diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/glapi/glapi.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/glapi/glapi.c | 1058 |
1 files changed, 0 insertions, 1058 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/glapi/glapi.c b/nx-X11/extras/Mesa/src/mesa/glapi/glapi.c deleted file mode 100644 index 39eb9b91b..000000000 --- a/nx-X11/extras/Mesa/src/mesa/glapi/glapi.c +++ /dev/null @@ -1,1058 +0,0 @@ -/* - * Mesa 3-D graphics library - * Version: 6.3 - * - * Copyright (C) 1999-2003 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. - */ - - -/* - * This file manages the OpenGL API dispatch layer. - * The dispatch table (struct _glapi_table) is basically just a list - * of function pointers. - * There are functions to set/get the current dispatch table for the - * current thread and to manage registration/dispatch of dynamically - * added extension functions. - * - * It's intended that this file and the other glapi*.[ch] files are - * flexible enough to be reused in several places: XFree86, DRI- - * based libGL.so, and perhaps the SGI SI. - * - * NOTE: There are no dependencies on Mesa in this code. - * - * Versions (API changes): - * 2000/02/23 - original version for Mesa 3.3 and XFree86 4.0 - * 2001/01/16 - added dispatch override feature for Mesa 3.5 - * 2002/06/28 - added _glapi_set_warning_func(), Mesa 4.1. - * 2002/10/01 - _glapi_get_proc_address() will now generate new entrypoints - * itself (using offset ~0). _glapi_add_entrypoint() can be - * called afterward and it'll fill in the correct dispatch - * offset. This allows DRI libGL to avoid probing for DRI - * drivers! No changes to the public glapi interface. - */ - - - -#include "glheader.h" -#include "glapi.h" -#include "glapioffsets.h" -#include "glapitable.h" -#include "glthread.h" - -/***** BEGIN NO-OP DISPATCH *****/ - -static GLboolean WarnFlag = GL_FALSE; -static _glapi_warning_func warning_func; - -static void init_glapi_relocs(void); - -static _glapi_proc generate_entrypoint(GLuint functionOffset); -static void fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset); - -/* - * Enable/disable printing of warning messages. - */ -PUBLIC void -_glapi_noop_enable_warnings(GLboolean enable) -{ - WarnFlag = enable; -} - -/* - * Register a callback function for reporting errors. - */ -PUBLIC void -_glapi_set_warning_func( _glapi_warning_func func ) -{ - warning_func = func; -} - -static GLboolean -warn(void) -{ - if ((WarnFlag || getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) - && warning_func) { - return GL_TRUE; - } - else { - return GL_FALSE; - } -} - - -#define KEYWORD1 static -#define KEYWORD2 GLAPIENTRY -#define NAME(func) NoOp##func - -#define F NULL - -#define DISPATCH(func, args, msg) \ - if (warn()) { \ - warning_func(NULL, "GL User Error: called without context: %s", #func); \ - } - -#define RETURN_DISPATCH(func, args, msg) \ - if (warn()) { \ - warning_func(NULL, "GL User Error: called without context: %s", #func); \ - } \ - return 0 - -#define DISPATCH_TABLE_NAME __glapi_noop_table -#define UNUSED_TABLE_NAME __unused_noop_functions - -#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name - -static GLint NoOpUnused(void) -{ - if (warn()) { - warning_func(NULL, "GL User Error: calling extension function without a current context\n"); - } - return 0; -} - -#include "glapitemp.h" - -/***** END NO-OP DISPATCH *****/ - - - -/** - * \name Current dispatch and current context control variables - * - * Depending on whether or not multithreading is