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Merge pull request #73 from brianchirls/develop
Release 2014-10-13
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* global define, require */ | ||
| (function (root, factory) { | ||
| 'use strict'; | ||
|
|
||
| if (typeof define === 'function' && define.amd) { | ||
| // AMD. Register as an anonymous module. | ||
| define(['seriously'], factory); | ||
| } else if (typeof exports === 'object') { | ||
| // Node/CommonJS | ||
| factory(require('seriously')); | ||
| } else { | ||
| if (!root.Seriously) { | ||
| root.Seriously = { plugin: function (name, opt) { this[name] = opt; } }; | ||
| } | ||
| factory(root.Seriously); | ||
| } | ||
| }(this, function (Seriously) { | ||
| 'use strict'; | ||
|
|
||
| Seriously.plugin('crop', function () { | ||
| var me = this; | ||
|
|
||
| // custom resize method | ||
| function resize() { | ||
| var width = 1, | ||
| height = 1, | ||
| source = me.inputs.source, | ||
| target, | ||
| i; | ||
|
|
||
| if (me.source) { | ||
| width = me.source.width; | ||
| height = me.source.height; | ||
| } else if (me.sources && me.sources.source) { | ||
| width = me.sources.source.width; | ||
| height = me.sources.source.height; | ||
| } | ||
|
|
||
| width = width - me.inputs.left - me.inputs.right; | ||
| height = height - me.inputs.top - me.inputs.bottom; | ||
|
|
||
| width = Math.max(1, Math.floor(width)); | ||
| height = Math.max(1, Math.floor(height)); | ||
|
|
||
|
|
||
| if (me.width !== width || me.height !== height) { | ||
| me.width = width; | ||
| me.height = height; | ||
|
|
||
| me.uniforms.resolution[0] = width; | ||
| me.uniforms.resolution[1] = height; | ||
|
|
||
| if (me.frameBuffer) { | ||
| me.frameBuffer.resize(me.width, me.height); | ||
| } | ||
|
|
||
| me.emit('resize'); | ||
| me.setDirty(); | ||
| } | ||
|
|
||
| for (i = 0; i < me.targets.length; i++) { | ||
| target = me.targets[i]; | ||
| target.resize(); | ||
| if (target.setTransformDirty) { | ||
| target.setTransformDirty(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| me.resize = resize; | ||
|
|
||
| return { | ||
| commonShader: true, | ||
| shader: function (inputs, shaderSource) { | ||
| shaderSource.vertex = [ | ||
| 'precision mediump float;', | ||
|
|
||
| 'attribute vec4 position;', | ||
| 'attribute vec2 texCoord;', | ||
|
|
||
| 'uniform vec2 resolution;', | ||
| 'uniform mat4 transform;', | ||
|
|
||
| 'uniform float top;', | ||
| 'uniform float left;', | ||
| 'uniform float bottom;', | ||
| 'uniform float right;', | ||
|
|
||
| 'varying vec2 vTexCoord;', | ||
|
|
||
| 'const vec2 ZERO = vec2(0.0);', | ||
| 'const vec2 ONE = vec2(1.0);', | ||
|
|
||
| 'void main(void) {', | ||
| // first convert to screen space | ||
| ' vec4 screenPosition = vec4(position.xy * resolution / 2.0, position.z, position.w);', | ||
| ' screenPosition = transform * screenPosition;', | ||
|
|
||
| // convert back to OpenGL coords | ||
| ' gl_Position.xy = screenPosition.xy * 2.0 / resolution;', | ||
| ' gl_Position.z = screenPosition.z * 2.0 / (resolution.x / resolution.y);', | ||
| ' gl_Position.w = screenPosition.w;', | ||
|
|
||
| ' vec2 dim = resolution + vec2(right + left, bottom + top);', | ||
| ' vec2 scale = dim / resolution;', | ||
| ' vec2 offset = vec2(left, bottom) / resolution;', | ||
|
|
||
| ' vTexCoord = max(ZERO, (texCoord + offset) / scale);', | ||
| '}\n' | ||
| ].join('\n'); | ||
| return shaderSource; | ||
| }, | ||
| inputs: { | ||
| source: { | ||
| type: 'image', | ||
| uniform: 'source', | ||
| update: resize | ||
| }, | ||
| top: { | ||
| type: 'number', | ||
| uniform: 'top', | ||
| min: 0, | ||
| step: 1, | ||
| update: resize, | ||
| defaultValue: 0 | ||
| }, | ||
| left: { | ||
| type: 'number', | ||
| uniform: 'left', | ||
| min: 0, | ||
| step: 1, | ||
| update: resize, | ||
| defaultValue: 0 | ||
| }, | ||
| bottom: { | ||
| type: 'number', | ||
| uniform: 'bottom', | ||
| min: 0, | ||
| step: 1, | ||
| update: resize, | ||
| defaultValue: 0 | ||
| }, | ||
| right: { | ||
| type: 'number', | ||
| uniform: 'right', | ||
| min: 0, | ||
| step: 1, | ||
| update: resize, | ||
| defaultValue: 0 | ||
| } | ||
| } | ||
| }; | ||
| }, | ||
| { | ||
| inPlace: true, | ||
| title: 'Crop' | ||
| }); | ||
| })); |
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