def show_24bit_bitmap(filename):
""" Display small picture on terminal by reducing in to CharPixel """
f = open(filename, "rb")
bmp = BmpReader(f)
for line in range(bmp.height):
bmp.seek_pix((0, line))
print("".join([charpix(*bmp.read_pix()) for col in range(bmp.width)]))
f.close()
def test_header(filename):
f = open(filename, "rb")
bmp = BmpReader(
f,
check=False) # Disable check compatibility. So can display header info
print('Image size (WxH) : %i x %i' % (bmp.width, bmp.height))
print('Startbit @ : %i' % bmp.startbit)
print('Bit Per Pixels : %i' % bmp.bpp)
print('Compression : %i' % bmp.compression)
print('Colors used : %i (for indexed colors)' % bmp.colors_used)
f.close()
def open_image(filename):
""" Helper that detect image type based on file extension. Open the appropriate
image reader (eg: BmpReader) and then the ClipReader over the reader.
a ClipReader on the target image """
reader = None
if '.bmp' in filename:
_f = open(filename, "rb")
from bmp import BmpReader
reader = BmpReader(_f)
if not (reader):
raise Exception('No image reader support available!')
# Encapsulate the reader into the clipper
clip = ClipReader(reader)
return clip
def test_24bit_bitmap(filename):
f = open(filename, "rb")
bmp = BmpReader(f)
print('Image size (WxH) : %i x %i' % (bmp.width, bmp.height))
# Bitmap may have padding bytes in the file, so seek_pix is required before reading each line
print('--- Line 1 ---')
for i in range(bmp.width):
print("%i : %s" % (i, bmp.read_pix()))
print('--- Line 2 ---')
bmp.seek_pix((0, 1)) # x=0, y=1 --> 2th line
for i in range(bmp.width):
print("%i : %s" % (i, bmp.read_pix()))
print('--- Line 6 ---')
# Move file cursor to a given pixel
bmp.seek_pix((0, 5)) # x=0, y=5 --> 6th line
for i in range(bmp.width):
print("%i : %s" % (i, bmp.read_pix()))
f.close()
def test_clip_reading(filename, area1, area2):
""" Perform the reading of a part of the image """
f = open(filename, "rb")
bmp = BmpReader(f)
clip = ClipReader(bmp)
for x, y, w, h in [area1, area2]: # area are tuple of (x,y,w,h)
print("=" * 30)
print(" Area x,y -> w,h = %i,%i -> %i,%i" % (x, y, w, h))
print("=" * 30)
clip.clip(x, y, w, h) # 31,0,6,2 for x,y,width,height
for i in range(clip.height):
print("--- Clipped line %i ---" % i)
for j in range(clip.width):
print("%3i : %s" % (j, clip.read_pix()))
print("")
print("--- show clipping area ---")
# Now integrated to clip.show()
#clip.clip( x,y,w,h ) # 31,0,6,2 for x,y,width,height
#for line in range( h ):
# print( "".join([ charpix( *clip.read_pix() ) for col in range(w) ]) )
clip.show(reseek=True) # Display aread on the console
f.close()
disp.set_origin(
0, 0) # force axis origin @ top-left corner (instead of screen center)
# Convert RGB888 to RGB565
def rgb24_to_rgb16(r, g, b):
""" Convert a RGB888 value to RGB565 """
return (((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3))
# Open the image file
filename = 'mpy.bmp'
print("Open %s" % filename)
f = open(filename, "rb")
# Use the reader to extract the pixel data
bmp = BmpReader(f)
start = time.ticks_ms()
# Transfert the data to memory buffer
for line in range(bmp.height):
bmp.seek_pix((0, line))
for col in range(bmp.width):
disp.pixel((col, line), rgb24_to_rgb16(*bmp.read_pix()))
f.close()
#--- Fill Screen ---
print("Drawing tooks %i ms" % (time.ticks_ms() - start))
print("That's all folks")