cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Copyright © 2000 SuSE, Inc.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Permission to use, copy, modify, distribute, and sell this software and its
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * documentation for any purpose is hereby granted without fee, provided that
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * the above copyright notice appear in all copies and that both that
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * copyright notice and this permission notice appear in supporting
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * documentation, and that the name of SuSE not be used in advertising or
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * publicity pertaining to distribution of the software without specific,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * written prior permission. SuSE makes no representations about the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * suitability of this software for any purpose. It is provided "as is"
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * without express or implied warranty.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Author: Keith Packard, SuSE, Inc.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * While the protocol is generous in format support, the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * sample implementation allows only packed RGB and GBR
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * representations for data to simplify software rendering,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define PICT_FORMAT(bpp,type,a,r,g,b) PIXMAN_FORMAT(bpp, type, a, r, g, b)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * gray/color formats use a visual index instead of argb
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define PICT_VISFORMAT(bpp,type,vi) (((bpp) << 24) | \
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 32bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 24bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 16bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 8bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 4bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* 1bpp formats */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * For dynamic indexed visuals (GrayScale and PseudoColor), these control the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * selection of colors allocated for drawing to Pictures. The default
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * policy depends on the size of the colormap:
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Size Default Policy
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * ----------------------------
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * < 64 PolicyMono
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * < 256 PolicyGray
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * 256 PolicyColor (only on PseudoColor)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The actual allocation code lives in miindex.c, and so is
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * austensibly server dependent, but that code does:
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PolicyMono Allocate no additional colors, use black and white
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PolicyGray Allocate 13 gray levels (11 cells used)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PolicyColor Allocate a 4x4x4 cube and 13 gray levels (71 cells used)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PolicyAll Allocate as big a cube as possible, fill with gray (all)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Here's a picture to help understand how many colors are
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * actually allocated (this is just the gray ramp):
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * gray level
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * all 0000 1555 2aaa 4000 5555 6aaa 8000 9555 aaaa bfff d555 eaaa ffff
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * b/w 0000 ffff
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * 4x4x4 5555 aaaa
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * extra 1555 2aaa 4000 6aaa 8000 9555 bfff d555 eaaa
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The default colormap supplies two gray levels (black/white), the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * 4x4x4 cube allocates another two and nine more are allocated to fill
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * in the 13 levels. When the 4x4x4 cube is not allocated, a total of
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * 11 cells are allocated.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncextern _X_EXPORT int PictureParseCmapPolicy (const char *name);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* Fixed point updates from Carl Worth, USC, Information Sciences Institute */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * An unadorned "xFixed" is the same as xFixed_16_16,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * (since it's quite common in the code)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/* whether 't' is a well defined not obviously empty trapezoid */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define xTrapezoidValid(t) ((t)->left.p1.y != (t)->left.p2.y && \
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Standard NTSC luminance conversions:
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * y = r * 0.299 + g * 0.587 + b * 0.114
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Approximate this for a bit more speed:
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * y = (r * 153 + g * 301 + b * 58) / 512
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * This gives 17 bits of luminance; to get 15 bits, lop the low two
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define CvtR8G8B8toY15(s) (((((s) >> 16) & 0xff) * 153 + \
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#endif /* _PICTURE_H_ */