/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
PIXI.glContexts = []; // this is where we store the webGL contexts for easy access.
/**
* the WebGLRenderer draws the stage and all its content onto a webGL enabled canvas. This renderer
* should be used for browsers that support webGL. This Render works by automatically managing webGLBatch's.
* So no need for Sprite Batch's or Sprite Cloud's
* Dont forget to add the view to your DOM or you will not see anything :)
*
* @class WebGLRenderer
* @constructor
* @param width=0 {Number} the width of the canvas view
* @param height=0 {Number} the height of the canvas view
* @param view {Canvas} the canvas to use as a view, optional
* @param transparent=false {Boolean} If the render view is transparent, default false
* @param antialias=false {Boolean} sets antialias (only applicable in chrome at the moment)
*
*/
PIXI.WebGLRenderer = function(width, height, view, transparent, antialias)
{
if(!PIXI.defaultRenderer)PIXI.defaultRenderer = this;
this.type = PIXI.WEBGL_RENDERER;
// do a catch.. only 1 webGL renderer..
this.transparent = !!transparent;
this.width = width || 800;
this.height = height || 600;
this.view = view || document.createElement( 'canvas' );
this.view.width = this.width;
this.view.height = this.height;
// deal with losing context..
this.contextLost = this.handleContextLost.bind(this);
this.contextRestoredLost = this.handleContextRestored.bind(this);
// console.log(this.handleContextRestored)
this.view.addEventListener('webglcontextlost', this.contextLost, false);
this.view.addEventListener('webglcontextrestored', this.contextRestoredLost, false);
this.options = {
alpha: this.transparent,
antialias:!!antialias, // SPEED UP??
premultipliedAlpha:!!transparent,
stencil:true
};
//try 'experimental-webgl'
try {
this.gl = this.view.getContext('experimental-webgl', this.options);
} catch (e) {
//try 'webgl'
try {
this.gl = this.view.getContext('webgl', this.options);
} catch (e2) {
// fail, not able to get a context
throw new Error(' This browser does not support webGL. Try using the canvas renderer' + this);
}
}
var gl = this.gl;
this.glContextId = gl.id = PIXI.WebGLRenderer.glContextId ++;
PIXI.glContexts[this.glContextId] = gl;
if(!PIXI.blendModesWebGL)
{
PIXI.blendModesWebGL = [];
PIXI.blendModesWebGL[PIXI.blendModes.NORMAL] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.ADD] = [gl.SRC_ALPHA, gl.DST_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.MULTIPLY] = [gl.DST_COLOR, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.SCREEN] = [gl.SRC_ALPHA, gl.ONE];
PIXI.blendModesWebGL[PIXI.blendModes.OVERLAY] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.DARKEN] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.LIGHTEN] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.COLOR_DODGE] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.COLOR_BURN] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.HARD_LIGHT] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.SOFT_LIGHT] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.DIFFERENCE] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.EXCLUSION] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.HUE] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.SATURATION] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.COLOR] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
PIXI.blendModesWebGL[PIXI.blendModes.LUMINOSITY] = [gl.ONE, gl.ONE_MINUS_SRC_ALPHA];
}
this.projection = new PIXI.Point();
this.projection.x = this.width/2;
this.projection.y = -this.height/2;
this.offset = new PIXI.Point(0, 0);
this.resize(this.width, this.height);
this.contextLost = false;
// time to create the render managers! each one focuses on managine a state in webGL
this.shaderManager = new PIXI.WebGLShaderManager(gl); // deals with managing the shader programs and their attribs
this.spriteBatch = new PIXI.WebGLSpriteBatch(gl); // manages the rendering of sprites
this.maskManager = new PIXI.WebGLMaskManager(gl); // manages the masks using the stencil buffer
this.filterManager = new PIXI.WebGLFilterManager(gl, this.transparent); // manages the filters
//
this.renderSession = {};
this.renderSession.gl = this.gl;
this.renderSession.drawCount = 0;
this.renderSession.shaderManager = this.shaderManager;
this.renderSession.maskManager = this.maskManager;
this.renderSession.filterManager = this.filterManager;
this.renderSession.spriteBatch = this.spriteBatch;
gl.useProgram(this.shaderManager.defaultShader.program);
gl.disable(gl.DEPTH_TEST);
gl.disable(gl.CULL_FACE);
gl.enable(gl.BLEND);
gl.colorMask(true, true, true, this.transparent);
};
// constructor
PIXI.WebGLRenderer.prototype.constructor = PIXI.WebGLRenderer;
/**
* Renders the stage to its webGL view
*
* @method render
* @param stage {Stage} the Stage element to be rendered
*/
PIXI.WebGLRenderer.prototype.render = function(stage)
{
if(this.contextLost)return;
// if rendering a new stage clear the batches..
