Hi Michael, I am still confused. :-( I cannot figure out how to get the FPImage drawn. I thought perhaps the TImage.canvas.draw() function would do it - the code completion shows a draw(int, int, FPCustomImage) method, but when I compile it the compiler says it it expects a TGraphic. Sure enough, the TCanvas has one that expects TGraphic, and FPCanvas has one with FPCustomImage, but it is not marked as overloaded, so I think the compiler assumes it is not available. I tried to find a way to get a TGraphic object from a FPCustomImage, but no success.
Thanks again for the help. Charl On 5/31/07, Charl van Jaarsveldt <[EMAIL PROTECTED]> wrote:
Ah, that would probably explain why I can't find it. :-) Yeah, I want to keep a cache of images in memory while keeping open the possibility of actually saving the cache. Thanks for the help! Charl On 5/31/07, Michael Van Canneyt <[EMAIL PROTECTED]> wrote: > > > > On Thu, 31 May 2007, Charl van Jaarsveldt wrote: > > > Thanks for the pointers. I can't find the extinterpolation unit > though. > > in the FPC source tree: > > packages/fcl-image/src/extinterpolation.pp > > (it may not be present if you're working with the the 2.0.4 release) > > > > > I think I am getting an idea of how to do what I want. The only thing > that > > eludes me is how to get the FPImage into the TImage control? The class > > > hierarchy seems rather confusing there. :-( > > If you just want to draw it, simply draw on the TImage canvas, that > should work. > > But TImage itself has resizing capabilities, the imgview demo shows how > to do this. The disadvantage is that you can't save the resized image, > as far as I know. > > Michael. > > > > > Thanks > > Charl > > > > PS Please excuse my ignorance, this is the first time I am working > with > > images! > > > > On 5/31/07, Michael Van Canneyt <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > On Thu, 31 May 2007, Charl van Jaarsveldt wrote: > > > > > > > Hi, > > > > > > > > What is the best way to resize an image? I am thinking of > something > > > Java's > > > > Image class has that will return a scaled image, and you can > decide > > > whether > > > > it should be a good quality or a fast one. I don't necessarily > want to > > > write > > > > it to a file, just in memory. (I want to cache images in the > memory and > > > so > > > > would like to have them much smaller than they are.) > > > > > > There are several resizing alogirthms present in FPC. see the > > > extinterpolation unit. > > > how it happens is: create a canvas, and draw the image on the canvas > with > > > the correct > > > interpolation. > > > > > > If you want to create a new image in memory, create an > TFPImageCanvas with > > > the desired > > > size, and draw the original canvas with the correct interpolation > routine. > > > > > > Michael. > > > > > > _________________________________________________________________ > > > To unsubscribe: mail [EMAIL PROTECTED] with > > > "unsubscribe" as the Subject > > > archives at http://www.lazarus.freepascal.org/mailarchives > > > > > > > > > > > -- > > "I love deadlines. I especially love the whooshing sound they make as > they > > fly by." - Douglas Adams > > > > _________________________________________________________________ > To unsubscribe: mail [EMAIL PROTECTED] with > "unsubscribe" as the Subject > archives at http://www.lazarus.freepascal.org/mailarchives > -- "I love deadlines. I especially love the whooshing sound they make as they fly by." - Douglas Adams
-- "I love deadlines. I especially love the whooshing sound they make as they fly by." - Douglas Adams
