1/*
2 * rectangle filling function
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * useful rectangle filling function
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28#ifndef AVCODEC_RECTANGLE_H
29#define AVCODEC_RECTANGLE_H
30
31#include "config.h"
32#include "libavutil/common.h"
33#include "libavutil/avassert.h"
34
35/**
36 * fill a rectangle.
37 * @param h height of the rectangle, should be a constant
38 * @param w width of the rectangle, should be a constant
39 * @param size the size of val (1, 2 or 4), should be a constant
40 */
41static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
42    uint8_t *p= (uint8_t*)vp;
43    av_assert2(size==1 || size==2 || size==4);
44    av_assert2(w<=4);
45
46    w      *= size;
47    stride *= size;
48
49    av_assert2((((long)vp)&(FFMIN(w, 8<<(HAVE_NEON|ARCH_PPC|HAVE_MMX))-1)) == 0);
50    av_assert2((stride&(w-1))==0);
51    if(w==2){
52        const uint16_t v= size==4 ? val : val*0x0101;
53        *(uint16_t*)(p + 0*stride)= v;
54        if(h==1) return;
55        *(uint16_t*)(p + 1*stride)= v;
56        if(h==2) return;
57        *(uint16_t*)(p + 2*stride)= v;
58        *(uint16_t*)(p + 3*stride)= v;
59    }else if(w==4){
60        const uint32_t v= size==4 ? val : size==2 ? val*0x00010001 : val*0x01010101;
61        *(uint32_t*)(p + 0*stride)= v;
62        if(h==1) return;
63        *(uint32_t*)(p + 1*stride)= v;
64        if(h==2) return;
65        *(uint32_t*)(p + 2*stride)= v;
66        *(uint32_t*)(p + 3*stride)= v;
67    }else if(w==8){
68    //gcc can't optimize 64bit math on x86_32
69#if HAVE_FAST_64BIT
70        const uint64_t v=  size==2 ? val*0x0001000100010001ULL : val*0x0100000001ULL;
71        *(uint64_t*)(p + 0*stride)= v;
72        if(h==1) return;
73        *(uint64_t*)(p + 1*stride)= v;
74        if(h==2) return;
75        *(uint64_t*)(p + 2*stride)= v;
76        *(uint64_t*)(p + 3*stride)= v;
77    }else if(w==16){
78        const uint64_t v= val*0x0100000001ULL;
79        *(uint64_t*)(p + 0+0*stride)= v;
80        *(uint64_t*)(p + 8+0*stride)= v;
81        *(uint64_t*)(p + 0+1*stride)= v;
82        *(uint64_t*)(p + 8+1*stride)= v;
83        if(h==2) return;
84        *(uint64_t*)(p + 0+2*stride)= v;
85        *(uint64_t*)(p + 8+2*stride)= v;
86        *(uint64_t*)(p + 0+3*stride)= v;
87        *(uint64_t*)(p + 8+3*stride)= v;
88#else
89        const uint32_t v= size==2 ? val*0x00010001 : val;
90        *(uint32_t*)(p + 0+0*stride)= v;
91        *(uint32_t*)(p + 4+0*stride)= v;
92        if(h==1) return;
93        *(uint32_t*)(p + 0+1*stride)= v;
94        *(uint32_t*)(p + 4+1*stride)= v;
95        if(h==2) return;
96        *(uint32_t*)(p + 0+2*stride)= v;
97        *(uint32_t*)(p + 4+2*stride)= v;
98        *(uint32_t*)(p + 0+3*stride)= v;
99        *(uint32_t*)(p + 4+3*stride)= v;
100    }else if(w==16){
101        *(uint32_t*)(p + 0+0*stride)= val;
102        *(uint32_t*)(p + 4+0*stride)= val;
103        *(uint32_t*)(p + 8+0*stride)= val;
104        *(uint32_t*)(p +12+0*stride)= val;
105        *(uint32_t*)(p + 0+1*stride)= val;
106        *(uint32_t*)(p + 4+1*stride)= val;
107        *(uint32_t*)(p + 8+1*stride)= val;
108        *(uint32_t*)(p +12+1*stride)= val;
109        if(h==2) return;
110        *(uint32_t*)(p + 0+2*stride)= val;
111        *(uint32_t*)(p + 4+2*stride)= val;
112        *(uint32_t*)(p + 8+2*stride)= val;
113        *(uint32_t*)(p +12+2*stride)= val;
114        *(uint32_t*)(p + 0+3*stride)= val;
115        *(uint32_t*)(p + 4+3*stride)= val;
116        *(uint32_t*)(p + 8+3*stride)= val;
117        *(uint32_t*)(p +12+3*stride)= val;
118#endif
119    }else
120        av_assert2(0);
121    av_assert2(h==4);
122}
123
124#endif /* AVCODEC_RECTANGLE_H */
125