From 4b95487bddd34f6dac3eb84f34110e0acc97470c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20D=C3=B6singer?= <stefan@codeweavers.com>
Date: Tue, 27 Nov 2012 00:00:30 +0100
Subject: [PATCH] ddraw: Don't create a wastefully large index buffer.

---
 dlls/ddraw/ddraw_private.h |  1 +
 dlls/ddraw/device.c        | 29 ++++++-----------------------
 2 files changed, 7 insertions(+), 23 deletions(-)

diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index 319fcabec8d..a7fac2956c5 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -276,6 +276,7 @@ struct d3d_device
     struct wined3d_device *wined3d_device;
     struct ddraw *ddraw;
     struct wined3d_buffer *indexbuffer;
+    UINT indexbuffer_size;
     struct ddraw_surface *target;
 
     /* Viewport management */
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index ba7d0118f16..dd7d3ee5a54 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -240,7 +240,7 @@ static ULONG WINAPI d3d_device_inner_Release(IUnknown *iface)
          * care of that on uninit_3d(). */
 
         /* Free the index buffer. */
-        wined3d_buffer_decref(This->indexbuffer);
+        if (This->indexbuffer) wined3d_buffer_decref(This->indexbuffer);
 
         /* Set the device up to render to the front buffer since the back
          * buffer will vanish soon. */
@@ -4039,8 +4039,6 @@ static HRESULT d3d_device7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
     struct d3d_device *This = impl_from_IDirect3DDevice7(iface);
     struct d3d_vertex_buffer *vb = unsafe_impl_from_IDirect3DVertexBuffer7(D3DVertexBuf);
     DWORD stride = get_flexible_vertex_size(vb->fvf);
-    struct wined3d_resource *wined3d_resource;
-    struct wined3d_resource_desc desc;
     WORD *LockedIndices;
     HRESULT hr;
 
@@ -4058,13 +4056,9 @@ static HRESULT d3d_device7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
 
     wined3d_device_set_vertex_declaration(This->wined3d_device, vb->wineD3DVertexDeclaration);
 
-    /* check that the buffer is large enough to hold the indices,
-     * reallocate if necessary. */
-    wined3d_resource = wined3d_buffer_get_resource(This->indexbuffer);
-    wined3d_resource_get_desc(wined3d_resource, &desc);
-    if (desc.size < IndexCount * sizeof(WORD))
+    if (This->indexbuffer_size < IndexCount * sizeof(WORD))
     {
-        UINT size = max(desc.size * 2, IndexCount * sizeof(WORD));
+        UINT size = max(This->indexbuffer_size * 2, IndexCount * sizeof(WORD));
         struct wined3d_buffer *buffer;
 
         TRACE("Growing index buffer to %u bytes\n", size);
@@ -4073,13 +4067,14 @@ static HRESULT d3d_device7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
                 WINED3D_POOL_DEFAULT, NULL, &ddraw_null_wined3d_parent_ops, &buffer);
         if (FAILED(hr))
         {
-            ERR("(%p) IWineD3DDevice::CreateIndexBuffer failed with hr = %08x\n", This, hr);
+            ERR("(%p) wined3d_buffer_create_ib failed with hr = %08x\n", This, hr);
             wined3d_mutex_unlock();
             return hr;
         }
 
-        wined3d_buffer_decref(This->indexbuffer);
+        if (This->indexbuffer) wined3d_buffer_decref(This->indexbuffer);
         This->indexbuffer = buffer;
+        This->indexbuffer_size = size;
     }
 
     /* Copy the index stream into the index buffer. A new IWineD3DDevice
@@ -6529,17 +6524,6 @@ static HRESULT d3d_device_init(struct d3d_device *device, struct ddraw *ddraw,
     device->legacy_projection = ident;
     device->legacy_clipspace = ident;
 
-    /* Create an index buffer, it's needed for indexed drawing */
-    hr = wined3d_buffer_create_ib(ddraw->wined3d_device, 0x40000 /* Length. Don't know how long it should be */,
-            WINED3DUSAGE_DYNAMIC /* Usage */, WINED3D_POOL_DEFAULT, NULL,
-            &ddraw_null_wined3d_parent_ops, &device->indexbuffer);
-    if (FAILED(hr))
-    {
-        ERR("Failed to create an index buffer, hr %#x.\n", hr);
-        ddraw_handle_table_destroy(&device->handle_table);
-        return hr;
-    }
-
     /* This is for convenience. */
     device->wined3d_device = ddraw->wined3d_device;
     wined3d_device_incref(ddraw->wined3d_device);
@@ -6549,7 +6533,6 @@ static HRESULT d3d_device_init(struct d3d_device *device, struct ddraw *ddraw,
     if (FAILED(hr))
     {
         ERR("Failed to set render target, hr %#x.\n", hr);
-        wined3d_buffer_decref(device->indexbuffer);
         ddraw_handle_table_destroy(&device->handle_table);
         return hr;
     }