113 lines
3.3 KiB
Python
113 lines
3.3 KiB
Python
import zlib
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import struct
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import math
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def make_png(width, height, draw_func):
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# PNG signature
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png = bytearray(b'\x89PNG\r\n\x1a\n')
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# IHDR chunk
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ihdr_data = struct.pack('!IIBBBBB', width, height, 8, 6, 0, 0, 0)
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ihdr_crc = zlib.crc32(b'IHDR' + ihdr_data)
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png.extend(struct.pack('!I', len(ihdr_data)))
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png.extend(b'IHDR')
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png.extend(ihdr_data)
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png.extend(struct.pack('!I', ihdr_crc))
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# IDAT chunk
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raw_data = bytearray()
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for y in range(height):
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raw_data.append(0) # Filter type 0 (None)
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for x in range(width):
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r, g, b, a = draw_func(x, y, width, height)
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raw_data.extend([r, g, b, a])
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compressed = zlib.compress(raw_data, 9)
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idat_crc = zlib.crc32(b'IDAT' + compressed)
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png.extend(struct.pack('!I', len(compressed)))
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png.extend(b'IDAT')
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png.extend(compressed)
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png.extend(struct.pack('!I', idat_crc))
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# IEND chunk
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iend_crc = zlib.crc32(b'IEND')
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png.extend(struct.pack('!I', 0))
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png.extend(b'IEND')
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png.extend(struct.pack('!I', iend_crc))
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return bytes(png)
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def icon_drawer(x, y, w, h):
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# Orange gradient background (#F97316 to #EA580C)
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t = y / h
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r_bg = int(249 * (1 - t) + 234 * t)
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g_bg = int(115 * (1 - t) + 88 * t)
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b_bg = int(22 * (1 - t) + 12 * t)
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cx, cy = w / 2, h / 2
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dx = x - cx
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dy = y - cy
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dist = math.sqrt(dx*dx + dy*dy)
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# Outer rounded rectangle mask
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corner_radius = w * 0.22
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in_box = True
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if abs(dx) > (w/2 - corner_radius) and abs(dy) > (h/2 - corner_radius):
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cdx = abs(dx) - (w/2 - corner_radius)
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cdy = abs(dy) - (h/2 - corner_radius)
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if cdx*cdx + cdy*cdy > corner_radius*corner_radius:
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in_box = False
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if not in_box:
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return 0, 0, 0, 0
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# Draw White Cap / Rocket 'R' symbol in center
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# Top diamond (Cap)
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cap_y = cy - h * 0.1
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if abs(dy + h*0.08) < h*0.18 and abs(dx) < (h*0.18 - abs(dy + h*0.08))*1.8:
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return 255, 255, 255, 255
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# Cap base pillar
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if abs(dx) < w*0.08 and cy < y < cy + h*0.18:
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return 255, 255, 255, 255
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# Cap tassel line
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if w*0.18 < dx < w*0.25 and cy - h*0.05 < y < cy + h*0.12:
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return 255, 255, 255, 255
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return r_bg, g_bg, b_bg, 255
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def maskable_drawer(x, y, w, h):
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# Full bleed background for maskable icon
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t = y / h
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r_bg = int(249 * (1 - t) + 234 * t)
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g_bg = int(115 * (1 - t) + 88 * t)
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b_bg = int(22 * (1 - t) + 12 * t)
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cx, cy = w / 2, h / 2
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dx = x - cx
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dy = y - cy
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# Draw White Cap in center (slightly scaled inside safe zone)
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if abs(dy + h*0.06) < h*0.14 and abs(dx) < (h*0.14 - abs(dy + h*0.06))*1.6:
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return 255, 255, 255, 255
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if abs(dx) < w*0.06 and cy < y < cy + h*0.14:
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return 255, 255, 255, 255
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return r_bg, g_bg, b_bg, 255
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with open('public/pwa-192x192.png', 'wb') as f:
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f.write(make_png(192, 192, icon_drawer))
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with open('public/pwa-512x512.png', 'wb') as f:
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f.write(make_png(512, 512, icon_drawer))
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with open('public/apple-touch-icon.png', 'wb') as f:
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f.write(make_png(180, 180, icon_drawer))
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with open('public/pwa-maskable-512x512.png', 'wb') as f:
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f.write(make_png(512, 512, maskable_drawer))
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print("PWA icons generated successfully!")
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