45e9809aff7304721fddb95654901b32195c9c7avboxsync * Copyright © 2000 SuSE, Inc.
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Permission to use, copy, modify, distribute, and sell this software and its
45e9809aff7304721fddb95654901b32195c9c7avboxsync * documentation for any purpose is hereby granted without fee, provided that
45e9809aff7304721fddb95654901b32195c9c7avboxsync * the above copyright notice appear in all copies and that both that
45e9809aff7304721fddb95654901b32195c9c7avboxsync * copyright notice and this permission notice appear in supporting
45e9809aff7304721fddb95654901b32195c9c7avboxsync * documentation, and that the name of SuSE not be used in advertising or
45e9809aff7304721fddb95654901b32195c9c7avboxsync * publicity pertaining to distribution of the software without specific,
45e9809aff7304721fddb95654901b32195c9c7avboxsync * written prior permission. SuSE makes no representations about the
45e9809aff7304721fddb95654901b32195c9c7avboxsync * suitability of this software for any purpose. It is provided "as is"
45e9809aff7304721fddb95654901b32195c9c7avboxsync * without express or implied warranty.
45e9809aff7304721fddb95654901b32195c9c7avboxsync * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
45e9809aff7304721fddb95654901b32195c9c7avboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
45e9809aff7304721fddb95654901b32195c9c7avboxsync * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
45e9809aff7304721fddb95654901b32195c9c7avboxsync * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
45e9809aff7304721fddb95654901b32195c9c7avboxsync * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
45e9809aff7304721fddb95654901b32195c9c7avboxsync * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Author: Keith Packard, SuSE, Inc.
45e9809aff7304721fddb95654901b32195c9c7avboxsync * While the protocol is generous in format support, the
45e9809aff7304721fddb95654901b32195c9c7avboxsync * sample implementation allows only packed RGB and GBR
45e9809aff7304721fddb95654901b32195c9c7avboxsync * representations for data to simplify software rendering,
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define PICT_FORMAT(bpp,type,a,r,g,b) PIXMAN_FORMAT(bpp, type, a, r, g, b)
45e9809aff7304721fddb95654901b32195c9c7avboxsync * gray/color formats use a visual index instead of argb
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define PICT_VISFORMAT(bpp,type,vi) (((bpp) << 24) | \
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 32bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 24bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 16bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 8bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 4bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* 1bpp formats */
45e9809aff7304721fddb95654901b32195c9c7avboxsync * For dynamic indexed visuals (GrayScale and PseudoColor), these control the
45e9809aff7304721fddb95654901b32195c9c7avboxsync * selection of colors allocated for drawing to Pictures. The default
45e9809aff7304721fddb95654901b32195c9c7avboxsync * policy depends on the size of the colormap:
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Size Default Policy
45e9809aff7304721fddb95654901b32195c9c7avboxsync * ----------------------------
45e9809aff7304721fddb95654901b32195c9c7avboxsync * < 64 PolicyMono
45e9809aff7304721fddb95654901b32195c9c7avboxsync * < 256 PolicyGray
45e9809aff7304721fddb95654901b32195c9c7avboxsync * 256 PolicyColor (only on PseudoColor)
45e9809aff7304721fddb95654901b32195c9c7avboxsync * The actual allocation code lives in miindex.c, and so is
45e9809aff7304721fddb95654901b32195c9c7avboxsync * austensibly server dependent, but that code does:
45e9809aff7304721fddb95654901b32195c9c7avboxsync * PolicyMono Allocate no additional colors, use black and white
45e9809aff7304721fddb95654901b32195c9c7avboxsync * PolicyGray Allocate 13 gray levels (11 cells used)
45e9809aff7304721fddb95654901b32195c9c7avboxsync * PolicyColor Allocate a 4x4x4 cube and 13 gray levels (71 cells used)
45e9809aff7304721fddb95654901b32195c9c7avboxsync * PolicyAll Allocate as big a cube as possible, fill with gray (all)
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Here's a picture to help understand how many colors are
45e9809aff7304721fddb95654901b32195c9c7avboxsync * actually allocated (this is just the gray ramp):
45e9809aff7304721fddb95654901b32195c9c7avboxsync * gray level
45e9809aff7304721fddb95654901b32195c9c7avboxsync * all 0000 1555 2aaa 4000 5555 6aaa 8000 9555 aaaa bfff d555 eaaa ffff
45e9809aff7304721fddb95654901b32195c9c7avboxsync * b/w 0000 ffff
45e9809aff7304721fddb95654901b32195c9c7avboxsync * 4x4x4 5555 aaaa
45e9809aff7304721fddb95654901b32195c9c7avboxsync * extra 1555 2aaa 4000 6aaa 8000 9555 bfff d555 eaaa
45e9809aff7304721fddb95654901b32195c9c7avboxsync * The default colormap supplies two gray levels (black/white), the
45e9809aff7304721fddb95654901b32195c9c7avboxsync * 4x4x4 cube allocates another two and nine more are allocated to fill
45e9809aff7304721fddb95654901b32195c9c7avboxsync * in the 13 levels. When the 4x4x4 cube is not allocated, a total of
45e9809aff7304721fddb95654901b32195c9c7avboxsync * 11 cells are allocated.
45e9809aff7304721fddb95654901b32195c9c7avboxsyncextern _X_EXPORT int PictureParseCmapPolicy (const char *name);
45e9809aff7304721fddb95654901b32195c9c7avboxsyncextern _X_EXPORT DevPrivateKey RenderClientPrivateKey;
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* Fixed point updates from Carl Worth, USC, Information Sciences Institute */
45e9809aff7304721fddb95654901b32195c9c7avboxsync * An unadorned "xFixed" is the same as xFixed_16_16,
45e9809aff7304721fddb95654901b32195c9c7avboxsync * (since it's quite common in the code)
45e9809aff7304721fddb95654901b32195c9c7avboxsync/* whether 't' is a well defined not obviously empty trapezoid */
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define xTrapezoidValid(t) ((t)->left.p1.y != (t)->left.p2.y && \
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Standard NTSC luminance conversions:
45e9809aff7304721fddb95654901b32195c9c7avboxsync * y = r * 0.299 + g * 0.587 + b * 0.114
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Approximate this for a bit more speed:
45e9809aff7304721fddb95654901b32195c9c7avboxsync * y = (r * 153 + g * 301 + b * 58) / 512
45e9809aff7304721fddb95654901b32195c9c7avboxsync * This gives 17 bits of luminance; to get 15 bits, lop the low two
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define CvtR8G8B8toY15(s) (((((s) >> 16) & 0xff) * 153 + \
45e9809aff7304721fddb95654901b32195c9c7avboxsync#endif /* _PICTURE_H_ */