How to send ssd1306 display buffer to html page as image?

Question

Arduino

Hello, I want to send an image of my ssd1306 display to the html page. How can this be implemented? Please provide an example code. I'm using the ssd1306_adafruit library, I get the display buffer display.getBuffer() and I don't know what to do next. The return value of the buffer is of type uint8_t*. I want to note that I use an esp32 board. I am creating a WiFi hotspot and this hotspot has an html page at 192.168.4.1. Sending to the page is done via client.send (), I would put a buffer here, but unfortunately it does not accept a type.

Answer 1

.getBuffer() gives a pointer to the beginning of the display buffer.
1. Read the buffer
2. Write a display emulator in js
3. Feed the resulting buffer to the emulator
4. Profit (get the display image from the buffer)

Answer 2

The return value of a buffer of type uint8_t*.

An asterisk in a type denotes a pointer, i.e. actually stores the address in memory where the variable lies, and not the value of the variable itself. Further, adafruit uses the Adafruit-GFX unified graphics library, which stores the pixel color value as uint8_t, i.e. "unsigned int", occupying 2 bytes in memory. You need to read from RAM a one-dimensional uint8_t array, the size of which is equal to the number of display pixels. What to do next has already been answered by milssky.