/usr/include/xcb/xcb_pixel.h is in libxcb-image0-dev 0.4.0-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | #ifndef __XCB_PIXEL_H__
#define __XCB_PIXEL_H__
/* Copyright (C) 2007 Bart Massey
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include <inttypes.h>
#include <X11/Xfuncproto.h>
#ifndef BUILD
#include <xcb/xcb_bitops.h>
#include <xcb/xcb_image.h>
#endif
/**
* XCB Image fast pixel ops.
*
* Fast inline versions of xcb_image_get_pixel() and
* xcb_image_put_pixel() for various common cases.
* The naming convention is xcb_image_put_pixel_FUB()
* where F is the format and is either XY for bitmaps
* or Z for pixmaps, U is the bitmap unit size or pixmap
* bits-per-pixel, and B is the endianness (if needed)
* and is either M for most-significant-first or L for
* least-significant-first. Note that no checking
* is done on the arguments to these routines---caller beware.
* Also note that the pixel type is chosen to be appropriate
* to the unit; bitmaps use int and pixmaps use the appropriate
* size of unsigned.
* @ingroup xcb__image_t
*/
_X_INLINE static void
xcb_image_put_pixel_XY32M (xcb_image_t *image,
uint32_t x,
uint32_t y,
int pixel)
{
uint32_t unit = (x >> 3) & ~xcb_mask(2);
uint32_t byte = xcb_mask(2) - ((x >> 3) & xcb_mask(2));
uint32_t bit = xcb_mask(3) - (x & xcb_mask(3));
uint8_t m = 1 << bit;
uint8_t p = pixel << bit;
uint8_t * bp = image->data + (y * image->stride) + (unit | byte);
*bp = (*bp & ~m) | p;
}
_X_INLINE static void
xcb_image_put_pixel_XY32L (xcb_image_t *image,
uint32_t x,
uint32_t y,
int pixel)
{
uint32_t bit = x & xcb_mask(3);
uint8_t m = 1 << bit;
uint8_t p = pixel << bit;
uint8_t * bp = image->data + (y * image->stride) + (x >> 3);
*bp = (*bp & ~m) | p;
}
_X_INLINE static int
xcb_image_get_pixel_XY32M (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint32_t unit = (x >> 3) & ~xcb_mask(2);
uint32_t byte = xcb_mask(2) - ((x >> 3) & xcb_mask(2));
uint32_t bit = xcb_mask(3) - (x & xcb_mask(3));
uint8_t * bp = image->data + (y * image->stride) + (unit | byte);
return (*bp >> bit) & 1;
}
_X_INLINE static int
xcb_image_get_pixel_XY32L (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint32_t bit = x & xcb_mask(3);
uint8_t * bp = image->data + (y * image->stride) + (x >> 3);
return (*bp >> bit) & 1;
}
_X_INLINE static void
xcb_image_put_pixel_Z8 (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint8_t pixel)
{
image->data[x + y * image->stride] = pixel;
}
_X_INLINE static uint8_t
xcb_image_get_pixel_Z8 (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
return image->data[x + y * image->stride];
}
_X_INLINE static void
xcb_image_put_pixel_Z32M (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint32_t pixel)
{
uint8_t * row = image->data + (y * image->stride);
row[x << 2] = pixel >> 24;
row[(x << 2) + 1] = pixel >> 16;
row[(x << 2) + 2] = pixel >> 8;
row[(x << 2) + 3] = pixel;
}
_X_INLINE static void
xcb_image_put_pixel_Z32L (xcb_image_t *image,
uint32_t x,
uint32_t y,
uint32_t pixel)
{
uint8_t * row = image->data + (y * image->stride);
row[x << 2] = pixel;
row[(x << 2) + 1] = pixel >> 8;
row[(x << 2) + 2] = pixel >> 16;
row[(x << 2) + 3] = pixel >> 24;
}
_X_INLINE static uint32_t
xcb_image_get_pixel_Z32M (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint8_t * row = image->data + (y * image->stride);
uint32_t pixel = row[x << 2] << 24;
pixel |= row[(x << 2) + 1] << 16;
pixel |= row[(x << 2) + 2] << 8;
return pixel | row[(x << 2) + 3];
}
_X_INLINE static uint32_t
xcb_image_get_pixel_Z32L (xcb_image_t *image,
uint32_t x,
uint32_t y)
{
uint8_t * row = image->data + (y * image->stride);
uint32_t pixel = row[x << 2];
pixel |= row[(x << 2) + 1] << 8;
pixel |= row[(x << 2) + 2] << 16;
return pixel | row[(x << 2) + 3] << 24;
}
#endif /* __XCB_PIXEL_H__ */
|