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-rw-r--r--src/mesa/main/readpix.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/main/readpix.c b/src/mesa/main/readpix.c
index f4d74e8be6..93f2bd31cc 100644
--- a/src/mesa/main/readpix.c
+++ b/src/mesa/main/readpix.c
@@ -103,6 +103,12 @@ _mesa_error_check_format_type(GLcontext *ctx, GLenum format, GLenum type,
"glReadPixels(no color buffer)");
return GL_TRUE;
}
+ /* We no longer support CI-mode color buffers so trying to read
+ * GL_COLOR_INDEX pixels is always an error.
+ */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glReadPixels(color buffer is RGB)");
+ return GL_TRUE;
}
break;
case GL_STENCIL_INDEX: