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Mr. Mago
#1 / 7
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 transparent bitmap
how do you make all of the black pixels in a bitmap
transparent when you display it in GDI+
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| Thu, 24 Feb 2005 08:13:54 GMT |
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ClayB [Syncfusion
#2 / 7
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transparent bitmap Try calling the MakeTransparent member of your bitmap passing Color.Black as its argument. ==================
Clay Burch
Syncfusion, Inc.
Visit www.syncfusion.com to download a free trial of Essential Suite
Quote: > how do you make all of the black pixels in a bitmap
> transparent when you display it in GDI+
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| Thu, 24 Feb 2005 08:50:49 GMT |
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Mr. Mago
#3 / 7
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transparent bitmap how do I use MakeTransparent? it isnt comming up on intellisense. This is the bitmap im displaying: Image antsImage;
antsImage = new Bitmap("ants.bmp");
Brush ants = new TextureBrush(antsImage, new Rectangle
(0,0,256,256));
backBuffer.FillRectangle(ants,200,200,256,256);
Quote: >-----Original Message-----
>Try calling the MakeTransparent member of your bitmap
passing Color.Black as Quote: >its argument. >==================
>Clay Burch
>Syncfusion, Inc.
>Visit www.syncfusion.com to download a free trial of
Essential Suite
>> how do you make all of the black pixels in a bitmap
>> transparent when you display it in GDI+
>.
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| Thu, 24 Feb 2005 09:41:56 GMT |
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Mr. Mago
#4 / 7
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transparent bitmap when I try it like this: Image antsImage;
antsImage = new Bitmap("ants.bmp");
Brush ants = new TextureBrush(antsImage, new Rectangle
(0,0,256,256));
antsImage.MakeTransparent(Color.Black);
backBuffer.FillRectangle(ants,200,200,256,256);
I get this error:
C:\2501\2501\Form1.cs(61): 'System.Drawing.Image' does
not contain a definition for 'MakeTransparent'
What should I do?
Quote: >-----Original Message-----
>Try calling the MakeTransparent member of your bitmap
passing Color.Black as Quote: >its argument. >==================
>Clay Burch
>Syncfusion, Inc.
>Visit www.syncfusion.com to download a free trial of
Essential Suite
>> how do you make all of the black pixels in a bitmap
>> transparent when you display it in GDI+
>.
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| Thu, 24 Feb 2005 09:51:18 GMT |
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Erik Brow
#5 / 7
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transparent bitmap Try changing you "antsImage" variable to be a Bitmap class instance rather than an Image. Bitmap antsImage;
antsImage = new Bitmap("ants.bmp");
Brush ants = new TextureBrush(antsImage, new Rectangle(0,0,256,256));
antsImage.MakeTransparent(Color.Black);
============
Erik Brown
Author of "Windows Forms Programming with C#"
http://www.amazon.com/exec/obidos/ASIN/1930110286
Quote: > when I try it like this: > Image antsImage;
> antsImage = new Bitmap("ants.bmp");
> Brush ants = new TextureBrush(antsImage, new Rectangle
> (0,0,256,256));
> antsImage.MakeTransparent(Color.Black);
> backBuffer.FillRectangle(ants,200,200,256,256);
> I get this error:
> C:\2501\2501\Form1.cs(61): 'System.Drawing.Image' does
> not contain a definition for 'MakeTransparent'
> What should I do?
> >-----Original Message-----
> >Try calling the MakeTransparent member of your bitmap
> passing Color.Black as
> >its argument.
> >==================
> >Clay Burch
> >Syncfusion, Inc.
> >Visit www.syncfusion.com to download a free trial of
> Essential Suite
> >> how do you make all of the black pixels in a bitmap
> >> transparent when you display it in GDI+
> >.
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| Thu, 24 Feb 2005 12:21:43 GMT |
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Mr. Mago
#6 / 7
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transparent bitmap that fixed it, thanks Quote: >-----Original Message-----
>Try changing you "antsImage" variable to be a Bitmap
class instance rather Quote: >than an Image. >Bitmap antsImage;
>antsImage = new Bitmap("ants.bmp");
>Brush ants = new TextureBrush(antsImage, new Rectangle
(0,0,256,256));
>antsImage.MakeTransparent(Color.Black);
>============
>Erik Brown
>Author of "Windows Forms Programming with C#"
>http://www.amazon.com/exec/obidos/ASIN/1930110286
>> when I try it like this:
>> Image antsImage;
>> antsImage = new Bitmap("ants.bmp");
>> Brush ants = new TextureBrush(antsImage, new Rectangle
>> (0,0,256,256));
>> antsImage.MakeTransparent(Color.Black);
>> backBuffer.FillRectangle(ants,200,200,256,256);
>> I get this error:
>> C:\2501\2501\Form1.cs(61): 'System.Drawing.Image' does
>> not contain a definition for 'MakeTransparent'
>> What should I do?
>> >-----Original Message-----
>> >Try calling the MakeTransparent member of your bitmap
>> passing Color.Black as
>> >its argument.
>> >==================
>> >Clay Burch
>> >Syncfusion, Inc.
>> >Visit www.syncfusion.com to download a free trial of
>> Essential Suite
>> >> how do you make all of the black pixels in a bitmap
>> >> transparent when you display it in GDI+
>> >.
>.
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| Thu, 24 Feb 2005 13:15:11 GMT |
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Ryan Dawso
#7 / 7
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transparent bitmap Mr. Magoo, Just for reference, you can always change your brush to have a selected
alpha value:
SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(100, 0, 50, 255));
--
Hope this Helps.
Ryan Dawson
Quote: > that fixed it, thanks > >-----Original Message-----
> >Try changing you "antsImage" variable to be a Bitmap
> class instance rather
> >than an Image.
> >Bitmap antsImage;
> >antsImage = new Bitmap("ants.bmp");
> >Brush ants = new TextureBrush(antsImage, new Rectangle
> (0,0,256,256));
> >antsImage.MakeTransparent(Color.Black);
> >============
> >Erik Brown
> >Author of "Windows Forms Programming with C#"
> >http://www.amazon.com/exec/obidos/ASIN/1930110286
> >> when I try it like this:
> >> Image antsImage;
> >> antsImage = new Bitmap("ants.bmp");
> >> Brush ants = new TextureBrush(antsImage, new Rectangle
> >> (0,0,256,256));
> >> antsImage.MakeTransparent(Color.Black);
> >> backBuffer.FillRectangle(ants,200,200,256,256);
> >> I get this error:
> >> C:\2501\2501\Form1.cs(61): 'System.Drawing.Image' does
> >> not contain a definition for 'MakeTransparent'
> >> What should I do?
> >> >-----Original Message-----
> >> >Try calling the MakeTransparent member of your bitmap
> >> passing Color.Black as
> >> >its argument.
> >> >==================
> >> >Clay Burch
> >> >Syncfusion, Inc.
> >> >Visit www.syncfusion.com to download a free trial of
> >> Essential Suite
> >> >> how do you make all of the black pixels in a bitmap
> >> >> transparent when you display it in GDI+
> >> >.
> >.
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| Fri, 25 Feb 2005 00:17:51 GMT |
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