src/game/opengl/r_render.pas

   1 (* Copyright (C)  Doom 2D: Forever Developers
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, version 3 of the License ONLY.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  *)
  15 {$INCLUDE ../../shared/a_modes.inc}
  16 unit r_render;
  17
  18 interface
  19
  20   procedure r_Render_Initialize;
  21   procedure r_Render_Finalize;
  22   procedure r_Render_Resize (w, h: Integer);
  23
  24   procedure r_Render_Load;
  25   procedure r_Render_Free;
  26
  27   procedure r_Render_Apply;
  28
  29 implementation
  30
  31   uses
  32     {$INCLUDE ../../nogl/noGLuses.inc}
  33     SysUtils, Classes, Math,
  34     e_log, g_system,
  35     g_game, g_options, g_console,
  36     r_window, r_graphics, r_console, r_playermodel,
  37     r_weapons, r_items, r_gfx
  38   ;
  39
  40   var
  41     LoadedGL: Boolean = false;
  42
  43   procedure LoadGL;
  44   begin
  45     if LoadedGL = false then
  46     begin
  47       {$IFDEF NOGL_INIT}
  48         nogl_Init;
  49         if glRenderToFBO and (not nogl_ExtensionSupported('GL_OES_framebuffer_object')) then
  50         begin
  51           e_LogWriteln('GL: framebuffer objects not supported; disabling FBO rendering');
  52           glRenderToFBO := false
  53         end;
  54       {$ELSE}
  55         if glRenderToFBO and (not Load_GL_ARB_framebuffer_object) then
  56         begin
  57           e_LogWriteln('GL: framebuffer objects not supported; disabling FBO rendering');
  58           glRenderToFBO := false
  59         end;
  60       {$ENDIF}
  61       LoadedGL := true
  62     end
  63   end;
  64
  65   procedure FreeGL;
  66   begin
  67     if LoadedGL = true then
  68     begin
  69       {$IFDEF NOGL_INIT}
  70         nogl_Quit;
  71       {$ENDIF}
  72       LoadedGL := false
  73     end
  74   end;
  75
  76   procedure r_Render_Load;
  77   begin
  78     r_Weapon_Load;
  79     r_Items_Load;
  80     r_GFX_Load;
  81   end;
  82
  83   procedure r_Render_Free;
  84   begin
  85     r_GFX_Free;
  86     r_Items_Free;
  87     r_Weapon_Free;
  88   end;
  89
  90   procedure r_Render_Initialize;
  91   begin
  92     if sys_SetDisplayMode(gRC_Width, gRC_Height, gBPP, gRC_FullScreen, gRC_Maximized) = False then
  93       raise Exception.Create('Failed to set videomode on startup.');
  94     LoadGL;
  95     r_Window_Initialize;
  96     r_Console_Init;
  97     r_PlayerModel_Initialize;
  98   end;
  99
 100   procedure r_Render_Finalize;
 101   begin
 102     FreeGL;
 103     r_PlayerModel_Finalize;
 104     e_ReleaseEngine
 105   end;
 106
 107   procedure r_Render_Resize (w, h: Integer);
 108   begin
 109     LoadGL;
 110     gWinSizeX := w;
 111     gWinSizeY := h;
 112     gRC_Width := w;
 113     gRC_Height := h;
 114     if glRenderToFBO then
 115     begin
 116       // store real window size in gWinSize, downscale resolution now
 117       w := round(w / r_pixel_scale);
 118       h := round(h / r_pixel_scale);
 119       if not e_ResizeFramebuffer(w, h) then
 120       begin
 121         e_LogWriteln('GL: could not create framebuffer, falling back to --no-fbo');
 122         glRenderToFBO := False;
 123         w := gWinSizeX;
 124         h := gWinSizeY;
 125       end;
 126     end;
 127     gScreenWidth := w;
 128     gScreenHeight := h;
 129     e_ResizeWindow(w, h);
 130     e_InitGL
 131   end;
 132
 133   procedure r_Render_Apply;
 134   begin
 135     if sys_SetDisplayMode(Max(1, gRC_Width), Max(1, gRC_Height), Max(1, gBPP), gRC_FullScreen, gRC_Maximized) then
 136       e_LogWriteln('resolution changed')
 137     else
 138       e_LogWriteln('resolution not changed');
 139     sys_EnableVSync(gVSync)
 140   end;
 141
 142 end.