gdk-pixbuf-xlib-drawable.c

linux下电话本所依赖的一些图形库

		/* check for last remaining pixel */
		if (width & 1) {
			register guint16 data;
#ifdef LITTLE
			data = *((short *) s);
			data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
#else
			data = *((short *) s);
#endif
			((char *) o)[0] = ((data >> 8) & 0xf8) | ((data >> 13) & 0x7);
			((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3);
			((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7);
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 16 bits/pixel data
  with alpha
  data in lsb format
*/
static void
rgb565alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint16 *s;	/* read 1 pixels at once */
#else
	register guint8 *s;
#endif
	register guint32 *o;

	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = (guint16 *) srow;
#else
		s = (guint8 *) srow;
#endif
		o = (guint32 *) orow;
		for (xx = 0; xx < width; xx ++) {
			register guint32 data;
			/*  rrrrrggg gggbbbbb -> rrrrrRRR ggggggGG bbbbbBBB aaaaaaaa */
			/*  little endian: aaaaaaaa bbbbbBBB ggggggGG rrrrrRRR */
#ifdef LITTLE
			data = *s++;
			*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
				| (data & 0x7e0) << 5 | (data & 0x600) >> 1
				| (data & 0x1f) << 19 | (data & 0x1c) << 14
				| 0xff000000;
#else
			/* swap endianness first */
			data = s[0] | s[1] << 8;
			s += 2;
			*o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
				| (data & 0x7e0) << 13 | (data & 0x600) << 7
				| (data & 0x1f) << 11 | (data & 0x1c) << 6
				| 0xff;
#endif
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 16 bits/pixel data
  with alpha
  data in msb format
*/
static void
rgb565amsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint8 *s;
#else
	register guint16 *s;	/* read 1 pixels at once */
#endif
	register guint32 *o;

	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = srow;
#else
		s = (guint16 *) srow;
#endif
		o = (guint32 *) orow;
		for (xx = 0; xx < width; xx ++) {
			register guint32 data;
			/*  rrrrrggg gggbbbbb -> rrrrrRRR gggggg00 bbbbbBBB aaaaaaaa */
			/*  little endian: aaaaaaaa bbbbbBBB gggggg00 rrrrrRRR */
#ifdef LITTLE
			/* swap endianness first */
			data = s[0] | s[1] << 8;
			s += 2;
			*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
				| (data & 0x7e0) << 5 | (data & 0x600) >> 1
				| (data & 0x1f) << 19 | (data & 0x1c) << 14
				| 0xff000000;
#else
			data = *s++;
			*o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
				| (data & 0x7e0) << 13 | (data & 0x600) << 7
				| (data & 0x1f) << 11 | (data & 0x1c) << 6
				| 0xff;
#endif
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 15 bits/pixel data
  no alpha
  data in lsb format
*/
static void
rgb555lsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint32 *s;	/* read 2 pixels at once */
#else
	register guint8 *s;	/* read 2 pixels at once */
#endif
	register guint16 *o;
	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = (guint32 *) srow;
#else
		s = srow;
#endif
		o = (guint16 *) orow;
		for (xx = 1; xx < width; xx += 2) {
			register guint32 data;
#ifdef LITTLE
			data = *s++;
			*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
				| (data & 0x3e0) << 6 | (data & 0x380) << 1;
			*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
				| (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20;
			*o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23
				| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
#else
			/* swap endianness first */
			data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
			s += 4;
			*o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4
				| (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
			*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
				| (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28;
			*o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15
				| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
#endif
		}
		/* check for last remaining pixel */
		if (width & 1) {
			register guint16 data;
#ifdef LITTLE
			data = *((short *) s);
#else
			data = *((short *) s);
			data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
#endif
			((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12;
			((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
			((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2;
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 15 bits/pixel data
  no alpha
  data in msb format
*/
static void
rgb555msb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint8 *s;	/* read 2 pixels at once */
#else
	register guint32 *s;	/* read 2 pixels at once */
#endif
	register guint16 *o;
	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = srow;
#else
		s = (guint32 *) srow;
#endif
		o = (guint16 *) orow;
		for (xx = 1; xx < width; xx += 2) {
			register guint32 data;
#ifdef LITTLE
			/* swap endianness first */
			data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
			s += 4;
			*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
				| (data & 0x3e0) << 6 | (data & 0x380) << 1;
			*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
				| (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20;
			*o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23
				| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
#else
			data = *s++;
			*o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4
				| (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
			*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
				| (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28;
			*o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15
				| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
#endif
		}
		/* check for last remaining pixel */
		if (width & 1) {
			register guint16 data;
#ifdef LITTLE
			data = *((short *) s);
			data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
#else
			data = *((short *) s);
#endif
			((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12;
			((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
			((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2;
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 15 bits/pixel data
  with alpha
  data in lsb format
*/
static void
rgb555alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint16 *s;	/* read 1 pixels at once */
#else
	register guint8 *s;
#endif
	register guint32 *o;

