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authormarha <marha@users.sourceforge.net>2011-01-29 18:43:24 +0000
committermarha <marha@users.sourceforge.net>2011-01-29 18:43:24 +0000
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libXext libfontenc libXau libX11 libXinerama mesa libXdmcp git update 28 jan 2011
Diffstat (limited to 'mesalib/src/glsl/glcpp/README')
-rw-r--r--mesalib/src/glsl/glcpp/README87
1 files changed, 32 insertions, 55 deletions
diff --git a/mesalib/src/glsl/glcpp/README b/mesalib/src/glsl/glcpp/README
index 9cc00e927..735b27d44 100644
--- a/mesalib/src/glsl/glcpp/README
+++ b/mesalib/src/glsl/glcpp/README
@@ -1,55 +1,32 @@
-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 handles according to the GLSL specification
-and will not appear in the output.
-
-Known limitations
------------------
-The __LINE__ and __FILE__ macros are not yet supported.
-
-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).
-
-Known deviations from the specification
----------------------------------------
-As mentoned above, the GLSL specification (as of 1.30.10) is fairly
-vague on some aspects of the preprocessor, and we've been using C99 to
-fill in details. Here is a list of cases where we have deviated from
-the behavior specified in C99 to obtain better compatibility with
-other GLSL implementations:
-
- * Redefining a macro with a different value
-
- C89 says that a macro "may be redefined ... provided that the
- second definition [is equivalent]" (Section 3.8.3 Macro
- Replacement/constraints)
-
- C99 is even more explicit, saying tthat a macro "shall not be
- redefined by another #define preprocessing directive unless the
- second definition [is equivalent]" (Section 6.10.3 Macro
- Replacement/Constraints)
-
- In spite of this, glcpp emits a warning rather than an error for
- non-equivalent redefinition of macros since this matches the
- behavior of other, widely-used implementations.
+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 handles according to the GLSL specification
+and will not appear in the output.
+
+Known limitations
+-----------------
+The __LINE__ and __FILE__ macros are not yet supported.
+
+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). \ No newline at end of file