[英]How to send a bitmap and text data thought processes using file mapping?
我嘗試使用file mapping
將bitmap
和一些text
字符串從腳本發送到另一個腳本,以下是我的嘗試:
FM := new FileMapping()
Return
F1:: FM.Read()
Esc::ExitApp
F2:: ; Write the pbitmap to map
; GDIp startup
VarSetCapacity(si, 8 + A_PtrSize*2, 0), si := Chr(1)
DllCall("gdiplus\GdiplusStartup", "UPtrP", pToken, "Ptr", &si, "Ptr", 0)
; ------------------------------------------------------------------------
; Create the pBitmap #1
File := "test.png"
DllCall("gdiplus\GdipCreateBitmapFromFile", "WStr", File, "PtrP", pBitmap)
; ------------------------------------------------------------------------
; LockBits #2
DllCall("gdiplus\GdipGetImageDimension", Ptr, pBitmap, "float*", width, "float*", height)
DllCall("gdiplus\GdipGetImagePixelFormat", "Ptr", pBitmap, "PtrP", pixelFormat)
VarSetCapacity(Rect, 16)
NumPut(0, Rect, 0, "UInt")
NumPut(0, Rect, 4, "UInt")
NumPut(width, Rect, 8, "UInt")
NumPut(height, Rect, 12, "UInt")
VarSetCapacity(BitmapData, 16+2*(A_PtrSize ? A_PtrSize : 4), 0)
E := DllCall("Gdiplus\GdipBitmapLockBits", "Ptr", pBitmap, "Ptr", &Rect, "UInt", LockMode:=3, "Int", PixelFormat, "Ptr", &BitmapData)
Stride := NumGet(BitmapData, 8, "Int")
Scan0 := NumGet(BitmapData, 16)
size := stride * height
; ------------------------------------------------------------------------
; Append a string into the data
; that will be saved on memory #3
str := "test test"
VarSetCapacity(data, dataSize := size + 16 + StrLen(str)*2 + 2, 0)
StrPut(str, &data + size + 16)
; Copty the data to memory #4
DllCall("RtlCopyMemory", "Ptr", &data + 16, "Ptr", scan0, "Ptr", size)
DllCall("Gdiplus\GdipBitmapUnlockBits", "UPtr", pBitmap, "UPtr", &BitmapData)
; ------------------------------------------------------------------------
; Write to map #5
NumPut(pixelFormat, data)
NumPut(width , data, 4)
NumPut(height , data, 8)
NumPut(stride , data, 12, "UInt")
VarSetCapacity(COPYDATASTRUCT, A_PtrSize*3, 0)
NumPut(dataSize, COPYDATASTRUCT, A_PtrSize)
NumPut(&data, COPYDATASTRUCT, A_PtrSize*2)
FM.Write(©DATASTRUCT)
; ------------------------------------------------------------------------
Return
Class FileMapping {
__New(Name="Global\MyFileMappingObject", BufSize=100000) {
; Opens existing or creates new file mapping object
static INVALID_HANDLE_VALUE := -1, PAGE_READWRITE := 0x4, FILE_MAP_ALL_ACCESS := 0xF001F
hMapFile := DllCall("OpenFileMapping", "Ptr", FILE_MAP_ALL_ACCESS, "Int", 0, "Str", Name)
if ( hMapFile == 0 ) {
; OpenFileMapping Failed - file mapping object doesn't exist - that means we have to create it
hMapFile := DllCall("CreateFileMapping", "Ptr", INVALID_HANDLE_VALUE, "Ptr", 0, "Int", PAGE_READWRITE, "Int", 0, "Int", BufSize, "Str", Name)
if ( hMapFile == 0 ) ; CreateFileMapping Failed
return
}
pBuf := DllCall("MapViewOfFile", "Ptr", hMapFile, "Int", FILE_MAP_ALL_ACCESS, "Int", 0, "Int", 0, "Ptr", BufSize)
if ( pBuf == 0 ) ; MapViewOfFile Failed
return
this.Name := Name
this.hMapFile := hMapFile
this.pBuf := pBuf
this.BufSize := BufSize
}
Write(data:="") {
NumPut(data, this.pBuf)
}
Read() {
static flags := HEAP_ZERO_MEMORY := 0x00000008
, hHeap := DllCall("GetProcessHeap", "Ptr")
param := NumGet(this.pBuf)
size := NumGet(param + A_PtrSize, "UInt")
pData := NumGet(param + A_PtrSize*2)
pHeap := DllCall("HeapAlloc", "Ptr", hHeap, "UInt", flags, "UPtr", size, "Ptr")
DllCall("RtlCopyMemory", "Ptr", pHeap, "Ptr", pData, "Ptr", size)
this.CreateBitmapFromData(hHeap, pHeap)
return
}
CreateBitmapFromData(hHeap, pImageData) {
pixelFormat := NumGet(pImageData+0, "UInt")
width := NumGet(pImageData+4, "UInt")
height := NumGet(pImageData+8, "UInt")
stride := NumGet(pImageData+12,"UInt")
; The string appended in the step #3 ("test test")
str := StrGet(pImageData + 16 + stride*height)
DllCall("gdiplus\GdipCreateBitmapFromScan0", "Int", width, "Int", height, "Int", stride, "Int", pixelFormat, "Ptr", pImageData + 16, "PtrP", pBitmap)
DllCall("gdiplus\GdipCreateHBITMAPFromBitmap", "Ptr", pBitmap, "PtrP", hbm, "Int", 0xffffffff)
; Just for test, create a gui showing the picture.
Gui, Add, Picture, x0 y0, % "HBITMAP:" hbm
Gui, Show
DllCall("HeapFree", "Ptr", hHeap, "UInt", 0, "Ptr", pImageData)
DllCall("gdiplus\GdipDisposeImage", "Ptr", pBitmap)
}
__Delete() {
DllCall("UnmapViewOfFile", "Ptr", this.pBuf), DllCall("CloseHandle", "Ptr", this.hMapFile)
}
}
要將位圖和文本寫入文件映射,請F2
它將從給定文件創建一個位圖(#1)
在位圖上調用 lockbits(#2),將掃描和字符串 (#3) 保存到data
中並利用RtlCopyMemory
將data
復制到內存 (#4)
然后,將data
保存到文件映射中(#5)
當您按F1
時,它將從Class FileMap
調用函數Read()
並“重建”已保存在文件映射內的位圖 ( CreateBitmapFromData
),並讀取步驟 #3 中附加的字符串
只要從同一個腳本讀取/寫入,事情就可以正常工作,如果我啟動不同的進程並調用FM.Read()
它不起作用,則函數Read()
內的size
和pData
的值是空白的:
param := NumGet(this.pBuf)
size := NumGet(param + A_PtrSize, "UInt")
pData := NumGet(param + A_PtrSize*2)
感謝您對此的任何幫助!
您必須添加更多錯誤處理。 檢查所有返回值並調用
DllCall("GetLastError")
在不返回錯誤代碼的函數之后。 這將說明正在發生的事情。 沒有這個,就很難給出一個完整的答案,因為有很多事情可能會出錯。
使用 VS Code 的 AutoHotkey 調試器擴展之一,如下所示: AutoHotkey Plus
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