glapi: Move to src/mapi/.

Move glapi to src/mapi/{glapi,es1api,es2api}.

1 files changed, 695 insertions, 0 deletions

diff --git a/src/mapi/glapi/glapi_getproc.c b/src/mapi/glapi/glapi_getproc.c
new file mode 100644
index 00000000000..c73e8dd3b04
--- /dev/null
+++ b/src/mapi/glapi/glapi_getproc.c
@@ -0,0 +1,695 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   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"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file glapi_getproc.c
+ *
+ * Code for implementing glXGetProcAddress(), etc.
+ * This was originally in glapi.c but refactored out.
+ */
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#include "glapi/mesa.h"
+#else
+#include "main/glheader.h"
+#include "main/compiler.h"
+#endif
+
+#include "glapi/glapi.h"
+#include "glapi/glapi_priv.h"
+#include "glapi/glapitable.h"
+#include "glapi/glapioffsets.h"
+
+
+/**********************************************************************
+ * Static function management.
+ */
+
+
+#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server)
+# define NEED_FUNCTION_POINTER
+#endif
+#include "glapi/glprocs.h"
+
+
+/**
+ * Search the table of static entrypoint functions for the named function
+ * and return the corresponding glprocs_table_t entry.
+ */
+static const glprocs_table_t *
+get_static_proc( const char * n )
+{
+   GLuint i;
+   for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+      const char *testName = gl_string_table + static_functions[i].Name_offset;
+#ifdef MANGLE
+      /* skip the prefix on the name */
+      if (strcmp(testName, n + 1) == 0)
+#else
+      if (strcmp(testName, n) == 0)
+#endif
+      {
+	 return &static_functions[i];
+      }
+   }
+   return NULL;
+}
+
+
+/**
+ * Return dispatch table offset of the named static (built-in) function.
+ * Return -1 if function not found.
+ */
+static GLint
+get_static_proc_offset(const char *funcName)
+{
+   const glprocs_table_t * const f = get_static_proc( funcName );
+   if (f == NULL) {
+      return -1;
+   }
+
+   return f->Offset;
+}
+
+
+#if !defined(XFree86Server)
+
+/**
+ * Return dispatch function address for the named static (built-in) function.
+ * Return NULL if function not found.
+ */
+static _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+   const glprocs_table_t * const f = get_static_proc( funcName );
+   if (f == NULL) {
+      return NULL;
+   }
+
+#if defined(DISPATCH_FUNCTION_SIZE) && defined(GLX_INDIRECT_RENDERING)
+   return (f->Address == NULL)
+      ? get_entrypoint_address(f->Offset)
+      : f->Address;
+#elif defined(DISPATCH_FUNCTION_SIZE)
+   return get_entrypoint_address(f->Offset);
+#else
+   return f->Address;
+#endif
+}
+
+#else
+
+static _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+   (void) funcName;
+   return NULL;
+}
+
+#endif /* !defined(XFree86Server) */
+
+
+/**
+ * Return the name of the function at the given offset in the dispatch
+ * table.  For debugging only.
+ */
+static const char *
+get_static_proc_name( GLuint offset )
+{
+   GLuint i;
+   for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+      if (static_functions[i].Offset == offset) {
+	 return gl_string_table + static_functions[i].Name_offset;
+      }
+   }
+   return NULL;
+}
+
+
+
+/**********************************************************************
+ * Extension function management.
+ */
+
+
+/**
+ * Track information about a function added to the GL API.
+ */
+struct _glapi_function {
+   /**
+    * Name of the function.
+    */
+   const char * name;
+
+
+   /**
+    * Text string that describes the types of the parameters passed to the
+    * named function.   Parameter types are converted to characters using the
+    * following rules:
+    *   - 'i' for \c GLint, \c GLuint, and \c GLenum
+    *   - 'p' for any pointer type
+    *   - 'f' for \c GLfloat and \c GLclampf
+    *   - 'd' for \c GLdouble and \c GLclampd
+    */
+   const char * parameter_signature;
+
+
+   /**
+    * Offset in the dispatch table where the pointer to the real function is
+    * located.  If the driver has not requested that the named function be
+    * added to the dispatch table, this will have the value ~0.
