1019 lines
29 KiB
C
1019 lines
29 KiB
C
/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
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/*
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* Copyright © 2010, 2012 Soren Sandmann Pedersen
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* Copyright © 2010, 2012 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Soren Sandmann Pedersen (sandmann@cs.au.dk)
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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 <float.h>
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#include "pixman-private.h"
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/* Workaround for http://gcc.gnu.org/PR54965 */
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/* GCC 4.6 has problems with force_inline, so just use normal inline instead */
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#if defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 6)
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#undef force_inline
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#define force_inline __inline__
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#endif
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#define IS_ZERO(f) (-FLT_MIN < (f) && (f) < FLT_MIN)
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typedef float (* combine_channel_t) (float sa, float s, float da, float d);
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static force_inline void
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combine_inner (pixman_bool_t component,
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float *dest, const float *src, const float *mask, int n_pixels,
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combine_channel_t combine_a, combine_channel_t combine_c)
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{
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int i;
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if (!mask)
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{
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for (i = 0; i < 4 * n_pixels; i += 4)
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{
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float sa = src[i + 0];
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float sr = src[i + 1];
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float sg = src[i + 2];
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float sb = src[i + 3];
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float da = dest[i + 0];
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float dr = dest[i + 1];
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float dg = dest[i + 2];
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float db = dest[i + 3];
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dest[i + 0] = combine_a (sa, sa, da, da);
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dest[i + 1] = combine_c (sa, sr, da, dr);
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dest[i + 2] = combine_c (sa, sg, da, dg);
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dest[i + 3] = combine_c (sa, sb, da, db);
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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 < 4 * n_pixels; i += 4)
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{
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float sa, sr, sg, sb;
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float ma, mr, mg, mb;
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float da, dr, dg, db;
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sa = src[i + 0];
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sr = src[i + 1];
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sg = src[i + 2];
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sb = src[i + 3];
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if (component)
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{
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ma = mask[i + 0];
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mr = mask[i + 1];
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mg = mask[i + 2];
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mb = mask[i + 3];
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sr *= mr;
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sg *= mg;
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sb *= mb;
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ma *= sa;
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mr *= sa;
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mg *= sa;
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mb *= sa;
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sa = ma;
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}
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else
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{
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ma = mask[i + 0];
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sa *= ma;
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sr *= ma;
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sg *= ma;
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sb *= ma;
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ma = mr = mg = mb = sa;
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}
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da = dest[i + 0];
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dr = dest[i + 1];
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dg = dest[i + 2];
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db = dest[i + 3];
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dest[i + 0] = combine_a (ma, sa, da, da);
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dest[i + 1] = combine_c (mr, sr, da, dr);
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dest[i + 2] = combine_c (mg, sg, da, dg);
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dest[i + 3] = combine_c (mb, sb, da, db);
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}
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}
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}
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#define MAKE_COMBINER(name, component, combine_a, combine_c) \
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static void \
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combine_ ## name ## _float (pixman_implementation_t *imp, \
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pixman_op_t op, \
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float *dest, \
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const float *src, \
