1 /**************************************************************************
2 *
3 * Copyright 2008 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 /**
29 * Rectangle-related helper functions.
30 */
31
32
33 #include "util/u_format.h"
34 #include "util/u_rect.h"
35 #include "util/u_pack_color.h"
36
37
38 /**
39 * Copy 2D rect from one place to another.
40 * Position and sizes are in pixels.
41 * src_stride may be negative to do vertical flip of pixels from source.
42 */
43 void
util_copy_rect(ubyte * dst,enum pipe_format format,unsigned dst_stride,unsigned dst_x,unsigned dst_y,unsigned width,unsigned height,const ubyte * src,int src_stride,unsigned src_x,unsigned src_y)44 util_copy_rect(ubyte * dst,
45 enum pipe_format format,
46 unsigned dst_stride,
47 unsigned dst_x,
48 unsigned dst_y,
49 unsigned width,
50 unsigned height,
51 const ubyte * src,
52 int src_stride,
53 unsigned src_x,
54 unsigned src_y)
55 {
56 unsigned i;
57 int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
58 int blocksize = util_format_get_blocksize(format);
59 int blockwidth = util_format_get_blockwidth(format);
60 int blockheight = util_format_get_blockheight(format);
61
62 assert(blocksize > 0);
63 assert(blockwidth > 0);
64 assert(blockheight > 0);
65
66 dst_x /= blockwidth;
67 dst_y /= blockheight;
68 width = (width + blockwidth - 1)/blockwidth;
69 height = (height + blockheight - 1)/blockheight;
70 src_x /= blockwidth;
71 src_y /= blockheight;
72
73 dst += dst_x * blocksize;
74 src += src_x * blocksize;
75 dst += dst_y * dst_stride;
76 src += src_y * src_stride_pos;
77 width *= blocksize;
78
79 if (width == dst_stride && width == src_stride)
80 memcpy(dst, src, height * width);
81 else {
82 for (i = 0; i < height; i++) {
83 memcpy(dst, src, width);
84 dst += dst_stride;
85 src += src_stride;
86 }
87 }
88 }
89
90 void
util_fill_rect(ubyte * dst,enum pipe_format format,unsigned dst_stride,unsigned dst_x,unsigned dst_y,unsigned width,unsigned height,union util_color * uc)91 util_fill_rect(ubyte * dst,
92 enum pipe_format format,
93 unsigned dst_stride,
94 unsigned dst_x,
95 unsigned dst_y,
96 unsigned width,
97 unsigned height,
98 union util_color *uc)
99 {
100 const struct util_format_description *desc = util_format_description(format);
101 unsigned i, j;
102 unsigned width_size;
103 int blocksize = desc->block.bits / 8;
104 int blockwidth = desc->block.width;
105 int blockheight = desc->block.height;
106
107 assert(blocksize > 0);
108 assert(blockwidth > 0);
109 assert(blockheight > 0);
110
111 dst_x /= blockwidth;
112 dst_y /= blockheight;
113 width = (width + blockwidth - 1)/blockwidth;
114 height = (height + blockheight - 1)/blockheight;
115
116 dst += dst_x * blocksize;
117 dst += dst_y * dst_stride;
118 width_size = width * blocksize;
119
120 switch (blocksize) {
121 case 1:
122 if(dst_stride == width_size)
123 memset(dst, uc->ub, height * width_size);
124 else {
125 for (i = 0; i < height; i++) {
126 memset(dst, uc->ub, width_size);
127 dst += dst_stride;
128 }
129 }
130 break;
131 case 2:
132 for (i = 0; i < height; i++) {
133 uint16_t *row = (uint16_t *)dst;
134 for (j = 0; j < width; j++)
135 *row++ = uc->us;
136 dst += dst_stride;
137 }
138 break;
139 case 4:
140 for (i = 0; i < height; i++) {
141 uint32_t *row = (uint32_t *)dst;
142 for (j = 0; j < width; j++)
143 *row++ = uc->ui;
144 dst += dst_stride;
145 }
146 break;
147 case 8:
148 case 12:
149 case 16:
150 case 24:
151 case 32:
152 for (i = 0; i < height; i++) {
153 ubyte *row = dst;
154 for (j = 0; j < width; j++) {
155 memcpy(row, uc, blocksize);
156 row += blocksize;
157 }
158 dst += dst_stride;
159 }
160 break;
161 default:
162 assert(0);
163 break;
164 }
165 }
166