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| ;/////////////////////////////////////////////////////////////////////////////////
;GhostScriptHelper.
;
;©nsxSoftware 2011.
;==============
; Stephen Rodriguez (srod)
; Created with Purebasic 4.6 for Windows.
;
; Platforms: Windows.
; Fully Unicode compliant.
;
;Thanks to progi1984 for his GhostScript library from which I stole the ps2pdf routine and converted to Unicode etc.
;/////////////////////////////////////////////////////////////////////////////////
;/////////////////////////////////////////////////////////////////////////////////
;The following function attempts to locate the GhostScript library on the user's computer. This assumes that the GhostScript installer was used.
;If successful, returns the full path (including the library name) of the latest version of the library found on the machine,
;otherwise an empty string is returned.
;Failure does not necessarily mean that the library is not present - just that we cannot locate it.
Procedure.s GhostScriptHelper_GetGhostScriptInstallation()
Protected result$, hKey1, numSubkeys, maxSubKeyLen, nameBuffer, i, t1, t1$, key$, latestKey, latestKey$
Protected bufferSize, type
;Attempt to open the relevant registry parent key.
If RegOpenKeyEx_(#HKEY_LOCAL_MACHINE, "Software\GPL Ghostscript", 0, #KEY_READ, @hKey1) = #ERROR_SUCCESS And hKey1
If RegQueryInfoKey_(hKey1, 0, 0, 0, @numSubkeys, @maxSubKeyLen, 0, 0, 0, 0, 0, 0) = #ERROR_SUCCESS
If numSubkeys And maxSubKeyLen
nameBuffer = AllocateMemory((maxSubKeyLen+1)<<(SizeOf(CHARACTER)-1))
If nameBuffer
For i = 0 To numSubkeys - 1
t1 = maxSubKeyLen+1
RegEnumKeyEx_(hKey1, i, nameBuffer, @t1, 0, 0, 0, 0)
key$ = PeekS(nameBuffer)
If key$
t1$ = RemoveString(key$, ".")
t1 = Val(key$)
If t1 > latestKey
latestKey = t1
latestKey$ = key$
EndIf
EndIf
Next
FreeMemory(nameBuffer)
If latestKey$
latestKey$ = "Software\GPL Ghostscript\" + latestKey$
EndIf
EndIf
EndIf
EndIf
RegCloseKey_(hKey1)
;latestKey$ contains the subkey name of the relevant registry entry. We just have to read it's value.
If latestKey$
If RegOpenKeyEx_(#HKEY_LOCAL_MACHINE, latestKey$, 0, #KEY_READ, @hKey1) = #ERROR_SUCCESS And hKey1
RegQueryValueEx_(hKey1, "GS_DLL", 0, @type, 0, @bufferSize)
If type = #REG_SZ And bufferSize
nameBuffer = AllocateMemory(buffersize)
If nameBuffer
If RegQueryValueEx_(hKey1, "GS_DLL", 0, 0, nameBuffer, @bufferSize) = #ERROR_SUCCESS
result$ = PeekS(nameBuffer)
EndIf
FreeMemory(nameBuffer)
EndIf
EndIf
RegCloseKey_(hKey1)
EndIf
EndIf
EndIf
ProcedureReturn result$
EndProcedure
;/////////////////////////////////////////////////////////////////////////////////
;/////////////////////////////////////////////////////////////////////////////////
;The following uses GhostScript to convert a ps file to pdf.
;ghostScript$ should contain the complete path to the GhostScript dll. Either use a local copy of the dll stored in the application
;folder or, if prefering to use the GhostScript installation itself, try locating the GhostScript installation folder using the
;above GhostScriptHelper_GetGhostScriptInstallation() function.
;Returns zero if an error.
Procedure.i GhostScriptHelper_ps2pdf(ghostScript$, inputFile$, outputFile$="")
Protected result, libID, t1$, gsargc = 10, code, instance, utf8Buffer, *ptr
Protected Dim gsargv.i(gsargc)
If ghostScript$ And inputFile$ And FileSize(inputFile$) > 0
If outputFile$ = ""
t1$ = GetExtensionPart(inputFile$)
If t1$
outputFile$ = ReplaceString(inputFile$, t1$, "pdf")
Else
outputFile$ = inputFile$ + ".pdf"
EndIf
EndIf
;Create a UTF-8 array of command strings.
utf8Buffer = AllocateMemory(2048)
If utf8Buffer
*ptr = utf8Buffer
gsargv(0) = ?GhostScript_ps2pdf_ps2pdf
gsargv(1) = ?GhostScript_ps2pdf_dNOPAUSE
gsargv(2) = ?GhostScript_ps2pdf_dBATCH
gsargv(3) = ?GhostScript_ps2pdf_dSAFER
gsargv(4) = ?GhostScript_ps2pdf_sDEVICEpdfwrite
gsargv(6) = ?GhostScript_ps2pdf_C
gsargv(7) = ?GhostScript_ps2pdf_setpdfwrite
gsargv(8) = ?GhostScript_ps2pdf_F
PokeS(*ptr, "-sOutputFile="+outputFile$, -1, #PB_UTF8)
gsargv(5) = *ptr : *ptr + StringByteLength("-sOutputFile="+outputFile$, #PB_UTF8) + 1
PokeS(*ptr, inputFile$, -1, #PB_UTF8)
gsargv(9) = *ptr
libID = OpenLibrary(#PB_Any, ghostScript$)
If libID
code = CallFunction(libID, "gsapi_new_instance", @instance, #Null)
If code >= 0
code = CallFunction(libID, "gsapi_init_with_args", instance, gsargc, @gsargv())
If code >=0
result = #True
EndIf
CallFunction(libID, "gsapi_exit", instance)
CallFunction(libID, "gsapi_delete_instance", instance)
EndIf
CloseLibrary(libID)
EndIf
FreeMemory(utf8Buffer)
EndIf
EndIf
ProcedureReturn result
EndProcedure
;/////////////////////////////////////////////////////////////////////////////////
;/////////////////////////////////////////////////////////////////////////////////
;DATA SECTION (UTF8 STRINGS).
DataSection
GhostScript_ps2pdf_ps2pdf: ;'ps2pdf'
Data.a 112, 115, 50, 112, 100, 102, 0
GhostScript_ps2pdf_dNOPAUSE: ;'-dNOPAUSE'
Data.a 45, 100, 78, 79, 80, 65, 85, 83, 69, 0
GhostScript_ps2pdf_dBATCH: ;'-dBATCH'
Data.a 45, 100, 66, 65, 84, 67, 72, 0
GhostScript_ps2pdf_dSAFER: ;'-dSAFER'
Data.a 45, 100, 83, 65, 70, 69, 82, 0
GhostScript_ps2pdf_sDEVICEpdfwrite: ;'-sDEVICE=pdfwrite'
Data.a 45, 115, 68, 69, 86, 73, 67, 69, 61, 112, 100, 102, 119, 114, 105, 116, 101, 0
GhostScript_ps2pdf_C: ;'-c'
Data.a 45, 99, 0
GhostScript_ps2pdf_setpdfwrite: ;'.setpdfwrite'
Data.a 46, 115, 101, 116, 112, 100, 102, 119, 114, 105, 116, 101, 0
GhostScript_ps2pdf_F: ;'-f'
Data.a 45, 102, 0
EndDataSection
;///////////////////////////////////////////////////////////////////////////////// |
