/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 6.5.2
*
- * 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"),
#include "texformat.h"
#include "texstore.h"
-#if USE_EXTERNAL_DXTN_LIB
+#if USE_EXTERNAL_DXTN_LIB && !defined(__MINGW32__)
+#include <dlfcn.h>
+#endif
+
#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)
+#define DXTN_LIBNAME "dxtn.dll"
+#define RTLD_LAZY 0
+#define RTLD_GLOBAL 0
#elif defined(__DJGPP__)
-/* has dlopen, but doesn't like the names */
-#include <dlfcn.h>
-#define DXTN_EXT "dxtn.dxe"
-#define DXTN_PREFIX "_"
+#define DXTN_LIBNAME "dxtn.dxe"
#else
-/* happiness */
-#include <dlfcn.h>
-#define DXTN_EXT "libtxc_dxtn.so"
-#define DXTN_PREFIX ""
+#define DXTN_LIBNAME "libtxc_dxtn.so"
#endif
-#endif /* USE_EXTERNAL_DXTN_LIB */
+
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;
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 )
{
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");
- }
-
- if (ext_tx_compress_dxtn == NULL) {
+ 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 (!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;
}
}
projects / mesa.git / blobdiff