl.h>
   8 #include <EGL/eglext.h>
   9 #include <assert.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14
  15 /**
  16  * Test EGL_MESA_screen_surface functions
  17  */
  18 static void
  19 TestScreens(EGLDisplay dpy)
  20 {
  21 #define MAX 8
  22    EGLScreenMESA screens[MAX];
  23    EGLint numScreens;
  24    EGLint i;
  25
  26    eglGetScreensMESA(dpy, screens, MAX, &numScreens);
  27    printf("Found %d screens\n", numScreens);
  28    for (i = 0; i < numScreens; i++) {
  29       printf(" Screen %d handle: %d\n", i, (int) screens[i]);
  30    }
  31 }
  32
  33 /**
  34  * Print table of all available configurations.
  35  */
  36 static void
  37 PrintConfigs(EGLDisplay d, EGLConfig *configs, EGLint numConfigs)
  38 {
  39    EGLint i;
  40
  41    printf("Configurations:\n");
  42    printf("     bf lv d st colorbuffer dp st   supported \n");
  43    printf("  id sz  l b ro  r  g  b  a th cl   surfaces  \n");
  44    printf("----------------------------------------------\n");
  45    for (i = 0; i < numConfigs; i++) {
  46       EGLint id, size, level;
  47       EGLint red, green, blue, alpha;
  48       EGLint depth, stencil;
  49       EGLint surfaces;
  50       EGLint doubleBuf = 1, stereo = 0;
  51       char surfString[100] = "";
  52
  53       eglGetConfigAttrib(d, configs[i], EGL_CONFIG_ID, &id);
  54       eglGetConfigAttrib(d, configs[i], EGL_BUFFER_SIZE, &size);
  55       eglGetConfigAttrib(d, configs[i], EGL_LEVEL, &level);
  56
  57       eglGetConfigAttrib(d, configs[i], EGL_RED_SIZE, &red);
  58       eglGetConfigAttrib(d, configs[i], EGL_GREEN_SIZE, &green);
  59       eglGetConfigAttrib(d, configs[i], EGL_BLUE_SIZE, &blue);
  60       eglGetConfigAttrib(d, configs[i], EGL_ALPHA_SIZE, &alpha);
  61       eglGetConfigAttrib(d, configs[i], EGL_DEPTH_SIZE, &depth);
  62       eglGetConfigAttrib(d, configs[i], EGL_STENCIL_SIZE, &stencil);
  63       eglGetConfigAttrib(d, configs[i], EGL_SURFACE_TYPE, &surfaces);
  64
  65       if (surfaces & EGL_WINDOW_BIT)
  66          strcat(surfString, "win,");
  67       if (surfaces & EGL_PBUFFER_BIT)
  68          strcat(surfString, "pb,");
  69       if (surfaces & EGL_PIXMAP_BIT)
  70          strcat(surfString, "pix,");
  71       if (strlen(surfString) > 0)
  72          surfString[strlen(surfString) - 1] = 0;
  73
  74       printf("0x%02x %2d %2d %c  %c %2d %2d %2d %2d %2d %2d   %-12s\n",
  75              id, size, level,
  76              doubleBuf ? 'y' : '.',
  77              stereo ? 'y' : '.',
  78              red, green, blue, alpha,
  79              depth, stencil, surfString);
  80    }
  81 }
  82
  83
  84
  85 int
  86 main(int argc, char *argv[])
  87 {
  88    int maj, min;
  89    EGLContext ctx;
  90    EGLSurface pbuffer;
  91    EGLConfig *configs;
  92    EGLint numConfigs;
  93    EGLBoolean b;
  94    const EGLint pbufAttribs[] = {
  95       EGL_WIDTH, 500,
  96       EGL_HEIGHT, 500,
  97       EGL_NONE
  98    };
  99
 100    EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 101    assert(d);
 102
 103    if (!eglInitialize(d, &maj, &min)) {
 104       printf("demo: eglInitialize failed\n");
 105       exit(1);
 106    }
 107
 108    printf("EGL version = %d.%d\n", maj, min);
 109    printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
 110
 111    eglGetConfigs(d, NULL, 0, &numConfigs);
 112    configs = malloc(sizeof(*configs) *numConfigs);
 113    eglGetConfigs(d, configs, numConfigs, &numConfigs);
 114
 115    PrintConfigs(d, configs, numConfigs);
 116
 117    eglBindAPI(EGL_OPENGL_API);
 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    free(configs);
 131
 132    b = eglMakeCurrent(d, pbuffer, pbuffer, ctx);
 133    if (!b) {
 134       printf("make current failed\n");
 135       return 0;
 136    }
 137
 138    b = eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 139
 140    TestScreens(d);
 141
 142    eglDestroySurface(d, pbuffer);
 143    eglDestroyContext(d, ctx);
 144    eglTerminate(d);
 145
 146    return 0;
 147 }