bmp files loader/writer.
This commit is contained in:
Jean-François DEL NERO
parent
ed2a200d4b
commit
fafd7fa578
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@ -0,0 +1,560 @@
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///////////////////////////////////////////////////////////////////////////////////
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//-------------------------------------------------------------------------------//
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//-------------------------------------------------------------------------------//
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//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
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//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
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//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
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//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
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//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
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//-------------------------------------------------------------------------------//
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//----------------------------------------------------- http://hxc2001.free.fr --//
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///////////////////////////////////////////////////////////////////////////////////
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// File : bmp_file.c
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// Contains: bmp image file loader / writer
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//
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// This file is part of rf-tools.
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//
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// Written by: Jean-François DEL NERO
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//
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// Copyright (C) 2022 Jean-François DEL NERO
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//
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// You are free to do what you want with this code.
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// A credit is always appreciated if you use it into your product :)
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//
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// Change History (most recent first):
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///////////////////////////////////////////////////////////////////////////////////
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "bmp_file.h"
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int bmp_load(char * file,bitmap_data * bdata)
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{
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FILE * f;
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int i,j;
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int xsize,ysize;
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int bitperpixel;
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int palettesize;
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unsigned int bitmapdataoffset,bitmapdatalinesize;
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unsigned char * linebuffer;
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BITMAPFILEHEADER bitmap_header;
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BITMAPINFOHEADER bitmap_info_header;
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RGBQUAD * palette;
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palette = NULL;
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linebuffer = NULL;
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f = fopen(file,"rb");
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if(f)
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{
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if( fread(&bitmap_header,sizeof(BITMAPFILEHEADER),1,f) != 1 )
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goto error;
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if( bitmap_header.bfType == 19778 )
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{
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if( fread(&bitmap_info_header,sizeof(BITMAPINFOHEADER),1,f) != 1 )
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goto error;
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xsize=bitmap_info_header.biWidth;
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ysize=bitmap_info_header.biHeight;
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bitperpixel=bitmap_info_header.biBitCount;
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if(!bitmap_info_header.biCompression)
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{
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// read palette
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switch(bitperpixel)
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{
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case 1:
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palettesize=2;
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break;
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case 4:
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palettesize=16;
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break;
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case 8:
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palettesize=256;
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break;
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case 24:
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palettesize=0;
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break;
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case 32:
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palettesize=0;
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break;
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default:
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palettesize=0;
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//non supported
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break;
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}
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palette=0;
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if(palettesize)
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{
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palette=(RGBQUAD *) malloc(palettesize*sizeof(RGBQUAD));
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if(!palette)
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goto error;
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memset(palette,0,palettesize*sizeof(RGBQUAD));
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fseek(f,sizeof(BITMAPFILEHEADER)+ bitmap_info_header.biSize ,SEEK_SET);
