我们如何在使用结构Js在画布上应用的php中对图像进行相同的操作（缩放和旋转）？

我已经将一个图像（已调整大小的图像）添加到画布并对其应用了缩放和旋转操作 . 画布宽度为380px，高度为217.143px .

情况1） . 仅应用缩放后的Json：

[{"objects":[{"type":"image","originX":"left","originY":"top","left":-39,"top":-62.76,"width":1000,"height":667,"fill":"rgb(0,0,0)","stroke":null,"strokeWidth":0,"strokeDashArray":null,"strokeLineCap":"butt","strokeLineJoin":"miter","strokeMiterLimit":10,"scaleX":0.83,"scaleY":0.83,"angle":0,"flipX":false,"flipY":false,"opacity":1,"shadow":null,"visible":true,"clipTo":null,"backgroundColor":"","fillRule":"nonzero","globalCompositeOperation":"source-over","transformMatrix":null,"skewX":0,"skewY":0,"src":"http:\/\/127.0.0.1\/greatcanvasprints\/web\/media\/designtool\/canvasprints\/single-print\/1813\/small_=_=_=26961_1499666667USA91235_1of12_1Panel_8x8_0-_-_-0_test.75_BorderColor_HooksforHanging_Original_1pcs_P_","filters":[],"resizeFilters":[],"crossOrigin":"","alignX":"none","alignY":"none","meetOrSlice":"meet"}],"background":null}]

案例2） . 应用缩放和旋转后的Json：

[{"objects":[{"type":"image","originX":"left","originY":"top","left":278.28,"top":-275.14,"width":1000,"height":667,"fill":"rgb(0,0,0)","stroke":null,"strokeWidth":0,"strokeDashArray":null,"strokeLineCap":"butt","strokeLineJoin":"miter","strokeMiterLimit":10,"scaleX":0.83,"scaleY":0.83,"angle":45,"flipX":false,"flipY":false,"opacity":1,"shadow":null,"visible":true,"clipTo":null,"backgroundColor":"","fillRule":"nonzero","globalCompositeOperation":"source-over","transformMatrix":null,"skewX":0,"skewY":0,"src":"http:\/\/127.0.0.1\/greatcanvasprints\/web\/media\/designtool\/canvasprints\/single-print\/1813\/small_=_=_=26961_1499666667USA91235_1of12_1Panel_8x8_0-_-_-0_test.75_BorderColor_HooksforHanging_Original_1pcs_P_","filters":[],"resizeFilters":[],"crossOrigin":"","alignX":"none","alignY":"none","meetOrSlice":"meet"}],"background":null}]

我想在PHP中对原始图像执行相同的操作而我只需要设计区域（画布区域） . 下面是PHP中的一些代码：

Php Code在第一种情况下运行良好：仅应用缩放

get Original File
$originalImg = imagecreatefromjpeg('26961_1499666667USA91235_1of12_1Panel_8x8_0-_-_-0_test.75_BorderColor_HooksforHanging_Original_1pcs_P_');

Here is width and height (pixels) of resized image which used in canvas 

$inToolUsedFileWidth = 1000;
$inToolUsedFileHeight = 667;

here is width & height (pixels) of Original File

$originalFileWidth = 5760;
$originalFileHeight = 3840;

$scaleX = 0.83 
$scaleY = 0.83 

$ratioWidth = ($originalFileWidth/$inToolUsedFileWidth) * (1 / $scaleX);   
$ratioHeight = ($originalFileHeight/$inToolUsedFileHeight) * (1 / $scaleY);  

380 default canvas width

$canvasWidth = 380 * $ratioWidth; 

217.143 default canvas height

$canvasHeight = 217.143 * $ratioHeight; 

same As first json value

$left = -39; 
$top = -62.76; 

$croppArr = array('x' => (abs($left) * $ratioWidth),'y' => (abs($top) * $ratioHeight),'width' => $canvasWidth,'height' => $canvasHeight);


$croppedImg = $this->imageCrop($originalImg,$croppArr);

只有缩放才能正常工作

案例2：应用旋转后

但是应用旋转时，我只是旋转原始图像 . 但是没有获得在画布上设计的精确设计部分 .

$originalImg = imagecreatefromjpeg('26961_1499666667USA91235_1of12_1Panel_8x8_0-_-_-0_test.75_BorderColor_HooksforHanging_Original_1pcs_P_');

// Same as second Json angle value

$antiRotation = (float) -(45); // here anti clockwise rotation in php so prepend nagetive value 
$originalImg = imagerotate($originalImg,$antiRotation,0);

然后使用上面的代码，并按照每秒json更改左侧和顶部值 .

没有得到在画布上设计的确切输出 .

我想知道在Fabric Js中旋转后我们如何重新计算对象的左侧和顶部位置 .

在第一种情况下：左= -39，顶部= -62.76，角度= 0

在第二种情况下：左= 278.28，上= -275.14和角= 45

旋转后，哪个逻辑应用于左侧和顶部位置 .

我想用PHP做同样的事情 .

由于尺寸较大，无法附加原始图像 .

Image 1 Image 2