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feat: Custom App Icon #6

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feat: Custom App Icon #6

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9152baf
custom app icon
thororen1234 Oct 30, 2026
574d5ce
colors
thororen1234 Oct 31, 2026
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61 changes: 50 additions & 11 deletions ...d/patches/apps/discord/patch/src/main/kotlin/app/valenced/patches/discord/ValencedIcon.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,9 @@
package app.valenced.patches.discord

import app.reseam.patch.patch
import java.io.File

/** Discord's launcher icons, both adaptive icons over a channel colour. */
/** Discord's launcher icons, both adaptive icons over a channel color. */
private val LAUNCHER_ICONS = listOf(
"ic_logo_square", "ic_logo_round",
"ic_logo_square_beta", "ic_logo_round_beta",
Expand All @@ -14,14 +15,43 @@ private val LAUNCHER_ICONS = listOf(

private const val BACKGROUND = "valenced_icon_background"
private const val FOREGROUND = "valenced_icon_foreground"
private const val CUSTOM = "valenced_icon_custom"

private val RGB = Regex("#[0-9A-Fa-f]{6}")

val valencedIcon = patch("Valenced icon") {
description("Puts Discord's launcher icon on Valenced's cyan.")
description("Puts Discord's launcher icon on a color, Valenced's cyan by default, or replaces it with an image.")
compatibleWith(DISCORD)

val iconOption = pathOption(
"icon",
title = "Custom icon",
description = "The image to use as the launcher icon.",
)

val backgroundOption = stringOption(
"background",
title = "Background color",
description = "The color behind Discord's logo, such as #37EBFF.",
default = "#37EBFF",
)

val foregroundOption = stringOption(
"foreground",
title = "Logo color",
description = "The color of Discord's logo, such as #000000.",
default = "#000000",
)

execute {
resources.addColor(BACKGROUND, "#FF37EBFF")
resources.addColor(FOREGROUND, "#FF000000")
val custom = options.getOrNull(iconOption)?.let { File(it.path).readBytes() }
if (custom != null) {
resources.addColor(BACKGROUND, "#FF000000")
resources.addFile("drawable", CUSTOM, "res/$CUSTOM.png", custom)
} else {
resources.addColor(BACKGROUND, opaque(options[backgroundOption]))
resources.addColor(FOREGROUND, opaque(options[foregroundOption]))
}
for (icon in LAUNCHER_ICONS) {
// Some icons may not exist due to resource shrinking
if (!resources.exists("mipmap", icon)) continue
Expand All @@ -34,17 +64,26 @@ val valencedIcon = patch("Valenced icon") {
val background = findByTag("background").singleOrNull() ?: error("$path has no background layer")
background["android:drawable"] = "@color/$BACKGROUND"

// The foreground is a PNG mipmap shared with the rest of the app, so tint an inline
// copy rather than the mipmap itself. A layer without android:drawable inflates its child.
val foreground = findByTag("foreground").singleOrNull() ?: error("$path has no foreground layer")
val drawable = foreground["android:drawable"] ?: error("$path has no foreground drawable")
foreground.removeAttribute("android:drawable")
foreground.appendChild(createElement("bitmap").apply {
this["android:src"] = drawable
this["android:tint"] = "@color/$FOREGROUND"
})
if (custom != null) {
foreground["android:drawable"] = "@drawable/$CUSTOM"
} else {
// The foreground is a PNG mipmap shared with the rest of the app, so tint an inline
// copy rather than the mipmap itself. A layer without android:drawable inflates its child.
foreground.removeAttribute("android:drawable")
foreground.appendChild(createElement("bitmap").apply {
this["android:src"] = drawable
this["android:tint"] = "@color/$FOREGROUND"
})
}
}
}
}
}
}

private fun opaque(rgb: String): String {
require(RGB.matches(rgb)) { "$rgb isn't a color like #37EBFF" }
return "#FF" + rgb.substring(1)
}