The Tor Browser: gfx/cairo/libpixman/src/pixman-combine32.c@b8a032363ba2 (annotated)

gfx/cairo/libpixman/src/pixman-combine32.c@b8a032363ba2 (annotated)

gfx/cairo/libpixman/src/pixman-combine32.c

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
  *             2005 Lars Knoll & Zack Rusin, Trolltech
  *
  * 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 <math.h>
 #include <string.h>
 #include "pixman-private.h"
 #include "pixman-combine32.h"
 /* component alpha helper functions */
 static void
 combine_mask_ca (uint32_t *src, uint32_t *mask)
 {
     uint32_t a = *mask;
     uint32_t x;
     uint16_t xa;
     if (!a)
     {
 	*(src) = 0;
 	return;
     }
     x = *(src);
     if (a == ~0)
     {
 	x = x >> A_SHIFT;
 	x |= x << G_SHIFT;
 	x |= x << R_SHIFT;
 	*(mask) = x;
 	return;
     }
     xa = x >> A_SHIFT;
     UN8x4_MUL_UN8x4 (x, a);
     *(src) = x;
     UN8x4_MUL_UN8 (a, xa);
     *(mask) = a;
 }
 static void
 combine_mask_value_ca (uint32_t *src, const uint32_t *mask)
 {
     uint32_t a = *mask;
     uint32_t x;
     if (!a)
     {
 	*(src) = 0;
 	return;
     }
     if (a == ~0)
 	return;
     x = *(src);
     UN8x4_MUL_UN8x4 (x, a);
     *(src) = x;
 }
 static void
 combine_mask_alpha_ca (const uint32_t *src, uint32_t *mask)
 {
     uint32_t a = *(mask);
     uint32_t x;
     if (!a)
 	return;
     x = *(src) >> A_SHIFT;
     if (x == MASK)
 	return;
     if (a == ~0)
     {
 	x |= x << G_SHIFT;
 	x |= x << R_SHIFT;
 	*(mask) = x;
 	return;
     }
     UN8x4_MUL_UN8 (a, x);
     *(mask) = a;
 }
 /*
  * There are two ways of handling alpha -- either as a single unified value or
  * a separate value for each component, hence each macro must have two
  * versions.  The unified alpha version has a 'u' at the end of the name,
  * the component version has a 'ca'.  Similarly, functions which deal with
  * this difference will have two versions using the same convention.
  */
 static force_inline uint32_t
 combine_mask (const uint32_t *src, const uint32_t *mask, int i)
 {
     uint32_t s, m;
     if (mask)
     {
 	m = *(mask + i) >> A_SHIFT;
 	if (!m)
 	    return 0;
     }
     s = *(src + i);
     if (mask)
 	UN8x4_MUL_UN8 (s, m);
     return s;
 }
 static void
 combine_clear (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     memset (dest, 0, width * sizeof(uint32_t));
 }
 static void
 combine_dst (pixman_implementation_t *imp,
 	     pixman_op_t	      op,
 	     uint32_t *		      dest,
 	     const uint32_t *	      src,
 	     const uint32_t *          mask,
 	     int		      width)
 {
     return;
 }
 static void
 combine_src_u (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     int i;
     if (!mask)
     {
 	memcpy (dest, src, width * sizeof (uint32_t));
     }
     else
     {
 	for (i = 0; i < width; ++i)
 	{
 	    uint32_t s = combine_mask (src, mask, i);
 	    *(dest + i) = s;
 	}
     }
 }
 static void
 combine_over_u (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     if (!mask)
     {
 	for (i = 0; i < width; ++i)
 	{
 	    uint32_t s = *(src + i);
 	    uint32_t a = ALPHA_8 (s);
 	    if (a == 0xFF)
 	    {
 		*(dest + i) = s;
 	    }
 	    else if (s)
 	    {
 		uint32_t d = *(dest + i);
 		uint32_t ia = a ^ 0xFF;
 		UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s);
 		*(dest + i) = d;
 	    }
 	}
     }
     else
     {
 	for (i = 0; i < width; ++i)
 	{
 	    uint32_t m = ALPHA_8 (*(mask + i));
 	    if (m == 0xFF)
 	    {
 		uint32_t s = *(src + i);
 		uint32_t a = ALPHA_8 (s);
 		if (a == 0xFF)
 		{
 		    *(dest + i) = s;
 		}
 		else if (s)
 		{
 		    uint32_t d = *(dest + i);
 		    uint32_t ia = a ^ 0xFF;
 		    UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s);
 		    *(dest + i) = d;
 		}
 	    }
 	    else if (m)
 	    {
 		uint32_t s = *(src + i);
 		if (s)
 		{
 		    uint32_t d = *(dest + i);
 		    UN8x4_MUL_UN8 (s, m);
 		    UN8x4_MUL_UN8_ADD_UN8x4 (d, ALPHA_8 (~s), s);
 		    *(dest + i) = d;
 		}
 	    }
 	}
     }
 }
 static void
 combine_over_reverse_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t ia = ALPHA_8 (~*(dest + i));
 	UN8x4_MUL_UN8_ADD_UN8x4 (s, ia, d);
 	*(dest + i) = s;
     }
 }
 static void
 combine_in_u (pixman_implementation_t *imp,
               pixman_op_t              op,
               uint32_t *                dest,
               const uint32_t *          src,
               const uint32_t *          mask,
               int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t a = ALPHA_8 (*(dest + i));
 	UN8x4_MUL_UN8 (s, a);
 	*(dest + i) = s;
     }
 }
 static void
 combine_in_reverse_u (pixman_implementation_t *imp,
                       pixman_op_t              op,
                       uint32_t *                dest,
                       const uint32_t *          src,
                       const uint32_t *          mask,
                       int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t a = ALPHA_8 (s);
 	UN8x4_MUL_UN8 (d, a);
 	*(dest + i) = d;
     }
 }
 static void
 combine_out_u (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t a = ALPHA_8 (~*(dest + i));
 	UN8x4_MUL_UN8 (s, a);
 	*(dest + i) = s;
     }
 }
 static void
 combine_out_reverse_u (pixman_implementation_t *imp,
                        pixman_op_t              op,
                        uint32_t *                dest,
                        const uint32_t *          src,
                        const uint32_t *          mask,
                        int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t a = ALPHA_8 (~s);
 	UN8x4_MUL_UN8 (d, a);
 	*(dest + i) = d;
     }
 }
 static void
 combine_atop_u (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t dest_a = ALPHA_8 (d);
 	uint32_t src_ia = ALPHA_8 (~s);
 	UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_a, d, src_ia);
 	*(dest + i) = s;
     }
 }
 static void
 combine_atop_reverse_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t src_a = ALPHA_8 (s);
 	uint32_t dest_ia = ALPHA_8 (~d);
 	UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_ia, d, src_a);
 	*(dest + i) = s;
     }
 }
 static void
 combine_xor_u (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t src_ia = ALPHA_8 (~s);
 	uint32_t dest_ia = ALPHA_8 (~d);
 	UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_ia, d, src_ia);
 	*(dest + i) = s;
     }
 }
 static void
 combine_add_u (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	UN8x4_ADD_UN8x4 (d, s);
 	*(dest + i) = d;
     }
 }
 static void
 combine_saturate_u (pixman_implementation_t *imp,
                     pixman_op_t              op,
                     uint32_t *                dest,
                     const uint32_t *          src,
                     const uint32_t *          mask,
                     int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint16_t sa, da;
 	sa = s >> A_SHIFT;
 	da = ~d >> A_SHIFT;
 	if (sa > da)
 	{
 	    sa = DIV_UN8 (da, sa);
 	    UN8x4_MUL_UN8 (s, sa);
 	}
 	;
 	UN8x4_ADD_UN8x4 (d, s);
 	*(dest + i) = d;
     }
 }
 /*
  * PDF blend modes:
  * The following blend modes have been taken from the PDF ISO 32000
  * specification, which at this point in time is available from
  * http://www.adobe.com/devnet/acrobat/pdfs/PDF32000_2008.pdf
  * The relevant chapters are 11.3.5 and 11.3.6.
  * The formula for computing the final pixel color given in 11.3.6 is:
  * αr × Cr = (1 – αs) × αb × Cb + (1 – αb) × αs × Cs + αb × αs × B(Cb, Cs)
  * with B() being the blend function.
  * Note that OVER is a special case of this operation, using B(Cb, Cs) = Cs
  *
  * These blend modes should match the SVG filter draft specification, as
  * it has been designed to mirror ISO 32000. Note that at the current point
  * no released draft exists that shows this, as the formulas have not been
  * updated yet after the release of ISO 32000.
