d2d1: Implement d2d_radial_gradient_brush_GetCenter().

dlls/d2d1/brush.c

@@ -700,9 +700,11 @@ static void STDMETHODCALLTYPE d2d_radial_gradient_brush_SetRadiusY(ID2D1RadialGr
 static D2D1_POINT_2F * STDMETHODCALLTYPE d2d_radial_gradient_brush_GetCenter(ID2D1RadialGradientBrush *iface,
         D2D1_POINT_2F *centre)
 {
-    FIXME("iface %p, centre %p stub!\n", iface, centre);
+    struct d2d_brush *brush = impl_from_ID2D1RadialGradientBrush(iface);
+
+    TRACE("iface %p, centre %p.\n", iface, centre);
 
-    d2d_point_set(centre, 0.0f, 0.0f);
+    *centre = brush->u.radial.centre;
     return centre;
 }
 
@@ -758,7 +760,8 @@ static const struct ID2D1RadialGradientBrushVtbl d2d_radial_gradient_brush_vtbl
     d2d_radial_gradient_brush_GetGradientStopCollection,
 };
 
-HRESULT d2d_radial_gradient_brush_create(ID2D1Factory *factory, const D2D1_BRUSH_PROPERTIES *brush_desc,
+HRESULT d2d_radial_gradient_brush_create(ID2D1Factory *factory,
+        const D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES *gradient_desc, const D2D1_BRUSH_PROPERTIES *brush_desc,
         ID2D1GradientStopCollection *gradient, struct d2d_brush **brush)
 {
     struct d2d_brush *b;
@@ -767,6 +770,7 @@ HRESULT d2d_radial_gradient_brush_create(ID2D1Factory *factory, const D2D1_BRUSH
         return E_OUTOFMEMORY;
 
     d2d_brush_init(b, factory, D2D_BRUSH_TYPE_RADIAL, brush_desc, (ID2D1BrushVtbl *)&d2d_radial_gradient_brush_vtbl);
+    b->u.radial.centre = gradient_desc->center;
 
     TRACE("Created brush %p.\n", b);
     *brush = b;

dlls/d2d1/d2d1_private.h

@@ -241,6 +241,10 @@ struct d2d_brush
         } linear;
         struct
         {
+            D2D1_POINT_2F centre;
+        } radial;
+        struct
+        {
             struct d2d_bitmap *bitmap;
             D2D1_EXTEND_MODE extend_mode_x;
             D2D1_EXTEND_MODE extend_mode_y;
@@ -255,7 +259,8 @@ HRESULT d2d_solid_color_brush_create(ID2D1Factory *factory, const D2D1_COLOR_F *
 HRESULT d2d_linear_gradient_brush_create(ID2D1Factory *factory,
         const D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES *gradient_desc, const D2D1_BRUSH_PROPERTIES *brush_desc,
         ID2D1GradientStopCollection *gradient, struct d2d_brush **brush) DECLSPEC_HIDDEN;
-HRESULT d2d_radial_gradient_brush_create(ID2D1Factory *factory, const D2D1_BRUSH_PROPERTIES *brush_desc,
+HRESULT d2d_radial_gradient_brush_create(ID2D1Factory *factory,
+        const D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES *gradient_desc, const D2D1_BRUSH_PROPERTIES *brush_desc,
         ID2D1GradientStopCollection *gradient, struct d2d_brush **brush) DECLSPEC_HIDDEN;
 HRESULT d2d_bitmap_brush_create(ID2D1Factory *factory, ID2D1Bitmap *bitmap,
         const D2D1_BITMAP_BRUSH_PROPERTIES *bitmap_brush_desc, const D2D1_BRUSH_PROPERTIES *brush_desc,

dlls/d2d1/render_target.c

@@ -417,7 +417,7 @@ static HRESULT STDMETHODCALLTYPE d2d_d3d_render_target_CreateRadialGradientBrush
             iface, gradient_brush_desc, brush_desc, gradient, brush);
 
     if (SUCCEEDED(hr = d2d_radial_gradient_brush_create(render_target->factory,
-            brush_desc, gradient, &object)))
+            gradient_brush_desc, brush_desc, gradient, &object)))
         *brush = (ID2D1RadialGradientBrush *)&object->ID2D1Brush_iface;
 
     return hr;