Fix Squish decompression, closes #18109

2 files changed, 10 insertions, 0 deletions

diff --git a/core/image.cpp b/core/image.cpp
index 172f5e517a..698a0b0b98 100644
--- a/core/image.cpp
+++ b/core/image.cpp
@@ -1766,6 +1766,15 @@ int Image::get_image_required_mipmaps(int p_width, int p_height, Format p_format
 	return mm;
 }
 
+int Image::get_image_mipmap_offset(int p_width, int p_height, Format p_format, int p_mipmap) {
+
+	if (p_mipmap <= 0) {
+		return 0;
+	}
+	int mm;
+	return _get_dst_image_size(p_width, p_height, p_format, mm, p_mipmap - 1);
+}
+
 bool Image::is_compressed() const {
 	return format > FORMAT_RGBE9995;
 }
diff --git a/core/image.h b/core/image.h
index 11f9380c3c..0770eb953e 100644
--- a/core/image.h
+++ b/core/image.h
@@ -286,6 +286,7 @@ public:
 
 	static int get_image_data_size(int p_width, int p_height, Format p_format, bool p_mipmaps = false);
 	static int get_image_required_mipmaps(int p_width, int p_height, Format p_format);
+	static int get_image_mipmap_offset(int p_width, int p_height, Format p_format, int p_mipmap);
 
 	enum CompressMode {
 		COMPRESS_S3TC,