  *
  * The default implementation here uses the PDF_SEPARABLE_BLEND_MODE and
  * PDF_NON_SEPARABLE_BLEND_MODE macros, which take the blend function as an
  * argument. Note that this implementation operates on premultiplied colors,
  * while the PDF specification does not. Therefore the code uses the formula
  * Cra = (1 – as) . Dca + (1 – ad) . Sca + B(Dca, ad, Sca, as)
  */
 /*
  * Multiply
  * B(Dca, ad, Sca, as) = Dca.Sca
  */
 static void
 combine_multiply_u (pixman_implementation_t *imp,
                     pixman_op_t              op,
                     uint32_t *                dest,
                     const uint32_t *          src,
                     const uint32_t *          mask,
                     int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t ss = s;
 	uint32_t src_ia = ALPHA_8 (~s);
 	uint32_t dest_ia = ALPHA_8 (~d);
 	UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (ss, dest_ia, d, src_ia);
 	UN8x4_MUL_UN8x4 (d, s);
 	UN8x4_ADD_UN8x4 (d, ss);
 	*(dest + i) = d;
     }
 }
 static void
 combine_multiply_ca (pixman_implementation_t *imp,
                      pixman_op_t              op,
                      uint32_t *                dest,
                      const uint32_t *          src,
                      const uint32_t *          mask,
                      int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t m = *(mask + i);
 	uint32_t s = *(src + i);
 	uint32_t d = *(dest + i);
 	uint32_t r = d;
 	uint32_t dest_ia = ALPHA_8 (~d);
 	combine_mask_ca (&s, &m);
 	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (r, ~m, s, dest_ia);
 	UN8x4_MUL_UN8x4 (d, s);
 	UN8x4_ADD_UN8x4 (r, d);
 	*(dest + i) = r;
     }
 }
 #define PDF_SEPARABLE_BLEND_MODE(name)					\
     static void								\
     combine_ ## name ## _u (pixman_implementation_t *imp,		\
 			    pixman_op_t              op,		\
                             uint32_t *                dest,		\
 			    const uint32_t *          src,		\
 			    const uint32_t *          mask,		\
 			    int                      width)		\
     {									\
 	int i;								\
 	for (i = 0; i < width; ++i) {					\
 	    uint32_t s = combine_mask (src, mask, i);			\
 	    uint32_t d = *(dest + i);					\
 	    uint8_t sa = ALPHA_8 (s);					\
 	    uint8_t isa = ~sa;						\
 	    uint8_t da = ALPHA_8 (d);					\
 	    uint8_t ida = ~da;						\
 	    uint32_t result;						\
 									\
 	    result = d;							\
 	    UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (result, isa, s, ida);	\
 	    								\
 	    *(dest + i) = result +					\
 		(DIV_ONE_UN8 (sa * (uint32_t)da) << A_SHIFT) +		\
 		(blend_ ## name (RED_8 (d), da, RED_8 (s), sa) << R_SHIFT) + \
 		(blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), sa) << G_SHIFT) + \
 		(blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), sa));	\
 	}								\
     }									\
     									\
     static void								\
     combine_ ## name ## _ca (pixman_implementation_t *imp,		\
 			     pixman_op_t              op,		\
                              uint32_t *                dest,		\
 			     const uint32_t *          src,		\
 			     const uint32_t *          mask,		\
 			     int                     width)		\
     {									\
 	int i;								\
 	for (i = 0; i < width; ++i) {					\
 	    uint32_t m = *(mask + i);					\
 	    uint32_t s = *(src + i);					\
 	    uint32_t d = *(dest + i);					\
 	    uint8_t da = ALPHA_8 (d);					\
 	    uint8_t ida = ~da;						\
 	    uint32_t result;						\
             								\
 	    combine_mask_ca (&s, &m);					\
             								\
 	    result = d;							\
 	    UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (result, ~m, s, ida);     \
             								\
 	    result +=							\
 	        (DIV_ONE_UN8 (ALPHA_8 (m) * (uint32_t)da) << A_SHIFT) +	\
 	        (blend_ ## name (RED_8 (d), da, RED_8 (s), RED_8 (m)) << R_SHIFT) + \
 	        (blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), GREEN_8 (m)) << G_SHIFT) + \
 	        (blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), BLUE_8 (m))); \
 	    								\
 	    *(dest + i) = result;					\
 	}								\
     }
 /*
  * Screen
  * B(Dca, ad, Sca, as) = Dca.sa + Sca.da - Dca.Sca
  */
 static inline uint32_t
 blend_screen (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     return DIV_ONE_UN8 (sca * da + dca * sa - sca * dca);
 }
 PDF_SEPARABLE_BLEND_MODE (screen)
 /*
  * Overlay
  * B(Dca, Da, Sca, Sa) =
  *   if 2.Dca < Da
  *     2.Sca.Dca
  *   otherwise
  *     Sa.Da - 2.(Da - Dca).(Sa - Sca)
  */
 static inline uint32_t
 blend_overlay (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     uint32_t rca;
     if (2 * dca < da)
 	rca = 2 * sca * dca;
     else
 	rca = sa * da - 2 * (da - dca) * (sa - sca);
     return DIV_ONE_UN8 (rca);
 }
 PDF_SEPARABLE_BLEND_MODE (overlay)
 /*
  * Darken
  * B(Dca, Da, Sca, Sa) = min (Sca.Da, Dca.Sa)
  */
 static inline uint32_t
 blend_darken (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     uint32_t s, d;
     s = sca * da;
     d = dca * sa;
     return DIV_ONE_UN8 (s > d ? d : s);
 }
 PDF_SEPARABLE_BLEND_MODE (darken)
 /*
  * Lighten
  * B(Dca, Da, Sca, Sa) = max (Sca.Da, Dca.Sa)
  */
 static inline uint32_t
 blend_lighten (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     uint32_t s, d;
     s = sca * da;
     d = dca * sa;
     return DIV_ONE_UN8 (s > d ? s : d);
 }
 PDF_SEPARABLE_BLEND_MODE (lighten)
 /*
  * Color dodge
  * B(Dca, Da, Sca, Sa) =
  *   if Dca == 0
  *     0
  *   if Sca == Sa
  *     Sa.Da
  *   otherwise
  *     Sa.Da. min (1, Dca / Da / (1 - Sca/Sa))
  */
 static inline uint32_t
 blend_color_dodge (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     if (sca >= sa)
     {
 	return dca == 0 ? 0 : DIV_ONE_UN8 (sa * da);
     }
     else
     {
 	uint32_t rca = dca * sa / (sa - sca);
 	return DIV_ONE_UN8 (sa * MIN (rca, da));
     }
 }
 PDF_SEPARABLE_BLEND_MODE (color_dodge)
 /*
  * Color burn
  * B(Dca, Da, Sca, Sa) =
  *   if Dca == Da
  *     Sa.Da
  *   if Sca == 0
  *     0
  *   otherwise
  *     Sa.Da.(1 - min (1, (1 - Dca/Da).Sa / Sca))
  */
 static inline uint32_t
 blend_color_burn (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     if (sca == 0)
     {
 	return dca < da ? 0 : DIV_ONE_UN8 (sa * da);
     }
     else
     {
 	uint32_t rca = (da - dca) * sa / sca;
 	return DIV_ONE_UN8 (sa * (MAX (rca, da) - rca));
     }
 }
 PDF_SEPARABLE_BLEND_MODE (color_burn)
 /*
  * Hard light
  * B(Dca, Da, Sca, Sa) =
  *   if 2.Sca < Sa
  *     2.Sca.Dca
  *   otherwise
  *     Sa.Da - 2.(Da - Dca).(Sa - Sca)
  */
 static inline uint32_t
 blend_hard_light (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     if (2 * sca < sa)
 	return DIV_ONE_UN8 (2 * sca * dca);
     else
 	return DIV_ONE_UN8 (sa * da - 2 * (da - dca) * (sa - sca));
 }
 PDF_SEPARABLE_BLEND_MODE (hard_light)
 /*
  * Soft light
  * B(Dca, Da, Sca, Sa) =
  *   if (2.Sca <= Sa)
  *     Dca.(Sa - (1 - Dca/Da).(2.Sca - Sa))
  *   otherwise if Dca.4 <= Da
  *     Dca.(Sa + (2.Sca - Sa).((16.Dca/Da - 12).Dca/Da + 3)
  *   otherwise
  *     (Dca.Sa + (SQRT (Dca/Da).Da - Dca).(2.Sca - Sa))
  */
 static inline uint32_t
 blend_soft_light (uint32_t dca_org,
 		  uint32_t da_org,
 		  uint32_t sca_org,
 		  uint32_t sa_org)
 {
     double dca = dca_org * (1.0 / MASK);
     double da = da_org * (1.0 / MASK);
     double sca = sca_org * (1.0 / MASK);
     double sa = sa_org * (1.0 / MASK);
     double rca;
     if (2 * sca < sa)
     {
 	if (da == 0)
 	    rca = dca * sa;
 	else
 	    rca = dca * sa - dca * (da - dca) * (sa - 2 * sca) / da;
     }
     else if (da == 0)
     {
 	rca = 0;
     }
     else if (4 * dca <= da)
     {
 	rca = dca * sa +
 	    (2 * sca - sa) * dca * ((16 * dca / da - 12) * dca / da + 3);
     }
     else
     {
 	rca = dca * sa + (sqrt (dca * da) - dca) * (2 * sca - sa);
     }
     return rca * MASK + 0.5;
 }
 PDF_SEPARABLE_BLEND_MODE (soft_light)
 /*
  * Difference
  * B(Dca, Da, Sca, Sa) = abs (Dca.Sa - Sca.Da)
  */
 static inline uint32_t
 blend_difference (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     uint32_t dcasa = dca * sa;
     uint32_t scada = sca * da;
     if (scada < dcasa)
 	return DIV_ONE_UN8 (dcasa - scada);
     else
 	return DIV_ONE_UN8 (scada - dcasa);
 }
 PDF_SEPARABLE_BLEND_MODE (difference)
 /*
  * Exclusion
  * B(Dca, Da, Sca, Sa) = (Sca.Da + Dca.Sa - 2.Sca.Dca)
  */
 /* This can be made faster by writing it directly and not using
  * PDF_SEPARABLE_BLEND_MODE, but that's a performance optimization */
 static inline uint32_t
 blend_exclusion (uint32_t dca, uint32_t da, uint32_t sca, uint32_t sa)
 {
     return DIV_ONE_UN8 (sca * da + dca * sa - 2 * dca * sca);
 }
 PDF_SEPARABLE_BLEND_MODE (exclusion)
 #undef PDF_SEPARABLE_BLEND_MODE
 /*
  * PDF nonseperable blend modes are implemented using the following functions
  * to operate in Hsl space, with Cmax, Cmid, Cmin referring to the max, mid
  * and min value of the red, green and blue components.
