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