Flipdot-display/src/esp32/display/frames.cpp

#include "display/frames.h"

#include <stdio.h>
#include <string.h>

#include "config.h"
#include "display/text.h"

FlipdotFrames::FlipdotFrames(BROSE9323 &display, PageResources &resources) : _display(display), _resources(resources)
{
}

// Only the dots that changed are sent (unless redraw: the Nano's image is unknown)
uint32_t FlipdotFrames::dynamicPage(const LocalTime &time, uint32_t now, bool redraw)
{
	uint8_t bitmap[BITMAP_BYTES];
	uint32_t wait = renderPage(_dynamic, time, now, _resources, bitmap);
	bool moving = wait != 0;
	// The Nano has no acknowledgement: the next frame waits until it has received this one
	// and flipped its dots, or the next frame overflows its serial buffer
	uint32_t busy = _show(bitmap, !redraw, moving);
	return moving && wait < busy ? busy : wait;
}

void FlipdotFrames::setDrive(uint16_t flip_time, const DriveSettings &drive)
{
	_dot_us = (uint32_t)drive.pulses * (flip_time + drive.flip_gap);
}

// Sends the bitmap; returns about how long the Nano takes to receive and show it in ms
uint32_t FlipdotFrames::_show(const uint8_t *bitmap, bool changes_only, bool instant)
{
	uint32_t dots = 0;
	for (int y = 0; y < BITMAP_HEIGHT; y++)
		for (int x = 0; x < BITMAP_WIDTH; x++)
			dots += bitmapPixel(bitmap, x, y) != _display.shownPixel(x, y);
	size_t chars = _display.showBitmap(bitmap, changes_only, instant);
	if (chars == 0)
		return 0;
	return chars / NANO_CHARS_PER_MS + dots * _dot_us / 1000 + FRAME_MARGIN;
}

void FlipdotFrames::noWifi(int hour, int minute)
{
	char time[6];
	snprintf(time, sizeof(time), "%02d:%02d", hour, minute);
	drawTextLines(_display, "No WiFi", time);
	_display.display();
}

void FlipdotFrames::page()
{
	_drawFullScreen(_page);
}

void FlipdotFrames::live()
{
	_drawFullScreen(_live);
}

void FlipdotFrames::off()
{
	_drawFullScreen(_off);
}

void FlipdotFrames::setDynamicPage(const DynamicPage &page)
{
	_dynamic = page;
}

void FlipdotFrames::setPageBitmap(const uint8_t *bitmap)
{
	memcpy(_page, bitmap, BITMAP_BYTES);
}

void FlipdotFrames::setLiveBitmap(const uint8_t *bitmap)
{
	memcpy(_live, bitmap, BITMAP_BYTES);
}

void FlipdotFrames::setOffBitmap(const uint8_t *bitmap)
{
	if (bitmap)
		memcpy(_off, bitmap, BITMAP_BYTES);
	else
		memset(_off, 0, BITMAP_BYTES);
}

void FlipdotFrames::_drawFullScreen(const uint8_t *bitmap)
{
	_show(bitmap, false, false);
}