  *
  * LUM (C) = 0.3 × Cred + 0.59 × Cgreen + 0.11 × Cblue
  *
  * clip_color (C):
  *   l = LUM (C)
  *   min = Cmin
  *   max = Cmax
  *   if n < 0.0
  *     C = l + ( ( ( C – l ) × l ) ⁄ ( l – min ) )
  *   if x > 1.0
  *     C = l + ( ( ( C – l ) × ( 1 – l ) ) ⁄ ( max – l ) )
  *   return C
  *
  * set_lum (C, l):
  *   d = l – LUM (C)
  *   C += d
  *   return clip_color (C)
  *
  * SAT (C) = CH_MAX (C) - CH_MIN (C)
  *
  * set_sat (C, s):
  *  if Cmax > Cmin
  *    Cmid = ( ( ( Cmid – Cmin ) × s ) ⁄ ( Cmax – Cmin ) )
  *    Cmax = s
  *  else
  *    Cmid = Cmax = 0.0
  *  Cmin = 0.0
  *  return C
  */
 /* For premultiplied colors, we need to know what happens when C is
  * multiplied by a real number. LUM and SAT are linear:
  *
  *    LUM (r × C) = r × LUM (C)		SAT (r * C) = r * SAT (C)
  *
  * If we extend clip_color with an extra argument a and change
  *
  *        if x >= 1.0
  *
  * into
  *
  *        if x >= a
  *
  * then clip_color is also linear:
  *
  *    r * clip_color (C, a) = clip_color (r_c, ra);
  *
  * for positive r.
  *
  * Similarly, we can extend set_lum with an extra argument that is just passed
  * on to clip_color:
  *
  *   r * set_lum ( C, l, a)
  *
  *   = r × clip_color ( C + l - LUM (C), a)
  *
  *   = clip_color ( r * C + r × l - r * LUM (C), r * a)
  *
  *   = set_lum ( r * C, r * l, r * a)
  *
  * Finally, set_sat:
  *
  *    r * set_sat (C, s) = set_sat (x * C, r * s)
  *
  * The above holds for all non-zero x, because the x'es in the fraction for
  * C_mid cancel out. Specifically, it holds for x = r:
  *
  *    r * set_sat (C, s) = set_sat (r_c, rs)
  *
  */
 /* So, for the non-separable PDF blend modes, we have (using s, d for
  * non-premultiplied colors, and S, D for premultiplied:
  *
  *   Color:
  *
  *     a_s * a_d * B(s, d)
  *   = a_s * a_d * set_lum (S/a_s, LUM (D/a_d), 1)
  *   = set_lum (S * a_d, a_s * LUM (D), a_s * a_d)
  *
  *
  *   Luminosity:
  *
  *     a_s * a_d * B(s, d)
  *   = a_s * a_d * set_lum (D/a_d, LUM(S/a_s), 1)
  *   = set_lum (a_s * D, a_d * LUM(S), a_s * a_d)
  *
  *
  *   Saturation:
  *
  *     a_s * a_d * B(s, d)
  *   = a_s * a_d * set_lum (set_sat (D/a_d, SAT (S/a_s)), LUM (D/a_d), 1)
  *   = set_lum (a_s * a_d * set_sat (D/a_d, SAT (S/a_s)),
  *                                        a_s * LUM (D), a_s * a_d)
  *   = set_lum (set_sat (a_s * D, a_d * SAT (S), a_s * LUM (D), a_s * a_d))
  *
  *   Hue:
  *
  *     a_s * a_d * B(s, d)
  *   = a_s * a_d * set_lum (set_sat (S/a_s, SAT (D/a_d)), LUM (D/a_d), 1)
  *   = set_lum (set_sat (a_d * S, a_s * SAT (D)), a_s * LUM (D), a_s * a_d)
  *
  */
 #define CH_MIN(c) (c[0] < c[1] ? (c[0] < c[2] ? c[0] : c[2]) : (c[1] < c[2] ? c[1] : c[2]))
 #define CH_MAX(c) (c[0] > c[1] ? (c[0] > c[2] ? c[0] : c[2]) : (c[1] > c[2] ? c[1] : c[2]))
 #define LUM(c) ((c[0] * 30 + c[1] * 59 + c[2] * 11) / 100)
 #define SAT(c) (CH_MAX (c) - CH_MIN (c))
 #define PDF_NON_SEPARABLE_BLEND_MODE(name)				\
     static void								\
     combine_ ## name ## _u (pixman_implementation_t *imp,		\
 			    pixman_op_t op,				\
                             uint32_t *dest,				\
 			    const uint32_t *src,				\
 			    const uint32_t *mask,			\
 			    int width)					\
     {									\
 	int i;								\
 	for (i = 0; i < width; ++i)					\
 	{								\
 	    uint32_t s = combine_mask (src, mask, i);			\
 	    uint32_t d = *(dest + i);					\
 	    uint8_t sa = ALPHA_8 (s);					\
 	    uint8_t isa = ~sa;						\
 	    uint8_t da = ALPHA_8 (d);					\
 	    uint8_t ida = ~da;						\
 	    uint32_t result;						\
 	    uint32_t sc[3], dc[3], c[3];					\
             								\
 	    result = d;							\
 	    UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (result, isa, s, ida);	\
 	    dc[0] = RED_8 (d);						\
 	    sc[0] = RED_8 (s);						\
 	    dc[1] = GREEN_8 (d);					\
 	    sc[1] = GREEN_8 (s);					\
 	    dc[2] = BLUE_8 (d);						\
 	    sc[2] = BLUE_8 (s);						\
 	    blend_ ## name (c, dc, da, sc, sa);				\
             								\
 	    *(dest + i) = result +					\
 		(DIV_ONE_UN8 (sa * (uint32_t)da) << A_SHIFT) +		\
 		(DIV_ONE_UN8 (c[0]) << R_SHIFT) +			\
 		(DIV_ONE_UN8 (c[1]) << G_SHIFT) +			\
 		(DIV_ONE_UN8 (c[2]));					\
 	}								\
     }
 static void
 set_lum (uint32_t dest[3], uint32_t src[3], uint32_t sa, uint32_t lum)
 {
     double a, l, min, max;
     double tmp[3];
     a = sa * (1.0 / MASK);
     l = lum * (1.0 / MASK);
     tmp[0] = src[0] * (1.0 / MASK);
     tmp[1] = src[1] * (1.0 / MASK);
     tmp[2] = src[2] * (1.0 / MASK);
     l = l - LUM (tmp);
     tmp[0] += l;
     tmp[1] += l;
     tmp[2] += l;
