gdiplus: Implemented GdipIsEmptyClip with tests.

dlls/gdiplus/gdiplus.spec

@@ -414,7 +414,7 @@
 @ stub GdipImageSetAbort
 @ stub GdipInitializePalette
 @ stdcall GdipInvertMatrix(ptr)
-@ stub GdipIsClipEmpty
+@ stdcall GdipIsClipEmpty(ptr ptr)
 @ stdcall GdipIsEmptyRegion(ptr ptr ptr)
 @ stdcall GdipIsEqualRegion(ptr ptr ptr ptr)
 @ stdcall GdipIsInfiniteRegion(ptr ptr ptr)

dlls/gdiplus/graphics.c

@@ -2392,6 +2392,14 @@ GpStatus WINGDIPAPI GdipGetWorldTransform(GpGraphics *graphics, GpMatrix *matrix
     return Ok;
 }
 
+GpStatus WINGDIPAPI GdipIsClipEmpty(GpGraphics *graphics, BOOL *res)
+{
+    if(!graphics || !res)
+        return InvalidParameter;
+
+    return GdipIsEmptyRegion(graphics->clip, graphics, res);
+}
+
 GpStatus WINGDIPAPI GdipMeasureCharacterRanges(GpGraphics* graphics,
         GDIPCONST WCHAR* string, INT length, GDIPCONST GpFont* font,
         GDIPCONST RectF* layoutRect, GDIPCONST GpStringFormat *stringFormat,

dlls/gdiplus/tests/graphics.c

@@ -844,6 +844,40 @@ static void test_get_set_clip(void)
     ReleaseDC(0, hdc);
 }
 
+static void test_isempty(void)
+{
+    GpStatus status;
+    GpGraphics *graphics = NULL;
+    HDC hdc = GetDC(0);
+    GpRegion *clip;
+    BOOL res;
+
+    status = GdipCreateFromHDC(hdc, &graphics);
+    expect(Ok, status);
+
+    status = GdipCreateRegion(&clip);
+    expect(Ok, status);
+
+    /* NULL */
+    status = GdipIsClipEmpty(NULL, NULL);
+    expect(InvalidParameter, status);
+    status = GdipIsClipEmpty(graphics, NULL);
+    expect(InvalidParameter, status);
+    status = GdipIsClipEmpty(NULL, &res);
+    expect(InvalidParameter, status);
+
+    /* default is infinite */
+    res = TRUE;
+    status = GdipIsClipEmpty(graphics, &res);
+    expect(Ok, status);
+    expect(FALSE, res);
+
+    GdipDeleteRegion(clip);
+
+    GdipDeleteGraphics(graphics);
+    ReleaseDC(0, hdc);
+}
+
 START_TEST(graphics)
 {
     struct GdiplusStartupInput gdiplusStartupInput;
@@ -866,6 +900,7 @@ START_TEST(graphics)
     test_Get_Release_DC();
     test_transformpoints();
     test_get_set_clip();
+    test_isempty();
 
     GdiplusShutdown(gdiplusToken);
 }

include/gdiplusflat.h

@@ -158,6 +158,7 @@ GpStatus WINGDIPAPI GdipGetCompositingMode(GpGraphics*,CompositingMode*);
 GpStatus WINGDIPAPI GdipGetClip(GpGraphics*,GpRegion*);
 GpStatus WINGDIPAPI GdipSetClipRegion(GpGraphics*,GpRegion*,CombineMode);
 GpStatus WINGDIPAPI GdipResetClip(GpGraphics*);
+GpStatus WINGDIPAPI GdipIsClipEmpty(GpGraphics*, BOOL*);
 GpStatus WINGDIPAPI GdipGetCompositingQuality(GpGraphics*,CompositingQuality*);
 GpStatus WINGDIPAPI GdipGetDC(GpGraphics*,HDC*);
 GpStatus WINGDIPAPI GdipGetImageDimension(GpImage*,REAL*,REAL*);