X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fgame%2Fg_window.pas;h=6dfa778096ff33f616b553c00539c81b542227fd;hb=ebb13957295d3f50ba51ff5b871310570d0d4dfe;hp=651675a2572865cb3fc2feeaeb657f963a9efbb5;hpb=8d318aca88d4253961e698b0cd05399989efe252;p=d2df-sdl.git

diff --git a/src/game/g_window.pas b/src/game/g_window.pas
index 651675a..6dfa778 100644
--- a/src/game/g_window.pas
+++ b/src/game/g_window.pas
@@ -36,6 +36,10 @@ function  GetDisplayModes(dBPP: DWORD; var SelRes: DWORD): SArray;
 function  g_Window_SetDisplay(PreserveGL: Boolean = False): Boolean;
 function  g_Window_SetSize(W, H: Word; FScreen: Boolean): Boolean;
 
+var
+  gwin_dump_extensions: Boolean = false;
+  gwin_has_stencil: Boolean = false;
+
 implementation
 
 uses
@@ -637,10 +641,55 @@ begin
   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+  SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1); // lights; it is enough to have 1-bit stencil buffer for lighting
   SDL_GL_SetSwapInterval(v);
 end;
 
+function glHasExtension (name: AnsiString): Boolean;
+var
+  exts: PChar;
+  i: Integer;
+  found: Boolean;
+  extName: ShortString;
+begin
+  result := false;
+  if length(name) = 0 then exit;
+  exts := glGetString(GL_EXTENSIONS);
+  if exts = nil then exit;
+  while (exts[0] <> #0) and (exts[0] = ' ') do Inc(exts);
+  while exts[0] <> #0 do
+  begin
+    if gwin_dump_extensions then
+    begin
+      i := 0;
+      while (exts[i] <> #0) and (exts[i] <> ' ') do Inc(i);
+      if i > 255 then
+      begin
+        e_WriteLog('FUUUUUUUUUUUUU', MSG_WARNING);
+      end
+      else
+      begin
+        Move(exts^, extName[1], i);
+        extName[0] := Char(i);
+        e_WriteLog(Format('EXT: %s', [extName]), MSG_NOTIFY);
+      end;
+    end;
+    found := true;
+    for i := 0 to length(name)-1 do
+    begin
+      if exts[i] = #0 then begin found := false; break; end;
+      if exts[i] <> name[i+1] then begin found := false; break; end;
+    end;
+    if found and ((exts[length(name)] = #0) or (exts[length(name)] = ' ')) then begin result := true; exit; end;
+    while (exts[0] <> #0) and (exts[0] <> ' ') do Inc(exts);
+    while (exts[0] <> #0) and (exts[0] = ' ') do Inc(exts);
+  end;
+end;
+
 function SDLMain(): Integer;
+var
+  idx: Integer;
+  ltmp: Integer;
 begin
 {$IFDEF HEADLESS}
   e_NoGraphics := True;
@@ -658,6 +707,28 @@ begin
 
   {EnumDisplayModes();}
 
+  for idx := 1 to ParamCount do
+  begin
+    if ParamStr(idx) = '--opengl-dump-exts' then gwin_dump_extensions := true;
+  end;
+
+  SDL_GL_GetAttribute(SDL_GL_STENCIL_SIZE, @ltmp);
+  e_WriteLog(Format('stencil buffer size: %d', [ltmp]), MSG_WARNING);
+
+  gwin_has_stencil := (ltmp > 0);
+
+  if not glHasExtension('GL_ARB_texture_non_power_of_two') then
+  begin
+    e_WriteLog('Driver DID''T advertised NPOT textures support', MSG_WARNING);
+    glLegacyNPOT := true;
+  end
+  else
+  begin
+    e_WriteLog('Driver advertised NPOT textures support', MSG_NOTIFY);
+    glLegacyNPOT := false;
+  end;
+  gwin_dump_extensions := false;
+
   Init();
   Time_Old := GetTimer();