     /* clip_color */
     l = LUM (tmp);
     min = CH_MIN (tmp);
     max = CH_MAX (tmp);
     if (min < 0)
     {
 	if (l - min == 0.0)
 	{
 	    tmp[0] = 0;
 	    tmp[1] = 0;
 	    tmp[2] = 0;
 	}
 	else
 	{
 	    tmp[0] = l + (tmp[0] - l) * l / (l - min);
 	    tmp[1] = l + (tmp[1] - l) * l / (l - min);
 	    tmp[2] = l + (tmp[2] - l) * l / (l - min);
 	}
     }
     if (max > a)
     {
 	if (max - l == 0.0)
 	{
 	    tmp[0] = a;
 	    tmp[1] = a;
 	    tmp[2] = a;
 	}
 	else
 	{
 	    tmp[0] = l + (tmp[0] - l) * (a - l) / (max - l);
 	    tmp[1] = l + (tmp[1] - l) * (a - l) / (max - l);
 	    tmp[2] = l + (tmp[2] - l) * (a - l) / (max - l);
 	}
     }
     dest[0] = tmp[0] * MASK + 0.5;
     dest[1] = tmp[1] * MASK + 0.5;
     dest[2] = tmp[2] * MASK + 0.5;
 }
 static void
 set_sat (uint32_t dest[3], uint32_t src[3], uint32_t sat)
 {
     int id[3];
     uint32_t min, max;
     if (src[0] > src[1])
     {
 	if (src[0] > src[2])
 	{
 	    id[0] = 0;
 	    if (src[1] > src[2])
 	    {
 		id[1] = 1;
 		id[2] = 2;
 	    }
 	    else
 	    {
 		id[1] = 2;
 		id[2] = 1;
 	    }
 	}
 	else
 	{
 	    id[0] = 2;
 	    id[1] = 0;
 	    id[2] = 1;
 	}
     }
     else
     {
 	if (src[0] > src[2])
 	{
 	    id[0] = 1;
 	    id[1] = 0;
 	    id[2] = 2;
 	}
 	else
 	{
 	    id[2] = 0;
 	    if (src[1] > src[2])
 	    {
 		id[0] = 1;
 		id[1] = 2;
 	    }
 	    else
 	    {
 		id[0] = 2;
 		id[1] = 1;
 	    }
 	}
     }
     max = dest[id[0]];
     min = dest[id[2]];
     if (max > min)
     {
 	dest[id[1]] = (dest[id[1]] - min) * sat / (max - min);
 	dest[id[0]] = sat;
 	dest[id[2]] = 0;
     }
     else
     {
 	dest[0] = dest[1] = dest[2] = 0;
     }
 }
 /*
  * Hue:
  * B(Cb, Cs) = set_lum (set_sat (Cs, SAT (Cb)), LUM (Cb))
  */
 static inline void
 blend_hsl_hue (uint32_t c[3],
                uint32_t dc[3],
                uint32_t da,
                uint32_t sc[3],
                uint32_t sa)
 {
     c[0] = sc[0] * da;
     c[1] = sc[1] * da;
     c[2] = sc[2] * da;
     set_sat (c, c, SAT (dc) * sa);
     set_lum (c, c, sa * da, LUM (dc) * sa);
 }
 PDF_NON_SEPARABLE_BLEND_MODE (hsl_hue)
 /*
  * Saturation:
  * B(Cb, Cs) = set_lum (set_sat (Cb, SAT (Cs)), LUM (Cb))
  */
 static inline void
 blend_hsl_saturation (uint32_t c[3],
                       uint32_t dc[3],
                       uint32_t da,
                       uint32_t sc[3],
                       uint32_t sa)
 {
     c[0] = dc[0] * sa;
     c[1] = dc[1] * sa;
     c[2] = dc[2] * sa;
     set_sat (c, c, SAT (sc) * da);
     set_lum (c, c, sa * da, LUM (dc) * sa);
 }
 PDF_NON_SEPARABLE_BLEND_MODE (hsl_saturation)
 /*
  * Color:
  * B(Cb, Cs) = set_lum (Cs, LUM (Cb))
  */
 static inline void
 blend_hsl_color (uint32_t c[3],
                  uint32_t dc[3],
                  uint32_t da,
                  uint32_t sc[3],
                  uint32_t sa)
 {
     c[0] = sc[0] * da;
     c[1] = sc[1] * da;
     c[2] = sc[2] * da;
     set_lum (c, c, sa * da, LUM (dc) * sa);
 }
 PDF_NON_SEPARABLE_BLEND_MODE (hsl_color)
 /*
  * Luminosity:
  * B(Cb, Cs) = set_lum (Cb, LUM (Cs))
  */
 static inline void
 blend_hsl_luminosity (uint32_t c[3],
                       uint32_t dc[3],
                       uint32_t da,
                       uint32_t sc[3],
                       uint32_t sa)
 {
     c[0] = dc[0] * sa;
     c[1] = dc[1] * sa;
     c[2] = dc[2] * sa;
     set_lum (c, c, sa * da, LUM (sc) * da);
 }
 PDF_NON_SEPARABLE_BLEND_MODE (hsl_luminosity)
 #undef SAT
 #undef LUM
 #undef CH_MAX
 #undef CH_MIN
 #undef PDF_NON_SEPARABLE_BLEND_MODE
 /* All of the disjoint/conjoint composing functions
  *
  * The four entries in the first column indicate what source contributions
  * come from each of the four areas of the picture -- areas covered by neither
  * A nor B, areas covered only by A, areas covered only by B and finally
  * areas covered by both A and B.
  *
  * Disjoint			Conjoint
  * Fa		Fb		Fa		Fb
  * (0,0,0,0)	0		0		0		0
  * (0,A,0,A)	1		0		1		0
  * (0,0,B,B)	0		1		0		1
  * (0,A,B,A)	1		min((1-a)/b,1)	1		max(1-a/b,0)
  * (0,A,B,B)	min((1-b)/a,1)	1		max(1-b/a,0)	1
  * (0,0,0,A)	max(1-(1-b)/a,0) 0		min(1,b/a)	0
  * (0,0,0,B)	0		max(1-(1-a)/b,0) 0		min(a/b,1)
  * (0,A,0,0)	min(1,(1-b)/a)	0		max(1-b/a,0)	0
  * (0,0,B,0)	0		min(1,(1-a)/b)	0		max(1-a/b,0)
  * (0,0,B,A)	max(1-(1-b)/a,0) min(1,(1-a)/b)	 min(1,b/a)	max(1-a/b,0)
  * (0,A,0,B)	min(1,(1-b)/a)	max(1-(1-a)/b,0) max(1-b/a,0)	min(1,a/b)
  * (0,A,B,0)	min(1,(1-b)/a)	min(1,(1-a)/b)	max(1-b/a,0)	max(1-a/b,0)
  *
  * See  http://marc.info/?l=xfree-render&m=99792000027857&w=2  for more
  * information about these operators.