support, and the type of - * support available, several variables are used to store the current context - * pointer and the current dispatch table pointer. In the non-threaded case, - * the variables \c _glapi_Dispatch and \c _glapi_Context are used for this - * purpose. - * - * In the "normal" threaded case, the variables \c _glapi_Dispatch and - * \c _glapi_Context will be \c NULL if an application is detected as being - * multithreaded. Single-threaded applications will use \c _glapi_Dispatch - * and \c _glapi_Context just like the case without any threading support. - * When \c _glapi_Dispatch and \c _glapi_Context are \c NULL, the thread state - * data \c _gl_DispatchTSD and \c ContextTSD are used. Drivers and the - * static dispatch functions access these variables via \c _glapi_get_dispatch - * and \c _glapi_get_context. - * - * There is a race condition in setting \c _glapi_Dispatch to \c NULL. It is - * possible for the original thread to be setting it at the same instant a new - * thread, perhaps running on a different processor, is clearing it. Because - * of that, \c ThreadSafe, which can only ever be changed to \c GL_TRUE, is - * used to determine whether or not the application is multithreaded. - * - * In the TLS case, the variables \c _glapi_Dispatch and \c _glapi_Context are - * hardcoded to \c NULL. Instead the TLS variables \c _glapi_tls_Dispatch and - * \c _glapi_tls_Context are used. Having \c _glapi_Dispatch and - * \c _glapi_Context be hardcoded to \c NULL maintains binary compatability - * between TLS enabled loaders and non-TLS DRI drivers. - */ -/*@{*/ -#if defined(GLX_USE_TLS) - -PUBLIC __thread struct _glapi_table * _glapi_tls_Dispatch - __attribute__((tls_model("initial-exec"))) - = (struct _glapi_table *) __glapi_noop_table; - -PUBLIC __thread void * _glapi_tls_Context - __attribute__((tls_model("initial-exec"))); - -PUBLIC const struct _glapi_table *_glapi_Dispatch = NULL; -PUBLIC const void *_glapi_Context = NULL; - -#else - -#if defined(THREADS) - -static GLboolean ThreadSafe = GL_FALSE; /**< In thread-safe mode? */ -_glthread_TSD _gl_DispatchTSD; /**< Per-thread dispatch pointer */ -static _glthread_TSD ContextTSD; /**< Per-thread context pointer */ - -#endif /* defined(THREADS) */ - -PUBLIC struct _glapi_table *_glapi_Dispatch = - (struct _glapi_table *) __glapi_noop_table; -PUBLIC void *_glapi_Context = NULL; - -#endif /* defined(GLX_USE_TLS) */ -/*@}*/ - - -/** - * 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; -} - - - -/** - * We should call this periodically from a function such as glXMakeCurrent - * in order to test if multiple threads are being used. - */ -void -_glapi_check_multithread(void) -{ -#if defined(THREADS) && !defined(GLX_USE_TLS) - if (!ThreadSafe) { - static unsigned long knownID; - static GLboolean firstCall = GL_TRUE; - if (firstCall) { - knownID = _glthread_GetID(); - firstCall = GL_FALSE; - } - else if (knownID != _glthread_GetID()) { - ThreadSafe = GL_TRUE; - _glapi_set_dispatch(NULL); - } - } - else if (!