OpenEuphoria

Re: Load and Display a JPG Image

• Posted by m_sabal May 10, 2013
• 1604 views

Using Win32Lib

include win32lib.ew 
include gdiplus.ew -- Library by Al Getz. 
 
object imageBox 
atom pImage 
imageBox = createEx(Group,"Style Image",CSEntryTab,405,currentVOffset+5,390,370,0,0) 
pImage = -1 

procedure clearImage()  
	object junk 
	if pImage > 0 then 
		junk = GdipDisposeImage(pImage) 
		pImage = 0 
		setPenColor(imageBox,getPixel(imageBox,2,2)) 
		drawRectangle(imageBox,1,0,0,400,400) 
	end if 
end procedure 
 
procedure paintStyleImage(integer self, integer event, sequence params) 
	object result 
	atom p4, iwidth, iheight, factor 
	atom imageBoxGDC 
	if pImage<=0 then  
		return  
	end if 
	if length(params)=0 or params[1]!=WM_PAINT then  
		return 
	end if 
	p4 = allocate(4) 
	result = GdipCreateFromHWND(getHandle(imageBox),p4) 
	if result=0 then 
		imageBoxGDC=peek4u(p4) 
	else 
		imageBoxGDC=0 
	end if 
	result=GdipGetImageWidth(pImage,p4) 
	iwidth = peek4u(p4) 
	result=GdipGetImageHeight(pImage,p4) 
	iheight = peek4u(p4) 
	free(p4) 
	--iwidth = iwidth / 1.2 
	--iheight = iheight / 1.2 
	--result = GdipDrawImageRectI(imageBoxGDC,pImage, 30,30,iwidth,iheight) 
	if iheight > 330 then 
		factor = 330 / iheight 
		iwidth = floor(iwidth * factor) 
		iheight = floor(iheight * factor) 
	end if 
	if iwidth > 350 then 
		factor = 350 / iwidth 
		iwidth = floor(iwidth * factor) 
		iheight = floor(iheight * factor) 
	end if 
	result = GdipDrawImageRectI(imageBoxGDC,pImage, 30,30,iwidth,iheight) 
end procedure 
 
procedure loadImage(sequence imagepath) 
	if length(imagepath)>0 then 
		ppImage = allocate(4) 
		imagepathU = AnsiToUnicode(imagepath) 
		result = GdipLoadImageFromFile(imagepathU,ppImage) 
		FreeUnicode(imagepathU) 
		if result=0 then 
			pImage=peek4u(ppImage) 
		else 
			pImage=0       
		end if 
		free(ppImage) 
		paintStyleImage(-1,-1,{}) 
	else 
		setText(imageBox,"No Image") 
	end if 
end procedure 
 
setHandler(imageBox,w32HAfterEvent,routine_id("paintStyleImage"))