Fix macOS icon export (add 1024px PNG icon and 32px/16px RLE icons).

(cherry picked from commit 56b26c4369)

platform/osx/export/export.cpp

@@ -138,10 +138,76 @@ void EditorExportPlatformOSX::get_export_options(List<ExportOption> *r_options)
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "texture_format/etc2"), false));
 }
 
+void _rgba8_to_packbits_encode(int p_ch, int p_size, PoolVector<uint8_t> &p_source, Vector<uint8_t> &p_dest) {
+
+	int src_len = p_size * p_size;
+
+	Vector<uint8_t> result;
+	result.resize(src_len * 1.25); //temp vector for rle encoded data, make it 25% larger for worst case scenario
+	int res_size = 0;
+
+	uint8_t buf[128];
+	int buf_size = 0;
+
+	int i = 0;
+	while (i < src_len) {
+		uint8_t cur = p_source.read()[i * 4 + p_ch];
+
+		if (i < src_len - 2) {
+
+			if ((p_source.read()[(i + 1) * 4 + p_ch] == cur) && (p_source.read()[(i + 2) * 4 + p_ch] == cur)) {
+				if (buf_size > 0) {
+					result[res_size++] = (uint8_t)(buf_size - 1);
+					copymem(&result[res_size], &buf, buf_size);
+					res_size += buf_size;
+					buf_size = 0;
+				}
+
+				uint8_t lim = i + 130 >= src_len ? src_len - i - 1 : 130;
+				bool hit_lim = true;
+
+				for (int j = 3; j <= lim; j++) {
+					if (p_source.read()[(i + j) * 4 + p_ch] != cur) {
+						hit_lim = false;
+						i = i + j - 1;
+						result[res_size++] = (uint8_t)(j - 3 + 0x80);
+						result[res_size++] = cur;
+						break;
+					}
+				}
+				if (hit_lim) {
+					result[res_size++] = (uint8_t)(lim - 3 + 0x80);
+					result[res_size++] = cur;
+					i = i + lim;
+				}
+			} else {
+				buf[buf_size++] = cur;
+				if (buf_size == 128) {
+					result[res_size++] = (uint8_t)(buf_size - 1);
+					copymem(&result[res_size], &buf, buf_size);
+					res_size += buf_size;
+					buf_size = 0;
+				}
+			}
+		} else {
+			buf[buf_size++] = cur;
+			result[res_size++] = (uint8_t)(buf_size - 1);
+			copymem(&result[res_size], &buf, buf_size);
+			res_size += buf_size;
+			buf_size = 0;
+		}
+
+		i++;
+	}
+
+	int ofs = p_dest.size();
+	p_dest.resize(p_dest.size() + res_size);
+	copymem(&p_dest[ofs], result.ptr(), res_size);
+}
+
 void EditorExportPlatformOSX::_make_icon(const Ref<Image> &p_icon, Vector<uint8_t> &p_data) {
 
 	Ref<ImageTexture> it = memnew(ImageTexture);
-	int size = 512;
 
 	Vector<uint8_t> data;
 
@@ -151,32 +217,82 @@ void EditorExportPlatformOSX::_make_icon(const Ref<Image> &p_icon, Vector<uint8_
 	data[2] = 'n';
 	data[3] = 's';
 
-	const char *name[] = { "ic09", "ic08", "ic07", "icp6", "icp5", "icp4" };
+	struct MacOSIconInfo {
-	int index = 0;
+		const char *name;
+		const char *mask_name;
+		bool is_png;
+		int size;
+	};
 
