The Tor Browser: gfx/cairo/libpixman/src/pixman-access.c@6474c204b198 (annotated)

gfx/cairo/libpixman/src/pixman-access.c@6474c204b198 (annotated)

gfx/cairo/libpixman/src/pixman-access.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  *
  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
  *             2005 Lars Knoll & Zack Rusin, Trolltech
  *             2008 Aaron Plattner, NVIDIA Corporation
  *
  * 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 Keith Packard not be used in
  * advertising or publicity pertaining to distribution of the software without
  * specific, written prior permission.  Keith Packard makes no
  * representations about the suitability of this software for any purpose.  It
  * is provided "as is" without express or implied warranty.
  *
  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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.
  */
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
 #include <math.h>
 #include "pixman-accessor.h"
 #include "pixman-private.h"
 #define CONVERT_RGB24_TO_Y15(s)						\
     (((((s) >> 16) & 0xff) * 153 +					\
       (((s) >>  8) & 0xff) * 301 +					\
       (((s)      ) & 0xff) * 58) >> 2)
 #define CONVERT_RGB24_TO_RGB15(s)                                       \
     ((((s) >> 3) & 0x001f) |                                            \
      (((s) >> 6) & 0x03e0) |                                            \
      (((s) >> 9) & 0x7c00))
 /* Fetch macros */
 #ifdef WORDS_BIGENDIAN
 #define FETCH_1(img,l,o)						\
     (((READ ((img), ((uint32_t *)(l)) + ((o) >> 5))) >> (0x1f - ((o) & 0x1f))) & 0x1)
 #else
 #define FETCH_1(img,l,o)						\
     ((((READ ((img), ((uint32_t *)(l)) + ((o) >> 5))) >> ((o) & 0x1f))) & 0x1)
 #endif
 #define FETCH_8(img,l,o)    (READ (img, (((uint8_t *)(l)) + ((o) >> 3))))
 #ifdef WORDS_BIGENDIAN
 #define FETCH_4(img,l,o)						\
     (((4 * (o)) & 4) ? (FETCH_8 (img,l, 4 * (o)) & 0xf) : (FETCH_8 (img,l,(4 * (o))) >> 4))
 #else
 #define FETCH_4(img,l,o)						\
     (((4 * (o)) & 4) ? (FETCH_8 (img, l, 4 * (o)) >> 4) : (FETCH_8 (img, l, (4 * (o))) & 0xf))
 #endif
 #ifdef WORDS_BIGENDIAN
 #define FETCH_24(img,l,o)                                              \
     ((READ (img, (((uint8_t *)(l)) + ((o) * 3) + 0)) << 16)    |       \
      (READ (img, (((uint8_t *)(l)) + ((o) * 3) + 1)) << 8)     |       \
      (READ (img, (((uint8_t *)(l)) + ((o) * 3) + 2)) << 0))
 #else
 #define FETCH_24(img,l,o)						\
     ((READ (img, (((uint8_t *)(l)) + ((o) * 3) + 0)) << 0)	|	\
      (READ (img, (((uint8_t *)(l)) + ((o) * 3) + 1)) << 8)	|	\
      (READ (img, (((uint8_t *)(l)) + ((o) * 3) + 2)) << 16))
 #endif
 /* Store macros */
 #ifdef WORDS_BIGENDIAN
 #define STORE_1(img,l,o,v)						\
     do									\
     {									\
 	uint32_t  *__d = ((uint32_t *)(l)) + ((o) >> 5);		\
 	uint32_t __m, __v;						\
 									\
 	__m = 1 << (0x1f - ((o) & 0x1f));				\
 	__v = (v)? __m : 0;						\
 									\
 	WRITE((img), __d, (READ((img), __d) & ~__m) | __v);		\
     }									\
     while (0)
 #else
 #define STORE_1(img,l,o,v)						\
     do									\
     {									\
 	uint32_t  *__d = ((uint32_t *)(l)) + ((o) >> 5);		\
 	uint32_t __m, __v;						\
 									\
 	__m = 1 << ((o) & 0x1f);					\
 	__v = (v)? __m : 0;						\
 									\
 	WRITE((img), __d, (READ((img), __d) & ~__m) | __v);		\
     }									\
     while (0)
 #endif
 #define STORE_8(img,l,o,v)  (WRITE (img, (uint8_t *)(l) + ((o) >> 3), (v)))
 #ifdef WORDS_BIGENDIAN
 #define STORE_4(img,l,o,v)						\
     do									\
     {									\
 	int bo = 4 * (o);						\
 	int v4 = (v) & 0x0f;						\
 									\
 	STORE_8 (img, l, bo, (						\
 		     bo & 4 ?						\
 		     (FETCH_8 (img, l, bo) & 0xf0) | (v4) :		\
 		     (FETCH_8 (img, l, bo) & 0x0f) | (v4 << 4)));	\
     } while (0)
 #else
 #define STORE_4(img,l,o,v)						\
     do									\
     {									\
 	int bo = 4 * (o);						\
 	int v4 = (v) & 0x0f;						\
 									\
 	STORE_8 (img, l, bo, (						\
 		     bo & 4 ?						\
 		     (FETCH_8 (img, l, bo) & 0x0f) | (v4 << 4) :	\
 		     (FETCH_8 (img, l, bo) & 0xf0) | (v4)));		\
     } while (0)
 #endif
 #ifdef WORDS_BIGENDIAN
 #define STORE_24(img,l,o,v)                                            \
     do                                                                 \
     {                                                                  \
 	uint8_t *__tmp = (l) + 3 * (o);				       \
         							       \
 	WRITE ((img), __tmp++, ((v) & 0x00ff0000) >> 16);	       \
 	WRITE ((img), __tmp++, ((v) & 0x0000ff00) >>  8);	       \
 	WRITE ((img), __tmp++, ((v) & 0x000000ff) >>  0);	       \
     }                                                                  \
     while (0)
 #else
 #define STORE_24(img,l,o,v)                                            \
     do                                                                 \
     {                                                                  \
 	uint8_t *__tmp = (l) + 3 * (o);				       \
         							       \
 	WRITE ((img), __tmp++, ((v) & 0x000000ff) >>  0);	       \
 	WRITE ((img), __tmp++, ((v) & 0x0000ff00) >>  8);	       \
 	WRITE ((img), __tmp++, ((v) & 0x00ff0000) >> 16);	       \
     }								       \
     while (0)
 #endif
 /*
  * YV12 setup and access macros
  */
 #define YV12_SETUP(image)                                               \
     bits_image_t *__bits_image = (bits_image_t *)image;                 \
     uint32_t *bits = __bits_image->bits;                                \
     int stride = __bits_image->rowstride;                               \
     int offset0 = stride < 0 ?                                          \
     ((-stride) >> 1) * ((__bits_image->height - 1) >> 1) - stride :	\
     stride * __bits_image->height;					\
     int offset1 = stride < 0 ?                                          \
     offset0 + ((-stride) >> 1) * ((__bits_image->height) >> 1) :	\
 	offset0 + (offset0 >> 2)
 /* Note no trailing semicolon on the above macro; if it's there, then
  * the typical usage of YV12_SETUP(image); will have an extra trailing ;
  * that some compilers will interpret as a statement -- and then any further
  * variable declarations will cause an error.
