Search found 73 matches
- May 29, 2014 14:25
- Forum: Sources, Examples, Tips and Tricks
- Topic: Win: Use arbitrary fonts & load GIF/JPG/PNG to gfx, API only
- Replies: 7
- Views: 4118
Re: Win: Use arbitrary fonts & load GIF/JPG/PNG to gfx, API
Thanks, now I can finally read PNGs in a sane way 8^)
- Oct 31, 2013 18:38
- Forum: Sources, Examples, Tips and Tricks
- Topic: Convert Bitmap to Data statements
- Replies: 6
- Views: 3411
Re: Convert Bitmap to Data statements
One thing you could do to reduce the number of data statements is convert the data to base 85. With that you can encode groups of four bytes in just five characters. With that you can efficiently encode 24 bit images as well, or just about anything, really. Article about Ascii85: http://en.wikipedia...
- Nov 22, 2012 21:38
- Forum: General
- Topic: Hold and modify conversion.
- Replies: 6
- Views: 970
Re: Hold and modify conversion.
If one pixel is far from it's neighbours then it may be better to consider how to get past the following three pixels rather than satisfying the immediate pixel. This is a bit like a Viterbi decoder where all possible tree branches are considered for say the next 4 or 6 pixels. The decision for thi...
- Nov 20, 2012 3:10
- Forum: General
- Topic: Hold and modify conversion.
- Replies: 6
- Views: 970
Re: Hold and modify conversion.
how are a current pixel are calculated from the last pixel is it a difference or what ? As said, you take the RGB values from the previous pixel, and then modify red, green or blue, or you ignore the previous pixel and set the current pixel to a gray value. When converting a 24 bit image, the basic...
- Nov 20, 2012 2:12
- Forum: General
- Topic: Hold and modify conversion.
- Replies: 6
- Views: 970
Hold and modify conversion.
I have a graphics format where for each pixel the previous pixel's RGB value is used (for the first pixel on a line black is used), and then red, green or blue can be modified, or, a pixel can be set to any gray value (previous pixel's value isn't used). All this has been implemented (the easy part)...
- Jan 31, 2012 20:08
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
If people would make a reasonable selection for a counter variable, which normally means a signed 32 or 64-bit integer, then they would have little reason to care about these details. That's what I did with my first example (my second example is fabricated), where I use a uinteger (because I don't ...
- Jan 31, 2012 11:03
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
Consider: For var1 = var2 To var3 Step var4 in FB source code. Consider also that each varx can independently be any one of the following: A literal constant, Byte, Ubyte, Short, Ushort, Integer, Uinteger, Long, Ulong, LongInt, Ulongint, Single or Double. That makes 13^4 = 28,561 combinations possi...
- Jan 31, 2012 3:04
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
@thorham: I disagree but sympathise with you. What you're wanting is the more Pythonesque "for i in range(0, n)" (which to be clear is {0..n-1} but that's not the point), where the loop clearly and explicitly runs over each value in the given range and then exits. Sounds about right. It c...
- Jan 29, 2012 21:07
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
I can’t understand why people keep pointing out this “bug”, and expecting a developer to fix it, when in 32-bit (x86) code there is no good reason to use an iterator smaller than 32 bits. Instead of worrying about the “bug”, the time would be better spent analyzing your coding practices. And what I...
- Jan 29, 2012 18:44
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
1. Because For:Next has always behaved like that and it is expected by experienced programmers. Interesting to learn that experienced programmers accept this bad behavior. 2. Because legacy code using For:Next is fast. Changing the behaviour will slow it down. Why? At the assembler level you still ...
- Jan 29, 2012 6:30
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
You don't use a Ford Festiva to haul a room full of furniture. The use of an 8 bit value for that range is not appropriate to the task. No, it is appropriate simply because all the possible values fit in an unsigned byte. This behavior is a bug, and it should be fixed. The compiler clearly tests fo...
- Jan 29, 2012 0:49
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
Driving a car safely requires defensive driving. That means anticipating and checking the things that may affect your progress later. Likewise, FB requires that while you write your program you anticipate the implications of your choice of variable types, algorithms and order of evaluation. No matt...
- Jan 27, 2012 16:25
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
Re: For next behavior.
Okay, clearly it's bad behavior. The compiler should check the type of the counter variable and use a suitable test condition instead of one that only works for signed values.
- Jan 27, 2012 8:19
- Forum: General
- Topic: For next behavior.
- Replies: 49
- Views: 8058
For next behavior.
Hi, I've encountered some strange FOR NEXT loop behavior: Dim As UInteger t For t=9 To 0 Step -1 Print t Next Sleep Clearly, this should count from 9 to 0, but instead it continues after 0 and starts counting down from 2^32-1. This doesn't happen when t is a signed integer. Is this a bug or is this ...
- Jan 23, 2012 14:59
- Forum: Sources, Examples, Tips and Tricks
- Topic: Floyd Steinberg dithering
- Replies: 12
- Views: 6664
Re: Floyd Steinberg dithering
It shouldn't be that hard to match IrfanView's quality, and the big advantage of writing your own code is that you can add features that IrfanView doesn't have.Coolman wrote:the best software for this kind of conversion is IrfanView ...