New topic: MASKING help
<http://forums.realsoftware.com/viewtopic.php?t=46689> Page 1 of 1 [ 6 posts ] Previous topic | Next topic Author Message DaveS Post subject: MASKING helpPosted: Thu Jan 24, 2013 10:17 pm Joined: Sun Aug 05, 2007 10:46 am Posts: 4459 Location: San Diego, CA I have the following code (which doesn't work right, hence this plea for help) I need to draw a ROUND RECTANGLE filled with a Pattern. DRAW_PATTERN returns a SQUARE RECTANGLE with the pattern in it. Then I am trying to MASK the RoundRect part. G is another picture, where the PatternFilled RoundRect will end up. If I want to draw it OPAQUE (If option_Draw_Opaque=0) then I get exactly what I want but if I want to make any WHITE INSIDE the RoundRect also transparent (If option_Draw_Opaque=1) it does NOT work and the RoundRect is displayed as SOLID BLACK I look for BLACK in the mask if pixel(xx,yy).red=0 and white in the Image by looking at the R/G/B ... seems =&CFFFFFF doesn't work. ' Create a CrossHatch Filled Picture p=Draw_Pattern(x,y,w,h,pat_id) ' Mask off Picture m=p.Mask.Graphics m.ForeColor=&cffffff m.FillRect 0,0,w,h ' Set the RoundRect portion to Transparent m.ForeColor=&c000000 m.fillroundrect 0,0,w,h,arcw,arch ///// good to this point as long as option_Draw_Opaque=0 ' if =1 then we want any part of the Pattern that is WHITE to be Transparent also If option_Draw_Opaque=1 Then rsG=p.RGBSurface ' Top layer (with crosshatch) rsM=p.Mask.RGBSurface ' Mask Layer already masked to RoundRect Shape // // Scan the Bounding Rectangle. If Mask=Black and Image is White.. Set Mask to White also so it will be transparent // For yy=0 To h For xx=0 To w clr=rsG.Pixel(xx,yy) If rsM.pixel(xx,yy).red=0 And clr.red=255 and clr.green=255 and clr.blue=255 Then ' black rsM.pixel(xx,yy)=&cffffff End If Next xx Next yy End If // Now plaster Masked image on to MAIN graphic area g.DrawPicture p,x,y,w,h, 0,0,w,h _________________ Dave Sisemore MacPro, OSX Lion 10.7.4 RB2012r1 Note : I am not interested in any solutions that involve custom Plug-ins of any kind Top timhare Post subject: Re: MASKING helpPosted: Thu Jan 24, 2013 11:08 pm Joined: Fri Jan 06, 2006 3:21 pm Posts: 12015 Location: Portland, OR USA Have DrawPattern do the work. Create a picture object. Fill the mask with white (transparent). Draw each line in the pattern. Draw that same line in black in the mask (opaque). The result is an image where the space between the crosshatches is transparent. Make another picture object. Fill its mask with black (opaque). Draw a white round rect in the mask (transparent) Draw the pattern into the picture. Tim Top DaveS Post subject: Re: MASKING helpPosted: Fri Jan 25, 2013 1:22 am Joined: Sun Aug 05, 2007 10:46 am Posts: 4459 Location: San Diego, CA The problem with that is two-fold 1) If the pattern is to be transparent is optional.. maybe the user wants that, maybe they don't (hence the option_DrawOpaque flag) 2) Sometimes the pattern can't be transparent... if there is TWO non-white colors involved. Also, the Patterns are BitMap templates stored as 32x32 tiles in a PNG file (which is Black/White only). Color is applied using TRANSFORM maps.. This is why I want/need to apply the transparency via a MASK.... and I cannot figure out why the posted code is not producing the results I desire. _________________ Dave Sisemore MacPro, OSX Lion 10.7.4 RB2012r1 Note : I am not interested in any solutions that involve custom Plug-ins of any kind Top HMARROQUINC Post subject: Re: MASKING helpPosted: Fri Jan 25, 2013 1:42 am Joined: Sun Jan 25, 2009 5:11 pm Posts: 344 Location: Guatemala, Central America Not topic related but... Your Personal information link is down and the screenshot for Fotofixer is missing. Sincerely, The web police _________________ Future RS guru Top timhare Post subject: Re: MASKING helpPosted: Fri Jan 25, 2013 2:06 am Joined: Fri Jan 06, 2006 3:21 pm Posts: 12015 Location: Portland, OR USA DaveS wrote:' Mask off Picture m=p.Mask.Graphics m.ForeColor=&cffffff m.FillRect 0,0,w,h ' Set the RoundRect portion to Transparent m.ForeColor=&c000000 m.fillroundrect 0,0,w,h,arcw,arch You have the colors reversed here. &cffffff is transparent, &c000000 is opaque. EDIT: nvm, the code is right, the comment is wrong. ' Set the RoundRect portion to Opaque Top timhare Post subject: Re: MASKING helpPosted: Fri Jan 25, 2013 2:20 am Joined: Fri Jan 06, 2006 3:21 pm Posts: 12015 Location: Portland, OR USA I copied your code into a canvas, dimmed all the variables and it works both ways. There's something else going on. I assume this is part of a larger piece of code and your image is getting trashed in the parts you didn't show us. 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