diff --git a/include/osg/Texture b/include/osg/Texture
index a7e265ea9..3cae9ade4 100644
--- a/include/osg/Texture
+++ b/include/osg/Texture
@@ -54,6 +54,33 @@
 #define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT        0x83F3
 #endif
 
+#ifndef GL_NV_texture_shader
+#define GL_HILO_NV                              0x86F4
+#define GL_DSDT_NV                              0x86F5
+#define GL_DSDT_MAG_NV                          0x86F6
+#define GL_DSDT_MAG_VIB_NV                      0x86F7
+#define GL_HILO16_NV                            0x86F8
+#define GL_SIGNED_HILO_NV                       0x86F9
+#define GL_SIGNED_HILO16_NV                     0x86FA
+#define GL_SIGNED_RGBA_NV                       0x86FB
+#define GL_SIGNED_RGBA8_NV                      0x86FC
+#define GL_SIGNED_RGB_NV                        0x86FE
+#define GL_SIGNED_RGB8_NV                       0x86FF
+#define GL_SIGNED_LUMINANCE_NV                  0x8701
+#define GL_SIGNED_LUMINANCE8_NV                 0x8702
+#define GL_SIGNED_LUMINANCE_ALPHA_NV            0x8703
+#define GL_SIGNED_LUMINANCE8_ALPHA8_NV          0x8704
+#define GL_SIGNED_ALPHA_NV                      0x8705
+#define GL_SIGNED_ALPHA8_NV                     0x8706
+#define GL_SIGNED_INTENSITY_NV                  0x8707
+#define GL_SIGNED_INTENSITY8_NV                 0x8708
+#define GL_DSDT8_NV                             0x8709
+#define GL_DSDT8_MAG8_NV                        0x870A
+#define GL_DSDT8_MAG8_INTENSITY8_NV             0x870B
+#define GL_SIGNED_RGB_UNSIGNED_ALPHA_NV         0x870C
+#define GL_SIGNED_RGB8_UNSIGNED_ALPHA8_NV       0x870D
+#endif
+
 #ifndef GL_MIRRORED_REPEAT_IBM
 #define GL_MIRRORED_REPEAT_IBM            0x8370
 #endif
diff --git a/src/osg/Image.cpp b/src/osg/Image.cpp
index d7d006f93..5063f0a75 100644
--- a/src/osg/Image.cpp
+++ b/src/osg/Image.cpp
@@ -158,6 +158,10 @@ unsigned int Image::computeNumComponents(GLenum pixelFormat)
         case(GL_BGRA): return 4;
         case(GL_LUMINANCE): return 1;
         case(GL_LUMINANCE_ALPHA): return 2;
+        case(GL_HILO_NV): return 2;
+        case(GL_DSDT_NV): return 2;
+        case(GL_DSDT_MAG_NV): return 3;
+        case(GL_DSDT_MAG_VIB_NV): return 4;
         default:
         {
             notify(WARN)<<"error pixelFormat = "<<std::hex<<pixelFormat<<std::endl;