gdiplus: Implement GdipSetLineLinearBlend.

dlls/gdiplus/brush.c

@@ -1531,12 +1531,33 @@ GpStatus WINGDIPAPI GdipRotateTextureTransform(GpTexture* brush, REAL angle,
 GpStatus WINGDIPAPI GdipSetLineLinearBlend(GpLineGradient *brush, REAL focus,
     REAL scale)
 {
-    static int calls;
+    REAL factors[3];
+    REAL positions[3];
+    int num_points = 0;
 
-    if(!(calls++))
+    TRACE("(%p,%.2f,%.2f)\n", brush, focus, scale);
-        FIXME("not implemented\n");
 
-    return NotImplemented;
+    if (!brush) return InvalidParameter;
+
+    if (focus != 0.0)
+    {
+        factors[num_points] = 0.0;
+        positions[num_points] = 0.0;
+        num_points++;
+    }
+
+    factors[num_points] = scale;
+    positions[num_points] = focus;
+    num_points++;
+
+    if (focus != 1.0)
+    {
+        factors[num_points] = 0.0;
+        positions[num_points] = 1.0;
+        num_points++;
+    }
+
+    return GdipSetLineBlend(brush, factors, positions, num_points);
 }
 
 GpStatus WINGDIPAPI GdipSetLinePresetBlend(GpLineGradient *brush,

dlls/gdiplus/tests/brush.c

@@ -493,6 +493,71 @@ static void test_lineblend(void)
     expect(Ok, status);
 }
 
+static void test_linelinearblend(void)
+{
+    GpLineGradient *brush;
+    GpStatus status;
+    GpPointF pt1, pt2;
+    INT count=10;
+    REAL res_factors[3] = {0.3f};
+    REAL res_positions[3] = {0.3f};
+
+    status = GdipSetLineLinearBlend(NULL, 0.6, 0.8);
+    expect(InvalidParameter, status);
+
+    pt1.X = pt1.Y = 1.0;
+    pt2.X = pt2.Y = 100.0;
+    status = GdipCreateLineBrush(&pt1, &pt2, 0, 0, WrapModeTile, &brush);
+    expect(Ok, status);
+
+
+    status = GdipSetLineLinearBlend(brush, 0.6, 0.8);
+    expect(Ok, status);
+
+    status = GdipGetLineBlendCount(brush, &count);
+    expect(Ok, status);
+    expect(3, count);
+
+    status = GdipGetLineBlend(brush, res_factors, res_positions, 3);
+    expect(Ok, status);
+    expectf(0.0, res_factors[0]);
+    expectf(0.0, res_positions[0]);
+    expectf(0.8, res_factors[1]);
+    expectf(0.6, res_positions[1]);
+    expectf(0.0, res_factors[2]);
+    expectf(1.0, res_positions[2]);
+
+
+    status = GdipSetLineLinearBlend(brush, 0.0, 0.8);
+    expect(Ok, status);
+
+    status = GdipGetLineBlendCount(brush, &count);
+    expect(Ok, status);
+    expect(2, count);
+
+    status = GdipGetLineBlend(brush, res_factors, res_positions, 3);
+    expect(Ok, status);
+    expectf(0.8, res_factors[0]);
+    expectf(0.0, res_positions[0]);
+    expectf(0.0, res_factors[1]);
+    expectf(1.0, res_positions[1]);
+
+
+    status = GdipSetLineLinearBlend(brush, 1.0, 0.8);
+    expect(Ok, status);
+
+    status = GdipGetLineBlendCount(brush, &count);
+    expect(Ok, status);
+    expect(2, count);
+
+    status = GdipGetLineBlend(brush, res_factors, res_positions, 3);
+    expect(Ok, status);
+    expectf(0.0, res_factors[0]);
+    expectf(0.0, res_positions[0]);
+    expectf(0.8, res_factors[1]);
+    expectf(1.0, res_positions[1]);
+}
+
 START_TEST(brush)
 {
     struct GdiplusStartupInput gdiplusStartupInput;
@@ -515,6 +580,7 @@ START_TEST(brush)
     test_texturewrap();
     test_gradientgetrect();
     test_lineblend();
+    test_linelinearblend();
 
     GdiplusShutdown(gdiplusToken);
 }

include/gdiplusflat.h

@@ -409,6 +409,7 @@ GpStatus WINGDIPAPI GdipGetLineBlendCount(GpLineGradient*,INT*);
 GpStatus WINGDIPAPI GdipSetLineColors(GpLineGradient*,ARGB,ARGB);
 GpStatus WINGDIPAPI GdipSetLineGammaCorrection(GpLineGradient*,BOOL);
 GpStatus WINGDIPAPI GdipSetLineSigmaBlend(GpLineGradient*,REAL,REAL);
+GpStatus WINGDIPAPI GdipSetLineLinearBlend(GpLineGradient*,REAL,REAL);
 GpStatus WINGDIPAPI GdipSetLineWrapMode(GpLineGradient*,GpWrapMode);
 
 /* Matrix */