145 lines
4.5 KiB
Python
145 lines
4.5 KiB
Python
import epaper
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import microbmp
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import time
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import random
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import os
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import gc
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gc.enable()
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epd_resolution = [600, 448]
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epd_colormap = [
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[0x00, 0x00, 0x00], # black
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[0xff, 0xff, 0xff], # white
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[0x00, 0x90, 0x10], # green
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[0x00, 0x00, 0xee], # blue
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[0xff, 0x00, 0x00], # red
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[0xff, 0xdd, 0x00], # yellow
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[0xff, 0x77, 0x00], # orange
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]
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images = list(filter(lambda x : x.endswith(".bmp"), os.listdir()))
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max_free_height = 200
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def init_display():
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#print("ePaper init ", str(time.localtime()))
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epd = epaper.EPD_5in65()
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epd.fill(epd.White)
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return epd
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def draw_image(filename):
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global epd
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global epd_colormap
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global free_x, free_y, free_width, free_height
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offset_x = 0
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offset_y = 0
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free_x = 0
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free_y = 0
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free_width = 0
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free_height = 0
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color_map = {}
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def header_callback(header):
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#print("header callback: ", str(header))
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global epd_resolution
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global offset_x, offset_y
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global free_x, free_y, free_width, free_height
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global max_free_height
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w = header[0]
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h = header[1]
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rest_x = (epd_resolution[0] - w)
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rest_y = (epd_resolution[1] - h)
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free_x = 0
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free_y = max(h, epd_resolution[1] - max_free_height)
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free_width = epd_resolution[0]
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free_height = min(rest_y, max_free_height)
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offset_x = rest_x//2
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offset_y = max(0, rest_y - max_free_height)//2
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def pixel_callback(x, y, color):
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global epd
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global epd_colormap
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global offset_x, offset_y
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# translate color to color index
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color_index = 0
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color_key = color[0] + color[1] << 8 + color[2] << 16
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if color_key in color_map:
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color_index = color_map[color_key]
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else:
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# search for the best color
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best_index = 0
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best_score = 1000
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for index in range(len(epd_colormap)):
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c1 = epd_colormap[index]
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c2 = color
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score = abs(c1[0] - c2[0]) + abs(c1[1] - c2[1]) + abs(c1[2] - c2[2])
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if score < best_score:
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best_score = score
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best_index = index
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if score < 10:
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break
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color_index = best_index
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color_map[color_key] = color_index
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epd.pixel(offset_x + x, offset_y + y, color_index)
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def pixel_row_callback(x, y, colors):
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pass
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#global epd
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#print("PXL ", str([color, r,g,b, pixel]))
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#for i in range(len(colors)):
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# epd.pixel(offset_x + x + i, offset_y + y, color_to_index(colors[i]))
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#print(str(time.localtime()), " BMP ", filename, " loading")
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time_start = time.ticks_ms()
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epd.fill(epd.White)
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microbmp.MicroBMP(header_callback=header_callback, data_callback=pixel_callback).load(filename)
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time_loaded = time.ticks_ms()
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print(" time to load: ", (time_loaded - time_start) / 1000, " s")
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#print(str(time.localtime()), " BMP loaded")
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#epd.EPD_5IN65F_Display(epd.buffer)
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#print(str(time.localtime()), " ePaper printed")
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return [free_x, free_y, free_width, free_height]
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def draw_pattern():
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global epd
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global epd_resolution
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free_x = 0
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free_y = 400
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free_width = epd_resolution[0]
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free_height = epd_resolution[1] - free_y
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epd.fill_rect(0, 0, epd_resolution[0], free_y, random.randrange(2,7))
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return [free_x, free_y, free_width, free_height]
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def print_text(text, region):
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global epd
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epd.text(text, region[0]+5, region[1]+5, epd.Black)
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def draw_extra(region):
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fnt = 8
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if region[2] < fnt or region[3] < fnt:
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print("Not enough space for extra: ", str(region))
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return
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#epd.rect(region[0], region[1], region[2], region[3], epd.Black)
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#region[0] += random.randrange(50)
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print_text("Lorem ipsum: " + str(random.randrange(1000, 999999)), region)
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# MAIN
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epd = init_display()
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while True:
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epd.EPD_5IN65F_Init()
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epd.fill(epd.White)
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filename = random.choice(images)
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print("TV drawing image ", filename)
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free_space = draw_image(filename)
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#free_space = draw_pattern()
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draw_extra(free_space)
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time_render_start = time.ticks_ms()
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epd.EPD_5IN65F_Display(epd.buffer)
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time_render_stop = time.ticks_ms()
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print(" time to render: ", (time_render_stop - time_render_start) / 1000, " s")
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print("TV showing ", filename)
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epd.Sleep()
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print("")
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gc.collect()
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epd.delay_ms(60000 * 1)
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