Add a test showing that SaveDC after GetDC should return 1.

dlls/gdi/tests/dc.c

@@ -2,6 +2,7 @@
  * Unit tests for dc functions
  *
  * Copyright (c) 2005 Huw Davies
+ * Copyright (c) 2005 Dmitry Timoshkov
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -20,7 +21,6 @@
 
 #include <assert.h>
 #include <stdio.h>
-#include <math.h>
 
 #include "wine/test.h"
 #include "winbase.h"
@@ -28,8 +28,99 @@
 #include "winuser.h"
 #include "winerror.h"
 
+static void dump_region(HRGN hrgn)
+{
+    DWORD i, size;
+    RGNDATA *data = NULL;
+    RECT *rect;
 
-void test_savedc(void)
+    if (!hrgn)
+    {
+        printf( "(null) region\n" );
+        return;
+    }
+    if (!(size = GetRegionData( hrgn, 0, NULL ))) return;
+    if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return;
+    GetRegionData( hrgn, size, data );
+    printf( "%ld rects:", data->rdh.nCount );
+    for (i = 0, rect = (RECT *)data->Buffer; i < data->rdh.nCount; i++, rect++)
+        printf( " (%ld,%ld)-(%ld,%ld)", rect->left, rect->top, rect->right, rect->bottom );
+    printf( "\n" );
+    HeapFree( GetProcessHeap(), 0, data );
+}
+
+static void test_savedc_2(void)
+{
+    HWND hwnd;
+    HDC hdc;
+    HRGN hrgn;
+    RECT rc, rc_clip;
+    int ret;
+
+    hwnd = CreateWindowExA(0, "static", "", WS_POPUP, 0,0,100,100,
+                           0, 0, 0, NULL);
+    assert(hwnd != 0);
+    ShowWindow(hwnd, SW_SHOW);
+    UpdateWindow(hwnd);
+
+    hrgn = CreateRectRgn(0, 0, 0, 0);
+    assert(hrgn != 0);
+
+    hdc = GetDC(hwnd);
+    ok(hdc != NULL, "CreateDC rets %p\n", hdc);
+
+    ret = GetClipBox(hdc, &rc_clip);
+    ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
+    ret = GetClipRgn(hdc, hrgn);
+    ok(ret == 0, "GetClipRgn returned %d instead of 0\n", ret);
+    ret = GetRgnBox(hrgn, &rc);
+    ok(ret == NULLREGION, "GetRgnBox returned %d (%ld,%ld-%ld,%ld) instead of NULLREGION\n",
+       ret, rc.left, rc.top, rc.right, rc.bottom);
+    /*dump_region(hrgn);*/
+    SetRect(&rc, 0, 0, 100, 100);
+    ok(EqualRect(&rc, &rc_clip),
+       "rects are not equal: (%ld,%ld-%ld,%ld) - (%ld,%ld-%ld,%ld)\n",
+       rc.left, rc.top, rc.right, rc.bottom,
+       rc_clip.left, rc_clip.top, rc_clip.right, rc_clip.bottom);
+
+    ret = SaveDC(hdc);
+todo_wine
+{
+    ok(ret == 1, "ret = %d\n", ret);
+}
+
+    ret = IntersectClipRect(hdc, 0, 0, 50, 50);
+#if 0  /* XP returns COMPLEXREGION although dump_region reports only 1 rect */
+    ok(ret == SIMPLEREGION, "IntersectClipRect returned %d instead of SIMPLEREGION\n", ret);
+#endif
+    if (ret != SIMPLEREGION)
+    {
+        trace("Windows BUG: IntersectClipRect returned %d instead of SIMPLEREGION\n", ret);
+        /* let's make sure that it's a simple region */
+        ret = GetClipRgn(hdc, hrgn);
+        ok(ret == 1, "GetClipRgn returned %d instead of 1\n", ret);
+        dump_region(hrgn);
+    }
+
+    ret = GetClipBox(hdc, &rc_clip);
+    ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
+    SetRect(&rc, 0, 0, 50, 50);
+    ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
+
+    ret = RestoreDC(hdc, 1);
+    ok(ret, "ret = %d\n", ret);
+
+    ret = GetClipBox(hdc, &rc_clip);
+    ok(ret == SIMPLEREGION, "GetClipBox returned %d instead of SIMPLEREGION\n", ret);
+    SetRect(&rc, 0, 0, 100, 100);
+    ok(EqualRect(&rc, &rc_clip), "rects are not equal\n");
+
+    DeleteObject(hrgn);
+    ReleaseDC(hwnd, hdc);
+    DestroyWindow(hwnd);
+}
+
+static void test_savedc(void)
 {
     HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
     int ret;
@@ -85,4 +176,5 @@ void test_savedc(void)
 START_TEST(dc)
 {
     test_savedc();
+    test_savedc_2();
 }