added optional framebuffer and resolution scaling

diff --git a/src/engine/e_graphics.pas b/src/engine/e_graphics.pas
index 6e8966eaf5628467df56d3dc145d29f22f05193b..18f75c44ea3263119bd6bfbb429a614c05060e09 100644 (file)
--- a/src/engine/e_graphics.pas
+++ b/src/engine/e_graphics.pas
@@ -62,6 +62,8 @@ type
 procedure e_InitGL();
 procedure e_SetViewPort(X, Y, Width, Height: Word);
 procedure e_ResizeWindow(Width, Height: Integer);
+procedure e_ResizeFramebuffer(Width, Height: Integer);
+procedure e_BlitFramebuffer(WinWidth, WinHeight: Integer);
 
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
                  Blending: Boolean; Mirror: TMirrorType = TMirrorType.None);
@@ -151,6 +153,7 @@ var
   e_NoGraphics: Boolean = False;
   e_FastScreenshots: Boolean = true; // it's REALLY SLOW with `false`
   g_dbg_scale: Single = 1.0;
+  r_pixel_scale: Single = 1.0;
 
 
 implementation
@@ -196,6 +199,11 @@ var
   e_TextureFonts: array of TTextureFont = nil;
   e_CharFonts: array of TCharFont;
   //e_SavedTextures: array of TSavedTexture;
+  e_FBO: GLuint = 0;
+  e_RBO: GLuint = 0;
+  e_Frame: GLuint = 0;
+  e_FrameW: Integer = -1;
+  e_FrameH: Integer = -1;
 
 //function e_getTextGLId (ID: DWORD): GLuint; begin result := e_Textures[ID].tx.id; end;
 
@@ -371,6 +379,50 @@ begin
  if Height <> nil then Height^ := e_Textures[ID].tx.Height;
 end;
 
+procedure e_ResizeFramebuffer(Width, Height: Integer);
+begin
+  glBindTexture(GL_TEXTURE_2D, 0);
+  glBindRenderbuffer(GL_RENDERBUFFER, 0);
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+  if e_Frame > 0 then
+  begin
+    glDeleteTextures(1, @e_Frame);
+    e_Frame := 0;
+  end;
+
+  if e_RBO > 0 then
+  begin
+    glDeleteRenderbuffers(1, @e_RBO);
+    e_RBO := 0;
+  end;
+
+  if e_FBO > 0 then
+  begin
+    glDeleteFramebuffers(1, @e_FBO);
+    e_FBO := 0;
+  end;
+
+  e_FrameW := Width;
+  e_FrameH := Height;
+
+  glGenFramebuffers(1, @e_FBO);
+
+  glGenTextures(1, @e_Frame);
+  glBindTexture(GL_TEXTURE_2D, e_Frame);
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, Width, Height, 0, GL_RGB, GL_UNSIGNED_BYTE, nil);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+  glGenRenderbuffers(1, @e_RBO);
+  glBindRenderbuffer(GL_RENDERBUFFER, e_RBO);
+  glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, Width, Height);
+
+  glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
+  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, e_Frame, 0);
+  glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, e_RBO);
+end;
+
 procedure e_ResizeWindow(Width, Height: Integer);
 begin
   if Height = 0 then
@@ -399,6 +451,22 @@ begin
   glTexCoord2f(u, v); glVertex2i(x1, y0);
 end;
 
+procedure e_BlitFramebuffer(WinWidth, WinHeight: Integer);
+begin
+  if (e_FBO = 0) or (e_Frame = 0) then exit;
+  glDisable(GL_BLEND);
+  glEnable(GL_TEXTURE_2D);
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  glBindTexture(GL_TEXTURE_2D, e_Frame);
+  glColor4ub(255, 255, 255, 255);
+  e_SetViewPort(0, 0, WinWidth, WinHeight);
+  glBegin(GL_QUADS);
+  drawTxQuad(0, 0, WinWidth, WinHeight, e_FrameW, e_FrameH, 1, 1, TMirrorType.None);
+  glEnd();
+  glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
+  e_SetViewPort(0, 0, e_FrameW, e_FrameH);
+end;
+
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
                  Blending: Boolean; Mirror: TMirrorType = TMirrorType.None);
 begin

