BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Proportional Image          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message Claude Tadonki Guest Posted: Wed Apr 06, 2005 3:05 pm    Post subject: Proportional Image Hello, I ave a TImage component (Image1) with the property Proportionnal set to TRUE. How can I save this image with its proportional size ? When I just do Image1->Picture->SaveToFile("MyFile"); I get the image with its original size. Where can I get the sizes of the new proportional(ized) image ? Many thanks. Claude Back to top Hans Galema Guest Posted: Wed Apr 06, 2005 3:14 pm    Post subject: Re: Proportional Image Claude Tadonki wrote: Quote: I ave a TImage component (Image1) with the property Proportionnal set to TRUE. Is that bcb6 ? Don't see that property with bcb5. Hans. Back to top Claude Tadonki Guest Posted: Wed Apr 06, 2005 4:02 pm    Post subject: Re: Proportional Image YES, IT IS BCB6. I think the problem would be the same with the STRECH property. Hans Galema wrote: Quote: Claude Tadonki wrote: I ave a TImage component (Image1) with the property Proportionnal set to TRUE. Is that bcb6 ? Don't see that property with bcb5. Hans. Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 06, 2005 5:28 pm    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: YES, IT IS BCB6. I think the problem would be the same with the STRECH property. Proportional and Stretch only affect the *display* of a graphic. They do not alter the graphic data itself. Gambit Back to top Claude Tadonki Guest Posted: Wed Apr 06, 2005 6:30 pm    Post subject: Re: Proportional Image Remy Lebeau (TeamB) wrote: Quote: Proportional and Stretch only affect the *display* of a graphic. They do not alter the graphic data itself. Gambit Yes, but I need to save the image as it is displayed. Means that I am interested in the resized image and its property ( width and height). How can I do ? Regards, Claude Back to top Jonathan Benedicto Guest Posted: Wed Apr 06, 2005 6:52 pm    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: Yes, but I need to save the image as it is displayed. Means that I am interested in the resized image and its property ( width and height). How can I do ? // Untested Graphics::TBitmap* Bitmap = new Graphics::TBitmap(); Bitmap->Width = Image1->Width; Bitmap->Height = Image1->Height; Bitmap->Canvas->StretchDraw(TRect(0, 0, Bitmap->Width, Bitmap->Height), Image1->Picture->Graphic); Bitmap->SaveToFile("mypic.bmp"); delete Bitmap; Back to top Claude Tadonki Guest Posted: Wed Apr 06, 2005 7:47 pm    Post subject: Re: Proportional Image Quote: Graphics::TBitmap* Bitmap = new Graphics::TBitmap(); Bitmap->Width = Image1->Width; Bitmap->Height = Image1->Height; Bitmap->Canvas->StretchDraw(TRect(0, 0, Bitmap->Width, Bitmap->Height), Image1->Picture->Graphic); Bitmap->SaveToFile("mypic.bmp"); delete Bitmap; Thanks for the sugestion. The problem with this code is that Image1->Width and Image1->Height still related to the original image. May be I can use the StrechDraw routine with the Width and Height of the proportional(ized) image, but I need to know how to calculated the Width and Height of the proportional(ized) image from that of the original image. Back to top Jonathan Benedicto Guest Posted: Wed Apr 06, 2005 8:06 pm    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: Thanks for the sugestion. The problem with this code is that Image1->Width and Image1->Height still related to the original image. May be I can use the StrechDraw routine with the Width and Height of the proportional(ized) image, but I need to know how to calculated the Width and Height of the proportional(ized) image from that of the original image. I don't have BCB6, but I think that the Image1->Width / Height should be the size of the scaled image. Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 06, 2005 8:18 pm    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: Yes, but I need to save the image as it is displayed. Why? Quote: Means that I am interested in the resized image and its property ( width and height). The VCL does not provide that. You will have to create a secondary bitmap, copy/stretch the original over to the secondary bitmap as needed, and then save the secondary bitmap rather than the original. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 06, 2005 8:19 pm    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: The problem with this code is that Image1->Width and Image1->Height still related to the original image. Image1->Width/Height are the actual display sizes, not the physical data sizes. Gambit Back to top Claude Tadonki Guest Posted: Thu Apr 07, 2005 12:27 am    Post subject: Re: Proportional Image Remy Lebeau (TeamB) wrote: Quote: Image1->Width/Height are the actual display sizes, not the physical data sizes. Yes, but the values are always that used at the the design time. For instance, if thw resized image is 200x500 and Image1 is 400x600, I will always get 400 and 600 with Image->Width/Height. Back to top Remy Lebeau (TeamB) Guest Posted: Thu Apr 07, 2005 6:41 am    Post subject: Re: Proportional Image "Claude Tadonki" <claude.tadonki (AT) bluewin (DOT) ch> wrote Quote: Yes, but the values are always that used at the the design time. For instance, if thw resized image is 200x500 and Image1 is 400x600, I will always get 400 and 600 with Image->Width/Height. The only way to get access to the proportional dimensions that TImage calculates is to derive a new component from TImage so that you can then access the protected DestRect() method. That is the same method that TImage::Paint() uses to know where to draw. 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