| 0,0 → 1,1016 |
|---|
| /* -*- 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; |
| } |