OpenEuphoria

1. Another GDI+ problem

• Posted by buzzo Jan 10, 2012
• 1306 views

In the following code, ExportImage() returns status=10 .. it write an empty (0kb) file.. sure would like to have it return 0.. Are "other steps" needed to convert this jpg to a bmp? The DoGraphics() procedure performs just fine..

--testGDI-02.exw 
-- 1-10-2012 
 
include machine.e 
include misc.e 
include Win32Lib.ew 
include dll.e 
include wildcard.e 
include gdiplus_Win98,XP.ew 
 
without warning 
 
sequence screenSize screenSize =  getCtlSize( Screen )			-- get screen size 
global integer screenWidth screenWidth = screenSize[1]			-- width 
global integer screenHeight screenHeight = screenSize[2]		-- height 
integer winWidth winWidth = 1280								-- MAIN WINDOW WIDTH 
integer winHeight winHeight = 900								-- MAIN WINDOW HEIGHT 
integer xWinPos xWinPos = floor((screenWidth - winWidth)/2)		-- x postion on display for centering MAIN WINDOW 
integer yWinPos yWinPos = floor((screenHeight - winHeight)/2)	-- y postion on display 
 
constant win  = createEx( Window, "Relatives", 0, xWinPos, yWinPos, winWidth, winHeight, 0, 0 ), 
     	 CrLf = { '\r', '\n' } 
 
--************ GdiPlus Specific Code *************** 
global atom status,ppGraphics,ppImage,pGraphics,pImage 
sequence LoadFilePath,SaveFilePath	--,FilePath 
status=GdipInitialize() if status!=0 then puts(1,"Cant open a required dll\n") sleep(1) end if 
pImage=0 ppGraphics=allocate(4) ppImage=allocate(4) 
LoadFilePath="H:\\Euphoria\\relatives\\Genealogy\\JPark.jpg" 
SaveFilePath="H:\\Euphoria\\relatives\\Genealogy\\JPark-01.bmp" 
 
procedure ExportImage (sequence filePath) 
-- load an image and it save as a .bmp file 
	atom p_encoderParams,p_filenameW,p_clsidEncoderW,lpFilePathW 
 
	status=GdipCreateFromHWND(getHandle(win),ppGraphics) if status=0 then pGraphics=peek4u(ppGraphics) else pGraphics=0 end if 
	if length(filePath)>0 then status=GdipDisposeImage(pImage) lpFilePathW=AnsiToUnicode(filePath) status=GdipLoadImageFromFile(lpFilePathW,ppImage) 
    	if status=0 then pImage=peek4u(ppImage) else pImage=0 end if 
  	end if 
	p_encoderParams=NULL 
	p_filenameW=AnsiToUnicode(SaveFilePath) 
	p_clsidEncoderW=AnsiToUnicode("image/bmp") 
--         GdipSaveImageToFile(atom p_image,atom p_filename,atom p_clsidEncoder,atom p_encoderParams) 
	status=GdipSaveImageToFile(pImage,p_filenameW,p_clsidEncoderW,p_encoderParams) 
puts(1,w32ToString(status)) puts(1,CrLf) 
free(ppGraphics) free(ppImage) FreeUnicode(lpFilePathW) FreeUnicode(p_filenameW) FreeUnicode(p_clsidEncoderW) 
end procedure 
 
procedure DoGraphics(sequence filePath) 
	atom Width,Height,pUINT,pW,pH,lpFilePathW 
	status=GdipCreateFromHWND(getHandle(win),ppGraphics) if status=0 then pGraphics=peek4u(ppGraphics) else pGraphics=0 end if 
	if length(filePath)>0 then status=GdipDisposeImage(pImage) lpFilePathW=AnsiToUnicode(filePath) status=GdipLoadImageFromFile(lpFilePathW,ppImage) 
    	if status=0 then pImage=peek4u(ppImage) else pImage=0 end if 
  	end if 
  	pUINT=allocate(4) status=GdipGetImageWidth(pImage,pUINT) Width=peek4u(pUINT) status=GdipGetImageHeight(pImage,pUINT) Height=peek4u(pUINT) 
	pW=100 pH=floor(Height*(pW/Width)) status=GdipDrawImageRectI(pGraphics,pImage,40,20,pW,pH) 
    FreeUnicode(lpFilePathW) free(pUINT) free(ppGraphics) free(ppImage) 
end procedure 
 
procedure win_onPaint(integer Self, integer Event, sequence Params) 
	atom editR=100 
	if editR=100 then DoGraphics(LoadFilePath) end if 
end procedure  
setHandler(win, w32HPaint, routine_id("win_onPaint"))  
 
ExportImage(LoadFilePath) 
---------------- 
WinMain(win,Normal)