Windows cmake changes.

resources/icons/linux/linux-icons.sh

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+#!/usr/bin/env bash
+# $1: Input path to an image to use for generating icons.
+# Helper script to generate qtk's icons for Linux given a path to an input PNG.
+sudo apt install imagemagick
+
+convert "$1" -resize 256x256 kilroy-256.png
+convert "$1" -resize 128x128 kilroy-128.png
+convert "$1" -resize 64x64 kilroy-64.png
+convert "$1" -resize 48x48 kilroy-48.png
+convert "$1" -resize 32x32 kilroy-32.png
+convert "$1" -resize 16x16 kilroy-16.png

resources/icons/osx/osx-icons.sh

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+#!/usr/bin/env bash
+# $1: Input path to an image to use for generating icons.
+# Helper script to generate qtk's icons for OSX given a path to an input PNG.
+sudo apt install icnsutils imagemagick
+
+convert "$1" -resize 32x32 kilroy_32.png
+convert "$1" -resize 16x16 kilroy_16.png
+convert "$1" -resize 48x48 kilroy_48.png
+convert "$1" -resize 128x128 kilroy_128.png
+convert "$1" -resize 256x256 kilroy_256.png
+# For the application bundle in OSX.
+png2icns png2icns kilroy.icns kilroy_*.png
+
+# For the splash image in DMG installers.
+convert "$1" -resize 800x600! kilroy_splash.png

resources/icons/win/win-icons.sh

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+#!/usr/bin/env bash
+# $1: Input path to an image to use for generating icons.
+# Helper script to generate qtk's icons for OSX given a path to an input PNG.
+sudo apt install imagemagick
+
+# For the NSIS (un)installer executable shortcut icon.
+convert "$1" -resize 256x256,128x128,64x64,48x48,32x32,16x16 -background transparent -colors 256 kilroy.ico
+
+# For the NSIS installer splash screen.
+convert "$1" -resize 164x314! -background white -flatten kilroy_splash.bmp