  */
 #define YV12_Y(line)                                                    \
     ((uint8_t *) ((bits) + (stride) * (line)))
 #define YV12_U(line)                                                    \
     ((uint8_t *) ((bits) + offset1 +                                    \
                   ((stride) >> 1) * ((line) >> 1)))
 #define YV12_V(line)                                                    \
     ((uint8_t *) ((bits) + offset0 +                                    \
                   ((stride) >> 1) * ((line) >> 1)))
 /* Misc. helpers */
 static force_inline void
 get_shifts (pixman_format_code_t  format,
 	    int			 *a,
 	    int			 *r,
 	    int                  *g,
 	    int                  *b)
 {
     switch (PIXMAN_FORMAT_TYPE (format))
     {
     case PIXMAN_TYPE_A:
 	*b = 0;
 	*g = 0;
 	*r = 0;
 	*a = 0;
 	break;
     case PIXMAN_TYPE_ARGB:
     case PIXMAN_TYPE_ARGB_SRGB:
 	*b = 0;
 	*g = *b + PIXMAN_FORMAT_B (format);
 	*r = *g + PIXMAN_FORMAT_G (format);
 	*a = *r + PIXMAN_FORMAT_R (format);
 	break;
     case PIXMAN_TYPE_ABGR:
 	*r = 0;
 	*g = *r + PIXMAN_FORMAT_R (format);
 	*b = *g + PIXMAN_FORMAT_G (format);
 	*a = *b + PIXMAN_FORMAT_B (format);
 	break;
     case PIXMAN_TYPE_BGRA:
 	/* With BGRA formats we start counting at the high end of the pixel */
 	*b = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_B (format);
 	*g = *b - PIXMAN_FORMAT_B (format);
 	*r = *g - PIXMAN_FORMAT_G (format);
 	*a = *r - PIXMAN_FORMAT_R (format);
 	break;
     case PIXMAN_TYPE_RGBA:
 	/* With BGRA formats we start counting at the high end of the pixel */
 	*r = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_R (format);
 	*g = *r - PIXMAN_FORMAT_R (format);
 	*b = *g - PIXMAN_FORMAT_G (format);
 	*a = *b - PIXMAN_FORMAT_B (format);
 	break;
     default:
 	assert (0);
 	break;
     }
 }
 static force_inline uint32_t
 convert_channel (uint32_t pixel, uint32_t def_value,
 		 int n_from_bits, int from_shift,
 		 int n_to_bits, int to_shift)
 {
     uint32_t v;
     if (n_from_bits && n_to_bits)
 	v  = unorm_to_unorm (pixel >> from_shift, n_from_bits, n_to_bits);
     else if (n_to_bits)
 	v = def_value;
     else
 	v = 0;
     return (v & ((1 << n_to_bits) - 1)) << to_shift;
 }
 static force_inline uint32_t
 convert_pixel (pixman_format_code_t from, pixman_format_code_t to, uint32_t pixel)
 {
     int a_from_shift, r_from_shift, g_from_shift, b_from_shift;
     int a_to_shift, r_to_shift, g_to_shift, b_to_shift;
     uint32_t a, r, g, b;
     get_shifts (from, &a_from_shift, &r_from_shift, &g_from_shift, &b_from_shift);
     get_shifts (to, &a_to_shift, &r_to_shift, &g_to_shift, &b_to_shift);
     a = convert_channel (pixel, ~0,
 			 PIXMAN_FORMAT_A (from), a_from_shift,
 			 PIXMAN_FORMAT_A (to), a_to_shift);
     r = convert_channel (pixel, 0,
 			 PIXMAN_FORMAT_R (from), r_from_shift,
 			 PIXMAN_FORMAT_R (to), r_to_shift);
     g = convert_channel (pixel, 0,
 			 PIXMAN_FORMAT_G (from), g_from_shift,
 			 PIXMAN_FORMAT_G (to), g_to_shift);
     b = convert_channel (pixel, 0,
 			 PIXMAN_FORMAT_B (from), b_from_shift,
 			 PIXMAN_FORMAT_B (to), b_to_shift);
     return a | r | g | b;
 }
 static force_inline uint32_t
 convert_pixel_to_a8r8g8b8 (pixman_image_t *image,
 			   pixman_format_code_t format,
 			   uint32_t pixel)
 {
     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_GRAY		||
 	PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_COLOR)
     {
 	return image->bits.indexed->rgba[pixel];
     }
     else
     {
 	return convert_pixel (format, PIXMAN_a8r8g8b8, pixel);
     }
 }
 static force_inline uint32_t
 convert_pixel_from_a8r8g8b8 (pixman_image_t *image,
 			     pixman_format_code_t format, uint32_t pixel)
 {
     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_GRAY)
     {
 	pixel = CONVERT_RGB24_TO_Y15 (pixel);
 	return image->bits.indexed->ent[pixel & 0x7fff];
     }
     else if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_COLOR)
     {
 	pixel = convert_pixel (PIXMAN_a8r8g8b8, PIXMAN_x1r5g5b5, pixel);
 	return image->bits.indexed->ent[pixel & 0x7fff];
     }
     else
     {
 	return convert_pixel (PIXMAN_a8r8g8b8, format, pixel);
     }
 }
 static force_inline uint32_t
 fetch_and_convert_pixel (pixman_image_t	*	image,
 			 const uint8_t *	bits,
 			 int			offset,
