mesa/src/compiler/glsl/glcpp
Emil Velikov cf77cdce83 glcpp/tests: update testname in help string
Rather than hardcoding glcpp/other use `basename "$0"` which expands
appropriatelly.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
2017-03-28 15:31:24 +01:00
..
tests glcpp/tests: update testname in help string 2017-03-28 15:31:24 +01:00
.gitignore glsl: move to compiler/ 2016-01-26 16:08:33 +00:00
glcpp-lex.l glcpp: Allow vertical tab and form feed characters in GLSL 2017-01-04 14:40:48 -08:00
glcpp-parse.y glsl: Add "built-in" functions to do 64%64 => 64 modulus 2017-01-20 15:41:23 -08:00
glcpp.c glsl: reuse main extension table to appropriately restrict extensions 2016-07-23 13:48:04 -04:00
glcpp.h glsl: Add "built-in" functions to do 64x64 => 64 multiplication 2017-01-20 15:41:23 -08:00
pp.c glsl: Add "built-in" functions to do 64x64 => 64 multiplication 2017-01-20 15:41:23 -08:00
README glsl: move to compiler/ 2016-01-26 16:08:33 +00:00

glcpp -- GLSL "C" preprocessor

This is a simple preprocessor designed to provide the preprocessing
needs of the GLSL language. The requirements for this preprocessor are
specified in the GLSL 1.30 specification availble from:

http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.10.pdf

This specification is not precise on some semantics, (for example,
#define and #if), defining these merely "as is standard for C++
preprocessors". To fill in these details, I've been using a draft of
the C99 standard as available from:

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf

Any downstream compiler accepting output from glcpp should be prepared
to encounter and deal with the following preprocessor macros:

	#line
	#pragma
	#extension

All other macros will be handled according to the GLSL specification
and will not appear in the output.

Known limitations
-----------------
A file that ends with a function-like macro name as the last
non-whitespace token will result in a parse error, (where it should be
passed through as is).