  */
 #define COMBINE_A_OUT 1
 #define COMBINE_A_IN  2
 #define COMBINE_B_OUT 4
 #define COMBINE_B_IN  8
 #define COMBINE_CLEAR   0
 #define COMBINE_A       (COMBINE_A_OUT | COMBINE_A_IN)
 #define COMBINE_B       (COMBINE_B_OUT | COMBINE_B_IN)
 #define COMBINE_A_OVER  (COMBINE_A_OUT | COMBINE_B_OUT | COMBINE_A_IN)
 #define COMBINE_B_OVER  (COMBINE_A_OUT | COMBINE_B_OUT | COMBINE_B_IN)
 #define COMBINE_A_ATOP  (COMBINE_B_OUT | COMBINE_A_IN)
 #define COMBINE_B_ATOP  (COMBINE_A_OUT | COMBINE_B_IN)
 #define COMBINE_XOR     (COMBINE_A_OUT | COMBINE_B_OUT)
 /* portion covered by a but not b */
 static uint8_t
 combine_disjoint_out_part (uint8_t a, uint8_t b)
 {
     /* min (1, (1-b) / a) */
     b = ~b;                 /* 1 - b */
     if (b >= a)             /* 1 - b >= a -> (1-b)/a >= 1 */
 	return MASK;        /* 1 */
     return DIV_UN8 (b, a);     /* (1-b) / a */
 }
 /* portion covered by both a and b */
 static uint8_t
 combine_disjoint_in_part (uint8_t a, uint8_t b)
 {
     /* max (1-(1-b)/a,0) */
     /*  = - min ((1-b)/a - 1, 0) */
     /*  = 1 - min (1, (1-b)/a) */
     b = ~b;                 /* 1 - b */
     if (b >= a)             /* 1 - b >= a -> (1-b)/a >= 1 */
 	return 0;           /* 1 - 1 */
     return ~DIV_UN8(b, a);    /* 1 - (1-b) / a */
 }
 /* portion covered by a but not b */
 static uint8_t
 combine_conjoint_out_part (uint8_t a, uint8_t b)
 {
     /* max (1-b/a,0) */
     /* = 1-min(b/a,1) */
     /* min (1, (1-b) / a) */
     if (b >= a)             /* b >= a -> b/a >= 1 */
 	return 0x00;        /* 0 */
     return ~DIV_UN8(b, a);    /* 1 - b/a */
 }
 /* portion covered by both a and b */
 static uint8_t
 combine_conjoint_in_part (uint8_t a, uint8_t b)
 {
     /* min (1,b/a) */
     if (b >= a)             /* b >= a -> b/a >= 1 */
 	return MASK;        /* 1 */
     return DIV_UN8 (b, a);     /* b/a */
 }
 #define GET_COMP(v, i)   ((uint16_t) (uint8_t) ((v) >> i))
 #define ADD(x, y, i, t)							\
     ((t) = GET_COMP (x, i) + GET_COMP (y, i),				\
      (uint32_t) ((uint8_t) ((t) | (0 - ((t) >> G_SHIFT)))) << (i))
 #define GENERIC(x, y, i, ax, ay, t, u, v)				\
     ((t) = (MUL_UN8 (GET_COMP (y, i), ay, (u)) +			\
             MUL_UN8 (GET_COMP (x, i), ax, (v))),			\
      (uint32_t) ((uint8_t) ((t) |					\
                            (0 - ((t) >> G_SHIFT)))) << (i))
 static void
 combine_disjoint_general_u (uint32_t *      dest,
                             const uint32_t *src,
                             const uint32_t *mask,
                             int            width,
                             uint8_t        combine)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t m, n, o, p;
 	uint16_t Fa, Fb, t, u, v;
 	uint8_t sa = s >> A_SHIFT;
 	uint8_t da = d >> A_SHIFT;
 	switch (combine & COMBINE_A)
 	{
 	default:
 	    Fa = 0;
 	    break;
 	case COMBINE_A_OUT:
 	    Fa = combine_disjoint_out_part (sa, da);
 	    break;
 	case COMBINE_A_IN:
 	    Fa = combine_disjoint_in_part (sa, da);
 	    break;
 	case COMBINE_A:
 	    Fa = MASK;
 	    break;
 	}
 	switch (combine & COMBINE_B)
 	{
 	default:
 	    Fb = 0;
 	    break;
 	case COMBINE_B_OUT:
 	    Fb = combine_disjoint_out_part (da, sa);
 	    break;
 	case COMBINE_B_IN:
 	    Fb = combine_disjoint_in_part (da, sa);
 	    break;
 	case COMBINE_B:
 	    Fb = MASK;
 	    break;
 	}
 	m = GENERIC (s, d, 0, Fa, Fb, t, u, v);
 	n = GENERIC (s, d, G_SHIFT, Fa, Fb, t, u, v);
 	o = GENERIC (s, d, R_SHIFT, Fa, Fb, t, u, v);
 	p = GENERIC (s, d, A_SHIFT, Fa, Fb, t, u, v);
 	s = m | n | o | p;
 	*(dest + i) = s;
     }
 }
 static void
 combine_disjoint_over_u (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint16_t a = s >> A_SHIFT;
 	if (s != 0x00)
 	{
 	    uint32_t d = *(dest + i);
 	    a = combine_disjoint_out_part (d >> A_SHIFT, a);
 	    UN8x4_MUL_UN8_ADD_UN8x4 (d, a, s);
 	    *(dest + i) = d;
 	}
     }
 }
 static void
 combine_disjoint_in_u (pixman_implementation_t *imp,
                        pixman_op_t              op,
                        uint32_t *                dest,
                        const uint32_t *          src,
                        const uint32_t *          mask,
                        int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_A_IN);
 }
 static void
 combine_disjoint_in_reverse_u (pixman_implementation_t *imp,
                                pixman_op_t              op,
                                uint32_t *                dest,
                                const uint32_t *          src,
                                const uint32_t *          mask,
                                int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_B_IN);
 }
 static void
 combine_disjoint_out_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_A_OUT);
 }
 static void
 combine_disjoint_out_reverse_u (pixman_implementation_t *imp,
                                 pixman_op_t              op,
                                 uint32_t *                dest,
                                 const uint32_t *          src,
                                 const uint32_t *          mask,
                                 int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_B_OUT);
 }
 static void
 combine_disjoint_atop_u (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_A_ATOP);
 }
 static void
 combine_disjoint_atop_reverse_u (pixman_implementation_t *imp,
                                  pixman_op_t              op,
                                  uint32_t *                dest,
                                  const uint32_t *          src,
                                  const uint32_t *          mask,
                                  int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_B_ATOP);
 }
 static void
 combine_disjoint_xor_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_disjoint_general_u (dest, src, mask, width, COMBINE_XOR);
 }
 static void
 combine_conjoint_general_u (uint32_t *      dest,
                             const uint32_t *src,
                             const uint32_t *mask,
                             int            width,
                             uint8_t        combine)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = combine_mask (src, mask, i);
 	uint32_t d = *(dest + i);
 	uint32_t m, n, o, p;
 	uint16_t Fa, Fb, t, u, v;
 	uint8_t sa = s >> A_SHIFT;
 	uint8_t da = d >> A_SHIFT;
 	switch (combine & COMBINE_A)
 	{
 	default:
 	    Fa = 0;
 	    break;
 	case COMBINE_A_OUT:
 	    Fa = combine_conjoint_out_part (sa, da);
 	    break;
 	case COMBINE_A_IN:
 	    Fa = combine_conjoint_in_part (sa, da);
 	    break;
 	case COMBINE_A:
 	    Fa = MASK;
 	    break;
 	}
 	switch (combine & COMBINE_B)
 	{
 	default:
 	    Fb = 0;
 	    break;
 	case COMBINE_B_OUT:
 	    Fb = combine_conjoint_out_part (da, sa);
 	    break;
 	case COMBINE_B_IN:
 	    Fb = combine_conjoint_in_part (da, sa);
 	    break;
 	case COMBINE_B:
 	    Fb = MASK;
 	    break;
 	}
 	m = GENERIC (s, d, 0, Fa, Fb, t, u, v);
 	n = GENERIC (s, d, G_SHIFT, Fa, Fb, t, u, v);
 	o = GENERIC (s, d, R_SHIFT, Fa, Fb, t, u, v);
 	p = GENERIC (s, d, A_SHIFT, Fa, Fb, t, u, v);
 	s = m | n | o | p;
 	*(dest + i) = s;
     }
 }
 static void
 combine_conjoint_over_u (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_A_OVER);
 }
 static void
 combine_conjoint_over_reverse_u (pixman_implementation_t *imp,
                                  pixman_op_t              op,
                                  uint32_t *                dest,
                                  const uint32_t *          src,
                                  const uint32_t *          mask,
                                  int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_B_OVER);
 }
 static void
 combine_conjoint_in_u (pixman_implementation_t *imp,
                        pixman_op_t              op,
                        uint32_t *                dest,
                        const uint32_t *          src,
                        const uint32_t *          mask,
                        int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_A_IN);
 }
 static void
 combine_conjoint_in_reverse_u (pixman_implementation_t *imp,
                                pixman_op_t              op,
                                uint32_t *                dest,
                                const uint32_t *          src,
                                const uint32_t *          mask,
                                int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_B_IN);
 }
 static void
 combine_conjoint_out_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_A_OUT);
 }
 static void
 combine_conjoint_out_reverse_u (pixman_implementation_t *imp,
                                 pixman_op_t              op,
