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
  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   end;
  81
  82   procedure r_Render_Free;
  83   begin
  84     r_Items_Free;
  85     r_Weapon_Free;
  86   end;
  87
  88   procedure r_Render_Initialize;
  89   begin
  90     if sys_SetDisplayMode(gRC_Width, gRC_Height, gBPP, gRC_FullScreen, gRC_Maximized) = False then
  91       raise Exception.Create('Failed to set videomode on startup.');
  92     LoadGL;
  93     r_Window_Initialize;
  94     r_Console_Init;
  95     r_PlayerModel_Initialize;
  96   end;
  97
  98   procedure r_Render_Finalize;
  99   begin
 100     FreeGL;
 101     r_PlayerModel_Finalize;
 102     e_ReleaseEngine
 103   end;
 104
 105   procedure r_Render_Resize (w, h: Integer);
 106   begin
 107     LoadGL;
 108     gWinSizeX := w;
 109     gWinSizeY := h;
 110     gRC_Width := w;
 111     gRC_Height := h;
 112     if glRenderToFBO then
 113     begin
 114       // store real window size in gWinSize, downscale resolution now
 115       w := round(w / r_pixel_scale);
 116       h := round(h / r_pixel_scale);
 117       if not e_ResizeFramebuffer(w, h) then
 118       begin
 119         e_LogWriteln('GL: could not create framebuffer, falling back to --no-fbo');
 120         glRenderToFBO := False;
 121         w := gWinSizeX;
 122         h := gWinSizeY;
 123       end;
 124     end;
 125     gScreenWidth := w;
 126     gScreenHeight := h;
 127     e_ResizeWindow(w, h);
 128     e_InitGL
 129   end;
 130
 131   procedure r_Render_Apply;
 132   begin
 133     if sys_SetDisplayMode(Max(1, gRC_Width), Max(1, gRC_Height), Max(1, gBPP), gRC_FullScreen, gRC_Maximized) then
 134       e_LogWriteln('resolution changed')
 135     else
 136       e_LogWriteln('resolution not changed');
 137     sys_EnableVSync(gVSync)
 138   end;
 139
 140 end.