You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
548 lines
12 KiB
548 lines
12 KiB
/*
|
|
* @author Daosheng Mu / https://github.com/DaoshengMu/
|
|
* @author mrdoob / http://mrdoob.com/
|
|
* @author takahirox / https://github.com/takahirox/
|
|
*/
|
|
|
|
THREE.TGALoader = function ( manager ) {
|
|
|
|
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
|
|
|
|
};
|
|
|
|
THREE.TGALoader.prototype = {
|
|
|
|
constructor: THREE.TGALoader,
|
|
|
|
load: function ( url, onLoad, onProgress, onError ) {
|
|
|
|
var scope = this;
|
|
|
|
var texture = new THREE.Texture();
|
|
|
|
var loader = new THREE.FileLoader( this.manager );
|
|
loader.setResponseType( 'arraybuffer' );
|
|
loader.setPath( this.path );
|
|
|
|
loader.load( url, function ( buffer ) {
|
|
|
|
texture.image = scope.parse( buffer );
|
|
texture.needsUpdate = true;
|
|
|
|
if ( onLoad !== undefined ) {
|
|
|
|
onLoad( texture );
|
|
|
|
}
|
|
|
|
}, onProgress, onError );
|
|
|
|
return texture;
|
|
|
|
},
|
|
|
|
parse: function ( buffer ) {
|
|
|
|
// reference from vthibault, https://github.com/vthibault/roBrowser/blob/master/src/Loaders/Targa.js
|
|
|
|
function tgaCheckHeader( header ) {
|
|
|
|
switch ( header.image_type ) {
|
|
|
|
// check indexed type
|
|
|
|
case TGA_TYPE_INDEXED:
|
|
case TGA_TYPE_RLE_INDEXED:
|
|
if ( header.colormap_length > 256 || header.colormap_size !== 24 || header.colormap_type !== 1 ) {
|
|
|
|
console.error( 'THREE.TGALoader: Invalid type colormap data for indexed type.' );
|
|
|
|
}
|
|
break;
|
|
|
|
// check colormap type
|
|
|
|
case TGA_TYPE_RGB:
|
|
case TGA_TYPE_GREY:
|
|
case TGA_TYPE_RLE_RGB:
|
|
case TGA_TYPE_RLE_GREY:
|
|
if ( header.colormap_type ) {
|
|
|
|
console.error( 'THREE.TGALoader: Invalid type colormap data for colormap type.' );
|
|
|
|
}
|
|
break;
|
|
|
|
// What the need of a file without data ?
|
|
|
|
case TGA_TYPE_NO_DATA:
|
|
console.error( 'THREE.TGALoader: No data.' );
|
|
|
|
// Invalid type ?
|
|
|
|
default:
|
|
console.error( 'THREE.TGALoader: Invalid type "%s".', header.image_type );
|
|
|
|
}
|
|
|
|
// check image width and height
|
|
|
|
if ( header.width <= 0 || header.height <= 0 ) {
|
|
|
|
console.error( 'THREE.TGALoader: Invalid image size.' );
|
|
|
|
}
|
|
|
|
// check image pixel size
|
|
|
|
if ( header.pixel_size !== 8 && header.pixel_size !== 16 &&
|
|
header.pixel_size !== 24 && header.pixel_size !== 32 ) {
|
|
|
|
console.error( 'THREE.TGALoader: Invalid pixel size "%s".', header.pixel_size );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// parse tga image buffer
|
|
|
|
function tgaParse( use_rle, use_pal, header, offset, data ) {
|
|
|
|
var pixel_data,
|
|
pixel_size,
|
|
pixel_total,
|
|
palettes;
|
|
|
|
pixel_size = header.pixel_size >> 3;
|
|
pixel_total = header.width * header.height * pixel_size;
|
|
|
|
// read palettes
|
|
|
|
if ( use_pal ) {
|
|
|
|
palettes = data.subarray( offset, offset += header.colormap_length * ( header.colormap_size >> 3 ) );
|
|
|
|
}
|
|
|
|
// read RLE
|
|
|
|
if ( use_rle ) {
|
|
|
|
pixel_data = new Uint8Array( pixel_total );
|
|
|
|
var c, count, i;
|
|
var shift = 0;
|
|
var pixels = new Uint8Array( pixel_size );
|
|
|
|
while ( shift < pixel_total ) {
|
|
|
|
c = data[ offset ++ ];
|
|
count = ( c & 0x7f ) + 1;
|
|
|
|
// RLE pixels
|
|
|
|
if ( c & 0x80 ) {
|
|
|
|
// bind pixel tmp array
|
|
|
|
for ( i = 0; i < pixel_size; ++ i ) {
|
|
|
|
pixels[ i ] = data[ offset ++ ];
|
|
|
|
}
|
|
|
|
// copy pixel array
|
|
|
|
for ( i = 0; i < count; ++ i ) {
|
|
|
|
pixel_data.set( pixels, shift + i * pixel_size );
|
|
|
|
}
|
|
|
|
shift += pixel_size * count;
|
|
|
|
} else {
|
|
|
|
// raw pixels
|
|
|
|
count *= pixel_size;
|
|
for ( i = 0; i < count; ++ i ) {
|
|
|
|
pixel_data[ shift + i ] = data[ offset ++ ];
|
|
|
|
}
|
|
shift += count;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// raw pixels
|
|
|
|
pixel_data = data.subarray(
|
|
offset, offset += ( use_pal ? header.width * header.height : pixel_total )
|
|
);
|
|
|
|
}
|
|
|
|
return {
|
|
pixel_data: pixel_data,
|
|
palettes: palettes
|
|
};
|
|
|
|
}
|
|
|
|
function tgaGetImageData8bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image, palettes ) {
|
|
|
|
var colormap = palettes;
|
|
var color, i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i ++ ) {
|
|
|
|
color = image[ i ];
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = 255;
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = colormap[ ( color * 3 ) + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = colormap[ ( color * 3 ) + 1 ];
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = colormap[ ( color * 3 ) + 2 ];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function tgaGetImageData16bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image ) {
|
|
|
|
var color, i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i += 2 ) {
|
|
|
|
color = image[ i + 0 ] + ( image[ i + 1 ] << 8 ); // Inversed ?
