Zhiyi Zhang : user32/tests: Add more display DC tests.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a47e2a5e1fffa1e8e02f7ea4738260b60aa3c13d
URL:    https://gitlab.winehq.org/wine/wine/-/commit/a47e2a5e1fffa1e8e02f7ea4738260b...

Author: Zhiyi Zhang 
Date:   Tue Dec 19 11:11:08 2023 +0800

user32/tests: Add more display DC tests.

Test that passing the bitmap object from display DCs to GetDIBits() should succeed.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54381

---

dlls/user32/tests/monitor.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/dlls/user32/tests/monitor.c b/dlls/user32/tests/monitor.c
index d172eb900df..ff9c6f47ed7 100644
--- a/dlls/user32/tests/monitor.c
+++ b/dlls/user32/tests/monitor.c
@@ -2227,6 +2227,9 @@ static void test_handles(void)
 #define check_display_dc(a, b, c) _check_display_dc(__LINE__, a, b, c)
 static void _check_display_dc(INT line, HDC hdc, const DEVMODEA *dm, BOOL allow_todo)
 {
+    unsigned char buffer[FIELD_OFFSET(BITMAPINFO, bmiColors[256])] = {0};
+    BITMAPINFO *bmi = (BITMAPINFO *)buffer;
+    DIBSECTION dib;
     BITMAP bitmap;
     HBITMAP hbmp;
     INT value;
@@ -2265,6 +2268,19 @@ static void _check_display_dc(INT line, HDC hdc, const DEVMODEA *dm, BOOL allow_

hbmp = GetCurrentObject(hdc, OBJ_BITMAP);
     ok_(__FILE__, line)(!!hbmp, "GetCurrentObject failed, error %#lx.\n", GetLastError());
+
+    /* Expect hbmp to be a bitmap, not a DIB when GetObjectA() succeeds */
+    value = GetObjectA(hbmp, sizeof(dib), &dib);
+    ok(!value || value == sizeof(BITMAP), "GetObjectA failed, value %d.\n", value);
+
+    /* Expect GetDIBits() to succeed */
+    bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+    value = GetDIBits(hdc, hbmp, 0, 0, NULL, (LPBITMAPINFO)bmi, DIB_RGB_COLORS);
+    todo_wine
+    ok(value, "GetDIBits failed, error %#lx.\n", GetLastError());
+    todo_wine
+    ok(bmi->bmiHeader.biCompression == BI_BITFIELDS, "Got unexpected biCompression %lu.\n", bmi->bmiHeader.biCompression);
+
     ret = GetObjectA(hbmp, sizeof(bitmap), &bitmap);
     /* GetObjectA fails on Win7 and older */
     if (ret)