diff --git a/src/game/g_game.pas b/src/game/g_game.pas
index 854a15a978ea9dbb3faecef572e6973abaa77ebb..8d784c2a2be634127f934150244bae03af5e5cb2 100644 (file)
--- a/src/game/g_game.pas
+++ b/src/game/g_game.pas
@@ -291,7 +291,8 @@ var
   gMapToDelete: String;
   gTempDelete: Boolean = False;
   gLastMap: Boolean = False;
-  gWinSizeX, gWinSizeY: Integer;
+  gScreenWidth: Word;
+  gScreenHeight: Word;
   gResolutionChange: Boolean = False;
   gRC_Width, gRC_Height: Integer;
   gRC_FullScreen, gRC_Maximized: Boolean;
@@ -1065,7 +1066,7 @@ begin
 
           SortGameStat(CustomStat.PlayerStat);
 
-          if (gSaveStats or gScreenshotStats) and (Length(gPlayers) > 1) then
+          if (gSaveStats or gScreenshotStats) and (Length(CustomStat.PlayerStat) > 1) then
           begin
             t := Now;
             if g_Game_IsNet then StatFilename := NetServerName else StatFilename := 'local';
@@ -2876,7 +2877,7 @@ begin
   end;
 
   // HACK: take stats screenshot immediately after the first frame of the stats showing
-  if gScreenshotStats and not StatShotDone then
+  if gScreenshotStats and (not StatShotDone) and (Length(CustomStat.PlayerStat) > 1) then
   begin
     g_TakeScreenShot('stats/' + StatFilename);
     StatShotDone := True;
@@ -3418,7 +3419,7 @@ begin
     end
     else
     begin
-      glScissor(0, 0, gWinSizeX, gWinSizeY);
+      glScissor(0, 0, gScreenWidth, gScreenHeight);
     end;
     // no need to clear stencil buffer, light blitting will do it for us... but only for normal scale
     if (g_dbg_scale <> 1.0) then glClear(GL_STENCIL_BUFFER_BIT);
@@ -5972,7 +5973,7 @@ begin
     if cmd = 'd_window' then
     begin
       g_Console_Add(Format('gScreenWidth = %d, gScreenHeight = %d', [gScreenWidth, gScreenHeight]));
-      g_Console_Add(Format('gWinSizeX = %d, gWinSizeY = %d', [gWinSizeX, gWinSizeY]));
+      g_Console_Add(Format('gScreenWidth = %d, gScreenHeight = %d', [gScreenWidth, gScreenHeight]));
     end
     else if cmd = 'd_sounds' then
     begin
@@ -8181,6 +8182,7 @@ begin
   conRegVar('dbg_ignore_level_bounds', @g_dbg_ignore_bounds, 'ignore level bounds', '',  false);
 
   conRegVar('r_scale', @g_dbg_scale, 0.01, 100.0, 'render scale', '',  false);
+  conRegVar('r_resolution_scale', @r_pixel_scale, 0.01, 100.0, 'upscale factor', '', false);
 
   conRegVar('light_enabled', @gwin_k8_enable_light_experiments, 'enable/disable dynamic lighting', 'lighting');
   conRegVar('light_player_halo', @g_playerLight, 'enable/disable player halo', 'player light halo');

diff --git a/src/game/g_holmes.pas b/src/game/g_holmes.pas
index a2a55ad87bb0664ec651338a1b396a0994b7b77d..c173bd00312e9686a7e4cb9df0165251e0de4ce4 100644 (file)
--- a/src/game/g_holmes.pas
+++ b/src/game/g_holmes.pas
@@ -559,7 +559,7 @@ var
 
   procedure clearEdgeBmp ();
   begin
-    SetLength(edgeBmp, (gWinSizeX+4)*(gWinSizeY+4));
+    SetLength(edgeBmp, (gScreenWidth+4)*(gScreenHeight+4));
     FillChar(edgeBmp[0], Length(edgeBmp)*sizeof(edgeBmp[0]), 0);
   end;
 
