| /* |
| * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc. |
| * 2005 Lars Knoll & Zack Rusin, Trolltech |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and its |
| * documentation for any purpose is hereby granted without fee, provided that |
| * the above copyright notice appear in all copies and that both that |
| * copyright notice and this permission notice appear in supporting |
| * documentation, and that the name of Keith Packard not be used in |
| * advertising or publicity pertaining to distribution of the software without |
| * specific, written prior permission. Keith Packard makes no |
| * representations about the suitability of this software for any purpose. It |
| * is provided "as is" without express or implied warranty. |
| * |
| * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
| * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
| * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
| * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| * SOFTWARE. |
| */ |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <math.h> |
| #include <string.h> |
| |
| #include "pixman-private.h" |
| #include "pixman-combine32.h" |
| |
| /* component alpha helper functions */ |
| |
| static void |
| combine_mask_ca (uint32_t *src, uint32_t *mask) |
| { |
| uint32_t a = *mask; |
| |
| uint32_t x; |
| uint16_t xa; |
| |
| if (!a) |
| { |
| *(src) = 0; |
| return; |
| } |
| |
| x = *(src); |
| if (a == ~0) |
| { |
| x = x >> A_SHIFT; |
| x |= x << G_SHIFT; |
| x |= x << R_SHIFT; |
| *(mask) = x; |
| return; |
| } |
| |
| xa = x >> A_SHIFT; |
| UN8x4_MUL_UN8x4 (x, a); |
| *(src) = x; |
| |
| UN8x4_MUL_UN8 (a, xa); |
| *(mask) = a; |
| } |
| |
| static void |
| combine_mask_value_ca (uint32_t *src, const uint32_t *mask) |
| { |
| uint32_t a = *mask; |
| uint32_t x; |
| |
| if (!a) |
| { |
| *(src) = 0; |
| return; |
| } |
| |
| if (a == ~0) |
| return; |
| |
| x = *(src); |
| UN8x4_MUL_UN8x4 (x, a); |
| *(src) = x; |
| } |
| |
| static void |
| combine_mask_alpha_ca (const uint32_t *src, uint32_t *mask) |
| { |
| uint32_t a = *(mask); |
| uint32_t x; |
| |
| if (!a) |
| return; |
| |
| x = *(src) >> A_SHIFT; |
| if (x == MASK) |
| return; |
| |
| if (a == ~0) |
| { |
| x |= x << G_SHIFT; |
| x |= x << R_SHIFT; |
| *(mask) = x; |
| return; |
| } |
| |
| UN8x4_MUL_UN8 (a, x); |
| *(mask) = a; |
| } |
| |
| /* |
| * There are two ways of handling alpha -- either as a single unified value or |
| * a separate value for each component, hence each macro must have two |
| * versions. The unified alpha version has a 'u' at the end of the name, |
| * the component version has a 'ca'. Similarly, functions which deal with |
| * this difference will have two versions using the same convention. |
| */ |
| |
| static force_inline uint32_t |
| combine_mask (const uint32_t *src, const uint32_t *mask, int i) |
| { |
| uint32_t s, m; |
| |
| if (mask) |
| { |
| m = *(mask + i) >> A_SHIFT; |
| |
| if (!m) |
| return 0; |
| } |
| |
| s = *(src + i); |
| |
| if (mask) |
| UN8x4_MUL_UN8 (s, m); |
| |
| return s; |
| } |
| |
| static void |
| combine_clear (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| memset (dest, 0, width * sizeof (uint32_t)); |
| } |
| |
| static void |
| combine_dst (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| return; |
| } |
| |
| static void |
| combine_src_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| if (!mask) |
| { |
| memcpy (dest, src, width * sizeof (uint32_t)); |
| } |
| else |
| { |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| |
| *(dest + i) = s; |
| } |
| } |
| } |
| |
| static void |
