wgl: Move wgl* non-extension definitions to libgl-gdi

Reviewed By: Bill Kristiansen <billkris@microsoft.com>

Reviewed-by: Charmaine Lee >charmainel@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12677>

src/gallium/frontends/wgl/meson.build

@@ -43,7 +43,6 @@ libwgl = static_library(
     'stw_pixelformat.c',
     'stw_st.c',
     'stw_tls.c',
-    'stw_wgl.c',
   ),
   c_args : [
     '-D_GDI32_',             # prevent wgl* being declared __declspec(dllimport)

src/gallium/frontends/wgl/stw_ext_context.c

@@ -210,3 +210,9 @@ wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
 
    return stw_make_current(hDrawDC, hReadDC, dhglrc);
 }
+
+HDC APIENTRY
+wglGetCurrentReadDCARB(VOID)
+{
+   return stw_get_current_read_dc();
+}

src/gallium/targets/libgl-gdi/meson.build

@@ -28,7 +28,7 @@ ogldef = files('opengl32.def')[0]
 
 libopengl32 = shared_library(
   'opengl32',
-  ['libgl_gdi.c'],
+  ['libgl_gdi.c', 'stw_wgl.c'],
   vs_module_defs : ogldef,
   include_directories : [
     inc_include, inc_src, inc_mapi, inc_mesa, inc_gallium, inc_gallium_aux, inc_wgl, inc_gallium_winsys, inc_gallium_winsys_sw, inc_gallium_drivers,
@@ -41,6 +41,7 @@ libopengl32 = shared_library(
     dep_ws2_32, idep_nir, idep_mesautil, driver_swrast, driver_swr,
     driver_d3d12, driver_zink, winsys_d3d12_wgl
   ],
+  c_args : ['-D_GDI32_'],
   link_args : opengl32_link_args,
   name_prefix : '',  # otherwise mingw will create libopengl32.dll
   install : true,

src/gallium/targets/libgl-gdi/stw_wgl.c

@@ -100,12 +100,6 @@ wglGetCurrentDC( VOID )
    return stw_get_current_dc();
 }
 
-WINGDIAPI HDC APIENTRY
-wglGetCurrentReadDCARB( VOID )
-{
-   return stw_get_current_read_dc();
-}
-
 
 WINGDIAPI BOOL APIENTRY
 wglMakeCurrent(