 			 pixman_format_code_t	format)
 {
     uint32_t pixel;
     switch (PIXMAN_FORMAT_BPP (format))
     {
     case 1:
 	pixel = FETCH_1 (image, bits, offset);
 	break;
     case 4:
 	pixel = FETCH_4 (image, bits, offset);
 	break;
     case 8:
 	pixel = READ (image, bits + offset);
 	break;
     case 16:
 	pixel = READ (image, ((uint16_t *)bits + offset));
 	break;
     case 24:
 	pixel = FETCH_24 (image, bits, offset);
 	break;
     case 32:
 	pixel = READ (image, ((uint32_t *)bits + offset));
 	break;
     default:
 	pixel = 0xffff00ff; /* As ugly as possible to detect the bug */
 	break;
     }
     return convert_pixel_to_a8r8g8b8 (image, format, pixel);
 }
 static force_inline void
 convert_and_store_pixel (bits_image_t *		image,
 			 uint8_t *		dest,
 			 int                    offset,
 			 pixman_format_code_t	format,
 			 uint32_t		pixel)
 {
     uint32_t converted = convert_pixel_from_a8r8g8b8 (
 	(pixman_image_t *)image, format, pixel);
     switch (PIXMAN_FORMAT_BPP (format))
     {
     case 1:
 	STORE_1 (image, dest, offset, converted & 0x01);
 	break;
     case 4:
 	STORE_4 (image, dest, offset, converted & 0xf);
 	break;
     case 8:
 	WRITE (image, (dest + offset), converted & 0xff);
 	break;
     case 16:
 	WRITE (image, ((uint16_t *)dest + offset), converted & 0xffff);
 	break;
     case 24:
 	STORE_24 (image, dest, offset, converted);
 	break;
     case 32:
 	WRITE (image, ((uint32_t *)dest + offset), converted);
 	break;
     default:
 	*dest = 0x0;
 	break;
     }
 }
 #define MAKE_ACCESSORS(format)						\
     static void								\
     fetch_scanline_ ## format (pixman_image_t *image,			\
 			       int	       x,			\
 			       int             y,			\
 			       int             width,			\
 			       uint32_t *      buffer,			\
 			       const uint32_t *mask)			\
     {									\
 	uint8_t *bits =							\
 	    (uint8_t *)(image->bits.bits + y * image->bits.rowstride);	\
 	int i;								\
 									\
 	for (i = 0; i < width; ++i)					\
 	{								\
 	    *buffer++ =							\
 		fetch_and_convert_pixel (image, bits, x + i, PIXMAN_ ## format); \
 	}								\
     }									\
 									\
     static void								\
     store_scanline_ ## format (bits_image_t *  image,			\
 			       int             x,			\
 			       int             y,			\
 			       int             width,			\
 			       const uint32_t *values)			\
     {									\
 	uint8_t *dest =							\
 	    (uint8_t *)(image->bits + y * image->rowstride);		\
 	int i;								\
 									\
 	for (i = 0; i < width; ++i)					\
 	{								\
 	    convert_and_store_pixel (					\
 		image, dest, i + x, PIXMAN_ ## format, values[i]);	\
 	}								\
     }									\
 									\
     static uint32_t							\
     fetch_pixel_ ## format (bits_image_t *image,			\
 			    int		offset,				\
 			    int		line)				\
     {									\
 	uint8_t *bits =							\
 	    (uint8_t *)(image->bits + line * image->rowstride);		\
 									\
 	return fetch_and_convert_pixel ((pixman_image_t *)image,	\
 					bits, offset, PIXMAN_ ## format); \
     }									\
 									\
     static const void *const __dummy__ ## format
 MAKE_ACCESSORS(a8r8g8b8);
 MAKE_ACCESSORS(x8r8g8b8);
 MAKE_ACCESSORS(a8b8g8r8);
 MAKE_ACCESSORS(x8b8g8r8);
 MAKE_ACCESSORS(x14r6g6b6);
 MAKE_ACCESSORS(b8g8r8a8);
 MAKE_ACCESSORS(b8g8r8x8);
 MAKE_ACCESSORS(r8g8b8x8);
 MAKE_ACCESSORS(r8g8b8a8);
 MAKE_ACCESSORS(r8g8b8);
 MAKE_ACCESSORS(b8g8r8);
 MAKE_ACCESSORS(r5g6b5);
 MAKE_ACCESSORS(b5g6r5);
 MAKE_ACCESSORS(a1r5g5b5);
 MAKE_ACCESSORS(x1r5g5b5);
 MAKE_ACCESSORS(a1b5g5r5);
 MAKE_ACCESSORS(x1b5g5r5);
 MAKE_ACCESSORS(a4r4g4b4);
 MAKE_ACCESSORS(x4r4g4b4);
 MAKE_ACCESSORS(a4b4g4r4);
 MAKE_ACCESSORS(x4b4g4r4);
 MAKE_ACCESSORS(a8);
 MAKE_ACCESSORS(c8);
 MAKE_ACCESSORS(g8);
 MAKE_ACCESSORS(r3g3b2);
 MAKE_ACCESSORS(b2g3r3);
 MAKE_ACCESSORS(a2r2g2b2);
 MAKE_ACCESSORS(a2b2g2r2);
 MAKE_ACCESSORS(x4a4);
 MAKE_ACCESSORS(a4);
 MAKE_ACCESSORS(g4);
 MAKE_ACCESSORS(c4);
 MAKE_ACCESSORS(r1g2b1);
 MAKE_ACCESSORS(b1g2r1);
 MAKE_ACCESSORS(a1r1g1b1);
 MAKE_ACCESSORS(a1b1g1r1);
 MAKE_ACCESSORS(a1);
 MAKE_ACCESSORS(g1);
 /********************************** Fetch ************************************/
 /* Table mapping sRGB-encoded 8 bit numbers to linearly encoded
  * floating point numbers. We assume that single precision
  * floating point follows the IEEE 754 format.
  */
 static const uint32_t to_linear_u[256] =
 {
 x00000000, 0x399f22b4, 0x3a1f22b4, 0x3a6eb40e, 0x3a9f22b4, 0x3ac6eb61,
 x3aeeb40e, 0x3b0b3e5d, 0x3b1f22b4, 0x3b33070b, 0x3b46eb61, 0x3b5b518a,
 x3b70f18a, 0x3b83e1c5, 0x3b8fe614, 0x3b9c87fb, 0x3ba9c9b5, 0x3bb7ad6d,
 x3bc63547, 0x3bd5635f, 0x3be539bd, 0x3bf5ba70, 0x3c0373b5, 0x3c0c6152,
 x3c15a703, 0x3c1f45bc, 0x3c293e68, 0x3c3391f4, 0x3c3e4149, 0x3c494d43,
 x3c54b6c7, 0x3c607eb1, 0x3c6ca5df, 0x3c792d22, 0x3c830aa8, 0x3c89af9e,
 x3c9085db, 0x3c978dc5, 0x3c9ec7c0, 0x3ca63432, 0x3cadd37d, 0x3cb5a601,
 x3cbdac20, 0x3cc5e639, 0x3cce54ab, 0x3cd6f7d2, 0x3cdfd00e, 0x3ce8ddb9,
 x3cf2212c, 0x3cfb9ac1, 0x3d02a569, 0x3d0798dc, 0x3d0ca7e4, 0x3d11d2ae,
 x3d171963, 0x3d1c7c2e, 0x3d21fb3a, 0x3d2796af, 0x3d2d4ebb, 0x3d332380,
 x3d39152b, 0x3d3f23e3, 0x3d454fd0, 0x3d4b991c, 0x3d51ffeb, 0x3d588466,
 x3d5f26b7, 0x3d65e6fe, 0x3d6cc564, 0x3d73c210, 0x3d7add25, 0x3d810b65,
 x3d84b793, 0x3d88732e, 0x3d8c3e48, 0x3d9018f4, 0x3d940343, 0x3d97fd48,
 x3d9c0714, 0x3da020b9, 0x3da44a48, 0x3da883d6, 0x3daccd70, 0x3db12728,
 x3db59110, 0x3dba0b38, 0x3dbe95b2, 0x3dc3308f, 0x3dc7dbe0, 0x3dcc97b4,
 x3dd1641c, 0x3dd6412a, 0x3ddb2eec, 0x3de02d75, 0x3de53cd3, 0x3dea5d16,
 x3def8e52, 0x3df4d091, 0x3dfa23e5, 0x3dff885e, 0x3e027f06, 0x3e05427f,
 x3e080ea2, 0x3e0ae376, 0x3e0dc104, 0x3e10a752, 0x3e139669, 0x3e168e50,
 x3e198f0e, 0x3e1c98ab, 0x3e1fab2e, 0x3e22c6a0, 0x3e25eb08, 0x3e29186a,
 x3e2c4ed0, 0x3e2f8e42, 0x3e32d6c4, 0x3e362861, 0x3e39831e, 0x3e3ce702,
 x3e405416, 0x3e43ca5e, 0x3e4749e4, 0x3e4ad2ae, 0x3e4e64c2, 0x3e520027,
 x3e55a4e6, 0x3e595303, 0x3e5d0a8a, 0x3e60cb7c, 0x3e6495e0, 0x3e6869bf,
 x3e6c4720, 0x3e702e08, 0x3e741e7f, 0x3e78188c, 0x3e7c1c34, 0x3e8014c0,
 x3e822039, 0x3e84308b, 0x3e8645b8, 0x3e885fc3, 0x3e8a7eb0, 0x3e8ca281,
 x3e8ecb3a, 0x3e90f8df, 0x3e932b72, 0x3e9562f6, 0x3e979f6f, 0x3e99e0e0,
 x3e9c274e, 0x3e9e72b8, 0x3ea0c322, 0x3ea31892, 0x3ea57308, 0x3ea7d28a,
 x3eaa3718, 0x3eaca0b7, 0x3eaf0f69, 0x3eb18332, 0x3eb3fc16, 0x3eb67a15,
 x3eb8fd34, 0x3ebb8576, 0x3ebe12de, 0x3ec0a56e, 0x3ec33d2a, 0x3ec5da14,
 x3ec87c30, 0x3ecb2380, 0x3ecdd008, 0x3ed081ca, 0x3ed338c9, 0x3ed5f508,
 x3ed8b68a, 0x3edb7d52, 0x3ede4962, 0x3ee11abe, 0x3ee3f168, 0x3ee6cd64,
 x3ee9aeb6, 0x3eec955d, 0x3eef815d, 0x3ef272ba, 0x3ef56976, 0x3ef86594,
 x3efb6717, 0x3efe6e02, 0x3f00bd2b, 0x3f02460c, 0x3f03d1a5, 0x3f055ff8,
 x3f06f105, 0x3f0884ce, 0x3f0a1b54, 0x3f0bb499, 0x3f0d509f, 0x3f0eef65,
 x3f1090ef, 0x3f12353c, 0x3f13dc50, 0x3f15862a, 0x3f1732cc, 0x3f18e237,
 x3f1a946d, 0x3f1c4970, 0x3f1e013f, 0x3f1fbbde, 0x3f21794c, 0x3f23398c,
 x3f24fca0, 0x3f26c286, 0x3f288b42, 0x3f2a56d3, 0x3f2c253d, 0x3f2df680,
 x3f2fca9d, 0x3f31a195, 0x3f337b6a, 0x3f35581e, 0x3f3737b1, 0x3f391a24,
 x3f3aff7a, 0x3f3ce7b2, 0x3f3ed2d0, 0x3f40c0d2, 0x3f42b1bc, 0x3f44a58e,
 x3f469c49, 0x3f4895ee, 0x3f4a9280, 0x3f4c91ff, 0x3f4e946c, 0x3f5099c8,
 x3f52a216, 0x3f54ad55, 0x3f56bb88, 0x3f58ccae, 0x3f5ae0cb, 0x3f5cf7de,
 x3f5f11ec, 0x3f612ef0, 0x3f634eef, 0x3f6571ea, 0x3f6797e1, 0x3f69c0d6,
 x3f6beccb, 0x3f6e1bc0, 0x3f704db6, 0x3f7282af, 0x3f74baac, 0x3f76f5ae,
 x3f7933b6, 0x3f7b74c6, 0x3f7db8de, 0x3f800000
 };
 static const float * const to_linear = (const float *)to_linear_u;
 static uint8_t
 to_srgb (float f)
 {
     uint8_t low = 0;
     uint8_t high = 255;
     while (high - low > 1)
     {
 	uint8_t mid = (low + high) / 2;
 	if (to_linear[mid] > f)
 	    high = mid;
 	else
 	    low = mid;
     }
     if (to_linear[high] - f < f - to_linear[low])
 	return high;
     else
 	return low;
 }
 static void
 fetch_scanline_a8r8g8b8_sRGB_float (pixman_image_t *image,
 				    int             x,
 				    int             y,
 				    int             width,
 				    uint32_t *      b,
 				    const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = bits + x;
     const uint32_t *end = pixel + width;
     argb_t *buffer = (argb_t *)b;
     while (pixel < end)
     {
 	uint32_t p = READ (image, pixel++);
 	argb_t *argb = buffer;
 	argb->a = pixman_unorm_to_float ((p >> 24) & 0xff, 8);
 	argb->r = to_linear [(p >> 16) & 0xff];
 	argb->g = to_linear [(p >>  8) & 0xff];
 	argb->b = to_linear [(p >>  0) & 0xff];
 	buffer++;
     }
 }
 /* Expects a float buffer */
 static void
 fetch_scanline_a2r10g10b10_float (pixman_image_t *image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  uint32_t *      b,
 				  const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = bits + x;
     const uint32_t *end = pixel + width;
     argb_t *buffer = (argb_t *)b;
     while (pixel < end)
     {
 	uint32_t p = READ (image, pixel++);
 	uint64_t a = p >> 30;
 	uint64_t r = (p >> 20) & 0x3ff;
 	uint64_t g = (p >> 10) & 0x3ff;
 	uint64_t b = p & 0x3ff;
 	buffer->a = pixman_unorm_to_float (a, 2);
 	buffer->r = pixman_unorm_to_float (r, 10);
 	buffer->g = pixman_unorm_to_float (g, 10);
 	buffer->b = pixman_unorm_to_float (b, 10);
 	buffer++;
     }
 }
 /* Expects a float buffer */
 static void
 fetch_scanline_x2r10g10b10_float (pixman_image_t *image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  uint32_t *      b,
 				  const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = (uint32_t *)bits + x;
     const uint32_t *end = pixel + width;
     argb_t *buffer = (argb_t *)b;
     while (pixel < end)
     {
 	uint32_t p = READ (image, pixel++);
 	uint64_t r = (p >> 20) & 0x3ff;
 	uint64_t g = (p >> 10) & 0x3ff;
 	uint64_t b = p & 0x3ff;
 	buffer->a = 1.0;
 	buffer->r = pixman_unorm_to_float (r, 10);
 	buffer->g = pixman_unorm_to_float (g, 10);
 	buffer->b = pixman_unorm_to_float (b, 10);
 	buffer++;
     }
 }
 /* Expects a float buffer */
 static void
 fetch_scanline_a2b10g10r10_float (pixman_image_t *image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  uint32_t *      b,
 				  const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = bits + x;