if(this.__stage !== stage)
{
// TODO make this work
// dont think this is needed any more?
this.__stage = stage;
}
// update any textures this includes uvs and uploading them to the gpu
PIXI.WebGLRenderer.updateTextures();
// update the scene graph
stage.updateTransform();
var gl = this.gl;
// -- Does this need to be set every frame? -- //
//gl.colorMask(true, true, true, this.transparent);
gl.viewport(0, 0, this.width, this.height);
// make sure we are bound to the main frame buffer
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
if(this.transparent)
{
gl.clearColor(0, 0, 0, 0);
}
else
{
gl.clearColor(stage.backgroundColorSplit[0],stage.backgroundColorSplit[1],stage.backgroundColorSplit[2], 1);
}
gl.clear(gl.COLOR_BUFFER_BIT);
// this.projection.x = this.width/2;
//this.projection.y = -this.height/2;
this.renderDisplayObject( stage, this.projection );
// interaction
if(stage.interactive)
{
//need to add some events!
if(!stage._interactiveEventsAdded)
{
stage._interactiveEventsAdded = true;
stage.interactionManager.setTarget(this);
}
}
/*
//can simulate context loss in Chrome like so:
this.view.onmousedown = function(ev) {
console.dir(this.gl.getSupportedExtensions());
var ext = (
gl.getExtension("WEBGL_scompressed_texture_s3tc")
// gl.getExtension("WEBGL_compressed_texture_s3tc") ||
// gl.getExtension("MOZ_WEBGL_compressed_texture_s3tc") ||
// gl.getExtension("WEBKIT_WEBGL_compressed_texture_s3tc")
);
console.dir(ext);
var loseCtx = this.gl.getExtension("WEBGL_lose_context");
console.log("killing context");
loseCtx.loseContext();
setTimeout(function() {
console.log("restoring context...");
loseCtx.restoreContext();
}.bind(this), 1000);
}.bind(this);
*/
};
PIXI.WebGLRenderer.prototype.renderDisplayObject = function(displayObject, projection, buffer)
{
// reset the render session data..
this.renderSession.drawCount = 0;
this.renderSession.currentBlendMode = 9999;
this.renderSession.projection = projection;
this.renderSession.offset = this.offset;
// start the sprite batch
this.spriteBatch.begin(this.renderSession);
// start the filter manager
this.filterManager.begin(this.renderSession, buffer);
// render the scene!
displayObject._renderWebGL(this.renderSession);
// finish the sprite batch
this.spriteBatch.end();
};
/**
* Updates the textures loaded into this webgl renderer
*
* @static
* @method updateTextures
* @private
*/
PIXI.WebGLRenderer.updateTextures = function()
{
var i = 0;
//TODO break this out into a texture manager...
//for (i = 0; i < PIXI.texturesToUpdate.length; i++)
// PIXI.WebGLRenderer.updateTexture(PIXI.texturesToUpdate[i]);
for (i=0; i < PIXI.Texture.frameUpdates.length; i++)
PIXI.WebGLRenderer.updateTextureFrame(PIXI.Texture.frameUpdates[i]);
for (i = 0; i < PIXI.texturesToDestroy.length; i++)
PIXI.WebGLRenderer.destroyTexture(PIXI.texturesToDestroy[i]);
PIXI.texturesToUpdate.length = 0;
PIXI.texturesToDestroy.length = 0;
PIXI.Texture.frameUpdates.length = 0;
};
/**
* Destroys a loaded webgl texture
*
* @method destroyTexture
* @param texture {Texture} The texture to update
* @private
*/
PIXI.WebGLRenderer.destroyTexture = function(texture)
{
//TODO break this out into a texture manager...
for (var i = texture._glTextures.length - 1; i >= 0; i--)
{
var glTexture = texture._glTextures[i];
var gl = PIXI.glContexts[i];
if(gl && glTexture)
{
gl.deleteTexture(glTexture);
}
}
texture._glTextures.length = 0;
};
PIXI.WebGLRenderer.updateTextureFrame = function(texture)
{
texture.updateFrame = false;
// now set the uvs. Figured that the uv data sits with a texture rather than a sprite.
