lib/mnit_linux/linux_opengles1.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2011-2013 Alexis Laferrière <alexis.laf@xymus.net>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 module linux_opengles1 is pkgconfig("x11")
  18
  19 import mnit::opengles1
  20
  21 import sdl
  22
  23 in "C" `{
  24         NativeWindowType mnit_window;
  25         EGLNativeDisplayType mnit_native_display;
  26
  27         SDL_Surface* mnit_sdl_surface;
  28 `}
  29
  30 redef class Display
  31         fun wanted_width: Int do return 800
  32         fun wanted_height: Int do return 600
  33 end
  34
  35 redef class Opengles1Display
  36
  37         # display managing the window, events, fonts? and image loading?
  38         var sdl_display: SDLDisplay
  39
  40         redef fun extern_init do
  41                 sdl_display = new SDLDisplay( wanted_width, wanted_height )
  42                 init_from_sdl( sdl_display )
  43                 return super
  44         end
  45
  46         fun init_from_sdl( sdl_display: SDLDisplay ): Bool is extern `{
  47                 mnit_sdl_surface = sdl_display;
  48
  49                 mnit_window = (NativeWindowType)XOpenDisplay(NULL);
  50                 mnit_native_display = (EGLNativeDisplayType)mnit_window;
  51
  52                 if (!mnit_window)
  53                 {
  54                         fprintf(stderr, "ERROR: unable to get display!n");
  55                         return 3;
  56                 }
  57
  58                 SDL_SysWMinfo mnit_sys_info;
  59                 SDL_VERSION(&mnit_sys_info.version);
  60                 if(SDL_GetWMInfo(&mnit_sys_info) <= 0)
  61                 {
  62                         printf("Unable to get window handle");
  63                         return 0;
  64                 }
  65
  66                 mnit_window = (EGLNativeWindowType)mnit_sys_info.info.x11.window;
  67
  68                 return 0;
  69         `}
  70
  71         redef fun close
  72         do
  73                 super
  74
  75                 sdl_display.destroy
  76         end
  77 end
  78
  79 redef extern class Opengles1Image
  80         new from_sdl_image( sdl_image: SDLImage ) is extern `{
  81                 return mnit_opengles_load_image( sdl_image->pixels,
  82                         sdl_image->w, sdl_image->h,
  83                         sdl_image->w, sdl_image->h, sdl_image->format->Amask );
  84         `}
  85
  86         # using sdl
  87         new from_file( path: String ) is extern import String.to_cstring `{
  88                 SDL_Surface *sdl_image;
  89                 struct mnit_opengles_Texture *opengles_image;
  90
  91                 sdl_image = IMG_Load( String_to_cstring( path ) );
  92                 if ( !sdl_image ) {
  93                         fprintf(stderr, "SDL failed to load image <%s>: %s\n", String_to_cstring(path), IMG_GetError());
  94                         return NULL;
  95                 } else {
  96                         opengles_image = mnit_opengles_load_image( sdl_image->pixels,
  97                                 sdl_image->w, sdl_image->h,
  98                                 sdl_image->w, sdl_image->h, sdl_image->format->Amask );
  99                         SDL_FreeSurface(sdl_image);
 100                         return opengles_image;
 101                 }
 102         `}
 103 end