@@ -574,19 +574,19 @@ var
     begin
       sx := pan.X-(vpx-1);
       len := pan.Width;
-      if (len > gWinSizeX+4) then len := gWinSizeX+4;
+      if (len > gScreenWidth+4) then len := gScreenWidth+4;
       if (sx < 0) then begin len += sx; sx := 0; end;
-      if (sx+len > gWinSizeX+4) then len := gWinSizeX+4-sx;
+      if (sx+len > gScreenWidth+4) then len := gScreenWidth+4-sx;
       if (len < 1) then exit;
       assert(sx >= 0);
-      assert(sx+len <= gWinSizeX+4);
+      assert(sx+len <= gScreenWidth+4);
       y0 := pan.Y-(vpy-1);
       y1 := y0+pan.Height;
       if (y0 < 0) then y0 := 0;
-      if (y1 > gWinSizeY+4) then y1 := gWinSizeY+4;
+      if (y1 > gScreenHeight+4) then y1 := gScreenHeight+4;
       while (y0 < y1) do
       begin
-        FillChar(edgeBmp[y0*(gWinSizeX+4)+sx], len*sizeof(edgeBmp[0]), 1);
+        FillChar(edgeBmp[y0*(gScreenWidth+4)+sx], len*sizeof(edgeBmp[0]), 1);
         Inc(y0);
       end;
     end
@@ -651,15 +651,15 @@ var
     glColor4f(r/255.0, g/255.0, b/255.0, 1.0);
     for y := 1 to vph do
     begin
-      a := @edgeBmp[y*(gWinSizeX+4)+1];
+      a := @edgeBmp[y*(gScreenWidth+4)+1];
       startLine(y);
       for x := 1 to vpw do
       begin
         if (a[0] <> 0) then
         begin
-          if (a[-1] = 0) or (a[1] = 0) or (a[-(gWinSizeX+4)] = 0) or (a[gWinSizeX+4] = 0) or
-             (a[-(gWinSizeX+4)-1] = 0) or (a[-(gWinSizeX+4)+1] = 0) or
-             (a[gWinSizeX+4-1] = 0) or (a[gWinSizeX+4+1] = 0) then
+          if (a[-1] = 0) or (a[1] = 0) or (a[-(gScreenWidth+4)] = 0) or (a[gScreenWidth+4] = 0) or
+             (a[-(gScreenWidth+4)-1] = 0) or (a[-(gScreenWidth+4)+1] = 0) or
+             (a[gScreenWidth+4-1] = 0) or (a[gScreenWidth+4+1] = 0) then
           begin
             putPixel(x);
           end;
@@ -684,7 +684,7 @@ var
     glColor4f(r/255.0, g/255.0, b/255.0, 1.0);
     for y := 1 to vph do
     begin
-      a := @edgeBmp[y*(gWinSizeX+4)+1];
+      a := @edgeBmp[y*(gScreenWidth+4)+1];
       startLine(y);
       for x := 1 to vpw do
       begin
@@ -1258,7 +1258,7 @@ begin
 
   gxSetContext(hlmContext);
   try
-    //glScissor(0, gWinSizeY-gPlayerScreenSize.Y-1, vpw, vph);
+    //glScissor(0, gScreenHeight-gPlayerScreenSize.Y-1, vpw, vph);
     //hlmContext.clip := TGxRect.Create(0, gScreenHeight-gPlayerScreenSize.Y-1, gPlayerScreenSize.X, gPlayerScreenSize.Y);
 
     {
@@ -1333,11 +1333,11 @@ begin
     begin
       for dx := -1 to 1 do
       begin
-        if (dx <> 0) or (dy <> 0) then hlmContext.drawText(4+dx, gWinSizeY-10+dy, s);
+        if (dx <> 0) or (dy <> 0) then hlmContext.drawText(4+dx, gScreenHeight-10+dy, s);
       end;
     end;
     hlmContext.color := TGxRGBA.Create(255, 255, 0);
-    hlmContext.drawText(4, gWinSizeY-10, s);
+    hlmContext.drawText(4, gScreenHeight-10, s);
     gxSetContext(nil);
   end;
 end;

