bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
{
	uint8 *end = input + size;
	uint8 *prevline = NULL, *line = NULL;
	int opcode, count, offset, isfillormix, x = width;
	int lastopcode = -1, insertmix = False, bicolour = False;
	uint8 code;
	uint8 colour1 = 0, colour2 = 0;
	uint8 mixmask, mask = 0;
	uint8 mix = 0xff;
	int fom_mask = 0;

	while (input < end)
	{
		fom_mask = 0;
		code = CVAL(input);
		opcode = code >> 4;
		/* Handle different opcode forms */
		switch (opcode)
		{
			case 0xc:
			case 0xd:
			case 0xe:
				opcode -= 6;
				count = code & 0xf;
				offset = 16;
				break;
			case 0xf:
				opcode = code & 0xf;
				if (opcode < 9)
				{
					count = CVAL(input);
					count |= CVAL(input) << 8;
				}
				else
				{
					count = (opcode < 0xb) ? 8 : 1;
				}
				offset = 0;
				break;
			default:
				opcode >>= 1;
				count = code & 0x1f;
				offset = 32;
				break;
		}
		/* Handle strange cases for counts */
		if (offset != 0)
		{
			isfillormix = ((opcode == 2) || (opcode == 7));
			if (count == 0)
			{
				if (isfillormix)
					count = CVAL(input) + 1;
				else
					count = CVAL(input) + offset;
			}
			else if (isfillormix)
			{
				count <<= 3;
			}
		}
		/* Read preliminary data */
		switch (opcode)
		{
			case 0:	/* Fill */
				if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
					insertmix = True;
				break;
			case 8:	/* Bicolour */
				colour1 = CVAL(input);
				colour2 = CVAL(input);
				break;
			case 3:	/* Colour */
				colour2 = CVAL(input);
				break;
			case 6:	/* SetMix/Mix */
			case 7:	/* SetMix/FillOrMix */
				mix = CVAL(input);
				opcode -= 5;
				break;
			case 9:	/* FillOrMix_1 */
				mask = 0x03;
				opcode = 0x02;
				fom_mask = 3;
				break;
			case 0x0a:	/* FillOrMix_2 */
				mask = 0x05;
				opcode = 0x02;
				fom_mask = 5;
				break;
		}
		lastopcode = opcode;
		mixmask = 0;
		/* Output body */
		while (count > 0)
		{
			if (x >= width)
			{
				if (height <= 0)
					return False;
				x = 0;
				height--;
				prevline = line;
				line = output + height * width;
			}
			switch (opcode)
			{
				case 0:	/* Fill */
					if (insertmix)
					{
						if (prevline == NULL)
							line[x] = mix;
						else
							line[x] = prevline[x] ^ mix;
						insertmix = False;
						count--;
						x++;
					}
					if (prevline == NULL)
					{
						REPEAT(line[x] = 0)
					}
					else
					{
						REPEAT(line[x] = prevline[x])
					}
					break;
				case 1:	/* Mix */
					if (prevline == NULL)
					{
						REPEAT(line[x] = mix)
					}
					else
					{
						REPEAT(line[x] = prevline[x] ^ mix)
					}
					break;
				case 2:	/* Fill or Mix */
					if (prevline == NULL)
					{
						REPEAT
						(
							MASK_UPDATE();
							if (mask & mixmask)
								line[x] = mix;
							else
								line[x] = 0;
						)
					}
					else
					{
						REPEAT
						(
							MASK_UPDATE();
							if (mask & mixmask)
								line[x] = prevline[x] ^ mix;
							else
								line[x] = prevline[x];
						)
					}
					break;
				case 3:	/* Colour */
					REPEAT(line[x] = colour2)
					break;
				case 4:	/* Copy */
					REPEAT(line[x] = CVAL(input))
					break;
				case 8:	/* Bicolour */
					REPEAT
					(
						if (bicolour)
						{
							line[x] = colour2;
							bicolour = False;
						}
						else
						{
							line[x] = colour1;
							bicolour = True; count++;
						}
					)
					break;
				case 0xd:	/* White */
					REPEAT(line[x] = 0xff)
					break;
				case 0xe:	/* Black */
					REPEAT(line[x] = 0)
					break;
				default:
					logger(Core, Warning, "bitmap_decompress(), unhandled bitmap opcode 0x%x", opcode);
					return False;
			}
		}
	}
	return True;
}