fix render layer guid linking w/out font provider layer; eliminate generation number on render handles; sketch out tester scratch program for text drawing performance

src/render/d3d11/render_d3d11.c

@@ -39,7 +39,7 @@ internal R_D3D11_Window *
 r_d3d11_window_from_handle(R_Handle handle)
 {
   R_D3D11_Window *window = (R_D3D11_Window *)handle.u64[0];
-  if(window->generation != handle.u64[1])
+  if(window == 0)
   {
     window = &r_d3d11_window_nil;
   }
@@ -51,7 +51,6 @@ r_d3d11_handle_from_window(R_D3D11_Window *window)
 {
   R_Handle handle = {0};
   handle.u64[0] = (U64)window;
-  handle.u64[1] = window->generation;
   return handle;
 }
 
@@ -59,7 +58,7 @@ internal R_D3D11_Tex2D *
 r_d3d11_tex2d_from_handle(R_Handle handle)
 {
   R_D3D11_Tex2D *texture = (R_D3D11_Tex2D *)handle.u64[0];
-  if(texture == 0 || texture->generation != handle.u64[1])
+  if(texture == 0)
   {
     texture = &r_d3d11_tex2d_nil;
   }
@@ -71,7 +70,6 @@ r_d3d11_handle_from_tex2d(R_D3D11_Tex2D *texture)
 {
   R_Handle handle = {0};
   handle.u64[0] = (U64)texture;
-  handle.u64[1] = texture->generation;
   return handle;
 }
 
@@ -79,7 +77,7 @@ internal R_D3D11_Buffer *
 r_d3d11_buffer_from_handle(R_Handle handle)
 {
   R_D3D11_Buffer *buffer = (R_D3D11_Buffer *)handle.u64[0];
-  if(buffer == 0 || buffer->generation != handle.u64[1])
+  if(buffer == 0)
   {
     buffer = &r_d3d11_buffer_nil;
   }
@@ -91,7 +89,6 @@ r_d3d11_handle_from_buffer(R_D3D11_Buffer *buffer)
 {
   R_Handle handle = {0};
   handle.u64[0] = (U64)buffer;
-  handle.u64[1] = buffer->generation;
   return handle;
 }
 

src/render/d3d11/render_d3d11.h

@@ -4,6 +4,9 @@
 #ifndef RENDER_D3D11_H
 #define RENDER_D3D11_H
 
+#include <combaseapi.h>
+#include <dcommon.h>
+#include <initguid.h>
 #include <windows.h>
 #include <d3d11_1.h>
 #include <d3dcompiler.h>

src/render/render_core.h

@@ -29,9 +29,9 @@ enum
 typedef union R_Handle R_Handle;
 union R_Handle
 {
-  U64 u64[2];
-  U32 u32[4];
-  U16 u16[8];
+  U64 u64[1];
+  U32 u32[2];
+  U16 u16[4];
 };
 
 ////////////////////////////////