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 iter_flags_t rgb16;
121 int Bpp;
122 int i;
123
124 if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
125 (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
126 (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
127 {
128 narrow = ITER_NARROW;
129 Bpp = 4;
130 }
131 else
132 {
133 narrow = 0;
134 Bpp = 16;
135 }
136
137 // XXX: This special casing is bad. Ideally, we'd keep the general code general perhaps
138 // by having it deal more specifically with different intermediate formats
139 if (
140 (dest_image->common.flags & FAST_PATH_16_FORMAT && (src_image->type == LINEAR || src_image->type == RADIAL)) &&
141 ( op == PIXMAN_OP_SRC ||
142 (op == PIXMAN_OP_OVER && (src_image->common.flags & FAST_PATH_IS_OPAQUE))
143 )
144 ) {
145 rgb16 = ITER_16;
146 } else {
147 rgb16 = 0;
148 }
149
150
151 if (width * Bpp > SCANLINE_BUFFER_LENGTH)
152 {
153 scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
154
155 if (!scanline_buffer)
156 return;
157 }
158
159 src_buffer = scanline_buffer;
160 mask_buffer = src_buffer + width * Bpp;
161 dest_buffer = mask_buffer + width * Bpp;
162
163 if (!narrow)
164 {
165 /* To make sure there aren't any NANs in the buffers */
166 memset (src_buffer, 0, width * Bpp);
167 memset (mask_buffer, 0, width * Bpp);
168 memset (dest_buffer, 0, width * Bpp);
169 }
170
171 /* src iter */
172 src_iter_flags = narrow | op_flags[op].src | rgb16;
173
174 _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
175 src_x, src_y, width, height,
176 src_buffer, src_iter_flags, info->src_flags);
177
178 /* mask iter */
179 if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
180 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
181 {
182 /* If it doesn't matter what the source is, then it doesn't matter
183 * what the mask is
184 */
185 mask_image = NULL;
186 }
187
188 component_alpha =
189 mask_image &&
190 mask_image->common.type == BITS &&
191 mask_image->common.component_alpha &&
192 PIXMAN_FORMAT_RGB (mask_image->bits.format);
193
194 _pixman_implementation_src_iter_init (
195 imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
196 mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
197
198 /* dest iter */
199 _pixman_implementation_dest_iter_init (
200 imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
201 dest_buffer, narrow | op_flags[op].dst | rgb16, info->dest_flags);
202
203 compose = _pixman_implementation_lookup_combiner (
204 imp->toplevel, op, component_alpha, narrow, !!rgb16);
205
206 for (i = 0; i < height; ++i)
207 {
208 uint32_t *s, *m, *d;
209
210 m = mask_iter.get_scanline (&mask_iter, NULL);
211 s = src_iter.get_scanline (&src_iter, m);
212 d = dest_iter.get_scanline (&dest_iter, NULL);
213
214 compose (imp->toplevel, op, d, s, m, width);
215
216 dest_iter.write_back (&dest_iter);
217 }
218
219 if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
220 free (scanline_buffer);
221 }
222
223 static const pixman_fast_path_t general_fast_path[] =
224 {
225 { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
226 { PIXMAN_OP_NONE }
227 };
228
229 pixman_implementation_t *
_pixman_implementation_create_general(void)230 _pixman_implementation_create_general (void)
231 {
232 pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
233
234 _pixman_setup_combiner_functions_16 (imp);
235 _pixman_setup_combiner_functions_32 (imp);
236 _pixman_setup_combiner_functions_float (imp);
237
238 imp->src_iter_init = general_src_iter_init;
239 imp->dest_iter_init = general_dest_iter_init;
240
241 return imp;
242 }
243
244