gdiplus: Implemented GdipSetLineColors.

dlls/gdiplus/brush.c

@@ -675,12 +675,13 @@ GpStatus WINGDIPAPI GdipSetTextureTransform(GpTexture *texture,
 GpStatus WINGDIPAPI GdipSetLineColors(GpLineGradient *brush, ARGB color1,
     ARGB color2)
 {
-    static int calls;
+    if(!brush)
+        return InvalidParameter;
 
-    if(!(calls++))
-        FIXME("not implemented\n");
+    brush->startcolor = color1;
+    brush->endcolor   = color2;
 
-    return NotImplemented;
+    return Ok;
 }
 
 GpStatus WINGDIPAPI GdipGetLineColors(GpLineGradient *brush, ARGB *colors)

include/gdiplusflat.h

@@ -175,6 +175,7 @@ GpStatus WINGDIPAPI GdipSetLineBlend(GpLineGradient*,GDIPCONST REAL*,
 GpStatus WINGDIPAPI GdipSetLineGammaCorrection(GpLineGradient*,BOOL);
 GpStatus WINGDIPAPI GdipSetLineSigmaBlend(GpLineGradient*,REAL,REAL);
 GpStatus WINGDIPAPI GdipSetLineWrapMode(GpLineGradient*,GpWrapMode);
+GpStatus WINGDIPAPI GdipSetLineColors(GpLineGradient*,ARGB,ARGB);
 GpStatus WINGDIPAPI GdipSetPathGradientCenterColor(GpPathGradient*,ARGB);
 GpStatus WINGDIPAPI GdipSetPathGradientCenterPoint(GpPathGradient*,GpPointF*);
 GpStatus WINGDIPAPI GdipSetPathGradientFocusScales(GpPathGradient*,REAL,REAL);