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 */
43void
44util_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
90void
91util_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