Mesa (master): glsl: pass GLcontext:: Extension info down into GLSL preprocessor
Brian Paul
brianp at kemper.freedesktop.org
Thu Jan 8 01:49:30 UTC 2009
Module: Mesa
Branch: master
Commit: 9629be5e07dc1d2b69cf7a761a6bb3ac0ec26453
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=9629be5e07dc1d2b69cf7a761a6bb3ac0ec26453
Author: Brian Paul <brianp at vmware.com>
Date: Wed Jan 7 18:44:00 2009 -0700
glsl: pass GLcontext::Extension info down into GLSL preprocessor
Now the #extension directives can be handled properly.
---
src/mesa/shader/slang/slang_compile.c | 14 +++--
src/mesa/shader/slang/slang_preprocess.c | 80 ++++++++++++++++++++----------
src/mesa/shader/slang/slang_preprocess.h | 6 +-
3 files changed, 65 insertions(+), 35 deletions(-)
diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c
index d8aefd6..c150931 100644
--- a/src/mesa/shader/slang/slang_compile.c
+++ b/src/mesa/shader/slang/slang_compile.c
@@ -2474,7 +2474,8 @@ static GLboolean
compile_with_grammar(grammar id, const char *source, slang_code_unit * unit,
slang_unit_type type, slang_info_log * infolog,
slang_code_unit * builtin,
- struct gl_shader *shader)
+ struct gl_shader *shader,
+ const struct gl_extensions *extensions)
{
byte *prod;
GLuint size, start, version;
@@ -2502,7 +2503,8 @@ compile_with_grammar(grammar id, const char *source, slang_code_unit * unit,
/* Now preprocess the source string. */
slang_string_init(&preprocessed);
- if (!_slang_preprocess_directives(&preprocessed, &source[start], infolog)) {
+ if (!_slang_preprocess_directives(&preprocessed, &source[start],
+ infolog, extensions)) {
slang_string_free(&preprocessed);
slang_info_log_error(infolog, "failed to preprocess the source.");
return GL_FALSE;
@@ -2575,7 +2577,8 @@ static const byte slang_vertex_builtin_gc[] = {
static GLboolean
compile_object(grammar * id, const char *source, slang_code_object * object,
slang_unit_type type, slang_info_log * infolog,
- struct gl_shader *shader)
+ struct gl_shader *shader,
+ const struct gl_extensions *extensions)
{
slang_code_unit *builtins = NULL;
GLuint base_version = 110;
@@ -2674,7 +2677,7 @@ compile_object(grammar * id, const char *source, slang_code_object * object,
/* compile the actual shader - pass-in built-in library for external shader */
return compile_with_grammar(*id, source, &object->unit, type, infolog,
- builtins, shader);
+ builtins, shader, extensions);
}
@@ -2697,7 +2700,8 @@ compile_shader(GLcontext *ctx, slang_code_object * object,
_slang_code_object_dtr(object);
_slang_code_object_ctr(object);
- success = compile_object(&id, shader->Source, object, type, infolog, shader);
+ success = compile_object(&id, shader->Source, object, type, infolog, shader,
+ &ctx->Extensions);
if (id != 0)
grammar_destroy(id);
if (!success)
diff --git a/src/mesa/shader/slang/slang_preprocess.c b/src/mesa/shader/slang/slang_preprocess.c
index 7d97162..76e757c 100644
--- a/src/mesa/shader/slang/slang_preprocess.c
+++ b/src/mesa/shader/slang/slang_preprocess.c
@@ -1,8 +1,8 @@
/*
* Mesa 3-D graphics library
- * Version: 6.5.2
*
- * Copyright (C) 2005-2006 Brian Paul All Rights Reserved.
+ * Copyright (C) 2005-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -475,52 +475,63 @@ pp_cond_stack_reevaluate (pp_cond_stack *self)
self->top->effective = self->top->current && self->top[1].effective;
}
-/*
+
+/**
* Extension enables through #extension directive.
* NOTE: Currently, only enable/disable state is stored.
*/
-
typedef struct
{
- GLboolean MESA_shader_debug; /* GL_MESA_shader_debug enable */
- GLboolean ARB_texture_rectangle; /* GL_ARB_texture_rectangle enable */
+ GLboolean ARB_draw_buffers;
+ GLboolean ARB_texture_rectangle;
} pp_ext;
-/*
+
+/**
* Disable all extensions. Called at startup and on #extension all: disable.
*/
static GLvoid
-pp_ext_disable_all (pp_ext *self)
+pp_ext_disable_all(pp_ext *self)
{
- self->MESA_shader_debug = GL_FALSE;
+ _mesa_memset(self, 0, sizeof(self));
}
+
+/**
+ * Called during preprocessor initialization to set the initial enable/disable
+ * state of extensions.
