[PATCH] d3dx9: Ignore filter in LoadSurfaceFromSurface when rects match

[Robin Kertels]

This allows us to use IDirect3DDevice9_StretchRect
and avoid GPU synchronization.
It massively improves performance in Dead Space 1 which
calls LoadSurfaceFromSurface every frame before presenting.

Signed-off-by: Robin Kertels 
---
 dlls/d3dx9_36/surface.c | 100 +++++++++++++++++++++++++++++++---------
 1 file changed, 78 insertions(+), 22 deletions(-)

diff --git a/dlls/d3dx9_36/surface.c b/dlls/d3dx9_36/surface.c
index a5143cbee4..c351fe58cd 100644
--- a/dlls/d3dx9_36/surface.c
+++ b/dlls/d3dx9_36/surface.c
@@ -2142,10 +2142,13 @@ HRESULT WINAPI D3DXLoadSurfaceFromSurface(IDirect3DSurface9 *dst_surface,
         const PALETTEENTRY *dst_palette, const RECT *dst_rect, IDirect3DSurface9 *src_surface,
         const PALETTEENTRY *src_palette, const RECT *src_rect, DWORD filter, D3DCOLOR color_key)
 {
+    const struct pixel_format_desc *srcformatdesc, *destformatdesc;
+    struct volume src_size, dst_size;
+    RECT dst_rect_temp;
     IDirect3DSurface9 *temp_surface;
     D3DTEXTUREFILTERTYPE d3d_filter;
     IDirect3DDevice9 *device;
-    D3DSURFACE_DESC src_desc;
+    D3DSURFACE_DESC src_desc, dst_desc;
     D3DLOCKED_RECT lock;
     HRESULT hr;
     RECT s;
@@ -2158,25 +2161,86 @@ HRESULT WINAPI D3DXLoadSurfaceFromSurface(IDirect3DSurface9 *dst_surface,
     if (!dst_surface || !src_surface)
         return D3DERR_INVALIDCALL;

+
+    IDirect3DSurface9_GetDesc(src_surface, &src_desc);
+
+    if (!src_rect)
+    {
+        SetRect(&s, 0, 0, src_desc.Width, src_desc.Height);
+        src_rect = &s;
+    } else if (src_rect->left >= src_rect->right
+                || src_rect->top >= src_rect->bottom)
+    {
+        WARN("Invalid src_rect.\n");
+        return E_FAIL;
+    }
+
     if (!dst_palette && !src_palette && !color_key)
     {
-        switch (filter)
+        srcformatdesc = get_format_info(src_desc.Format);
+
+        src_size.width = src_rect->right - src_rect->left;
+        src_size.height = src_rect->bottom - src_rect->top;
+        src_size.depth = 1;
+
+        IDirect3DSurface9_GetDesc(dst_surface, &dst_desc);
+        destformatdesc = get_format_info(dst_desc.Format);
+        if (!dst_rect)
         {
-            case D3DX_FILTER_NONE:
-                d3d_filter = D3DTEXF_NONE;
-                break;
+            dst_rect = &dst_rect_temp;
+            dst_rect_temp.left = 0;
+            dst_rect_temp.top = 0;
+            dst_rect_temp.right = dst_desc.Width;
+            dst_rect_temp.bottom = dst_desc.Height;
+        }
+        else
+        {
+            if (dst_rect->left > dst_rect->right || dst_rect->right > dst_desc.Width
+                    || dst_rect->top > dst_rect->bottom || dst_rect->bottom > dst_desc.Height
+                    || dst_rect->left < 0 || dst_rect->top < 0)
+            {
+                WARN("Invalid dst_rect specified.\n");
+                return D3DERR_INVALIDCALL;
+            }
+            if (dst_rect->left == dst_rect->right || dst_rect->top == dst_rect->bottom)
+            {
+                WARN("Empty dst_rect specified.\n");
+                return D3D_OK;
+            }
+        }
+
+        dst_size.width = dst_rect->right - dst_rect->left;
+        dst_size.height = dst_rect->bottom - dst_rect->top;
+        dst_size.depth = 1;
+
+        if (src_desc.Format == dst_desc.Format
+                && dst_size.width == src_size.width
+                && dst_size.height == src_size.height
+                && color_key == 0
+                && !(src_rect->left & (srcformatdesc->block_width - 1))
+                && !(src_rect->top & (srcformatdesc->block_height - 1))
+                && !(dst_rect->left & (destformatdesc->block_width - 1))
+                && !(dst_rect->top & (destformatdesc->block_height - 1))) {
+            d3d_filter = D3DTEXF_NONE;
+        } else {
+            switch (filter)
+            {
+                case D3DX_FILTER_NONE:
+                    d3d_filter = D3DTEXF_NONE;
+                    break;

-            case D3DX_FILTER_POINT:
-                d3d_filter = D3DTEXF_POINT;
-                break;
+                case D3DX_FILTER_POINT:
+                    d3d_filter = D3DTEXF_POINT;
+                    break;

-            case D3DX_FILTER_LINEAR:
-                d3d_filter = D3DTEXF_LINEAR;
-                break;
+                case D3DX_FILTER_LINEAR:
+                    d3d_filter = D3DTEXF_LINEAR;
+                    break;

-            default:
-                d3d_filter = ~0u;
-                break;
+                default:
+                    d3d_filter = ~0u;
+                    break;
+            }
         }

if (d3d_filter != ~0u)
@@ -2189,14 +2253,6 @@ HRESULT WINAPI D3DXLoadSurfaceFromSurface(IDirect3DSurface9 *dst_surface,
         }
     }

-    IDirect3DSurface9_GetDesc(src_surface, &src_desc);
-
-    if (!src_rect)
-    {
-        SetRect(&s, 0, 0, src_desc.Width, src_desc.Height);
-        src_rect = &s;
-    }
-
     if (FAILED(lock_surface(src_surface, NULL, &lock, &temp_surface, FALSE)))
         return D3DXERR_INVALIDDATA;