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const float *mask, \
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int n_pixels) \
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{ \
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combine_inner (component, dest, src, mask, n_pixels, \
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combine_a, combine_c); \
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}
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#define MAKE_COMBINERS(name, combine_a, combine_c) \
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MAKE_COMBINER(name ## _ca, TRUE, combine_a, combine_c) \
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MAKE_COMBINER(name ## _u, FALSE, combine_a, combine_c)
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/*
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* Porter/Duff operators
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*/
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typedef enum
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{
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ZERO,
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ONE,
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SRC_ALPHA,
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DEST_ALPHA,
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INV_SA,
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INV_DA,
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SA_OVER_DA,
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DA_OVER_SA,
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INV_SA_OVER_DA,
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INV_DA_OVER_SA,
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ONE_MINUS_SA_OVER_DA,
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ONE_MINUS_DA_OVER_SA,
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ONE_MINUS_INV_DA_OVER_SA,
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ONE_MINUS_INV_SA_OVER_DA
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} combine_factor_t;
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#define CLAMP(f) \
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(((f) < 0)? 0 : (((f) > 1.0) ? 1.0 : (f)))
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static force_inline float
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get_factor (combine_factor_t factor, float sa, float da)
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{
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float f = -1;
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switch (factor)
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{
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case ZERO:
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f = 0.0f;
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break;
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case ONE:
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f = 1.0f;
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break;
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case SRC_ALPHA:
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f = sa;
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break;
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case DEST_ALPHA:
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f = da;
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break;
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case INV_SA:
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f = 1 - sa;
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break;
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case INV_DA:
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f = 1 - da;
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break;
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case SA_OVER_DA:
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if (IS_ZERO (da))
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f = 1.0f;
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else
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f = CLAMP (sa / da);
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break;
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case DA_OVER_SA:
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if (IS_ZERO (sa))
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f = 1.0f;
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else
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f = CLAMP (da / sa);
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break;
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case INV_SA_OVER_DA:
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if (IS_ZERO (da))
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f = 1.0f;
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else
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f = CLAMP ((1.0f - sa) / da);
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break;
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case INV_DA_OVER_SA:
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if (IS_ZERO (sa))
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f = 1.0f;
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else
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f = CLAMP ((1.0f - da) / sa);
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break;
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case ONE_MINUS_SA_OVER_DA:
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if (IS_ZERO (da))
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f = 0.0f;
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else
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f = CLAMP (1.0f - sa / da);
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break;
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case ONE_MINUS_DA_OVER_SA:
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if (IS_ZERO (sa))
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f = 0.0f;
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else
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f = CLAMP (1.0f - da / sa);
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break;
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case ONE_MINUS_INV_DA_OVER_SA:
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if (IS_ZERO (sa))
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f = 0.0f;
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else
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f = CLAMP (1.0f - (1.0f - da) / sa);
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break;
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case ONE_MINUS_INV_SA_OVER_DA:
