tor-browser

pixman-combine32.c (29525B)

---

/*
* 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 <pixman-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;
   }
}

/*
* 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/pdf/pdf_reference.html
*
* The specific documents of interest are the PDF spec itself:
*
*     http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf
*
* chapters 11.3.5 and 11.3.6 and a later supplement for Adobe Acrobat
* 9.1 and Reader 9.1:
*
*     http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/adobe_supplement_iso32000_1.pdf
*
* that clarifies the specifications for blend modes ColorDodge and
* ColorBurn.
*
* 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() is the blend function. When B(Cb, Cs) = Cs, this formula
* reduces to the regular OVER operator.
*
* Cs and Cb are not premultiplied, so in our implementation we instead
* use:
*
*     cr = (1 – αs) × cb  +  (1 – αb) × cs  +  αb × αs × B (cb/αb, cs/αs)
*
* where cr, cs, and cb are premultiplied colors, and where the
*
*     αb × αs × B(cb/αb, cs/αs)
*
* part is first arithmetically simplified under the assumption that αb
* and αs are not 0, and then updated to produce a meaningful result when
* they are.
*
* For all the blend mode operators, the alpha channel is given by
*
*     αr = αs + αb + αb × αs
*/

/*
* Multiply
*
*      ad * as * B(d / ad, s / as)
*    = ad * as * d/ad * s/as
*    = d * s
*
*/
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 CLAMP(v, low, high)						\
   do									\
   {									\
if (v < (low))							\
    v = (low);							\
if (v > (high))							\
    v = (high);							\
   } while (0)

#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 ra, rr, rg, rb;					\
    								\
    ra = da * 0xff + sa * 0xff - sa * da;			\
    rr = isa * RED_8 (d) + ida * RED_8 (s);			\
    rg = isa * GREEN_8 (d) + ida * GREEN_8 (s);			\
    rb = isa * BLUE_8 (d) + ida * BLUE_8 (s);			\
								\
    rr += blend_ ## name (RED_8 (d), da, RED_8 (s), sa);	\
    rg += blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), sa);    \
    rb += blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), sa);	\
                                                                       \
    CLAMP (ra, 0, 255 * 255);				        \
    CLAMP (rr, 0, 255 * 255);				        \
    CLAMP (rg, 0, 255 * 255);				        \
    CLAMP (rb, 0, 255 * 255);				        \
								\
    ra = DIV_ONE_UN8 (ra);					\
    rr = DIV_ONE_UN8 (rr);					\
    rg = DIV_ONE_UN8 (rg);					\
    rb = DIV_ONE_UN8 (rb);					\
								\
    *(dest + i) = ra << 24 | rr << 16 | rg << 8 | rb;		\
}								\
   }									\
   									\
   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 ra, rr, rg, rb;					\
    uint8_t ira, iga, iba;					\
    								\
    combine_mask_ca (&s, &m);					\
    								\
    ira = ~RED_8 (m);						\
    iga = ~GREEN_8 (m);						\
    iba = ~BLUE_8 (m);						\
								\
    ra = da * 0xff + ALPHA_8 (s) * 0xff - ALPHA_8 (s) * da;	\
    rr = ira * RED_8 (d) + ida * RED_8 (s);			\
    rg = iga * GREEN_8 (d) + ida * GREEN_8 (s);			\
    rb = iba * BLUE_8 (d) + ida * BLUE_8 (s);			\
								\
    rr += blend_ ## name (RED_8 (d), da, RED_8 (s), RED_8 (m));	\
    rg += blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), GREEN_8 (m)); \
    rb += blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), BLUE_8 (m)); \
								\
    CLAMP (ra, 0, 255 * 255);				        \
    CLAMP (rr, 0, 255 * 255);				        \
    CLAMP (rg, 0, 255 * 255);				        \
    CLAMP (rb, 0, 255 * 255);				        \
								\
    ra = DIV_ONE_UN8 (ra);					\
    rr = DIV_ONE_UN8 (rr);					\
    rg = DIV_ONE_UN8 (rg);					\
    rb = DIV_ONE_UN8 (rb);					\
								\
    *(dest + i) = ra << 24 | rr << 16 | rg << 8 | rb;		\
}								\
   }

/*
* Screen
*
*      ad * as * B(d/ad, s/as)
*    = ad * as * (d/ad + s/as - s/as * d/ad)
*    = ad * s + as * d - s * d
*/
static inline int32_t
blend_screen (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   return s * ad + d * as - s * d;
}

