[4/4] d3dx9: Implement volume texture filtering in D3DXFilterTexture.

[Józef Kucia]

---
 dlls/d3dx9_36/tests/texture.c |   27 ++++++++++++++++++++++
 dlls/d3dx9_36/texture.c       |   49 ++++++++++++++++++++++++++++++++++++----
 2 files changed, 71 insertions(+), 5 deletions(-)

diff --git a/dlls/d3dx9_36/tests/texture.c b/dlls/d3dx9_36/tests/texture.c
index 44bf235..95e1dc5 100644
--- a/dlls/d3dx9_36/tests/texture.c
+++ b/dlls/d3dx9_36/tests/texture.c
@@ -751,6 +751,7 @@ static void test_D3DXFilterTexture(IDirect3DDevice9 *device)
 {
     IDirect3DTexture9 *tex;
     IDirect3DCubeTexture9 *cubetex;
+    IDirect3DVolumeTexture9 *voltex;
     HRESULT hr;
 
     hr = IDirect3DDevice9_CreateTexture(device, 256, 256, 5, 0, D3DFMT_A8R8G8B8, D3DPOOL_MANAGED, &tex, NULL);
@@ -835,6 +836,32 @@ static void test_D3DXFilterTexture(IDirect3DDevice9 *device)
     else
         skip("Failed to create texture\n");
 
+    /* Volume texture test */
+    hr = IDirect3DDevice9_CreateVolumeTexture(device, 256, 256, 4, 0, 0, D3DFMT_A8R8G8B8, D3DPOOL_MANAGED, &voltex, NULL);
+    if (SUCCEEDED(hr))
+    {
+        DWORD level_count = IDirect3DVolumeTexture9_GetLevelCount(voltex);
+
+        hr = D3DXFilterTexture((IDirect3DBaseTexture9*) voltex, NULL, 0, D3DX_FILTER_NONE);
+        ok(hr == D3D_OK, "D3DXFilterTexture returned %#x, expected %#x\n", hr, D3D_OK);
+
+        hr = D3DXFilterTexture((IDirect3DBaseTexture9*) voltex, NULL, 0, D3DX_DEFAULT);
+        ok(hr == D3D_OK, "D3DXFilterTexture returned %#x, expected %#x\n", hr, D3D_OK);
+
+        hr = D3DXFilterTexture((IDirect3DBaseTexture9*) voltex, NULL, 0, D3DX_FILTER_BOX);
+        ok(hr == D3D_OK, "D3DXFilterTexture returned %#x, expected %#x\n", hr, D3D_OK);
+
+        hr = D3DXFilterTexture((IDirect3DBaseTexture9*) voltex, NULL, level_count - 1, D3DX_DEFAULT);
+        ok(hr == D3D_OK, "D3DXFilterTexture returned %#x, expected %#x\n", hr, D3D_OK);
+
+        hr = D3DXFilterTexture((IDirect3DBaseTexture9*) voltex, NULL, level_count, D3DX_DEFAULT);
+        ok(hr == D3DERR_INVALIDCALL, "D3DXFilterTexture returned %#x, expected %#x\n", hr, D3DERR_INVALIDCALL);
+
+        IDirect3DVolumeTexture9_Release(voltex);
+    }
+    else
+        skip("Failed to create volume texture\n");
+
     /* Test textures with D3DUSAGE_AUTOGENMIPMAP usage */
     if (!is_autogenmipmap_supported(device, D3DRTYPE_TEXTURE))
     {
diff --git a/dlls/d3dx9_36/texture.c b/dlls/d3dx9_36/texture.c
index 91f97c2..ec9bad9 100644
--- a/dlls/d3dx9_36/texture.c
+++ b/dlls/d3dx9_36/texture.c
@@ -61,8 +61,8 @@ static HRESULT get_surface(D3DRESOURCETYPE type, LPDIRECT3DBASETEXTURE9 tex,
     }
 }
 
-HRESULT WINAPI D3DXFilterTexture(LPDIRECT3DBASETEXTURE9 texture,
-                                 CONST PALETTEENTRY *palette,
+HRESULT WINAPI D3DXFilterTexture(IDirect3DBaseTexture9 *texture,
+                                 const PALETTEENTRY *palette,
                                  UINT srclevel,
                                  DWORD filter)
 {
@@ -70,7 +70,7 @@ HRESULT WINAPI D3DXFilterTexture(LPDIRECT3DBASETEXTURE9 texture,
     HRESULT hr;
     D3DRESOURCETYPE type;
 
-    TRACE("(%p, %p, %d, %d)\n", texture, palette, srclevel, filter);
+    TRACE("(%p, %p, %u, %#x)\n", texture, palette, srclevel, filter);
 
     if (!texture)
         return D3DERR_INVALIDCALL;
@@ -137,9 +137,48 @@ HRESULT WINAPI D3DXFilterTexture(LPDIRECT3DBASETEXTURE9 texture,
             return D3D_OK;
         }
 
+        case D3DRTYPE_VOLUMETEXTURE:
+        {
+            D3DVOLUME_DESC desc;
+            int level, level_count;
+            IDirect3DVolume9 *top_volume, *mip_volume;
+            IDirect3DVolumeTexture9 *volume_texture = (IDirect3DVolumeTexture9*) texture;
+
+            IDirect3DVolumeTexture9_GetLevelDesc(volume_texture, srclevel, &desc);
+
+            if (filter == D3DX_DEFAULT)
+            {
+                if (is_pow2(desc.Width) && is_pow2(desc.Height) && is_pow2(desc.Depth))
+                    filter = D3DX_FILTER_BOX;
+                else
+                    filter = D3DX_FILTER_BOX | D3DX_FILTER_DITHER;
+            }
+
+            hr = IDirect3DVolumeTexture9_GetVolumeLevel(volume_texture, srclevel, &top_volume);
+            if (FAILED(hr))
+                return hr;
+
+            level_count = IDirect3DVolumeTexture9_GetLevelCount(volume_texture);
+            for (level = srclevel + 1; level < level_count; level++)
+            {
+                IDirect3DVolumeTexture9_GetVolumeLevel(volume_texture, level, &mip_volume);
+                hr = D3DXLoadVolumeFromVolume(mip_volume, palette, NULL, top_volume, palette, NULL, filter, 0);
+                IDirect3DVolume9_Release(top_volume);
+                top_volume = mip_volume;
+
+                if (FAILED(hr))
+                    break;
+            }
+
+            IDirect3DVolume9_Release(top_volume);
+            if (FAILED(hr))
+                return hr;
+
+            return D3D_OK;
+        }
+
         default:
-            FIXME("Implement volume texture filtering\n");
-            return E_NOTIMPL;
+            return D3DERR_INVALIDCALL;
     }
 }
 
-- 
1.7.8.6