1 /*
2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2000 SuSE, Inc.
4 * Copyright © 2007 Red Hat, Inc.
5 * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
6 * 2005 Lars Knoll & Zack Rusin, Trolltech
7 * 2008 Aaron Plattner, NVIDIA Corporation
8 *
9 * Permission to use, copy, modify, distribute, and sell this software and its
10 * documentation for any purpose is hereby granted without fee, provided that
11 * the above copyright notice appear in all copies and that both that
12 * copyright notice and this permission notice appear in supporting
13 * documentation, and that the name of Red Hat not be used in advertising or
14 * publicity pertaining to distribution of the software without specific,
15 * written prior permission. Red Hat makes no representations about the
16 * suitability of this software for any purpose. It is provided "as is"
17 * without express or implied warranty.
18 *
19 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
20 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
23 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
24 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
25 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
26 * SOFTWARE.
27 */
28 #ifdef HAVE_CONFIG_H
29 #include <config.h>
30 #endif
31 #include <stdlib.h>
32 #include <string.h>
33 #include <math.h>
34 #include <limits.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include "pixman-private.h"
39
40 static pixman_bool_t
general_src_iter_init(pixman_implementation_t * imp,pixman_iter_t * iter)41 general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
42 {
43 pixman_image_t *image = iter->image;
44
45 if (image->type == LINEAR)
46 _pixman_linear_gradient_iter_init (image, iter);
47 else if (image->type == RADIAL)
48 _pixman_radial_gradient_iter_init (image, iter);
49 else if (image->type == CONICAL)
50 _pixman_conical_gradient_iter_init (image, iter);
51 else if (image->type == BITS)
52 _pixman_bits_image_src_iter_init (image, iter);
53 else if (image->type == SOLID)
54 _pixman_log_error (FUNC, "Solid image not handled by noop");
55 else
56 _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
57
58 return TRUE;
59 }
60
61 static pixman_bool_t
general_dest_iter_init(pixman_implementation_t * imp,pixman_iter_t * iter)62 general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
63 {
64 if (iter->image->type == BITS)
65 {
66 _pixman_bits_image_dest_iter_init (iter->image, iter);
67
68 return TRUE;
69 }
70 else
71 {
72 _pixman_log_error (FUNC, "Trying to write to a non-writable image");
73
74 return FALSE;
75 }
76 }
77
78 typedef struct op_info_t op_info_t;
79 struct op_info_t
80 {
81 uint8_t src, dst;
82 };
83
84 #define ITER_IGNORE_BOTH \
85 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
86
87 static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
88 {
89 /* Src Dst */
90 { ITER_IGNORE_BOTH, ITER_IGNORE_BOTH }, /* CLEAR */
91 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_BOTH }, /* SRC */
92 { ITER_IGNORE_BOTH, ITER_LOCALIZED_ALPHA }, /* DST */
93 { 0, ITER_LOCALIZED_ALPHA }, /* OVER */
94 { ITER_LOCALIZED_ALPHA, 0 }, /* OVER_REVERSE */
95 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* IN */
96 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* IN_REVERSE */
97 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* OUT */
98 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* OUT_REVERSE */
99 { 0, 0 }, /* ATOP */
100 { 0, 0 }, /* ATOP_REVERSE */
101 { 0, 0 }, /* XOR */
102 { ITER_LOCALIZED_ALPHA, ITER_LOCALIZED_ALPHA }, /* ADD */
103 { 0, 0 }, /* SATURATE */
104 };
105
106 #define SCANLINE_BUFFER_LENGTH 8192
107
108 static void
general_composite_rect(pixman_implementation_t * imp,pixman_composite_info_t * info)109 general_composite_rect (pixman_implementation_t *imp,
110 pixman_composite_info_t *info)
111 {
112 PIXMAN_COMPOSITE_ARGS (info);
113 uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
114 uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
115 uint8_t *src_buffer, *mask_buffer, *dest_buffer;
116 pixman_iter_t src_iter, mask_iter, dest_iter;
117 pixman_combine_32_func_t compose;
118 pixman_bool_t component_alpha;
119 iter_flags_t narrow, src_iter_flags;
120 int Bpp;
121 int i;
122
123 if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
124 (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
125 (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
126 {
127 narrow = ITER_NARROW;
128 Bpp = 4;
129 }
130 else
131 {
132 narrow = 0;
133 Bpp = 16;
134 }
135
136 if (width * Bpp > SCANLINE_BUFFER_LENGTH)
137 {
138 scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
139
140 if (!scanline_buffer)
141 return;
142 }
143
144 src_buffer = scanline_buffer;
145 mask_buffer = src_buffer + width * Bpp;
146 dest_buffer = mask_buffer + width * Bpp;
147
148 if (!narrow)
149 {
150 /* To make sure there aren't any NANs in the buffers */
151 memset (src_buffer, 0, width * Bpp);
152 memset (mask_buffer, 0, width * Bpp);
153 memset (dest_buffer, 0, width * Bpp);
154 }
155
156 /* src iter */
157 src_iter_flags = narrow | op_flags[op].src;
158
159 _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
160 src_x, src_y, width, height,
161 src_buffer, src_iter_flags, info->src_flags);
162
163 /* mask iter */
164 if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
165 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
166 {
167 /* If it doesn't matter what the source is, then it doesn't matter
168 * what the mask is
169 */
170 mask_image = NULL;
171 }
172
173 component_alpha =
174 mask_image &&
175 mask_image->common.type == BITS &&
176 mask_image->common.component_alpha &&
177 PIXMAN_FORMAT_RGB (mask_image->bits.format);
178
179 _pixman_implementation_src_iter_init (
180 imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
181 mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
182
183 /* dest iter */
184 _pixman_implementation_dest_iter_init (
185 imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
186 dest_buffer, narrow | op_flags[op].dst, info->dest_flags);
187
188 compose = _pixman_implementation_lookup_combiner (
189 imp->toplevel, op, component_alpha, narrow);
190
191 for (i = 0; i < height; ++i)
192 {
193 uint32_t *s, *m, *d;
194
195 m = mask_iter.get_scanline (&mask_iter, NULL);
196 s = src_iter.get_scanline (&src_iter, m);
197 d = dest_iter.get_scanline (&dest_iter, NULL);
198
199 compose (imp->toplevel, op, d, s, m, width);
200
201 dest_iter.write_back (&dest_iter);
202 }
203
204 if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
205 free (scanline_buffer);
206 }
207
208 static const pixman_fast_path_t general_fast_path[] =
209 {
210 { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
211 { PIXMAN_OP_NONE }
212 };
213
214 pixman_implementation_t *
_pixman_implementation_create_general(void)215 _pixman_implementation_create_general (void)
216 {
217 pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
218
219 _pixman_setup_combiner_functions_32 (imp);
220 _pixman_setup_combiner_functions_float (imp);
221
222 imp->src_iter_init = general_src_iter_init;
223 imp->dest_iter_init = general_dest_iter_init;
224
225 return imp;
226 }
227
228