From 549f2e17b0fba1de43f36d3e0a6e8624623b939a Mon Sep 17 00:00:00 2001
From: treeform <starplant@gmail.com>
Date: Mon, 23 Nov 2020 17:11:47 -0800
Subject: [PATCH] Add sharpOpacity.

---
 src/pixie/images.nim | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/pixie/images.nim b/src/pixie/images.nim
index 2493279..e664edb 100644
--- a/src/pixie/images.nim
+++ b/src/pixie/images.nim
@@ -404,3 +404,15 @@ proc applyOpacity*(image: Image, opacity: float32): Image =
       var rgba = image.getRgbaUnsafe(x, y)
       rgba.a = ((rgba.a.uint32 * op.uint32) div 255).clamp(0, 255).uint8
       result.setRgbaUnsafe(x, y, rgba)
+
+proc sharpOpacity*(image: Image): Image =
+  ## Sharpens the opacity to extreme.
+  ## A = 0 stays 0. Anything else turns into 255.
+  result = newImageNoInit(image.width, image.height)
+  for y in 0 ..< image.height:
+    for x in 0 ..< image.width:
+      var rgba = image.getRgbaUnsafe(x, y)
+      if rgba.a == 0:
+        result.setRgbaUnsafe(x, y, rgba(0, 0, 0, 0))
+      else:
+        result.setRgbaUnsafe(x, y, rgba(255, 255, 255, 255))