Jian Zhao authored Dec 29, 2011 and Yuanhan Liu committed Dec 30, 2011

Add test case on error check on glGetTexImage with types(like
GL_UNSIGNED_INT_10F_11F_11F_REV) that only work with format GL_RGB, but format
isn't GL_RGB the result should be GL_INVALID_OPERATION.

As glGetTexImage in OpenGL 4.2 Reference Pages:
"GL_INVALID_OPERATION is returned if type is one of GL_UNSIGNED_BYTE_3_3_2,
GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5,
GL_UNSIGNED_SHORT_5_6_5_REV, or GL_UNSIGNED_INT_10F_11F_11F_REV and format is
not GL_RGB".

v2: change the test name to be more specific and change some code style to be
easier to read (per Brian's suggest).

v3: move the case to the spec directory and rename it to
getteximage_error_check.c. (per Brian's suggest)

v4: add all the formats that only work with GL_RGB format, rename it more
specific and some minor changes. (per Ian's suggest)

v5: some changes in code styles, like "One space on either side of a binary operator or =". (per Ian's suggest)

v6: fix all the indention issues. (per yuanhan's suggest)

Signed-off-by: Jian Zhao <jian.j.zhao@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>