--- /dev/null
+/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
+/*
+ * Copyright © 2010, 2012 Soren Sandmann Pedersen
+ * Copyright © 2010, 2012 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Soren Sandmann Pedersen (sandmann@cs.au.dk)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <math.h>
+#include <string.h>
+#include <float.h>
+
+#include "pixman-private.h"
+
+/* Workaround for http://gcc.gnu.org/PR54965 */
+/* GCC 4.6 has problems with force_inline, so just use normal inline instead */
+#if defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 6)
+#undef force_inline
+#define force_inline __inline__
+#endif
+
+typedef float (* combine_channel_t) (float sa, float s, float da, float d);
+
+static force_inline void
+combine_inner (pixman_bool_t component,
+ float *dest, const float *src, const float *mask, int n_pixels,
+ combine_channel_t combine_a, combine_channel_t combine_c)
+{
+ int i;
+
+ if (!mask)
+ {
+ for (i = 0; i < 4 * n_pixels; i += 4)
+ {
+ float sa = src[i + 0];
+ float sr = src[i + 1];
+ float sg = src[i + 2];
+ float sb = src[i + 3];
+
+ float da = dest[i + 0];
+ float dr = dest[i + 1];
+ float dg = dest[i + 2];
+ float db = dest[i + 3];
+
+ dest[i + 0] = combine_a (sa, sa, da, da);
+ dest[i + 1] = combine_c (sa, sr, da, dr);
+ dest[i + 2] = combine_c (sa, sg, da, dg);
+ dest[i + 3] = combine_c (sa, sb, da, db);
+ }
+ }
+ else
+ {
+ for (i = 0; i < 4 * n_pixels; i += 4)
+ {
+ float sa, sr, sg, sb;
+ float ma, mr, mg, mb;
+ float da, dr, dg, db;
+
+ sa = src[i + 0];
+ sr = src[i + 1];
+ sg = src[i + 2];
+ sb = src[i + 3];
+
+ if (component)
+ {
+ ma = mask[i + 0];
+ mr = mask[i + 1];
+ mg = mask[i + 2];
+ mb = mask[i + 3];
+
+ sr *= mr;
+ sg *= mg;
+ sb *= mb;
+
+ ma *= sa;
+ mr *= sa;
+ mg *= sa;
+ mb *= sa;
+
+ sa = ma;
+ }
+ else
+ {
+ ma = mask[i + 0];
+
+ sa *= ma;
+ sr *= ma;
+ sg *= ma;
+ sb *= ma;
+
+ ma = mr = mg = mb = sa;
+ }
+
+ da = dest[i + 0];
+ dr = dest[i + 1];
+ dg = dest[i + 2];
+ db = dest[i + 3];
+
+ dest[i + 0] = combine_a (ma, sa, da, da);
+ dest[i + 1] = combine_c (mr, sr, da, dr);
+ dest[i + 2] = combine_c (mg, sg, da, dg);
+ dest[i + 3] = combine_c (mb, sb, da, db);
+ }
+ }
+}
+
+#define MAKE_COMBINER(name, component, combine_a, combine_c) \
+ static void \
+ combine_ ## name ## _float (pixman_implementation_t *imp, \
+ pixman_op_t op, \
+ float *dest, \
+ const float *src, \
+ const float *mask, \
+ int n_pixels) \
+ { \
+ combine_inner (component, dest, src, mask, n_pixels, \
+ combine_a, combine_c); \
+ }
+
+#define MAKE_COMBINERS(name, combine_a, combine_c) \
+ MAKE_COMBINER(name ## _ca, TRUE, combine_a, combine_c) \
+ MAKE_COMBINER(name ## _u, FALSE, combine_a, combine_c)
+
+
+/*
+ * Porter/Duff operators
+ */
+typedef enum
+{
+ ZERO,
+ ONE,
+ SRC_ALPHA,
+ DEST_ALPHA,
+ INV_SA,
+ INV_DA,
+ SA_OVER_DA,
+ DA_OVER_SA,
+ INV_SA_OVER_DA,
+ INV_DA_OVER_SA,
+ ONE_MINUS_SA_OVER_DA,
+ ONE_MINUS_DA_OVER_SA,
+ ONE_MINUS_INV_DA_OVER_SA,
+ ONE_MINUS_INV_SA_OVER_DA
+} combine_factor_t;
+
+#define CLAMP(f) \
+ (((f) < 0)? 0 : (((f) > 1.0) ? 1.0 : (f)))
+
+static force_inline float
+get_factor (combine_factor_t factor, float sa, float da)
+{
+ float f = -1;
+
+ switch (factor)
+ {
+ case ZERO:
+ f = 0.0f;
+ break;
+
+ case ONE:
+ f = 1.0f;
+ break;
+
+ case SRC_ALPHA:
+ f = sa;
+ break;
+
