diff --git a/engine/common/imagelib/imagelib.h b/engine/common/imagelib/imagelib.h
index 623676c8..e4b6614c 100644
--- a/engine/common/imagelib/imagelib.h
+++ b/engine/common/imagelib/imagelib.h
@@ -142,6 +142,7 @@ void Image_CopyPalette32bit( void );
 void Image_SetPixelFormat( void );
 void Image_GetPaletteQ1( void );
 void Image_GetPaletteHL( void );
+size_t Image_ComputeSize( int type, int width, int height, int depth );
 
 //
 // formats load
diff --git a/engine/common/imagelib/img_dds.c b/engine/common/imagelib/img_dds.c
index be322da9..9eacf673 100644
--- a/engine/common/imagelib/img_dds.c
+++ b/engine/common/imagelib/img_dds.c
@@ -215,33 +215,6 @@ void Image_DXTGetPixelFormat( dds_t *hdr, dds_header_dxt10_t *headerExt )
 		image.num_mips = hdr->dwMipMapCount; // get actual mip count
 }
 
-size_t Image_DXTGetLinearSize( int type, int width, int height, int depth )
-{
-	switch( type )
-	{
-	case PF_DXT1:
-	case PF_BC4_SIGNED:
-	case PF_BC4_UNSIGNED:
-		return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 8 );
-	case PF_DXT3:
-	case PF_DXT5:
-	case PF_BC6H_SIGNED:
-	case PF_BC6H_UNSIGNED:
-	case PF_BC7_UNORM:
-	case PF_BC7_SRGB:
-	case PF_BC5_UNSIGNED:
-	case PF_BC5_SIGNED:
-	case PF_ATI2: return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 16 );
-	case PF_LUMINANCE: return (width * height * depth);
-	case PF_BGR_24:
-	case PF_RGB_24: return (width * height * depth * 3);
-	case PF_BGRA_32:
-	case PF_RGBA_32: return (width * height * depth * 4);
-	}
-
-	return 0;
-}
-
 size_t Image_DXTCalcMipmapSize( dds_t *hdr )
 {
 	size_t	buffsize = 0;
@@ -252,7 +225,7 @@ size_t Image_DXTCalcMipmapSize( dds_t *hdr )
 	{
 		width = Q_max( 1, ( hdr->dwWidth >> i ));
 		height = Q_max( 1, ( hdr->dwHeight >> i ));
-		buffsize += Image_DXTGetLinearSize( image.type, width, height, image.depth );
+		buffsize += Image_ComputeSize( image.type, width, height, image.depth );
 	}
 
 	return buffsize;
@@ -301,7 +274,7 @@ void Image_DXTAdjustVolume( dds_t *hdr )
 	if( hdr->dwDepth <= 1 )
 		return;
 
-	hdr->dwLinearSize = Image_DXTGetLinearSize( image.type, hdr->dwWidth, hdr->dwHeight, hdr->dwDepth );
+	hdr->dwLinearSize = Image_ComputeSize( image.type, hdr->dwWidth, hdr->dwHeight, hdr->dwDepth );
 	hdr->dwFlags |= DDS_LINEARSIZE;
 }
 
diff --git a/engine/common/imagelib/img_ktx2.c b/engine/common/imagelib/img_ktx2.c
index 8d77413c..ecbea904 100644
--- a/engine/common/imagelib/img_ktx2.c
+++ b/engine/common/imagelib/img_ktx2.c
@@ -67,40 +67,6 @@ static void Image_KTX2Format( uint32_t ktx2_format )
 	}
 }
 
-// FIXME this codebase has too many copies of this function:
-// - ref_gl has one
-// - ref_vk has one
-// - ref_soft has one
-// - img_dds has one
-// - many more places probably have one too
-// - and now img_ktx2 also has one!
-static size_t ImageSizeForType( int type, int width, int height, int depth )
-{
-	switch( type )
-	{
-	case PF_DXT1:
-	case PF_BC4_SIGNED:
-	case PF_BC4_UNSIGNED:
-		return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 8 );
-	case PF_DXT3:
-	case PF_DXT5:
-	case PF_ATI2:
-	case PF_BC5_UNSIGNED:
-	case PF_BC5_SIGNED:
-	case PF_BC6H_SIGNED:
-	case PF_BC6H_UNSIGNED:
-	case PF_BC7_UNORM:
-	case PF_BC7_SRGB: return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 16 );
-	case PF_LUMINANCE: return ( width * height * depth );
-	case PF_BGR_24:
-	case PF_RGB_24: return ( width * height * depth * 3 );
-	case PF_BGRA_32:
-	case PF_RGBA_32: return ( width * height * depth * 4 );
-	}
-
-	return 0;
-}
-
 static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer, fs_offset_t filesize )
 {
 	ktx2_index_t index;
@@ -160,7 +126,7 @@ static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer
 	{
 		const uint32_t width = Q_max( 1, ( header->pixelWidth >> mip ));
 		const uint32_t height = Q_max( 1, ( header->pixelHeight >> mip ));
-		const uint32_t mip_size = ImageSizeForType( image.type, width, height, image.depth );
+		const uint32_t mip_size = Image_ComputeSize( image.type, width, height, image.depth );
 
 		ktx2_level_t level;
 		memcpy( &level, levels_begin + mip * sizeof level, sizeof level );
diff --git a/engine/common/imagelib/img_utils.c b/engine/common/imagelib/img_utils.c
index d324f198..a6cd189e 100644
--- a/engine/common/imagelib/img_utils.c
+++ b/engine/common/imagelib/img_utils.c
@@ -1447,3 +1447,36 @@ qboolean Image_Process(rgbdata_t **pix, int width, int height, uint flags, float
 
 	return result;
 }
+
+// This codebase has too many copies of this function:
+// - ref_gl has one
+// - ref_vk has one
+// - ref_soft has one
+// - many more places probably have one too
+// TODO figure out how to make it available for ref_*
+size_t Image_ComputeSize( int type, int width, int height, int depth )
+{
+	switch( type )
+	{
+	case PF_DXT1:
+	case PF_BC4_SIGNED:
+	case PF_BC4_UNSIGNED:
+		return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 8 );
+	case PF_DXT3:
+	case PF_DXT5:
+	case PF_ATI2:
+	case PF_BC5_UNSIGNED:
+	case PF_BC5_SIGNED:
+	case PF_BC6H_SIGNED:
+	case PF_BC6H_UNSIGNED:
+	case PF_BC7_UNORM:
+	case PF_BC7_SRGB: return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 16 );
+	case PF_LUMINANCE: return ( width * height * depth );
+	case PF_BGR_24:
+	case PF_RGB_24: return ( width * height * depth * 3 );
+	case PF_BGRA_32:
+	case PF_RGBA_32: return ( width * height * depth * 4 );
+	}
+
+	return 0;
+}