+    */
+   unsigned dispatch_offset;
+
+
+   /**
+    * Pointer to the dispatch stub for the named function.
+    * 
+    * \todo
+    * The semantic of this field should be changed slightly.  Currently, it
+    * is always expected to be non-\c NULL.  However, it would be better to
+    * only allocate the entry-point stub when the application requests the
+    * function via \c glXGetProcAddress.  This would save memory for all the
+    * functions that the driver exports but that the application never wants
+    * to call.
+    */
+   _glapi_proc dispatch_stub;
+};
+
+
+static struct _glapi_function ExtEntryTable[MAX_EXTENSION_FUNCS];
+static GLuint NumExtEntryPoints = 0;
+
+
+static struct _glapi_function *
+get_extension_proc(const char *funcName)
+{
+   GLuint i;
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
+         return & ExtEntryTable[i];
+      }
+   }
+   return NULL;
+}
+
+
+static GLint
+get_extension_proc_offset(const char *funcName)
+{
+   const struct _glapi_function * const f = get_extension_proc( funcName );
+   if (f == NULL) {
+      return -1;
+   }
+
+   return f->dispatch_offset;
+}
+
+
+static _glapi_proc
+get_extension_proc_address(const char *funcName)
+{
+   const struct _glapi_function * const f = get_extension_proc( funcName );
+   if (f == NULL) {
+      return NULL;
+   }
+
+   return f->dispatch_stub;
+}
+
+
+static const char *
+get_extension_proc_name(GLuint offset)
+{
+   GLuint i;
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (ExtEntryTable[i].dispatch_offset == offset) {
+         return ExtEntryTable[i].name;
+      }
+   }
+   return NULL;
+}
+
+
+/**
+ * strdup() is actually not a standard ANSI C or POSIX routine.
+ * Irix will not define it if ANSI mode is in effect.
+ */
+static char *
+str_dup(const char *str)
+{
+   char *copy;
+   copy = (char*) malloc(strlen(str) + 1);
+   if (!copy)
+      return NULL;
+   strcpy(copy, str);
+   return copy;
+}
+
+
+/**
+ * Generate new entrypoint
+ *
+ * Use a temporary dispatch offset of ~0 (i.e. -1).  Later, when the driver
+ * calls \c _glapi_add_dispatch we'll put in the proper offset.  If that
+ * never happens, and the user calls this function, he'll segfault.  That's
+ * what you get when you try calling a GL function that doesn't really exist.
+ * 
+ * \param funcName  Name of the function to create an entry-point for.
+ * 
+ * \sa _glapi_add_entrypoint
+ */
+
+static struct _glapi_function *
+add_function_name( const char * funcName )
+{
+   struct _glapi_function * entry = NULL;
+   _glapi_proc entrypoint = NULL;
+   char * name_dup = NULL;
+
+   if (NumExtEntryPoints >= MAX_EXTENSION_FUNCS)
+      return NULL;
+
+   if (funcName == NULL)
+      return NULL;
+
+   name_dup = str_dup(funcName);
+   if (name_dup == NULL)
+      return NULL;
+
+   entrypoint = generate_entrypoint(~0);
+
+   if (entrypoint == NULL) {
+      free(name_dup);
+      return NULL;
+   }
+
+   entry = & ExtEntryTable[NumExtEntryPoints];
+   NumExtEntryPoints++;
+
+   entry->name = name_dup;
+   entry->parameter_signature = NULL;
+   entry->dispatch_offset = ~0;
+   entry->dispatch_stub = entrypoint;
+
+   return entry;
+}
+
+
+static struct _glapi_function *
+set_entry_info( struct _glapi_function * entry, const char * signature, unsigned offset )
+{
+   char * sig_dup = NULL;
+
+   if (signature == NULL)
+      return NULL;
+
+   sig_dup = str_dup(signature);
+   if (sig_dup == NULL)
+      return NULL;
+
+   fill_in_entrypoint_offset(entry->dispatch_stub, offset);
+
+   entry->parameter_signature = sig_dup;
+   entry->dispatch_offset = offset;
+
+   return entry;
+}
+
+
+/**
+ * Fill-in the dispatch stub for the named function.
