diff --git a/tools/emulator/opengl/shared/OpenglCodecCommon/GLClientState.cpp b/tools/emulator/opengl/shared/OpenglCodecCommon/GLClientState.cpp
index 7fc506821..9c70fc16c 100644
--- a/tools/emulator/opengl/shared/OpenglCodecCommon/GLClientState.cpp
+++ b/tools/emulator/opengl/shared/OpenglCodecCommon/GLClientState.cpp
@@ -164,56 +164,7 @@ int GLClientState::setPixelStore(GLenum param, GLint value)
 
 size_t GLClientState::pixelDataSize(GLsizei width, GLsizei height, GLenum format, GLenum type, int pack)
 {
-
-    int components = 0;
-    int componentsize = 0;
-    int pixelsize = 0;
-    switch(type) {
-    case GL_UNSIGNED_BYTE:
-        componentsize = 1;
-        break;
-    case GL_UNSIGNED_SHORT_5_6_5:
-    case GL_UNSIGNED_SHORT_4_4_4_4:
-    case GL_UNSIGNED_SHORT_5_5_5_1:
-        pixelsize = 2;
-        break;
-    default:
-        ERR("pixelDataSize: unknown pixel type - assuming pixel data 0\n");
-        componentsize = 0;
-    }
-
-    if (pixelsize == 0) {
-        switch(format) {
-#if 0
-        case GL_RED:
-        case GL_GREEN:
-        case GL_BLUE:
-#endif
-        case GL_ALPHA:
-        case GL_LUMINANCE:
-            components = 1;
-            break;
-        case GL_LUMINANCE_ALPHA:
-            components = 2;
-            break;
-        case GL_RGB:
-#if 0
-        case GL_BGR:
-#endif
-            components = 3;
-            break;
-        case GL_RGBA:
-#if 0
-        case GL_BGRA:
-#endif
-            components = 4;
-            break;
-        default:
-            ERR("pixelDataSize: unknown pixel format...\n");
-            components = 0;
-        }
-        pixelsize = components * componentsize;
-    }
+    int pixelsize = glUtilsPixelBitSize(format, type) >> 3;
 
     int alignment = pack ? m_pixelStore.pack_alignment : m_pixelStore.unpack_alignment;
 
diff --git a/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.cpp b/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.cpp
index ad4888a9b..645d08fb3 100644
--- a/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.cpp
+++ b/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.cpp
@@ -145,3 +145,59 @@ void glUtilsPackPointerData(unsigned char *dst, unsigned char *src,
         }
     }
 }
+
+int glUtilsPixelBitSize(GLenum format, GLenum type)
+{
+    int components = 0;
+    int componentsize = 0;
+    int pixelsize = 0;
+    switch(type) {
+    case GL_UNSIGNED_BYTE:
+        componentsize = 8;
+        break;
+    case GL_UNSIGNED_SHORT_5_6_5:
+    case GL_UNSIGNED_SHORT_4_4_4_4:
+    case GL_UNSIGNED_SHORT_5_5_5_1:
+    case GL_RGB565_OES:
+    case GL_RGB5_A1_OES:
+    case GL_RGBA4_OES:
+        pixelsize = 16;
+        break;
+    default:
+        ERR("glUtilsPixelBitSize: unknown pixel type - assuming pixel data 0\n");
+        componentsize = 0;
+    }
+
+    if (pixelsize == 0) {
+        switch(format) {
+#if 0
+        case GL_RED:
+        case GL_GREEN:
+        case GL_BLUE:
+#endif
+        case GL_ALPHA:
+        case GL_LUMINANCE:
+            components = 1;
+            break;
+        case GL_LUMINANCE_ALPHA:
+            components = 2;
+            break;
+        case GL_RGB:
+#if 0
+        case GL_BGR:
+#endif
+            components = 3;
+            break;
+        case GL_RGBA:
+        case GL_BGRA_EXT:
+            components = 4;
+            break;
+        default:
+            ERR("glUtilsPixelBitSize: unknown pixel format...\n");
+            components = 0;
+        }
+        pixelsize = components * componentsize;
+    }
+
+    return pixelsize;
+}
diff --git a/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.h b/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.h
index 96b29d660..35964066a 100644
--- a/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.h
+++ b/tools/emulator/opengl/shared/OpenglCodecCommon/glUtils.h
@@ -49,6 +49,7 @@ extern "C" {
     void   glUtilsPackPointerData(unsigned char *dst, unsigned char *str,
                            int size, GLenum type, unsigned int stride,
                            unsigned int datalen);
+    int glUtilsPixelBitSize(GLenum format, GLenum type);
 #ifdef __cplusplus
 };
 #endif