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if (IS_ZERO (da))
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f = 0.0f;
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else
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f = CLAMP (1.0f - (1.0f - sa) / da);
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break;
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}
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return f;
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}
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#define MAKE_PD_COMBINERS(name, a, b) \
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static float force_inline \
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pd_combine_ ## name (float sa, float s, float da, float d) \
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{ \
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const float fa = get_factor (a, sa, da); \
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const float fb = get_factor (b, sa, da); \
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\
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return MIN (1.0f, s * fa + d * fb); \
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} \
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\
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MAKE_COMBINERS(name, pd_combine_ ## name, pd_combine_ ## name)
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MAKE_PD_COMBINERS (clear, ZERO, ZERO)
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MAKE_PD_COMBINERS (src, ONE, ZERO)
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MAKE_PD_COMBINERS (dst, ZERO, ONE)
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MAKE_PD_COMBINERS (over, ONE, INV_SA)
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MAKE_PD_COMBINERS (over_reverse, INV_DA, ONE)
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MAKE_PD_COMBINERS (in, DEST_ALPHA, ZERO)
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MAKE_PD_COMBINERS (in_reverse, ZERO, SRC_ALPHA)
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MAKE_PD_COMBINERS (out, INV_DA, ZERO)
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MAKE_PD_COMBINERS (out_reverse, ZERO, INV_SA)
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MAKE_PD_COMBINERS (atop, DEST_ALPHA, INV_SA)
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MAKE_PD_COMBINERS (atop_reverse, INV_DA, SRC_ALPHA)
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MAKE_PD_COMBINERS (xor, INV_DA, INV_SA)
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MAKE_PD_COMBINERS (add, ONE, ONE)
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MAKE_PD_COMBINERS (saturate, INV_DA_OVER_SA, ONE)
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MAKE_PD_COMBINERS (disjoint_clear, ZERO, ZERO)
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MAKE_PD_COMBINERS (disjoint_src, ONE, ZERO)
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MAKE_PD_COMBINERS (disjoint_dst, ZERO, ONE)
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MAKE_PD_COMBINERS (disjoint_over, ONE, INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (disjoint_over_reverse, INV_DA_OVER_SA, ONE)
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MAKE_PD_COMBINERS (disjoint_in, ONE_MINUS_INV_DA_OVER_SA, ZERO)
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MAKE_PD_COMBINERS (disjoint_in_reverse, ZERO, ONE_MINUS_INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (disjoint_out, INV_DA_OVER_SA, ZERO)
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MAKE_PD_COMBINERS (disjoint_out_reverse, ZERO, INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (disjoint_atop, ONE_MINUS_INV_DA_OVER_SA, INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (disjoint_atop_reverse, INV_DA_OVER_SA, ONE_MINUS_INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (disjoint_xor, INV_DA_OVER_SA, INV_SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_clear, ZERO, ZERO)
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MAKE_PD_COMBINERS (conjoint_src, ONE, ZERO)
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MAKE_PD_COMBINERS (conjoint_dst, ZERO, ONE)
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MAKE_PD_COMBINERS (conjoint_over, ONE, ONE_MINUS_SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_over_reverse, ONE_MINUS_DA_OVER_SA, ONE)
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MAKE_PD_COMBINERS (conjoint_in, DA_OVER_SA, ZERO)
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MAKE_PD_COMBINERS (conjoint_in_reverse, ZERO, SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_out, ONE_MINUS_DA_OVER_SA, ZERO)
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MAKE_PD_COMBINERS (conjoint_out_reverse, ZERO, ONE_MINUS_SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_atop, DA_OVER_SA, ONE_MINUS_SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_atop_reverse, ONE_MINUS_DA_OVER_SA, SA_OVER_DA)
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MAKE_PD_COMBINERS (conjoint_xor, ONE_MINUS_DA_OVER_SA, ONE_MINUS_SA_OVER_DA)
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/*
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* PDF blend modes:
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*
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* The following blend modes have been taken from the PDF ISO 32000
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* specification, which at this point in time is available from
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* http://www.adobe.com/devnet/acrobat/pdfs/PDF32000_2008.pdf
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* The relevant chapters are 11.3.5 and 11.3.6.
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* The formula for computing the final pixel color given in 11.3.6 is:
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* αr × Cr = (1 – αs) × αb × Cb + (1 – αb) × αs × Cs + αb × αs × B(Cb, Cs)
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* with B() being the blend function.
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* Note that OVER is a special case of this operation, using B(Cb, Cs) = Cs
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*
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* These blend modes should match the SVG filter draft specification, as
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* it has been designed to mirror ISO 32000. Note that at the current point
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* no released draft exists that shows this, as the formulas have not been
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* updated yet after the release of ISO 32000.
