1 # This file is part of NIT (http://www.nitlanguage.org).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # Gamnit display implementation for GNU/Linux using `egl`, `sdl` and `x11`
21 import egl
# local to gamnit
24 redef class GamnitDisplay
26 # Actual width or desired width of the window, can be set before calling `setup`
27 fun width
=(value
: Int) do requested_width
= value
28 private var requested_width
= 1920
30 # Actual height or desired height of the window, can be set before calling `setup`
31 fun height
=(value
: Int) do requested_height
= value
32 private var requested_height
= 1080
34 # Setup SDL, X11, EGL in order
37 if debug_gamnit
then print
"Setting up SDL"
38 self.sdl_display
= setup_sdl
(requested_width
, requested_height
)
40 if debug_gamnit
then print
"Setting up X11"
41 var x11_display
= setup_x11
42 var window_handle
= window_handle
43 setup_egl_display x11_display
45 if debug_gamnit
then print
"Setting up EGL context"
46 select_egl_config
(8, 8, 8, 8, 8, 0, 0)
47 setup_egl_context window_handle
50 # Close EGL and SDL in reverse order of `setup` (nothing to do for X11)
60 # The SDL display managing the window and events
61 var sdl_display
: SDLDisplay is noautoinit
63 # Setup the SDL display and lib
64 fun setup_sdl
(window_width
, window_height
: Int): SDLDisplay
66 var sdl_display
= new SDLDisplay(window_width
, window_height
)
67 assert not sdl_display
.address_is_null
else print
"Opening SDL display failed"
71 # Close the SDL display
72 fun close_sdl
do sdl_display
.destroy
74 # Get a native handle to the current SDL window
75 fun window_handle
: Pointer
77 var sdl_wm_info
= new SDLSystemWindowManagerInfo
78 return sdl_wm_info
.x11_window_handle
84 # Get a native handle to the current X11 display
85 fun setup_x11
: Pointer
87 var x11_display
= x_open_default_display
88 assert not x11_display
.address_is_null
else print
"Opening X11 display failed"