// so uv data is stored on the texture itself
texture._updateWebGLuvs();
};
/**
* resizes the webGL view to the specified width and height
*
* @method resize
* @param width {Number} the new width of the webGL view
* @param height {Number} the new height of the webGL view
*/
PIXI.WebGLRenderer.prototype.resize = function(width, height)
{
this.width = width;
this.height = height;
this.view.width = width;
this.view.height = height;
this.gl.viewport(0, 0, this.width, this.height);
this.projection.x = this.width/2;
this.projection.y = -this.height/2;
};
PIXI.createWebGLTexture = function(texture, gl)
{
if(texture.hasLoaded)
{
texture._glTextures[gl.id] = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture._glTextures[gl.id]);
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, texture.source);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, texture.scaleMode === PIXI.scaleModes.LINEAR ? gl.LINEAR : gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, texture.scaleMode === PIXI.scaleModes.LINEAR ? gl.LINEAR : gl.NEAREST);
// reguler...
if(!texture._powerOf2)
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
else
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
}
gl.bindTexture(gl.TEXTURE_2D, null);
}
return texture._glTextures[gl.id];
};
PIXI.updateWebGLTexture = function(texture, gl)
{
if( texture._glTextures[gl.id] )
{
gl.bindTexture(gl.TEXTURE_2D, texture._glTextures[gl.id]);
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, texture.source);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, texture.scaleMode === PIXI.scaleModes.LINEAR ? gl.LINEAR : gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, texture.scaleMode === PIXI.scaleModes.LINEAR ? gl.LINEAR : gl.NEAREST);
// reguler...
if(!texture._powerOf2)
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
else
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
}
gl.bindTexture(gl.TEXTURE_2D, null);
}
};
/**
* Handles a lost webgl context
*
* @method handleContextLost
* @param event {Event}
* @private
*/
PIXI.WebGLRenderer.prototype.handleContextLost = function(event)
{
event.preventDefault();
this.contextLost = true;
};
/**
* Handles a restored webgl context
*
* @method handleContextRestored
* @param event {Event}
* @private
*/
PIXI.WebGLRenderer.prototype.handleContextRestored = function()
{
//try 'experimental-webgl'
try {
this.gl = this.view.getContext('experimental-webgl', this.options);
} catch (e) {
//try 'webgl'
try {
this.gl = this.view.getContext('webgl', this.options);
} catch (e2) {
// fail, not able to get a context
throw new Error(' This browser does not support webGL. Try using the canvas renderer' + this);
}
}
var gl = this.gl;
gl.id = PIXI.WebGLRenderer.glContextId ++;
// need to set the context...
this.shaderManager.setContext(gl);
this.spriteBatch.setContext(gl);
this.maskManager.setContext(gl);
this.filterManager.setContext(gl);
this.renderSession.gl = this.gl;
gl.disable(gl.DEPTH_TEST);
gl.disable(gl.CULL_FACE);
gl.enable(gl.BLEND);
gl.colorMask(true, true, true, this.transparent);
this.gl.viewport(0, 0, this.width, this.height);
for(var key in PIXI.TextureCache)
{
var texture = PIXI.TextureCache[key].baseTexture;
texture._glTextures = [];
}
this.contextLost = false;
};
PIXI.WebGLRenderer.prototype.destroy = function()
{
// deal with losing context..
// remove listeners
this.view.removeEventListener('webglcontextlost', this.contextLost);
this.view.removeEventListener('webglcontextrestored', this.contextRestoredLost);
PIXI.glContexts[this.glContextId] = null;
this.projection = null;
this.offset = null;
// time to create the render managers! each one focuses on managine a state in webGL
this.shaderManager.destroy();
this.spriteBatch.destroy();
this.maskManager.destroy();
this.filterManager.destroy();
this.shaderManager = null;
this.spriteBatch = null;
this.maskManager = null;
this.filterManager = null;
this.gl = null;
//
this.renderSession = null;
};
PIXI.WebGLRenderer.glContextId = 0;