                                 uint32_t *                dest,
                                 const uint32_t *          src,
                                 const uint32_t *          mask,
                                 int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_B_OUT);
 }
 static void
 combine_conjoint_atop_u (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_A_ATOP);
 }
 static void
 combine_conjoint_atop_reverse_u (pixman_implementation_t *imp,
                                  pixman_op_t              op,
                                  uint32_t *                dest,
                                  const uint32_t *          src,
                                  const uint32_t *          mask,
                                  int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_B_ATOP);
 }
 static void
 combine_conjoint_xor_u (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_conjoint_general_u (dest, src, mask, width, COMBINE_XOR);
 }
 /* Component alpha combiners */
 static void
 combine_clear_ca (pixman_implementation_t *imp,
                   pixman_op_t              op,
                   uint32_t *                dest,
                   const uint32_t *          src,
                   const uint32_t *          mask,
                   int                      width)
 {
     memset (dest, 0, width * sizeof(uint32_t));
 }
 static void
 combine_src_ca (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	combine_mask_value_ca (&s, &m);
 	*(dest + i) = s;
     }
 }
 static void
 combine_over_ca (pixman_implementation_t *imp,
                  pixman_op_t              op,
                  uint32_t *                dest,
                  const uint32_t *          src,
                  const uint32_t *          mask,
                  int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t a;
 	combine_mask_ca (&s, &m);
 	a = ~m;
 	if (a)
 	{
 	    uint32_t d = *(dest + i);
 	    UN8x4_MUL_UN8x4_ADD_UN8x4 (d, a, s);
 	    s = d;
 	}
 	*(dest + i) = s;
     }
 }
 static void
 combine_over_reverse_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint32_t a = ~d >> A_SHIFT;
 	if (a)
 	{
 	    uint32_t s = *(src + i);
 	    uint32_t m = *(mask + i);
 	    UN8x4_MUL_UN8x4 (s, m);
 	    UN8x4_MUL_UN8_ADD_UN8x4 (s, a, d);
 	    *(dest + i) = s;
 	}
     }
 }
 static void
 combine_in_ca (pixman_implementation_t *imp,
                pixman_op_t              op,
                uint32_t *                dest,
                const uint32_t *          src,
                const uint32_t *          mask,
                int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint16_t a = d >> A_SHIFT;
 	uint32_t s = 0;
 	if (a)
 	{
 	    uint32_t m = *(mask + i);
 	    s = *(src + i);
 	    combine_mask_value_ca (&s, &m);
 	    if (a != MASK)
 		UN8x4_MUL_UN8 (s, a);
 	}
 	*(dest + i) = s;
     }
 }
 static void
 combine_in_reverse_ca (pixman_implementation_t *imp,
                        pixman_op_t              op,
                        uint32_t *                dest,
                        const uint32_t *          src,
                        const uint32_t *          mask,
                        int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t a;
 	combine_mask_alpha_ca (&s, &m);
 	a = m;
 	if (a != ~0)
 	{
 	    uint32_t d = 0;
 	    if (a)
 	    {
 		d = *(dest + i);
 		UN8x4_MUL_UN8x4 (d, a);
 	    }
 	    *(dest + i) = d;
 	}
     }
 }
 static void
 combine_out_ca (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint16_t a = ~d >> A_SHIFT;
 	uint32_t s = 0;
 	if (a)
 	{
 	    uint32_t m = *(mask + i);
 	    s = *(src + i);
 	    combine_mask_value_ca (&s, &m);
 	    if (a != MASK)
 		UN8x4_MUL_UN8 (s, a);
 	}
 	*(dest + i) = s;
     }
 }
 static void
 combine_out_reverse_ca (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t a;
 	combine_mask_alpha_ca (&s, &m);
 	a = ~m;
 	if (a != ~0)
 	{
 	    uint32_t d = 0;
 	    if (a)
 	    {
 		d = *(dest + i);
 		UN8x4_MUL_UN8x4 (d, a);
 	    }
 	    *(dest + i) = d;
 	}
     }
 }
 static void
 combine_atop_ca (pixman_implementation_t *imp,
                  pixman_op_t              op,
                  uint32_t *                dest,
                  const uint32_t *          src,
                  const uint32_t *          mask,
                  int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t ad;
 	uint16_t as = d >> A_SHIFT;
 	combine_mask_ca (&s, &m);
 	ad = ~m;
 	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as);
 	*(dest + i) = d;
     }
 }
 static void
 combine_atop_reverse_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t ad;
 	uint16_t as = ~d >> A_SHIFT;
 	combine_mask_ca (&s, &m);
 	ad = m;
 	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as);
 	*(dest + i) = d;
     }
 }
 static void
 combine_xor_ca (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t d = *(dest + i);
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t ad;
 	uint16_t as = ~d >> A_SHIFT;
 	combine_mask_ca (&s, &m);
 	ad = ~m;
 	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as);
 	*(dest + i) = d;
     }
 }
 static void
 combine_add_ca (pixman_implementation_t *imp,
                 pixman_op_t              op,
                 uint32_t *                dest,
                 const uint32_t *          src,
                 const uint32_t *          mask,
                 int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s = *(src + i);
 	uint32_t m = *(mask + i);
 	uint32_t d = *(dest + i);
 	combine_mask_value_ca (&s, &m);
 	UN8x4_ADD_UN8x4 (d, s);
 	*(dest + i) = d;
     }
 }
 static void
 combine_saturate_ca (pixman_implementation_t *imp,
                      pixman_op_t              op,
                      uint32_t *                dest,
                      const uint32_t *          src,
                      const uint32_t *          mask,
                      int                      width)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s, d;
 	uint16_t sa, sr, sg, sb, da;
 	uint16_t t, u, v;
 	uint32_t m, n, o, p;
 	d = *(dest + i);
 	s = *(src + i);
 	m = *(mask + i);
 	combine_mask_ca (&s, &m);
 	sa = (m >> A_SHIFT);
 	sr = (m >> R_SHIFT) & MASK;
 	sg = (m >> G_SHIFT) & MASK;
 	sb =  m             & MASK;
 	da = ~d >> A_SHIFT;
 	if (sb <= da)
 	    m = ADD (s, d, 0, t);
 	else
 	    m = GENERIC (s, d, 0, (da << G_SHIFT) / sb, MASK, t, u, v);
 	if (sg <= da)
 	    n = ADD (s, d, G_SHIFT, t);
 	else
 	    n = GENERIC (s, d, G_SHIFT, (da << G_SHIFT) / sg, MASK, t, u, v);
 	if (sr <= da)
 	    o = ADD (s, d, R_SHIFT, t);
 	else
 	    o = GENERIC (s, d, R_SHIFT, (da << G_SHIFT) / sr, MASK, t, u, v);
 	if (sa <= da)
 	    p = ADD (s, d, A_SHIFT, t);
 	else
 	    p = GENERIC (s, d, A_SHIFT, (da << G_SHIFT) / sa, MASK, t, u, v);
 	*(dest + i) = m | n | o | p;
     }
 }
 static void
 combine_disjoint_general_ca (uint32_t *      dest,
                              const uint32_t *src,
                              const uint32_t *mask,
                              int            width,
                              uint8_t        combine)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s, d;
 	uint32_t m, n, o, p;
 	uint32_t Fa, Fb;
 	uint16_t t, u, v;
 	uint32_t sa;
 	uint8_t da;
 	s = *(src + i);
 	m = *(mask + i);
 	d = *(dest + i);
 	da = d >> A_SHIFT;
 	combine_mask_ca (&s, &m);
 	sa = m;
 	switch (combine & COMBINE_A)
 	{
 	default:
 	    Fa = 0;
 	    break;
 	case COMBINE_A_OUT:
 	    m = (uint32_t)combine_disjoint_out_part ((uint8_t) (sa >> 0), da);
 	    n = (uint32_t)combine_disjoint_out_part ((uint8_t) (sa >> G_SHIFT), da) << G_SHIFT;
 	    o = (uint32_t)combine_disjoint_out_part ((uint8_t) (sa >> R_SHIFT), da) << R_SHIFT;
 	    p = (uint32_t)combine_disjoint_out_part ((uint8_t) (sa >> A_SHIFT), da) << A_SHIFT;
 	    Fa = m | n | o | p;
 	    break;
 	case COMBINE_A_IN:
 	    m = (uint32_t)combine_disjoint_in_part ((uint8_t) (sa >> 0), da);
 	    n = (uint32_t)combine_disjoint_in_part ((uint8_t) (sa >> G_SHIFT), da) << G_SHIFT;
 	    o = (uint32_t)combine_disjoint_in_part ((uint8_t) (sa >> R_SHIFT), da) << R_SHIFT;
 	    p = (uint32_t)combine_disjoint_in_part ((uint8_t) (sa >> A_SHIFT), da) << A_SHIFT;
 	    Fa = m | n | o | p;
 	    break;
 	case COMBINE_A:
 	    Fa = ~0;
 	    break;
 	}
 	switch (combine & COMBINE_B)
 	{
 	default:
 	    Fb = 0;
 	    break;
 	case COMBINE_B_OUT:
 	    m = (uint32_t)combine_disjoint_out_part (da, (uint8_t) (sa >> 0));
 	    n = (uint32_t)combine_disjoint_out_part (da, (uint8_t) (sa >> G_SHIFT)) << G_SHIFT;
 	    o = (uint32_t)combine_disjoint_out_part (da, (uint8_t) (sa >> R_SHIFT)) << R_SHIFT;
 	    p = (uint32_t)combine_disjoint_out_part (da, (uint8_t) (sa >> A_SHIFT)) << A_SHIFT;
 	    Fb = m | n | o | p;
