pixman-general.c revision d0321353 
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#include <config.h>
29#include <stdlib.h>
30#include <string.h>
31#include <math.h>
32#include <limits.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include "pixman-private.h"
37#include "pixman-combine32.h"
38#include "pixman-private.h"
39
40#define SCANLINE_BUFFER_LENGTH 8192
41
42static void
43general_composite_rect  (pixman_implementation_t *imp,
44                         pixman_op_t              op,
45                         pixman_image_t *         src,
46                         pixman_image_t *         mask,
47                         pixman_image_t *         dest,
48                         int32_t                  src_x,
49                         int32_t                  src_y,
50                         int32_t                  mask_x,
51                         int32_t                  mask_y,
52                         int32_t                  dest_x,
53                         int32_t                  dest_y,
54                         int32_t                  width,
55                         int32_t                  height)
56{
57    uint8_t stack_scanline_buffer[SCANLINE_BUFFER_LENGTH * 3];
58    const pixman_format_code_t src_format =
59	src->type == BITS ? src->bits.format : 0;
60    const pixman_format_code_t mask_format =
61	mask && mask->type == BITS ? mask->bits.format : 0;
62    const pixman_format_code_t dest_format =
63	dest->type == BITS ? dest->bits.format : 0;
64    const int src_wide = PIXMAN_FORMAT_IS_WIDE (src_format);
65    const int mask_wide = mask && PIXMAN_FORMAT_IS_WIDE (mask_format);
66    const int dest_wide = PIXMAN_FORMAT_IS_WIDE (dest_format);
67    const int wide = src_wide || mask_wide || dest_wide;
68    const int Bpp = wide ? 8 : 4;
69    uint8_t *scanline_buffer = stack_scanline_buffer;
70    uint8_t *src_buffer, *mask_buffer, *dest_buffer;
71    fetch_scanline_t fetch_src = NULL, fetch_mask = NULL, fetch_dest = NULL;
72    pixman_combine_32_func_t compose;
73    store_scanline_t store;
74    source_pict_class_t src_class, mask_class;
75    pixman_bool_t component_alpha;
76    uint32_t *bits;
77    int32_t stride;
78    int i;
79
80    if (width * Bpp > SCANLINE_BUFFER_LENGTH)
81    {
82	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
83
84	if (!scanline_buffer)
85	    return;
86    }
87
88    src_buffer = scanline_buffer;
89    mask_buffer = src_buffer + width * Bpp;
90    dest_buffer = mask_buffer + width * Bpp;
91
92    src_class = _pixman_image_classify (src,
93                                        src_x, src_y,
94                                        width, height);
95
96    mask_class = SOURCE_IMAGE_CLASS_UNKNOWN;
97
98    if (mask)
99    {
100	mask_class = _pixman_image_classify (mask,
101	                                     src_x, src_y,
102	                                     width, height);
103    }
104
105    if (op == PIXMAN_OP_CLEAR)
106	fetch_src = NULL;
107    else if (wide)
108	fetch_src = _pixman_image_get_scanline_64;
109    else
110	fetch_src = _pixman_image_get_scanline_32;
111
112    if (!mask || op == PIXMAN_OP_CLEAR)
113	fetch_mask = NULL;
114    else if (wide)
115	fetch_mask = _pixman_image_get_scanline_64;
116    else
117	fetch_mask = _pixman_image_get_scanline_32;
118
119    if (op == PIXMAN_OP_CLEAR || op == PIXMAN_OP_SRC)
120	fetch_dest = NULL;
121    else if (wide)
122	fetch_dest = _pixman_image_get_scanline_64;
123    else
124	fetch_dest = _pixman_image_get_scanline_32;
125
126    if (wide)
127	store = _pixman_image_store_scanline_64;
128    else
129	store = _pixman_image_store_scanline_32;
130
131    /* Skip the store step and composite directly into the
132     * destination if the output format of the compose func matches
133     * the destination format.
