Re: [Newbies] Coloring images with transparant parts
Hi Bert, I have quite a hard time understanding how to use color maps. And I really did not find any helpful documentation on them for Squeak. One example I found in the image is in BitBlt classexampleColorMap. But I don't know how to use it with a Form/BitBlt, well, and what the heck they are actually doing there... In most occasions they used the Bitmap class instead of ColorMap and I couldn't find anything to convert. Could you provide a simple code example on how to modify the color map of a Form? Or any other pointers Thanks a lot, Matthias Am Sat, 22 Nov 2008 01:58:33 +0100 schrieb Bert Freudenberg [EMAIL PROTECTED]: On 22.11.2008, at 01:15, Matthias Korn wrote: Hi, thanks for your hints. I also found ColorFormreplaceColor:with: which does what you describe. But it is unfortunately not what I was looking for. I wasn't very clear in my original post: I (now) have a gray-scale image which I want to colorize, that is I want to change the hue of the image and not just replace a color with another (or floodfill for that matter). Hope you guys have some ideas. I tried searching with the Method Finder, but my poor english didn't take me very far. Use a color map. Your grayscale image could be 8 bits, so with a 256 entries palette you can map that to any color(s) you want. Color maps are used in ColorForm, or directly with BitBlt. - Bert - ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners -- Matthias Korn Institut für Wirtschaftsinformatik Fachbereich 5 Universität Siegen Telefon: +49 (0) 271 / 23 67 660 Mobil: +49 (0) 176 / 700 17 17 8 Uni: +49 (0) 271/ 740 - 3382 eMail: [EMAIL PROTECTED] ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] Coloring images with transparant parts
Off the top of my head, this should make a nice rainbow palette: anArray := (1 to: 256) collect: [:i | Color h: i*360/256 s: 1 v: 1]. someColorForm colors: anArray. So basically the color map is simply an array of Colors. - Bert - On 22.11.2008, at 13:07, Matthias Korn wrote: Hi Bert, I have quite a hard time understanding how to use color maps. And I really did not find any helpful documentation on them for Squeak. One example I found in the image is in BitBlt classexampleColorMap. But I don't know how to use it with a Form/BitBlt, well, and what the heck they are actually doing there... In most occasions they used the Bitmap class instead of ColorMap and I couldn't find anything to convert. Could you provide a simple code example on how to modify the color map of a Form? Or any other pointers Thanks a lot, Matthias Am Sat, 22 Nov 2008 01:58:33 +0100 schrieb Bert Freudenberg [EMAIL PROTECTED]: On 22.11.2008, at 01:15, Matthias Korn wrote: Hi, thanks for your hints. I also found ColorFormreplaceColor:with: which does what you describe. But it is unfortunately not what I was looking for. I wasn't very clear in my original post: I (now) have a gray-scale image which I want to colorize, that is I want to change the hue of the image and not just replace a color with another (or floodfill for that matter). Hope you guys have some ideas. I tried searching with the Method Finder, but my poor english didn't take me very far. Use a color map. Your grayscale image could be 8 bits, so with a 256 entries palette you can map that to any color(s) you want. Color maps are used in ColorForm, or directly with BitBlt. - Bert - ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners -- Matthias Korn Institut für Wirtschaftsinformatik Fachbereich 5 Universität Siegen Telefon: +49 (0) 271 / 23 67 660 Mobil: +49 (0) 176 / 700 17 17 8 Uni: +49 (0) 271/ 740 - 3382 eMail: [EMAIL PROTECTED] ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] Coloring images with transparant parts
Hi, thanks for your hints. I also found ColorFormreplaceColor:with: which does what you describe. But it is unfortunately not what I was looking for. I wasn't very clear in my original post: I (now) have a gray-scale image which I want to colorize, that is I want to change the hue of the image and not just replace a color with another (or floodfill for that matter). Hope you guys have some ideas. I tried searching with the Method Finder, but my poor english didn't take me very far. Thanks a lot. Matthias Am Tue, 18 Nov 2008 15:08:27 +0100 schrieb Matthias Korn [EMAIL PROTECTED]: Hi all, I have a .png or .gif image (e.g. an ImageMorph) with transparent parts (e.g. a circle where the outer part is transparent). I now want to have this one image and color it programmatically with other colors (e.g. the circle appearing in slight red, green, blue ...). Is this possible to do with Squeak/Morphic? How? Thanks, Matthias ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners -- Matthias Korn Institut für Wirtschaftsinformatik Fachbereich 5 Universität Siegen Telefon: +49 (0) 271 / 23 67 660 Mobil: +49 (0) 176 / 700 17 17 8 Uni: +49 (0) 271/ 740 - 3382 eMail: [EMAIL PROTECTED] ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] Coloring images with transparant parts
On 22.11.2008, at 01:15, Matthias Korn wrote: Hi, thanks for your hints. I also found ColorFormreplaceColor:with: which does what you describe. But it is unfortunately not what I was looking for. I wasn't very clear in my original post: I (now) have a gray-scale image which I want to colorize, that is I want to change the hue of the image and not just replace a color with another (or floodfill for that matter). Hope you guys have some ideas. I tried searching with the Method Finder, but my poor english didn't take me very far. Use a color map. Your grayscale image could be 8 bits, so with a 256 entries palette you can map that to any color(s) you want. Color maps are used in ColorForm, or directly with BitBlt. - Bert - ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
[Newbies] Coloring images with transparant parts
Hi all, I have a .png or .gif image (e.g. an ImageMorph) with transparent parts (e.g. a circle where the outer part is transparent). I now want to have this one image and color it programmatically with other colors (e.g. the circle appearing in slight red, green, blue ...). Is this possible to do with Squeak/Morphic? How? Thanks, Matthias ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] Coloring images with transparant parts
Hi, I know it is possible manually, using the paint box. I guess you could fill using a transparent color. I would open the Method finder and search for fill or floodfill. Don't have a squeak image in front of me now, sorry. HTH Matthias On Tue, Nov 18, 2008 at 3:08 PM, Matthias Korn [EMAIL PROTECTED] wrote: Hi all, I have a .png or .gif image (e.g. an ImageMorph) with transparent parts (e.g. a circle where the outer part is transparent). I now want to have this one image and color it programmatically with other colors (e.g. the circle appearing in slight red, green, blue ...). Is this possible to do with Squeak/Morphic? How? Thanks, Matthias ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] Coloring images with transparant parts
On Tuesday 18 Nov 2008 7:38:27 pm Matthias Korn wrote: I have a .png or .gif image (e.g. an ImageMorph) with transparent parts (e.g. a circle where the outer part is transparent). I now want to have this one image and color it programmatically with other colors (e.g. the circle appearing in slight red, green, blue ...). Take a look at SketchMorphrecolorPixelsOfColor: method. Essentially, you will have to make a new sketch by replacing colors in the color map of the sketch's form. HTH .. Subbu ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
