Merge pull request #97830 from BlueCube3310/teximport-hdr-lossless

Fix layered HDR texture import with lossless compression

editor/import/resource_importer_layered_texture.cpp

@@ -276,6 +276,10 @@ void ResourceImporterLayeredTexture::_save_tex(Vector<Ref<Image>> p_images, cons
 	f->store_32(0);
 	f->store_32(0);
 
+	if ((p_compress_mode == COMPRESS_LOSSLESS || p_compress_mode == COMPRESS_LOSSY) && p_images[0]->get_format() >= Image::FORMAT_RF) {
+		p_compress_mode = COMPRESS_VRAM_UNCOMPRESSED; // These can't go as lossy.
+	}
+
 	for (int i = 0; i < p_images.size(); i++) {
 		ResourceImporterTexture::save_to_ctex_format(f, p_images[i], ResourceImporterTexture::CompressMode(p_compress_mode), used_channels, p_vram_compression, p_lossy);
 	}

editor/import/resource_importer_texture.cpp

@@ -380,7 +380,7 @@ void ResourceImporterTexture::_save_ctex(const Ref<Image> &p_image, const String
 	f->store_32(0);
 	f->store_32(0);
 
-	if ((p_compress_mode == COMPRESS_LOSSLESS || p_compress_mode == COMPRESS_LOSSY) && p_image->get_format() > Image::FORMAT_RGBA8) {
+	if ((p_compress_mode == COMPRESS_LOSSLESS || p_compress_mode == COMPRESS_LOSSY) && p_image->get_format() >= Image::FORMAT_RF) {
 		p_compress_mode = COMPRESS_VRAM_UNCOMPRESSED; //these can't go as lossy
 	}