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*
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* The default implementation here uses the PDF_SEPARABLE_BLEND_MODE and
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* PDF_NON_SEPARABLE_BLEND_MODE macros, which take the blend function as an
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* argument. Note that this implementation operates on premultiplied colors,
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* while the PDF specification does not. Therefore the code uses the formula
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* ar.Cra = (1 – as) . Dca + (1 – ad) . Sca + B(Dca, ad, Sca, as)
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*/
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#define MAKE_SEPARABLE_PDF_COMBINERS(name) \
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static force_inline float \
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combine_ ## name ## _a (float sa, float s, float da, float d) \
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{ \
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return da + sa - da * sa; \
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} \
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\
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static force_inline float \
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combine_ ## name ## _c (float sa, float s, float da, float d) \
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{ \
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float f = (1 - sa) * d + (1 - da) * s; \
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\
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return f + blend_ ## name (sa, s, da, d); \
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} \
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\
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MAKE_COMBINERS (name, combine_ ## name ## _a, combine_ ## name ## _c)
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static force_inline float
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blend_multiply (float sa, float s, float da, float d)
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{
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return d * s;
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}
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static force_inline float
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blend_screen (float sa, float s, float da, float d)
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{
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return d * sa + s * da - s * d;
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}
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static force_inline float
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blend_overlay (float sa, float s, float da, float d)
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{
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if (2 * d < da)
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return 2 * s * d;
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else
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return sa * da - 2 * (da - d) * (sa - s);
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}
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static force_inline float
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blend_darken (float sa, float s, float da, float d)
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{
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s = s * da;
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d = d * sa;
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if (s > d)
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return d;
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else
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return s;
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}
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static force_inline float
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blend_lighten (float sa, float s, float da, float d)
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{
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s = s * da;
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d = d * sa;
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|
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if (s > d)
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return s;
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||
else
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||
return d;
|
||
}
|
||
|
||
static force_inline float
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||
blend_color_dodge (float sa, float s, float da, float d)
|
||
{
|
||
if (IS_ZERO (d))
|
||
return 0.0f;
|
||
else if (d * sa >= sa * da - s * da)
|
||
return sa * da;
|
||
else if (IS_ZERO (sa - s))
|
||
return sa * da;
|
||
else
|
||
return sa * sa * d / (sa - s);
|
||
}
|
||
|
||
static force_inline float
|
||
blend_color_burn (float sa, float s, float da, float d)
|
||
{
|
||
if (d >= da)
|
||
return sa * da;
|
||
else if (sa * (da - d) >= s * da)
|
||
return 0.0f;
|
||
else if (IS_ZERO (s))
|
||
return 0.0f;
|
||
else
|
||
return sa * (da - sa * (da - d) / s);
|
||
}
|
||
|
||
static force_inline float
|
||
blend_hard_light (float sa, float s, float da, float d)
|
||
{
|
||
if (2 * s < sa)
|
||
return 2 * s * d;
|
||
else
|
||
return sa * da - 2 * (da - d) * (sa - s);
|
||
}
|
||
|
||
static force_inline float
|
||
blend_soft_light (float sa, float s, float da, float d)
|
||
{
|
||
if (2 * s < sa)
|
||
{
|
||
if (IS_ZERO (da))
|
||
return d * sa;
|
||
else
|
||
return d * sa - d * (da - d) * (sa - 2 * s) / da;
|
||
}
|
||
else
|
||
{
|
||
if (IS_ZERO (da))
|
||
{
|
||
return 0.0f;
|
||
}
|
||
else
|
||
{
|
||
if (4 * d <= da)
|
||
return d * sa + (2 * s - sa) * d * ((16 * d / da - 12) * d / da + 3);
|
||
else
|
||
return d * sa + (sqrtf (d * da) - d) * (2 * s - sa);
|
||
}
|
||
}
|
||
}
|
||
|
||
static force_inline float
|
||
blend_difference (float sa, float s, float da, float d)
|
||
{
|
||
float dsa = d * sa;
|
||
float sda = s * da;
|
||
|
||
if (sda < dsa)
|
||
return dsa - sda;
|
||
else
|
||
return sda - dsa;
|
||
}
|
||
|
||
static force_inline float
|
||
blend_exclusion (float sa, float s, float da, float d)
|
||
{
|
||
return s * da + d * sa - 2 * d * s;
|
||
}
|
||
|
||
MAKE_SEPARABLE_PDF_COMBINERS (multiply)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (screen)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (overlay)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (darken)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (lighten)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (color_dodge)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (color_burn)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (hard_light)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (soft_light)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (difference)
|
||
MAKE_SEPARABLE_PDF_COMBINERS (exclusion)
|
||
|
||
/*
|
||
* PDF nonseperable blend modes.
