Module: SDL::Mouse

Defined in:
lib/sdl.rb

Class Method Summary collapse

Class Method Details

.setCursor(bitmap, white, black, transparent, inverted, hot_x = 0, hot_y = 0) ⇒ Object Also known as: set_cursor 



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# File 'lib/sdl.rb', line 75

def setCursor(bitmap,white,black,transparent,inverted,hot_x=0,hot_y=0)
  if bitmap.w % 8 != 0 then
	raise SDL::Error,"width of cursor must be muliple of 8"
  end

  white=SDL.color2int(white,bitmap.format)
  black=SDL.color2int(black,bitmap.format)
  transparent=SDL.color2int(transparent,bitmap.format)
  inverted=SDL.color2int(inverted,bitmap.format)
  
  data=[]
  mask=[]

  i=-1
  for y in 0..(bitmap.h-1)
	for x in 0..(bitmap.w-1)
	  if x%8 == 0 then
        i+=1
 data[i]=mask[i]=0
      else
 data[i] <<= 1
 mask[i] <<= 1
	  end

	  case bitmap.getPixel(x,y)
	  when white
 mask[i] |= 0x01
	  when black
 data[i] |= 0x01
 mask[i] |= 0x01
	  when transparent
 # do nothing 
	  when inverted
 data[i] |= 0x01
	  end
	end
  end

  setCursor_imp data.pack('C*'),mask.pack('C*'),bitmap.w,bitmap.h,hot_x,hot_y
end