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
  18         pkgconfig("glesv1_cm", "x11", "egl")
  19         c_compiler_option(exec("sdl-config", "--cflags"))
  20         c_linker_option(exec("sdl-config", "--libs"), "-lSDL_image -lSDL_ttf")
  21 end
  22
  23 import mnit # for
  24 # import opengles1
  25
  26 import sdl
  27
  28 in "C" `{
  29         NativeWindowType mnit_window;
  30         EGLNativeDisplayType mnit_native_display;
  31
  32         SDL_Surface* mnit_sdl_surface;
  33 `}
  34
  35 redef class Display
  36         fun wanted_width: Int do return 800
  37         fun wanted_height: Int do return 600
  38 end
  39
  40 redef class Opengles1Display
  41
  42         # display managing the window, events, fonts? and image loading?
  43         var sdl_display: SDLDisplay
  44
  45         redef fun extern_init do
  46                 sdl_display = new SDLDisplay( wanted_width, wanted_height )
  47                 init_from_sdl( sdl_display )
  48                 return super
  49         end
  50
  51         fun init_from_sdl( sdl_display: SDLDisplay ): Bool is extern `{
  52                 mnit_sdl_surface = sdl_display;
  53
  54                 mnit_window = (NativeWindowType)XOpenDisplay(NULL);
  55                 mnit_native_display = (EGLNativeDisplayType)mnit_window;
  56
  57                 if (!mnit_window)
  58                 {
  59                         fprintf(stderr, "ERROR: unable to get display!n");
  60                         return 3;
  61                 }
  62
  63                 SDL_SysWMinfo mnit_sys_info;
  64                 SDL_VERSION(&mnit_sys_info.version);
  65                 if(SDL_GetWMInfo(&mnit_sys_info) <= 0)
  66                 {
  67                         printf("Unable to get window handle");
  68                         return 0;
  69                 }
  70
  71                 mnit_window = (EGLNativeWindowType)mnit_sys_info.info.x11.window;
  72
  73                 return 0;
  74         `}
  75
  76         redef fun close
  77         do
  78                 super
  79
  80                 sdl_display.destroy
  81         end
  82 end
  83
  84 redef extern Opengles1Image
  85         new from_sdl_image( sdl_image: SDLImage ) is extern `{
  86                 return mnit_opengles_load_image( sdl_image->pixels, sdl_image->w, sdl_image->h, sdl_image->format->Amask );
  87         `}
  88
  89         # using sdl
  90         new from_file( path: String ) is extern import String.to_cstring `{
  91                 SDL_Surface *sdl_image;
  92                 struct mnit_opengles_Texture *opengles_image;
  93
  94                 sdl_image = IMG_Load( String_to_cstring( path ) );
  95                 if ( !sdl_image ) {
  96                         fprintf(stderr, "SDL failed to load image <%s>: %s\n", String_to_cstring(path), IMG_GetError());
  97                         return NULL;
  98                 } else {
  99                         opengles_image = mnit_opengles_load_image( sdl_image->pixels, sdl_image->w, sdl_image->h, sdl_image->format->Amask );
 100                         SDL_FreeSurface(sdl_image);
 101                         return opengles_image;
 102                 }
 103         `}
 104 end