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/*-------------------------------------------------------------------------
* drawElements Quality Program OpenGL ES Utilities
* ------------------------------------------------
*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
'use strict';
goog.provide('framework.common.tcuPixelFormat');
goog.scope(function() {
var tcuPixelFormat = framework.common.tcuPixelFormat;
/**
* @constructor
* @param {number=} r
* @param {number=} g
* @param {number=} b
* @param {number=} a
*/
tcuPixelFormat.PixelFormat = function(r, g, b, a) {
this.redBits = r || 0;
this.greenBits = g || 0;
this.blueBits = b || 0;
this.alphaBits = a || 0;
};
/**
* @param {WebGL2RenderingContext} context
* @return {tcuPixelFormat.PixelFormat}
*/
tcuPixelFormat.PixelFormatFromContext = function(context) {
var r = /** @type {number} */ (context.getParameter(gl.RED_BITS));
var g = /** @type {number} */ (context.getParameter(gl.GREEN_BITS));
var b = /** @type {number} */ (context.getParameter(gl.BLUE_BITS));
var a = /** @type {number} */ (context.getParameter(gl.ALPHA_BITS));
return new tcuPixelFormat.PixelFormat(r, g, b, a);
};
/**
* @param {number} r
* @param {number} g
* @param {number} b
* @param {number} a
* @return {boolean}
*/
tcuPixelFormat.PixelFormat.prototype.equals = function(r, g, b, a) {
return this.redBits === r &&
this.greenBits === g &&
this.blueBits === b &&
this.alphaBits === a;
};
/**
* @return {Array<number>}
*/
tcuPixelFormat.PixelFormat.prototype.getColorThreshold = function() {
return [1 << (8 - this.redBits),
1 << (8 - this.greenBits),
1 << (8 - this.blueBits),
(this.alphaBits > 0) ? (1 << (8 - this.alphaBits)) : 0];
};
});
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