nengel@2: /*
nengel@2:  * rectangle filling function
nengel@2:  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
nengel@2:  *
nengel@2:  * This file is part of FFmpeg.
nengel@2:  *
nengel@2:  * FFmpeg is free software; you can redistribute it and/or
nengel@2:  * modify it under the terms of the GNU Lesser General Public
nengel@2:  * License as published by the Free Software Foundation; either
nengel@2:  * version 2.1 of the License, or (at your option) any later version.
nengel@2:  *
nengel@2:  * FFmpeg is distributed in the hope that it will be useful,
nengel@2:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nengel@2:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
nengel@2:  * Lesser General Public License for more details.
nengel@2:  *
nengel@2:  * You should have received a copy of the GNU Lesser General Public
nengel@2:  * License along with FFmpeg; if not, write to the Free Software
nengel@2:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
nengel@2:  */
nengel@2: 
nengel@2: /**
nengel@2:  * @file
nengel@2:  * useful rectangle filling function
nengel@2:  * @author Michael Niedermayer <michaelni@gmx.at>
nengel@2:  */
nengel@2: 
nengel@2: #ifndef AVCODEC_RECTANGLE_H
nengel@2: #define AVCODEC_RECTANGLE_H
nengel@2: 
nengel@2: #include <assert.h>
nengel@2: 
nengel@2: #define STRIDE_ALIGN 16
nengel@2: 
nengel@2: 
nengel@2: /**
nengel@2:  * fill a rectangle.
nengel@2:  * @param h height of the rectangle, should be a constant
nengel@2:  * @param w width of the rectangle, should be a constant
nengel@2:  * @param size the size of val (1, 2 or 4), should be a constant
nengel@2:  */
nengel@2: static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
nengel@2:     uint8_t *p= (uint8_t*)vp;
nengel@2:     assert(size==1 || size==2 || size==4);
nengel@2:     assert(w<=4);
nengel@2: 
nengel@2:     w      *= size;
nengel@2:     stride *= size;
nengel@2: 
nengel@2:     assert((((long)vp)&(FFMIN(w, STRIDE_ALIGN)-1)) == 0);
nengel@2:     assert((stride&(w-1))==0);
nengel@2:     if(w==2){
nengel@2:         const uint16_t v= size==4 ? val : val*0x0101;
nengel@2:         *(uint16_t*)(p + 0*stride)= v;
nengel@2:         if(h==1) return;
nengel@2:         *(uint16_t*)(p + 1*stride)= v;
nengel@2:         if(h==2) return;
nengel@2:         *(uint16_t*)(p + 2*stride)= v;
nengel@2:         *(uint16_t*)(p + 3*stride)= v;
nengel@2:     }else if(w==4){
nengel@2:         const uint32_t v= size==4 ? val : size==2 ? val*0x00010001 : val*0x01010101;
nengel@2:         *(uint32_t*)(p + 0*stride)= v;
nengel@2:         if(h==1) return;
nengel@2:         *(uint32_t*)(p + 1*stride)= v;
nengel@2:         if(h==2) return;
nengel@2:         *(uint32_t*)(p + 2*stride)= v;
nengel@2:         *(uint32_t*)(p + 3*stride)= v;
nengel@2:     }else if(w==8){
nengel@2:         const uint64_t v=  size==2 ? val*0x0001000100010001ULL : val*0x0100000001ULL;
nengel@2:         *(uint64_t*)(p + 0*stride)= v;
nengel@2:         if(h==1) return;
nengel@2:         *(uint64_t*)(p + 1*stride)= v;
nengel@2:         if(h==2) return;
nengel@2:         *(uint64_t*)(p + 2*stride)= v;
nengel@2:         *(uint64_t*)(p + 3*stride)= v;
nengel@2:     }else if(w==16){
nengel@2:         const uint64_t v= val*0x0100000001ULL;
nengel@2:         *(uint64_t*)(p + 0+0*stride)= v;
nengel@2:         *(uint64_t*)(p + 8+0*stride)= v;
nengel@2:         *(uint64_t*)(p + 0+1*stride)= v;
nengel@2:         *(uint64_t*)(p + 8+1*stride)= v;
nengel@2:         if(h==2) return;
nengel@2:         *(uint64_t*)(p + 0+2*stride)= v;
nengel@2:         *(uint64_t*)(p + 8+2*stride)= v;
nengel@2:         *(uint64_t*)(p + 0+3*stride)= v;
nengel@2:         *(uint64_t*)(p + 8+3*stride)= v;
nengel@2:     }else
nengel@2:         assert(0);
nengel@2:     assert(h==4);
nengel@2: }
nengel@2: 
nengel@2: #endif /* AVCODEC_RECTANGLE_H */