	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = (guint16 *) srow;
#else
		s = srow;
#endif
		o = (guint32 *) orow;
		for (xx = 0; xx < width; xx++) {
			register guint32 data;
			/*  rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
			/*  little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
#ifdef LITTLE
			data = *s++;
			*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
				| (data & 0x3e0) << 6 | (data & 0x380) << 1
				| (data & 0x1f) << 19 | (data & 0x1c) << 14
				| 0xff000000;
#else
			/* swap endianness first */
			data = s[0] | s[1] << 8;
			s += 2;
			*o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12
				| (data & 0x3e0) << 14 | (data & 0x380) << 9
				| (data & 0x1f) << 11 | (data & 0x1c) << 6
				| 0xff;
#endif
		}
		srow += bpl;
		orow += rowstride;
	}
}

/*
  convert 15 bits/pixel data
  with alpha
  data in msb format
*/
static void
rgb555amsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

#ifdef LITTLE
	register guint16 *s;	/* read 1 pixels at once */
#else
	register guint8 *s;
#endif
	register guint32 *o;

	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
		s = (guint16 *) srow;
#else
		s = srow;
#endif
		o = (guint32 *) orow;
		for (xx = 0; xx < width; xx++) {
			register guint32 data;
			/*  rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
			/*  little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
#ifdef LITTLE
			/* swap endianness first */
			data = s[0] | s[1] << 8;
			s += 2;
			*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
				| (data & 0x3e0) << 6 | (data & 0x380) << 1
				| (data & 0x1f) << 19 | (data & 0x1c) << 14
				| 0xff000000;
#else
			data = *s++;
			*o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12
				| (data & 0x3e0) << 14 | (data & 0x380) << 9
				| (data & 0x1f) << 11 | (data & 0x1c) << 6
				| 0xff;
#endif
		}
		srow += bpl;
		orow += rowstride;
	}
}


static void
rgb888alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

	guint8 *s;	/* for byte order swapping */
	guint8 *o;
	guint8 *srow = image->data, *orow = pixels;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	d (printf ("32 bits/pixel with alpha\n"));

	/* lsb data */
	for (yy = 0; yy < height; yy++) {
		s = srow;
		o = orow;
		for (xx = 0; xx < width; xx++) {
			*o++ = s[2];
			*o++ = s[1];
			*o++ = s[0];
			*o++ = 0xff;
			s += 4;
		}
		srow += bpl;
		orow += rowstride;
	}
}

static void
rgb888lsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
{
	int xx, yy;
	int width, height;
	int bpl;

	guint8 *srow = image->data, *orow = pixels;
	guint8 *o, *s;

	width = image->width;
	height = image->height;
	bpl = image->bytes_per_line;

	d (printf ("32 bit, lsb, no alpha\n"));

	for (yy = 0; yy < height; yy++) {
		s = srow;
		o = orow;
		for (xx = 0; xx < width; xx++) {
			*o++ = s[2];
			*o++ = s[1];
			*o++ = s[0];
			s += 4;
		}
		srow += bpl;