     const uint32_t *end = pixel + width;
     argb_t *buffer = (argb_t *)b;
     while (pixel < end)
     {
 	uint32_t p = READ (image, pixel++);
 	uint64_t a = p >> 30;
 	uint64_t b = (p >> 20) & 0x3ff;
 	uint64_t g = (p >> 10) & 0x3ff;
 	uint64_t r = p & 0x3ff;
 	buffer->a = pixman_unorm_to_float (a, 2);
 	buffer->r = pixman_unorm_to_float (r, 10);
 	buffer->g = pixman_unorm_to_float (g, 10);
 	buffer->b = pixman_unorm_to_float (b, 10);
 	buffer++;
     }
 }
 /* Expects a float buffer */
 static void
 fetch_scanline_x2b10g10r10_float (pixman_image_t *image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  uint32_t *      b,
 				  const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = (uint32_t *)bits + x;
     const uint32_t *end = pixel + width;
     argb_t *buffer = (argb_t *)b;
     while (pixel < end)
     {
 	uint32_t p = READ (image, pixel++);
 	uint64_t b = (p >> 20) & 0x3ff;
 	uint64_t g = (p >> 10) & 0x3ff;
 	uint64_t r = p & 0x3ff;
 	buffer->a = 1.0;
 	buffer->r = pixman_unorm_to_float (r, 10);
 	buffer->g = pixman_unorm_to_float (g, 10);
 	buffer->b = pixman_unorm_to_float (b, 10);
 	buffer++;
     }
 }
 static void
 fetch_scanline_yuy2 (pixman_image_t *image,
                      int             x,
                      int             line,
                      int             width,
                      uint32_t *      buffer,
                      const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + image->bits.rowstride * line;
     int i;
     for (i = 0; i < width; i++)
     {
 	int16_t y, u, v;
 	int32_t r, g, b;
 	y = ((uint8_t *) bits)[(x + i) << 1] - 16;
 	u = ((uint8_t *) bits)[(((x + i) << 1) & - 4) + 1] - 128;
 	v = ((uint8_t *) bits)[(((x + i) << 1) & - 4) + 3] - 128;
 	/* R = 1.164(Y - 16) + 1.596(V - 128) */
 	r = 0x012b27 * y + 0x019a2e * v;
 	/* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
 	g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
 	/* B = 1.164(Y - 16) + 2.018(U - 128) */
 	b = 0x012b27 * y + 0x0206a2 * u;
 	*buffer++ = 0xff000000 |
 	    (r >= 0 ? r < 0x1000000 ? r         & 0xff0000 : 0xff0000 : 0) |
 	    (g >= 0 ? g < 0x1000000 ? (g >> 8)  & 0x00ff00 : 0x00ff00 : 0) |
 	    (b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
     }
 }
 static void
 fetch_scanline_yv12 (pixman_image_t *image,
                      int             x,
                      int             line,
                      int             width,
                      uint32_t *      buffer,
                      const uint32_t *mask)
 {
     YV12_SETUP (image);
     uint8_t *y_line = YV12_Y (line);
     uint8_t *u_line = YV12_U (line);
     uint8_t *v_line = YV12_V (line);
     int i;
     for (i = 0; i < width; i++)
     {
 	int16_t y, u, v;
 	int32_t r, g, b;
 	y = y_line[x + i] - 16;
 	u = u_line[(x + i) >> 1] - 128;
 	v = v_line[(x + i) >> 1] - 128;
 	/* R = 1.164(Y - 16) + 1.596(V - 128) */
 	r = 0x012b27 * y + 0x019a2e * v;
 	/* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
 	g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
 	/* B = 1.164(Y - 16) + 2.018(U - 128) */
 	b = 0x012b27 * y + 0x0206a2 * u;
 	*buffer++ = 0xff000000 |
 	    (r >= 0 ? r < 0x1000000 ? r         & 0xff0000 : 0xff0000 : 0) |
 	    (g >= 0 ? g < 0x1000000 ? (g >> 8)  & 0x00ff00 : 0x00ff00 : 0) |
 	    (b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
     }
 }
 /**************************** Pixel wise fetching *****************************/
 static argb_t
 fetch_pixel_x2r10g10b10_float (bits_image_t *image,
 			       int	   offset,
 			       int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t p = READ (image, bits + offset);
     uint64_t r = (p >> 20) & 0x3ff;
     uint64_t g = (p >> 10) & 0x3ff;
     uint64_t b = p & 0x3ff;
     argb_t argb;
     argb.a = 1.0;
     argb.r = pixman_unorm_to_float (r, 10);
     argb.g = pixman_unorm_to_float (g, 10);
     argb.b = pixman_unorm_to_float (b, 10);
     return argb;
 }
 static argb_t
 fetch_pixel_a2r10g10b10_float (bits_image_t *image,
 			       int	     offset,
 			       int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t p = READ (image, bits + offset);
     uint64_t a = p >> 30;
     uint64_t r = (p >> 20) & 0x3ff;
     uint64_t g = (p >> 10) & 0x3ff;
     uint64_t b = p & 0x3ff;
     argb_t argb;
     argb.a = pixman_unorm_to_float (a, 2);
     argb.r = pixman_unorm_to_float (r, 10);
     argb.g = pixman_unorm_to_float (g, 10);
     argb.b = pixman_unorm_to_float (b, 10);
     return argb;
 }
 static argb_t
 fetch_pixel_a2b10g10r10_float (bits_image_t *image,
 			       int           offset,
 			       int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t p = READ (image, bits + offset);
     uint64_t a = p >> 30;
     uint64_t b = (p >> 20) & 0x3ff;
     uint64_t g = (p >> 10) & 0x3ff;
     uint64_t r = p & 0x3ff;
     argb_t argb;
     argb.a = pixman_unorm_to_float (a, 2);
     argb.r = pixman_unorm_to_float (r, 10);
     argb.g = pixman_unorm_to_float (g, 10);
     argb.b = pixman_unorm_to_float (b, 10);
     return argb;
 }
 static argb_t
 fetch_pixel_x2b10g10r10_float (bits_image_t *image,
 			       int           offset,
 			       int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t p = READ (image, bits + offset);
     uint64_t b = (p >> 20) & 0x3ff;
     uint64_t g = (p >> 10) & 0x3ff;
     uint64_t r = p & 0x3ff;
     argb_t argb;
     argb.a = 1.0;
     argb.r = pixman_unorm_to_float (r, 10);
     argb.g = pixman_unorm_to_float (g, 10);
     argb.b = pixman_unorm_to_float (b, 10);
     return argb;
 }
 static argb_t
 fetch_pixel_a8r8g8b8_sRGB_float (bits_image_t *image,
 				 int	       offset,
 				 int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t p = READ (image, bits + offset);
     argb_t argb;