-	while (size >= 16) {
+	static const MacOSIconInfo icon_infos[] = {
+		{ "ic10", "", true, 1024 }, //1024x1024 32-bit PNG and 512x512@2x 32-bit "retina" PNG
+		{ "ic09", "", true, 512 }, //512×512 32-bit PNG
+		{ "ic14", "", true, 512 }, //256x256@2x 32-bit "retina" PNG
+		{ "ic08", "", true, 256 }, //256×256 32-bit PNG
+		{ "ic13", "", true, 256 }, //128x128@2x 32-bit "retina" PNG
+		{ "ic07", "", true, 128 }, //128x128 32-bit PNG
+		{ "ic12", "", true, 64 }, //32x32@2x 32-bit "retina" PNG
+		{ "ic11", "", true, 32 }, //16x16@2x 32-bit "retina" PNG
+		{ "il32", "l8mk", false, 32 }, //32x32 24-bit RLE + 8-bit uncompressed mask
+		{ "is32", "s8mk", false, 16 } //16x16 24-bit RLE + 8-bit uncompressed mask
+	};
 
+	for (unsigned int i = 0; i < (sizeof(icon_infos) / sizeof(icon_infos[0])); ++i) {
 		Ref<Image> copy = p_icon; // does this make sense? doesn't this just increase the reference count instead of making a copy? Do we even need a copy?
 		copy->convert(Image::FORMAT_RGBA8);
-		copy->resize(size, size);
+		copy->resize(icon_infos[i].size, icon_infos[i].size);
-		it->create_from_image(copy);
-		String path = EditorSettings::get_singleton()->get_cache_dir().plus_file("icon.png");
-		ResourceSaver::save(path, it);
 
-		FileAccess *f = FileAccess::open(path, FileAccess::READ);
+		if (icon_infos[i].is_png) {
-		ERR_FAIL_COND(!f);
+			//encode png icon
+			it->create_from_image(copy);
+			String path = EditorSettings::get_singleton()->get_cache_dir().plus_file("icon.png");
+			ResourceSaver::save(path, it);
 
-		int ofs = data.size();
+			FileAccess *f = FileAccess::open(path, FileAccess::READ);
-		uint32_t len = f->get_len();
+			ERR_FAIL_COND(!f);
-		data.resize(data.size() + len + 8);
+
-		f->get_buffer(&data[ofs + 8], len);
+			int ofs = data.size();
-		memdelete(f);
+			uint32_t len = f->get_len();
-		len += 8;
+			data.resize(data.size() + len + 8);
-		len = BSWAP32(len);
+			f->get_buffer(&data[ofs + 8], len);
-		copymem(&data[ofs], name[index], 4);
+			memdelete(f);
-		encode_uint32(len, &data[ofs + 4]);
+			len += 8;
-		index++;
+			len = BSWAP32(len);
-		size /= 2;
+			copymem(&data[ofs], icon_infos[i].name, 4);
+			encode_uint32(len, &data[ofs + 4]);
+		} else {
+			PoolVector<uint8_t> src_data = copy->get_data();
+
+			//encode 24bit RGB RLE icon
+			{
+				int ofs = data.size();
+				data.resize(data.size() + 8);
+
+				_rgba8_to_packbits_encode(0, icon_infos[i].size, src_data, data); // encode R
+				_rgba8_to_packbits_encode(1, icon_infos[i].size, src_data, data); // encode G
+				_rgba8_to_packbits_encode(2, icon_infos[i].size, src_data, data); // encode B
+
+				int len = data.size() - ofs;
+				len = BSWAP32(len);
+				copymem(&data[ofs], icon_infos[i].name, 4);
+				encode_uint32(len, &data[ofs + 4]);
+			}
+
+			//encode 8bit mask uncompressed icon
+			{
+				int ofs = data.size();
+				int len = copy->get_width() * copy->get_height();
+				data.resize(data.size() + len + 8);
+
+				for (int j = 0; j < len; j++) {
+					data[ofs + 8 + j] = src_data.read()[j * 4 + 3];
+				}
+				len += 8;
+				len = BSWAP32(len);
+				copymem(&data[ofs], icon_infos[i].mask_name, 4);
+				encode_uint32(len, &data[ofs + 4]);
+			}
+		}
 	}
 
 	uint32_t total_len = data.size();