PDF_SEPARABLE_BLEND_MODE (screen)

/*
* Overlay
*
*     ad * as * B(d/ad, s/as)
*   = ad * as * Hardlight (s, d)
*   = if (d / ad < 0.5)
*         as * ad * Multiply (s/as, 2 * d/ad)
*     else
*         as * ad * Screen (s/as, 2 * d / ad - 1)
*   = if (d < 0.5 * ad)
*         as * ad * s/as * 2 * d /ad
*     else
*         as * ad * (s/as + 2 * d / ad - 1 - s / as * (2 * d / ad - 1))
*   = if (2 * d < ad)
*         2 * s * d
*     else
*         ad * s + 2 * as * d - as * ad - ad * s * (2 * d / ad - 1)
*   = if (2 * d < ad)
*         2 * s * d
*     else
*         as * ad - 2 * (ad - d) * (as - s)
*/
static inline int32_t
blend_overlay (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   uint32_t r;

   if (2 * d < ad)
r = 2 * s * d;
   else
r = as * ad - 2 * (ad - d) * (as - s);

   return r;
}

PDF_SEPARABLE_BLEND_MODE (overlay)

/*
* Darken
*
*     ad * as * B(d/ad, s/as)
*   = ad * as * MIN(d/ad, s/as)
*   = MIN (as * d, ad * s)
*/
static inline int32_t
blend_darken (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   s = ad * s;
   d = as * d;

   return s > d ? d : s;
}

PDF_SEPARABLE_BLEND_MODE (darken)

/*
* Lighten
*
*     ad * as * B(d/ad, s/as)
*   = ad * as * MAX(d/ad, s/as)
*   = MAX (as * d, ad * s)
*/
static inline int32_t
blend_lighten (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   s = ad * s;
   d = as * d;
   
   return s > d ? s : d;
}

PDF_SEPARABLE_BLEND_MODE (lighten)

/*
* Hard light
*
*     ad * as * B(d/ad, s/as)
*   = if (s/as <= 0.5)
*         ad * as * Multiply (d/ad, 2 * s/as)
*     else
*         ad * as * Screen (d/ad, 2 * s/as - 1)
*   = if 2 * s <= as
*         ad * as * d/ad * 2 * s / as
*     else
*         ad * as * (d/ad + (2 * s/as - 1) + d/ad * (2 * s/as - 1))
*   = if 2 * s <= as
*         2 * s * d
*     else
*         as * ad - 2 * (ad - d) * (as - s)
*/
static inline int32_t
blend_hard_light (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   if (2 * s < as)
return 2 * s * d;
   else
return as * ad - 2 * (ad - d) * (as - s);
}

PDF_SEPARABLE_BLEND_MODE (hard_light)

/*
* Difference
*
*     ad * as * B(s/as, d/ad)
*   = ad * as * abs (s/as - d/ad)
*   = if (s/as <= d/ad)
*         ad * as * (d/ad - s/as)
*     else
*         ad * as * (s/as - d/ad)
*   = if (ad * s <= as * d)
*        as * d - ad * s
*     else
*        ad * s - as * d
*/
static inline int32_t
blend_difference (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   int32_t das = d * as;
   int32_t sad = s * ad;

   if (sad < das)
return das - sad;
   else
return sad - das;
}

PDF_SEPARABLE_BLEND_MODE (difference)

/*
* Exclusion
*
*     ad * as * B(s/as, d/ad)
*   = ad * as * (d/ad + s/as - 2 * d/ad * s/as)
*   = as * d + ad * s - 2 * s * d
*/

/* This can be made faster by writing it directly and not using
* PDF_SEPARABLE_BLEND_MODE, but that's a performance optimization */

static inline int32_t
blend_exclusion (int32_t d, int32_t ad, int32_t s, int32_t as)
{
   return s * ad + d * as - 2 * d * s;
}

PDF_SEPARABLE_BLEND_MODE (exclusion)

#undef PDF_SEPARABLE_BLEND_MODE

/* 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;
   }
}

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_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_HARD_LIGHT] = combine_hard_light_u;
   imp->combine_32[PIXMAN_OP_DIFFERENCE] = combine_difference_u;
   imp->combine_32[PIXMAN_OP_EXCLUSION] = combine_exclusion_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_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_HARD_LIGHT] = combine_hard_light_ca;
   imp->combine_32_ca[PIXMAN_OP_DIFFERENCE] = combine_difference_ca;
   imp->combine_32_ca[PIXMAN_OP_EXCLUSION] = combine_exclusion_ca;
}