pixman-general.c revision 317c648b 
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 <assert.h>
33#include <limits.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include "pixman-private.h"
38#include "pixman-combine32.h"
39#include "pixman-private.h"
40
41#define SCANLINE_BUFFER_LENGTH 8192
42
43static void
44general_composite_rect  (pixman_implementation_t *imp,
45			 pixman_op_t              op,
46			 pixman_image_t          *src,
47			 pixman_image_t          *mask,
48			 pixman_image_t          *dest,
49			 int32_t                  src_x,
50			 int32_t                  src_y,
51			 int32_t                  mask_x,
52			 int32_t                  mask_y,
53			 int32_t                  dest_x,
54			 int32_t                  dest_y,
55			 int32_t                  width,
56			 int32_t                  height)
57{
58    return_if_fail (src != NULL);
59    return_if_fail (dest != NULL);
60
61    uint8_t stack_scanline_buffer[SCANLINE_BUFFER_LENGTH * 3];
62    const pixman_format_code_t srcFormat = src->type == BITS ? src->bits.format : 0;
63    const pixman_format_code_t maskFormat = mask && mask->type == BITS ? mask->bits.format : 0;
64    const pixman_format_code_t destFormat = dest->type == BITS ? dest->bits.format : 0;
65    const int srcWide = PIXMAN_FORMAT_16BPC(srcFormat);
66    const int maskWide = mask && PIXMAN_FORMAT_16BPC(maskFormat);
67    const int destWide = PIXMAN_FORMAT_16BPC(destFormat);
68    const int wide = srcWide || maskWide || destWide;
69    const int Bpp = wide ? 8 : 4;
70    uint8_t *scanline_buffer = stack_scanline_buffer;
71    uint8_t *src_buffer, *mask_buffer, *dest_buffer;
72    scanFetchProc fetchSrc = NULL, fetchMask = NULL, fetchDest = NULL;
73    pixman_combine_32_func_t compose;
74    scanStoreProc store;
75    source_pict_class_t srcClass, maskClass;
76    pixman_bool_t component_alpha;
77    uint32_t *bits;
78    int32_t stride;
79    int i;
80
81    if (width * Bpp > SCANLINE_BUFFER_LENGTH)
82    {
83	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
84
85	if (!scanline_buffer)
86	    return;
87    }
88
89    src_buffer = scanline_buffer;
90    mask_buffer = src_buffer + width * Bpp;
91    dest_buffer = mask_buffer + width * Bpp;
92
93    srcClass = _pixman_image_classify (src,
94				       src_x, src_y,
95				       width, height);
96
97    maskClass = SOURCE_IMAGE_CLASS_UNKNOWN;
98    if (mask)
99    {
100	maskClass = _pixman_image_classify (mask,
101					    src_x, src_y,
102					    width, height);
103    }
104
105    if (op == PIXMAN_OP_CLEAR)
106        fetchSrc = NULL;
107    else if (wide)
108	fetchSrc = _pixman_image_get_scanline_64;
109    else
110	fetchSrc = _pixman_image_get_scanline_32;
111
112    if (!mask || op == PIXMAN_OP_CLEAR)
113	fetchMask = NULL;
114    else if (wide)
115	fetchMask = _pixman_image_get_scanline_64;
116    else
117	fetchMask = _pixman_image_get_scanline_32;
118
119    if (op == PIXMAN_OP_CLEAR || op == PIXMAN_OP_SRC)
120	fetchDest = NULL;
121    else if (wide)
122	fetchDest = _pixman_image_get_scanline_64;
123    else
124	fetchDest = _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	fetchSrc			&&
158	fetchMask			&&
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 (!fetchMask)
183	mask_buffer = NULL;
184
185    for (i = 0; i < height; ++i)
186    {
187	/* fill first half of scanline with source */
188	if (fetchSrc)
189	{
190	    if (fetchMask)
191	    {
192		/* fetch mask before source so that fetching of
193		   source can be optimized */
194		fetchMask (mask, mask_x, mask_y + i,
195			   width, (void *)mask_buffer, 0, 0);
196
197		if (maskClass == SOURCE_IMAGE_CLASS_HORIZONTAL)
198		    fetchMask = NULL;
199	    }
200
201	    if (srcClass == SOURCE_IMAGE_CLASS_HORIZONTAL)
202	    {
203		fetchSrc (src, src_x, src_y + i,
204			  width, (void *)src_buffer, 0, 0);
205		fetchSrc = NULL;
206	    }
207	    else
208	    {