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if( fread(palette,palettesize*sizeof(RGBQUAD),1,f) != 1 )
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goto error;
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}
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bitmapdataoffset = sizeof(BITMAPFILEHEADER)+ bitmap_info_header.biSize + (palettesize*sizeof(RGBQUAD));
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fseek(f,bitmapdataoffset ,SEEK_SET);
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bdata->xsize = xsize;
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bdata->ysize = ysize;
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bdata->data = (uint32_t *)malloc(xsize*ysize*sizeof(uint32_t));
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if(!bdata->data)
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goto error;
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memset(bdata->data,0,xsize*ysize*sizeof(uint32_t));
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switch(bitperpixel)
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{
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case 1:
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if((xsize/8 + (xsize&7))&0x3)
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bitmapdatalinesize = (((xsize/8 + (xsize&7)) & (~0x3)) + 0x4);
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else
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bitmapdatalinesize = (xsize/8 + (xsize&7));
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linebuffer = (unsigned char *)malloc(bitmapdatalinesize);
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if(!linebuffer)
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goto error;
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for(i = 0; i < ysize; i++ )
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{
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fseek(f,bitmapdataoffset + (bitmapdatalinesize*i) ,SEEK_SET);
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if( fread(linebuffer,bitmapdatalinesize,1,f) != 1 )
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goto error;
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for(j=0;j<xsize;j++)
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{
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bdata->data[(xsize*((ysize-1)-i))+j]=palette[(linebuffer[(j/8)]>>(1*((7-(j))&7)))&0x1].rgbRed |
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palette[(linebuffer[(j/8)]>>(1*((7-(j))&7)))&0x1].rgbGreen<<8 |
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palette[(linebuffer[(j/8)]>>(1*((7-(j))&7)))&0x1].rgbBlue<<16;
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}
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}
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free(linebuffer);
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linebuffer = NULL;
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free(palette);
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palette = NULL;
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break;
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case 4:
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if((xsize/2 + (xsize&1))&0x3)
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bitmapdatalinesize = (((xsize/2 + (xsize&1)) & (~0x3)) + 0x4);
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else
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bitmapdatalinesize = (xsize/2 + (xsize&1));
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linebuffer=(unsigned char *) malloc(bitmapdatalinesize);
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if(!linebuffer)
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goto error;
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for(i=0;i<ysize;i++)
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{
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fseek(f,bitmapdataoffset + (bitmapdatalinesize*i) ,SEEK_SET);
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if( fread(linebuffer,bitmapdatalinesize,1,f) != 1 )
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goto error;
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for(j=0;j<xsize;j++)
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{
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bdata->data[(xsize*((ysize-1)-i))+j]=palette[(linebuffer[(j/2)]>>(4*((~j)&1)))&0xF].rgbRed |
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palette[(linebuffer[(j/2)]>>(4*((~j)&1)))&0xF].rgbGreen<<8 |
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palette[(linebuffer[(j/2)]>>(4*((~j)&1)))&0xF].rgbBlue<<16;
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}
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}
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free(linebuffer);
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linebuffer = NULL;
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free(palette);
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palette = NULL;
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break;
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case 8:
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if(xsize&0x3)
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bitmapdatalinesize = ((xsize & (~0x3)) + 0x4);
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else
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bitmapdatalinesize = xsize;
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linebuffer = (unsigned char *)malloc(bitmapdatalinesize);
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if(!linebuffer)
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goto error;
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for(i=0;i<ysize;i++)
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{
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fseek(f,bitmapdataoffset + (bitmapdatalinesize*i) ,SEEK_SET);
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if( fread(linebuffer,bitmapdatalinesize,1,f) != 1 )
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goto error;
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for(j=0;j<xsize;j++)
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{
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bdata->data[(xsize*((ysize-1)-i))+j]=palette[linebuffer[j]].rgbRed |
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palette[linebuffer[j]].rgbGreen<<8 |
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palette[linebuffer[j]].rgbBlue<<16;
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}
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}
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free(linebuffer);
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linebuffer = NULL;
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free(palette);
