293 lines
3.6 KiB
JavaScript
293 lines
3.6 KiB
JavaScript
goog.provide('ol.webgl');
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if (ol.ENABLE_WEBGL) {
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/** Constants taken from goog.webgl
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*/
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.ONE = 1;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.SRC_ALPHA = 0x0302;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.COLOR_ATTACHMENT0 = 0x8CE0;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.COLOR_BUFFER_BIT = 0x00004000;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TRIANGLES = 0x0004;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TRIANGLE_STRIP = 0x0005;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.ONE_MINUS_SRC_ALPHA = 0x0303;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.ARRAY_BUFFER = 0x8892;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.ELEMENT_ARRAY_BUFFER = 0x8893;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.STREAM_DRAW = 0x88E0;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.STATIC_DRAW = 0x88E4;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.DYNAMIC_DRAW = 0x88E8;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.CULL_FACE = 0x0B44;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.BLEND = 0x0BE2;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.STENCIL_TEST = 0x0B90;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.DEPTH_TEST = 0x0B71;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.SCISSOR_TEST = 0x0C11;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.UNSIGNED_BYTE = 0x1401;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.UNSIGNED_SHORT = 0x1403;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.UNSIGNED_INT = 0x1405;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.FLOAT = 0x1406;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.RGBA = 0x1908;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.FRAGMENT_SHADER = 0x8B30;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.VERTEX_SHADER = 0x8B31;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.LINK_STATUS = 0x8B82;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.LINEAR = 0x2601;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE_MAG_FILTER = 0x2800;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE_MIN_FILTER = 0x2801;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE_WRAP_S = 0x2802;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE_WRAP_T = 0x2803;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE_2D = 0x0DE1;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.TEXTURE0 = 0x84C0;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.CLAMP_TO_EDGE = 0x812F;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.COMPILE_STATUS = 0x8B81;
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/**
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* @const
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* @type {number}
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*/
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ol.webgl.FRAMEBUFFER = 0x8D40;
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/** end of goog.webgl constants
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*/
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/**
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* @const
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* @private
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* @type {Array.<string>}
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*/
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ol.webgl.CONTEXT_IDS_ = [
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'experimental-webgl',
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'webgl',
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'webkit-3d',
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'moz-webgl'
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];
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/**
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* @param {HTMLCanvasElement} canvas Canvas.
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* @param {Object=} opt_attributes Attributes.
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* @return {WebGLRenderingContext} WebGL rendering context.
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*/
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ol.webgl.getContext = function(canvas, opt_attributes) {
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var context, i, ii = ol.webgl.CONTEXT_IDS_.length;
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for (i = 0; i < ii; ++i) {
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try {
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context = canvas.getContext(ol.webgl.CONTEXT_IDS_[i], opt_attributes);
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if (context) {
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return /** @type {!WebGLRenderingContext} */ (context);
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}
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} catch (e) {
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// pass
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}
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}
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return null;
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};
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}
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