_glapi_get_dispatch()) { - /* make sure that this thread's dispatch pointer isn't null */ - _glapi_set_dispatch(NULL); - } -#endif -} - - - -/** - * Set the current context pointer for this thread. - * The context pointer is an opaque type which should be cast to - * void from the real context pointer type. - */ -PUBLIC void -_glapi_set_context(void *context) -{ - (void) __unused_noop_functions; /* silence a warning */ -#if defined(GLX_USE_TLS) - _glapi_tls_Context = context; -#elif defined(THREADS) - _glthread_SetTSD(&ContextTSD, context); - _glapi_Context = (ThreadSafe) ? NULL : context; -#else - _glapi_Context = context; -#endif -} - - - -/** - * Get the current context pointer for this thread. - * The context pointer is an opaque type which should be cast from - * void to the real context pointer type. - */ -PUBLIC void * -_glapi_get_context(void) -{ -#if defined(GLX_USE_TLS) - return _glapi_tls_Context; -#elif defined(THREADS) - if (ThreadSafe) { - return _glthread_GetTSD(&ContextTSD); - } - else { - return _glapi_Context; - } -#else - return _glapi_Context; -#endif -} - - - -/** - * Set the global or per-thread dispatch table pointer. - */ -PUBLIC void -_glapi_set_dispatch(struct _glapi_table *dispatch) -{ -#if defined(PTHREADS) || defined(GLX_USE_TLS) - static pthread_once_t once_control = PTHREAD_ONCE_INIT; - - - pthread_once( & once_control, init_glapi_relocs ); -#endif - - if (!dispatch) { - /* use the no-op functions */ - dispatch = (struct _glapi_table *) __glapi_noop_table; - } -#ifdef DEBUG - else { - _glapi_check_table(dispatch); - } -#endif - -#if defined(GLX_USE_TLS) - _glapi_tls_Dispatch = dispatch; -#elif defined(THREADS) - _glthread_SetTSD(&_gl_DispatchTSD, (void *) dispatch); - _glapi_Dispatch = (ThreadSafe) ? NULL : dispatch; -#else /*THREADS*/ - _glapi_Dispatch = dispatch; -#endif /*THREADS*/ -} - - - -/** - * Return pointer to current dispatch table for calling thread. - */ -PUBLIC struct _glapi_table * -_glapi_get_dispatch(void) -{ - struct _glapi_table * api; - -#if defined(GLX_USE_TLS) - api = _glapi_tls_Dispatch; -#elif defined(THREADS) - api = (ThreadSafe) - ? (struct _glapi_table *) _glthread_GetTSD(&_gl_DispatchTSD) - : _glapi_Dispatch; -#else - api = _glapi_Dispatch; -#endif - - assert( api != NULL ); - return api; -} - - -#if !defined( USE_X86_ASM ) && !defined( XFree86Server ) -#define NEED_FUNCTION_POINTER -#endif - -/* The code in this file is auto-generated with Python */ -#include "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 * -find_entry( const char * n ) -{ - GLuint i; - - for (i = 0; static_functions[i].Name_offset >= 0; i++) { - const char * test_name; - - test_name = gl_string_table + static_functions[i].Name_offset; - if (strcmp(test_name, n) == 0) { - 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 = find_entry( funcName ); - - if ( f != NULL ) { - return f->Offset; - } - return -1; -} - - -#if !defined( XFree86Server ) -#ifdef USE_X86_ASM - -#if defined( GLX_USE_TLS ) -extern GLubyte gl_dispatch_functions_start[]; -extern GLubyte gl_dispatch_functions_end[]; -#else -extern const GLubyte gl_dispatch_functions_start[]; -#endif - -# if defined(THREADS) && !defined(GLX_USE_TLS) -# define X86_DISPATCH_FUNCTION_SIZE 32 -# else -# define X86_DISPATCH_FUNCTION_SIZE 16 -# endif - - -/** - * Return dispatch function address the named static (built-in) function. - * Return NULL if function not found. - */ -static const _glapi_proc -get_static_proc_address(const char *funcName) -{ - const glprocs_table_t * const f = find_entry( funcName ); - - if ( f != NULL ) { - return (_glapi_proc) (gl_dispatch_functions_start - + (X86_DISPATCH_FUNCTION_SIZE * f->Offset)); - } - else { - return NULL; - } -} - -#else - - -/** - * Return pointer to the named static (built-in) function. - * \return NULL if function not found. - */ -static const _glapi_proc -get_static_proc_address(const char *funcName) -{ - const glprocs_table_t * const f = find_entry( funcName ); - return ( f != NULL ) ? f->Address : NULL; -} - -#endif /* USE_X86_ASM */ -#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. - */ - -/* - * Number of extension functions which we can dynamically add at runtime. - */ -#define MAX_EXTENSION_FUNCS 300 - - -/* - * 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) - - -/** - * 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; - -#ifdef USE_SPARC_ASM -extern void __glapi_sparc_icache_flush(unsigned int *); -#endif - -/** - * Generate a dispatch function (entrypoint) which jumps through - * the given slot number (offset) in the current dispatch table. - * We need assembly language in order to accomplish this. - */ -static _glapi_proc -generate_entrypoint(GLuint functionOffset) -{ -#if defined(USE_X86_ASM) - /* 32 is chosen as something of a magic offset. For x86, the dispatch - * at offset 32 is the first one where the offset in the - * "jmp OFFSET*4(%eax)" can't be encoded in a single byte. - */ - const GLubyte * const template_func = gl_dispatch_functions_start - + (X86_DISPATCH_FUNCTION_SIZE * 32); - GLubyte * const code = (GLubyte *) malloc( X86_DISPATCH_FUNCTION_SIZE ); - - - if ( code != NULL ) { - (void) memcpy( code, template_func, X86_DISPATCH_FUNCTION_SIZE ); - fill_in_entrypoint_offset( (_glapi_proc) code, functionOffset ); - } - - return (_glapi_proc) code; -#elif defined(USE_SPARC_ASM) - -#ifdef __arch64__ - static const unsigned int insn_template[] = { - 0x05000000, /* sethi %uhi(_glapi_Dispatch), %g2 */ - 0x03000000, /* sethi %hi(_glapi_Dispatch), %g1 */ - 0x8410a000, /* or %g2, %ulo(_glapi_Dispatch), %g2 */ - 0x82106000, /* or %g1, %lo(_glapi_Dispatch), %g1 */ - 0x8528b020, /* sllx %g2, 32, %g2 */ - 0xc2584002, /* ldx [%g1 + %g2], %g1 */ - 0x05000000, /* sethi %hi(8 * glapioffset), %g2 */ - 0x8410a000, /* or %g2, %lo(8 * glapioffset), %g2 */ - 0xc6584002, /* ldx [%g1 + %g2], %g3 */ - 0x81c0c000, /* jmpl %g3, %g0 */ - 0x01000000 /* nop */ - }; -#else - static const unsigned int insn_template[] = { - 0x03000000, /* sethi %hi(_glapi_Dispatch), %g1 */ - 0xc2006000, /* ld [%g1 + %lo(_glapi_Dispatch)], %g1 */ - 0xc6006000, /* ld [%g1 + %lo(4*glapioffset)], %g3 */ - 0x81c0c000, /* jmpl %g3, %g0 */ - 0x01000000 /* nop */ - }; -#endif - unsigned int *code = (unsigned int *) malloc(sizeof(insn_template)); - unsigned long glapi_addr = (unsigned long) &_glapi_Dispatch; - if (code) { - memcpy(code, insn_template, sizeof(insn_template)); - -#ifdef __arch64__ - code[0] |= (glapi_addr >> (32 + 10)); - code[1] |= ((glapi_addr & 0xffffffff) >> 10); - __glapi_sparc_icache_flush(&code[0]); - code[2] |= ((glapi_addr >> 32) & ((1 << 10) - 1)); - code[3] |= (glapi_addr & ((1 << 10) - 1)); - __glapi_sparc_icache_flush(&code[2]); - code[6] |= ((functionOffset * 8) >> 10); - code[7] |= ((functionOffset * 8) & ((1 << 10) - 1)); - __glapi_sparc_icache_flush(&code[6]); -#else - code[0] |= (glapi_addr >> 10); - code[1] |= (glapi_addr & ((1 << 10) - 1)); - __glapi_sparc_icache_flush(&code[0]); - code[2] |= (functionOffset * 4); - __glapi_sparc_icache_flush(&code[2]); -#endif - } - return (_glapi_proc) code; -#else - (void) functionOffset; - return NULL; -#endif /* USE_*_ASM */ -} - - -/** - * This function inserts a new dispatch offset into the assembly language - * stub that was generated with the preceeding function. - */ -static void -fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset) -{ -#if defined(USE_X86_ASM) - GLubyte * const code = (GLubyte *) entrypoint; - - -#if X86_DISPATCH_FUNCTION_SIZE == 32 - *((unsigned int *)(code + 11)) = 4 * offset; - *((unsigned int *)(code + 22)) = 4 * offset; -#elif X86_DISPATCH_FUNCTION_SIZE == 16 && defined( GLX_USE_TLS ) - *((unsigned int *)(code + 8)) = 4 * offset; -#elif X86_DISPATCH_FUNCTION_SIZE == 16 - *((unsigned int *)(code + 7)) = 4 * offset; -#else -# error Invalid X86_DISPATCH_FUNCTION_SIZE! -#endif - -#elif defined(USE_SPARC_ASM) - - /* XXX this hasn't been tested! */ - unsigned int *code = (unsigned int *) entrypoint; -#ifdef __arch64__ - code[6] = 0x05000000; /* sethi %hi(8 * glapioffset), %g2 */ - code[7] = 0x8410a000; /* or %g2, %lo(8 * glapioffset), %g2 */ - code[6] |= ((offset * 8) >> 10); - code[7] |= ((offset * 8) & ((1 << 10) - 1)); - __glapi_sparc_icache_flush(&code[6]); -#else /* __arch64__ */ - code[2] = 0xc6006000; /* ld [%g1 + %lo(4*glapioffset)], %g3 */ - code[2] |= (offset * 4); - __glapi_sparc_icache_flush(&code[2]); -#endif /* __arch64__ */ - -#else - - /* an unimplemented architecture */ - (void) entrypoint; - (void) offset; - -#endif /* USE_*_ASM */ -} - - -/** - * 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; - - if (NumExtEntryPoints < MAX_EXTENSION_FUNCS) { - _glapi_proc entrypoint = generate_entrypoint(~0); - if (entrypoint != NULL) { - entry = & ExtEntryTable[NumExtEntryPoints]; - - ExtEntryTable[NumExtEntryPoints].name = str_dup(funcName); - ExtEntryTable[NumExtEntryPoints].parameter_signature = NULL; - ExtEntryTable[NumExtEntryPoints].dispatch_offset = ~0; - ExtEntryTable[NumExtEntryPoints].dispatch_stub = entrypoint; - NumExtEntryPoints++; - } - } - - 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]. - * - * \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; - unsigned j; - int offset = ~0; - int new_offset; - - - (void) memset( is_static, 0, sizeof( is_static ) ); - (void) memset( entry, 0, sizeof( entry ) ); - - for ( i = 0 ; function_names[i] != NULL ; i++ ) { - /* Do some trivial validation on the name of the function. - */ - -#ifdef MANGLE - if (!function_names[i] || function_names[i][0] != 'm' || function_names[i][1] != 'g' || function_names[i][2] != 'l') - return GL_FALSE; -#else - if (!function_names[i] || function_names[i][0] != 'g' || function_names[i][1] != 'l') - return GL_FALSE; -#endif - - - /* Determine if the named function already exists. If the function does - * exist, it must have the same parameter signature as the function - * being added. - */ - - new_offset = get_static_proc_offset(function_names[i]); - if (new_offset >= 0) { - /* FIXME: Make sure the parameter signatures match! How do we get - * FIXME: the parameter signature for static functions? - */ - - if ( (offset != ~0) && (new_offset != offset) ) { - return -1; - } - - is_static[i] = GL_TRUE; - offset = new_offset; - } - - - for ( j = 0 ; j < NumExtEntryPoints ; j++ ) { - if (strcmp(ExtEntryTable[j].name, function_names[i]) == 0) { - /* The offset may be ~0 if the function name was added by - * glXGetProcAddress but never filled in by the driver. - */ - - if (ExtEntryTable[j].dispatch_offset != ~0) { - if (strcmp(real_sig, ExtEntryTable[j].parameter_signature) - != 0) { - return -1; - } - - if ( (offset != ~0) && (ExtEntryTable[j].dispatch_offset != offset) ) { - return -1; - } - - offset = ExtEntryTable[j].dispatch_offset; - } - - entry[i] = & ExtEntryTable[j]; - break; - } - } - } - - - if (offset == ~0) { - offset = next_dynamic_offset; - next_dynamic_offset++; - } - - - for ( i = 0 ; function_names[i] != NULL ; i++ ) { - if (! is_static[i] ) { - if (entry[i] == NULL) { - entry[i] = add_function_name( function_names[i] ); - if (entry[i] == NULL) { - /* FIXME: Possible memory leak here. - */ - return -1; - } - } - - - entry[i]->parameter_signature = str_dup(real_sig); - fill_in_entrypoint_offset(entry[i]->dispatch_stub, offset); - entry[i]->dispatch_offset = offset; - } - } - - return offset; -} - - -/** - * Return offset of entrypoint for named function within dispatch table. - */ -PUBLIC GLint -_glapi_get_proc_offset(const char *funcName) -{ - /* search extension functions first */ - GLuint i; - for (i = 0; i < NumExtEntryPoints; i++) { - if (strcmp(ExtEntryTable[i].name, funcName) == 0) { - return ExtEntryTable[i].dispatch_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. - */ -_glapi_proc -_glapi_get_proc_address(const char *funcName) -{ - struct _glapi_function * entry; - GLuint i; - -#ifdef MANGLE - if (funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l') - return NULL; -#else - if (funcName[0] != 'g' || funcName[1] != 'l') - return NULL; -#endif - - /* search extension functions first */ - for (i = 0; i < NumExtEntryPoints; i++) { - if (strcmp(ExtEntryTable[i].name, funcName) == 0) { - return ExtEntryTable[i].dispatch_stub; - } - } - -#if !defined( XFree86Server ) - /* search static functions */ - { - const _glapi_proc func = get_static_proc_address(funcName); - if (func) - return func; - } -#endif /* !defined( XFree86Server ) */ - - entry = add_function_name(funcName); - return (entry == NULL) ? NULL : 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) -{ - GLuint i; - const char * n; - - /* search built-in functions */ - n = get_static_proc_name(offset); - if ( n != NULL ) { - return n; - } - - /* search added extension functions */ - for (i = 0; i < NumExtEntryPoints; i++) { - if (ExtEntryTable[i].dispatch_offset == offset) { - return ExtEntryTable[i].name; - } - } - return NULL; -} - - - -/** - * 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(const struct _glapi_table *table) -{ -#ifdef 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]); - } - - /* Do some spot checks to be sure that the dispatch table - * slots are assigned correctly. - */ - { - 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 istextureOffset = _glapi_get_proc_offset("glIsTextureEXT"); - char *istextureFunc = (char*) &table->IsTextureEXT; - GLuint offset = (istextureFunc - (char *) table) / sizeof(void *); - assert(istextureOffset == _gloffset_IsTextureEXT); - assert(istextureOffset == 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); - assert(_glapi_get_proc_address("glSecondaryColor3fEXT") == (_glapi_proc) &glSecondaryColor3fEXT); - } - { - 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); - assert(_glapi_get_proc_address("glPointParameterivNV") == (_glapi_proc) &glPointParameterivNV); - } - { - 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); - assert(_glapi_get_proc_address("glSetFenceNV") == (_glapi_proc) &glSetFenceNV); - } -#else - (void) table; -#endif -} - - -/** - * Perform platform-specific GL API entry-point fixups. - * - * - */ -static void -init_glapi_relocs( void ) -{ -#if defined( USE_X86_ASM ) && defined( GLX_USE_TLS ) - extern void * _x86_get_dispatch(void); - const GLubyte * const get_disp = (const GLubyte *) _x86_get_dispatch; - GLubyte * curr_func = (GLubyte *) gl_dispatch_functions_start; - - - while ( curr_func != (GLubyte *) gl_dispatch_functions_end ) { - (void) memcpy( curr_func, get_disp, 6 ); - curr_func += X86_DISPATCH_FUNCTION_SIZE; - } -#endif /* defined( USE_X86_ASM ) && defined( GLX_USE_TLS ) */ -} |