134     */
135    if (!wide &&
136        !dest->common.alpha_map &&
137        !dest->common.write_func &&
138        (op == PIXMAN_OP_ADD || op == PIXMAN_OP_OVER) &&
139        (dest->bits.format == PIXMAN_a8r8g8b8 ||
140         dest->bits.format == PIXMAN_x8r8g8b8))
141    {
142	store = NULL;
143    }
144
145    if (!store)
146    {
147	bits = dest->bits.bits;
148	stride = dest->bits.rowstride;
149    }
150    else
151    {
152	bits = NULL;
153	stride = 0;
154    }
155
156    component_alpha =
157        fetch_src                       &&
158        fetch_mask                      &&
159        mask                            &&
160        mask->common.type == BITS       &&
161        mask->common.component_alpha    &&
162        PIXMAN_FORMAT_RGB (mask->bits.format);
163
164    if (wide)
165    {
166	if (component_alpha)
167	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
168	else
169	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
170    }
171    else
172    {
173	if (component_alpha)
174	    compose = _pixman_implementation_combine_32_ca;
175	else
176	    compose = _pixman_implementation_combine_32;
177    }
178
179    if (!compose)
180	return;
181
182    if (!fetch_mask)
183	mask_buffer = NULL;
184
185    for (i = 0; i < height; ++i)
186    {
187	/* fill first half of scanline with source */
188	if (fetch_src)
189	{
190	    if (fetch_mask)
191	    {
192		/* fetch mask before source so that fetching of
193		   source can be optimized */
194		fetch_mask (mask, mask_x, mask_y + i,
195		            width, (void *)mask_buffer, 0, 0);
196
197		if (mask_class == SOURCE_IMAGE_CLASS_HORIZONTAL)
198		    fetch_mask = NULL;
199	    }
200
201	    if (src_class == SOURCE_IMAGE_CLASS_HORIZONTAL)
202	    {
203		fetch_src (src, src_x, src_y + i,
204		           width, (void *)src_buffer, 0, 0);
205		fetch_src = NULL;
206	    }
207	    else
208	    {
209		fetch_src (src, src_x, src_y + i,
210		           width, (void *)src_buffer, (void *)mask_buffer,
211		           0xffffffff);
212	    }
213	}
214	else if (fetch_mask)
215	{
216	    fetch_mask (mask, mask_x, mask_y + i,
217	                width, (void *)mask_buffer, 0, 0);
218	}
219
220	if (store)
221	{
222	    /* fill dest into second half of scanline */
223	    if (fetch_dest)
224	    {
225		fetch_dest (dest, dest_x, dest_y + i,
226		            width, (void *)dest_buffer, 0, 0);
227	    }
228
229	    /* blend */
230	    compose (imp->toplevel, op,
231		     (void *)dest_buffer,
232		     (void *)src_buffer,
233		     (void *)mask_buffer,
234		     width);
235
236	    /* write back */
237	    store (&(dest->bits), dest_x, dest_y + i, width,
238	           (void *)dest_buffer);
239	}
240	else
241	{
242	    /* blend */
243	    compose (imp->toplevel, op,
244		     bits + (dest_y + i) * stride + dest_x,
245	             (void *)src_buffer, (void *)mask_buffer, width);
246	}
247    }
248
249    if (scanline_buffer != stack_scanline_buffer)
250	free (scanline_buffer);
251}
252
253static void
254general_composite (pixman_implementation_t * imp,
255                   pixman_op_t               op,
256                   pixman_image_t *          src,
257                   pixman_image_t *          mask,
258                   pixman_image_t *          dest,
259                   int32_t                   src_x,
260                   int32_t                   src_y,
261                   int32_t                   mask_x,
262                   int32_t                   mask_y,
263                   int32_t                   dest_x,
264                   int32_t                   dest_y,
265                   int32_t                   width,
266                   int32_t                   height)
267{
268    _pixman_walk_composite_region (imp, op, src, mask, dest, src_x, src_y,
269                                   mask_x, mask_y, dest_x, dest_y,
270				   width, height,
271                                   general_composite_rect);
272}
273
274static pixman_bool_t
275general_blt (pixman_implementation_t *imp,
276             uint32_t *               src_bits,
277             uint32_t *               dst_bits,
278             int                      src_stride,
279             int                      dst_stride,
280             int                      src_bpp,
281             int                      dst_bpp,
282             int                      src_x,
283             int                      src_y,
284             int                      dst_x,
285             int                      dst_y,
286             int                      width,
287             int                      height)
288{
289    /* We can't blit unless we have sse2 or mmx */
290
291    return FALSE;
292}
293
294static pixman_bool_t
295general_fill (pixman_implementation_t *imp,
296              uint32_t *               bits,
297              int                      stride,
298              int                      bpp,
299              int                      x,
300              int                      y,
301              int                      width,
302              int                      height,
303              uint32_t xor)
304{
305    return FALSE;
306}
307
308pixman_implementation_t *
309_pixman_implementation_create_general (void)
310{
311    pixman_implementation_t *imp = _pixman_implementation_create (NULL);
312
313    _pixman_setup_combiner_functions_32 (imp);
314    _pixman_setup_combiner_functions_64 (imp);
315
316    imp->composite = general_composite;
317    imp->blt = general_blt;
318    imp->fill = general_fill;
319
320    return imp;
321}
322
323