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palette = NULL;
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break;
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case 24:
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if((xsize*3)&0x3)
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bitmapdatalinesize=(((xsize*3) & (~0x3)) + 0x4);
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else
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bitmapdatalinesize=(xsize*3);
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linebuffer=(unsigned char *)malloc(bitmapdatalinesize);
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if(!linebuffer)
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goto error;
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for(i=0;i<ysize;i++)
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{
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fseek(f,bitmapdataoffset + (bitmapdatalinesize*i) ,SEEK_SET);
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if( fread(linebuffer,bitmapdatalinesize,1,f) != 1 )
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goto error;
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for(j=0;j<xsize;j++)
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{
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bdata->data[(xsize*((ysize-1)-i))+j]=linebuffer[j*3+2] |
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linebuffer[j*3+1]<<8 |
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linebuffer[j*3+0]<<16;
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}
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}
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free(linebuffer);
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linebuffer = NULL;
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break;
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case 32:
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if((xsize*4)&0x3)
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bitmapdatalinesize=(((xsize*4) & (~0x3)) + 0x4);
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else
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bitmapdatalinesize=(xsize*4);
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linebuffer=(unsigned char *)malloc(bitmapdatalinesize);
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if(!linebuffer)
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goto error;
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for(i=0;i<ysize;i++)
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{
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fseek(f,bitmapdataoffset + (bitmapdatalinesize*i) ,SEEK_SET);
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if( fread(linebuffer,bitmapdatalinesize,1,f) != 1 )
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goto error;
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for(j=0;j<xsize;j++)
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{
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bdata->data[(xsize*((ysize-1)-i))+j]=linebuffer[j*4+2] |
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linebuffer[j*4+1]<<8 |
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linebuffer[j*4+0]<<16;
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}
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}
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free(linebuffer);
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linebuffer = NULL;
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break;
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default:
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//non supported
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break;
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}
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}
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else
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{
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// non supported
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fclose(f);
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return -1;
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}
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}
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else
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{
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// non bitmap file
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fclose(f);
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return -2;
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}
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fclose(f);
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return 0; // ok
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}
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//file error
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return -3;
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error:
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if(f)
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fclose(f);
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if(palette)
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free(palette);
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if(linebuffer)
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free(linebuffer);
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return -3;
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}
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int bmp24b_write(char * file,bitmap_data * bdata)
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{
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FILE * f;
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int i,j;
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BITMAPFILEHEADER bitmap_header;
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BITMAPINFOHEADER bitmap_info_header;
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uint32_t bitmapdatalinesize;
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unsigned char * linebuffer;
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f = fopen(file,"wb");
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if(f)
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{
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memset(&bitmap_header,0,sizeof(BITMAPFILEHEADER));
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bitmap_header.bfType = 19778;
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bitmap_header.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
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bitmapdatalinesize = bdata->xsize*3;
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if(bitmapdatalinesize&0x3)
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bitmapdatalinesize = ((bitmapdatalinesize & (~0x3)) + 0x4);