+ * 
+ * This function is intended to be called by a hardware driver.  When called,
+ * a dispatch stub may be created created for the function.  A pointer to this
+ * dispatch function will be returned by glXGetProcAddress.
+ *
+ * \param function_names       Array of pointers to function names that should
+ *                             share a common dispatch offset.
+ * \param parameter_signature  String representing the types of the parameters
+ *                             passed to the named function.  Parameter types
+ *                             are converted to characters using the following
+ *                             rules:
+ *                               - 'i' for \c GLint, \c GLuint, and \c GLenum
+ *                               - 'p' for any pointer type
+ *                               - 'f' for \c GLfloat and \c GLclampf
+ *                               - 'd' for \c GLdouble and \c GLclampd
+ *
+ * \returns
+ * The offset in the dispatch table of the named function.  A pointer to the
+ * driver's implementation of the named function should be stored at
+ * \c dispatch_table[\c offset].  Return -1 if error/problem.
+ *
+ * \sa glXGetProcAddress
+ *
+ * \warning
+ * This function can only handle up to 8 names at a time.  As far as I know,
+ * the maximum number of names ever associated with an existing GL function is
+ * 4 (\c glPointParameterfSGIS, \c glPointParameterfEXT,
+ * \c glPointParameterfARB, and \c glPointParameterf), so this should not be
+ * too painful of a limitation.
+ *
+ * \todo
+ * Determine whether or not \c parameter_signature should be allowed to be
+ * \c NULL.  It doesn't seem like much of a hardship for drivers to have to
+ * pass in an empty string.
+ *
+ * \todo
+ * Determine if code should be added to reject function names that start with
+ * 'glX'.
+ * 
+ * \bug
+ * Add code to compare \c parameter_signature with the parameter signature of
+ * a static function.  In order to do that, we need to find a way to \b get
+ * the parameter signature of a static function.
+ */
+
+PUBLIC int
+_glapi_add_dispatch( const char * const * function_names,
+		     const char * parameter_signature )
+{
+   static int next_dynamic_offset = _gloffset_FIRST_DYNAMIC;
+   const char * const real_sig = (parameter_signature != NULL)
+     ? parameter_signature : "";
+   struct _glapi_function * entry[8];
+   GLboolean is_static[8];
+   unsigned i;
+   int offset = ~0;
+
+   init_glapi_relocs_once();
+
+   (void) memset( is_static, 0, sizeof( is_static ) );
+   (void) memset( entry, 0, sizeof( entry ) );
+
+   /* Find the _single_ dispatch offset for all function names that already
+    * exist (and have a dispatch offset).
+    */
+
+   for ( i = 0 ; function_names[i] != NULL ; i++ ) {
+      const char * funcName = function_names[i];
+      int static_offset;
+      int extension_offset;
+
+      if (funcName[0] != 'g' || funcName[1] != 'l')
+         return -1;
+
+      /* search built-in functions */
+      static_offset = get_static_proc_offset(funcName);
+
+      if (static_offset >= 0) {
+
+	 is_static[i] = GL_TRUE;
+
+	 /* FIXME: Make sure the parameter signatures match!  How do we get
+	  * FIXME: the parameter signature for static functions?
+	  */
+
+	 if ( (offset != ~0) && (static_offset != offset) ) {
+	    return -1;
+	 }
+
+	 offset = static_offset;
+
+	 continue;
+      }
+
+      /* search added extension functions */
+      entry[i] = get_extension_proc(funcName);
+
+      if (entry[i] != NULL) {
+	 extension_offset = entry[i]->dispatch_offset;
+
+	 /* The offset may be ~0 if the function name was added by
+	  * glXGetProcAddress but never filled in by the driver.
