gdiplus: Implemented GdipGraphicsClear.

dlls/gdiplus/gdiplus.spec

@@ -403,7 +403,7 @@
 @ stub GdipGetVisibleClipBounds
 @ stub GdipGetVisibleClipBoundsI
 @ stdcall GdipGetWorldTransform(ptr ptr)
-@ stub GdipGraphicsClear
+@ stdcall GdipGraphicsClear(ptr long)
 @ stub GdipGraphicsSetAbort
 @ stub GdipImageForceValidation
 @ stdcall GdipImageGetFrameCount(ptr ptr ptr)

dlls/gdiplus/graphics.c

@@ -2538,6 +2538,41 @@ GpStatus WINGDIPAPI GdipGetWorldTransform(GpGraphics *graphics, GpMatrix *matrix
     return Ok;
 }
 
+GpStatus WINGDIPAPI GdipGraphicsClear(GpGraphics *graphics, ARGB color)
+{
+    GpSolidFill *brush;
+    GpStatus stat;
+    RECT rect;
+
+    TRACE("(%p, %x)\n", graphics, color);
+
+    if(!graphics)
+        return InvalidParameter;
+
+    if(graphics->busy)
+        return ObjectBusy;
+
+    if((stat = GdipCreateSolidFill(color, &brush)) != Ok)
+        return stat;
+
+    if(graphics->hwnd){
+        if(!GetWindowRect(graphics->hwnd, &rect)){
+            GdipDeleteBrush((GpBrush*)brush);
+            return GenericError;
+        }
+
+        GdipFillRectangle(graphics, (GpBrush*)brush, 0.0, 0.0, (REAL)(rect.right  - rect.left),
+                                                               (REAL)(rect.bottom - rect.top));
+    }
+    else
+        GdipFillRectangle(graphics, (GpBrush*)brush, 0.0, 0.0, (REAL)GetDeviceCaps(graphics->hdc, HORZRES),
+                                                               (REAL)GetDeviceCaps(graphics->hdc, VERTRES));
+
+    GdipDeleteBrush((GpBrush*)brush);
+
+    return Ok;
+}
+
 GpStatus WINGDIPAPI GdipIsClipEmpty(GpGraphics *graphics, BOOL *res)
 {
     TRACE("(%p, %p)\n", graphics, res);

dlls/gdiplus/tests/graphics.c

@@ -672,6 +672,8 @@ static void test_Get_Release_DC(void)
     expect(ObjectBusy, status); status = Ok;
     status = GdipGetWorldTransform(graphics, m);
     expect(ObjectBusy, status); status = Ok;
+    status = GdipGraphicsClear(graphics, 0xdeadbeef);
+    expect(ObjectBusy, status); status = Ok;
     /* GdipMeasureCharacterRanges */
     /* GdipMeasureString */
     status = GdipResetClip(graphics);
@@ -878,6 +880,14 @@ static void test_isempty(void)
     ReleaseDC(0, hdc);
 }
 
+static void test_clear(void)
+{
+    GpStatus status;
+
+    status = GdipGraphicsClear(NULL, 0xdeadbeef);
+    expect(InvalidParameter, status);
+}
+
 START_TEST(graphics)
 {
     struct GdiplusStartupInput gdiplusStartupInput;
@@ -901,6 +911,7 @@ START_TEST(graphics)
     test_transformpoints();
     test_get_set_clip();
     test_isempty();
+    test_clear();
 
     GdiplusShutdown(gdiplusToken);
 }

include/gdiplusflat.h

@@ -169,6 +169,7 @@ GpStatus WINGDIPAPI GdipGetPixelOffsetMode(GpGraphics*,PixelOffsetMode*);
 GpStatus WINGDIPAPI GdipGetSmoothingMode(GpGraphics*,SmoothingMode*);
 GpStatus WINGDIPAPI GdipGetTextRenderingHint(GpGraphics*,TextRenderingHint*);
 GpStatus WINGDIPAPI GdipGetWorldTransform(GpGraphics*,GpMatrix*);
+GpStatus WINGDIPAPI GdipGraphicsClear(GpGraphics*,ARGB);
 GpStatus WINGDIPAPI GdipMeasureString(GpGraphics*,GDIPCONST WCHAR*,INT,
     GDIPCONST GpFont*,GDIPCONST RectF*,GDIPCONST GpStringFormat*,RectF*,INT*,INT*);
 GpStatus WINGDIPAPI GdipMeasureCharacterRanges(GpGraphics*, GDIPCONST WCHAR*,