| combine_over_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| if (!mask) |
| { |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t a = ALPHA_8 (s); |
| if (a == 0xFF) |
| { |
| *(dest + i) = s; |
| } |
| else if (s) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t ia = a ^ 0xFF; |
| UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s); |
| *(dest + i) = d; |
| } |
| } |
| } |
| else |
| { |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t m = ALPHA_8 (*(mask + i)); |
| if (m == 0xFF) |
| { |
| uint32_t s = *(src + i); |
| uint32_t a = ALPHA_8 (s); |
| if (a == 0xFF) |
| { |
| *(dest + i) = s; |
| } |
| else if (s) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t ia = a ^ 0xFF; |
| UN8x4_MUL_UN8_ADD_UN8x4 (d, ia, s); |
| *(dest + i) = d; |
| } |
| } |
| else if (m) |
| { |
| uint32_t s = *(src + i); |
| if (s) |
| { |
| uint32_t d = *(dest + i); |
| UN8x4_MUL_UN8 (s, m); |
| UN8x4_MUL_UN8_ADD_UN8x4 (d, ALPHA_8 (~s), s); |
| *(dest + i) = d; |
| } |
| } |
| } |
| } |
| } |
| |
| static void |
| combine_over_reverse_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t ia = ALPHA_8 (~*(dest + i)); |
| UN8x4_MUL_UN8_ADD_UN8x4 (s, ia, d); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_in_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t a = ALPHA_8 (*(dest + i)); |
| UN8x4_MUL_UN8 (s, a); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_in_reverse_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t a = ALPHA_8 (s); |
| UN8x4_MUL_UN8 (d, a); |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_out_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t a = ALPHA_8 (~*(dest + i)); |
| UN8x4_MUL_UN8 (s, a); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_out_reverse_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t a = ALPHA_8 (~s); |
| UN8x4_MUL_UN8 (d, a); |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_atop_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t dest_a = ALPHA_8 (d); |
| uint32_t src_ia = ALPHA_8 (~s); |
| |
| UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_a, d, src_ia); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_atop_reverse_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t src_a = ALPHA_8 (s); |
| uint32_t dest_ia = ALPHA_8 (~d); |
| |
| UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_ia, d, src_a); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_xor_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t src_ia = ALPHA_8 (~s); |
| uint32_t dest_ia = ALPHA_8 (~d); |
| |
| UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (s, dest_ia, d, src_ia); |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_add_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| UN8x4_ADD_UN8x4 (d, s); |
| *(dest + i) = d; |
| } |
| } |
| |
| /* |
| * PDF blend modes: |
| * |
| * The following blend modes have been taken from the PDF ISO 32000 |
| * specification, which at this point in time is available from |
| * |
| * http://www.adobe.com/devnet/pdf/pdf_reference.html |
| * |
| * The specific documents of interest are the PDF spec itself: |
| * |
| * http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf |
| * |
| * chapters 11.3.5 and 11.3.6 and a later supplement for Adobe Acrobat |
| * 9.1 and Reader 9.1: |
| * |
| * http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/adobe_supplement_iso32000_1.pdf |
| * |
| * that clarifies the specifications for blend modes ColorDodge and |
| * ColorBurn. |
| * |
| * The formula for computing the final pixel color given in 11.3.6 is: |
| * |
| * αr × Cr = (1 – αs) × αb × Cb + (1 – αb) × αs × Cs + αb × αs × B(Cb, Cs) |
