main: Clear shader program data whenever ProgramBinary is called

The GL_ARB_get_program_binary extension spec says:

 "If ProgramBinary fails to load a binary, no error is generated, but
  any information about a previous link or load of that program object
  is lost."

v2:
 * Re-initialize shProg->data after clear. (Jordan)
   (Required after 6a72eba755fea15a0d97abb913a6315d9d32e274)

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 51031e1..4607cbb 100644 (file)
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -2221,6 +2221,9 @@ _mesa_ProgramBinary(GLuint program, GLenum binaryFormat,
    if (!shProg)
       return;
 
+   _mesa_clear_shader_program_data(ctx, shProg);
+   shProg->data = _mesa_create_shader_program_data();
+
    /* Section 2.3.1 (Errors) of the OpenGL 4.5 spec says:
     *
     *     "If a negative number is provided where an argument of type sizei or