glsl: Add infrastructure for ARB_shading_language_packing

[mesa.git] / src / glsl / glsl_parser_extras.h

diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index fc5d11cb97c20eb2780c12e121fce5e83ddd0528..53df149d87168ac81588d27edde51975f846a9d1 100644 (file)
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -56,6 +56,19 @@ struct glsl_switch_state {
    bool is_switch_innermost; // if switch stmt is closest to break, ...
 };
 
+const char *
+glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version);
+
+typedef struct YYLTYPE {
+   int first_line;
+   int first_column;
+   int last_line;
+   int last_column;
+   unsigned source;
+} YYLTYPE;
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1
+
 struct _mesa_glsl_parse_state {
    _mesa_glsl_parse_state(struct gl_context *_ctx, GLenum target,
                          void *mem_ctx);
@@ -77,6 +90,55 @@ struct _mesa_glsl_parse_state {
       ralloc_free(mem);
    }
 
+   /**
+    * Generate a string representing the GLSL version currently being compiled
+    * (useful for error messages).
+    */
+   const char *get_version_string()
+   {
+      return glsl_compute_version_string(this, this->es_shader,
+                                         this->language_version);
+   }
+
+   /**
+    * Determine whether the current GLSL version is sufficiently high to
+    * support a certain feature.
+    *
+    * \param required_glsl_version is the desktop GLSL version that is
+    * required to support the feature, or 0 if no version of desktop GLSL
+    * supports the feature.
+    *
+    * \param required_glsl_es_version is the GLSL ES version that is required
+    * to support the feature, or 0 if no version of GLSL ES suports the
+    * feature.
+    */
+   bool is_version(unsigned required_glsl_version,
+                   unsigned required_glsl_es_version)
+   {
+      unsigned required_version = this->es_shader ?
+         required_glsl_es_version : required_glsl_version;
+      return required_version != 0
+         && this->language_version >= required_version;
+   }
+
+   bool check_version(unsigned required_glsl_version,
+                      unsigned required_glsl_es_version,
+                      YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6);
+
+   bool check_precision_qualifiers_allowed(YYLTYPE *locp)
+   {
+      return check_version(130, 100, locp,
+                           "precision qualifiers are forbidden");
+   }
+
+   bool check_bitwise_operations_allowed(YYLTYPE *locp)
+   {
+      return check_version(130, 300, locp, "bit-wise operations are forbidden");
+   }
+
+   void process_version_directive(YYLTYPE *locp, int version,
+                                  const char *ident);
+
    struct gl_context *const ctx;
    void *scanner;
    exec_list translation_unit;
@@ -88,9 +150,15 @@ struct _mesa_glsl_parse_state {
 
    bool es_shader;
    unsigned language_version;
-   const char *version_string;
    enum _mesa_glsl_parser_targets target;
 
+   /**
+    * Default uniform layout qualifiers tracked during parsing.
+    * Currently affects uniform blocks and uniform buffer variables in
+    * those blocks.
+    */
+   struct ast_type_qualifier *default_uniform_qualifier;
+
    /**
     * Printable list of GLSL versions supported by the current context
     *
@@ -123,22 +191,9 @@ struct _mesa_glsl_parse_state {
       /* ARB_draw_buffers */
       unsigned MaxDrawBuffers;
 
-      /**
-       * Set of GLSL versions supported by the current context
-       *
-       * Knowing that version X is supported doesn't mean that versions before
-       * X are also supported.  Version 1.00 is only supported in an ES2
-       * context or when GL_ARB_ES2_compatibility is supported.  In an OpenGL
-       * 3.0 "forward compatible" context, GLSL 1.10 and 1.20 are \b not
-       * supported.
-       */
-      /*@{*/
-      unsigned GLSL_100ES:1;
-      unsigned GLSL_110:1;
-      unsigned GLSL_120:1;
-      unsigned GLSL_130:1;
-      unsigned GLSL_140:1;
-      /*@}*/
+      /* 3.00 ES */
+      int MinProgramTexelOffset;
+      int MaxProgramTexelOffset;
    } Const;
 
    /**
@@ -213,6 +268,12 @@ struct _mesa_glsl_parse_state {
    bool ARB_shader_bit_encoding_warn;
    bool ARB_uniform_buffer_object_enable;
    bool ARB_uniform_buffer_object_warn;
+   bool OES_standard_derivatives_enable;
+   bool OES_standard_derivatives_warn;
+   bool ARB_texture_cube_map_array_enable;
+   bool ARB_texture_cube_map_array_warn;
+   bool ARB_shading_language_packing_enable;
+   bool ARB_shading_language_packing_warn;
    /*@}*/
 
    /** Extensions supported by the OpenGL implementation. */
@@ -223,16 +284,6 @@ struct _mesa_glsl_parse_state {
    unsigned num_builtins_to_link;
 };
 
-typedef struct YYLTYPE {
-   int first_line;
-   int first_column;
-   int last_line;
-   int last_column;
-   unsigned source;
-} YYLTYPE;
-# define YYLTYPE_IS_DECLARED 1
-# define YYLTYPE_IS_TRIVIAL 1
-
 # define YYLLOC_DEFAULT(Current, Rhs, N)                       \
 do {                                                           \
    if (N)                                                      \
@@ -304,8 +355,8 @@ _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
 extern "C" {
 #endif
 
-extern int preprocess(void *ctx, const char **shader, char **info_log,
-                      const struct gl_extensions *extensions, int api);
+extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
+                      const struct gl_extensions *extensions, struct gl_context *gl_ctx);
 
 extern void _mesa_destroy_shader_compiler(void);
 extern void _mesa_destroy_shader_compiler_caches(void);