phaser/Phaser/renderers/canvas/SpriteRenderer.js

var Phaser;
(function (Phaser) {
    (function (Renderer) {
        /// <reference path="../../_definitions.ts" />
        (function (Canvas) {
            var SpriteRenderer = (function () {
                function SpriteRenderer(game) {
                    //  Local rendering related temp vars to help avoid gc spikes through constant var creation
                    //private _c: number = 0;
                    this._ga = 1;
                    this._sx = 0;
                    this._sy = 0;
                    this._sw = 0;
                    this._sh = 0;
                    this._dx = 0;
                    this._dy = 0;
                    this._dw = 0;
                    this._dh = 0;
                    this.game = game;
                }
                /**
                * Check whether this object is visible in a specific camera Rectangle.
                * @param camera {Rectangle} The Rectangle you want to check.
                * @return {boolean} Return true if bounds of this sprite intersects the given Rectangle, otherwise return false.
                */
                SpriteRenderer.prototype.inCamera = function (camera, sprite) {
                    if (sprite.transform.scrollFactor.equals(0)) {
                        return true;
                    }

                    //return RectangleUtils.intersects(sprite.cameraView, camera.screenView);
                    return true;
                };

                /**
                * Render this sprite to specific camera. Called by game loop after update().
                * @param camera {Camera} Camera this sprite will be rendered to.
                * @return {boolean} Return false if not rendered, otherwise return true.
                */
                SpriteRenderer.prototype.render = function (camera, sprite) {
                    Phaser.SpriteUtils.updateCameraView(camera, sprite);

                    if (sprite.transform.scale.x == 0 || sprite.transform.scale.y == 0 || sprite.texture.alpha < 0.1 || this.inCamera(camera, sprite) == false) {
                        return false;
                    }

                    //  Reset our temp vars
                    this._ga = -1;
                    this._sx = 0;
                    this._sy = 0;
                    this._sw = sprite.texture.width;
                    this._sh = sprite.texture.height;

                    //this._dx = camera.screenView.x + sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x);
                    //this._dy = camera.screenView.y + sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y);
                    this._dx = sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x);
                    this._dy = sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y);
                    this._dw = sprite.texture.width;
                    this._dh = sprite.texture.height;

                    if (sprite.animations.currentFrame !== null) {
                        this._sx = sprite.animations.currentFrame.x;
                        this._sy = sprite.animations.currentFrame.y;

                        if (sprite.animations.currentFrame.trimmed) {
                            this._dx += sprite.animations.currentFrame.spriteSourceSizeX;
                            this._dy += sprite.animations.currentFrame.spriteSourceSizeY;
                            this._sw = sprite.animations.currentFrame.spriteSourceSizeW;
                            this._sh = sprite.animations.currentFrame.spriteSourceSizeH;
                            this._dw = sprite.animations.currentFrame.spriteSourceSizeW;
                            this._dh = sprite.animations.currentFrame.spriteSourceSizeH;
                        }
                    }

                    if (sprite.modified) {
                        camera.texture.context.save();

                        camera.texture.context.setTransform(sprite.transform.local.data[0], sprite.transform.local.data[3], sprite.transform.local.data[1], sprite.transform.local.data[4], this._dx, this._dy);

                        this._dx = sprite.transform.origin.x * -this._dw;
                        this._dy = sprite.transform.origin.y * -this._dh;
                    } else {
                        this._dx -= (this._dw * sprite.transform.origin.x);
                        this._dy -= (this._dh * sprite.transform.origin.y);
                    }

                    if (sprite.crop) {
                        this._sx += sprite.crop.x * sprite.transform.scale.x;
                        this._sy += sprite.crop.y * sprite.transform.scale.y;
                        this._sw = sprite.crop.width * sprite.transform.scale.x;
                        this._sh = sprite.crop.height * sprite.transform.scale.y;
                        this._dx += sprite.crop.x * sprite.transform.scale.x;
                        this._dy += sprite.crop.y * sprite.transform.scale.y;
                        this._dw = sprite.crop.width * sprite.transform.scale.x;
                        this._dh = sprite.crop.height * sprite.transform.scale.y;
                    }

                    this._sx = Math.floor(this._sx);
                    this._sy = Math.floor(this._sy);
                    this._sw = Math.floor(this._sw);
                    this._sh = Math.floor(this._sh);
                    this._dx = Math.floor(this._dx);
                    this._dy = Math.floor(this._dy);
                    this._dw = Math.floor(this._dw);
                    this._dh = Math.floor(this._dh);

                    if (this._sw <= 0 || this._sh <= 0 || this._dw <= 0 || this._dh <= 0) {
                        return false;
                    }

                    if (sprite.texture.globalCompositeOperation) {
                        camera.texture.context.save();
                        camera.texture.context.globalCompositeOperation = sprite.texture.globalCompositeOperation;
                    }

                    if (sprite.texture.alpha !== 1 && camera.texture.context.globalAlpha != sprite.texture.alpha) {
                        this._ga = sprite.texture.context.globalAlpha;
                        camera.texture.context.globalAlpha = sprite.texture.alpha;
                    }

                    if (sprite.texture.opaque) {
                        camera.texture.context.fillStyle = sprite.texture.backgroundColor;
                        camera.texture.context.fillRect(this._dx, this._dy, this._dw, this._dh);
                    }

                    if (sprite.texture.loaded) {
                        camera.texture.context.drawImage(sprite.texture.texture, this._sx, this._sy, this._sw, this._sh, this._dx, this._dy, this._dw, this._dh);
                    }

                    if (sprite.modified || sprite.texture.globalCompositeOperation) {
                        camera.texture.context.restore();
                    }

                    if (this._ga > -1) {
                        camera.texture.context.globalAlpha = this._ga;
                    }

                    sprite.renderOrderID = this.game.renderer.renderCount;

                    this.game.renderer.renderCount++;

                    return true;
                };
                return SpriteRenderer;
            })();
            Canvas.SpriteRenderer = SpriteRenderer;
        })(Renderer.Canvas || (Renderer.Canvas = {}));
        var Canvas = Renderer.Canvas;
    })(Phaser.Renderer || (Phaser.Renderer = {}));
    var Renderer = Phaser.Renderer;
})(Phaser || (Phaser = {}));