| * |
| * with B() is the blend function. When B(Cb, Cs) = Cs, this formula |
| * reduces to the regular OVER operator. |
| * |
| * Cs and Cb are not premultiplied, so in our implementation we instead |
| * use: |
| * |
| * cr = (1 – αs) × cb + (1 – αb) × cs + αb × αs × B (cb/αb, cs/αs) |
| * |
| * where cr, cs, and cb are premultiplied colors, and where the |
| * |
| * αb × αs × B(cb/αb, cs/αs) |
| * |
| * part is first arithmetically simplified under the assumption that αb |
| * and αs are not 0, and then updated to produce a meaningful result when |
| * they are. |
| * |
| * For all the blend mode operators, the alpha channel is given by |
| * |
| * αr = αs + αb + αb × αs |
| */ |
| |
| /* |
| * Multiply |
| * |
| * ad * as * B(d / ad, s / as) |
| * = ad * as * d/ad * s/as |
| * = d * s |
| * |
| */ |
| static void |
| combine_multiply_u (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = combine_mask (src, mask, i); |
| uint32_t d = *(dest + i); |
| uint32_t ss = s; |
| uint32_t src_ia = ALPHA_8 (~s); |
| uint32_t dest_ia = ALPHA_8 (~d); |
| |
| UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8 (ss, dest_ia, d, src_ia); |
| UN8x4_MUL_UN8x4 (d, s); |
| UN8x4_ADD_UN8x4 (d, ss); |
| |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_multiply_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t m = *(mask + i); |
| uint32_t s = *(src + i); |
| uint32_t d = *(dest + i); |
| uint32_t r = d; |
| uint32_t dest_ia = ALPHA_8 (~d); |
| |
| combine_mask_ca (&s, &m); |
| |
| UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (r, ~m, s, dest_ia); |
| UN8x4_MUL_UN8x4 (d, s); |
| UN8x4_ADD_UN8x4 (r, d); |
| |
| *(dest + i) = r; |
| } |
| } |
| |
| #define CLAMP(v, low, high) \ |
| do \ |
| { \ |
| if (v < (low)) \ |
| v = (low); \ |
| if (v > (high)) \ |
| v = (high); \ |
| } while (0) |
| |
| #define PDF_SEPARABLE_BLEND_MODE(name) \ |
| static void \ |
| combine_ ## name ## _u (pixman_implementation_t *imp, \ |
| pixman_op_t op, \ |
| uint32_t * dest, \ |
| const uint32_t * src, \ |
| const uint32_t * mask, \ |
| int width) \ |
| { \ |
| int i; \ |
| for (i = 0; i < width; ++i) \ |
| { \ |
| uint32_t s = combine_mask (src, mask, i); \ |
| uint32_t d = *(dest + i); \ |
| uint8_t sa = ALPHA_8 (s); \ |
| uint8_t isa = ~sa; \ |
| uint8_t da = ALPHA_8 (d); \ |
| uint8_t ida = ~da; \ |
| int32_t ra, rr, rg, rb; \ |
| \ |
| ra = da * 0xff + sa * 0xff - sa * da; \ |
| rr = isa * RED_8 (d) + ida * RED_8 (s); \ |
| rg = isa * GREEN_8 (d) + ida * GREEN_8 (s); \ |
| rb = isa * BLUE_8 (d) + ida * BLUE_8 (s); \ |
| \ |
| rr += blend_ ## name (RED_8 (d), da, RED_8 (s), sa); \ |
| rg += blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), sa); \ |
| rb += blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), sa); \ |
| \ |
| CLAMP (ra, 0, 255 * 255); \ |
| CLAMP (rr, 0, 255 * 255); \ |
| CLAMP (rg, 0, 255 * 255); \ |
| CLAMP (rb, 0, 255 * 255); \ |
| \ |
| ra = DIV_ONE_UN8 (ra); \ |
| rr = DIV_ONE_UN8 (rr); \ |
| rg = DIV_ONE_UN8 (rg); \ |
| rb = DIV_ONE_UN8 (rb); \ |
| \ |
| *(dest + i) = ra << 24 | rr << 16 | rg << 8 | rb; \ |
| } \ |
| } \ |
| \ |
| static void \ |
| combine_ ## name ## _ca (pixman_implementation_t *imp, \ |
| pixman_op_t op, \ |
| uint32_t * dest, \ |
| const uint32_t * src, \ |
| const uint32_t * mask, \ |
| int width) \ |
| { \ |
| int i; \ |
| for (i = 0; i < width; ++i) \ |
| { \ |
| uint32_t m = *(mask + i); \ |
| uint32_t s = *(src + i); \ |
| uint32_t d = *(dest + i); \ |
| uint8_t da = ALPHA_8 (d); \ |
| uint8_t ida = ~da; \ |
| int32_t ra, rr, rg, rb; \ |
| uint8_t ira, iga, iba; \ |
| \ |