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = ( color & 0x7C00 ) >> 7;
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = ( color & 0x03E0 ) >> 2;
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = ( color & 0x001F ) >> 3;
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = ( color & 0x8000 ) ? 0 : 255;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function tgaGetImageData24bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image ) {
|
|
|
|
var i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i += 3 ) {
|
|
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = 255;
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = image[ i + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = image[ i + 1 ];
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = image[ i + 2 ];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function tgaGetImageData32bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image ) {
|
|
|
|
var i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i += 4 ) {
|
|
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = image[ i + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = image[ i + 1 ];
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = image[ i + 2 ];
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = image[ i + 3 ];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function tgaGetImageDataGrey8bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image ) {
|
|
|
|
var color, i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i ++ ) {
|
|
|
|
color = image[ i ];
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = color;
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = color;
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = color;
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = 255;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function tgaGetImageDataGrey16bits( imageData, y_start, y_step, y_end, x_start, x_step, x_end, image ) {
|
|
|
|
var i = 0, x, y;
|
|
var width = header.width;
|
|
|
|
for ( y = y_start; y !== y_end; y += y_step ) {
|
|
|
|
for ( x = x_start; x !== x_end; x += x_step, i += 2 ) {
|
|
|
|
imageData[ ( x + width * y ) * 4 + 0 ] = image[ i + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 1 ] = image[ i + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 2 ] = image[ i + 0 ];
|
|
imageData[ ( x + width * y ) * 4 + 3 ] = image[ i + 1 ];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return imageData;
|
|
|
|
}
|
|
|
|
function getTgaRGBA( data, width, height, image, palette ) {
|
|
|
|
var x_start,
|
|
y_start,
|
|
x_step,
|
|
y_step,
|
|
x_end,
|
|
y_end;
|
|
|
|
switch ( ( header.flags & TGA_ORIGIN_MASK ) >> TGA_ORIGIN_SHIFT ) {
|
|
|
|
default:
|
|
case TGA_ORIGIN_UL:
|
|
x_start = 0;
|
|
x_step = 1;
|
|
x_end = width;
|
|
y_start = 0;
|
|
y_step = 1;
|
|
y_end = height;
|
|
break;
|
|
|
|
case TGA_ORIGIN_BL:
|
|
x_start = 0;
|
|
x_step = 1;
|
|
x_end = width;
|
|
y_start = height - 1;
|
|
y_step = - 1;
|
|
y_end = - 1;
|
|
break;
|
|
|
|
case TGA_ORIGIN_UR:
|
|
x_start = width - 1;
|
|
x_step = - 1;
|
|
x_end = - 1;
|
|
y_start = 0;
|
|
y_step = 1;
|
|
y_end = height;
|
|
break;
|
|
|
|
case TGA_ORIGIN_BR:
|
|
x_start = width - 1;
|
|
x_step = - 1;
|
|
x_end = - 1;
|
|
y_start = height - 1;
|
|
y_step = - 1;
|
|
y_end = - 1;
|
|
break;
|
|
|
|
}
|
|
|
|
if ( use_grey ) {
|
|
|
|
switch ( header.pixel_size ) {
|
|
|
|
case 8:
|
|
tgaGetImageDataGrey8bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image );
|
|
break;
|
|
|
|
case 16:
|
|
tgaGetImageDataGrey16bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image );
|
|
break;
|
|
|
|
default:
|
|
