added optional framebuffer and resolution scaling

[d2df-sdl.git] / src / game / sdl / g_system.pas

diff --git a/src/game/sdl/g_system.pas b/src/game/sdl/g_system.pas
index 4cb69f90349c26ac449f029ded27ff3e30303747..e5f62750ea6b0ca2c993025d4f7ab23125eb1d35 100644 (file)
--- a/src/game/sdl/g_system.pas
+++ b/src/game/sdl/g_system.pas
@@ -25,7 +25,7 @@ interface
 
   (* --- Graphics --- *)
   function sys_GetDisplayModes (bpp: Integer): SSArray;
-  function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen: Boolean): Boolean;
+  function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen, maximized: Boolean): Boolean;
   procedure sys_EnableVSync (yes: Boolean);
   procedure sys_Repaint;
 
@@ -43,10 +43,10 @@ implementation
     SysUtils, SDL, Math,
     {$INCLUDE ../nogl/noGLuses.inc}
     e_log, e_graphics, e_input, e_sound,
-    g_options, g_window, g_console, g_game, g_menu, g_gui, g_main;
+    g_options, g_window, g_console, g_game, g_menu, g_gui, g_main, g_basic;
 
   const
-    GameTitle = 'Doom 2D: Forever (SDL 1.2)';
+    GameTitle = 'Doom 2D: Forever (SDL 1.2, %s)';
 
   var
     userResize: Boolean;
@@ -74,8 +74,15 @@ implementation
   begin
     gWinSizeX := w;
     gWinSizeY := h;
-    gWinRealPosX := 0;
-    gWinRealPosY := 0;
+    gRC_Width := w;
+    gRC_Height := h;
+    if glRenderToFBO then
+    begin
+      // store real window size in gWinSize, downscale resolution now
+      w := round(w / r_pixel_scale);
+      h := round(h / r_pixel_scale);
+      e_ResizeFramebuffer(w, h);
+    end;
     gScreenWidth := w;
     gScreenHeight := h;
     {$IFDEF ENABLE_HOLMES}
@@ -89,11 +96,20 @@ implementation
     g_Game_ClearLoading;
   end;
 
+  function GetTitle (): PChar;
+    var info: AnsiString;
+  begin
+    info := g_GetBuildHash(false);
+    if info = 'custom build' then
+      info := info + ' by ' + g_GetBuilderName() + ' ' + GAME_BUILDDATE + ' ' + GAME_BUILDTIME;
+    result := PChar(Format(GameTitle, [info]))
+  end;
+
   function InitWindow (w, h, bpp: Integer; fullScreen: Boolean): Boolean;
     var flags: Uint32;
   begin
     e_LogWritefln('InitWindow %s %s %s %s', [w, h, bpp, fullScreen]);
-    result := False;
+    result := false;
     SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
     SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
     SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
@@ -111,8 +127,19 @@ implementation
       begin
         {$IFDEF NOGL_INIT}
           nogl_Init;
+          glRenderToFBO := False; // TODO: check for GL_OES_framebuffer_object
+        {$ELSE}
+          if glRenderToFBO then
+            if not Load_GL_ARB_framebuffer_object() then
+              if not Load_GL_EXT_framebuffer_object() then
+              begin
+                e_LogWriteln('SDL: no framebuffer support detected');
+                glRenderToFBO := False
+              end;
         {$ENDIF}
-        SDL_WM_SetCaption(GameTitle, nil);
+        SDL_WM_SetCaption(GetTitle(), nil);
+        gFullScreen := fullscreen;
+        gRC_FullScreen := fullscreen;
         UpdateSize(w, h);
         result := True
       end
@@ -125,6 +152,8 @@ implementation
 
   procedure sys_Repaint;
   begin
+    if glRenderToFBO then
+      e_BlitFramebuffer(gWinSizeX, gWinSizeY);
     SDL_GL_SwapBuffers
   end;
 
@@ -152,7 +181,7 @@ implementation
     end
   end;
 
-  function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen: Boolean): Boolean;
+  function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen, maximized: Boolean): Boolean;
   begin
     result := InitWindow(w, h, bpp, fullscreen)
   end;