|
||
*
|
||
* These 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 - LUM (r × 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 they 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)
|
||
*
|
||
*/
|
||
|
||
typedef struct
|
||
{
|
||
float r;
|
||
float g;
|
||
float b;
|
||
} rgb_t;
|
||
|
||
static force_inline float
|
||
minf (float a, float b)
|
||
{
|
||
return a < b? a : b;
|
||
}
|
||
|
||
static force_inline float
|
||
maxf (float a, float b)
|
||
{
|
||
return a > b? a : b;
|
||
}
|
||
|
||
static force_inline float
|
||
channel_min (const rgb_t *c)
|
||
{
|
||
return minf (minf (c->r, c->g), c->b);
|
||
}
|
||
|
||
static force_inline float
|
||
channel_max (const rgb_t *c)
|
||
{
|
||
return maxf (maxf (c->r, c->g), c->b);
|
||
}
|
||
|
||
static force_inline float
|
||
get_lum (const rgb_t *c)
|
||
{
|
||
return c->r * 0.3f + c->g * 0.59f + c->b * 0.11f;
|
||
}
|
||
|
||
static force_inline float
|
||
get_sat (const rgb_t *c)
|
||
{
|
||
return channel_max (c) - channel_min (c);
|
||
}
|
||
|
||
static void
|
||
clip_color (rgb_t *color, float a)
|
||
{
|
||
float l = get_lum (color);
|
||
float n = channel_min (color);
|
||
float x = channel_max (color);
|
||
float t;
|
||
|
||
if (n < 0.0f)
|
||
{
|
||
t = l - n;
|
||
if (IS_ZERO (t))
|
||
{
|
||
color->r = 0.0f;
|
||
color->g = 0.0f;
|
||
color->b = 0.0f;
|
||
}
|
||
else
|
||
{
|
||
color->r = l + (((color->r - l) * l) / t);
|
||
color->g = l + (((color->g - l) * l) / t);
|
||
color->b = l + (((color->b - l) * l) / t);
|
||
}
|
||
}
|
||
if (x > a)
|
||
{
|
||
t = x - l;
|
||
if (IS_ZERO (t))
|
||
{
|
||
color->r = a;
|
||
color->g = a;
|
||
color->b = a;
|
||
}
|
||
else
|
||
{
|
||
color->r = l + (((color->r - l) * (a - l) / t));
|
||
color->g = l + (((color->g - l) * (a - l) / t));
|
||
color->b = l + (((color->b - l) * (a - l) / t));
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_lum (rgb_t *color, float sa, float l)
|
||
{
|
||
float d = l - get_lum (color);
|
||
|
||
color->r = color->r + d;
|
||
color->g = color->g + d;
|
||
color->b = color->b + d;
|
||
|
||
clip_color (color, sa);
|
||
}
|
||
|
||
static void
|
||
set_sat (rgb_t *src, float sat)
|
||
{
|
||
float *max, *mid, *min;
|
||
float t;
|
||
|
||
if (src->r > src->g)
|
||
{
|
||
if (src->r > src->b)
|
||
{
|
||
max = &(src->r);
|
||
|
||
if (src->g > src->b)
|
||
{
|
||
mid = &(src->g);
|
||
min = &(src->b);
|
||
}
|
||
else
|
||
{
|
||
mid = &(src->b);
|
||
min = &(src->g);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
max = &(src->b);
|
||
mid = &(src->r);
|
||
min = &(src->g);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (src->r > src->b)
|
||
{
|
||
max = &(src->g);
|
||
mid = &(src->r);
|
||
min = &(src->b);
|
||
}
|
||
else
|
||
{
|
||
min = &(src->r);
|
||
|
||
if (src->g > src->b)
|
||
{
|
||
max = &(src->g);
|
||
mid = &(src->b);
|
||
}
|
||
else
|
||
{
|
||
max = &(src->b);
|
||
mid = &(src->g);
|
||
}
|
||
}
|
||
}
|
||
|
||
t = *max - *min;
|
||
|
||
if (IS_ZERO (t))
|
||
{
|
||
*mid = *max = 0.0f;
|
||
}
|
||
else
|
||
{
|
||
*mid = ((*mid - *min) * sat) / t;
|
||
*max = sat;
|
||
}
|
||
|
||
*min = 0.0f;
|
||
}
|
||
|
||
/*
|
||
* Hue:
|
||
* B(Cb, Cs) = set_lum (set_sat (Cs, SAT (Cb)), LUM (Cb))
|
||
*/
|
||
static force_inline void
|
||
blend_hsl_hue (rgb_t *res,
|
||
const rgb_t *dest, float da,
|
||
const rgb_t *src, float sa)
|
||
{
|
||
res->r = src->r * da;
|
||
res->g = src->g * da;
|
||
res->b = src->b * da;
|
||
|
||
set_sat (res, get_sat (dest) * sa);
|
||
set_lum (res, sa * da, get_lum (dest) * sa);
|
||
}
|
||
|
||
/*
|
||
* Saturation:
|
||