 	    break;
 	case COMBINE_B_IN:
 	    m = (uint32_t)combine_disjoint_in_part (da, (uint8_t) (sa >> 0));
 	    n = (uint32_t)combine_disjoint_in_part (da, (uint8_t) (sa >> G_SHIFT)) << G_SHIFT;
 	    o = (uint32_t)combine_disjoint_in_part (da, (uint8_t) (sa >> R_SHIFT)) << R_SHIFT;
 	    p = (uint32_t)combine_disjoint_in_part (da, (uint8_t) (sa >> A_SHIFT)) << A_SHIFT;
 	    Fb = m | n | o | p;
 	    break;
 	case COMBINE_B:
 	    Fb = ~0;
 	    break;
 	}
 	m = GENERIC (s, d, 0, GET_COMP (Fa, 0), GET_COMP (Fb, 0), t, u, v);
 	n = GENERIC (s, d, G_SHIFT, GET_COMP (Fa, G_SHIFT), GET_COMP (Fb, G_SHIFT), t, u, v);
 	o = GENERIC (s, d, R_SHIFT, GET_COMP (Fa, R_SHIFT), GET_COMP (Fb, R_SHIFT), t, u, v);
 	p = GENERIC (s, d, A_SHIFT, GET_COMP (Fa, A_SHIFT), GET_COMP (Fb, A_SHIFT), t, u, v);
 	s = m | n | o | p;
 	*(dest + i) = s;
     }
 }
 static void
 combine_disjoint_over_ca (pixman_implementation_t *imp,
                           pixman_op_t              op,
                           uint32_t *                dest,
                           const uint32_t *          src,
                           const uint32_t *          mask,
                           int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_A_OVER);
 }
 static void
 combine_disjoint_in_ca (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_A_IN);
 }
 static void
 combine_disjoint_in_reverse_ca (pixman_implementation_t *imp,
                                 pixman_op_t              op,
                                 uint32_t *                dest,
                                 const uint32_t *          src,
                                 const uint32_t *          mask,
                                 int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_B_IN);
 }
 static void
 combine_disjoint_out_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_A_OUT);
 }
 static void
 combine_disjoint_out_reverse_ca (pixman_implementation_t *imp,
                                  pixman_op_t              op,
                                  uint32_t *                dest,
                                  const uint32_t *          src,
                                  const uint32_t *          mask,
                                  int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_B_OUT);
 }
 static void
 combine_disjoint_atop_ca (pixman_implementation_t *imp,
                           pixman_op_t              op,
                           uint32_t *                dest,
                           const uint32_t *          src,
                           const uint32_t *          mask,
                           int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_A_ATOP);
 }
 static void
 combine_disjoint_atop_reverse_ca (pixman_implementation_t *imp,
                                   pixman_op_t              op,
                                   uint32_t *                dest,
                                   const uint32_t *          src,
                                   const uint32_t *          mask,
                                   int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_B_ATOP);
 }
 static void
 combine_disjoint_xor_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_disjoint_general_ca (dest, src, mask, width, COMBINE_XOR);
 }
 static void
 combine_conjoint_general_ca (uint32_t *      dest,
                              const uint32_t *src,
                              const uint32_t *mask,
                              int            width,
                              uint8_t        combine)
 {
     int i;
     for (i = 0; i < width; ++i)
     {
 	uint32_t s, d;
 	uint32_t m, n, o, p;
 	uint32_t Fa, Fb;
 	uint16_t t, u, v;
 	uint32_t sa;
 	uint8_t da;
 	s = *(src + i);
 	m = *(mask + i);
 	d = *(dest + i);
 	da = d >> A_SHIFT;
 	combine_mask_ca (&s, &m);
 	sa = m;
 	switch (combine & COMBINE_A)
 	{
 	default:
 	    Fa = 0;
 	    break;
 	case COMBINE_A_OUT:
 	    m = (uint32_t)combine_conjoint_out_part ((uint8_t) (sa >> 0), da);
 	    n = (uint32_t)combine_conjoint_out_part ((uint8_t) (sa >> G_SHIFT), da) << G_SHIFT;
 	    o = (uint32_t)combine_conjoint_out_part ((uint8_t) (sa >> R_SHIFT), da) << R_SHIFT;
 	    p = (uint32_t)combine_conjoint_out_part ((uint8_t) (sa >> A_SHIFT), da) << A_SHIFT;
 	    Fa = m | n | o | p;
 	    break;
 	case COMBINE_A_IN:
 	    m = (uint32_t)combine_conjoint_in_part ((uint8_t) (sa >> 0), da);
 	    n = (uint32_t)combine_conjoint_in_part ((uint8_t) (sa >> G_SHIFT), da) << G_SHIFT;
 	    o = (uint32_t)combine_conjoint_in_part ((uint8_t) (sa >> R_SHIFT), da) << R_SHIFT;
 	    p = (uint32_t)combine_conjoint_in_part ((uint8_t) (sa >> A_SHIFT), da) << A_SHIFT;
 	    Fa = m | n | o | p;
 	    break;
 	case COMBINE_A:
 	    Fa = ~0;
 	    break;
 	}
 	switch (combine & COMBINE_B)
 	{
 	default:
 	    Fb = 0;
 	    break;
 	case COMBINE_B_OUT:
 	    m = (uint32_t)combine_conjoint_out_part (da, (uint8_t) (sa >> 0));
 	    n = (uint32_t)combine_conjoint_out_part (da, (uint8_t) (sa >> G_SHIFT)) << G_SHIFT;
 	    o = (uint32_t)combine_conjoint_out_part (da, (uint8_t) (sa >> R_SHIFT)) << R_SHIFT;
 	    p = (uint32_t)combine_conjoint_out_part (da, (uint8_t) (sa >> A_SHIFT)) << A_SHIFT;
 	    Fb = m | n | o | p;
 	    break;
 	case COMBINE_B_IN:
 	    m = (uint32_t)combine_conjoint_in_part (da, (uint8_t) (sa >> 0));
 	    n = (uint32_t)combine_conjoint_in_part (da, (uint8_t) (sa >> G_SHIFT)) << G_SHIFT;
 	    o = (uint32_t)combine_conjoint_in_part (da, (uint8_t) (sa >> R_SHIFT)) << R_SHIFT;
 	    p = (uint32_t)combine_conjoint_in_part (da, (uint8_t) (sa >> A_SHIFT)) << A_SHIFT;
 	    Fb = m | n | o | p;
 	    break;
 	case COMBINE_B:
 	    Fb = ~0;
 	    break;
 	}
 	m = GENERIC (s, d, 0, GET_COMP (Fa, 0), GET_COMP (Fb, 0), t, u, v);
 	n = GENERIC (s, d, G_SHIFT, GET_COMP (Fa, G_SHIFT), GET_COMP (Fb, G_SHIFT), t, u, v);
 	o = GENERIC (s, d, R_SHIFT, GET_COMP (Fa, R_SHIFT), GET_COMP (Fb, R_SHIFT), t, u, v);
 	p = GENERIC (s, d, A_SHIFT, GET_COMP (Fa, A_SHIFT), GET_COMP (Fb, A_SHIFT), t, u, v);
 	s = m | n | o | p;
 	*(dest + i) = s;
     }
 }
 static void
 combine_conjoint_over_ca (pixman_implementation_t *imp,
                           pixman_op_t              op,
                           uint32_t *                dest,
                           const uint32_t *          src,
                           const uint32_t *          mask,
                           int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_A_OVER);
 }
 static void
 combine_conjoint_over_reverse_ca (pixman_implementation_t *imp,
                                   pixman_op_t              op,
                                   uint32_t *                dest,
                                   const uint32_t *          src,
                                   const uint32_t *          mask,
                                   int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_B_OVER);
 }
 static void
 combine_conjoint_in_ca (pixman_implementation_t *imp,
                         pixman_op_t              op,
                         uint32_t *                dest,
                         const uint32_t *          src,
                         const uint32_t *          mask,
                         int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_A_IN);
 }
 static void
 combine_conjoint_in_reverse_ca (pixman_implementation_t *imp,
                                 pixman_op_t              op,
                                 uint32_t *                dest,
                                 const uint32_t *          src,
                                 const uint32_t *          mask,
                                 int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_B_IN);
 }
 static void
 combine_conjoint_out_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_A_OUT);
 }
 static void
 combine_conjoint_out_reverse_ca (pixman_implementation_t *imp,
                                  pixman_op_t              op,
                                  uint32_t *                dest,
                                  const uint32_t *          src,
                                  const uint32_t *          mask,
                                  int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_B_OUT);
 }
 static void
 combine_conjoint_atop_ca (pixman_implementation_t *imp,
                           pixman_op_t              op,
                           uint32_t *                dest,
                           const uint32_t *          src,
                           const uint32_t *          mask,
                           int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_A_ATOP);
 }
 static void
 combine_conjoint_atop_reverse_ca (pixman_implementation_t *imp,