diff --git a/src/game/g_menu.pas b/src/game/g_menu.pas
index 3513439d44e4b2574f2e33b1b64c9351324a74e6..fe650785d11a8b34baa3b623089b0788e1b37349 100644 (file)
--- a/src/game/g_menu.pas
+++ b/src/game/g_menu.pas
@@ -38,6 +38,7 @@ var
   PromptIP: string;
   PromptPort: Word;
   TempScale: Integer = -1;
+  TempResScale: Integer = -1;
 
 implementation
 
@@ -1881,8 +1882,8 @@ begin
   menu := TGUIMenu(g_GUI_GetWindow('OptionsVideoResMenu').GetControl('mOptionsVideoResMenu'));
 
   TGUILabel(menu.GetControl('lbCurrentRes')).Text :=
-    IntToStr(gScreenWidth) +
-    ' x ' + IntToStr(gScreenHeight) +
+    IntToStr(gWinSizeX) +
+    ' x ' + IntToStr(gWinSizeY) +
     ', ' + IntToStr(gBPP) + ' bpp';
 
   with TGUIListBox(menu.GetControl('lsResolution')) do
@@ -1904,6 +1905,9 @@ begin
       ItemIndex := 0
     else
       ItemIndex := 1;
+
+  TempResScale := Round(r_pixel_scale - 1);
+  TGUIScroll(menu.GetControl('scResFactor')).Value := TempResScale;
 end;
 
 procedure ProcApplyVideoOptions();
@@ -1911,18 +1915,34 @@ var
   menu: TGUIMenu;
   Fullscreen: Boolean;
   SWidth, SHeight: Integer;
+  ScaleChanged: Boolean;
   str: String;
 begin
   menu := TGUIMenu(g_GUI_GetWindow('OptionsVideoResMenu').GetControl('mOptionsVideoResMenu'));
 
   str := TGUIListBox(menu.GetControl('lsResolution')).SelectedItem;
-  SScanf(str, '%dx%d', [@SWidth, @SHeight]);
+  if str <> '' then
+    SScanf(str, '%dx%d', [@SWidth, @SHeight])
+  else
+  begin
+    SWidth := gWinSizeX;
+    SHeight := gWinSizeY;
+  end;
 
   Fullscreen := TGUISwitch(menu.GetControl('swFullScreen')).ItemIndex = 0;
 
-  if (SWidth <> gScreenWidth) or
-     (SHeight <> gScreenHeight) or
-     (Fullscreen <> gFullscreen) then
+  ScaleChanged := False;
+  if TGUIScroll(menu.GetControl('scResFactor')).Value <> TempResScale then
+  begin
+    TempResScale := TGUIScroll(menu.GetControl('scResFactor')).Value;
+    r_pixel_scale := TempResScale + 1;
+    ScaleChanged := True;
+  end;
+
+  if (SWidth <> gWinSizeX) or
+     (SHeight <> gWinSizeY) or
+     (Fullscreen <> gFullscreen) or
+     ScaleChanged then
   begin
     gResolutionChange := True;
     gRC_Width := SWidth;
@@ -2715,6 +2735,11 @@ begin
       AddItem(_lc[I_MENU_YES]);
       AddItem(_lc[I_MENU_NO]);
     end;
+    with AddScroll(_lc[I_MENU_GAME_SCALE_FACTOR]) do
+    begin
+      Name := 'scResFactor';
+      Max := 10;
+    end;
     AddSpace();
     AddButton(@ProcApplyVideoOptions, _lc[I_MENU_RESOLUTION_APPLY]);
     UpdateIndex();

diff --git a/src/game/g_options.pas b/src/game/g_options.pas
index 02889313813d3d9cbbba34e7db62f47efa24e6ac..706ca33a1a357d740a82b0282c9557e590a8f929 100644 (file)
--- a/src/game/g_options.pas
+++ b/src/game/g_options.pas
@@ -35,14 +35,14 @@ procedure g_Options_Commands (p: SSArray);
 const DF_Default_Megawad_Start = 'megawads/DOOM2D.WAD:\MAP01';
 