* B(Cb, Cs) = set_lum (set_sat (Cb, SAT (Cs)), LUM (Cb))
|
||
*/
|
||
static force_inline void
|
||
blend_hsl_saturation (rgb_t *res,
|
||
const rgb_t *dest, float da,
|
||
const rgb_t *src, float sa)
|
||
{
|
||
res->r = dest->r * sa;
|
||
res->g = dest->g * sa;
|
||
res->b = dest->b * sa;
|
||
|
||
set_sat (res, get_sat (src) * da);
|
||
set_lum (res, sa * da, get_lum (dest) * sa);
|
||
}
|
||
|
||
/*
|
||
* Color:
|
||
* B(Cb, Cs) = set_lum (Cs, LUM (Cb))
|
||
*/
|
||
static force_inline void
|
||
blend_hsl_color (rgb_t *res,
|
||
const rgb_t *dest, float da,
|
||
const rgb_t *src, float sa)
|
||
{
|
||
res->r = src->r * da;
|
||
res->g = src->g * da;
|
||
res->b = src->b * da;
|
||
|
||
set_lum (res, sa * da, get_lum (dest) * sa);
|
||
}
|
||
|
||
/*
|
||
* Luminosity:
|
||
* B(Cb, Cs) = set_lum (Cb, LUM (Cs))
|
||
*/
|
||
static force_inline void
|
||
blend_hsl_luminosity (rgb_t *res,
|
||
const rgb_t *dest, float da,
|
||
const rgb_t *src, float sa)
|
||
{
|
||
res->r = dest->r * sa;
|
||
res->g = dest->g * sa;
|
||
res->b = dest->b * sa;
|
||
|
||
set_lum (res, sa * da, get_lum (src) * da);
|
||
}
|
||
|
||
#define MAKE_NON_SEPARABLE_PDF_COMBINERS(name) \
|
||
static void \
|
||
combine_ ## name ## _u_float (pixman_implementation_t *imp, \
|
||
pixman_op_t op, \
|
||
float *dest, \
|
||
const float *src, \
|
||
const float *mask, \
|
||
int n_pixels) \
|
||
{ \
|
||
int i; \
|
||
\
|
||
for (i = 0; i < 4 * n_pixels; i += 4) \
|
||
{ \
|
||
float sa, da; \
|
||
rgb_t sc, dc, rc; \
|
||
\
|
||
sa = src[i + 0]; \
|
||
sc.r = src[i + 1]; \
|
||
sc.g = src[i + 2]; \
|
||
sc.b = src[i + 3]; \
|
||
\
|
||
da = dest[i + 0]; \
|
||
dc.r = dest[i + 1]; \
|
||
dc.g = dest[i + 2]; \
|
||
dc.b = dest[i + 3]; \
|
||
\
|
||
if (mask) \
|
||
{ \
|
||
float ma = mask[i + 0]; \
|
||
\
|
||
/* Component alpha is not supported for HSL modes */ \
|
||
sa *= ma; \
|
||
sc.r *= ma; \
|
||
sc.g *= ma; \
|
||
sc.g *= ma; \
|
||
} \
|
||
\
|
||
blend_ ## name (&rc, &dc, da, &sc, sa); \
|
||
\
|
||
dest[i + 0] = sa + da - sa * da; \
|
||
dest[i + 1] = (1 - sa) * dc.r + (1 - da) * sc.r + rc.r; \
|
||
dest[i + 2] = (1 - sa) * dc.g + (1 - da) * sc.g + rc.g; \
|
||
dest[i + 3] = (1 - sa) * dc.b + (1 - da) * sc.b + rc.b; \
|
||
} \
|
||
}
|
||
|
||
MAKE_NON_SEPARABLE_PDF_COMBINERS(hsl_hue)
|
||
MAKE_NON_SEPARABLE_PDF_COMBINERS(hsl_saturation)
|
||
MAKE_NON_SEPARABLE_PDF_COMBINERS(hsl_color)
|
||
MAKE_NON_SEPARABLE_PDF_COMBINERS(hsl_luminosity)
|
||
|
||
void
|
||
_pixman_setup_combiner_functions_float (pixman_implementation_t *imp)
|
||
{
|
||
/* Unified alpha */
|
||
imp->combine_float[PIXMAN_OP_CLEAR] = combine_clear_u_float;
|
||
imp->combine_float[PIXMAN_OP_SRC] = combine_src_u_float;
|
||
imp->combine_float[PIXMAN_OP_DST] = combine_dst_u_float;
|
||
imp->combine_float[PIXMAN_OP_OVER] = combine_over_u_float;
|
||
imp->combine_float[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_IN] = combine_in_u_float;
|
||
imp->combine_float[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_OUT] = combine_out_u_float;
|
||
imp->combine_float[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_ATOP] = combine_atop_u_float;
|
||
imp->combine_float[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_XOR] = combine_xor_u_float;
|
||
imp->combine_float[PIXMAN_OP_ADD] = combine_add_u_float;
|
||
imp->combine_float[PIXMAN_OP_SATURATE] = combine_saturate_u_float;
|
||
|
||
/* Disjoint, unified */
