Odin/examples/stb_image.odin

type Bitmap: struct {
	width, height: i32,
	comp: i32,
	data: []u8,
}

make_bitmap :: proc(filename: string) -> Bitmap {
	stbi_load :: proc(filename: ^u8, x, y, comp: ^i32, req_comp: i32) -> ^u8 #foreign

	c_buf: [1024]u8
	bytes :=  filename as []byte
	str_len := copy(c_buf[:], bytes)

	b: Bitmap
	pixels := stbi_load(^c_buf[0], ^b.width, ^b.height, ^b.comp, 4)
	len := (b.width*b.height*b.comp) as int
	b.data = slice_ptr(pixels, len)

	return b
}

destroy_bitmap :: proc(b: ^Bitmap) {
	stbi_image_free :: proc(retval_from_stbi_load: rawptr) #foreign

	stbi_image_free(^b.data[0])
	b.data   = b.data[:0]
	b.width  = 0
	b.height = 0
	b.comp   = 0
}