[3/5] wined3d: Check more thoroughly if a stage references a texture

[H. Verbeet]

Changelog:
  - Check more thoroughly if a stage references a texture
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---

 dlls/wined3d/device.c |   33 ++++++++++++++++++++++++++++++++-
 1 files changed, 32 insertions(+), 1 deletions(-)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 1385c37..55b161d 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -3222,7 +3222,38 @@ static void device_update_fixed_function_usage_map(IWineD3DDeviceImpl *This) {
     int i;
 
     for (i = 0; i < MAX_TEXTURES; ++i) {
-        This->fixed_function_usage_map[i] = This->stateBlock->textures[i] ? TRUE : FALSE;
+        WINED3DTEXTUREOP color_op = This->stateBlock->textureState[i][WINED3DTSS_COLOROP];
+        WINED3DTEXTUREOP alpha_op = This->stateBlock->textureState[i][WINED3DTSS_ALPHAOP];
+        DWORD color_arg1 = This->stateBlock->textureState[i][WINED3DTSS_COLORARG1] & WINED3DTA_SELECTMASK;
+        DWORD color_arg2 = This->stateBlock->textureState[i][WINED3DTSS_COLORARG2] & WINED3DTA_SELECTMASK;
+        DWORD color_arg3 = This->stateBlock->textureState[i][WINED3DTSS_COLORARG0] & WINED3DTA_SELECTMASK;
+        DWORD alpha_arg1 = This->stateBlock->textureState[i][WINED3DTSS_ALPHAARG1] & WINED3DTA_SELECTMASK;
+        DWORD alpha_arg2 = This->stateBlock->textureState[i][WINED3DTSS_ALPHAARG2] & WINED3DTA_SELECTMASK;
+        DWORD alpha_arg3 = This->stateBlock->textureState[i][WINED3DTSS_ALPHAARG0] & WINED3DTA_SELECTMASK;
+
+        if (color_op == WINED3DTOP_DISABLE) {
+            /* Not used, and disable higher stages */
+            while (i < MAX_TEXTURES) {
+                This->fixed_function_usage_map[i] = FALSE;
+                ++i;
+            }
+            break;
+        }
+
+        if (((color_arg1 == WINED3DTA_TEXTURE) && color_op != WINED3DTOP_SELECTARG2)
+                || ((color_arg2 == WINED3DTA_TEXTURE) && color_op != WINED3DTOP_SELECTARG1)
+                || ((color_arg3 == WINED3DTA_TEXTURE) && (color_op == WINED3DTOP_MULTIPLYADD || color_op == WINED3DTOP_LERP))
+                || ((alpha_arg1 == WINED3DTA_TEXTURE) && alpha_op != WINED3DTOP_SELECTARG2)
+                || ((alpha_arg2 == WINED3DTA_TEXTURE) && alpha_op != WINED3DTOP_SELECTARG1)
+                || ((alpha_arg3 == WINED3DTA_TEXTURE) && (alpha_op == WINED3DTOP_MULTIPLYADD || alpha_op == WINED3DTOP_LERP))) {
+            This->fixed_function_usage_map[i] = TRUE;
+        } else {
+            This->fixed_function_usage_map[i] = FALSE;
+        }
+
+        if ((color_op == WINED3DTOP_BUMPENVMAP || color_op == WINED3DTOP_BUMPENVMAPLUMINANCE) && i < MAX_TEXTURES - 1) {
+            This->fixed_function_usage_map[i+1] = TRUE;
+        }
     }
 }