gdiplus: Implement GdipDrawLinesI based on GdipDrawLines.

dlls/gdiplus/gdiplus.spec

@@ -188,7 +188,7 @@
 @ stdcall GdipDrawLine(ptr ptr long long long long)
 @ stdcall GdipDrawLineI(ptr ptr long long long long)
 @ stdcall GdipDrawLines(ptr ptr ptr long)
-@ stub GdipDrawLinesI
+@ stdcall GdipDrawLinesI(ptr ptr ptr long)
 @ stdcall GdipDrawPath(ptr ptr ptr)
 @ stdcall GdipDrawPie(ptr ptr long long long long long long)
 @ stub GdipDrawPieI

dlls/gdiplus/graphics.c

@@ -1224,6 +1224,35 @@ GpStatus WINGDIPAPI GdipDrawLines(GpGraphics *graphics, GpPen *pen, GDIPCONST
     return retval;
 }
 
+GpStatus WINGDIPAPI GdipDrawLinesI(GpGraphics *graphics, GpPen *pen, GDIPCONST
+    GpPoint *points, INT count)
+{
+    INT save_state;
+    GpStatus retval;
+    GpPointF *ptf = NULL;
+    int i;
+
+    if(!pen || !graphics || (count < 2))
+        return InvalidParameter;
+
+    ptf = GdipAlloc(count * sizeof(GpPointF));
+    if(!ptf) return OutOfMemory;
+
+    for(i = 0; i < count; i ++){
+        ptf[i].X = (REAL) points[i].X;
+        ptf[i].Y = (REAL) points[i].Y;
+    }
+
+    save_state = prepare_dc(graphics, pen);
+
+    retval = draw_polyline(graphics, pen, ptf, count, TRUE);
+
+    restore_dc(graphics, save_state);
+
+    GdipFree(ptf);
+    return retval;
+}
+
 GpStatus WINGDIPAPI GdipDrawPath(GpGraphics *graphics, GpPen *pen, GpPath *path)
 {
     INT save_state;

dlls/gdiplus/tests/graphics.c

@@ -384,6 +384,58 @@ static void test_GdipDrawLineI(void)
     ReleaseDC(0, hdc);
 }
 
+static void test_GdipDrawLinesI(void)
+{
+    GpStatus status;
+    GpGraphics *graphics = NULL;
+    GpPen *pen = NULL;
+    GpPoint *ptf = NULL;
+    HDC hdc = GetDC(0);
+
+    /* make a graphics object and pen object */
+    status = GdipCreateFromHDC(hdc, &graphics);
+    expect(Ok, status);
+    ok(hdc != NULL, "Expected HDC to be initialized\n");
+
+    status = GdipCreateFromHDC(hdc, &graphics);
+    expect(Ok, status);
+    ok(graphics != NULL, "Expected graphics to be initialized\n");
+
+    status = GdipCreatePen1((ARGB)0xffff00ff, 10.0f, UnitPixel, &pen);
+    expect(Ok, status);
+    ok(pen != NULL, "Expected pen to be initialized\n");
+
+    /* make some arbitrary valid points*/
+    ptf = GdipAlloc(2 * sizeof(GpPointF));
+
+    ptf[0].X = 1;
+    ptf[0].Y = 1;
+
+    ptf[1].X = 2;
+    ptf[1].Y = 2;
+
+    /* InvalidParameter cases: null graphics, null pen, null points, count < 2*/
+    status = GdipDrawLinesI(NULL, NULL, NULL, 0);
+    expect(InvalidParameter, status);
+
+    status = GdipDrawLinesI(graphics, pen, ptf, 0);
+    expect(InvalidParameter, status);
+
+    status = GdipDrawLinesI(graphics, NULL, ptf, 2);
+    expect(InvalidParameter, status);
+
+    status = GdipDrawLinesI(NULL, pen, ptf, 2);
+    expect(InvalidParameter, status);
+
+    /* successful case */
+    status = GdipDrawLinesI(graphics, pen, ptf, 2);
+    expect(Ok, status);
+
+    GdipFree(ptf);
+    GdipDeletePen(pen);
+    ReleaseDC(0, hdc);
+}
+
 START_TEST(graphics)
 {
     struct GdiplusStartupInput gdiplusStartupInput;
@@ -402,6 +454,7 @@ START_TEST(graphics)
     test_GdipDrawArc();
     test_GdipDrawArcI();
     test_GdipDrawLineI();
+    test_GdipDrawLinesI();
 
     GdiplusShutdown(gdiplusToken);
 }