Align Text on generated image[Answered] RSS

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Last post May 14, 2010 02:43 AM by vipindas

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pyu.agrawal

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Align Text on generated image

May 05, 2010 10:20 AM|pyu.agrawal|LINK

Hi All

I'm creating an image using the code:

Bitmap oBmp1 = (Bitmap)Bitmap.FromFile(Server.MapPath("~/Images/EndCaps/") + endCap);
string stickerDirection = string.Empty;
Graphics oGrp1 = Graphics.FromImage(oBmp1);
Color oColor = new Color();
string sText = string.Empty;
string sFont = ddFontName.SelectedItem.Text;
PointF oPoint;
SolidBrush oBrush = new SolidBrush(oColor);
oGrp1.FillRectangle(oBrush, 0, 0, 75, 340);
oGrp1.DrawString(sText, oFont, oBrushWrite, oPoint, drawFormat);
string fileName = Guid.NewGuid().ToString();
oBmp1.Save(Server.MapPath("~/UploadImages") + "\\" + fileName + ".jpg", ImageFormat.Jpeg);

I also need to align (all three left, right, center) the text that's written on the image. The text can also be written in inverted position.

Any help there ?

Thanks.

Peeyush

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pyu.agrawal
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Re: Align Text on generated image

May 05, 2010 11:01 PM|pyu.agrawal|LINK

Please have a look at the images.

Image 1

Image 2

Peeyush

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Vipindas
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Re: Align Text on generated image

May 06, 2010 07:37 AM|Vipindas|LINK

First calculate string width & height.

SizeF oSize = oGrp1.MeasureString("sText", oFont);

PointF oPoint = new PointF((75/2) - (oSize.Width/2), (340/2) - (oSize.Height/2));

oGrp1.DrawString(sText, oFont, oBrushWrite, oPoint, drawFormat);
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pyu.agrawal
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Re: Align Text on generated image

May 06, 2010 02:26 PM|pyu.agrawal|LINK

I suppose this will only help to center align the text. What about left/right align ?

Thanks

Peeyush

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Vipindas
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Re: Align Text on generated image

May 10, 2010 07:56 AM|Vipindas|LINK

Left Align

SizeF oSize = oGrp1.MeasureString("sText", oFont);
PointF oPoint = new PointF(0, (340/2) - (oSize.Height/2));
oGrp1.DrawString(sText, oFont, oBrushWrite, oPoint, drawFormat);

Right Align
SizeF oSize = oGrp1.MeasureString("sText", oFont);
PointF oPoint = new PointF(75 - oSize.Width, (340/2) - (oSize.Height/2));
oGrp1.DrawString(sText, oFont, oBrushWrite, oPoint, drawFormat);
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pyu.agrawal
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Re: Align Text on generated image

May 12, 2010 03:02 AM|pyu.agrawal|LINK

Even this did not help. The text is placed somewhere outside the generated image.

Peeyush

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Vipindas
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Re: Align Text on generated image

May 12, 2010 06:24 AM|Vipindas|LINK

http://aspalliance.com/413_Fills_shading_and_alignment_with_GDI

http://www.switchonthecode.com/tutorials/csharp-snippet-tutorial-how-to-draw-text-on-an-image
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Vipindas
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Re: Align Text on generated image

May 12, 2010 06:43 AM|Vipindas|LINK

protected void btnAdd_Click(object sender, EventArgs e)
{

          var image = Image.FromFile("C:\\Users\\Public\\Pictures\\Sample Pictures\\Jellyfish.jpg");

            int thumbnailSize = 400;
            int newWidth, newHeight;

            if (image.Width > image.Height)
            {
                newWidth = thumbnailSize;
                newHeight = image.Height * thumbnailSize / image.Width;
            }
            else
            {
                newWidth = image.Width * thumbnailSize / image.Height;
                newHeight = thumbnailSize;
            }

            var thumbnailBitmap = new Bitmap(newWidth, newHeight);

            var thumbnailGraph = Graphics.FromImage(thumbnailBitmap);
            thumbnailGraph.CompositingQuality = CompositingQuality.HighQuality;
            thumbnailGraph.SmoothingMode = SmoothingMode.HighQuality;
            thumbnailGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;

            var imageRectangle = new Rectangle(0, 0, newWidth, newHeight);
            thumbnailGraph.DrawImage(image, imageRectangle);

            StringFormat strFormat = new StringFormat();
            strFormat.Alignment = StringAlignment.Far; // This will algin Left(Near), Center, Right (Far)
            strFormat.LineAlignment = StringAlignment.Center;

            Font font = new Font("Arial", 24, FontStyle.Bold, GraphicsUnit.Pixel);
            Color color = Color.White;
            SolidBrush brush = new SolidBrush(color);
            thumbnailGraph.DrawString("Your Text", font, brush, new RectangleF(0, 0, newWidth, newHeight), strFormat);

            thumbnailBitmap.Save(Server.MapPath("~/Output.jpg"), image.RawFormat);
            thumbnailGraph.Dispose();
            thumbnailBitmap.Dispose();
            image.Dispose();

}

I have checked and its working correct
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Vipindas
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Re: Align Text on generated image

May 12, 2010 06:51 AM|Vipindas|LINK

you can also use strFormat.FormatFlags property to change text direction

strFormat.FormatFlags = StringFormatFlags.DirectionVertical;
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pyu.agrawal
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Re: Align Text on generated image

May 14, 2010 01:31 AM|pyu.agrawal|LINK

Thanks. Your code did help.

Please refer the image, wherein the text Asp.net is now aligned, but the last character 't' appears to be left aligned even though its' not.

Is there any way to make it appear center aligned.

Peeyush

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Vipindas
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Re: Align Text on generated image

May 14, 2010 02:43 AM|Vipindas|LINK

StringFormat strFormat = new StringFormat();
strFormat.Alignment = StringAlignment.Far; // This will algin Left(Near), Center, Right (Far)
strFormat.LineAlignment = StringAlignment.Center;

Font font = new Font("Arial", 24, FontStyle.Bold, GraphicsUnit.Pixel);
Color color = Color.White;
SolidBrush brush = new SolidBrush(color);
thumbnailGraph.DrawString("Your Text", font, brush, new RectangleF(0, 0, Rectangle width here, Rectangle height here), strFormat);