From bc1d4f7c8cac778e3b0272cac86e5f2af6964263 Mon Sep 17 00:00:00 2001
From: Gregor Brunmar <gbrunmar.ros@gmail.com>
Date: Mon, 5 May 2008 16:49:13 +0000
Subject: [PATCH] Implemented IDirect3DDevice9::GetAvailableTextureMem()

svn path=/trunk/; revision=33299
---
 reactos/dll/directx/d3d9/d3d9_device.c  | 36 +++++++++++++++++++++++--
 reactos/dll/directx/d3d9/d3d9_private.h |  3 ++-
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/reactos/dll/directx/d3d9/d3d9_device.c b/reactos/dll/directx/d3d9/d3d9_device.c
index 599be8099b4..57ed64224c0 100644
--- a/reactos/dll/directx/d3d9/d3d9_device.c
+++ b/reactos/dll/directx/d3d9/d3d9_device.c
@@ -70,11 +70,43 @@ static HRESULT WINAPI IDirect3DDevice9Impl_TestCooperativeLevel(LPDIRECT3DDEVICE
     return D3D_OK;
 }
 
+/*++
+* @name IDirect3DDevice9::GetAvailableTextureMem
+* @implemented
+*
+* The function IDirect3DDevice9Impl_GetAvailableTextureMem returns a pointer to the IDirect3D9 object
+* that created this device.
+*
+* @param LPDIRECT3D iface
+* Pointer to the IDirect3DDevice9 object returned from IDirect3D9::CreateDevice()
+*
+* @return UINT
+* The method returns an estimated the currently available texture memory in bytes rounded
+* to the nearest MB. Applications should NOT use this as an exact number.
+*
+*/
 static UINT WINAPI IDirect3DDevice9Impl_GetAvailableTextureMem(LPDIRECT3DDEVICE9 iface)
 {
-    UNIMPLEMENTED
+    UINT AvailableTextureMemory = 0;
+    DD_GETAVAILDRIVERMEMORYDATA ddGetAvailDriverMemoryData;
 
-    return D3D_OK;
+    LPDIRECT3DDEVICE9_INT This = impl_from_IDirect3DDevice9(iface);
+    LOCK_D3DDEVICE9();
+
+    memset(&ddGetAvailDriverMemoryData, 0, sizeof(ddGetAvailDriverMemoryData));
+    ddGetAvailDriverMemoryData.lpDD = (PDD_DIRECTDRAW_GLOBAL)&This->DeviceData[0].pUnknown6BC->hDD;
+
+    if (DDHAL_DRIVER_HANDLED == (*This->DeviceData[0].D3D9Callbacks.DdGetAvailDriverMemory)(&ddGetAvailDriverMemoryData))
+    {
+        if (DD_OK == ddGetAvailDriverMemoryData.ddRVal)
+        {
+            /* Round it up to the nearest MB */
+            AvailableTextureMemory = (ddGetAvailDriverMemoryData.dwFree + 0x80000) & 0xFFF00000;
+        }
+    }
+
+    UNLOCK_D3DDEVICE9();
+    return AvailableTextureMemory;
 }
 
 static HRESULT WINAPI IDirect3DDevice9Impl_EvictManagedResources(LPDIRECT3DDEVICE9 iface)
diff --git a/reactos/dll/directx/d3d9/d3d9_private.h b/reactos/dll/directx/d3d9/d3d9_private.h
index 5c5699d7835..3d98d6c9d6f 100644
--- a/reactos/dll/directx/d3d9/d3d9_private.h
+++ b/reactos/dll/directx/d3d9/d3d9_private.h
@@ -10,6 +10,7 @@
 
 #include <windows.h>
 #include <ddraw.h>
+#include <ddrawint.h>
 
 #define D3D9_INT_MAX_NUM_ADAPTERS   12
 
@@ -107,7 +108,7 @@ typedef struct _tagD3D9_CALLBACKS
 /* 0x0044 */    DWORD DdFlip;
 /* 0x0048 */    DWORD DdGetBltStatus;
 /* 0x004c */    DWORD DdGetFlipStatus;
-/* 0x0050 */    DWORD DdGetAvailDriverMemory;
+/* 0x0050 */    PDD_GETAVAILDRIVERMEMORY DdGetAvailDriverMemory;
 /* 0x0054 */    DWORD unknown0115;
 /* 0x0058 */    DWORD DdSetMode;
 /* 0x005c */    DWORD DdSetExclusiveMode;