sp_surface.c revision c9ed86a96483063f3d6789ed16645a3dca77d726 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "pipe/p_defines.h"
29#include "pipe/p_util.h"
30#include "pipe/p_inlines.h"
31#include "pipe/p_winsys.h"
32#include "util/p_tile.h"
33#include "sp_context.h"
34#include "sp_surface.h"
35
36
37
38/* Assumes all values are within bounds -- no checking at this level -
39 * do it higher up if required.
40 */
41static void
42sp_surface_copy(struct pipe_context *pipe,
43                unsigned do_flip,
44		struct pipe_surface *dst,
45		unsigned dstx, unsigned dsty,
46		struct pipe_surface *src,
47		unsigned srcx, unsigned srcy, unsigned width, unsigned height)
48{
49   assert( dst->cpp == src->cpp );
50   void *dst_map = pipe->screen->surface_map( pipe->screen,
51                                              dst,
52                                              PIPE_BUFFER_USAGE_GPU_WRITE );
53
54   const void *src_map = pipe->screen->surface_map( pipe->screen,
55                                                    src,
56                                                    PIPE_BUFFER_USAGE_GPU_READ );
57
58   assert(src_map && dst_map);
59
60   pipe_copy_rect(dst_map,
61                  dst->cpp,
62                  dst->pitch,
63                  dstx, dsty,
64                  width, height,
65                  src_map,
66                  do_flip ? -(int) src->pitch : src->pitch,
67                  srcx, do_flip ? 1 - srcy - height : srcy);
68
69   pipe->screen->surface_unmap(pipe->screen, src);
70   pipe->screen->surface_unmap(pipe->screen, dst);
71}
72
73
74static void *
75get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
76{
77   return (char *)dst_map + (y * dst->pitch + x) * dst->cpp;
78}
79
80
81#define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
82
83
84/**
85 * Fill a rectangular sub-region.  Need better logic about when to
86 * push buffers into AGP - will currently do so whenever possible.
87 */
88static void
89sp_surface_fill(struct pipe_context *pipe,
90		struct pipe_surface *dst,
91		unsigned dstx, unsigned dsty,
92		unsigned width, unsigned height, unsigned value)
93{
94   unsigned i, j;
95   void *dst_map = pipe->screen->surface_map( pipe->screen,
96                                              dst,
97                                              PIPE_BUFFER_USAGE_GPU_WRITE );
98
99   assert(dst->pitch > 0);
100   assert(width <= dst->pitch);
101
102
103   switch (dst->cpp) {
104   case 1:
105      {
106	 ubyte *row = get_pointer(dst, dst_map, dstx, dsty);
107         for (i = 0; i < height; i++) {
108            memset(row, value, width);
109	 row += dst->pitch;
110         }
111      }
112      break;
113   case 2:
114      {
115         ushort *row = get_pointer(dst, dst_map, dstx, dsty);
116         for (i = 0; i < height; i++) {
117            for (j = 0; j < width; j++)
118               row[j] = (ushort) value;
119            row += dst->pitch;
120         }
121      }
122      break;
123   case 4:
124      {
125         unsigned *row = get_pointer(dst, dst_map, dstx, dsty);
126         for (i = 0; i < height; i++) {
127            for (j = 0; j < width; j++)
128               row[j] = value;
129            row += dst->pitch;
130         }
131      }
132      break;
133   case 8:
134      {
135         /* expand the 4-byte clear value to an 8-byte value */
136         ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
137         ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
138         ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
139         ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
140         ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
141         val0 = (val0 << 8) | val0;
142         val1 = (val1 << 8) | val1;
143         val2 = (val2 << 8) | val2;
144         val3 = (val3 << 8) | val3;
145         for (i = 0; i < height; i++) {
146            for (j = 0; j < width; j++) {
147               row[j*4+0] = val0;
148               row[j*4+1] = val1;
149               row[j*4+2] = val2;
150               row[j*4+3] = val3;
151            }
152            row += dst->pitch * 4;
153         }
154      }
155      break;
156   default:
157      assert(0);
158      break;
159   }
160
161   pipe->screen->surface_unmap(pipe->screen, dst);
162}
163
164
165void
166sp_init_surface_functions(struct softpipe_context *sp)
167{
168   sp->pipe.surface_copy = sp_surface_copy;
169   sp->pipe.surface_fill = sp_surface_fill;
170}
171