console.error( 'THREE.TGALoader: Format not supported.' );
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
switch ( header.pixel_size ) {
|
|
|
|
case 8:
|
|
tgaGetImageData8bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image, palette );
|
|
break;
|
|
|
|
case 16:
|
|
tgaGetImageData16bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image );
|
|
break;
|
|
|
|
case 24:
|
|
tgaGetImageData24bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image );
|
|
break;
|
|
|
|
case 32:
|
|
tgaGetImageData32bits( data, y_start, y_step, y_end, x_start, x_step, x_end, image );
|
|
break;
|
|
|
|
default:
|
|
console.error( 'THREE.TGALoader: Format not supported.' );
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Load image data according to specific method
|
|
// var func = 'tgaGetImageData' + (use_grey ? 'Grey' : '') + (header.pixel_size) + 'bits';
|
|
// func(data, y_start, y_step, y_end, x_start, x_step, x_end, width, image, palette );
|
|
return data;
|
|
|
|
}
|
|
|
|
// TGA constants
|
|
|
|
var TGA_TYPE_NO_DATA = 0,
|
|
TGA_TYPE_INDEXED = 1,
|
|
TGA_TYPE_RGB = 2,
|
|
TGA_TYPE_GREY = 3,
|
|
TGA_TYPE_RLE_INDEXED = 9,
|
|
TGA_TYPE_RLE_RGB = 10,
|
|
TGA_TYPE_RLE_GREY = 11,
|
|
|
|
TGA_ORIGIN_MASK = 0x30,
|
|
TGA_ORIGIN_SHIFT = 0x04,
|
|
TGA_ORIGIN_BL = 0x00,
|
|
TGA_ORIGIN_BR = 0x01,
|
|
TGA_ORIGIN_UL = 0x02,
|
|
TGA_ORIGIN_UR = 0x03;
|
|
|
|
if ( buffer.length < 19 ) console.error( 'THREE.TGALoader: Not enough data to contain header.' );
|
|
|
|
var content = new Uint8Array( buffer ),
|
|
offset = 0,
|
|
header = {
|
|
id_length: content[ offset ++ ],
|
|
colormap_type: content[ offset ++ ],
|
|
image_type: content[ offset ++ ],
|
|
colormap_index: content[ offset ++ ] | content[ offset ++ ] << 8,
|
|
colormap_length: content[ offset ++ ] | content[ offset ++ ] << 8,
|
|
colormap_size: content[ offset ++ ],
|
|
origin: [
|
|
content[ offset ++ ] | content[ offset ++ ] << 8,
|
|
content[ offset ++ ] | content[ offset ++ ] << 8
|
|
],
|
|
width: content[ offset ++ ] | content[ offset ++ ] << 8,
|
|
height: content[ offset ++ ] | content[ offset ++ ] << 8,
|
|
pixel_size: content[ offset ++ ],
|
|
flags: content[ offset ++ ]
|
|
};
|
|
|
|
// check tga if it is valid format
|
|
|
|
tgaCheckHeader( header );
|
|
|
|
if ( header.id_length + offset > buffer.length ) {
|
|
|
|
console.error( 'THREE.TGALoader: No data.' );
|
|
|
|
}
|
|
|
|
// skip the needn't data
|
|
|
|
offset += header.id_length;
|
|
|
|
// get targa information about RLE compression and palette
|
|
|
|
var use_rle = false,
|
|
use_pal = false,
|
|
use_grey = false;
|
|
|
|
switch ( header.image_type ) {
|
|
|
|
case TGA_TYPE_RLE_INDEXED:
|
|
use_rle = true;
|
|
use_pal = true;
|
|
break;
|
|
|
|
case TGA_TYPE_INDEXED:
|
|
use_pal = true;
|
|
break;
|
|
|
|
case TGA_TYPE_RLE_RGB:
|
|
use_rle = true;
|
|
break;
|
|
|
|
case TGA_TYPE_RGB:
|
|
break;
|
|
|
|
case TGA_TYPE_RLE_GREY:
|
|
use_rle = true;
|
|
use_grey = true;
|
|
break;
|
|
|
|
case TGA_TYPE_GREY:
|
|
use_grey = true;
|
|
break;
|
|
|
|
}
|
|
|
|
//
|
|
|
|
var canvas = document.createElement( 'canvas' );
|
|
canvas.width = header.width;
|
|
canvas.height = header.height;
|
|
|
|
var context = canvas.getContext( '2d' );
|
|
var imageData = context.createImageData( header.width, header.height );
|
|
|
|
var result = tgaParse( use_rle, use_pal, header, offset, content );
|
|
var rgbaData = getTgaRGBA( imageData.data, header.width, header.height, result.pixel_data, result.palettes );
|
|
|
|
context.putImageData( imageData, 0, 0 );
|
|
|
|
return canvas;
|
|
|
|
},
|
|
|
|
setPath: function ( value ) {
|
|
|
|
this.path = value;
|
|
return this;
|
|
|
|
}
|
|
|
|
};
|
|
|