+	  */
+
+	 if (extension_offset == ~0) {
+	    continue;
+	 }
+
+	 if (strcmp(real_sig, entry[i]->parameter_signature) != 0) {
+	    return -1;
+	 }
+
+	 if ( (offset != ~0) && (extension_offset != offset) ) {
+	    return -1;
+	 }
+
+	 offset = extension_offset;
+      }
+   }
+
+   /* If all function names are either new (or with no dispatch offset),
+    * allocate a new dispatch offset.
+    */
+
+   if (offset == ~0) {
+      offset = next_dynamic_offset;
+      next_dynamic_offset++;
+   }
+
+   /* Fill in the dispatch offset for the new function names (and those with
+    * no dispatch offset).
+    */
+
+   for ( i = 0 ; function_names[i] != NULL ; i++ ) {
+      if (is_static[i]) {
+	 continue;
+      }
+
+      /* generate entrypoints for new function names */
+      if (entry[i] == NULL) {
+	 entry[i] = add_function_name( function_names[i] );
+	 if (entry[i] == NULL) {
+	    /* FIXME: Possible memory leak here. */
+	    return -1;
+	 }
+      }
+
+      if (entry[i]->dispatch_offset == ~0) {
+	 set_entry_info( entry[i], real_sig, offset );
+      }
+   }
+
+   return offset;
+}
+
+
+/**
+ * Return offset of entrypoint for named function within dispatch table.
+ */
+PUBLIC GLint
+_glapi_get_proc_offset(const char *funcName)
+{
+   GLint offset;
+
+   /* search extension functions first */
+   offset = get_extension_proc_offset(funcName);
+   if (offset >= 0)
+      return offset;
+
+   /* search static functions */
+   return get_static_proc_offset(funcName);
+}
+
+
+
+/**
+ * Return pointer to the named function.  If the function name isn't found
+ * in the name of static functions, try generating a new API entrypoint on
+ * the fly with assembly language.
+ */
+PUBLIC _glapi_proc
+_glapi_get_proc_address(const char *funcName)
+{
+   _glapi_proc func;
+   struct _glapi_function * entry;
+
+   init_glapi_relocs_once();
+
+#ifdef MANGLE
+   /* skip the prefix on the name */
+   if (funcName[1] != 'g' || funcName[2] != 'l')
+      return NULL;
+#else
+   if (funcName[0] != 'g' || funcName[1] != 'l')
+      return NULL;
+#endif
+
+   /* search extension functions first */
+   func = get_extension_proc_address(funcName);
+   if (func)
+      return func;
+
+   /* search static functions */
+   func = get_static_proc_address(funcName);
+   if (func)
+      return func;
+
+   /* generate entrypoint, dispatch offset must be filled in by the driver */
+   entry = add_function_name(funcName);
+   if (entry == NULL)
+      return NULL;
+
+   return entry->dispatch_stub;
+}
+
+
+
+/**
+ * Return the name of the function at the given dispatch offset.
+ * This is only intended for debugging.
+ */
+const char *
+_glapi_get_proc_name(GLuint offset)
+{
+   const char * n;
+
+   /* search built-in functions */
+   n = get_static_proc_name(offset);
+   if ( n != NULL ) {
+      return n;
+   }
+
+   /* search added extension functions */
+   return get_extension_proc_name(offset);
+}
+
+
+
+/**********************************************************************
+ * GL API table functions.
+ */
+
+
+/*
+ * The dispatch table size (number of entries) is the size of the
+ * _glapi_table struct plus the number of dynamic entries we can add.
+ * The extra slots can be filled in by DRI drivers that register new extension
+ * functions.
+ */
+#define DISPATCH_TABLE_SIZE (sizeof(struct _glapi_table) / sizeof(void *) + MAX_EXTENSION_FUNCS)
+
+
+/**
+ * Return size of dispatch table struct as number of functions (or
+ * slots).
+ */
+PUBLIC GLuint
+_glapi_get_dispatch_table_size(void)
+{
+   return DISPATCH_TABLE_SIZE;
+}
+
+
+/**
+ * Make sure there are no NULL pointers in the given dispatch table.