| combine_mask_ca (&s, &m); \ |
| \ |
| ira = ~RED_8 (m); \ |
| iga = ~GREEN_8 (m); \ |
| iba = ~BLUE_8 (m); \ |
| \ |
| ra = da * 0xff + ALPHA_8 (s) * 0xff - ALPHA_8 (s) * da; \ |
| rr = ira * RED_8 (d) + ida * RED_8 (s); \ |
| rg = iga * GREEN_8 (d) + ida * GREEN_8 (s); \ |
| rb = iba * BLUE_8 (d) + ida * BLUE_8 (s); \ |
| \ |
| rr += blend_ ## name (RED_8 (d), da, RED_8 (s), RED_8 (m)); \ |
| rg += blend_ ## name (GREEN_8 (d), da, GREEN_8 (s), GREEN_8 (m)); \ |
| rb += blend_ ## name (BLUE_8 (d), da, BLUE_8 (s), BLUE_8 (m)); \ |
| \ |
| CLAMP (ra, 0, 255 * 255); \ |
| CLAMP (rr, 0, 255 * 255); \ |
| CLAMP (rg, 0, 255 * 255); \ |
| CLAMP (rb, 0, 255 * 255); \ |
| \ |
| ra = DIV_ONE_UN8 (ra); \ |
| rr = DIV_ONE_UN8 (rr); \ |
| rg = DIV_ONE_UN8 (rg); \ |
| rb = DIV_ONE_UN8 (rb); \ |
| \ |
| *(dest + i) = ra << 24 | rr << 16 | rg << 8 | rb; \ |
| } \ |
| } |
| |
| /* |
| * Screen |
| * |
| * ad * as * B(d/ad, s/as) |
| * = ad * as * (d/ad + s/as - s/as * d/ad) |
| * = ad * s + as * d - s * d |
| */ |
| static inline int32_t |
| blend_screen (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| return s * ad + d * as - s * d; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (screen) |
| |
| /* |
| * Overlay |
| * |
| * ad * as * B(d/ad, s/as) |
| * = ad * as * Hardlight (s, d) |
| * = if (d / ad < 0.5) |
| * as * ad * Multiply (s/as, 2 * d/ad) |
| * else |
| * as * ad * Screen (s/as, 2 * d / ad - 1) |
| * = if (d < 0.5 * ad) |
| * as * ad * s/as * 2 * d /ad |
| * else |
| * as * ad * (s/as + 2 * d / ad - 1 - s / as * (2 * d / ad - 1)) |
| * = if (2 * d < ad) |
| * 2 * s * d |
| * else |
| * ad * s + 2 * as * d - as * ad - ad * s * (2 * d / ad - 1) |
| * = if (2 * d < ad) |
| * 2 * s * d |
| * else |
| * as * ad - 2 * (ad - d) * (as - s) |
| */ |
| static inline int32_t |
| blend_overlay (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| uint32_t r; |
| |
| if (2 * d < ad) |
| r = 2 * s * d; |
| else |
| r = as * ad - 2 * (ad - d) * (as - s); |
| |
| return r; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (overlay) |
| |
| /* |
| * Darken |
| * |
| * ad * as * B(d/ad, s/as) |
| * = ad * as * MIN(d/ad, s/as) |
| * = MIN (as * d, ad * s) |
| */ |
| static inline int32_t |
| blend_darken (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| s = ad * s; |
| d = as * d; |
| |
| return s > d ? d : s; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (darken) |
| |
| /* |
| * Lighten |
| * |
| * ad * as * B(d/ad, s/as) |
| * = ad * as * MAX(d/ad, s/as) |
| * = MAX (as * d, ad * s) |
| */ |
| static inline int32_t |
| blend_lighten (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| s = ad * s; |
| d = as * d; |
| |
| return s > d ? s : d; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (lighten) |
| |
| /* |
| * Hard light |
| * |
| * ad * as * B(d/ad, s/as) |
| * = if (s/as <= 0.5) |
| * ad * as * Multiply (d/ad, 2 * s/as) |
| * else |
| * ad * as * Screen (d/ad, 2 * s/as - 1) |
| * = if 2 * s <= as |
| * ad * as * d/ad * 2 * s / as |
| * else |
| * ad * as * (d/ad + (2 * s/as - 1) + d/ad * (2 * s/as - 1)) |
| * = if 2 * s <= as |
| * 2 * s * d |
| * else |
| * as * ad - 2 * (ad - d) * (as - s) |
| */ |
| static inline int32_t |
| blend_hard_light (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| if (2 * s < as) |
| return 2 * s * d; |
| else |
| return as * ad - 2 * (ad - d) * (as - s); |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (hard_light) |
| |
| /* |
| * Difference |
| * |
| * ad * as * B(s/as, d/ad) |
| * = ad * as * abs (s/as - d/ad) |
| * = if (s/as <= d/ad) |
| * ad * as * (d/ad - s/as) |
| * else |
