remove unnecessary clears on flip

FunkyFr3sh · FunkyFr3sh · commit c61389d105bc · 2024-05-02T05:53:29.000+02:00
diff --git a/src/ddsurface.c b/src/ddsurface.c
@@ -762,7 +762,7 @@ HRESULT dds_Flip(IDirectDrawSurfaceImpl* This, IDirectDrawSurfaceImpl* lpDDSurfa
         InterlockedExchangePointer((void*)&backbuffer->hdc, dc);
         InterlockedExchangePointer(&backbuffer->mapping, map);
 
-        if (g_config.flipclear)
+        if (g_config.flipclear && (This->caps & DDSCAPS_PRIMARYSURFACE))
         {
             blt_clear(buf, 0, backbuffer->size);
         }

Original file line number	Diff line number	Diff line change
`@@ -762,7 +762,7 @@ HRESULT dds_Flip(IDirectDrawSurfaceImpl* This, IDirectDrawSurfaceImpl* lpDDSurfa`
`762`	`762`	`InterlockedExchangePointer((void*)&backbuffer->hdc, dc);`
`763`	`763`	`InterlockedExchangePointer(&backbuffer->mapping, map);`
`764`	`764`
`765`		`- if (g_config.flipclear)`
	`765`	`+ if (g_config.flipclear && (This->caps & DDSCAPS_PRIMARYSURFACE))`
`766`	`766`	`{`
`767`	`767`	`blt_clear(buf, 0, backbuffer->size);`
`768`	`768`	`}`