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bitmap_header.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + (bitmapdatalinesize*bdata->ysize);
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fwrite(&bitmap_header,1,sizeof(BITMAPFILEHEADER),f);
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memset(&bitmap_info_header,0,sizeof(BITMAPINFOHEADER));
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bitmap_info_header.biSize = sizeof(BITMAPINFOHEADER);
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bitmap_info_header.biBitCount = 24;
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bitmap_info_header.biHeight = bdata->ysize;
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bitmap_info_header.biWidth = bdata->xsize;
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bitmap_info_header.biPlanes = 1;
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bitmap_info_header.biSizeImage = bitmapdatalinesize*bdata->ysize;
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fwrite(&bitmap_info_header,1,sizeof(BITMAPINFOHEADER),f);
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linebuffer = (unsigned char *)malloc(bitmapdatalinesize);
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memset(linebuffer,0,bitmapdatalinesize);
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for(i=0;i<bdata->ysize;i++)
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{
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for(j=0;j<bdata->xsize;j++)
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{
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linebuffer[(j*3)+2] = (unsigned char)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]) & 0xFF);
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linebuffer[(j*3)+1] = (unsigned char)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]>>8) & 0xFF);
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linebuffer[(j*3)+0] = (unsigned char)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]>>16) & 0xFF);
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}
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fwrite(linebuffer,1,bitmapdatalinesize,f);
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}
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free(linebuffer);
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fclose(f);
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}
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return 0;
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}
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int bmp16b_write(char * file,bitmap_data * bdata)
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{
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FILE * f;
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int i,j;
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unsigned short color;
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BITMAPFILEHEADER bitmap_header;
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BITMAPINFOHEADER bitmap_info_header;
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uint32_t bitmapdatalinesize;
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unsigned char * linebuffer;
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f = fopen(file,"wb");
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if(f)
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{
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memset(&bitmap_header,0,sizeof(BITMAPFILEHEADER));
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bitmap_header.bfType = 19778;
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bitmap_header.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
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bitmapdatalinesize = bdata->xsize*2;
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if(bitmapdatalinesize&0x3)
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bitmapdatalinesize = ((bitmapdatalinesize & (~0x3)) + 0x4);
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bitmap_header.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + (bitmapdatalinesize*bdata->ysize);
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fwrite(&bitmap_header,1,sizeof(BITMAPFILEHEADER),f);
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memset(&bitmap_info_header,0,sizeof(BITMAPINFOHEADER));
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bitmap_info_header.biSize = sizeof(BITMAPINFOHEADER);
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bitmap_info_header.biBitCount = 16;
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bitmap_info_header.biHeight = bdata->ysize;
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bitmap_info_header.biWidth = bdata->xsize;
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bitmap_info_header.biPlanes = 1;
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bitmap_info_header.biSizeImage = bitmapdatalinesize*bdata->ysize;
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fwrite(&bitmap_info_header,1,sizeof(BITMAPINFOHEADER),f);
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linebuffer = (unsigned char *)malloc(bitmapdatalinesize);
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memset(linebuffer,0,bitmapdatalinesize);
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for(i=0;i<bdata->ysize;i++)
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{
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for(j=0;j<bdata->xsize;j++)
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{
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color = (unsigned short)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]) & 0xFF)>>3;
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color = (color<<5) | (unsigned short)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]>>8) & 0xFF)>>3;
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color = (color<<5) | (unsigned short)( (bdata->data[((((bdata->ysize-1)-i))*bdata->xsize) + j]>>16) & 0xFF)>>3;
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linebuffer[(j*2)+0] = color & 0xFF;
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linebuffer[(j*2)+1] = (color>>8) & 0xFF;
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}
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fwrite(linebuffer,1,bitmapdatalinesize,f);
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}
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free(linebuffer);
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fclose(f);
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}
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return 0;
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}
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int packlineRLE(unsigned char * src,int size,unsigned char * dst)
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{
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int cnt,i,j,lastvalue;
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i = 0;
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j = 0;
