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ff00c1d783
Consolidate #ifndef/#ifdef into single #ifdef/#else/#endif block. Add warning comment to generated header about static linkage. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
102 lines
3.9 KiB
Python
102 lines
3.9 KiB
Python
"""
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PlatformIO pre-build script: Convert pyxis-icon.svg to RGB565 PROGMEM header.
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Generates lib/tdeck_ui/Hardware/TDeck/SplashImage.h containing a 320x240
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pixel splash image as a PROGMEM byte array. Skips regeneration if the
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header is already newer than the source SVG.
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Requires: cairosvg, Pillow (gracefully skips if not installed)
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"""
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Import("env")
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import os
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import struct
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SPLASH_WIDTH = 320
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SPLASH_HEIGHT = 240
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SVG_FILE = "pyxis-icon.svg"
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HEADER_FILE = os.path.join("lib", "tdeck_ui", "Hardware", "TDeck", "SplashImage.h")
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BG_COLOR = (0x1D, 0x1A, 0x1E) # #1D1A1E — matches fill_screen in show_splash()
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def rgb888_to_rgb565(r, g, b):
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"""Convert 8-bit RGB to 16-bit RGB565 (big-endian bytes)."""
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rgb565 = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3)
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return struct.pack(">H", rgb565)
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def should_regenerate(svg_path, header_path):
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"""Return True if the header needs regeneration."""
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if not os.path.exists(header_path):
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return True
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return os.path.getmtime(svg_path) > os.path.getmtime(header_path)
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project_dir = env.get("PROJECT_DIR", os.getcwd())
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svg_path = os.path.join(project_dir, SVG_FILE)
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header_path = os.path.join(project_dir, HEADER_FILE)
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if not os.path.exists(svg_path):
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print(f"[generate_splash] {SVG_FILE} not found, skipping splash generation")
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elif not should_regenerate(svg_path, header_path):
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print(f"[generate_splash] {HEADER_FILE} is up-to-date, skipping")
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else:
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try:
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import cairosvg
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from PIL import Image
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import io
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except ImportError as e:
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print(f"[generate_splash] Missing dependency ({e}), skipping splash generation")
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print(f"[generate_splash] Install with: pip install cairosvg Pillow")
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else:
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print(f"[generate_splash] Rendering {SVG_FILE} -> {HEADER_FILE} ({SPLASH_WIDTH}x{SPLASH_HEIGHT} RGB565)")
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# Render SVG to PNG — scale to fit height, center horizontally
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png_data = cairosvg.svg2png(
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url=svg_path,
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output_width=SPLASH_HEIGHT, # Square SVG scaled to screen height
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output_height=SPLASH_HEIGHT,
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)
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icon = Image.open(io.BytesIO(png_data)).convert("RGBA")
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# Composite onto full-screen background (handles transparency)
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bg = Image.new("RGBA", (SPLASH_WIDTH, SPLASH_HEIGHT), BG_COLOR + (255,))
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x_offset = (SPLASH_WIDTH - icon.width) // 2
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bg.paste(icon, (x_offset, 0), icon)
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img = bg.convert("RGB")
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# Convert to RGB565 big-endian byte array
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pixels = list(img.getdata())
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rgb565_bytes = bytearray()
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for r, g, b in pixels:
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rgb565_bytes.extend(rgb888_to_rgb565(r, g, b))
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# Write C header
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os.makedirs(os.path.dirname(header_path), exist_ok=True)
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with open(header_path, "w") as f:
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f.write("// AUTO-GENERATED by generate_splash.py — do not edit\n")
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f.write("#ifndef SPLASH_IMAGE_H\n")
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f.write("#define SPLASH_IMAGE_H\n\n")
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f.write("#include <Arduino.h>\n\n")
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f.write(f"#define SPLASH_WIDTH {SPLASH_WIDTH}\n")
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f.write(f"#define SPLASH_HEIGHT {SPLASH_HEIGHT}\n")
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f.write(f"#define HAS_SPLASH_IMAGE 1\n\n")
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f.write(f"// {SPLASH_WIDTH}x{SPLASH_HEIGHT} RGB565 big-endian ({len(rgb565_bytes)} bytes)\n")
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f.write("// WARNING: static linkage — include from exactly ONE translation unit\n")
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f.write("static const uint8_t PROGMEM splash_image[] = {\n")
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# Write bytes, 16 per line
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for i in range(0, len(rgb565_bytes), 16):
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chunk = rgb565_bytes[i:i+16]
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hex_str = ", ".join(f"0x{b:02X}" for b in chunk)
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trailing = "," if i + 16 < len(rgb565_bytes) else ""
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f.write(f" {hex_str}{trailing}\n")
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f.write("};\n\n")
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f.write("#endif // SPLASH_IMAGE_H\n")
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print(f"[generate_splash] Generated {len(rgb565_bytes)} bytes ({SPLASH_WIDTH}x{SPLASH_HEIGHT} RGB565)")
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