1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/cairo/libpixman/src/pixman-general.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,243 @@
1.4 +/*
1.5 + * Copyright © 2009 Red Hat, Inc.
1.6 + * Copyright © 2000 SuSE, Inc.
1.7 + * Copyright © 2007 Red Hat, Inc.
1.8 + * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
1.9 + * 2005 Lars Knoll & Zack Rusin, Trolltech
1.10 + * 2008 Aaron Plattner, NVIDIA Corporation
1.11 + *
1.12 + * Permission to use, copy, modify, distribute, and sell this software and its
1.13 + * documentation for any purpose is hereby granted without fee, provided that
1.14 + * the above copyright notice appear in all copies and that both that
1.15 + * copyright notice and this permission notice appear in supporting
1.16 + * documentation, and that the name of Red Hat not be used in advertising or
1.17 + * publicity pertaining to distribution of the software without specific,
1.18 + * written prior permission. Red Hat makes no representations about the
1.19 + * suitability of this software for any purpose. It is provided "as is"
1.20 + * without express or implied warranty.
1.21 + *
1.22 + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
1.23 + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.24 + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
1.25 + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1.26 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
1.27 + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
1.28 + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
1.29 + * SOFTWARE.
1.30 + */
1.31 +#ifdef HAVE_CONFIG_H
1.32 +#include <config.h>
1.33 +#endif
1.34 +#include <stdlib.h>
1.35 +#include <string.h>
1.36 +#include <math.h>
1.37 +#include <limits.h>
1.38 +#include <stdio.h>
1.39 +#include <stdlib.h>
1.40 +#include <string.h>
1.41 +#include "pixman-private.h"
1.42 +
1.43 +static pixman_bool_t
1.44 +general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
1.45 +{
1.46 + pixman_image_t *image = iter->image;
1.47 +
1.48 + if (image->type == LINEAR)
1.49 + _pixman_linear_gradient_iter_init (image, iter);
1.50 + else if (image->type == RADIAL)
1.51 + _pixman_radial_gradient_iter_init (image, iter);
1.52 + else if (image->type == CONICAL)
1.53 + _pixman_conical_gradient_iter_init (image, iter);
1.54 + else if (image->type == BITS)
1.55 + _pixman_bits_image_src_iter_init (image, iter);
1.56 + else if (image->type == SOLID)
1.57 + _pixman_log_error (FUNC, "Solid image not handled by noop");
1.58 + else
1.59 + _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
1.60 +
1.61 + return TRUE;
1.62 +}
1.63 +
1.64 +static pixman_bool_t
1.65 +general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
1.66 +{
1.67 + if (iter->image->type == BITS)
1.68 + {
1.69 + _pixman_bits_image_dest_iter_init (iter->image, iter);
1.70 +
1.71 + return TRUE;
1.72 + }
1.73 + else
1.74 + {
1.75 + _pixman_log_error (FUNC, "Trying to write to a non-writable image");
1.76 +
1.77 + return FALSE;
1.78 + }
1.79 +}
1.80 +
1.81 +typedef struct op_info_t op_info_t;
1.82 +struct op_info_t
1.83 +{
1.84 + uint8_t src, dst;
1.85 +};
1.86 +
1.87 +#define ITER_IGNORE_BOTH \
1.88 + (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
1.89 +
1.90 +static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
1.91 +{
1.92 + /* Src Dst */
1.93 + { ITER_IGNORE_BOTH, ITER_IGNORE_BOTH }, /* CLEAR */
1.94 + { ITER_LOCALIZED_ALPHA, ITER_IGNORE_BOTH }, /* SRC */
1.95 + { ITER_IGNORE_BOTH, ITER_LOCALIZED_ALPHA }, /* DST */
1.96 + { 0, ITER_LOCALIZED_ALPHA }, /* OVER */
1.97 + { ITER_LOCALIZED_ALPHA, 0 }, /* OVER_REVERSE */
1.98 + { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* IN */
1.99 + { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* IN_REVERSE */
1.100 + { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* OUT */
1.101 + { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* OUT_REVERSE */
1.102 + { 0, 0 }, /* ATOP */
1.103 + { 0, 0 }, /* ATOP_REVERSE */
1.104 + { 0, 0 }, /* XOR */
1.105 + { ITER_LOCALIZED_ALPHA, ITER_LOCALIZED_ALPHA }, /* ADD */
1.106 + { 0, 0 }, /* SATURATE */
1.107 +};
1.108 +
1.109 +#define SCANLINE_BUFFER_LENGTH 8192
1.110 +
1.111 +static void
1.112 +general_composite_rect (pixman_implementation_t *imp,
1.113 + pixman_composite_info_t *info)
1.114 +{
1.115 + PIXMAN_COMPOSITE_ARGS (info);
