From 18350dc9a2876145bf9b73e05c4f042dd0f0c2ad Mon Sep 17 00:00:00 2001
From: Martin Gerhardy <martin.gerhardy@gmail.com>
Date: Sun, 22 May 2022 23:19:33 +0200
Subject: [PATCH] VOXEL: allow to save the palette glow color to png

---
 src/modules/voxel/Palette.cpp | 15 +++++++++++++++
 src/modules/voxel/Palette.h   |  1 +
 2 files changed, 16 insertions(+)

diff --git a/src/modules/voxel/Palette.cpp b/src/modules/voxel/Palette.cpp
index 090078611..f0f4baf8f 100644
--- a/src/modules/voxel/Palette.cpp
+++ b/src/modules/voxel/Palette.cpp
@@ -132,6 +132,21 @@ bool Palette::save(const char *name) const {
 	return true;
 }
 
+bool Palette::saveGlow(const char *name) const {
+	if (name == nullptr || name[0] == '\0') {
+		return false;
+	}
+	image::Image img(name);
+	Log::info("Save glow palette colors to %s", name);
+	// must be voxel::PaletteMaxColors - otherwise the exporter uv coordinates must get adopted
+	img.loadRGBA((const uint8_t *)glowColors, sizeof(glowColors), lengthof(glowColors), 1);
+	if (!img.writePng()) {
+		Log::warn("Failed to write the glow palette colors file '%s'", name);
+		return false;
+	}
+	return true;
+}
+
 bool Palette::load(const uint8_t *rgbaBuf, size_t bufsize) {
 	if (bufsize % 4 != 0) {
 		Log::warn("Buf size doesn't match expectation: %i", (int)bufsize);
diff --git a/src/modules/voxel/Palette.h b/src/modules/voxel/Palette.h
index c24a027d4..faa941511 100644
--- a/src/modules/voxel/Palette.h
+++ b/src/modules/voxel/Palette.h
@@ -41,6 +41,7 @@ public:
 	}
 	bool load(const char *name);
 	bool save(const char *name = nullptr) const;
+	bool saveGlow(const char *name = nullptr) const;
 	bool load(const uint8_t *rgbaBuf, size_t bufsize);
 
 	bool minecraft();