     argb.a = pixman_unorm_to_float ((p >> 24) & 0xff, 8);
     argb.r = to_linear [(p >> 16) & 0xff];
     argb.g = to_linear [(p >>  8) & 0xff];
     argb.b = to_linear [(p >>  0) & 0xff];
     return argb;
 }
 static uint32_t
 fetch_pixel_yuy2 (bits_image_t *image,
 		  int           offset,
 		  int           line)
 {
     const uint32_t *bits = image->bits + image->rowstride * line;
     int16_t y, u, v;
     int32_t r, g, b;
     y = ((uint8_t *) bits)[offset << 1] - 16;
     u = ((uint8_t *) bits)[((offset << 1) & - 4) + 1] - 128;
     v = ((uint8_t *) bits)[((offset << 1) & - 4) + 3] - 128;
     /* R = 1.164(Y - 16) + 1.596(V - 128) */
     r = 0x012b27 * y + 0x019a2e * v;
     /* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
     g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
     /* B = 1.164(Y - 16) + 2.018(U - 128) */
     b = 0x012b27 * y + 0x0206a2 * u;
     return 0xff000000 |
 	(r >= 0 ? r < 0x1000000 ? r         & 0xff0000 : 0xff0000 : 0) |
 	(g >= 0 ? g < 0x1000000 ? (g >> 8)  & 0x00ff00 : 0x00ff00 : 0) |
 	(b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
 }
 static uint32_t
 fetch_pixel_yv12 (bits_image_t *image,
 		  int           offset,
 		  int           line)
 {
     YV12_SETUP (image);
     int16_t y = YV12_Y (line)[offset] - 16;
     int16_t u = YV12_U (line)[offset >> 1] - 128;
     int16_t v = YV12_V (line)[offset >> 1] - 128;
     int32_t r, g, b;
     /* R = 1.164(Y - 16) + 1.596(V - 128) */
     r = 0x012b27 * y + 0x019a2e * v;
     /* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
     g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
     /* B = 1.164(Y - 16) + 2.018(U - 128) */
     b = 0x012b27 * y + 0x0206a2 * u;
     return 0xff000000 |
 	(r >= 0 ? r < 0x1000000 ? r         & 0xff0000 : 0xff0000 : 0) |
 	(g >= 0 ? g < 0x1000000 ? (g >> 8)  & 0x00ff00 : 0x00ff00 : 0) |
 	(b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
 }
 /*********************************** Store ************************************/
 static void
 store_scanline_a2r10g10b10_float (bits_image_t *  image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint32_t *pixel = bits + x;
     argb_t *values = (argb_t *)v;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint16_t a, r, g, b;
 	a = pixman_float_to_unorm (values[i].a, 2);
 	r = pixman_float_to_unorm (values[i].r, 10);
 	g = pixman_float_to_unorm (values[i].g, 10);
 	b = pixman_float_to_unorm (values[i].b, 10);
 	WRITE (image, pixel++,
 	       (a << 30) | (r << 20) | (g << 10) | b);
     }
 }
 static void
 store_scanline_x2r10g10b10_float (bits_image_t *  image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint32_t *pixel = bits + x;
     argb_t *values = (argb_t *)v;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint16_t r, g, b;
 	r = pixman_float_to_unorm (values[i].r, 10);
 	g = pixman_float_to_unorm (values[i].g, 10);
 	b = pixman_float_to_unorm (values[i].b, 10);
 	WRITE (image, pixel++,
 	       (r << 20) | (g << 10) | b);
     }
 }
 static void
 store_scanline_a2b10g10r10_float (bits_image_t *  image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint32_t *pixel = bits + x;
     argb_t *values = (argb_t *)v;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint16_t a, r, g, b;
 	a = pixman_float_to_unorm (values[i].a, 2);
 	r = pixman_float_to_unorm (values[i].r, 10);
 	g = pixman_float_to_unorm (values[i].g, 10);
 	b = pixman_float_to_unorm (values[i].b, 10);
 	WRITE (image, pixel++,
 	       (a << 30) | (b << 20) | (g << 10) | r);
     }
 }
 static void
 store_scanline_x2b10g10r10_float (bits_image_t *  image,
 				  int             x,
 				  int             y,
 				  int             width,
 				  const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint32_t *pixel = bits + x;
     argb_t *values = (argb_t *)v;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint16_t r, g, b;
 	r = pixman_float_to_unorm (values[i].r, 10);
 	g = pixman_float_to_unorm (values[i].g, 10);
 	b = pixman_float_to_unorm (values[i].b, 10);
 	WRITE (image, pixel++,
 	       (b << 20) | (g << 10) | r);
     }
 }
 static void
 store_scanline_a8r8g8b8_sRGB_float (bits_image_t *  image,
 				    int             x,
 				    int             y,
 				    int             width,
 				    const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint32_t *pixel = bits + x;
     argb_t *values = (argb_t *)v;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint8_t a, r, g, b;
 	a = pixman_float_to_unorm (values[i].a, 8);
 	r = to_srgb (values[i].r);
 	g = to_srgb (values[i].g);
 	b = to_srgb (values[i].b);
 	WRITE (image, pixel++,
 	       (a << 24) | (r << 16) | (g << 8) | b);
     }
 }
 static void
 store_scanline_16 (bits_image_t *  image,
 		   int             x,
 		   int             y,
 		   int             width,
 		   const uint32_t *v)
 {
     uint16_t *bits = (uint16_t*)(image->bits + image->rowstride * y);
     uint16_t *values = (uint16_t *)v;
     uint16_t *pixel = bits + x;
     int i;
     for (i = 0; i < width; ++i)
     {
 	WRITE (image, pixel++, values[i]);
     }
 }
 static void
 fetch_scanline_16 (pixman_image_t *image,
                             int             x,
                             int             y,
                             int             width,
                             uint32_t *      b,
                             const uint32_t *mask)
 {
     const uint16_t *bits = (uint16_t*)(image->bits.bits + y * image->bits.rowstride);
     const uint16_t *pixel = bits + x;
     int i;
     uint16_t *buffer = (uint16_t *)b;
     for (i = 0; i < width; ++i)
     {
 	*buffer++ = READ (image, pixel++);
     }
 }
 /*
  * Contracts a floating point image to 32bpp and then stores it using a
  * regular 32-bit store proc. Despite the type, this function expects an
  * argb_t buffer.
