st/wgl: Clamp wglChoosePixelFormatARB's output nNumFormats to nMaxFormats.

While running https://github.com/nvMcJohn/apitest with apitrace I noticed that Mesa was producing bogus results:

  wglChoosePixelFormatARB(hdc, piAttribIList = {...}, pfAttribFList = &0, nMaxFormats = 1, piFormats = {19, 65576, 37, 198656, 131075, 0, 402653184, 0, 0, 0, 0, -573575710}, nNumFormats = &12) = TRUE

However https://www.opengl.org/registry/specs/ARB/wgl_pixel_format.txt states

    <nNumFormats> returns the number of matching formats. The returned
    value is guaranteed to be no larger than <nMaxFormats>.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
svga: remove unneeded depth==1 assertion in svga_texture_view_surface()

We can create 3D texture views.  Avoids an assertion in piglit
fbo-generatemipmap-3d test and allows it to pass.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
docs: fix date typo: July 78 -> 18
xmlconfig: Use program_invocation_short_name when building for cygwin

mesa/mesa/src/mesa/drivers/dri/common/xmlconfig.c:104:10: warning: #warning "Per application configuration won't work with your OS version." [-Wcpp]
 #        warning "Per application configuration won't work with your OS version."

Signed-off-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Brian Paul <brianp@vmware.com>
os_process.c: Add cygwin as an expected platform

mesa/mesa/src/gallium/auxiliary/os/os_process.c:40:2: warning: #warning unexpected platform in os_process.c [-Wcpp]
 #warning unexpected platform in os_process.c
mesa/mesa/src/gallium/auxiliary/os/os_process.c:77:2: warning: #warning unexpected platform in os_process.c [-Wcpp]
 #warning unexpected platform in os_process.c

Signed-off-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Brian Paul <brianp@vmware.com>
main/get_hash_params: Add GL_SAMPLE_SHADING_ARB

GL_SAMPLE_SHADING is specified as a valid pname for glGet in the
GL_ARB_sample_shading extension.  It seems as if we forgot to add it to the
table of pnames.

Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: mesa-stable@lists.freedesktop.org
configure.ac: require libdrm_radeon 2.4.56 because of the Hawaii fix there
glsl/glcpp: Fix to emit spaces following directives

The glcpp lexer and parser use the space_tokens state bit to avoid emitting
tokens for spaces while parsing a directive. Previously, this bit was only
being set again by the first non-space token following a directive.

This led to a bug where a space, (or a comment that should emit a space),
immediately following a directive, (optionally searated by newlines), would be
omitted from the output.

Here we fix the bug by also setting the space_tokens bit whenever we lex a
newline in the standard start conditions.
glsl/glcpp: Add testing for directives preceded by a space

This test simply has one of each directive, all of which are preceded by a
single space character.
glsl/glcpp: Emit proper error for #define with a non-identifier

Previously, if the preprocessor encountered a #define with a non-identifier,
such as:

	#define 123 456

The lexer had no explicit rules to match non-identifiers in the <DEFINE> start
state. Because of this, flex's default rule was being invoked, (printing
characters to stdout), and all text was being discarded by the compiler until
the next identifier. As one can imagine, this led to all sorts of interesting
and surprising results.

Fix this by adding an explicit rule complementing the existing
identifier-based rules that should catch all non-identifiers after #define and
reliably give a well-formatted error message.

A new test is added to "make check" to ensure this bug stays fixed.

This commit also fixes the following Khronos GLES3 CTS test:

	define_non_identifier_vertex

(The "fragment" variant was passing earlier only because the preprocessor was
behaving so randomly and causing the compilation to fail. It's lucky, in fact,
that the "vertex" version succesfully compiled so we could find and fix this
bug.)

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Add support for comments between #define and macro identifier

The recent adddition of an error for "#define followed by a non-identifier"
was a bit to aggressive since it used a regular expression in the lexer to
flag any character that's not legal as the first character of an identifier.

But we need to allow comments to appear here, (since we aren't removing
comments in a preliminary pass). So we refine the error here to only flag
characters that could not be an identifier, nor a comment, nor whitespace.

We also augment the existing comment support to be active in the <DEFINE>
state as well.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Remove some un-needed calls to NEWLINE_CATCHUP

The NEWLINE_CATCHUP code is only intended to be invoked after we lex an actual
newline character ('\n'). The two extra calls here were apparently added
accidentally because the pattern happened to contain a (negated) '\n',
(see commit 6005e9cb283214cd57038c7c5e7758ba72ec6ac2).

