[PATCH 4/5] wined3d: Optimize scanning changed transform states in wined3d_device_apply_stateblock().

[Matteo Bruni]

Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
---
 dlls/wined3d/device.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 87684dc1c46..d8992424797 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -3889,7 +3889,8 @@ void CDECL wined3d_device_apply_stateblock(struct wined3d_device *device,
 {
     const struct wined3d_d3d_info *d3d_info = &stateblock->device->adapter->d3d_info;
     const struct wined3d_stateblock_state *state = &stateblock->stateblock_state;
-    unsigned int i, j;
+    const unsigned int word_bit_count = sizeof(DWORD) * CHAR_BIT;
+    unsigned int i, j, idx;
     DWORD map;
 
     TRACE("device %p, stateblock %p.\n", device, stateblock);
@@ -3968,10 +3969,15 @@ void CDECL wined3d_device_apply_stateblock(struct wined3d_device *device,
         }
     }
 
-    for (i = 0; i < ARRAY_SIZE(state->transforms); ++i)
+    for (i = 0; i < ARRAY_SIZE(stateblock->changed.transform); ++i)
     {
-        if (stateblock->changed.transform[i >> 5] & (1u << (i & 0x1f)))
-            wined3d_device_set_transform(device, i, &state->transforms[i]);
+        map = stateblock->changed.transform[i];
+        while (map)
+        {
+            j = wined3d_bit_scan(&map);
+            idx = i * word_bit_count + j;
+            wined3d_device_set_transform(device, idx, &state->transforms[idx]);
+        }
     }
 
     if (stateblock->changed.indices)
-- 
2.24.1