#!/usr/bin/env python
from ctypes import *
from time import *
width=320
height=200
name=c_char_p("pyGLES window")
#gles = CDLL("libGLES_CL.so") # <--- this will need changing this is the desktop software reference driver library
gles = CDLL("libGLES_CM.so")
xlib = CDLL("libX11.so")
GL_DEPTH_BUFFER_BIT = 0x00000100
GL_STENCIL_BUFFER_BIT = 0x00000400
GL_COLOR_BUFFER_BIT = 0x00004000
EGL_RED_SIZE = 0x3024
EGL_DEPTH_SIZE = 0x3025
EGL_NONE = 0x3038
EGL_FALSE = 0
EGL_TRUE = 1
EGL_NATIVE_VISUAL_ID = 0x302E
VisualIDMask = 0x1
AllocNone = 0
PMinSize = 8
PMaxSize = 16
ExposureMask = 1<<15
StructureNotifyMask = 1<<17
KeyPressMask = 1<<0
ButtonPressMask = 1<<2
ButtonReleaseMask = 1<<3
InputOutput = 1
CWBorderPixel = 1<<3
CWColormap = 1<<13
CWEventMask = 1<<11
class XVisualInfo(Structure):
_fields_ = [
("visual", POINTER(c_long)),
("visualid", c_long),
("screen", c_int),
("depth", c_uint),
("class", c_int),
("red_mask", c_ulong),
("green_mask", c_ulong),
("blue_mask", c_ulong),
("colormap_size", c_int),
("bits_per_rpg", c_int)
]
class XSetWindowAttributes(Structure):
_fields_ = [
("background_pixmap", c_ulong),
("background_pixel", c_ulong),
("border_pixmap", c_ulong),
("border_pixel", c_ulong),
("bit_gravity", c_int),
("win_gravity", c_int),
("backing_store", c_int),
("backing_planes", c_ulong),
("backing_pixel", c_ulong),
("save_under", c_int),
("event_mask", c_long),
("do_not_propagate_mask", c_long),
("override_redirect", c_int),
("colormap", c_ulong),
("cursor", c_ulong)
]
class XSizeHints(Structure):
_fields_ = [("flags",c_long),
("x",c_int), # Obsolete
("y",c_int), # Obsolete
("width",c_int), # Obsolete
("height",c_int), # Obsolete
("min_width",c_int),
("min_height",c_int),
("max_width",c_int),
("max_height",c_int),
("width_inc",c_int),
("height_inc",c_int),
("min_asp_width",c_int),
("min_asp_height",c_int),
("max_asp_width",c_int),
("max_asp_height",c_int),
("base_width",c_int),
("base_height",c_int),
("win_gravity",c_int)]
dpy = xlib.XOpenDisplay(0)
egldisplay = gles.eglGetDisplay(dpy);
gles.eglInitialize(egldisplay, 0, 0)
attributeList = (c_int * 5)(EGL_RED_SIZE, 1, EGL_DEPTH_SIZE, 1, EGL_NONE)
config = (c_int * 4)(0,0,0,0)
nconf = c_int(0)
r=gles.eglChooseConfig(egldisplay,attributeList,config,4,pointer(nconf))
if r!=EGL_TRUE:
print "can't find requested config"
exit()
cx = gles.eglCreateContext(egldisplay, config[0], 0, 0);
vid=c_int(0)
gles.eglGetConfigAttrib(egldisplay, config[0], EGL_NATIVE_VISUAL_ID, pointer(vid))
vi=XVisualInfo()
tmp=XVisualInfo()
tmp.visualid = vid
n=c_int(0)
vi = XVisualInfo(cast(xlib.XGetVisualInfo(dpy, VisualIDMask, pointer(tmp), pointer(n)),POINTER(c_long)))
swa=XSetWindowAttributes()
rw=xlib.XDefaultRootWindow(dpy)
swa.colormap = xlib.XCreateColormap(dpy, rw, vi.visual, AllocNone);
sizehints=XSizeHints()
sizehints.flags = 0;
sizehints.flags = PMinSize | PMaxSize;
sizehints.min_width = sizehints.max_width = width;
sizehints.min_height = sizehints.max_height = height;
swa.border_pixel = 0;
swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask | ButtonPressMask | ButtonReleaseMask;
window = xlib.XCreateWindow(dpy, rw, 0, 0, width, height,
0, vi.depth, InputOutput, vi.visual,
CWBorderPixel|CWColormap|CWEventMask, pointer(swa));
xlib.XSetStandardProperties(dpy, window, name, name, 0, 0, 0, pointer(sizehints));
xlib.XMapWindow(dpy, window)
eglwindow = gles.eglCreateWindowSurface(egldisplay, config[0], window, 0)
gles.eglMakeCurrent(egldisplay, eglwindow, eglwindow, cx)
gles.glClearColorx(32768, 32768, 32768, 0)
gles.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
gles.eglSwapBuffers(egldisplay, eglwindow)
sleep(1)
