fix blend options for image printer

Harley-xk · Oct 16, 2020 · 3b8b213 · 3b8b213
1 parent b08a4e5
commit 3b8b213
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Showing 2 changed files with 5 additions and 4 deletions.
diff --git a/MaLiang/Classes/Brush/Printer.swift b/MaLiang/Classes/Brush/Printer.swift
@@ -28,11 +28,12 @@ public final class Printer: Brush {
         attachment.isBlendingEnabled = true
 
         attachment.rgbBlendOperation = .add
-        attachment.sourceRGBBlendFactor = .one
-        attachment.destinationRGBBlendFactor = .oneMinusSourceAlpha
-
         attachment.alphaBlendOperation = .add
+
+        attachment.sourceRGBBlendFactor = .sourceAlpha
         attachment.sourceAlphaBlendFactor = .one
+
+        attachment.destinationRGBBlendFactor = .oneMinusSourceAlpha
         attachment.destinationAlphaBlendFactor = .oneMinusSourceAlpha
     }
 

diff --git a/MaLiang/Classes/MetalBase/MetalView.swift b/MaLiang/Classes/MetalBase/MetalView.swift
@@ -48,7 +48,7 @@ open class MetalView: MTKView {
 
     open override var backgroundColor: UIColor? {
         didSet {
-            clearColor = (backgroundColor ?? .white).toClearColor()
+            clearColor = (backgroundColor ?? .black).toClearColor()
         }
     }