+ */
static GLvoid
-pp_ext_init (pp_ext *self)
+pp_ext_init(pp_ext *self, const struct gl_extensions *extensions)
{
pp_ext_disable_all (self);
- self->ARB_texture_rectangle = GL_TRUE;
- /* Other initialization code goes here. */
+ if (extensions->ARB_draw_buffers)
+ self->ARB_draw_buffers = GL_TRUE;
+ if (extensions->NV_texture_rectangle)
+ self->ARB_texture_rectangle = GL_TRUE;
}
+/**
+ * Called in response to #extension directives to enable/disable
+ * the named extension.
+ */
static GLboolean
-pp_ext_set (pp_ext *self, const char *name, GLboolean enable)
+pp_ext_set(pp_ext *self, const char *name, GLboolean enable)
{
- if (_mesa_strcmp (name, "MESA_shader_debug") == 0)
- self->MESA_shader_debug = enable;
+ if (_mesa_strcmp (name, "GL_ARB_draw_buffers") == 0)
+ self->ARB_draw_buffers = enable;
else if (_mesa_strcmp (name, "GL_ARB_texture_rectangle") == 0)
self->ARB_texture_rectangle = enable;
- /* Next extension name tests go here. */
else
return GL_FALSE;
return GL_TRUE;
}
-/*
- * The state of preprocessor: current line, file and version number, list of all defined macros
- * and the #if/#endif context.
- */
+/**
+ * The state of preprocessor: current line, file and version number, list
+ * of all defined macros and the #if/#endif context.
+ */
typedef struct
{
GLint line;
@@ -533,7 +544,8 @@ typedef struct
} pp_state;
static GLvoid
-pp_state_init (pp_state *self, slang_info_log *elog)
+pp_state_init (pp_state *self, slang_info_log *elog,
+ const struct gl_extensions *extensions)
{
self->line = 0;
self->file = 1;
@@ -543,7 +555,7 @@ pp_state_init (pp_state *self, slang_info_log *elog)
self->version = 110;
#endif
pp_symbols_init (&self->symbols);
- pp_ext_init (&self->ext);
+ pp_ext_init (&self->ext, extensions);
self->elog = elog;
/* Initialize condition stack and create the global context. */
@@ -851,8 +863,10 @@ parse_if (slang_string *output, const byte *prod, GLuint *pi, GLint *result, pp_
#define BEHAVIOR_DISABLE 4
static GLboolean
-preprocess_source (slang_string *output, const char *source, grammar pid, grammar eid,
- slang_info_log *elog)
+preprocess_source (slang_string *output, const char *source,
+ grammar pid, grammar eid,
+ slang_info_log *elog,
+ const struct gl_extensions *extensions)
{
static const char *predefined[] = {
"__FILE__",
@@ -873,7 +887,7 @@ preprocess_source (slang_string *output, const char *source, grammar pid, gramma
return GL_FALSE;
}
- pp_state_init (&state, elog);
+ pp_state_init (&state, elog, extensions);
/* add the predefined symbols to the symbol table */
for (i = 0; predefined[i]; i++) {
@@ -1196,8 +1210,20 @@ error:
return GL_FALSE;
}
+
+/**
+ * Run preprocessor on source code.
+ * \param extensions indicates which GL extensions are enabled
+ * \param output the post-process results
+ * \param input the input text
+ * \param elog log to record warnings, errors
+ * \return GL_TRUE for success, GL_FALSE for error
+ */
GLboolean
-_slang_preprocess_directives (slang_string *output, const char *input, slang_info_log *elog)
+_slang_preprocess_directives(slang_string *output,
+ const char *input,
+ slang_info_log *elog,
+ const struct gl_extensions *extensions)
{
grammar pid, eid;
GLboolean success;
@@ -1213,7 +1239,7 @@ _slang_preprocess_directives (slang_string *output, const char *input, slang_inf
grammar_destroy (pid);
return GL_FALSE;
}
- success = preprocess_source (output, input, pid, eid, elog);
+ success = preprocess_source (output, input, pid, eid, elog, extensions);
grammar_destroy (eid);
grammar_destroy (pid);
return success;
diff --git a/src/mesa/shader/slang/slang_preprocess.h b/src/mesa/shader/slang/slang_preprocess.h
index d8eb12e..dd996a6 100644
--- a/src/mesa/shader/slang/slang_preprocess.h
+++ b/src/mesa/shader/slang/slang_preprocess.h
@@ -33,8 +33,8 @@ extern GLboolean
_slang_preprocess_version (const char *, GLuint *, GLuint *, slang_info_log *);
extern GLboolean
-_slang_preprocess_directives (slang_string *output, const char *input,
- slang_info_log *);
-
+_slang_preprocess_directives(slang_string *output, const char *input,
+ slang_info_log *,
+ const struct gl_extensions *extensions);
#endif /* SLANG_PREPROCESS_H */
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