1.116 + uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
1.117 + uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
1.118 + uint8_t *src_buffer, *mask_buffer, *dest_buffer;
1.119 + pixman_iter_t src_iter, mask_iter, dest_iter;
1.120 + pixman_combine_32_func_t compose;
1.121 + pixman_bool_t component_alpha;
1.122 + iter_flags_t narrow, src_iter_flags;
1.123 + iter_flags_t rgb16;
1.124 + int Bpp;
1.125 + int i;
1.126 +
1.127 + if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
1.128 + (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
1.129 + (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
1.130 + {
1.131 + narrow = ITER_NARROW;
1.132 + Bpp = 4;
1.133 + }
1.134 + else
1.135 + {
1.136 + narrow = 0;
1.137 + Bpp = 16;
1.138 + }
1.139 +
1.140 + // XXX: This special casing is bad. Ideally, we'd keep the general code general perhaps
1.141 + // by having it deal more specifically with different intermediate formats
1.142 + if (
1.143 + (dest_image->common.flags & FAST_PATH_16_FORMAT && (src_image->type == LINEAR || src_image->type == RADIAL)) &&
1.144 + ( op == PIXMAN_OP_SRC ||
1.145 + (op == PIXMAN_OP_OVER && (src_image->common.flags & FAST_PATH_IS_OPAQUE))
1.146 + )
1.147 + ) {
1.148 + rgb16 = ITER_16;
1.149 + } else {
1.150 + rgb16 = 0;
1.151 + }
1.152 +
1.153 +
1.154 + if (width * Bpp > SCANLINE_BUFFER_LENGTH)
1.155 + {
1.156 + scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
1.157 +
1.158 + if (!scanline_buffer)
1.159 + return;
1.160 + }
1.161 +
1.162 + src_buffer = scanline_buffer;
1.163 + mask_buffer = src_buffer + width * Bpp;
1.164 + dest_buffer = mask_buffer + width * Bpp;
1.165 +
1.166 + if (!narrow)
1.167 + {
1.168 + /* To make sure there aren't any NANs in the buffers */
1.169 + memset (src_buffer, 0, width * Bpp);
1.170 + memset (mask_buffer, 0, width * Bpp);
1.171 + memset (dest_buffer, 0, width * Bpp);
1.172 + }
1.173 +
1.174 + /* src iter */
1.175 + src_iter_flags = narrow | op_flags[op].src | rgb16;
1.176 +
1.177 + _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
1.178 + src_x, src_y, width, height,
1.179 + src_buffer, src_iter_flags, info->src_flags);
1.180 +
1.181 + /* mask iter */
1.182 + if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
1.183 + (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
1.184 + {
1.185 + /* If it doesn't matter what the source is, then it doesn't matter
1.186 + * what the mask is
1.187 + */
1.188 + mask_image = NULL;
1.189 + }
1.190 +
1.191 + component_alpha =
1.192 + mask_image &&
1.193 + mask_image->common.type == BITS &&
1.194 + mask_image->common.component_alpha &&
1.195 + PIXMAN_FORMAT_RGB (mask_image->bits.format);
1.196 +
1.197 + _pixman_implementation_src_iter_init (
1.198 + imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
1.199 + mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
1.200 +
1.201 + /* dest iter */
1.202 + _pixman_implementation_dest_iter_init (
1.203 + imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
1.204 + dest_buffer, narrow | op_flags[op].dst | rgb16, info->dest_flags);
1.205 +
1.206 + compose = _pixman_implementation_lookup_combiner (
1.207 + imp->toplevel, op, component_alpha, narrow, !!rgb16);
1.208 +
1.209 + for (i = 0; i < height; ++i)
1.210 + {
1.211 + uint32_t *s, *m, *d;
1.212 +
1.213 + m = mask_iter.get_scanline (&mask_iter, NULL);
1.214 + s = src_iter.get_scanline (&src_iter, m);
1.215 + d = dest_iter.get_scanline (&dest_iter, NULL);
1.216 +
1.217 + compose (imp->toplevel, op, d, s, m, width);
1.218 +
1.219 + dest_iter.write_back (&dest_iter);
1.220 + }
1.221 +
1.222 + if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
1.223 + free (scanline_buffer);
1.224 +}
1.225 +
1.226 +static const pixman_fast_path_t general_fast_path[] =
1.227 +{
1.228 + { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
1.229 + { PIXMAN_OP_NONE }
1.230 +};
1.231 +
1.232 +pixman_implementation_t *
1.233 +_pixman_implementation_create_general (void)
1.234 +{
1.235 + pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
1.236 +
1.237 + _pixman_setup_combiner_functions_16 (imp);
1.238 + _pixman_setup_combiner_functions_32 (imp);
1.239 + _pixman_setup_combiner_functions_float (imp);
1.240 +
1.241 + imp->src_iter_init = general_src_iter_init;
1.242 + imp->dest_iter_init = general_dest_iter_init;
1.243 +
1.244 + return imp;
1.245 +}
1.246 +
