I am working with an M5Stack Core S3 using the <M5Unified.h> library. I successfully display a 32×32 bitmap stored as a uint16_t array (RGB565 format) using M5.Display.drawBitmap() (see my code below). The bitmap represents a small animal, but at its native resolution it appears too small on the display (see the result below). At the moment, M5.Display.drawBitmap() draws the image at a 1:1 pixel ratio, and I don’t see an obvious way to apply scaling. How to scale the image by an integer factor (for example, 2 or 3) so that it appears larger on the display?
My result:
My main.cpp code:
#include <M5Unified.h>
constexpr int IMG_W = 32;
constexpr int IMG_H = 32;
const uint16_t myBitmap[IMG_W * IMG_H] = {
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xffff, 0x0823, 0x0000, 0x0000, 0x0000, 0x0823, 0xffff, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xffff, 0xffff, 0x0823, 0x0823, 0x0823, 0xffff, 0xffff, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xff39, 0x0823, 0x0823, 0xff39, 0xff39, 0xff39, 0x0823, 0x0823, 0xff39, 0xff39, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xff39, 0xf653, 0x0823, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0x0823, 0xff39, 0xf653, 0xff39, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xff39, 0x0823, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0x0823, 0xff39, 0xff39, 0xf653, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xff39, 0x0823, 0xff39, 0x0823, 0xff39, 0xff39, 0x0823, 0xff39, 0xff39, 0x0823, 0xff39, 0xf653, 0x0823, 0x0823, 0x0823, 0x0823, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0823, 0xff39, 0x0823, 0xff39, 0xff39, 0x0823, 0xff39, 0xff39, 0xf653, 0x0823, 0x0823, 0x0823, 0xf653, 0xff39, 0xff39, 0xff39, 0xff39, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xf653, 0xf653, 0xf653, 0xf653, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xfd35, 0xfd35, 0xfd35, 0xfd35, 0xff39, 0xff39, 0xff39, 0xf653, 0xf653, 0xf653, 0xf653, 0xf653, 0xf653, 0xff39, 0xff39, 0xff39, 0xff39, 0xff39, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xf410, 0xfd35, 0xf410, 0xfd35, 0xfd35, 0xf653, 0xf653, 0xf653, 0x0823, 0xf653, 0xf653, 0xf653, 0xf653, 0xf653, 0xf653, 0xff39, 0xff39, 0xf653, 0x0823, 0xf653, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xfd35, 0xfd35, 0xfd35, 0xfd35, 0xfd35, 0xf653, 0x0823, 0x0823, 0xe4ed, 0xf653, 0xf653, 0xff39, 0xff39, 0xf653, 0xf653, 0xf653, 0xf653, 0xf653, 0x0823, 0xe4ed, 0xf653, 0x0823, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0823, 0x0823, 0x0823, 0x0823, 0x0823, 0xe4ed, 0xe4ed, 0xf653, 0xf653, 0xff39, 0xff39, 0xff39, 0xff39, 0xf653, 0xf653, 0xf653, 0xe4ed, 0x0823, 0x0823, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xf653, 0xf653, 0xf653, 0xf653, 0xff39, 0xff39, 0xff39, 0xe4ed, 0xf653, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xf653, 0xe4ed, 0x0823, 0x0823, 0x0823, 0xe4ed, 0xe4ed, 0xe4ed, 0x0823, 0x0823, 0x0823, 0x0823, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xf653, 0xe4ed, 0x0823, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0xf653, 0xe4ed, 0x0823, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0823, 0xe4ed, 0xe4ed, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0823, 0x0823, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
};
void setup() {
auto cfg = M5.config();
M5.begin(cfg);
M5.Display.clear(TFT_BLACK);
M5.Display.drawBitmap(50,50,IMG_W,IMG_H,myBitmap);
}
void loop() {
}
My development enviroment:
- Windows 10 Pro 22H2
- Visual Studio Code 1.99.1 with PlatformIO 3.3.4
- M5Stack Core S3