Drawing custom characters on a TFT display

Using Arduino Programming Questions
1

I am drawing some custom made warning signs on a TFT display. Since loading a bmp from memory would take too long I am using the primitive functions (Adafruit library) to draw circles, triangles, etc.

I am currently trying to draw half circles to display a Brake indicator light and a high beam indicator, without success.

Here are the symbols I need to display:


Alternatively I could perhaps store then as a monochrome bitmap in flash memory and load them from there, but I would need to define the background color as red or blue instead of white.
The icons will be 80*80px or smaller

Is this achievable? Any recommendations perhaps?

2

I am currently trying to draw half circles to display a Brake indicator light and a high beam indicator, without success.

"It doesn't work" but I'm not going to post any code or explain what the code actually does.

Did I paraphrase you correctly?

3

PaulS:

I am currently trying to draw half circles to display a Brake indicator light and a high beam indicator, without success.

"It doesn't work" but I'm not going to post any code or explain what the code actually does.

Did I paraphrase you correctly?

Absolutelly. I cant write code for a function that does not exist, therefore looking for alternatives.

4

I cant write code for a function that does not exist

Isn't that why you write code? To create a function that didn't previously exist?

You said that you were trying to create the symbols using lines and arcs. Were you? Or were you simply complaining that no one else had?

5

I have about a dozen other symbols drawn that way but for those in particular its not feasible to use the above method with the functions provided by the library. To make a curved line either I draw a full circle and delete any unnecessary parts or I have to draw point by point, which takes a significant ammount of time.

A typical 80x80px 24bit bitmap takes 150ms to load with my current configuration. I can only assume a monochrome bitmap would take about 20 to 30ms, but I found no toturials on how to load them to a colour screen. Perhaps you could sugest something?