+ case DEST_ALPHA:
+ f = da;
+ break;
+
+ case INV_SA:
+ f = 1 - sa;
+ break;
+
+ case INV_DA:
+ f = 1 - da;
+ break;
+
+ case SA_OVER_DA:
+ if (FLOAT_IS_ZERO (da))
+ f = 1.0f;
+ else
+ f = CLAMP (sa / da);
+ break;
+
+ case DA_OVER_SA:
+ if (FLOAT_IS_ZERO (sa))
+ f = 1.0f;
+ else
+ f = CLAMP (da / sa);
+ break;
+
+ case INV_SA_OVER_DA:
+ if (FLOAT_IS_ZERO (da))
+ f = 1.0f;
+ else
+ f = CLAMP ((1.0f - sa) / da);
+ break;
+
+ case INV_DA_OVER_SA:
+ if (FLOAT_IS_ZERO (sa))
+ f = 1.0f;
+ else
+ f = CLAMP ((1.0f - da) / sa);
+ break;
+
+ case ONE_MINUS_SA_OVER_DA:
+ if (FLOAT_IS_ZERO (da))
+ f = 0.0f;
+ else
+ f = CLAMP (1.0f - sa / da);
+ break;
+
+ case ONE_MINUS_DA_OVER_SA:
+ if (FLOAT_IS_ZERO (sa))
+ f = 0.0f;
+ else
+ f = CLAMP (1.0f - da / sa);
+ break;
+
+ case ONE_MINUS_INV_DA_OVER_SA:
+ if (FLOAT_IS_ZERO (sa))
+ f = 0.0f;
+ else
+ f = CLAMP (1.0f - (1.0f - da) / sa);
+ break;
+
+ case ONE_MINUS_INV_SA_OVER_DA:
+ if (FLOAT_IS_ZERO (da))
+ f = 0.0f;
+ else
+ f = CLAMP (1.0f - (1.0f - sa) / da);
+ break;
+ }
+
+ return f;
+}
+
+#define MAKE_PD_COMBINERS(name, a, b) \
+ static float force_inline \
+ pd_combine_ ## name (float sa, float s, float da, float d) \
+ { \
+ const float fa = get_factor (a, sa, da); \
+ const float fb = get_factor (b, sa, da); \
+ \
+ return MIN (1.0f, s * fa + d * fb); \
+ } \
+ \
+ MAKE_COMBINERS(name, pd_combine_ ## name, pd_combine_ ## name)
+
+MAKE_PD_COMBINERS (clear, ZERO, ZERO)
+MAKE_PD_COMBINERS (src, ONE, ZERO)
+MAKE_PD_COMBINERS (dst, ZERO, ONE)
+MAKE_PD_COMBINERS (over, ONE, INV_SA)
+MAKE_PD_COMBINERS (over_reverse, INV_DA, ONE)
+MAKE_PD_COMBINERS (in, DEST_ALPHA, ZERO)
+MAKE_PD_COMBINERS (in_reverse, ZERO, SRC_ALPHA)
+MAKE_PD_COMBINERS (out, INV_DA, ZERO)
+MAKE_PD_COMBINERS (out_reverse, ZERO, INV_SA)
+MAKE_PD_COMBINERS (atop, DEST_ALPHA, INV_SA)
+MAKE_PD_COMBINERS (atop_reverse, INV_DA, SRC_ALPHA)
+MAKE_PD_COMBINERS (xor, INV_DA, INV_SA)
+MAKE_PD_COMBINERS (add, ONE, ONE)
+
+MAKE_PD_COMBINERS (saturate, INV_DA_OVER_SA, ONE)
+
+MAKE_PD_COMBINERS (disjoint_clear, ZERO, ZERO)
+MAKE_PD_COMBINERS (disjoint_src, ONE, ZERO)
+MAKE_PD_COMBINERS (disjoint_dst, ZERO, ONE)
+MAKE_PD_COMBINERS (disjoint_over, ONE, INV_SA_OVER_DA)
+MAKE_PD_COMBINERS (disjoint_over_reverse, INV_DA_OVER_SA, ONE)
+MAKE_PD_COMBINERS (disjoint_in, ONE_MINUS_INV_DA_OVER_SA, ZERO)
+MAKE_PD_COMBINERS (disjoint_in_reverse, ZERO, ONE_MINUS_INV_SA_OVER_DA)
+MAKE_PD_COMBINERS (disjoint_out, INV_DA_OVER_SA, ZERO)
+MAKE_PD_COMBINERS (disjoint_out_reverse, ZERO, INV_SA_OVER_DA)
+MAKE_PD_COMBINERS (disjoint_atop, ONE_MINUS_INV_DA_OVER_SA, INV_SA_OVER_DA)
+MAKE_PD_COMBINERS (disjoint_atop_reverse, INV_DA_OVER_SA, ONE_MINUS_INV_SA_OVER_DA)
+MAKE_PD_COMBINERS (disjoint_xor, INV_DA_OVER_SA, INV_SA_OVER_DA)
+
+MAKE_PD_COMBINERS (conjoint_clear, ZERO, ZERO)
+MAKE_PD_COMBINERS (conjoint_src, ONE, ZERO)
+MAKE_PD_COMBINERS (conjoint_dst, ZERO, ONE)
+MAKE_PD_COMBINERS (conjoint_over, ONE, ONE_MINUS_SA_OVER_DA)
+MAKE_PD_COMBINERS (conjoint_over_reverse, ONE_MINUS_DA_OVER_SA, ONE)
+MAKE_PD_COMBINERS (conjoint_in, DA_OVER_SA, ZERO)
+MAKE_PD_COMBINERS (conjoint_in_reverse, ZERO, SA_OVER_DA)
+MAKE_PD_COMBINERS (conjoint_out, ONE_MINUS_DA_OVER_SA, ZERO)
+MAKE_PD_COMBINERS (conjoint_out_reverse, ZERO, ONE_MINUS_SA_OVER_DA)
+MAKE_PD_COMBINERS (conjoint_atop, DA_OVER_SA, ONE_MINUS_SA_OVER_DA)