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_CLEAR] = combine_disjoint_clear_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_SRC] = combine_disjoint_src_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_DST] = combine_disjoint_dst_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_OVER] = combine_disjoint_over_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_OVER_REVERSE] = combine_disjoint_over_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_IN] = combine_disjoint_in_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_IN_REVERSE] = combine_disjoint_in_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_OUT] = combine_disjoint_out_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_OUT_REVERSE] = combine_disjoint_out_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_ATOP] = combine_disjoint_atop_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_ATOP_REVERSE] = combine_disjoint_atop_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_DISJOINT_XOR] = combine_disjoint_xor_u_float;
|
||
|
||
/* Conjoint, unified */
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_CLEAR] = combine_conjoint_clear_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_SRC] = combine_conjoint_src_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_DST] = combine_conjoint_dst_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_OVER] = combine_conjoint_over_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_OVER_REVERSE] = combine_conjoint_over_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_IN] = combine_conjoint_in_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_IN_REVERSE] = combine_conjoint_in_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_OUT] = combine_conjoint_out_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_OUT_REVERSE] = combine_conjoint_out_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_ATOP] = combine_conjoint_atop_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_ATOP_REVERSE] = combine_conjoint_atop_reverse_u_float;
|
||
imp->combine_float[PIXMAN_OP_CONJOINT_XOR] = combine_conjoint_xor_u_float;
|
||
|
||
/* PDF operators, unified */
|
||
imp->combine_float[PIXMAN_OP_MULTIPLY] = combine_multiply_u_float;
|
||
imp->combine_float[PIXMAN_OP_SCREEN] = combine_screen_u_float;
|
||
imp->combine_float[PIXMAN_OP_OVERLAY] = combine_overlay_u_float;
|
||
imp->combine_float[PIXMAN_OP_DARKEN] = combine_darken_u_float;
|
||
imp->combine_float[PIXMAN_OP_LIGHTEN] = combine_lighten_u_float;
|
||
imp->combine_float[PIXMAN_OP_COLOR_DODGE] = combine_color_dodge_u_float;
|
||
imp->combine_float[PIXMAN_OP_COLOR_BURN] = combine_color_burn_u_float;
|
||
imp->combine_float[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_u_float;
|
||
imp->combine_float[PIXMAN_OP_SOFT_LIGHT] = combine_soft_light_u_float;
|
||
imp->combine_float[PIXMAN_OP_DIFFERENCE] = combine_difference_u_float;
|
||
imp->combine_float[PIXMAN_OP_EXCLUSION] = combine_exclusion_u_float;
|
||
|
||
imp->combine_float[PIXMAN_OP_HSL_HUE] = combine_hsl_hue_u_float;
|
||
imp->combine_float[PIXMAN_OP_HSL_SATURATION] = combine_hsl_saturation_u_float;
|
||
imp->combine_float[PIXMAN_OP_HSL_COLOR] = combine_hsl_color_u_float;
|
||
imp->combine_float[PIXMAN_OP_HSL_LUMINOSITY] = combine_hsl_luminosity_u_float;
|
||
|
||
/* Component alpha combiners */
|
||
imp->combine_float_ca[PIXMAN_OP_CLEAR] = combine_clear_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_SRC] = combine_src_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DST] = combine_dst_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_OVER] = combine_over_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_IN] = combine_in_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_OUT] = combine_out_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_ATOP] = combine_atop_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_XOR] = combine_xor_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_ADD] = combine_add_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_SATURATE] = combine_saturate_ca_float;