| * ad * as * (s/as - d/ad) |
| * = if (ad * s <= as * d) |
| * as * d - ad * s |
| * else |
| * ad * s - as * d |
| */ |
| static inline int32_t |
| blend_difference (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| int32_t das = d * as; |
| int32_t sad = s * ad; |
| |
| if (sad < das) |
| return das - sad; |
| else |
| return sad - das; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (difference) |
| |
| /* |
| * Exclusion |
| * |
| * ad * as * B(s/as, d/ad) |
| * = ad * as * (d/ad + s/as - 2 * d/ad * s/as) |
| * = as * d + ad * s - 2 * s * d |
| */ |
| |
| /* This can be made faster by writing it directly and not using |
| * PDF_SEPARABLE_BLEND_MODE, but that's a performance optimization */ |
| |
| static inline int32_t |
| blend_exclusion (int32_t d, int32_t ad, int32_t s, int32_t as) |
| { |
| return s * ad + d * as - 2 * d * s; |
| } |
| |
| PDF_SEPARABLE_BLEND_MODE (exclusion) |
| |
| #undef PDF_SEPARABLE_BLEND_MODE |
| |
| /* Component alpha combiners */ |
| |
| static void |
| combine_clear_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| memset (dest, 0, width * sizeof(uint32_t)); |
| } |
| |
| static void |
| combine_src_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| |
| combine_mask_value_ca (&s, &m); |
| |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_over_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t a; |
| |
| combine_mask_ca (&s, &m); |
| |
| a = ~m; |
| if (a) |
| { |
| uint32_t d = *(dest + i); |
| UN8x4_MUL_UN8x4_ADD_UN8x4 (d, a, s); |
| s = d; |
| } |
| |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_over_reverse_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t a = ~d >> A_SHIFT; |
| |
| if (a) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| |
| UN8x4_MUL_UN8x4 (s, m); |
| UN8x4_MUL_UN8_ADD_UN8x4 (s, a, d); |
| |
| *(dest + i) = s; |
| } |
| } |
| } |
| |
| static void |
| combine_in_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint16_t a = d >> A_SHIFT; |
| uint32_t s = 0; |
| |
| if (a) |
| { |
| uint32_t m = *(mask + i); |
| |
| s = *(src + i); |
| combine_mask_value_ca (&s, &m); |
| |
| if (a != MASK) |
| UN8x4_MUL_UN8 (s, a); |
| } |
| |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_in_reverse_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t a; |
| |
| combine_mask_alpha_ca (&s, &m); |
| |
| a = m; |
| if (a != ~0) |
| { |
| uint32_t d = 0; |
| |
| if (a) |
| { |
| d = *(dest + i); |
| UN8x4_MUL_UN8x4 (d, a); |
| } |
| |
| *(dest + i) = d; |
| } |
| } |
| } |
| |
| static void |
| combine_out_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint16_t a = ~d >> A_SHIFT; |
| uint32_t s = 0; |
| |
| if (a) |
| { |
| uint32_t m = *(mask + i); |
| |
| s = *(src + i); |
| combine_mask_value_ca (&s, &m); |
| |
| if (a != MASK) |
| UN8x4_MUL_UN8 (s, a); |
| } |
| |
| *(dest + i) = s; |
| } |
| } |
| |
| static void |
| combine_out_reverse_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t a; |
| |
| combine_mask_alpha_ca (&s, &m); |
| |
| a = ~m; |
| if (a != ~0) |
| { |
| uint32_t d = 0; |
| |
| if (a) |
| { |
| d = *(dest + i); |
| UN8x4_MUL_UN8x4 (d, a); |
| } |
| |
| *(dest + i) = d; |
| } |
| } |
| } |
| |
| static void |
| combine_atop_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t ad; |
| uint16_t as = d >> A_SHIFT; |
| |
| combine_mask_ca (&s, &m); |
| |
| ad = ~m; |
| |
| UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as); |
| |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_atop_reverse_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t ad; |
| uint16_t as = ~d >> A_SHIFT; |
| |
| combine_mask_ca (&s, &m); |
| |
| ad = m; |
| |
| UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as); |
| |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_xor_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t d = *(dest + i); |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t ad; |
| uint16_t as = ~d >> A_SHIFT; |
| |
| combine_mask_ca (&s, &m); |
| |
| ad = ~m; |
| |
| UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ad, s, as); |
| |
| *(dest + i) = d; |
| } |
| } |
| |
| static void |
| combine_add_ca (pixman_implementation_t *imp, |
| pixman_op_t op, |
| uint32_t * dest, |
| const uint32_t * src, |
| const uint32_t * mask, |
| int width) |
| { |
| int i; |
| |
| for (i = 0; i < width; ++i) |
| { |
| uint32_t s = *(src + i); |
| uint32_t m = *(mask + i); |
| uint32_t d = *(dest + i); |
| |
| combine_mask_value_ca (&s, &m); |
| |
| UN8x4_ADD_UN8x4 (d, s); |
| |
| *(dest + i) = d; |
| } |
| } |
| |
| void |
| _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp) |
| { |
| /* Unified alpha */ |
| imp->combine_32[PIXMAN_OP_CLEAR] = combine_clear; |
| imp->combine_32[PIXMAN_OP_SRC] = combine_src_u; |
| imp->combine_32[PIXMAN_OP_DST] = combine_dst; |
| imp->combine_32[PIXMAN_OP_OVER] = combine_over_u; |
| imp->combine_32[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_u; |
| imp->combine_32[PIXMAN_OP_IN] = combine_in_u; |
| imp->combine_32[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_u; |
| imp->combine_32[PIXMAN_OP_OUT] = combine_out_u; |
| imp->combine_32[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_u; |
| imp->combine_32[PIXMAN_OP_ATOP] = combine_atop_u; |
| imp->combine_32[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_u; |
| imp->combine_32[PIXMAN_OP_XOR] = combine_xor_u; |
| imp->combine_32[PIXMAN_OP_ADD] = combine_add_u; |
| |
| imp->combine_32[PIXMAN_OP_MULTIPLY] = combine_multiply_u; |
| imp->combine_32[PIXMAN_OP_SCREEN] = combine_screen_u; |
| imp->combine_32[PIXMAN_OP_OVERLAY] = combine_overlay_u; |
| imp->combine_32[PIXMAN_OP_DARKEN] = combine_darken_u; |
| imp->combine_32[PIXMAN_OP_LIGHTEN] = combine_lighten_u; |
| imp->combine_32[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_u; |
| imp->combine_32[PIXMAN_OP_DIFFERENCE] = combine_difference_u; |
| imp->combine_32[PIXMAN_OP_EXCLUSION] = combine_exclusion_u; |
| |
| /* Component alpha combiners */ |
| imp->combine_32_ca[PIXMAN_OP_CLEAR] = combine_clear_ca; |
| imp->combine_32_ca[PIXMAN_OP_SRC] = combine_src_ca; |
| /* dest */ |
| imp->combine_32_ca[PIXMAN_OP_OVER] = combine_over_ca; |
| imp->combine_32_ca[PIXMAN_OP_OVER_REVERSE] = combine_over_reverse_ca; |
| imp->combine_32_ca[PIXMAN_OP_IN] = combine_in_ca; |
| imp->combine_32_ca[PIXMAN_OP_IN_REVERSE] = combine_in_reverse_ca; |
| imp->combine_32_ca[PIXMAN_OP_OUT] = combine_out_ca; |
| imp->combine_32_ca[PIXMAN_OP_OUT_REVERSE] = combine_out_reverse_ca; |
| imp->combine_32_ca[PIXMAN_OP_ATOP] = combine_atop_ca; |
| imp->combine_32_ca[PIXMAN_OP_ATOP_REVERSE] = combine_atop_reverse_ca; |
| imp->combine_32_ca[PIXMAN_OP_XOR] = combine_xor_ca; |
| imp->combine_32_ca[PIXMAN_OP_ADD] = combine_add_ca; |
| |
| imp->combine_32_ca[PIXMAN_OP_MULTIPLY] = combine_multiply_ca; |
| imp->combine_32_ca[PIXMAN_OP_SCREEN] = combine_screen_ca; |
| imp->combine_32_ca[PIXMAN_OP_OVERLAY] = combine_overlay_ca; |
| imp->combine_32_ca[PIXMAN_OP_DARKEN] = combine_darken_ca; |
| imp->combine_32_ca[PIXMAN_OP_LIGHTEN] = combine_lighten_ca; |
| imp->combine_32_ca[PIXMAN_OP_HARD_LIGHT] = combine_hard_light_ca; |
| imp->combine_32_ca[PIXMAN_OP_DIFFERENCE] = combine_difference_ca; |
| imp->combine_32_ca[PIXMAN_OP_EXCLUSION] = combine_exclusion_ca; |
| } |
