From c629b16ebce5c8e7b2d8e2a3e842b069965bd6be Mon Sep 17 00:00:00 2001
From: raysan5 <raysan5@gmail.com>
Date: Mon, 12 Aug 2019 12:35:23 +0200
Subject: [PATCH] Corrected issue on compressed textures data size

---
 src/rlgl.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/rlgl.h b/src/rlgl.h
index aa0c5e144..5e7312bde 100644
--- a/src/rlgl.h
+++ b/src/rlgl.h
@@ -4623,6 +4623,14 @@ int GetPixelDataSize(int width, int height, int format)
     }
 
     dataSize = width*height*bpp/8;  // Total data size in bytes
+    
+    // Most compressed formats works on 4x4 blocks, 
+    // if texture is smaller, minimum dataSize is 8 or 16
+    if ((width < 4) && (height < 4))
+    {
+        if ((format >= COMPRESSED_DXT1_RGB) && (format < COMPRESSED_DXT3_RGBA)) dataSize = 8;
+        else if ((format >= COMPRESSED_DXT3_RGBA) && (format < COMPRESSED_ASTC_8x8_RGBA)) dataSize = 16;
+    }
 
     return dataSize;
 }