navit/navit/graphics/opengl/window.c

   1 #define USE_OPENGLES2 1
   2
   3 #if USE_OPENGLES2
   4 #include <GLES2/gl2.h>
   5 #include <EGL/egl.h>
   6 #else
   7 #include <GLES/gl.h>
   8 #include <GLES/egl.h>
   9 #endif
  10 #include <X11/Xlib.h>
  11 #include <X11/Xutil.h>
  12 #include "debug.h"
  13
  14 EGLSurface eglwindow;
  15 EGLDisplay egldisplay;
  16 Display *dpy;
  17 Window window;
  18
  19 #if USE_OPENGLES2
  20 static EGLint attributeList[] = {
  21         EGL_RED_SIZE, 8,
  22         EGL_GREEN_SIZE, 8,
  23         EGL_BLUE_SIZE, 8,
  24         EGL_DEPTH_SIZE, 16,
  25         EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  26         EGL_NONE
  27 };
  28
  29 #else
  30 static EGLint attributeList[] = {
  31         EGL_RED_SIZE, 1,
  32         EGL_DEPTH_SIZE, 1,
  33         EGL_NONE
  34 };
  35 #endif
  36
  37
  38 int
  39 createEGLWindow(int width, int height, char *name)
  40 {
  41         EGLConfig config[4];
  42         EGLContext cx;
  43         int nconfig;
  44         XSizeHints sizehints;
  45         XSetWindowAttributes swa;
  46         XVisualInfo *vi, tmp;
  47         int vid, n;
  48
  49 #if USE_OPENGLES2
  50         EGLint aEGLContextAttributes[] = {
  51                 EGL_CONTEXT_CLIENT_VERSION, 2,
  52                 EGL_NONE
  53         };
  54 #endif
  55
  56
  57         egldisplay = eglGetDisplay(dpy = XOpenDisplay(NULL));
  58         eglInitialize(egldisplay, 0, 0);
  59         if (!eglChooseConfig
  60             (egldisplay, attributeList, config,
  61              sizeof config / sizeof config[0], &nconfig)) {
  62                 dbg(0, "can't find requested config\n");
  63                 return 0;
  64         }
  65 #if USE_OPENGLES2
  66         cx = eglCreateContext(egldisplay, config[0], EGL_NO_CONTEXT, aEGLContextAttributes);
  67 #else
  68         cx = eglCreateContext(egldisplay, config[0], EGL_NO_CONTEXT, NULL);
  69 #endif
  70
  71         eglGetConfigAttrib(egldisplay, config[0], EGL_NATIVE_VISUAL_ID,
  72                            &vid);
  73         tmp.visualid = vid;
  74         vi = XGetVisualInfo(dpy, VisualIDMask, &tmp, &n);
  75         swa.colormap =
  76             XCreateColormap(dpy, RootWindow(dpy, vi->screen), vi->visual,
  77                             AllocNone);
  78         sizehints.flags = 0;
  79         sizehints.flags = PMinSize | PMaxSize;
  80         sizehints.min_width = sizehints.max_width = width;
  81         sizehints.min_height = sizehints.max_height = height;
  82
  83
  84         swa.border_pixel = 0;
  85         swa.event_mask =
  86             ExposureMask | StructureNotifyMask | KeyPressMask |
  87             ButtonPressMask | ButtonReleaseMask;
  88         window =
  89             XCreateWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, width,
  90                           height, 0, vi->depth, InputOutput, vi->visual,
  91                           CWBorderPixel | CWColormap | CWEventMask, &swa);
  92         XMapWindow(dpy, window);
  93         XSetStandardProperties(dpy, window, name, name, None, (void *) 0, 0, &sizehints);
  94
  95         eglwindow = eglCreateWindowSurface(egldisplay, config[0], (NativeWindowType) window, 0);
  96         eglMakeCurrent(egldisplay, eglwindow, eglwindow, cx);
  97         return 1;
  98 }