1189 lines
29 KiB
C
1189 lines
29 KiB
C
/*
|
||
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
|
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* 2005 Lars Knoll & Zack Rusin, Trolltech
|
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
|
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* documentation for any purpose is hereby granted without fee, provided that
|
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* the above copyright notice appear in all copies and that both that
|
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* copyright notice and this permission notice appear in supporting
|
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* 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
|
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* representations about the suitability of this software for any purpose. It
|
||
* is provided "as is" without express or implied warranty.
|
||
*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
|
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
|
||
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
|
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* SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <math.h>
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#include <string.h>
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#include "pixman-private.h"
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#include "pixman-combine32.h"
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/* component alpha helper functions */
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static void
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combine_mask_ca (uint32_t *src, uint32_t *mask)
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{
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uint32_t a = *mask;
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uint32_t x;
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uint16_t xa;
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if (!a)
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{
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*(src) = 0;
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return;
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}
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x = *(src);
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if (a == ~0)
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{
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x = x >> A_SHIFT;
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x |= x << G_SHIFT;
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x |= x << R_SHIFT;
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*(mask) = x;
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return;
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}
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xa = x >> A_SHIFT;
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UN8x4_MUL_UN8x4 (x, a);
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*(src) = x;
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UN8x4_MUL_UN8 (a, xa);
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*(mask) = a;
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}
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static void
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combine_mask_value_ca (uint32_t *src, const uint32_t *mask)
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{
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uint32_t a = *mask;
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uint32_t x;
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||
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if (!a)
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{
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*(src) = 0;
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return;
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}
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if (a == ~0)
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return;
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x = *(src);
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UN8x4_MUL_UN8x4 (x, a);
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*(src) = x;
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}
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static void
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combine_mask_alpha_ca (const uint32_t *src, uint32_t *mask)
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{
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uint32_t a = *(mask);
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uint32_t x;
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if (!a)
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return;
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x = *(src) >> A_SHIFT;
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if (x == MASK)
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return;
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if (a == ~0)
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{
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x |= x << G_SHIFT;
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x |= x << R_SHIFT;
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*(mask) = x;
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return;
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}
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UN8x4_MUL_UN8 (a, x);
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*(mask) = a;
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}
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/*
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* There are two ways of handling alpha -- either as a single unified value or
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* a separate value for each component, hence each macro must have two
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* versions. The unified alpha version has a 'u' at the end of the name,
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* the component version has a 'ca'. Similarly, functions which deal with
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* this difference will have two versions using the same convention.
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*/
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static force_inline uint32_t
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combine_mask (const uint32_t *src, const uint32_t *mask, int i)
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{
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uint32_t s, m;
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if (mask)
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{
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m = *(mask + i) >> A_SHIFT;
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if (!m)
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return 0;
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}
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s = *(src + i);
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if (mask)
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UN8x4_MUL_UN8 (s, m);
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return s;
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}
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static void
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combine_clear (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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memset (dest, 0, width * sizeof (uint32_t));
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}
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static void
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combine_dst (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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return;
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}
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static void
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combine_src_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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int i;
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||
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if (!mask)
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{
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memcpy (dest, src, width * sizeof (uint32_t));
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}
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else
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{
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for (i = 0; i < width; ++i)
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{
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uint32_t s = combine_mask (src, mask, i);
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*(dest + i) = s;
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}
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}
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}
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||
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static void
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combine_over_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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int i;
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|
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if (!mask)
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{
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for (i = 0; i < width; ++i)
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{
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||
uint32_t s = *(src + i);
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uint32_t a = ALPHA_8 (s);
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if (a == 0xFF)
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{
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*(dest + i) = s;
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}
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else if (s)
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{
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uint32_t d = *(dest + i);
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uint32_t ia = a ^ 0xFF;
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UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s);
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*(dest + i) = d;
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}
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}
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}
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else
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{
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for (i = 0; i < width; ++i)
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{
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uint32_t m = ALPHA_8 (*(mask + i));
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if (m == 0xFF)
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||
{
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||
uint32_t s = *(src + i);
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uint32_t a = ALPHA_8 (s);
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||
if (a == 0xFF)
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{
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*(dest + i) = s;
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}
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else if (s)
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{
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uint32_t d = *(dest + i);
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uint32_t ia = a ^ 0xFF;
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UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s);
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*(dest + i) = d;
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}
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||
}
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else if (m)
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||
{
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||
uint32_t s = *(src + i);
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||
if (s)
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||
{
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uint32_t d = *(dest + i);
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UN8x4_MUL_UN8 (s, m);
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UN8x4_MUL_UN8_ADD_UN8x4 (d, ALPHA_8 (~s), s);
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*(dest + i) = d;
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}
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}
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}
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}
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}
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static void
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combine_over_reverse_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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||
int width)
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||
{
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int i;
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||
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for (i = 0; i < width; ++i)
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{
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uint32_t s = combine_mask (src, mask, i);
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uint32_t d = *(dest + i);
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uint32_t ia = ALPHA_8 (~*(dest + i));
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UN8x4_MUL_UN8_ADD_UN8x4 (s, ia, d);
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*(dest + i) = s;
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}
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}
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static void
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combine_in_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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||
{
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int i;
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||
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for (i = 0; i < width; ++i)
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{
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uint32_t s = combine_mask (src, mask, i);
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uint32_t a = ALPHA_8 (*(dest + i));
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UN8x4_MUL_UN8 (s, a);
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*(dest + i) = s;
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}
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}
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static void
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combine_in_reverse_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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int i;
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for (i = 0; i < width; ++i)
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{
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uint32_t s = combine_mask (src, mask, i);
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uint32_t d = *(dest + i);
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uint32_t a = ALPHA_8 (s);
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UN8x4_MUL_UN8 (d, a);
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*(dest + i) = d;
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}
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}
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static void
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combine_out_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
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int width)
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{
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int i;
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|
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for (i = 0; i < width; ++i)
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{
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uint32_t s = combine_mask (src, mask, i);
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uint32_t a = ALPHA_8 (~*(dest + i));
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UN8x4_MUL_UN8 (s, a);
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*(dest + i) = s;
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}
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}
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static void
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combine_out_reverse_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
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const uint32_t * src,
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const uint32_t * mask,
|
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int width)
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{
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int i;
|
||
|
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for (i = 0; i < width; ++i)
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{
|
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uint32_t s = combine_mask (src, mask, i);
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uint32_t d = *(dest + i);
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uint32_t a = ALPHA_8 (~s);
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UN8x4_MUL_UN8 (d, a);
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*(dest + i) = d;
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}
|
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}
|
||
|
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static void
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combine_atop_u (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * dest,
|
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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);
|
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uint32_t src_ia = ALPHA_8 (~s);
|
||
|
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UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_a, d, src_ia);
|
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*(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;
|
||
}
|