Add preliminary support for multiple layered drawing surfaces.
Allows, for example, static content to be loaded into one layer and
remain unmodified while the above layer contains animations.
Particularly useful for drawing PNG or JPEG UI elements which are
then overdrawn with text or animated elements, without paying the
cost of loading/decoding every frame.
MicroPython's GET_STR_DATA_LEN macro returns a const byte array and len, which std::string would copy into heap.
Using string_view lets us wrap the existing const values.
Rewrite RGB565 frame convert to iterate over pixels by index, and transfer the buffer when it fills.
Avoid using a bitmask so BUF_LEN can be arbitrary.
* Absorb ST7735 support into the generic ST7789 driver and rename to PicoGraphics
* Delete obsolete MicroPython modules
* Refactor PicoGraphics to inherited class for each pen type
* Refactor ST7789 and ST7735 to derive from DisplayDriver
* Allow user to set pen_type in MicroPython constructor for RGB565, RGB332, P8 and P4 modes
This allows fonts to be hot-swapped out by calling `set_font`
Unfortunately the way fonts are currently stored limits the maximum height to 8 pixels, since that's the size of a uint8_t and the y dimension is bitwise encoded.
The width can be arbitrary, by specifying the widths and max_width (the multiplier for number of bytes per char).
Might be worth grabbing some more bits from 32blit to make this not terrible, but now a user-defined font is an .hpp and a `set_font` away.
The upstream MicroPython rp2 port has re-enabled -Werror so we need to either fix warnings or,
in the case of those generated by C++/C MicroPython binding weirdness, suppress them.
* typedef pen and constexpr create_pen for #6
* Prevent out of bounds clip permitting write outside buffer
* camelcase rect, point, and pen types
* added triangle(p1, p2, p3) and polygon(std::vector<Point> points) methods to graphics library
* change all uses of pen that were uint16_t into Pen type
* updated micropython modules to use new rect, point, pen naming
* added line(p1, p2) method to pico graphics library with faster vertical/horizontal special cases
Co-authored-by: Jonathan Williamson <jon@pimoroni.com>