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Update to latest SkShadowUtils::DrawShadow() (#4705)

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Jim Van Verth 2018-02-27 12:42:23 -05:00 committed by Brian Osman
parent bacb388fda
commit ae3f7ea9d4
1 changed files with 13 additions and 3 deletions
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16
flow/layers/physical_shape_layer.cc
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@ -108,15 +108,25 @@ void PhysicalShapeLayer::DrawShadow(SkCanvas* canvas,
float elevation,
bool transparentOccluder,
SkScalar dpr) {
const SkScalar kAmbientAlpha = 0.039f;
const SkScalar kSpotAlpha = 0.25f;
const SkScalar kLightHeight = 600;
const SkScalar kLightRadius = 800;
SkShadowFlags flags = transparentOccluder
? SkShadowFlags::kTransparentOccluder_ShadowFlag
: SkShadowFlags::kNone_ShadowFlag;
const SkRect& bounds = path.getBounds();
SkScalar shadow_x = (bounds.left() + bounds.right()) / 2;
SkScalar shadow_y = bounds.top() - 600.0f;
SkShadowUtils::DrawShadow(canvas, path, dpr * elevation,
SkPoint3::Make(shadow_x, shadow_y, dpr * 600.0f),
dpr * 800.0f, 0.039f, 0.25f, color, flags);
SkColor inAmbient = SkColorSetA(color, kAmbientAlpha * SkColorGetA(color));
SkColor inSpot = SkColorSetA(color, kSpotAlpha * SkColorGetA(color));
SkColor ambientColor, spotColor;
SkShadowUtils::ComputeTonalColors(inAmbient, inSpot,
&ambientColor, &spotColor);
SkShadowUtils::DrawShadow(canvas, path, SkPoint3::Make(0, 0, dpr * elevation),
SkPoint3::Make(shadow_x, shadow_y, dpr * kLightHeight),
dpr * kLightRadius, ambientColor, spotColor, flags);
}
} // namespace flow