vislite/lib/Texture/index.es.js

灵活、快速、简单的数据可视化交互式跨端前端库

var initTexture = function (painter, type, unit) {
    var texture = painter.createTexture();
    painter.activeTexture(painter['TEXTURE' + unit]);
    painter.bindTexture(type, texture);
    return texture;
};
var linkImage = function (painter, type, level, format, textureType, image) {
    painter.texImage2D(type, level, format, format, textureType, image);
};
var linkCube = function (painter, type, level, format, textureType, images, width, height, texture) {
    var types = [
        painter.TEXTURE_CUBE_MAP_POSITIVE_X,
        painter.TEXTURE_CUBE_MAP_NEGATIVE_X,
        painter.TEXTURE_CUBE_MAP_POSITIVE_Y,
        painter.TEXTURE_CUBE_MAP_NEGATIVE_Y,
        painter.TEXTURE_CUBE_MAP_POSITIVE_Z,
        painter.TEXTURE_CUBE_MAP_NEGATIVE_Z
    ];
    var target;
    for (var i = 0; i < types.length; i++) {
        if (images[i]) {
            target = types[i];
            painter.texImage2D(target, level, format, width, height, 0, format, textureType, null);
            painter.bindTexture(type, texture);
            painter.texImage2D(target, level, format, format, textureType, images[i]);
        }
    }
    painter.generateMipmap(type);
};
var TextureObject = (function () {
    function TextureObject(painter, type, unit) {
        if (unit === void 0) { unit = 0; }
        this.__painter = painter;
        this.__type = {
            "2d": painter.TEXTURE_2D,
            "cube": painter.TEXTURE_CUBE_MAP
        }[type];
        this.__texture = initTexture(painter, this.__type, unit);
        painter.texParameteri(this.__type, painter.TEXTURE_MIN_FILTER, painter.NEAREST);
        painter.texParameteri(this.__type, painter.TEXTURE_MAG_FILTER, painter.NEAREST);
        painter.texParameteri(this.__type, painter.TEXTURE_WRAP_S, painter.CLAMP_TO_EDGE);
        painter.texParameteri(this.__type, painter.TEXTURE_WRAP_T, painter.CLAMP_TO_EDGE);
    }
    TextureObject.prototype.useImage = function (image) {
        linkImage(this.__painter, this.__type, 0, this.__painter.RGBA, this.__painter.UNSIGNED_BYTE, image);
        return this;
    };
    TextureObject.prototype.useCube = function (images, width, height) {
        linkCube(this.__painter, this.__type, 0, this.__painter.RGBA, this.__painter.UNSIGNED_BYTE, images, width, height, this.__texture);
        return this;
    };
    return TextureObject;
}());

export { TextureObject as default };