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Diffstat (limited to 'libs/pixman-0.40.0/pixman/pixman-combine-float.c')
| -rw-r--r-- | libs/pixman-0.40.0/pixman/pixman-combine-float.c | 1158 |
1 files changed, 1158 insertions, 0 deletions
diff --git a/libs/pixman-0.40.0/pixman/pixman-combine-float.c b/libs/pixman-0.40.0/pixman/pixman-combine-float.c new file mode 100644 index 0000000..f5145bc --- /dev/null +++ b/libs/pixman-0.40.0/pixman/pixman-combine-float.c @@ -0,0 +1,1158 @@ +/* -*- 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/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 + */ + +#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) + +/* + * Multiply + * + * ad * as * B(d / ad, s / as) + * = ad * as * d/ad * s/as + * = d * s + * + */ +static force_inline float +blend_multiply (float sa, float s, float da, float d) +{ + return d * s; +} + +/* + * 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 force_inline float +blend_screen (float sa, float s, float da, float d) +{ + return d * sa + s * da - s * d; +} + +/* + * 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 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); +} + +/* + * Darken + * + * ad * as * B(d/ad, s/as) + * = ad * as * MIN(d/ad, s/as) + * = MIN (as * d, ad * 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; +} + +/* + * Lighten + * + * ad * as * B(d/ad, s/as) + * = ad * as * MAX(d/ad, s/as) + * = MAX (as * d, ad * 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; +} + +/* + * Color dodge + * + * ad * as * B(d/ad, s/as) + * = if d/ad = 0 + * ad * as * 0 + * else if (d/ad >= (1 - s/as) + * ad * as * 1 + * else + * ad * as * ((d/ad) / (1 - s/as)) + * = if d = 0 + * 0 + * elif as * d >= ad * (as - s) + * ad * as + * else + * as * (as * d / (as - s)) + * + */ +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); +} + +/* + * Color burn + * + * We modify the first clause "if d = 1" to "if d >= 1" since with + * premultiplied colors d > 1 can actually happen. + * + * ad * as * B(d/ad, s/as) + * = if d/ad >= 1 + * ad * as * 1 + * elif (1 - d/ad) >= s/as + * ad * as * 0 + * else + * ad * as * (1 - ((1 - d/ad) / (s/as))) + * = if d >= ad + * ad * as + * elif as * ad - as * d >= ad * s + * 0 + * else + * ad * as - as * as * (ad - d) / 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); +} + +/* + * 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 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); +} + +/* + * Soft light + * + * ad * as * B(d/ad, s/as) + * = if (s/as <= 0.5) + * ad * as * (d/ad - (1 - 2 * s/as) * d/ad * (1 - d/ad)) + * else if (d/ad <= 0.25) + * ad * as * (d/ad + (2 * s/as - 1) * ((((16 * d/ad - 12) * d/ad + 4) * d/ad) - d/ad)) + * else + * ad * as * (d/ad + (2 * s/as - 1) * sqrt (d/ad)) + * = if (2 * s <= as) + * d * as - d * (ad - d) * (as - 2 * s) / ad; + * else if (4 * d <= ad) + * (2 * s - as) * d * ((16 * d / ad - 12) * d / ad + 3); + * else + * d * as + (sqrt (d * ad) - d) * (2 * s - as); + */ +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 d * sa; + } + 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); + } + } +} + +/* + * 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 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; +} + +/* + * 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 + */ +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 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, r * a); + * + * for positive r. + * + * Similarly, we can extend set_lum with an extra argument that is just passed + * on to clip_color: + * + * r * set_lum (C, l, a) + * + * = r × clip_color (C + l - LUM (C), a) + * + * = clip_color (r * C + r × l - r * LUM (C), r * a) + * + * = set_lum (r * C, r * l, r * a) + * + * Finally, set_sat: + * + * r * set_sat (C, s) = set_sat (x * C, r * s) + * + * The above holds for all non-zero x, because the x'es in the fraction for + * C_mid cancel out. Specifically, it holds for x = r: + * + * r * set_sat (C, s) = set_sat (r * C, r * s) + * + */ +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: + * + * as * ad * B(s/as, d/as) + * = as * ad * set_lum (set_sat (s/as, SAT (d/ad)), LUM (d/ad), 1) + * = set_lum (set_sat (ad * s, as * SAT (d)), as * LUM (d), as * ad) + * + */ +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 + * + * as * ad * B(s/as, d/ad) + * = as * ad * set_lum (set_sat (d/ad, SAT (s/as)), LUM (d/ad), 1) + * = set_lum (as * ad * set_sat (d/ad, SAT (s/as)), + * as * LUM (d), as * ad) + * = set_lum (set_sat (as * d, ad * SAT (s), as * LUM (d), as * ad)) + */ +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 + * + * as * ad * B(s/as, d/as) + * = as * ad * set_lum (s/as, LUM (d/ad), 1) + * = set_lum (s * ad, as * LUM (d), as * ad) + */ +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 + * + * as * ad * B(s/as, d/ad) + * = as * ad * set_lum (d/ad, LUM (s/as), 1) + * = set_lum (as * d, ad * LUM (s), as * ad) + */ +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; +} |