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156 lines
3.7 KiB
Python
156 lines
3.7 KiB
Python
# Python tool to convert an image to C array for small3dlib.
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#
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# by drummyfish
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# released under CC0 1.0.
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import sys
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from PIL import Image
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def printHelp():
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print("Convert image to C array for small3dlib.")
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print("usage:\n")
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print(" python img2array.py [-xW -yH -h -nS -pT -5] file\n")
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print(" -xW set width of the output to W pixels")
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print(" -yH set height of the output to H pixels")
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print(" -h include header guards (for texture per file)")
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print(" -nS use the name S for the texture (defaut: \"texture\")")
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print(" -pT use palette from file T and indexed colors (otherwise direct colors)")
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print(" -5 use 565 format instead of RGB8")
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print("");
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print("by Miloslav \"drummyfish\" Ciz")
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print("released under CC0 1.0")
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def rgbTo565(rgb):
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return ((rgb[0] >> 3) << 11) | ((rgb[1] >> 2) << 5) | ((rgb[2] >> 3))
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if len(sys.argv) < 2:
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printHelp()
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quit()
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FILENAME = ""
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PALETTE = ""
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USE_PALETTE = False
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NAME = "texture"
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GUARDS = False
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OUT_WIDTH = 64
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OUT_HEIGHT = 64
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USE_565 = False
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for s in sys.argv:
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if s [:2] == "-x":
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OUT_WIDTH = int(s[2:])
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elif s [:2] == "-y":
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OUT_HEIGHT = int(s[2:])
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elif s == "-h":
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GUARDS = True
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elif s[:2] == "-n":
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NAME = s[2:]
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elif s[:2] == "-5":
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USE_565 = True
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elif s[:2] == "-p":
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PALETTE = s[2:]
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USE_PALETTE = True
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else:
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FILENAME = s
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imageArray = []
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paletteColors = []
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paletteArray = []
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image = Image.open(FILENAME).convert("RGB")
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pixels = image.load()
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if USE_PALETTE > 0:
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palette = Image.open(PALETTE).convert("RGB")
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pixelsPal = palette.load()
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for y in range(palette.size[1]):
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for x in range(palette.size[0]):
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c = pixelsPal[x,y]
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paletteColors.append(c)
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if USE_565:
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paletteArray.append(rgbTo565(c))
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else:
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paletteArray.append(c[0])
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paletteArray.append(c[1])
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paletteArray.append(c[2])
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image2 = Image.new("RGB",(OUT_WIDTH,OUT_HEIGHT),color="white")
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pixels2 = image2.load()
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for y in range(OUT_HEIGHT):
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for x in range(OUT_WIDTH):
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coord = (
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int(x / float(OUT_WIDTH) * image.size[0]),
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int(y / float(OUT_HEIGHT) * image.size[1]))
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pixel = pixels[coord]
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if USE_PALETTE:
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closestIndex = 0
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closestDiff = 1024
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# find the index of the closest color:
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for i in range(len(paletteColors)):
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c = paletteColors[i]
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diff = abs(pixel[0] - c[0]) + abs(pixel[1] - c[1]) + abs(pixel[2] - c[2])
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if diff < closestDiff:
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closestIndex = i
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closestDiff = diff
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imageArray.append(closestIndex)
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pixels2[x,y] = paletteColors[closestIndex]
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else:
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if USE_565:
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imageArray.append(rgbTo565(pixel))
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else:
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imageArray.append(pixel[0])
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imageArray.append(pixel[1])
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imageArray.append(pixel[2])
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pixels2[x,y] = pixel
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#-----------------------
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def printArray(array, name, sizeString, dataType="const uint8_t"):
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print(dataType + " " + name + "[" + sizeString + "] = {")
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arrayString = ""
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lineLen = 0
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for v in array:
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item = str(v) + ","
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lineLen += len(item)
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if lineLen > 80:
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arrayString += "\n"
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lineLen = len(item)
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arrayString += item
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print(arrayString[:-1])
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print("}; // " + name)
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if GUARDS:
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print("#ifndef " + NAME.upper() + "_TEXTURE_H")
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print("#define " + NAME.upper() + "_TEXTURE_H\n")
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if USE_PALETTE:
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printArray(paletteArray,NAME + "Palette",str(len(paletteArray)),"const uint16_t" if USE_565 else "const uint8_t")
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print("")
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print("#define " + NAME.upper() + "_TEXTURE_WIDTH " + str(OUT_WIDTH))
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print("#define " + NAME.upper() + "_TEXTURE_HEIGHT " + str(OUT_HEIGHT))
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print("")
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printArray(imageArray,NAME + "Texture",str(len(imageArray)))
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if GUARDS:
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print("\n#endif // guard")
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image2.save(NAME + "_preview.png")
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