ddraw/tests: Account for random WARP behavior in test_texturemapblend.

dlls/ddraw/tests/ddraw1.c

@@ -8390,6 +8390,20 @@ static void test_texturemapblend(void)
     emit_set_rs(&ptr, D3DRENDERSTATE_TEXTUREMAPBLEND, D3DTBLEND_MODULATE);
     emit_set_rs(&ptr, D3DRENDERSTATE_TEXTUREHANDLE, texture_handle);
 
+    /* SPECULARENABLE shouldn't matter in this test, but WARP begs to
+     * differ. In the event that color keying is randomly on (see comments
+     * in test_ck_default for reference), WARP will randomly discard
+     * fragments based on something, even though texture and diffuse color
+     * alpha components are non-zero. Setting SPECULARENABLE to FALSE
+     * prevents this in some cases - presumably WARP multiplies the
+     * specular color "alpha" channel into the final result and then
+     * alpha tests the result. Since the specular property normally does
+     * not have an alpha component the actual specular color we set in
+     * the vertex data above does not matter. Setting FOGENABLE = FALSE
+     * does not help either (specular alpha can contain a per-vertex fog
+     * factor. Doesn't seem to matter here). */
+    emit_set_rs(&ptr, D3DRENDERSTATE_SPECULARENABLE, FALSE);
+
     emit_tquad(&ptr, 0);
     emit_tquad(&ptr, 4);
     emit_end(&ptr);
@@ -8407,6 +8421,7 @@ static void test_texturemapblend(void)
     hr = IDirect3DDevice_EndScene(device);
     ok(SUCCEEDED(hr), "Failed to end scene, hr %#x.\n", hr);
 
+    /* The above SPECULARENABLE = FALSE on WARP matters here.*/
     color = get_surface_color(rt, 5, 5);
     ok(compare_color(color, 0x00000080, 2), "Got unexpected color 0x%08x.\n", color);
     color = get_surface_color(rt, 400, 5);
@@ -8476,14 +8491,25 @@ static void test_texturemapblend(void)
     hr = IDirect3DDevice_EndScene(device);
     ok(SUCCEEDED(hr), "Failed to end scene, hr %#x.\n", hr);
 
+    /* Despite our best efforts at not making color keying randomly triggering, those
+     * four broken() results occur every now and then on WARP. Presumably the non-
+     * existent alpha channel sometimes samples 0.0 instead of the expected 1.0. */
     color = get_surface_color(rt, 5, 5);
-    ok(compare_color(color, 0x000000ff, 2), "Got unexpected color 0x%08x.\n", color);
+    ok(compare_color(color, 0x000000ff, 2)
+            || broken(ddraw_is_warp(ddraw) && compare_color(color, 0x00000000, 2)),
+            "Got unexpected color 0x%08x.\n", color);
     color = get_surface_color(rt, 400, 5);
-    ok(compare_color(color, 0x000000ff, 2), "Got unexpected color 0x%08x.\n", color);
+    ok(compare_color(color, 0x000000ff, 2)
+            || broken(ddraw_is_warp(ddraw) && compare_color(color, 0x00000000, 2)),
+            "Got unexpected color 0x%08x.\n", color);
     color = get_surface_color(rt, 5, 245);
-    ok(compare_color(color, 0x00000080, 2), "Got unexpected color 0x%08x.\n", color);
+    ok(compare_color(color, 0x00000080, 2)
+            || broken(ddraw_is_warp(ddraw) && compare_color(color, 0x00000000, 2)),
+            "Got unexpected color 0x%08x.\n", color);
     color = get_surface_color(rt, 400, 245);
-    ok(compare_color(color, 0x00000080, 2), "Got unexpected color 0x%08x.\n", color);
+    ok(compare_color(color, 0x00000080, 2)
+            || broken(ddraw_is_warp(ddraw) && compare_color(color, 0x00000000, 2)),
+            "Got unexpected color 0x%08x.\n", color);
 
     IDirect3DTexture_Release(texture);
     ref = IDirectDrawSurface_Release(surface);