[PATCH 1/5] d2d1/tests: Test DC content after an empty draw.

[Zhiyi Zhang]

From: Zhiyi Zhang

---
 dlls/d2d1/tests/d2d1.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/dlls/d2d1/tests/d2d1.c b/dlls/d2d1/tests/d2d1.c
index 665c3200e21..23144f0cbac 100644
--- a/dlls/d2d1/tests/d2d1.c
+++ b/dlls/d2d1/tests/d2d1.c
@@ -6024,6 +6024,34 @@ static void test_dc_target(BOOL d3d11)
     clr = GetPixel(hdc2, 0, 0);
     todo_wine ok(clr == RGB(0, 0, 255), "Got unexpected colour 0x%08lx.\n", clr);

+    /* DC content is retained after an empty draw */
+    hr = ID2D1DCRenderTarget_BindDC(rt, hdc, &rect);
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+
+    ID2D1DCRenderTarget_BeginDraw(rt);
+
+    set_color(&color, 1.0f, 0.0f, 0.0f, 1.0f);
+    ID2D1DCRenderTarget_Clear(rt, &color);
+
+    hr = ID2D1DCRenderTarget_EndDraw(rt, NULL, NULL);
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+
+    clr = GetPixel(hdc, 0, 0);
+    ok(clr == RGB(255, 0, 0), "Got unexpected colour 0x%08lx.\n", clr);
+
+    hr = ID2D1DCRenderTarget_BindDC(rt, hdc, &rect);
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+
+    clr = GetPixel(hdc, 0, 0);
+    ok(clr == RGB(255, 0, 0), "Got unexpected colour 0x%08lx.\n", clr);
+
+    ID2D1DCRenderTarget_BeginDraw(rt);
+    hr = ID2D1DCRenderTarget_EndDraw(rt, NULL, NULL);
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+
+    clr = GetPixel(hdc, 0, 0);
+    todo_wine ok(clr == RGB(255, 0, 0), "Got unexpected colour 0x%08lx.\n", clr);
+
     DeleteDC(hdc);
     DeleteDC(hdc2);
     ID2D1DCRenderTarget_Release(rt);