Merge pull request #29 from swhitty/flip-CGImage

Flip CGImage

Author: swhitty

Samples.bundle/base64.svg

@@ -557,7 +557,11 @@ public final class CGTextRenderer: Renderer {
   }
 
   func draw(image: LayerTree.Image) {
+    lines.append("ctx.saveGState()")
+    lines.append("ctx.translateBy(x: 0, y: image.height)")
+    lines.append("ctx.scaleBy(x: 1, y: -1)")
     lines.append("ctx.draw(image, in: CGRect(x: 0, y: 0, width: image.width, height: image.height)")
+    lines.append("ctx.restoreGState()")
   }
 
   func draw(linear gradient: LayerTree.Gradient, from start: String, to end: String) {

Samples.bundle/shapes.svg

@@ -77,6 +77,7 @@ final class CGTransformingPattern: Equatable {
 }
 
 struct CGProvider: RendererTypeProvider {
+  
     typealias Types = CGTypes
 
     func createFloat(from float: LayerTree.Float) -> CGFloat {
@@ -412,8 +413,12 @@ struct CGRenderer: Renderer {
     }
 
     func draw(image: CGImage) {
-        let rect = CGRect(x: 0, y: 0, width: image.width, height: image.height)
-        ctx.draw(image, in: rect)
+      let rect = CGRect(x: 0, y: 0, width: image.width, height: image.height)
+      pushState()
+      translate(tx: 0, ty: rect.height)
+      scale(sx: 1, sy: -1)
+      ctx.draw(image, in: rect)
+      popState()
     }
 
     func draw(linear gradient: CGGradient, from start: CGPoint, to end: CGPoint) {