mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-05 14:13:24 +01:00
432 lines
10 KiB
JavaScript
Executable File
432 lines
10 KiB
JavaScript
Executable File
/*
|
|
* @author Daosheng Mu / https://github.com/DaoshengMu/
|
|
* @author mrdoob / http://mrdoob.com/
|
|
*/
|
|
|
|
THREE.TGALoader = function ( manager ) {
|
|
|
|
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
|
|
|
|
};
|
|
|
|
// extend THREE.BinaryTextureLoader
|
|
THREE.TGALoader.prototype = Object.create( THREE.BinaryTextureLoader.prototype );
|
|
|
|
// reference from vthibault, https://github.com/vthibault/roBrowser/blob/master/src/Loaders/Targa.js
|
|
THREE.TGALoader.prototype._parser = function ( buffer ) {
|
|
|
|
// 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.parse: 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 ++ ]
|
|
};
|
|
|
|
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.parse.tgaCheckHeader: 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.parse.tgaCheckHeader: 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.parse.tgaCheckHeader: No data');
|
|
|
|
// Invalid type ?
|
|
default:
|
|
console.error('THREE.TGALoader.parse.tgaCheckHeader: Invalid type " ' + header.image_type + '"');
|
|
|
|
}
|
|
|
|
// Check image width and height
|
|
if ( header.width <= 0 || header.height <= 0 ) {
|
|
console.error( 'THREE.TGALoader.parse.tgaCheckHeader: 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.parse.tgaCheckHeader: Invalid pixel size "' + header.pixel_size + '"');
|
|
}
|
|
|
|
}
|
|
|
|
// Check tga if it is valid format
|
|
tgaCheckHeader( header );
|
|
|
|
if ( header.id_length + offset > buffer.length ) {
|
|
console.error('THREE.TGALoader.parse: 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;
|
|
|
|
}
|
|
|
|
// 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( width, height, image, palette ) {
|
|
|
|
var x_start,
|
|
y_start,
|
|
x_step,
|
|
y_step,
|
|
x_end,
|
|
y_end,
|
|
data = new Uint8Array(width * height * 4);
|
|
|
|
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.parse.getTgaRGBA: not support this format' );
|
|
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.parse.getTgaRGBA: not support this format' );
|
|
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;
|
|
|
|
}
|
|
|
|
var result = tgaParse( use_rle, use_pal, header, offset, content );
|
|
var rgbaData = getTgaRGBA( header.width, header.height, result.pixel_data, result.palettes );
|
|
|
|
return {
|
|
width: header.width,
|
|
height: header.height,
|
|
data: rgbaData
|
|
};
|
|
|
|
};
|