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/*
Ghostscript initialization for fpTeX.
Copyright (C) 1998, 99 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
This function returns the directory name where GS is installed
and tries to make sure that either gswin32c.exe or gsdll32.dll
will run as expected, by checking GS_LIB.
Location of .exe or .dll :
- look into the PATH for the dll, if found this will be the directory
- look into the registry, warn user if a different version is found
- check for GS_LIB in the environment
- check for GS_LIB in the registry
- else build a GS_LIB from rule of thumb.
*/
#include <string.h>
#include <win32lib.h>
#include <gs32lib.h>
#include "gvwgsver.h"
extern char *xstrdup(const char *);
#define GSDLL "gsdll32.dll"
/* GSW32DLL char *gs_dir = NULL; */
GSW32DLL char *gs_dll = NULL;
GSW32DLL char *gs_lib = NULL;
GSW32DLL char *gs_revision = NULL;
/* GSW32DLL char *gs_product_values[] = { "AFPL Ghostscript", "Aladdin Ghostscript", "GNU Ghostscript" }; */
/* GSW32DLL char *gs_product = NULL; */
/* int gs_product_index; */
#define NB_ITEMS(x) (sizeof(x)/sizeof(x[0]))
/*
* Load the ghostscript dll gswin32.dll.
* See the dll.txt file in the ghostscript source distribution.
* We will try to make gs draw directly onto the screen/printer
* device, as it is using SetDIBitsToDevice(), and it may use
* more colors than the mem device has.
* This may not be the more efficient, and we will have to see
* how it adapts to printing. But there may be some overhead
* at getting the whole dib at scale 1.
*/
GSW32DLL PFN_gsdll_init pgsdll_init;
GSW32DLL PFN_gsdll_execute_begin pgsdll_execute_begin;
GSW32DLL PFN_gsdll_execute_cont pgsdll_execute_cont;
GSW32DLL PFN_gsdll_execute_end pgsdll_execute_end;
GSW32DLL PFN_gsdll_exit pgsdll_exit;
GSW32DLL PFN_gsdll_draw pgsdll_draw;
GSW32DLL PFN_gsdll_get_bitmap_row pgsdll_get_bitmap_row;
GSW32DLL PFN_gsdll_lock_device pgsdll_lock_device;
GSW32DLL HANDLE hGsDll = 0;
const char *gslocpath[] = { "fonts", "..\\fonts", "..\\..\\fonts",
"lib", "..\\lib" };
int
gs_version_cmp(const char *sv1, const char *sv2)
{
/*
Assuming version numbers of the form : xx.yy
*/
int nv1x, nv1y, nv2x, nv2y;
if (sscanf(sv1, "%d.%d", &nv1x, &nv1y) == 2
&& sscanf(sv2, "%d.%d", &nv2x, &nv2y) == 2) {
if (nv1x == nv2x) {
return nv1y - nv2y;
}
else {
return nv1x - nv2x;
}
}
else {
return -1;
}
}
// Set the latest Ghostscript EXE or DLL from the registry
BOOL
gs_registry_locate()
{
int count;
int *ver;
int gsver;
char buf[256];
char *p;
int i;
DWORD version = GetVersion();
if ( ((HIWORD(version) & 0x8000)!=0) && ((HIWORD(version) & 0x4000)==0) )
return FALSE; // win32s
count = 1;
get_gs_versions(&count);
if (count < 1)
return FALSE;
ver = (int *)malloc((count+1)*sizeof(int));
if (ver == (int *)NULL)
return FALSE;
ver[0] = count+1;
if (!get_gs_versions(ver)) {
free(ver);
return FALSE;
}
gsver = 0;
for (i=1; i<=ver[0]; i++) {
if (ver[i] > gsver)
gsver = ver[i];
}
free(ver);
gs_revision = xmalloc(sizeof("99.99"));
gs_revision[0] = (int)(gsver / 100) + 48;
gs_revision[1] = '.';
gs_revision[2] = (int)((gsver / 10) % 10) + 48;
gs_revision[3] = (int)(gsver % 10) + 48;
gs_revision[4] = '\0';
if (!get_gs_string(gsver, "GS_DLL", buf, sizeof(buf)))
return FALSE;
// just to make sure
for(p = buf; p && *p; p++)
*p = (*p == '/' ? '\\' : *p);
gs_dll = xstrdup(buf);
if (!get_gs_string(gsver, "GS_LIB", buf, sizeof(buf)))
return FALSE;
gs_lib = xstrdup(buf);
return TRUE;
}
char * gs_locate()
{
char data[MAXPATHLEN];
DWORD data_len;
char *fp;
/* FIXME : Should also try to open and read
gsview32.ini !
FIXME : What policy should we use ?
What if gs_dll is found in the registry and
in the PATH ?
Currently, it the PATH points to some gs version, then this
is the one that will be used. But in this case, GS_LIB must
be set too, else the registry will be looked for.
*/
if (gs_registry_locate() == FALSE) {
gs_revision = xstrdup("(unknown)");
if (SearchPath(NULL, GSDLL, NULL, sizeof(data), data, &fp) != 0) {
gs_dll = xstrdup(data);
}
if (gs_lib = getenv("GS_LIB"))
gs_lib = xstrdup(gs_lib);
}
return gs_dll;
}
BOOL gs_dll_initialize()
{
if (!gs_dll || !*gs_dll) {
fprintf(stderr, "gs not initialized, dll not found.\n");
return FALSE;
}
if ((hGsDll = LoadLibrary(gs_dll)) == NULL) {
fprintf(stderr, "LoadLibrary: Can't load gs dll.");
hGsDll = 0;
return FALSE;
}
pgsdll_init = (PFN_gsdll_init)GetProcAddress(hGsDll, "gsdll_init");
pgsdll_execute_begin = (PFN_gsdll_execute_begin)GetProcAddress(hGsDll, "gsdll_execute_begin");
pgsdll_execute_cont = (PFN_gsdll_execute_cont)GetProcAddress(hGsDll, "gsdll_execute_cont");
pgsdll_execute_end = (PFN_gsdll_execute_end)GetProcAddress(hGsDll, "gsdll_execute_end");
pgsdll_exit = (PFN_gsdll_exit)GetProcAddress(hGsDll, "gsdll_exit");
pgsdll_draw = (PFN_gsdll_draw)GetProcAddress(hGsDll, "gsdll_draw");
pgsdll_get_bitmap_row = (PFN_gsdll_get_bitmap_row)GetProcAddress(hGsDll, "gsdll_get_bitmap_row");
pgsdll_lock_device = (PFN_gsdll_lock_device)GetProcAddress(hGsDll, "gsdll_lock_device");
if (!pgsdll_init || !pgsdll_execute_begin || !pgsdll_execute_cont
|| !pgsdll_execute_end || !pgsdll_exit || !pgsdll_draw
|| !pgsdll_get_bitmap_row || !pgsdll_lock_device) {
fprintf(stderr, "Not all functions found in gs dll.\n");
return FALSE;
}
return TRUE;
}
BOOL gs_dll_release()
{
if (hGsDll) {
FreeLibrary(hGsDll);
hGsDll = 0;
return TRUE;
}
return FALSE;
}
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