|
||
|
||
/* Disjoint CA */
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_CLEAR] = combine_disjoint_clear_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_SRC] = combine_disjoint_src_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_DST] = combine_disjoint_dst_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_OVER] = combine_disjoint_over_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_OVER_REVERSE] = combine_disjoint_over_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_IN] = combine_disjoint_in_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_IN_REVERSE] = combine_disjoint_in_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_OUT] = combine_disjoint_out_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_OUT_REVERSE] = combine_disjoint_out_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_ATOP] = combine_disjoint_atop_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_ATOP_REVERSE] = combine_disjoint_atop_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DISJOINT_XOR] = combine_disjoint_xor_ca_float;
|
||
|
||
/* Conjoint CA */
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_CLEAR] = combine_conjoint_clear_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_SRC] = combine_conjoint_src_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_DST] = combine_conjoint_dst_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_OVER] = combine_conjoint_over_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_OVER_REVERSE] = combine_conjoint_over_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_IN] = combine_conjoint_in_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_IN_REVERSE] = combine_conjoint_in_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_OUT] = combine_conjoint_out_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_OUT_REVERSE] = combine_conjoint_out_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_ATOP] = combine_conjoint_atop_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_ATOP_REVERSE] = combine_conjoint_atop_reverse_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_CONJOINT_XOR] = combine_conjoint_xor_ca_float;
|
||
|
||
/* PDF operators CA */
|
||
imp->combine_float_ca[PIXMAN_OP_MULTIPLY] = combine_multiply_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_SCREEN] = combine_screen_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_OVERLAY] = combine_overlay_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DARKEN] = combine_darken_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_LIGHTEN] = combine_lighten_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_COLOR_DODGE] = combine_color_dodge_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_COLOR_BURN] = combine_color_burn_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_SOFT_LIGHT] = combine_soft_light_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_DIFFERENCE] = combine_difference_ca_float;
|
||
imp->combine_float_ca[PIXMAN_OP_EXCLUSION] = combine_exclusion_ca_float;
|
||
|
||
/* It is not clear that these make sense, so make them noops for now */
|
||
imp->combine_float_ca[PIXMAN_OP_HSL_HUE] = combine_dst_u_float;
|
||
imp->combine_float_ca[PIXMAN_OP_HSL_SATURATION] = combine_dst_u_float;
|
||
imp->combine_float_ca[PIXMAN_OP_HSL_COLOR] = combine_dst_u_float;
|
||
imp->combine_float_ca[PIXMAN_OP_HSL_LUMINOSITY] = combine_dst_u_float;
|
||
}
|