                                   pixman_op_t              op,
                                   uint32_t *                dest,
                                   const uint32_t *          src,
                                   const uint32_t *          mask,
                                   int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_B_ATOP);
 }
 static void
 combine_conjoint_xor_ca (pixman_implementation_t *imp,
                          pixman_op_t              op,
                          uint32_t *                dest,
                          const uint32_t *          src,
                          const uint32_t *          mask,
                          int                      width)
 {
     combine_conjoint_general_ca (dest, src, mask, width, COMBINE_XOR);
 }
 void
 _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp)
 {
     /* Unified alpha */
     imp->combine_32[PIXMAN_OP_CLEAR] = combine_clear;
     imp->combine_32[PIXMAN_OP_SRC] = combine_src_u;
     imp->combine_32[PIXMAN_OP_DST] = combine_dst;
     imp->combine_32[PIXMAN_OP_OVER] = combine_over_u;
     imp->combine_32[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_u;
     imp->combine_32[PIXMAN_OP_IN] = combine_in_u;
     imp->combine_32[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_u;
     imp->combine_32[PIXMAN_OP_OUT] = combine_out_u;
     imp->combine_32[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_u;
     imp->combine_32[PIXMAN_OP_ATOP] = combine_atop_u;
     imp->combine_32[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_u;
     imp->combine_32[PIXMAN_OP_XOR] = combine_xor_u;
     imp->combine_32[PIXMAN_OP_ADD] = combine_add_u;
     imp->combine_32[PIXMAN_OP_SATURATE] = combine_saturate_u;
     /* Disjoint, unified */
     imp->combine_32[PIXMAN_OP_DISJOINT_CLEAR] = combine_clear;
     imp->combine_32[PIXMAN_OP_DISJOINT_SRC] = combine_src_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_DST] = combine_dst;
     imp->combine_32[PIXMAN_OP_DISJOINT_OVER] = combine_disjoint_over_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_OVER_REVERSE] = combine_saturate_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_IN] = combine_disjoint_in_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_IN_REVERSE] = combine_disjoint_in_reverse_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_OUT] = combine_disjoint_out_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_OUT_REVERSE] = combine_disjoint_out_reverse_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_ATOP] = combine_disjoint_atop_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_ATOP_REVERSE] = combine_disjoint_atop_reverse_u;
     imp->combine_32[PIXMAN_OP_DISJOINT_XOR] = combine_disjoint_xor_u;
     /* Conjoint, unified */
     imp->combine_32[PIXMAN_OP_CONJOINT_CLEAR] = combine_clear;
     imp->combine_32[PIXMAN_OP_CONJOINT_SRC] = combine_src_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_DST] = combine_dst;
     imp->combine_32[PIXMAN_OP_CONJOINT_OVER] = combine_conjoint_over_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_OVER_REVERSE] = combine_conjoint_over_reverse_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_IN] = combine_conjoint_in_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_IN_REVERSE] = combine_conjoint_in_reverse_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_OUT] = combine_conjoint_out_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_OUT_REVERSE] = combine_conjoint_out_reverse_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_ATOP] = combine_conjoint_atop_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_ATOP_REVERSE] = combine_conjoint_atop_reverse_u;
     imp->combine_32[PIXMAN_OP_CONJOINT_XOR] = combine_conjoint_xor_u;
     imp->combine_32[PIXMAN_OP_MULTIPLY] = combine_multiply_u;
     imp->combine_32[PIXMAN_OP_SCREEN] = combine_screen_u;
     imp->combine_32[PIXMAN_OP_OVERLAY] = combine_overlay_u;
     imp->combine_32[PIXMAN_OP_DARKEN] = combine_darken_u;
     imp->combine_32[PIXMAN_OP_LIGHTEN] = combine_lighten_u;
     imp->combine_32[PIXMAN_OP_COLOR_DODGE] = combine_color_dodge_u;
     imp->combine_32[PIXMAN_OP_COLOR_BURN] = combine_color_burn_u;
     imp->combine_32[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_u;
     imp->combine_32[PIXMAN_OP_SOFT_LIGHT] = combine_soft_light_u;
     imp->combine_32[PIXMAN_OP_DIFFERENCE] = combine_difference_u;
     imp->combine_32[PIXMAN_OP_EXCLUSION] = combine_exclusion_u;
     imp->combine_32[PIXMAN_OP_HSL_HUE] = combine_hsl_hue_u;
     imp->combine_32[PIXMAN_OP_HSL_SATURATION] = combine_hsl_saturation_u;
     imp->combine_32[PIXMAN_OP_HSL_COLOR] = combine_hsl_color_u;
     imp->combine_32[PIXMAN_OP_HSL_LUMINOSITY] = combine_hsl_luminosity_u;
     /* Component alpha combiners */
     imp->combine_32_ca[PIXMAN_OP_CLEAR] = combine_clear_ca;
     imp->combine_32_ca[PIXMAN_OP_SRC] = combine_src_ca;
     /* dest */
     imp->combine_32_ca[PIXMAN_OP_OVER] = combine_over_ca;
     imp->combine_32_ca[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_IN] = combine_in_ca;
     imp->combine_32_ca[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_OUT] = combine_out_ca;
     imp->combine_32_ca[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_ATOP] = combine_atop_ca;
     imp->combine_32_ca[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_XOR] = combine_xor_ca;
     imp->combine_32_ca[PIXMAN_OP_ADD] = combine_add_ca;
     imp->combine_32_ca[PIXMAN_OP_SATURATE] = combine_saturate_ca;
     /* Disjoint CA */
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_CLEAR] = combine_clear_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_SRC] = combine_src_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_DST] = combine_dst;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_OVER] = combine_disjoint_over_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_OVER_REVERSE] = combine_saturate_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_IN] = combine_disjoint_in_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_IN_REVERSE] = combine_disjoint_in_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_OUT] = combine_disjoint_out_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_OUT_REVERSE] = combine_disjoint_out_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_ATOP] = combine_disjoint_atop_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_ATOP_REVERSE] = combine_disjoint_atop_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_DISJOINT_XOR] = combine_disjoint_xor_ca;
     /* Conjoint CA */
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_CLEAR] = combine_clear_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_SRC] = combine_src_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_DST] = combine_dst;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_OVER] = combine_conjoint_over_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_OVER_REVERSE] = combine_conjoint_over_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_IN] = combine_conjoint_in_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_IN_REVERSE] = combine_conjoint_in_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_OUT] = combine_conjoint_out_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_OUT_REVERSE] = combine_conjoint_out_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_ATOP] = combine_conjoint_atop_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_ATOP_REVERSE] = combine_conjoint_atop_reverse_ca;
     imp->combine_32_ca[PIXMAN_OP_CONJOINT_XOR] = combine_conjoint_xor_ca;
     imp->combine_32_ca[PIXMAN_OP_MULTIPLY] = combine_multiply_ca;
     imp->combine_32_ca[PIXMAN_OP_SCREEN] = combine_screen_ca;
     imp->combine_32_ca[PIXMAN_OP_OVERLAY] = combine_overlay_ca;
     imp->combine_32_ca[PIXMAN_OP_DARKEN] = combine_darken_ca;
     imp->combine_32_ca[PIXMAN_OP_LIGHTEN] = combine_lighten_ca;
     imp->combine_32_ca[PIXMAN_OP_COLOR_DODGE] = combine_color_dodge_ca;
     imp->combine_32_ca[PIXMAN_OP_COLOR_BURN] = combine_color_burn_ca;
     imp->combine_32_ca[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_ca;
     imp->combine_32_ca[PIXMAN_OP_SOFT_LIGHT] = combine_soft_light_ca;
     imp->combine_32_ca[PIXMAN_OP_DIFFERENCE] = combine_difference_ca;
     imp->combine_32_ca[PIXMAN_OP_EXCLUSION] = combine_exclusion_ca;
     /* It is not clear that these make sense, so make them noops for now */
     imp->combine_32_ca[PIXMAN_OP_HSL_HUE] = combine_dst;
     imp->combine_32_ca[PIXMAN_OP_HSL_SATURATION] = combine_dst;
     imp->combine_32_ca[PIXMAN_OP_HSL_COLOR] = combine_dst;
     imp->combine_32_ca[PIXMAN_OP_HSL_LUMINOSITY] = combine_dst;
 }

The Tor Browser / annotate

gfx/cairo/libpixman/src/pixman-combine32.c@b8a032363ba2 (annotated)

gfx/cairo/libpixman/src/pixman-combine32.c