  */
 static void
 store_scanline_generic_float (bits_image_t *  image,
 			      int             x,
 			      int             y,
 			      int             width,
 			      const uint32_t *values)
 {
     uint32_t *argb8_pixels;
     assert (image->common.type == BITS);
     argb8_pixels = pixman_malloc_ab (width, sizeof(uint32_t));
     if (!argb8_pixels)
 	return;
     /* Contract the scanline.  We could do this in place if values weren't
      * const.
      */
     pixman_contract_from_float (argb8_pixels, (argb_t *)values, width);
     image->store_scanline_32 (image, x, y, width, argb8_pixels);
     free (argb8_pixels);
 }
 static void
 fetch_scanline_generic_float (pixman_image_t *image,
 			      int	      x,
 			      int	      y,
 			      int	      width,
 			      uint32_t *      buffer,
 			      const uint32_t *mask)
 {
     image->bits.fetch_scanline_32 (image, x, y, width, buffer, NULL);
     pixman_expand_to_float ((argb_t *)buffer, buffer, image->bits.format, width);
 }
 /* The 32_sRGB paths should be deleted after narrow processing
  * is no longer invoked for formats that are considered wide.
  * (Also see fetch_pixel_generic_lossy_32) */
 static void
 fetch_scanline_a8r8g8b8_32_sRGB (pixman_image_t *image,
                                  int             x,
                                  int             y,
                                  int             width,
                                  uint32_t       *buffer,
                                  const uint32_t *mask)
 {
     const uint32_t *bits = image->bits.bits + y * image->bits.rowstride;
     const uint32_t *pixel = (uint32_t *)bits + x;
     const uint32_t *end = pixel + width;
     uint32_t tmp;
     while (pixel < end)
     {
 	uint8_t a, r, g, b;
 	tmp = READ (image, pixel++);
 	a = (tmp >> 24) & 0xff;
 	r = (tmp >> 16) & 0xff;
 	g = (tmp >> 8) & 0xff;
 	b = (tmp >> 0) & 0xff;
 	r = to_linear[r] * 255.0f + 0.5f;
 	g = to_linear[g] * 255.0f + 0.5f;
 	b = to_linear[b] * 255.0f + 0.5f;
 	*buffer++ = (a << 24) | (r << 16) | (g << 8) | (b << 0);
     }
 }
 static uint32_t
 fetch_pixel_a8r8g8b8_32_sRGB (bits_image_t *image,
 			      int           offset,
 			      int           line)
 {
     uint32_t *bits = image->bits + line * image->rowstride;
     uint32_t tmp = READ (image, bits + offset);
     uint8_t a, r, g, b;
     a = (tmp >> 24) & 0xff;
     r = (tmp >> 16) & 0xff;
     g = (tmp >> 8) & 0xff;
     b = (tmp >> 0) & 0xff;
     r = to_linear[r] * 255.0f + 0.5f;
     g = to_linear[g] * 255.0f + 0.5f;
     b = to_linear[b] * 255.0f + 0.5f;
     return (a << 24) | (r << 16) | (g << 8) | (b << 0);
 }
 static void
 store_scanline_a8r8g8b8_32_sRGB (bits_image_t   *image,
                                  int             x,
                                  int             y,
                                  int             width,
                                  const uint32_t *v)
 {
     uint32_t *bits = image->bits + image->rowstride * y;
     uint64_t *values = (uint64_t *)v;
     uint32_t *pixel = bits + x;
     uint64_t tmp;
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint8_t a, r, g, b;
 	tmp = values[i];
 	a = (tmp >> 24) & 0xff;
 	r = (tmp >> 16) & 0xff;
 	g = (tmp >> 8) & 0xff;
 	b = (tmp >> 0) & 0xff;
 	r = to_srgb (r * (1/255.0f));
 	g = to_srgb (g * (1/255.0f));
 	b = to_srgb (b * (1/255.0f));
 	WRITE (image, pixel++, a | (r << 16) | (g << 8) | (b << 0));
     }
 }
 static argb_t
 fetch_pixel_generic_float (bits_image_t *image,
 			   int		 offset,
 			   int           line)
 {
     uint32_t pixel32 = image->fetch_pixel_32 (image, offset, line);
     argb_t f;
     pixman_expand_to_float (&f, &pixel32, image->format, 1);
     return f;
 }
 /*
  * XXX: The transformed fetch path only works at 32-bpp so far.  When all
  * paths have wide versions, this can be removed.
  *
  * WARNING: This function loses precision!