 var
-  gScreenWidth: Word;
-  gScreenHeight: Word;
   gBPP: Integer;
   gFreq: Byte;
   gFullscreen: Boolean;
+  gWinSizeX, gWinSizeY: Integer;
   gWinMaximized: Boolean;
   gVSync: Boolean;
   glLegacyNPOT: Boolean;
+  glRenderToFBO: Boolean = True;
   gTextureFilter: Boolean;
   gNoSound: Boolean;
   gSoundLevel: Integer;
@@ -132,6 +132,8 @@ begin
   (* Display 0 = Primary display *)
   gScreenWidth := 640;
   gScreenHeight := 480;
+  gWinSizeX := 640;
+  gWinSizeY := 480;
   //gBPP := SDL_BITSPERPIXEL(dispaly.format);
   gBPP := 32;
   {$IFDEF ANDROID}
@@ -142,8 +144,8 @@ begin
   if SDL_GetDesktopDisplayMode(0, @display) = 0 then
   begin
   {$IFDEF ANDROID}
-    gScreenWidth := display.w;
-    gScreenHeight := display.h;
+    gWinSizeX := display.w;
+    gWinSizeY := display.h;
   {$ELSE}
     (* Window must be smaller than display *)
     closest.w := display.w;
@@ -165,8 +167,8 @@ begin
       SDL_GetClosestDisplayMode(0, @target, @closest);
       Dec(percentage);
     end;
-    gScreenWidth := closest.w;
-    gScreenHeight := closest.h;
+    gWinSizeX := closest.w;
+    gWinSizeY := closest.h;
     //gBPP := SDL_BITSPERPIXEL(closest.format); (* Resolution list didn't work for some reason *)
   {$ENDIF}
   end
@@ -179,29 +181,31 @@ begin
   gVSync := True;
   gTextureFilter := True;
   glLegacyNPOT := False;
-  gRC_Width := gScreenWidth;
-  gRC_Height := gScreenHeight;
+  gRC_Width := gWinSizeX;
+  gRC_Height := gWinSizeY;
   gRC_FullScreen := gFullScreen;
   gRC_Maximized := gWinMaximized;
-  e_LogWriteLn('g_Options_SetDefaultVideo: w = ' + IntToStr(gScreenWidth) + ' h = ' + IntToStr(gScreenHeight));
+  e_LogWriteLn('g_Options_SetDefaultVideo: w = ' + IntToStr(gWinSizeX) + ' h = ' + IntToStr(gWinSizeY));
   g_Console_ResetBinds;
 end;
 {$ELSE}
 procedure g_Options_SetDefaultVideo;
 begin
-  gScreenWidth := 640;
-  gScreenHeight := 480;
+  gWinSizeX := 640;
+  gWinSizeY := 480;
   gBPP := 32;
   gFullScreen := False;
   gWinMaximized := False;
   gVSync := True;
   gTextureFilter := True;
   glLegacyNPOT := False;
-  gRC_Width := gScreenWidth;
-  gRC_Height := gScreenHeight;
+  gScreenWidth := gWinSizeX;
+  gScreenHeight := gWinSizeY;
+  gRC_Width := gWinSizeX;
+  gRC_Height := gWinSizeY;
   gRC_FullScreen := gFullScreen;
   gRC_Maximized := gWinMaximized;
-  e_LogWriteLn('g_Options_SetDefaultVideo: w = ' + IntToStr(gScreenWidth) + ' h = ' + IntToStr(gScreenHeight));
+  e_LogWriteLn('g_Options_SetDefaultVideo: w = ' + IntToStr(gWinSizeX) + ' h = ' + IntToStr(gWinSizeY));
   g_Console_ResetBinds;
 end;
 {$ENDIF}
@@ -811,6 +815,7 @@ initialization
   conRegVar('r_vsync', @gVSync, '', '');
   conRegVar('r_texfilter', @gTextureFilter, '', '');
   conRegVar('r_npot', @glNPOTOverride, '', '');
+  conRegVar('r_fbo', @glRenderToFBO, '', '');
 
