ddraw: Implement FPU mode fixup in d3d7 device.

As documented in DirectX7 SDK, d3d7 devices set FPU mode (control word) on every call and restore it back to original state before returning, if created in DDSCL_FPUPRESERVE cooperative mode. This allows games to work with FPU in a possibly incompatible mode and avoid resetting it all the time.

ddraw: Implement FPU mode fixup in d3d7 device.
cb5e06c9 · Alexander Dorofeyev · Alexandre Julliard · a850cafe · cb5e06c9 · cb5e06c9
Commit cb5e06c9 authored Jun 20, 2008 by Alexander Dorofeyev Committed by Alexandre Julliard Jun 23, 2008
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Showing with 7 additions and 4 deletions

ddraw.c dlls/ddraw/ddraw.c +0 -2

ddraw_private.h dlls/ddraw/ddraw_private.h +2 -1

device.c dlls/ddraw/device.c +0 -0

direct3d.c dlls/ddraw/direct3d.c +5 -1

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--- a/dlls/ddraw/ddraw.c
+++ b/dlls/ddraw/ddraw.c
@@ -524,8 +524,6 @@ IDirectDrawImpl_SetCooperativeLevel(IDirectDraw7 *iface,
        WARN("(%p) Unhandled flag DDSCL_ALLOWMODEX, harmless\n", This);
    if(cooplevel & DDSCL_FPUSETUP)
        WARN("(%p) Unhandled flag DDSCL_FPUSETUP, harmless\n", This);
-    if(cooplevel & DDSCL_FPUPRESERVE)
-        WARN("(%p) Unhandled flag DDSCL_FPUPRESERVE, harmless\n", This);

    /* Store the cooperative_level */
    This->cooperative_level |= cooplevel;

--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -358,7 +358,8 @@ struct IDirect3DDeviceImpl
 };

 /* Vtables in various versions */
-const IDirect3DDevice7Vtbl IDirect3DDevice7_Vtbl;
+const IDirect3DDevice7Vtbl IDirect3DDevice7_FPUSetup_Vtbl;
+const IDirect3DDevice7Vtbl IDirect3DDevice7_FPUPreserve_Vtbl;
 const IDirect3DDevice3Vtbl IDirect3DDevice3_Vtbl;
 const IDirect3DDevice2Vtbl IDirect3DDevice2_Vtbl;
 const IDirect3DDeviceVtbl  IDirect3DDevice1_Vtbl;

--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
--- a/dlls/ddraw/direct3d.c
+++ b/dlls/ddraw/direct3d.c
@@ -805,7 +805,11 @@ IDirect3DImpl_7_CreateDevice(IDirect3D7 *iface,
        return DDERR_OUTOFMEMORY;
    }

-    ICOM_INIT_INTERFACE(object, IDirect3DDevice7, IDirect3DDevice7_Vtbl);
+    if (This->cooperative_level & DDSCL_FPUPRESERVE)
+        ICOM_INIT_INTERFACE(object, IDirect3DDevice7, IDirect3DDevice7_FPUPreserve_Vtbl);
+    else
+        ICOM_INIT_INTERFACE(object, IDirect3DDevice7, IDirect3DDevice7_FPUSetup_Vtbl);
+
    ICOM_INIT_INTERFACE(object, IDirect3DDevice3, IDirect3DDevice3_Vtbl);
    ICOM_INIT_INTERFACE(object, IDirect3DDevice2, IDirect3DDevice2_Vtbl);
    ICOM_INIT_INTERFACE(object, IDirect3DDevice, IDirect3DDevice1_Vtbl);