I don't think either case could have caused any actual bug. (In the first
case, the pattern matched right up to the next newline, so the NEWLINE_CATCHUP
code was just about to be called. In the second case, I don't think it's
possible to actually enter the <SKIP> start condition after commented newlines
without any intervening newline.)

But, if nothing else, the code is cleaner without these extra calls.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Add testing for EOF sans newline (and fix for <DEFINE>, <COMMENT>)

The glcpp implementation has long had code to support a file that ends without
a final newline. But we didn't have a "make check" test for this.

Additionally, the <EOF> action was restricted only to the <INITIAL> state so
it would fail to get invoked if the EOF was encountered in the <COMMENT> or
the <DEFINE> case. Neither of these was a bug, per se, since EOF in either
of these cases is an error anyway, (either "unterminated comment" or
"missing macro name for #define").

But with the new explicit support for these cases, we not generate clean error
messages in these cases, (rather than "unexpected $end" from before).

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Drop extra, final newline from most output

The glcpp parser is line-based, so it needs to see a NEWLINE token at the end
of each line. This causes a trick for files that end without a final newline.

Previously, the lexer for glcpp punted in this case by unconditionally
returning a NEWLINE token at end-of-file, (causing most files to have an extra
blank line at the end). Here, we refine this by lexing end-of-file as a
NEWLINE token only if the immediately preceding token was not a NEWLINE token.

The patch is a minor change that only looks huge for two reasons:

	1. Almost all glcpp test result ".expected" files are updated to drop
	   the extra newline.

	2. All return statements from the lexer are adjusted to use a new
	   RETURN_TOKEN macro that tracks the last-token-was-a-newline state.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Abstract a bit of common code for returning string tokens

Now that we have a common macro for returning tokens, it makes sense to
perform some of the common work there, (such as copying string values).

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Stop using a lexer start condition (<SKIP>) for token skipping.

Here, "skipping" refers to the lexer not emitting any tokens for portions of
the file within an #if condition (or similar) that evaluates to false.

Previously, the lexer had a special <SKIP> start condition used to control
this skipping. This start condition was not handled like a normal start
condition. Instead, there was a particularly ugly block of code set to be
included at the top of the generated lexing loop that would change from
<INITIAL> to <SKIP> or from <SKIP> to <INITIAL> depending on various pieces of
parser state, (such as parser->skip_state and parser->lexing_directive).

Not only was that an ugly approach, but the <SKIP> start condition was
complicating several glcpp bug fixes I attempted recently that want to use
start conditions for other purposes, (such as a new <HASH> start condition).

The recently added RETURN_TOKEN macro gives us a convenient way to implement
skipping without using a lexer start condition. Now, at the top of the
generated lexer, we examine all the necessary parser state and set a new
parser->skipping bit. Then, in RETURN_TOKEN, we examine parser->skipping to
determine whether to actually emit the token or not.

Besides this, there are only a couple of other places where we need to examine
the skipping bit (other than when returning a token):

	* To avoid emitting an error for #error if skipped.

	* To avoid entering the <DEFINE> start condition for a #define that is
          skipped.

With all of this in place in the present commit, there are hopefully no
behavioral changes with this patch, ("make check" still passes all of the
glcpp tests at least).

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Minor tweak to wording of error message

It makes more sense to print the directive name with the preceding '#'.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Fix off-by-one error in column in first-line error messages

For the first line we were initializing the column to 1, but for all
subsequent lines we were initializing the column to 0. The column number is
advanced for each token read before any error message is printed. So the 0
value is the correct initialization, (so that the first column is reported as
column 1).

With this extremely minor change, many of the .expected files are updated such
that error messages for the first line now have the correct column number in
them.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Add a -d/--debug option to the standalone glcpp program

The verbose debug output from the parser is quite useful when debugging, and
having this available as a command-line option is much more convenient than
manually forcing this into the code when needed, (which is what I had been
doing for too long previously).

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
glsl/glcpp: Don't use start-condition stack when switching to/from <DEFINE>

This commit does not cause any behavioral change for any valid program. Prior
to entering the <DEFINE> start condition, the only valid start condition is
<INITIAL>, so whether pushing/popping <DEFINE> onto the stack or explicit
returning to <INITIAL> is equivalent.

The reason for this change is that we are planning to soon add a start
condition for <HASH> with the following semantics:

	<HASH>: We just saw a directive-introducing '#'

	<DEFINE>: We just saw "#define" starting a directive

With these two start conditions in place, the only correct behavior is to
leave <DEFINE> by returning to <INITIAL>. But the old push/pop code would have
returned to the <HASH> start condition which would then cause an error when
the next directive-introducing '#' would be encountered.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>