always try to load FBO extensions in case user enables r_fbo later

[d2df-sdl.git] / src / game / sdl2 / g_system.pas

diff --git a/src/game/sdl2/g_system.pas b/src/game/sdl2/g_system.pas
index 694042c37dea2db0f756e690b4d14a00f63f16e7..e4bd07046a8576bbecdc7763b13cbe282295e062 100644 (file)
--- a/src/game/sdl2/g_system.pas
+++ b/src/game/sdl2/g_system.pas
@@ -78,10 +78,17 @@ implementation
   begin
     gWinSizeX := w;
     gWinSizeY := h;
-    gScreenWidth := w;
-    gScreenHeight := h;
     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;
     {$IFDEF ENABLE_HOLMES}
       fuiScrWdt := w;
       fuiScrHgt := h;
@@ -150,8 +157,15 @@ implementation
         if context <> nil then
         begin
           {$IFDEF NOGL_INIT}
-            nogl_Init;
+          nogl_Init;
+          if (not nogl_ExtensionSupported('GL_OES_framebuffer_object')) and glRenderToFBO then
+          {$ELSE}
+          if (not Load_GL_ARB_framebuffer_object()) and glRenderToFBO then
           {$ENDIF}
+          begin
+            e_LogWriteln('SDL: no framebuffer object support detected');
+            glRenderToFBO := False
+          end;
           if (fullscreen = false) and (maximized = false) and (wc = false) then
           begin
             SDL_GetWindowPosition(window, @x, @y);
@@ -177,8 +191,12 @@ implementation
     end
     else
     begin
+      if fullScreen then flags := SDL_WINDOW_FULLSCREEN else flags := 0;
+      SDL_SetWindowFullscreen(window, flags);
       SDL_SetWindowSize(window, w, h);
-      if wc then
+      if maximized then SDL_MaximizeWindow(window);
+      // always reset to center when changing fullscreen->windowed for safety purposes
+      if wc or (gFullscreen and not fullscreen) or (gWinMaximized and not maximized) then
       begin
         x := SDL_WINDOWPOS_CENTERED;
         y := SDL_WINDOWPOS_CENTERED
@@ -194,10 +212,6 @@ implementation
         SDL_GetWindowPosition(window, @x, @y);
         wx := x; wy := y
       end;
-      if maximized then
-        SDL_MaximizeWindow(window);
-      if fullScreen then flags := SDL_WINDOW_FULLSCREEN else flags := 0;
-      SDL_SetWindowFullscreen(window, flags);
       gFullScreen := fullscreen;
       gWinMaximized := maximized;
       gRC_FullScreen := fullscreen;
@@ -209,6 +223,8 @@ implementation
 
   procedure sys_Repaint;
   begin
+    if glRenderToFBO then
+      e_BlitFramebuffer(gWinSizeX, gWinSizeY);
     SDL_GL_SwapWindow(window)
   end;