Created
December 28, 2013 15:39
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TJS2でBitmapファイル読み込みテスト
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Plugins.link("plugin/BinaryStream.dll"); | |
const bsRead = 0; | |
const bsWrite = 1; | |
const bsAppend = 2; | |
const bsUpdate = 3; | |
const bsSeekSet = 0; | |
const bsSeekCur = 1; | |
const bsSeekEnd = 2; | |
var stream = new BinaryStream("sample.bmp",bsRead); | |
var bmpfileheader = stream.read(2+4+2+2+4); | |
var filesize = 0; | |
var offsetimage = 0; | |
if( bmpfileheader !== void ) { | |
var header = bmpfileheader.unpack("CCLSSL"); | |
if( header !== null ) { | |
if( header[0] == 0x42 && header[1] == 0x4d ) { // BM | |
filesize = header[2]; | |
Debug.message( "file size: " + filesize ); | |
offsetimage = header[5]; | |
Debug.message( "image offset: " + offsetimage ); | |
} | |
} | |
} | |
var width = 0; | |
var height = 0; | |
var bitcount = 0; | |
var imagesize = 0; | |
var bmpheader = stream.read(4+4+4+2+2+4+4+4+4+4+4); // 新しいバージョンは考えない | |
if( bmpheader !== void ) { | |
var header = bmpheader.unpack("LllSSLLLLLL"); | |
if( header !== null && header[0] == 40 ) { | |
width = header[1]; | |
Debug.message( "width: " + width ); | |
height = header[2]; | |
Debug.message( "height: " + height ); | |
var biPlanes = header[3]; | |
Debug.message( "planes: " + biPlanes ); | |
if( biPlanes != 1 ) throw new Exception("Not support format"); | |
bitcount = header[4]; | |
Debug.message( "bit count: " + bitcount ); | |
if( bitcount != 24 && bitcount != 32 ) throw new Exception("Not support format"); | |
var biCompression = header[5]; | |
Debug.message( "compression: " + biCompression ); | |
if( biCompression != 0 ) throw new Exception("Not support format"); | |
imagesize = header[6]; | |
var biXPixPerMeter = header[7]; | |
Debug.message( "xppm: " + biXPixPerMeter ); | |
var biYPixPerMeter = header[8]; | |
Debug.message( "yppm: " + biYPixPerMeter ); | |
var biClrUsed = header[9]; | |
Debug.message( "palette used: " + biClrUsed ); | |
var biClrImporant = header[10]; | |
Debug.message( "important palette: " + biClrImporant ); | |
} | |
} | |
if( width != 0 && height != 0 ) { | |
stream.seek( offsetimage, bsSeekSet ); | |
var imagedata = stream.read(filesize-offsetimage); | |
if( imagedata !== void ) { | |
var img = imagedata.unpack("C*"); | |
if( img !== null ) { | |
if( height < 0 ) height = -height; // 逆さ無視 | |
var reverse = height-1; | |
var line = (width * bitcount) / 8; | |
if ((line % 4) != 0) { | |
line = ((line \ 4) + 1) * 4; | |
} | |
var numcolorbyte = 3; | |
var bitmap = new Bitmap(width,height); | |
var index = 0; | |
if( bitcount == 32 ) { | |
numcolorbyte = 4; | |
} | |
for( var y = 0; y < height; y++ ) { | |
var offset = index; | |
for( var x = 0; x < width; x++ ) { | |
var b = img[offset+0]; | |
var g = img[offset+1]; | |
var r = img[offset+2]; | |
var color = (r << 16) | (g << 8) | b; | |
bitmap.setPixel( x, reverse-y, color ); | |
bitmap.setMaskPixel( x, reverse-y, 255 ); | |
offset+=numcolorbyte; | |
} | |
index += line; | |
} | |
bitmap.save( "sample.png", "png24" ); | |
} | |
} | |
} | |
stream.close(); |
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