picture.h revision 040abec2534dadc53ebc8fa378ef03f4feecb7db
/*
*
* 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 <pixman.h>
typedef struct _DirectFormat *DirectFormatPtr;
typedef struct _PictFormat *PictFormatPtr;
typedef struct _Picture *PicturePtr;
/*
* 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)))
#define PICT_FORMAT_BPP(f) PIXMAN_FORMAT_BPP(f)
#define PICT_FORMAT_TYPE(f) PIXMAN_FORMAT_TYPE(f)
#define PICT_FORMAT_A(f) PIXMAN_FORMAT_A(f)
#define PICT_FORMAT_R(f) PIXMAN_FORMAT_R(f)
#define PICT_FORMAT_G(f) PIXMAN_FORMAT_G(f)
#define PICT_FORMAT_B(f) PIXMAN_FORMAT_B(f)
#define PICT_FORMAT_RGB(f) PIXMAN_FORMAT_RGB(f)
#define PICT_FORMAT_VIS(f) PIXMAN_FORMAT_VIS(f)
#define PICT_TYPE_OTHER PIXMAN_TYPE_OTHER
#define PICT_TYPE_A PIXMAN_TYPE_A
#define PICT_TYPE_ARGB PIXMAN_TYPE_ARGB
#define PICT_TYPE_ABGR PIXMAN_TYPE_ABGR
#define PICT_TYPE_COLOR PIXMAN_TYPE_COLOR
#define PICT_TYPE_GRAY PIXMAN_TYPE_GRAY
#define PICT_FORMAT_COLOR(f) PIXMAN_FORMAT_COLOR(f)
/* 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 PictureCmapPolicyInvalid -1
#define PictureCmapPolicyDefault 0
#define PictureCmapPolicyMono 1
#define PictureCmapPolicyGray 2
#define PictureCmapPolicyColor 3
#define PictureCmapPolicyAll 4
extern int PictureCmapPolicy;
int PictureParseCmapPolicy (const char *name);
extern int RenderErrBase;
extern DevPrivateKey RenderClientPrivateKey;
/* Fixed point updates from Carl Worth, USC, Information Sciences Institute */
typedef pixman_fixed_32_32_t xFixed_32_32;
typedef pixman_fixed_48_16_t xFixed_48_16;
typedef pixman_fixed_1_31_t xFixed_1_31;
typedef pixman_fixed_1_16_t xFixed_1_16;
typedef pixman_fixed_16_16_t xFixed_16_16;
/*
* An unadorned "xFixed" is the same as xFixed_16_16,
* (since it's quite common in the code)
*/
typedef pixman_fixed_t xFixed;
#define XFIXED_BITS 16
#define xFixedToInt(f) pixman_fixed_to_int(f)
#define IntToxFixed(i) pixman_int_to_fixed(i)
#define xFixedE pixman_fixed_e
#define xFixed1 pixman_fixed_1
#define xFixed1MinusE pixman_fixed_1_minus_e
#define xFixedFrac(f) pixman_fixed_frac(f)
#define xFixedFloor(f) pixman_fixed_floor(f)
#define xFixedCeil(f) pixman_fixed_ceil(f)
#define xFixedFraction(f) pixman_fixed_fraction(f)
#define xFixedMod2(f) pixman_fixed_mod2(f)
/* 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_ */