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lastvalue = src[0];
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cnt = 0;
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while(i < size)
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{
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if( (src[i] == lastvalue) && (cnt<254))
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{
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cnt++;
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}
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else
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{
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dst[j++] = cnt;
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dst[j++] = lastvalue;
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lastvalue = src[i];
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cnt = 1;
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}
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i++;
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}
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if(cnt)
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{
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dst[j++] = cnt;
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dst[j++] = lastvalue;
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}
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dst[j++] = 0;
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dst[j++] = 0;
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return j;
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}
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int bmpRLE8b_write(char * file,bitmap_data * bdata)
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{
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FILE * f;
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int i,lnsize,datasize;
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BITMAPFILEHEADER bitmap_header;
|
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BITMAPINFOHEADER bitmap_info_header;
|
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uint32_t bitmapdatalinesize;
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unsigned char * linebuffer;
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unsigned char * src_data;
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unsigned char pal[256*4];
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|
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|
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f = fopen(file,"wb");
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if(f)
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{
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memset(&bitmap_header,0,sizeof(BITMAPFILEHEADER));
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bitmap_header.bfType = 19778;
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bitmap_header.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + (256*4);
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bitmapdatalinesize = bdata->xsize*1;
|
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|
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if(bitmapdatalinesize&0x3)
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bitmapdatalinesize = ((bitmapdatalinesize & (~0x3)) + 0x4);
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bitmap_header.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + sizeof(pal) + (bitmapdatalinesize*bdata->ysize);
|
||||
fwrite(&bitmap_header,1,sizeof(BITMAPFILEHEADER),f);
|
||||
|
||||
memset(&bitmap_info_header,0,sizeof(BITMAPINFOHEADER));
|
||||
bitmap_info_header.biSize = sizeof(BITMAPINFOHEADER);
|
||||
bitmap_info_header.biBitCount = 8;
|
||||
bitmap_info_header.biHeight = bdata->ysize;
|
||||
bitmap_info_header.biWidth = bdata->xsize;
|
||||
bitmap_info_header.biPlanes = 1;
|
||||
bitmap_info_header.biCompression = 1;
|
||||
bitmap_info_header.biSizeImage = bitmapdatalinesize*bdata->ysize;
|
||||
|
||||
fwrite(&bitmap_info_header,1,sizeof(BITMAPINFOHEADER),f);
|
||||
|
||||
memset(pal,0,sizeof(pal));
|
||||
if(bdata->palette)
|
||||
{
|
||||
for(i=0;i<256;i++)
|
||||
{
|
||||
pal[(i*4) + 0] = (bdata->palette[(i*4) + 2]);
|
||||
pal[(i*4) + 1] = (bdata->palette[(i*4) + 1]);
|
||||
pal[(i*4) + 2] = (bdata->palette[(i*4) + 0]);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for(i=0;i<256;i++)
|
||||
{
|
||||
pal[(i*4) + 0] = i;
|
||||
pal[(i*4) + 1] = i;
|
||||
pal[(i*4) + 2] = i;
|
||||
}
|
||||
}
|
||||
|
||||
fwrite(pal,sizeof(pal),1,f);
|
||||
|
||||
linebuffer = (unsigned char *)malloc((bitmapdatalinesize*2) + (bdata->ysize*2));
|
||||
memset(linebuffer,0,(bitmapdatalinesize*2) + (bdata->ysize*2));
|
||||
|
||||
datasize = 0;
|
||||
src_data = (unsigned char*)bdata->data;
|
||||
for(i=0;i<bdata->ysize;i++)
|
||||
{
|
||||
lnsize = packlineRLE(&src_data[((bdata->ysize-1)-i)*bdata->xsize],bdata->xsize,linebuffer);
|
||||
|
||||
if( i == (bdata->ysize - 1) )
|
||||
{
|
||||
if(lnsize)
|
||||
{
|
||||
linebuffer[lnsize-1] = 0x01; // End of BMP
|
||||
}
|
||||
}
|
||||
|
||||
fwrite(linebuffer,1,lnsize,f);
|
||||
|
||||
datasize = datasize + lnsize;
|
||||
}
|
||||
|
||||
bitmap_header.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + sizeof(pal) + datasize;
|
||||
fseek(f,0,SEEK_SET);
|
||||
fwrite(&bitmap_header,1,sizeof(BITMAPFILEHEADER),f);
|
||||
|
||||
bitmap_info_header.biSizeImage = datasize;
|
||||
fseek(f,sizeof(BITMAPFILEHEADER),SEEK_SET);
|
||||
fwrite(&bitmap_info_header,1,sizeof(BITMAPINFOHEADER),f);
|
||||
|
||||
free(linebuffer);
|
||||
fclose(f);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
#pragma pack(1)
|
||||
|
||||
typedef struct bitmap_data_
|
||||
{
|
||||
int16_t xsize;
|
||||
int16_t ysize;
|
||||
int16_t nb_color;
|
||||
uint8_t * palette;
|
||||
uint32_t * data;
|
||||
}bitmap_data;
|
||||
|
||||
typedef struct tagBITMAPFILEHEADER {
|
||||
uint16_t bfType;
|
||||
uint32_t bfSize;
|
||||
uint16_t bfReserved1;
|
||||
uint16_t bfReserved2;
|
||||
uint32_t bfOffBits;
|
||||
} BITMAPFILEHEADER;
|
||||
|
||||
typedef struct tagBITMAPINFOHEADER {
|
||||
uint32_t biSize;
|
||||
uint32_t biWidth;
|
||||
uint32_t biHeight;
|
||||
uint16_t biPlanes;
|
||||
uint16_t biBitCount;
|
||||
uint32_t biCompression;
|
||||
uint32_t biSizeImage;
|
||||
uint32_t biXPelsPerMeter;
|
||||
uint32_t biYPelsPerMeter;
|
||||
uint32_t biClrUsed;
|
||||
uint32_t biClrImportant;
|
||||
} BITMAPINFOHEADER;
|
||||
|
||||
typedef struct tagRGBQUAD {
|
||||
uint8_t rgbBlue;
|
||||
uint8_t rgbGreen;
|
||||
uint8_t rgbRed;
|
||||
uint8_t rgbReserved;
|
||||
} RGBQUAD;
|
||||
|
||||
#pragma pack()
|
||||
|
||||
int bmp_load(char * file,bitmap_data * bdata);
|
||||
int bmpRLE8b_write(char * file,bitmap_data * bdata);
|
||||
int bmp24b_write(char * file,bitmap_data * bdata);
|
||||
int bmp16b_write(char * file,bitmap_data * bdata);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue