laya-coreui-es
Version:
laya核心库、ui库es版本，剔除了媒体、TTF等功能。基于 LayaAir-release_2.12.0 修改
138 lines (137 loc) • 4.55 kB
JavaScript
export class AtlasGrid {
constructor(width = 0, height = 0, id = 0) {
this.atlasID = 0;
this._width = 0;
this._height = 0;
this._texCount = 0;
this._rowInfo = null;
this._cells = null;
this._used = 0;
this._cells = null;
this._rowInfo = null;
this.atlasID = id;
this._init(width, height);
}
addRect(type, width, height, pt) {
if (!this._get(width, height, pt))
return false;
this._fill(pt.x, pt.y, width, height, type);
this._texCount++;
return true;
}
_release() {
this._cells = null;
this._rowInfo = null;
}
_init(width, height) {
this._width = width;
this._height = height;
this._release();
if (this._width == 0)
return false;
this._cells = new Uint8Array(this._width * this._height * 3);
this._rowInfo = new Uint8Array(this._height);
this._used = 0;
this._clear();
return true;
}
_get(width, height, pt) {
if (width > this._width || height > this._height) {
return false;
}
var rx = -1;
var ry = -1;
var nWidth = this._width;
var nHeight = this._height;
var pCellBox = this._cells;
for (var y = 0; y < nHeight; y++) {
if (this._rowInfo[y] < width)
continue;
for (var x = 0; x < nWidth;) {
var tm = (y * nWidth + x) * 3;
if (pCellBox[tm] != 0 || pCellBox[tm + 1] < width || pCellBox[tm + 2] < height) {
x += pCellBox[tm + 1];
continue;
}
rx = x;
ry = y;
for (var xx = 0; xx < width; xx++) {
if (pCellBox[3 * xx + tm + 2] < height) {
rx = -1;
break;
}
}
if (rx < 0) {
x += pCellBox[tm + 1];
continue;
}
pt.x = rx;
pt.y = ry;
return true;
}
}
return false;
}
_fill(x, y, w, h, type) {
var nWidth = this._width;
var nHeghit = this._height;
this._check((x + w) <= nWidth && (y + h) <= nHeghit);
for (var yy = y; yy < (h + y); ++yy) {
this._check(this._rowInfo[yy] >= w);
this._rowInfo[yy] -= w;
for (var xx = 0; xx < w; xx++) {
var tm = (x + yy * nWidth + xx) * 3;
this._check(this._cells[tm] == 0);
this._cells[tm] = type;
this._cells[tm + 1] = w;
this._cells[tm + 2] = h;
}
}
if (x > 0) {
for (yy = 0; yy < h; ++yy) {
var s = 0;
for (xx = x - 1; xx >= 0; --xx, ++s) {
if (this._cells[((y + yy) * nWidth + xx) * 3] != 0)
break;
}
for (xx = s; xx > 0; --xx) {
this._cells[((y + yy) * nWidth + x - xx) * 3 + 1] = xx;
this._check(xx > 0);
}
}
}
if (y > 0) {
for (xx = x; xx < (x + w); ++xx) {
s = 0;
for (yy = y - 1; yy >= 0; --yy, s++) {
if (this._cells[(xx + yy * nWidth) * 3] != 0)
break;
}
for (yy = s; yy > 0; --yy) {
this._cells[(xx + (y - yy) * nWidth) * 3 + 2] = yy;
this._check(yy > 0);
}
}
}
this._used += (w * h) / (this._width * this._height);
}
_check(ret) {
if (ret == false) {
console.log("xtexMerger 错误啦");
}
}
_clear() {
this._texCount = 0;
for (var y = 0; y < this._height; y++) {
this._rowInfo[y] = this._width;
}
for (var i = 0; i < this._height; i++) {
for (var j = 0; j < this._width; j++) {
var tm = (i * this._width + j) * 3;
this._cells[tm] = 0;
this._cells[tm + 1] = this._width - j;
this._cells[tm + 2] = this._width - i;
}
}
}
}