What is the structure of a bitmap in Pebble-SDK on basalt

Question

Using graphics_capture_frame_buffer a GBitmap is returned. What is the format of this if I wanted to work with it directly. How would I modify a single pixel?

Answer 1

In Pebble 3.0 you can use the gbitmap_* accessors:

• gbitmap_get_data() to get the bytes of data
• gbitmap_get_format() to confirm the format of the Bitmap (should be 8bit per pixel on Basalt)
• gbitmap_get_bytes_per_row() to get the number of bytes in each row

When the format is GBitmapFormat8Bit, each pixel is one byte in ARGB (2bits per component).