   (* Sound *)
   conRegVar('s_nosound', @gNoSound, '', '');

diff --git a/src/game/g_window.pas b/src/game/g_window.pas
index afc23e2b1b22a6e22f4adcd9e89cfa154495e10b..7774c0a34c0c03b2bda5fd5418ece817dc492963 100644 (file)
--- a/src/game/g_window.pas
+++ b/src/game/g_window.pas
@@ -326,6 +326,15 @@ begin
       mdfo.Free();
       Halt(0);
     end;
+
+    if (arg = '--pixel-scale') or (arg = '-pixel-scale') then
+    begin
+      if (idx <= ParamCount) then
+      begin
+        if not conParseFloat(r_pixel_scale, ParamStr(idx)) then r_pixel_scale := 1.0;
+        Inc(idx);
+      end;
+    end;
   end;
 
 {$IFNDEF USE_SYSSTUB}
@@ -333,6 +342,7 @@ begin
   glLegacyNPOT := not (GLExtensionSupported('GL_ARB_texture_non_power_of_two') or GLExtensionSupported('GL_OES_texture_npot'));
 {$ELSE}
   glLegacyNPOT := False;
+  glRenderToFBO := False;
 {$ENDIF}
   if glNPOTOverride and glLegacyNPOT then
   begin

diff --git a/src/game/sdl/g_system.pas b/src/game/sdl/g_system.pas
index 00770890eb99be483c7e1f2b6cfe3e7cad38efaf..e5f62750ea6b0ca2c993025d4f7ab23125eb1d35 100644 (file)
--- a/src/game/sdl/g_system.pas
+++ b/src/game/sdl/g_system.pas
@@ -74,10 +74,17 @@ 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;
     {$IFDEF ENABLE_HOLMES}
       fuiScrWdt := w;
       fuiScrHgt := h;
@@ -120,6 +127,15 @@ implementation
       begin
         {$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(GetTitle(), nil);
         gFullScreen := fullscreen;
@@ -136,6 +152,8 @@ implementation
 
   procedure sys_Repaint;
   begin
+    if glRenderToFBO then
+      e_BlitFramebuffer(gWinSizeX, gWinSizeY);
     SDL_GL_SwapBuffers
   end;
 

diff --git a/src/game/sdl2/g_system.pas b/src/game/sdl2/g_system.pas
index 694042c37dea2db0f756e690b4d14a00f63f16e7..89cebaf02b5e84d292118595e878a4a17e680f52 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;
     {$IFDEF ENABLE_HOLMES}
       fuiScrWdt := w;
       fuiScrHgt := h;
@@ -151,6 +158,15 @@ implementation
         begin
           {$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}
           if (fullscreen = false) and (maximized = false) and (wc = false) then
           begin
@@ -209,6 +225,8 @@ implementation
 
   procedure sys_Repaint;
   begin
+    if glRenderToFBO then
+      e_BlitFramebuffer(gWinSizeX, gWinSizeY);
     SDL_GL_SwapWindow(window)
   end;
 

diff --git a/src/game/sdl2/g_touch.pas b/src/game/sdl2/g_touch.pas
index 23cfbc1fc3ca8920b518d9e0af0494ae7de90ab7..3f999ed551d03babf7c615b457c774f810d1b605 100644 (file)
--- a/src/game/sdl2/g_touch.pas
+++ b/src/game/sdl2/g_touch.pas
@@ -65,7 +65,7 @@ implementation
       dpi := 96;
     {$ENDIF}
 
-    sz := Trunc(g_touch_size * dpi); sw := gScreenWidth; sh := gScreenHeight;
+    sz := Trunc(g_touch_size * dpi); sw := gWinSizeX; sh := gWinSizeY;
     x := 0; y := Round(sh * g_touch_offset / 100);
     w := sz; h := sz;
 
@@ -274,8 +274,8 @@ implementation
       Exit;
 
     finger := ev.fingerId + 2;
-    x := Trunc(ev.x * gScreenWidth);
-    y := Trunc(ev.y * gScreenHeight);
+    x := Trunc(ev.x * gWinSizeX);
+    y := Trunc(ev.y * gWinSizeY);
 
     for i := VK_FIRSTKEY to VK_LASTKEY do
     begin