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New wrapper functions: _mesa_dlopen(), _mesa_dlsym(), _mesa_dlclose(). 

Eventually move them into imports.c
This commit is contained in:
Brian Paul 2006-08-03 03:59:20 +00:00
parent 6c071592ab
commit 9c3876d7d8
1 changed files with 99 additions and 38 deletions
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137
src/mesa/main/texcompress_s3tc.c
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@ -1,8 +1,8 @@
/*
* Mesa 3-D graphics library
* Version: 6.5
* Version: 6.5.1
*
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2006 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"),
@ -42,28 +42,21 @@
#include "texformat.h"
#include "texstore.h"
#if USE_EXTERNAL_DXTN_LIB
#ifdef __MINGW32__
/* no dlopen */
#define DXTN_EXT "dxtn.dll"
#define DXTN_PREFIX ""
#define dlopen(name, mode) LoadLibrary(name)
#define dlsym(hndl, proc) GetProcAddress(hndl, proc)
#define dlclose(hndl) FreeLibrary(hndl)
#elif defined(__DJGPP__)
/* has dlopen, but doesn't like the names */
#if USE_EXTERNAL_DXTN_LIB && !defined(__MINGW32__)
#include <dlfcn.h>
#define DXTN_EXT "dxtn.dxe"
#define DXTN_PREFIX "_"
#else
/* happiness */
#include <dlfcn.h>
#define DXTN_EXT "libtxc_dxtn.so"
#define DXTN_PREFIX ""
#endif
#endif /* USE_EXTERNAL_DXTN_LIB */
#ifdef __MINGW32__
#define DXTN_LIBNAME "dxtn.dll"
#elif defined(__DJGPP__)
#define DXTN_LIBNAME "dxtn.dxe"
#else
#define DXTN_LIBNAME "libtxc_dxtn.so"
#endif
typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut );
dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL;
dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL;
dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL;
@ -73,11 +66,78 @@ typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width,
GLint height, const GLchan *srcPixData,
GLenum destformat, GLubyte *dest,
GLint dstRowStride);
static dxtCompressTexFuncExt ext_tx_compress_dxtn = NULL;
static void *dxtlibhandle = NULL;
typedef void (*GenericFunc)(void);
/**
* Wrapper for dlopen().
* XXX Probably move this and the following wrappers into imports.h someday.
*/
static void *
_mesa_dlopen(const char *libname, int flags)
{
#if USE_EXTERNAL_DXTN_LIB
#ifdef __MINGW32__
return LoadLibrary(libname);
#else
return dlopen(libname, flags);
#endif
#else
return (GenericFunc) NULL;
#endif /* USE_EXTERNAL_DXTN_LIB */
}
/**
* Wrapper for dlsym() that does a cast to a generic function type,
* rather than a void *. This reduces the number of warnings that are
* generated.
*/
static GenericFunc
_mesa_dlsym(void *handle, const char *fname)
{
#if USE_EXTERNAL_DXTN_LIB
#ifdef __MINGW32__
return (GenericFunc) GetProcAddress(handle, fname)
#elif defined(__DJGPP__)
/* need '_' prefix on symbol names */
char fname2[1000];
fname2[0] = '_';
_mesa_strncpy(fname2 + 1, fname, 998);
fname2[999] = 0;
return (GenericFunc) dlsym(handle, fname2);
#else
return (GenericFunc) dlsym(handle, fname);
#endif
#else
return (GenericFunc) NULL;
#endif /* USE_EXTERNAL_DXTN_LIB */
}
/**
* Wrapper for dlclose().
*/
static void
_mesa_dlclose(void *handle)
{
#if USE_EXTERNAL_DXTN_LIB
#ifdef __MINGW32__
FreeLibrary(handle);
#else
dlclose(handle);
#endif
#endif
}
void
_mesa_init_texture_s3tc( GLcontext *ctx )
{
@ -85,37 +145,38 @@ _mesa_init_texture_s3tc( GLcontext *ctx )
ctx->Mesa_DXTn = GL_FALSE;
#if USE_EXTERNAL_DXTN_LIB
if (!dxtlibhandle) {
dxtlibhandle = dlopen (DXTN_EXT, RTLD_LAZY | RTLD_GLOBAL);
dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, RTLD_LAZY | RTLD_GLOBAL);
if (!dxtlibhandle) {
_mesa_warning(ctx, "couldn't open " DXTN_EXT ", software DXTn "
_mesa_warning(ctx, "couldn't open " DXTN_LIBNAME ", software DXTn "
"compression/decompression unavailable");
}
else {
/* the fetch functions are not per context! Might be problematic... */
fetch_ext_rgb_dxt1 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgb_dxt1");
if (fetch_ext_rgb_dxt1 != NULL) {
fetch_ext_rgba_dxt1 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt1");
}
if (fetch_ext_rgba_dxt1 != NULL) {
fetch_ext_rgba_dxt3 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt3");
}
if (fetch_ext_rgba_dxt3 != NULL) {
fetch_ext_rgba_dxt5 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt5");
}
if (fetch_ext_rgba_dxt5 != NULL) {
ext_tx_compress_dxtn = (dxtCompressTexFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "tx_compress_dxtn");
}
fetch_ext_rgb_dxt1 = (dxtFetchTexelFuncExt)
_mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgb_dxt1");
fetch_ext_rgba_dxt1 = (dxtFetchTexelFuncExt)
_mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt1");
fetch_ext_rgba_dxt3 = (dxtFetchTexelFuncExt)
_mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt3");
fetch_ext_rgba_dxt5 = (dxtFetchTexelFuncExt)
_mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt5");
ext_tx_compress_dxtn = (dxtCompressTexFuncExt)
_mesa_dlsym(dxtlibhandle, "tx_compress_dxtn");
if (ext_tx_compress_dxtn == NULL) {
if (!fetch_ext_rgb_dxt1 ||
!fetch_ext_rgba_dxt1 ||
!fetch_ext_rgba_dxt3 ||
!fetch_ext_rgba_dxt5 ||
!ext_tx_compress_dxtn) {
_mesa_warning(ctx, "couldn't reference all symbols in "
DXTN_EXT ", software DXTn compression/decompression "
DXTN_LIBNAME ", software DXTn compression/decompression "
"unavailable");
fetch_ext_rgb_dxt1 = NULL;
fetch_ext_rgba_dxt1 = NULL;
fetch_ext_rgba_dxt3 = NULL;
fetch_ext_rgba_dxt5 = NULL;
ext_tx_compress_dxtn = NULL;
dlclose(dxtlibhandle);
_mesa_dlclose(dxtlibhandle);
dxtlibhandle = NULL;
}
}