+MAKE_PD_COMBINERS (conjoint_atop_reverse, ONE_MINUS_DA_OVER_SA, SA_OVER_DA)
+MAKE_PD_COMBINERS (conjoint_xor, ONE_MINUS_DA_OVER_SA, ONE_MINUS_SA_OVER_DA)
+
+/*
+ * PDF blend modes:
+ *
+ * The following blend modes have been taken from the PDF ISO 32000
+ * specification, which at this point in time is available from
+ * http://www.adobe.com/devnet/acrobat/pdfs/PDF32000_2008.pdf
+ * The relevant chapters are 11.3.5 and 11.3.6.
+ * The formula for computing the final pixel color given in 11.3.6 is:
+ * αr × Cr = (1 – αs) × αb × Cb + (1 – αb) × αs × Cs + αb × αs × B(Cb, Cs)
+ * with B() being the blend function.
+ * Note that OVER is a special case of this operation, using B(Cb, Cs) = Cs
+ *
+ * These blend modes should match the SVG filter draft specification, as
+ * it has been designed to mirror ISO 32000. Note that at the current point
+ * no released draft exists that shows this, as the formulas have not been
+ * updated yet after the release of ISO 32000.
+ *
+ * The default implementation here uses the PDF_SEPARABLE_BLEND_MODE and
+ * PDF_NON_SEPARABLE_BLEND_MODE macros, which take the blend function as an
+ * argument. Note that this implementation operates on premultiplied colors,
+ * while the PDF specification does not. Therefore the code uses the formula
+ * ar.Cra = (1 – as) . Dca + (1 – ad) . Sca + B(Dca, ad, Sca, as)
+ */
+
+#define MAKE_SEPARABLE_PDF_COMBINERS(name) \
+ static force_inline float \
+ combine_ ## name ## _a (float sa, float s, float da, float d) \
+ { \
+ return da + sa - da * sa; \
+ } \
+ \
+ static force_inline float \
+ combine_ ## name ## _c (float sa, float s, float da, float d) \
+ { \
+ float f = (1 - sa) * d + (1 - da) * s; \
+ \
+ return f + blend_ ## name (sa, s, da, d); \
+ } \
+ \
+ MAKE_COMBINERS (name, combine_ ## name ## _a, combine_ ## name ## _c)
+
+static force_inline float
+blend_multiply (float sa, float s, float da, float d)
+{
+ return d * s;
+}
+
+static force_inline float
+blend_screen (float sa, float s, float da, float d)
+{
+ return d * sa + s * da - s * d;
+}
+
+static force_inline float
+blend_overlay (float sa, float s, float da, float d)
+{
+ if (2 * d < da)
+ return 2 * s * d;
+ else
+ return sa * da - 2 * (da - d) * (sa - s);
+}
+
+static force_inline float
+blend_darken (float sa, float s, float da, float d)
+{
+ s = s * da;
+ d = d * sa;
+
+ if (s > d)
+ return d;
+ else
+ return s;
+}
+
+static force_inline float
+blend_lighten (float sa, float s, float da, float d)
+{
+ s = s * da;
+ d = d * sa;
+
+ if (s > d)
+ return s;
+ else
+ return d;
+}
+
+static force_inline float
+blend_color_dodge (float sa, float s, float da, float d)
+{
+ if (FLOAT_IS_ZERO (d))
+ return 0.0f;
+ else if (d * sa >= sa * da - s * da)
+ return sa * da;
+ else if (FLOAT_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 (FLOAT_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 (FLOAT_IS_ZERO (da))
+ return d * sa;
+ else
+ return d * sa - d * (da - d) * (sa - 2 * s) / da;
+ }
+ else
+ {
+ if (FLOAT_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 (FLOAT_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 (FLOAT_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 (FLOAT_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;
+}
Code Review / kvmfornfv.git / blobdiff