pixman-general.c revision 6ba797d6 
13da084b3Smrg/*
23da084b3Smrg * Copyright © 2009 Red Hat, Inc.
33da084b3Smrg * Copyright © 2000 SuSE, Inc.
43da084b3Smrg * Copyright © 2007 Red Hat, Inc.
53da084b3Smrg * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
63da084b3Smrg *             2005 Lars Knoll & Zack Rusin, Trolltech
73da084b3Smrg *             2008 Aaron Plattner, NVIDIA Corporation
83da084b3Smrg *
93da084b3Smrg * Permission to use, copy, modify, distribute, and sell this software and its
103da084b3Smrg * documentation for any purpose is hereby granted without fee, provided that
113da084b3Smrg * the above copyright notice appear in all copies and that both that
123da084b3Smrg * 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
40static void
41general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
42{
43    pixman_image_t *image = iter->image;
44
45    if (image->type == SOLID)
46	_pixman_solid_fill_iter_init (image, iter);
47    else if (image->type == LINEAR)
48	_pixman_linear_gradient_iter_init (image, iter);
49    else if (image->type == RADIAL)
50	_pixman_radial_gradient_iter_init (image, iter);
51    else if (image->type == CONICAL)
52	_pixman_conical_gradient_iter_init (image, iter);
53    else if (image->type == BITS)
54	_pixman_bits_image_src_iter_init (image, iter);
55    else
56	_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
57}
58
59static void
60general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
61{
62    if (iter->image->type == BITS)
63    {
64	_pixman_bits_image_dest_iter_init (iter->image, iter);
65    }
66    else
67    {
68	_pixman_log_error (FUNC, "Trying to write to a non-writable image");
69    }
70}
71
72typedef struct op_info_t op_info_t;
73struct op_info_t
74{
75    uint8_t src, dst;
76};
77
78#define ITER_IGNORE_BOTH						\
79    (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
80
81static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
82{
83    /* Src                   Dst                   */
84    { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */
85    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */
86    { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */
87    { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */
88    { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */
89    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */
90    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */
91    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */
92    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */
93    { 0,                     0                     }, /* ATOP */
94    { 0,                     0                     }, /* ATOP_REVERSE */
95    { 0,                     0                     }, /* XOR */
96    { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */
97    { 0,                     0                     }, /* SATURATE */
98};
99
100#define SCANLINE_BUFFER_LENGTH 8192
101
102static void
103general_composite_rect  (pixman_implementation_t *imp,
104                         pixman_composite_info_t *info)
105{
106    PIXMAN_COMPOSITE_ARGS (info);
107    uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
108    uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
109    uint8_t *src_buffer, *mask_buffer, *dest_buffer;
110    pixman_iter_t src_iter, mask_iter, dest_iter;
111    pixman_combine_32_func_t compose;
112    pixman_bool_t component_alpha;
113    iter_flags_t narrow, src_flags;
114    int Bpp;
115    int i;
116
117    if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT)		    &&
118	(!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
119	(dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
120    {
121	narrow = ITER_NARROW;
122	Bpp = 4;
123    }
124    else
125    {
126	narrow = 0;
127	Bpp = 8;
128    }
129
130    if (width * Bpp > SCANLINE_BUFFER_LENGTH)
131    {
132	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
133
134	if (!scanline_buffer)
135	    return;
136    }
137
138    src_buffer = scanline_buffer;
139    mask_buffer = src_buffer + width * Bpp;
140    dest_buffer = mask_buffer + width * Bpp;
141
142    /* src iter */
143    src_flags = narrow | op_flags[op].src;
144
145    _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
146					  src_x, src_y, width, height,
147					  src_buffer, src_flags);
148
149    /* mask iter */
150    if ((src_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
151	(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
152    {
153	/* If it doesn't matter what the source is, then it doesn't matter
154	 * what the mask is
155	 */
156	mask_image = NULL;
157    }
158
159    component_alpha =
160        mask_image			      &&
161        mask_image->common.type == BITS       &&
162        mask_image->common.component_alpha    &&
163        PIXMAN_FORMAT_RGB (mask_image->bits.format);
164
165    _pixman_implementation_src_iter_init (
166	imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
167	mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB));
168
169    /* dest iter */
170    _pixman_implementation_dest_iter_init (
171	imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
172	dest_buffer, narrow | op_flags[op].dst);
173
174    if (narrow)
175    {
176	if (component_alpha)
177	    compose = _pixman_implementation_combine_32_ca;
178	else
179	    compose = _pixman_implementation_combine_32;
180    }
181    else
182    {
183	if (component_alpha)
184	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
185	else
186	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
187    }
188
189    if (!compose)
190	return;
191
192    for (i = 0; i < height; ++i)
193    {
194	uint32_t *s, *m, *d;
195
196	m = mask_iter.get_scanline (&mask_iter, NULL);
197	s = src_iter.get_scanline (&src_iter, m);
198	d = dest_iter.get_scanline (&dest_iter, NULL);
199
200	compose (imp->toplevel, op, d, s, m, width);
201
202	dest_iter.write_back (&dest_iter);
203    }
204
205    if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
206	free (scanline_buffer);
207}
208
209static const pixman_fast_path_t general_fast_path[] =
210{
211    { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any,	0, PIXMAN_any, 0, general_composite_rect },
212    { PIXMAN_OP_NONE }
213};
214
215static pixman_bool_t
216general_blt (pixman_implementation_t *imp,
217             uint32_t *               src_bits,
218             uint32_t *               dst_bits,
219             int                      src_stride,
220             int                      dst_stride,
221             int                      src_bpp,
222             int                      dst_bpp,
223             int                      src_x,
224             int                      src_y,
225             int                      dest_x,
226             int                      dest_y,
227             int                      width,
228             int                      height)
229{
230    /* We can't blit unless we have sse2 or mmx */
231
232    return FALSE;
233}
234
235static pixman_bool_t
236general_fill (pixman_implementation_t *imp,
237              uint32_t *               bits,
238              int                      stride,
239              int                      bpp,
240              int                      x,
241              int                      y,
242              int                      width,
243              int                      height,
244              uint32_t xor)
245{
246    return FALSE;
247}
248
249pixman_implementation_t *
250_pixman_implementation_create_general (void)
251{
252    pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
253
254    _pixman_setup_combiner_functions_32 (imp);
255    _pixman_setup_combiner_functions_64 (imp);
256
257    imp->blt = general_blt;
258    imp->fill = general_fill;
259    imp->src_iter_init = general_src_iter_init;
260    imp->dest_iter_init = general_dest_iter_init;
261
262    return imp;
263}
264
265