gdiplus: Add tests for linear gradient preset blends.

dlls/gdiplus/tests/brush.c

@@ -395,8 +395,11 @@ static void test_lineblend(void)
     int i;
     const REAL factors[5] = {0.0f, 0.1f, 0.5f, 0.9f, 1.0f};
     const REAL positions[5] = {0.0f, 0.2f, 0.5f, 0.8f, 1.0f};
+    const REAL two_positions[2] = {0.0f, 1.0f};
+    const ARGB colors[5] = {0xff0000ff, 0xff00ff00, 0xff00ffff, 0xffff0000, 0xffffffff};
     REAL res_factors[6] = {0.3f, 0.0f, 0.0f, 0.0f, 0.0f};
     REAL res_positions[6] = {0.3f, 0.0f, 0.0f, 0.0f, 0.0f};
+    ARGB res_colors[6] = {0xdeadbeef, 0, 0, 0, 0};
 
     pt1.X = pt1.Y = 1.0;
     pt2.X = pt2.Y = 100.0;
@@ -489,6 +492,88 @@ static void test_lineblend(void)
     status = GdipGetLineBlend(brush, res_factors, res_positions, 1);
     expect(Ok, status);
 
+    status = GdipGetLinePresetBlendCount(NULL, &count);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlendCount(brush, NULL);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlendCount(brush, &count);
+    expect(Ok, status);
+    expect(0, count);
+
+    status = GdipGetLinePresetBlend(NULL, res_colors, res_positions, 1);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, NULL, res_positions, 1);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, NULL, 1);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 0);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, -1);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 1);
+    expect(InvalidParameter, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 2);
+    expect(GenericError, status);
+
+    status = GdipSetLinePresetBlend(NULL, colors, positions, 5);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, NULL, positions, 5);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, NULL, 5);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, positions, 0);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, positions, -1);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, positions, 1);
+    expect(InvalidParameter, status);
+
+    /* leave off the 0.0 position */
+    status = GdipSetLinePresetBlend(brush, &colors[1], &positions[1], 4);
+    expect(InvalidParameter, status);
+
+    /* leave off the 1.0 position */
+    status = GdipSetLinePresetBlend(brush, colors, positions, 4);
+    expect(InvalidParameter, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, positions, 5);
+    expect(Ok, status);
+
+    status = GdipGetLinePresetBlendCount(brush, &count);
+    expect(Ok, status);
+    expect(5, count);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 4);
+    expect(InsufficientBuffer, status);
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 5);
+    expect(Ok, status);
+
+    for (i=0; i<5; i++)
+    {
+        expect(colors[i], res_colors[i]);
+        expectf(positions[i], res_positions[i]);
+    }
+
+    status = GdipGetLinePresetBlend(brush, res_colors, res_positions, 6);
+    expect(Ok, status);
+
+    status = GdipSetLinePresetBlend(brush, colors, two_positions, 2);
+    expect(Ok, status);
+
     status = GdipDeleteBrush((GpBrush*)brush);
     expect(Ok, status);
 }

include/gdiplusflat.h

@@ -412,6 +412,10 @@ GpStatus WINGDIPAPI GdipSetLineBlend(GpLineGradient*,GDIPCONST REAL*,
     GDIPCONST REAL*,INT);
 GpStatus WINGDIPAPI GdipGetLineBlend(GpLineGradient*,REAL*,REAL*,INT);
 GpStatus WINGDIPAPI GdipGetLineBlendCount(GpLineGradient*,INT*);
+GpStatus WINGDIPAPI GdipSetLinePresetBlend(GpLineGradient*,GDIPCONST ARGB*,
+    GDIPCONST REAL*,INT);
+GpStatus WINGDIPAPI GdipGetLinePresetBlend(GpLineGradient*,ARGB*,REAL*,INT);
+GpStatus WINGDIPAPI GdipGetLinePresetBlendCount(GpLineGradient*,INT*);
 GpStatus WINGDIPAPI GdipSetLineColors(GpLineGradient*,ARGB,ARGB);
 GpStatus WINGDIPAPI GdipSetLineGammaCorrection(GpLineGradient*,BOOL);
 GpStatus WINGDIPAPI GdipSetLineSigmaBlend(GpLineGradient*,REAL,REAL);