mirror of
https://github.com/tiennm99/fbird.git
synced 2026-08-08 02:24:36 +00:00
208 lines
7.8 KiB
JavaScript
Vendored
208 lines
7.8 KiB
JavaScript
Vendored
/****************************************************************************
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Copyright (c) 2013-2014 Chukong Technologies Inc.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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function setProgram (node, program) {
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node.shaderProgram = program;
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var children = node.children;
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if (!children)
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return;
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for (var i = 0; i < children.length; i++)
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setProgram(children[i], program);
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}
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// ------------------------------- ClippingNode's WebGL render cmd ------------------------------
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(function () {
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cc.ClippingNode.WebGLRenderCmd = function (renderable) {
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this._rootCtor(renderable);
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this._needDraw = false;
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this._beforeVisitCmd = new cc.CustomRenderCmd(this, this._onBeforeVisit);
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this._afterDrawStencilCmd = new cc.CustomRenderCmd(this, this._onAfterDrawStencil);
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this._afterVisitCmd = new cc.CustomRenderCmd(this, this._onAfterVisit);
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this._currentStencilEnabled = null;
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this._mask_layer_le = null;
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};
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var proto = cc.ClippingNode.WebGLRenderCmd.prototype = Object.create(cc.Node.WebGLRenderCmd.prototype);
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proto.constructor = cc.ClippingNode.WebGLRenderCmd;
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cc.ClippingNode.WebGLRenderCmd._init_once = null;
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cc.ClippingNode.WebGLRenderCmd._visit_once = null;
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cc.ClippingNode.WebGLRenderCmd._layer = -1;
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proto.initStencilBits = function () {
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// get (only once) the number of bits of the stencil buffer
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cc.ClippingNode.WebGLRenderCmd._init_once = true;
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if (cc.ClippingNode.WebGLRenderCmd._init_once) {
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cc.stencilBits = cc._renderContext.getParameter(cc._renderContext.STENCIL_BITS);
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if (cc.stencilBits <= 0)
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cc.log("Stencil buffer is not enabled.");
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cc.ClippingNode.WebGLRenderCmd._init_once = false;
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}
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};
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proto.transform = function (parentCmd, recursive) {
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var node = this._node;
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this.originTransform(parentCmd, recursive);
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if (node._stencil) {
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node._stencil._renderCmd.transform(this, true);
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node._stencil._dirtyFlag &= ~cc.Node._dirtyFlags.transformDirty;
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}
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};
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proto.clippingVisit = function (parentCmd) {
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var node = this._node;
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parentCmd = parentCmd || this.getParentRenderCmd();
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this.visit(parentCmd);
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// if stencil buffer disabled
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if (cc.stencilBits < 1) {
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// draw everything, as if there were no stencil
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node._visitChildren();
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return;
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}
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if (!node._stencil || !node._stencil.visible) {
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if (node.inverted)
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node._visitChildren(); // draw everything
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return;
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}
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if (cc.ClippingNode.WebGLRenderCmd._layer + 1 === cc.stencilBits) {
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cc.ClippingNode.WebGLRenderCmd._visit_once = true;
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if (cc.ClippingNode.WebGLRenderCmd._visit_once) {
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cc.log("Nesting more than " + cc.stencilBits + "stencils is not supported. Everything will be drawn without stencil for this node and its children.");
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cc.ClippingNode.WebGLRenderCmd._visit_once = false;
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}
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// draw everything, as if there were no stencil
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node._visitChildren();
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return;
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}
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cc.renderer.pushRenderCommand(this._beforeVisitCmd);
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// node._stencil._stackMatrix = node._stackMatrix;
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node._stencil.visit(node);
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cc.renderer.pushRenderCommand(this._afterDrawStencilCmd);
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// draw (according to the stencil test func) this node and its children
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var locChildren = node._children;
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if (locChildren && locChildren.length > 0) {
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var childLen = locChildren.length;
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node.sortAllChildren();
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// draw children zOrder < 0
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for (var i = 0; i < childLen; i++) {
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locChildren[i].visit(node);
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}
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}
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cc.renderer.pushRenderCommand(this._afterVisitCmd);
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this._dirtyFlag = 0;
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};
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proto.setStencil = function (stencil) {
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var node = this._node;
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if (node._stencil)
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node._stencil._parent = null;
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node._stencil = stencil;
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if (node._stencil)
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node._stencil._parent = node;
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};
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proto.resetProgramByStencil = function () {
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var node = this._node;
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if (node._stencil) {
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var program = node._originStencilProgram;
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setProgram(node._stencil, program);
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}
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};
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proto._onBeforeVisit = function (ctx) {
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var gl = ctx || cc._renderContext, node = this._node;
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cc.ClippingNode.WebGLRenderCmd._layer++;
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// mask of the current layer (ie: for layer 3: 00000100)
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var mask_layer = 0x1 << cc.ClippingNode.WebGLRenderCmd._layer;
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// mask of all layers less than the current (ie: for layer 3: 00000011)
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var mask_layer_l = mask_layer - 1;
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// mask of all layers less than or equal to the current (ie: for layer 3: 00000111)
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//var mask_layer_le = mask_layer | mask_layer_l;
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this._mask_layer_le = mask_layer | mask_layer_l;
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// manually save the stencil state
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this._currentStencilEnabled = gl.isEnabled(gl.STENCIL_TEST);
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gl.clear(gl.DEPTH_BUFFER_BIT);
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// enable stencil use
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gl.enable(gl.STENCIL_TEST);
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gl.depthMask(false);
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gl.stencilFunc(gl.NEVER, mask_layer, mask_layer);
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gl.stencilOp(gl.REPLACE, gl.KEEP, gl.KEEP);
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gl.stencilMask(mask_layer);
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gl.clear(gl.STENCIL_BUFFER_BIT);
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if (node.alphaThreshold < 1) { //TODO desktop
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var program = cc.shaderCache.programForKey(cc.SHADER_POSITION_TEXTURECOLORALPHATEST);
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// set our alphaThreshold
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cc.glUseProgram(program.getProgram());
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program.setUniformLocationWith1f(cc.UNIFORM_ALPHA_TEST_VALUE_S, node.alphaThreshold);
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program.setUniformLocationWithMatrix4fv(cc.UNIFORM_MVMATRIX_S, cc.renderer.mat4Identity.mat);
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cc.setProgram(node._stencil, program);
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}
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};
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proto._onAfterDrawStencil = function (ctx) {
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var gl = ctx || cc._renderContext;
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gl.depthMask(true);
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gl.stencilFunc(!this._node.inverted ? gl.EQUAL : gl.NOTEQUAL, this._mask_layer_le, this._mask_layer_le);
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gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
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};
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proto._onAfterVisit = function (ctx) {
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var gl = ctx || cc._renderContext;
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cc.ClippingNode.WebGLRenderCmd._layer--;
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if (this._currentStencilEnabled) {
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var mask_layer = 0x1 << cc.ClippingNode.WebGLRenderCmd._layer;
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var mask_layer_l = mask_layer - 1;
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var mask_layer_le = mask_layer | mask_layer_l;
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gl.stencilMask(mask_layer);
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gl.stencilFunc(gl.EQUAL, mask_layer_le, mask_layer_le);
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}
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else {
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gl.disable(gl.STENCIL_TEST);
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}
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};
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})();
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