+ * Intended for debugging purposes.
+ */
+void
+_glapi_check_table_not_null(const struct _glapi_table *table)
+{
+#ifdef EXTRA_DEBUG /* set to DEBUG for extra DEBUG */
+   const GLuint entries = _glapi_get_dispatch_table_size();
+   const void **tab = (const void **) table;
+   GLuint i;
+   for (i = 1; i < entries; i++) {
+      assert(tab[i]);
+   }
+#else
+   (void) table;
+#endif
+}
+
+
+/**
+ * Do some spot checks to be sure that the dispatch table
+ * slots are assigned correctly. For debugging only.
+ */
+void
+_glapi_check_table(const struct _glapi_table *table)
+{
+#ifdef EXTRA_DEBUG /* set to DEBUG for extra DEBUG */
+   {
+      GLuint BeginOffset = _glapi_get_proc_offset("glBegin");
+      char *BeginFunc = (char*) &table->Begin;
+      GLuint offset = (BeginFunc - (char *) table) / sizeof(void *);
+      assert(BeginOffset == _gloffset_Begin);
+      assert(BeginOffset == offset);
+   }
+   {
+      GLuint viewportOffset = _glapi_get_proc_offset("glViewport");
+      char *viewportFunc = (char*) &table->Viewport;
+      GLuint offset = (viewportFunc - (char *) table) / sizeof(void *);
+      assert(viewportOffset == _gloffset_Viewport);
+      assert(viewportOffset == offset);
+   }
+   {
+      GLuint VertexPointerOffset = _glapi_get_proc_offset("glVertexPointer");
+      char *VertexPointerFunc = (char*) &table->VertexPointer;
+      GLuint offset = (VertexPointerFunc - (char *) table) / sizeof(void *);
+      assert(VertexPointerOffset == _gloffset_VertexPointer);
+      assert(VertexPointerOffset == offset);
+   }
+   {
+      GLuint ResetMinMaxOffset = _glapi_get_proc_offset("glResetMinmax");
+      char *ResetMinMaxFunc = (char*) &table->ResetMinmax;
+      GLuint offset = (ResetMinMaxFunc - (char *) table) / sizeof(void *);
+      assert(ResetMinMaxOffset == _gloffset_ResetMinmax);
+      assert(ResetMinMaxOffset == offset);
+   }
+   {
+      GLuint blendColorOffset = _glapi_get_proc_offset("glBlendColor");
+      char *blendColorFunc = (char*) &table->BlendColor;
+      GLuint offset = (blendColorFunc - (char *) table) / sizeof(void *);
+      assert(blendColorOffset == _gloffset_BlendColor);
+      assert(blendColorOffset == offset);
+   }
+   {
+      GLuint secondaryColor3fOffset = _glapi_get_proc_offset("glSecondaryColor3fEXT");
+      char *secondaryColor3fFunc = (char*) &table->SecondaryColor3fEXT;
+      GLuint offset = (secondaryColor3fFunc - (char *) table) / sizeof(void *);
+      assert(secondaryColor3fOffset == _gloffset_SecondaryColor3fEXT);
+      assert(secondaryColor3fOffset == offset);
+   }
+   {
+      GLuint pointParameterivOffset = _glapi_get_proc_offset("glPointParameterivNV");
+      char *pointParameterivFunc = (char*) &table->PointParameterivNV;
+      GLuint offset = (pointParameterivFunc - (char *) table) / sizeof(void *);
+      assert(pointParameterivOffset == _gloffset_PointParameterivNV);
+      assert(pointParameterivOffset == offset);
+   }
+   {
+      GLuint setFenceOffset = _glapi_get_proc_offset("glSetFenceNV");
+      char *setFenceFunc = (char*) &table->SetFenceNV;
+      GLuint offset = (setFenceFunc - (char *) table) / sizeof(void *);
+      assert(setFenceOffset == _gloffset_SetFenceNV);
+      assert(setFenceOffset == offset);
+   }
+#else
+   (void) table;
+#endif
+}