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1×
1×
1×
524288×
468143×
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524288×
524288×
1×
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1×
1×
1×
1×
| import Texture from '../Texture';
import Texture2D from '../Texture2D';
var toChar = String.fromCharCode;
var MINELEN = 8;
var MAXELEN = 0x7fff;
function rgbe2float(rgbe, buffer, offset, exposure) {
if (rgbe[3] > 0) {
var f = Math.pow(2.0, rgbe[3] - 128 - 8 + exposure);
buffer[offset + 0] = rgbe[0] * f;
buffer[offset + 1] = rgbe[1] * f;
buffer[offset + 2] = rgbe[2] * f;
}
else {
buffer[offset + 0] = 0;
buffer[offset + 1] = 0;
buffer[offset + 2] = 0;
}
buffer[offset + 3] = 1.0;
return buffer;
}
function uint82string(array, offset, size) {
var str = '';
for (var i = offset; i < size; i++) {
str += toChar(array[i]);
}
return str;
}
function copyrgbe(s, t) {
t[0] = s[0];
t[1] = s[1];
t[2] = s[2];
t[3] = s[3];
}
// TODO : check
function oldReadColors(scan, buffer, offset, xmax) {
var rshift = 0, x = 0, len = xmax;
while (len > 0) {
scan[x][0] = buffer[offset++];
scan[x][1] = buffer[offset++];
scan[x][2] = buffer[offset++];
scan[x][3] = buffer[offset++];
if (scan[x][0] === 1 && scan[x][1] === 1 && scan[x][2] === 1) {
// exp is count of repeated pixels
for (var i = (scan[x][3] << rshift) >>> 0; i > 0; i--) {
copyrgbe(scan[x-1], scan[x]);
x++;
len--;
}
rshift += 8;
} else {
x++;
len--;
rshift = 0;
}
}
return offset;
}
function readColors(scan, buffer, offset, xmax) {
Iif ((xmax < MINELEN) | (xmax > MAXELEN)) {
return oldReadColors(scan, buffer, offset, xmax);
}
var i = buffer[offset++];
Iif (i != 2) {
return oldReadColors(scan, buffer, offset - 1, xmax);
}
scan[0][1] = buffer[offset++];
scan[0][2] = buffer[offset++];
i = buffer[offset++];
Iif ((((scan[0][2] << 8) >>> 0) | i) >>> 0 !== xmax) {
return null;
}
for (var i = 0; i < 4; i++) {
for (var x = 0; x < xmax;) {
var code = buffer[offset++];
if (code > 128) {
code = (code & 127) >>> 0;
var val = buffer[offset++];
while (code--) {
scan[x++][i] = val;
}
} else {
while (code--) {
scan[x++][i] = buffer[offset++];
}
}
}
}
return offset;
}
var ret = {
// http://www.graphics.cornell.edu/~bjw/rgbe.html
// Blender source
// http://radsite.lbl.gov/radiance/refer/Notes/picture_format.html
parseRGBE: function(arrayBuffer, texture, exposure) {
Iif (exposure == null) {
exposure = 0;
}
var data = new Uint8Array(arrayBuffer);
var size = data.length;
Iif (uint82string(data, 0, 2) !== '#?') {
return;
}
// find empty line, next line is resolution info
for (var i = 2; i < size; i++) {
if (toChar(data[i]) === '\n' && toChar(data[i+1]) === '\n') {
break;
}
}
Iif (i >= size) { // not found
return;
}
// find resolution info line
i += 2;
var str = '';
for (; i < size; i++) {
var _char = toChar(data[i]);
if (_char === '\n') {
break;
}
str += _char;
}
// -Y M +X N
var tmp = str.split(' ');
var height = parseInt(tmp[1]);
var width = parseInt(tmp[3]);
Iif (!width || !height) {
return;
}
// read and decode actual data
var offset = i+1;
var scanline = [];
// memzero
for (var x = 0; x < width; x++) {
scanline[x] = [];
for (var j = 0; j < 4; j++) {
scanline[x][j] = 0;
}
}
var pixels = new Float32Array(width * height * 4);
var offset2 = 0;
for (var y = 0; y < height; y++) {
var offset = readColors(scanline, data, offset, width);
Iif (!offset) {
return null;
}
for (var x = 0; x < width; x++) {
rgbe2float(scanline[x], pixels, offset2, exposure);
offset2 += 4;
}
}
Iif (!texture) {
texture = new Texture2D();
}
texture.width = width;
texture.height = height;
texture.pixels = pixels;
// HALF_FLOAT can't use Float32Array
texture.type = Texture.FLOAT;
return texture;
},
parseRGBEFromPNG: function(png) {
}
};
export default ret;
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