  */
 static uint32_t
 fetch_pixel_generic_lossy_32 (bits_image_t *image,
 			      int           offset,
 			      int           line)
 {
     argb_t pixel64 = image->fetch_pixel_float (image, offset, line);
     uint32_t result;
     pixman_contract_from_float (&result, &pixel64, 1);
     return result;
 }
 typedef struct
 {
     pixman_format_code_t	format;
     fetch_scanline_t		fetch_scanline_16;
     fetch_scanline_t		fetch_scanline_32;
     fetch_scanline_t		fetch_scanline_float;
     fetch_pixel_32_t		fetch_pixel_32;
     fetch_pixel_float_t		fetch_pixel_float;
     store_scanline_t		store_scanline_16;
     store_scanline_t		store_scanline_32;
     store_scanline_t		store_scanline_float;
 } format_info_t;
 #define FORMAT_INFO(format) 						\
     {									\
 	PIXMAN_ ## format,						\
 	    NULL,							\
 	    fetch_scanline_ ## format,					\
 	    fetch_scanline_generic_float,				\
 	    fetch_pixel_ ## format,					\
 	    fetch_pixel_generic_float,					\
 	    NULL,							\
 	    store_scanline_ ## format,					\
 	    store_scanline_generic_float				\
     }
 #define FORMAT_INFO16(format) 						\
     {									\
 	PIXMAN_ ## format,						\
 	    fetch_scanline_16,						\
 	    fetch_scanline_ ## format,					\
 	    fetch_scanline_generic_float,				\
 	    fetch_pixel_ ## format,					\
 	    fetch_pixel_generic_float,					\
 	    store_scanline_16,						\
 	    store_scanline_ ## format,					\
 	    store_scanline_generic_float				\
     }
 static const format_info_t accessors[] =
 {
 /* 32 bpp formats */
     FORMAT_INFO (a8r8g8b8),
     FORMAT_INFO (x8r8g8b8),
     FORMAT_INFO (a8b8g8r8),
     FORMAT_INFO (x8b8g8r8),
     FORMAT_INFO (b8g8r8a8),
     FORMAT_INFO (b8g8r8x8),
     FORMAT_INFO (r8g8b8a8),
     FORMAT_INFO (r8g8b8x8),
     FORMAT_INFO (x14r6g6b6),
 /* sRGB formats */
   { PIXMAN_a8r8g8b8_sRGB,
     NULL,
     fetch_scanline_a8r8g8b8_32_sRGB, fetch_scanline_a8r8g8b8_sRGB_float,
     fetch_pixel_a8r8g8b8_32_sRGB, fetch_pixel_a8r8g8b8_sRGB_float,
     NULL,
     store_scanline_a8r8g8b8_32_sRGB, store_scanline_a8r8g8b8_sRGB_float,
   },
 /* 24bpp formats */
     FORMAT_INFO (r8g8b8),
     FORMAT_INFO (b8g8r8),
 /* 16bpp formats */
     FORMAT_INFO16 (r5g6b5),
     FORMAT_INFO16 (b5g6r5),
     FORMAT_INFO (a1r5g5b5),
     FORMAT_INFO (x1r5g5b5),
     FORMAT_INFO (a1b5g5r5),
     FORMAT_INFO (x1b5g5r5),
     FORMAT_INFO (a4r4g4b4),
     FORMAT_INFO (x4r4g4b4),
     FORMAT_INFO (a4b4g4r4),
     FORMAT_INFO (x4b4g4r4),
 /* 8bpp formats */
     FORMAT_INFO (a8),
     FORMAT_INFO (r3g3b2),
     FORMAT_INFO (b2g3r3),
     FORMAT_INFO (a2r2g2b2),
     FORMAT_INFO (a2b2g2r2),
     FORMAT_INFO (c8),
     FORMAT_INFO (g8),
 #define fetch_scanline_x4c4 fetch_scanline_c8
 #define fetch_pixel_x4c4 fetch_pixel_c8
 #define store_scanline_x4c4 store_scanline_c8
     FORMAT_INFO (x4c4),
 #define fetch_scanline_x4g4 fetch_scanline_g8
 #define fetch_pixel_x4g4 fetch_pixel_g8
 #define store_scanline_x4g4 store_scanline_g8
     FORMAT_INFO (x4g4),
     FORMAT_INFO (x4a4),
 /* 4bpp formats */
     FORMAT_INFO (a4),
     FORMAT_INFO (r1g2b1),
     FORMAT_INFO (b1g2r1),
     FORMAT_INFO (a1r1g1b1),
     FORMAT_INFO (a1b1g1r1),
     FORMAT_INFO (c4),
     FORMAT_INFO (g4),
 /* 1bpp formats */
     FORMAT_INFO (a1),
     FORMAT_INFO (g1),
 /* Wide formats */
     { PIXMAN_a2r10g10b10,
       NULL, NULL, fetch_scanline_a2r10g10b10_float,
       fetch_pixel_generic_lossy_32, fetch_pixel_a2r10g10b10_float,
       NULL, NULL, store_scanline_a2r10g10b10_float },
     { PIXMAN_x2r10g10b10,
       NULL, NULL, fetch_scanline_x2r10g10b10_float,
       fetch_pixel_generic_lossy_32, fetch_pixel_x2r10g10b10_float,
       NULL, NULL, store_scanline_x2r10g10b10_float },
     { PIXMAN_a2b10g10r10,
       NULL, NULL, fetch_scanline_a2b10g10r10_float,
       fetch_pixel_generic_lossy_32, fetch_pixel_a2b10g10r10_float,
       NULL, NULL, store_scanline_a2b10g10r10_float },
     { PIXMAN_x2b10g10r10,
       NULL, NULL, fetch_scanline_x2b10g10r10_float,
       fetch_pixel_generic_lossy_32, fetch_pixel_x2b10g10r10_float,
       NULL, NULL, store_scanline_x2b10g10r10_float },
 /* YUV formats */
     { PIXMAN_yuy2,
       NULL, fetch_scanline_yuy2, fetch_scanline_generic_float,
       fetch_pixel_yuy2, fetch_pixel_generic_float,
       NULL, NULL, NULL },
     { PIXMAN_yv12,
       NULL, fetch_scanline_yv12, fetch_scanline_generic_float,
       fetch_pixel_yv12, fetch_pixel_generic_float,
       NULL, NULL, NULL },
     { PIXMAN_null },
 };
 static void
 setup_accessors (bits_image_t *image)
 {
     const format_info_t *info = accessors;
     while (info->format != PIXMAN_null)
     {
 	if (info->format == image->format)
 	{
 	    image->fetch_scanline_16 = info->fetch_scanline_16;
 	    image->fetch_scanline_32 = info->fetch_scanline_32;
 	    image->fetch_scanline_float = info->fetch_scanline_float;
 	    image->fetch_pixel_32 = info->fetch_pixel_32;
 	    image->fetch_pixel_float = info->fetch_pixel_float;
 	    image->store_scanline_16 = info->store_scanline_16;
 	    image->store_scanline_32 = info->store_scanline_32;
 	    image->store_scanline_float = info->store_scanline_float;
 	    return;
 	}
 	info++;
     }
 }
 #ifndef PIXMAN_FB_ACCESSORS
 void
 _pixman_bits_image_setup_accessors_accessors (bits_image_t *image);
 void
 _pixman_bits_image_setup_accessors (bits_image_t *image)
 {
     if (image->read_func || image->write_func)
 	_pixman_bits_image_setup_accessors_accessors (image);
     else
 	setup_accessors (image);
 }
 #else
 void
 _pixman_bits_image_setup_accessors_accessors (bits_image_t *image)
 {
     setup_accessors (image);
 }
 #endif

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gfx/cairo/libpixman/src/pixman-access.c