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Sorry, been tied up, only just seen this. If someone is needed for some day I'm sure I could do something but can't guarantee quick responses to guesses!
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I think we're covered Rich
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Happiness will never come to those who fail to appreciate what they already have. -Anon
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Within you lies the power for good - Use it!
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So I ran into a bit of a conundrum.
Because of the way my user interface library works, it might draw half your control to a bitmap send that bitmap to the screen, and then repeat the process with the other half.
A canvas is bound to a bitmap, and while I can change the bounds after the canvas is created, it will try to write to areas where the bitmap isn't present. When using callbacks, this is simply a performance issue. When using directing binding to the bitmap, this is an access violation.
One option is to create a new canvas the size of the bitmap in UIX (my user interface lib) every time i refresh that control on the screen, but there are so many problems with this, starting with the size of that backing bitmap being an implementation detail, and that's not counting the performance issue of creating and destroying canvases all the time, when I should just be able to rebind it to a new bitmap.
And the performance issue I mentioned in passing above is a real problem in UIX's case because maybe half the control will be drawn at once and the callbacks will be fired for ALL of it, half of it in vain as they get clipped from the final output.
What I needed was a way to clip the drawing in my vector library, such that I could specify a clipping rectangle that perfectly overlays the backing bitmap. If I do that, the rasterizer never has to touch those "out of bounds" areas, saving time and potentially crashes.
Well, I'm halfway there, but a bit overwhelmed and sort of procrastinating the rest of it.
There's something I want to do after I complete this portion - and that is I want to support direct binds to an RGB565 bitmap. However, it gets a bit weird because there's no alpha channel in that color model. Currently I can only bind directly to an RGBA8888 bitmap, which isn't very practical on embedded in most situations. Situations where I can't bind directly use callbacks to do the final pixel reads/writes.
I'm excited about that part. I want the challenge, but I'm stuck with the clipping problem first.
Pizza incoming. That should fix it. 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Pizza can fix a lot of things. So can a rubber duck. It seems like you should invest in one. 
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Greg Utas wrote: So can a rubber duck.
Aye! 
/ravi
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Greg Utas wrote: So can a rubber duck. It seems like you should invest in one
Tired of hearing from me, eh? 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Ohhh!
We're the rubber duck!
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Aha! You got it!
- I would love to change the world, but they wonβt give me the source code.
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Nah. Your streams of consciousness are usually interesting.
But a duck interacts with you, so you wouldn't have to anticipate all the details that you must first explain!
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I am staying with my dad in hospital and I will be getting to bed sometime in the mid morning.
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![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif) I've got one ready.
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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Thanks for letting us know Pete
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Update 3: Update 2 was wrong, and boy am I glad to be wrong. Turns out I was misinterpreting a niggling little detail of the spec. Once i fixed that, my code rendered my test documents.
Update 2: I can't support TinyVG without tearing apart my rasterizer. It uses even-odd rule even when elements overlap. My rasterizer doesn't. Mine is more compatible with the way SVG and Truetype do things. TinyVGs method is one off, but I'm not inclined to try to hack it apart to support both.  
Update: I've got TVG partially working. It's rendering some documents but not others. I think it's funny that my much more complicated SVG code works better than the one that renders the simple TVG format.
_________________________________________________________________________
TVG is a compact, simplified vector graphics file format.
After speaking with the author of TinyVG[^] it's not as vaporwarey as I thought.
You can turn SVGs into TVGs by first running the SVG through a 3rd party tool called SVGO.
I've got an initial render (imperfect) in TVG now, so my code is working somewhat.
Currently the reference implementation provided by the author is in Zig, which is unfortunate, since it's a reference implementation and Zig is still a boutique language.
I intend to provide the author a couple of things.
1. A reference implementation, probably in C
2. A better SVG->TVG conversion tool that doesn't require running things though SVGO first.
But first I need to perfect my TVG support and wrap up my htcw_gfx 2.0 release.
I'm feeling pretty good about this.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
modified yesterday.
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honey the codewitch wrote: But first I need to
"... crush your my enemies, see them driven before you me, and hear the lamentations of their women"
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That'll be old Genghis
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Wordle 1,205 4/6*
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