Re: [racket-users] saving a BMP in racket

2015-07-27 Thread Matthew Flatt
I've updated `racket/draw` to restore support for writing BMP files.

At Sun, 26 Jul 2015 11:55:51 -0400, 'John Clements' via Racket Users wrote:
 
  On Jul 23, 2015, at 2:47 AM, copycat kangren.c...@gmail.com wrote:
  
  Yes, i can and will try with the old imagemagick bindings.
  
  On Thursday, July 23, 2015 at 6:28:00 AM UTC+8, johnbclements wrote:
  On Jul 20, 2015, at 4:11 AM, copycat kangren.c...@gmail.com wrote:
  
  Hi, not sure if this is considered a bug?
  
  (send model save-file model1.bmp 'bmp)
  
  save-file in bitmap%: kind saving not yet implemented: 'bmp
  
  I found this link, and it's been 2 years since. Is it an update that will 
 take a long time?
  
  http://stackoverflow.com/questions/14987784/how-can-i-save-a-bmp-in-racket
  
  My guess is that no one is currently working on this. I just took a quick 
 1-minute look at the respective wikipedia pages for PNGs and BMPs, and it 
 appears that although in principle BMP can support things that PNG cannot 
 (e.g., arbitrary bit-depth color channels), a PNG is not likely to lose any 
 of 
 the information associated with a racket bitmap%, meaning that generating a 
 PNG and then converting it to a BMP using an external utility should produce 
 the same result as directly creating a BMP. Granted, it’s not as convenient.
  
  Given this, would you consider this issue resolved if the word “yet” was 
 simply removed from the error message?
 
 I’ve reworded this error message and pushed the change; I will cheerfully 
 revert it if anyone objects.
 
 John
 
  
  Best,
  
  John Clements
  
  
  
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Re: [racket-users] saving a BMP in racket

2015-07-26 Thread 'John Clements' via Racket Users

 On Jul 23, 2015, at 2:47 AM, copycat kangren.c...@gmail.com wrote:
 
 Yes, i can and will try with the old imagemagick bindings.
 
 On Thursday, July 23, 2015 at 6:28:00 AM UTC+8, johnbclements wrote:
 On Jul 20, 2015, at 4:11 AM, copycat kangren.c...@gmail.com wrote:
 
 Hi, not sure if this is considered a bug?
 
 (send model save-file model1.bmp 'bmp)
 
 save-file in bitmap%: kind saving not yet implemented: 'bmp
 
 I found this link, and it's been 2 years since. Is it an update that will 
 take a long time?
 
 http://stackoverflow.com/questions/14987784/how-can-i-save-a-bmp-in-racket
 
 My guess is that no one is currently working on this. I just took a quick 
 1-minute look at the respective wikipedia pages for PNGs and BMPs, and it 
 appears that although in principle BMP can support things that PNG cannot 
 (e.g., arbitrary bit-depth color channels), a PNG is not likely to lose any 
 of the information associated with a racket bitmap%, meaning that generating 
 a PNG and then converting it to a BMP using an external utility should 
 produce the same result as directly creating a BMP. Granted, it’s not as 
 convenient.
 
 Given this, would you consider this issue resolved if the word “yet” was 
 simply removed from the error message?

I’ve reworded this error message and pushed the change; I will cheerfully 
revert it if anyone objects.

John

 
 Best,
 
 John Clements
 
 
 
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Re: [racket-users] saving a BMP in racket

2015-07-23 Thread copycat
Yes, i can and will try with the old imagemagick bindings.

On Thursday, July 23, 2015 at 6:28:00 AM UTC+8, johnbclements wrote:
  On Jul 20, 2015, at 4:11 AM, copycat kangren.c...@gmail.com wrote:
  
  Hi, not sure if this is considered a bug?
  
  (send model save-file model1.bmp 'bmp)
  
  save-file in bitmap%: kind saving not yet implemented: 'bmp
  
  I found this link, and it's been 2 years since. Is it an update that will 
  take a long time?
  
  http://stackoverflow.com/questions/14987784/how-can-i-save-a-bmp-in-racket
 
 My guess is that no one is currently working on this. I just took a quick 
 1-minute look at the respective wikipedia pages for PNGs and BMPs, and it 
 appears that although in principle BMP can support things that PNG cannot 
 (e.g., arbitrary bit-depth color channels), a PNG is not likely to lose any 
 of the information associated with a racket bitmap%, meaning that generating 
 a PNG and then converting it to a BMP using an external utility should 
 produce the same result as directly creating a BMP. Granted, it’s not as 
 convenient.
 
 Given this, would you consider this issue resolved if the word “yet” was 
 simply removed from the error message?
 
 Best,
 
 John Clements
 
 
  
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  Racket Users group.
  To unsubscribe from this group and stop receiving emails from it, send an 
  email to racket-users+unsubscr...@googlegroups.com.
  For more options, visit https://groups.google.com/d/optout.

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Re: [racket-users] saving a BMP in racket

2015-07-22 Thread 'John Clements' via Racket Users

 On Jul 20, 2015, at 4:11 AM, copycat kangren.c...@gmail.com wrote:
 
 Hi, not sure if this is considered a bug?
 
 (send model save-file model1.bmp 'bmp)
 
 save-file in bitmap%: kind saving not yet implemented: 'bmp
 
 I found this link, and it's been 2 years since. Is it an update that will 
 take a long time?
 
 http://stackoverflow.com/questions/14987784/how-can-i-save-a-bmp-in-racket

My guess is that no one is currently working on this. I just took a quick 
1-minute look at the respective wikipedia pages for PNGs and BMPs, and it 
appears that although in principle BMP can support things that PNG cannot 
(e.g., arbitrary bit-depth color channels), a PNG is not likely to lose any of 
the information associated with a racket bitmap%, meaning that generating a PNG 
and then converting it to a BMP using an external utility should produce the 
same result as directly creating a BMP. Granted, it’s not as convenient.

Given this, would you consider this issue resolved if the word “yet” was simply 
removed from the error message?

Best,

John Clements


 
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[racket-users] saving a BMP in racket

2015-07-20 Thread copycat
Hi, not sure if this is considered a bug?

(send model save-file model1.bmp 'bmp)

save-file in bitmap%: kind saving not yet implemented: 'bmp

I found this link, and it's been 2 years since. Is it an update that will take 
a long time?

http://stackoverflow.com/questions/14987784/how-can-i-save-a-bmp-in-racket

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