jspdf saves document before images load

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I am trying to save multiple large base64 images to a pdf file

exportPdfv3p3(imgPath:string, x:number, y:number, width:number, height:number)

{

    var pdfFile = this.pdfItem;

    var localNumImagesLoaded = this.numImagesLoaded + 1;

    var totalNumImages = this.numImages;



    var img = new Image;

    img.src = imgPath;

    var pdfWidth = pdfFile.internal.pageSize.getWidth();



    img.onload = function()

    {

        pdfFile.addImage(img, 'PNG', pdfWidth - width - 5, y, width, height);



        console.log("localNumImagesLoaded",localNumImagesLoaded);

        if (localNumImagesLoaded > totalNumImages)

            alert("numImagesLoaded desync (too many images)");

        else if (localNumImagesLoaded < totalNumImages){}

        else // (localNumImagesLoaded == numImages)

        {

            // Total page number plugin only available in jspdf v1.0+

            if (typeof pdfFile.putTotalPages === 'function') 

            {

                pdfFile.putTotalPages(2);

            }

            // pdfFile.save("test.pdf");

            pdfFile.output('datauri');

        }

    };

    ++this.numImagesLoaded;

    console.log("this.numImagesLoaded", this.numImagesLoaded);

}

however, img.onLoad seems to be async, causing pdfFile.output to run prematurely and outputting blank spaces into the pdf.

how can i know when the images are actually loaded and added to pdf, so that i can save the pdf file at the correct time?

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

add a comment |

up vote
0
down vote

favorite

I am trying to save multiple large base64 images to a pdf file

exportPdfv3p3(imgPath:string, x:number, y:number, width:number, height:number)

{

    var pdfFile = this.pdfItem;

    var localNumImagesLoaded = this.numImagesLoaded + 1;

    var totalNumImages = this.numImages;



    var img = new Image;

    img.src = imgPath;

    var pdfWidth = pdfFile.internal.pageSize.getWidth();



    img.onload = function()

    {

        pdfFile.addImage(img, 'PNG', pdfWidth - width - 5, y, width, height);



        console.log("localNumImagesLoaded",localNumImagesLoaded);

        if (localNumImagesLoaded > totalNumImages)

            alert("numImagesLoaded desync (too many images)");

        else if (localNumImagesLoaded < totalNumImages){}

        else // (localNumImagesLoaded == numImages)

        {

            // Total page number plugin only available in jspdf v1.0+

            if (typeof pdfFile.putTotalPages === 'function') 

            {

                pdfFile.putTotalPages(2);

            }

            // pdfFile.save("test.pdf");

            pdfFile.output('datauri');

        }

    };

    ++this.numImagesLoaded;

    console.log("this.numImagesLoaded", this.numImagesLoaded);

}

however, img.onLoad seems to be async, causing pdfFile.output to run prematurely and outputting blank spaces into the pdf.

how can i know when the images are actually loaded and added to pdf, so that i can save the pdf file at the correct time?

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

add a comment |

up vote
0
down vote

favorite

I am trying to save multiple large base64 images to a pdf file

exportPdfv3p3(imgPath:string, x:number, y:number, width:number, height:number)

{

    var pdfFile = this.pdfItem;

    var localNumImagesLoaded = this.numImagesLoaded + 1;

    var totalNumImages = this.numImages;



    var img = new Image;

    img.src = imgPath;

    var pdfWidth = pdfFile.internal.pageSize.getWidth();



    img.onload = function()

    {

        pdfFile.addImage(img, 'PNG', pdfWidth - width - 5, y, width, height);



        console.log("localNumImagesLoaded",localNumImagesLoaded);

        if (localNumImagesLoaded > totalNumImages)

            alert("numImagesLoaded desync (too many images)");

        else if (localNumImagesLoaded < totalNumImages){}

        else // (localNumImagesLoaded == numImages)

        {

            // Total page number plugin only available in jspdf v1.0+

            if (typeof pdfFile.putTotalPages === 'function') 

            {

                pdfFile.putTotalPages(2);

            }

            // pdfFile.save("test.pdf");

            pdfFile.output('datauri');

        }

    };

    ++this.numImagesLoaded;

    console.log("this.numImagesLoaded", this.numImagesLoaded);

}

however, img.onLoad seems to be async, causing pdfFile.output to run prematurely and outputting blank spaces into the pdf.

how can i know when the images are actually loaded and added to pdf, so that i can save the pdf file at the correct time?

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

I am trying to save multiple large base64 images to a pdf file

exportPdfv3p3(imgPath:string, x:number, y:number, width:number, height:number)

{

    var pdfFile = this.pdfItem;

    var localNumImagesLoaded = this.numImagesLoaded + 1;

    var totalNumImages = this.numImages;



    var img = new Image;

    img.src = imgPath;

    var pdfWidth = pdfFile.internal.pageSize.getWidth();



    img.onload = function()

    {

        pdfFile.addImage(img, 'PNG', pdfWidth - width - 5, y, width, height);



        console.log("localNumImagesLoaded",localNumImagesLoaded);

        if (localNumImagesLoaded > totalNumImages)

            alert("numImagesLoaded desync (too many images)");

        else if (localNumImagesLoaded < totalNumImages){}

        else // (localNumImagesLoaded == numImages)

        {

            // Total page number plugin only available in jspdf v1.0+

            if (typeof pdfFile.putTotalPages === 'function') 

            {

                pdfFile.putTotalPages(2);

            }

            // pdfFile.save("test.pdf");

            pdfFile.output('datauri');

        }

    };

    ++this.numImagesLoaded;

    console.log("this.numImagesLoaded", this.numImagesLoaded);

}

however, img.onLoad seems to be async, causing pdfFile.output to run prematurely and outputting blank spaces into the pdf.

how can i know when the images are actually loaded and added to pdf, so that i can save the pdf file at the correct time?

angular image jspdf

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

edited 1 hour ago

Sarthak Aggarwal

63617

edited 1 hour ago

Sarthak Aggarwal

63617

edited 1 hour ago

Sarthak Aggarwal

63617

asked 2 hours ago

masterofz

New contributor

asked 2 hours ago

masterofz

asked 2 hours ago

masterofz

New contributor

masterofz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

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