playcanvas
Version:
PlayCanvas WebGL game engine
155 lines (152 loc) • 6.56 kB
JavaScript
import { Debug } from '../../../core/debug.js';
import { PIXELFORMAT_RGB8, ADDRESS_CLAMP_TO_EDGE, ADDRESS_REPEAT, TEXHINT_ASSET, PIXELFORMAT_DXT1, PIXELFORMAT_DXT5, PIXELFORMAT_RGBA16F, PIXELFORMAT_RGBA32F, PIXELFORMAT_ETC1, PIXELFORMAT_PVRTC_2BPP_RGB_1, PIXELFORMAT_PVRTC_2BPP_RGBA_1, PIXELFORMAT_PVRTC_4BPP_RGB_1, PIXELFORMAT_PVRTC_4BPP_RGBA_1, PIXELFORMAT_RGBA8 } from '../../../platform/graphics/constants.js';
import { Texture } from '../../../platform/graphics/texture.js';
import { Asset } from '../../asset/asset.js';
import { TextureParser } from './texture.js';
function _extends() {
_extends = Object.assign || function(target) {
for(var i = 1; i < arguments.length; i++){
var source = arguments[i];
for(var key in source){
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
return _extends.apply(this, arguments);
}
/**
* Legacy texture parser for dds files.
*/ class DdsParser extends TextureParser {
load(url, callback, asset) {
Asset.fetchArrayBuffer(url.load, callback, asset, this.maxRetries);
}
open(url, data, device, textureOptions) {
if (textureOptions === void 0) textureOptions = {};
var header = new Uint32Array(data, 0, 128 / 4);
var width = header[4];
var height = header[3];
var mips = Math.max(header[7], 1);
var isFourCc = header[20] === 4;
var fcc = header[21];
var bpp = header[22];
var isCubemap = header[28] === 65024; // TODO: check by bitflag
var FCC_DXT1 = 827611204; // DXT1
var FCC_DXT5 = 894720068; // DXT5
var FCC_FP16 = 113; // RGBA16f
var FCC_FP32 = 116; // RGBA32f
// non standard
var FCC_ETC1 = 826496069;
var FCC_PVRTC_2BPP_RGB_1 = 825438800;
var FCC_PVRTC_2BPP_RGBA_1 = 825504336;
var FCC_PVRTC_4BPP_RGB_1 = 825439312;
var FCC_PVRTC_4BPP_RGBA_1 = 825504848;
var compressed = false;
var etc1 = false;
var pvrtc2 = false;
var pvrtc4 = false;
var format = null;
var componentSize = 1;
var texture;
if (isFourCc) {
if (fcc === FCC_DXT1) {
format = PIXELFORMAT_DXT1;
compressed = true;
} else if (fcc === FCC_DXT5) {
format = PIXELFORMAT_DXT5;
compressed = true;
} else if (fcc === FCC_FP16) {
format = PIXELFORMAT_RGBA16F;
componentSize = 2;
} else if (fcc === FCC_FP32) {
format = PIXELFORMAT_RGBA32F;
componentSize = 4;
} else if (fcc === FCC_ETC1) {
format = PIXELFORMAT_ETC1;
compressed = true;
etc1 = true;
} else if (fcc === FCC_PVRTC_2BPP_RGB_1 || fcc === FCC_PVRTC_2BPP_RGBA_1) {
format = fcc === FCC_PVRTC_2BPP_RGB_1 ? PIXELFORMAT_PVRTC_2BPP_RGB_1 : PIXELFORMAT_PVRTC_2BPP_RGBA_1;
compressed = true;
pvrtc2 = true;
} else if (fcc === FCC_PVRTC_4BPP_RGB_1 || fcc === FCC_PVRTC_4BPP_RGBA_1) {
format = fcc === FCC_PVRTC_4BPP_RGB_1 ? PIXELFORMAT_PVRTC_4BPP_RGB_1 : PIXELFORMAT_PVRTC_4BPP_RGBA_1;
compressed = true;
pvrtc4 = true;
}
} else {
if (bpp === 32) {
format = PIXELFORMAT_RGBA8;
}
}
if (!format) {
Debug.error("This DDS pixel format is currently unsupported. Empty texture will be created instead of " + url + ".");
texture = new Texture(device, {
width: 4,
height: 4,
format: PIXELFORMAT_RGB8,
name: 'dds-legacy-empty'
});
return texture;
}
texture = new Texture(device, _extends({
name: url,
profilerHint: TEXHINT_ASSET,
addressU: isCubemap ? ADDRESS_CLAMP_TO_EDGE : ADDRESS_REPEAT,
addressV: isCubemap ? ADDRESS_CLAMP_TO_EDGE : ADDRESS_REPEAT,
width: width,
height: height,
format: format,
cubemap: isCubemap,
mipmaps: mips > 1
}, textureOptions));
var offset = 128;
var faces = isCubemap ? 6 : 1;
var mipSize;
var DXT_BLOCK_WIDTH = 4;
var DXT_BLOCK_HEIGHT = 4;
var blockSize = fcc === FCC_DXT1 ? 8 : 16;
var numBlocksAcross, numBlocksDown, numBlocks;
for(var face = 0; face < faces; face++){
var mipWidth = width;
var mipHeight = height;
for(var i = 0; i < mips; i++){
if (compressed) {
if (etc1) {
mipSize = Math.floor((mipWidth + 3) / 4) * Math.floor((mipHeight + 3) / 4) * 8;
} else if (pvrtc2) {
mipSize = Math.max(mipWidth, 16) * Math.max(mipHeight, 8) / 4;
} else if (pvrtc4) {
mipSize = Math.max(mipWidth, 8) * Math.max(mipHeight, 8) / 2;
} else {
numBlocksAcross = Math.floor((mipWidth + DXT_BLOCK_WIDTH - 1) / DXT_BLOCK_WIDTH);
numBlocksDown = Math.floor((mipHeight + DXT_BLOCK_HEIGHT - 1) / DXT_BLOCK_HEIGHT);
numBlocks = numBlocksAcross * numBlocksDown;
mipSize = numBlocks * blockSize;
}
} else {
mipSize = mipWidth * mipHeight * 4;
}
var mipBuff = format === PIXELFORMAT_RGBA32F ? new Float32Array(data, offset, mipSize) : format === PIXELFORMAT_RGBA16F ? new Uint16Array(data, offset, mipSize) : new Uint8Array(data, offset, mipSize);
if (!isCubemap) {
texture._levels[i] = mipBuff;
} else {
if (!texture._levels[i]) texture._levels[i] = [];
texture._levels[i][face] = mipBuff;
}
offset += mipSize * componentSize;
mipWidth = Math.max(mipWidth * 0.5, 1);
mipHeight = Math.max(mipHeight * 0.5, 1);
}
}
texture.upload();
return texture;
}
constructor(registry){
super();
this.maxRetries = 0;
}
}
export { DdsParser };