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
  18
  19 import mnit # for
  20 # import opengles1
  21
  22 import sdl
  23
  24 in "C Header" `{
  25         #define LOGW(...) ((void)fprintf(stderr, "# warn: %s", __VA_ARGS__))
  26         #ifdef DEBUG
  27                 #define LOGI(...) ((void)fprintf(stderr, "# info: %s", __VA_ARGS__))
  28         #else
  29                 #define LOGI(...) (void)0
  30         #endif
  31 `}
  32
  33 in "C" `{
  34         NativeWindowType mnit_window;
  35         EGLNativeDisplayType mnit_native_display;
  36
  37         SDL_Surface* mnit_sdl_surface;
  38 `}
  39
  40 redef class Display
  41         fun wanted_width: Int do return 800
  42         fun wanted_height: Int do return 600
  43 end
  44
  45 redef class Opengles1Display # in "C" `{struct mnit_opengles_Texture *`}
  46
  47         # display managing the window, events, fonts? and image loading?
  48         var sdl_display: SDLDisplay
  49
  50         redef fun extern_init do
  51                 sdl_display = new SDLDisplay( wanted_width, wanted_height )
  52                 init_from_sdl( sdl_display )
  53                 return super
  54         end
  55
  56         fun init_from_sdl( sdl_display: SDLDisplay ): Bool is extern `{
  57                 mnit_sdl_surface = sdl_display;
  58
  59                 mnit_window = (NativeWindowType)XOpenDisplay(NULL);
  60                 mnit_native_display = (EGLNativeDisplayType)mnit_window;
  61
  62                 if (!mnit_window)
  63                 {
  64                         fprintf(stderr, "ERROR: unable to get display!n");
  65                         return 3;
  66                 }
  67
  68                 SDL_SysWMinfo mnit_sys_info;
  69                 SDL_VERSION(&mnit_sys_info.version);
  70                 if(SDL_GetWMInfo(&mnit_sys_info) <= 0)
  71                 {
  72                         printf("Unable to get window handle");
  73                         return 0;
  74                 }
  75
  76                 mnit_window = (EGLNativeWindowType)mnit_sys_info.info.x11.window;
  77
  78                 return 0;
  79         `}
  80
  81         redef fun close
  82         do
  83                 super
  84
  85                 sdl_display.destroy
  86         end
  87 end
  88
  89 redef extern Opengles1Image
  90         new from_sdl_image( sdl_image: SDLImage ) is extern `{
  91                 return mnit_opengles_load_image( sdl_image->pixels, sdl_image->w, sdl_image->h, sdl_image->format->Amask );
  92         `}
  93
  94         # using sdl
  95         new from_file( path: String ) is extern import String.to_cstring `{
  96                 SDL_Surface *sdl_image;
  97                 struct mnit_opengles_Texture *opengles_image;
  98
  99                 sdl_image = IMG_Load( String_to_cstring( path ) );
 100                 if ( !sdl_image ) {
 101                         LOGW( "SDL failed to load image <%s>: %s\n", String_to_cstring( path ), IMG_GetError() );
 102                         return NULL;
 103                 } else {
 104                         opengles_image = mnit_opengles_load_image( sdl_image->pixels, sdl_image->w, sdl_image->h, sdl_image->format->Amask );
 105                         SDL_FreeSurface(sdl_image);
 106                         return opengles_image;
 107                 }
 108         `}
 109 end