bitmap_tools

Tools for Windows bitmap (Windows V3 format) or any images by Python3.
日本語/Japanese

Overview

I will publish the scripts I needed to create my game on M5Stack.

Tools

reorder_palette.py

Reorder and combine palette colors for 16 colors (4bit depth) bitmap.

• If not exists transpalent color RGB(255,0,255) then add to bitmap.
• Combine the same colors into one. If the result is less than 16 colors, it is padded.
• Sort palettes ascending by RGB, However the index of transparent color is fixed at 0
• Output bitmap that reordered palette colors applied.

usage

python3 reorder_palette.py src_bitmap.bmp dest_bitmap.bmp

make_lgfxbmpfont.py

Output C style source to stdout in GFXfont, FixedBMPfont, and GLCDfont format.
(Only monospaced font.)

• You can specify image files supported by the Pillow.
• Load image and binarize.
• Crop to the size specified by the argument
• Output to stdout as if starting from the code specified by the argument.
• It can be displayed in LovyanGFX or any library that supports font output.

See also

LovyanGFX v0
LovyanGFX v1

require

Pillow
numpy

usage

python3 make_lgfxbmpfont.py src_image_path -width 8 -height 8 --name example --code 32 > example_font.h

output example(--format GFX)

const uint8_t example_bitmaps[] PROGMEM = {
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,	// ' '
    0x1c,0x1c,0x1c,0x18,0x18,0x00,0x18,0x00,	// '!'
    0x36,0x36,0x24,0x00,0x00,0x00,0x00,0x00,	// '"'
.
.
.

};
const GFXglyph example_glyphs[] PROGMEM = {
    { 0, 8, 8, 8, 0, -8 },	//' '
    { 8, 8, 8, 8, 0, -8 },	//'!'
    { 16, 8, 8, 8, 0, -8 },	//'"'
.
.
.

};
const GFXfont example_font PROGMEM = {
 (uint8_t*)example_bitmaps, (GFXglyph*)example_glyphs, 0x20, 0x5f, 8 };

Utilities

gob_bitmap.py

Windows bitmap accessor.
reorder_palette.py use the gob_bitmap.py.

Remarks

Windows V3 BITMAPINFOHEADER

If you want to convert format of images. see also ImageMagic