209		fetchSrc (src, src_x, src_y + i,
210			  width, (void *)src_buffer, (void *)mask_buffer,
211			  0xffffffff);
212	    }
213	}
214	else if (fetchMask)
215	{
216	    fetchMask (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 (fetchDest)
224		fetchDest (dest, dest_x, dest_y + i,
225			   width, (void *)dest_buffer, 0, 0);
226
227	    /* blend */
228	    compose (imp->toplevel, op, (void *)dest_buffer, (void *)src_buffer, (void *)mask_buffer, width);
229
230	    /* write back */
231	    store (&(dest->bits), dest_x, dest_y + i, width,
232		   (void *)dest_buffer);
233	}
234	else
235	{
236	    /* blend */
237	    compose (imp->toplevel, op, bits + (dest_y + i) * stride +
238		     dest_x,
239		     (void *)src_buffer, (void *)mask_buffer, width);
240	}
241    }
242
243    if (scanline_buffer != stack_scanline_buffer)
244	free (scanline_buffer);
245}
246
247static void
248general_composite (pixman_implementation_t *	imp,
249		   pixman_op_t			op,
250		   pixman_image_t *		src,
251		   pixman_image_t *		mask,
252		   pixman_image_t *		dest,
253		   int32_t			src_x,
254		   int32_t			src_y,
255		   int32_t			mask_x,
256		   int32_t			mask_y,
257		   int32_t			dest_x,
258		   int32_t			dest_y,
259		   int32_t			width,
260		   int32_t			height)
261{
262    pixman_bool_t srcRepeat = src->type == BITS && src->common.repeat == PIXMAN_REPEAT_NORMAL;
263    pixman_bool_t maskRepeat = FALSE;
264    pixman_bool_t srcTransform = src->common.transform != NULL;
265    pixman_bool_t maskTransform = FALSE;
266
267    if (srcRepeat && srcTransform &&
268	src->bits.width == 1 &&
269	src->bits.height == 1)
270    {
271	srcTransform = FALSE;
272    }
273
274    if (mask && mask->type == BITS)
275    {
276	maskRepeat = mask->common.repeat == PIXMAN_REPEAT_NORMAL;
277
278	maskTransform = mask->common.transform != 0;
279	if (mask->common.filter == PIXMAN_FILTER_CONVOLUTION)
280	    maskTransform = TRUE;
281
282	if (maskRepeat && maskTransform &&
283	    mask->bits.width == 1 &&
284	    mask->bits.height == 1)
285	{
286	    maskTransform = FALSE;
287	}
288    }
289
290    /* CompositeGeneral optimizes 1x1 repeating images itself */
291    if (src->type == BITS &&
292	src->bits.width == 1 && src->bits.height == 1)
293    {
294	srcRepeat = FALSE;
295    }
296
297    if (mask && mask->type == BITS &&
298	mask->bits.width == 1 && mask->bits.height == 1)
299    {
300	maskRepeat = FALSE;
301    }
302
303    /* if we are transforming, repeats are handled in fbFetchTransformed */
304    if (srcTransform)
305	srcRepeat = FALSE;
306
307    if (maskTransform)
308	maskRepeat = FALSE;
309
310    _pixman_walk_composite_region (imp, op, src, mask, dest, src_x, src_y,
311				   mask_x, mask_y, dest_x, dest_y, width, height,
312				   srcRepeat, maskRepeat, general_composite_rect);
313}
314
315static pixman_bool_t
316general_blt (pixman_implementation_t *imp,
317	     uint32_t *src_bits,
318	     uint32_t *dst_bits,
319	     int src_stride,
320	     int dst_stride,
321	     int src_bpp,
322	     int dst_bpp,
323	     int src_x, int src_y,
324	     int dst_x, int dst_y,
325	     int width, int height)
326{
327    /* We can't blit unless we have sse2 or mmx */
328
329    return FALSE;
330}
331
332static pixman_bool_t
333general_fill (pixman_implementation_t *imp,
334	      uint32_t *bits,
335	      int stride,
336	      int bpp,
337	      int x,
338	      int y,
339	      int width,
340	      int height,
341	      uint32_t xor)
342{
343    return FALSE;
344}
345
346pixman_implementation_t *
347_pixman_implementation_create_general (void)
348{
349    pixman_implementation_t *imp = _pixman_implementation_create (NULL);
350
351    _pixman_setup_combiner_functions_32 (imp);
352    _pixman_setup_combiner_functions_64 (imp);
353
354    imp->composite = general_composite;
355    imp->blt = general_blt;
356    imp->fill = general_fill;
357
358    return imp;
359}
360