I want to create a small application that allows me to insert an image on top of another image.And also i want to insert some text as well.
So can someone points me out where to start.Is there any open source libraries that allows me to do this task?.
I am after a solution that can be implemented in C#,Visual Studio .net.
Thanks.
You need to use the Graphics class.
For example:
using(var oldImage = Bitmap.FromFile(path))
using(var newImage = new Bitmap(250, 250))
using(var graphics = Graphics.FromImage(newImage)) {
graphics.DrawImage(oldImage, 10, 15);
graphics.DrawString("Hello, world!", SystemFonts.DefaultFont, Brushes.Red, 0, 0);
newImage.Save(path);
}
Try ImageMagick.Net. Lotsa stuff in there.
You should be OK using System.Drawing.Graphics if you don't need anything too fancy.
Related
I'm trying to add a PNG image to an existing pdf, but the transparency is converted to black color.
PdfReader reader = new PdfReader(pdfPath);
File f = new File(pdfPath);
String result = f.getParent() + File.separator + UUID.randomUUID().toString() + ".pdf";
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(result));
Image image = Image.getInstance(ImageIO.read(new File(imagePath)), null);
PdfImage stream = new PdfImage(image, null, null);
PdfIndirectObject ref = stamper.getWriter().addToBody(stream);
image.setDirectReference(ref.getIndirectReference());
image.setAbsolutePosition(30, 300);
PdfContentByte canvas = stamper.getOverContent(1);
canvas.addImage(image);
stamper.close();
reader.close();
How can I keep transparency?
First this: I am violating the policy at iText Software by answering this question. You are using an old version of iText, and the policy dictates that voluntary support on iText 5 or earlier has stopped. You should either use iText 7, or you should get a support contract if you still want support for an old iText version.
However, I am curious. I want to know where you found this clunky code (or why you decided to write this code):
Image image = Image.getInstance(ImageIO.read(new File(imagePath)), null);
PdfImage stream = new PdfImage(image, null, null);
PdfIndirectObject ref = stamper.getWriter().addToBody(stream);
image.setDirectReference(ref.getIndirectReference());
image.setAbsolutePosition(30, 300);
PdfContentByte canvas = stamper.getOverContent(1);
canvas.addImage(image);
You don't need ImageIO and you don't need to create a PdfImage, nor do you need to add that image to the body of a PDF file. The code you are using is code specialists would use for a very particular purpose. If you know that particular purpose, please explain.
If adding an image at an absolute position is all you want to do (that's a general purpose, not a particular purpose), your code should be as simple as this:
Image image = Image.getInstance(imagePath);
image.setAbsolutePosition(30, 300);
PdfContentByte canvas = stamper.getOverContent(1);
canvas.addImage(image);
In this case, you don't have to worry about the image mask; iText will take care of that for you.
Please also explain why you're using an outdated version of iText instead of iText 7. If you want your application to be future-proof, you should upgrade to iText 7 now (to avoid wasting time later).
I know how to use VS Extensibility to get the entire active document's text. Unfortunately, that only gets me the text and doesn't give me the formatting, and I want that too.
I can, for example, get an IWpfTextView but once I get it, I'm not sure what to do with it. Are there examples of actually getting all the formatting from it? I'm only really interested in text foreground/background color, that's it.
Note: I need the formatted text on every edit, so unfortunately doing cut-and-paste using the clipboard is not an option.
Possibly the simplest method is to select all of the text and copy it to the clipboard. VS puts the rich text into the clipboard, so when you paste, elsewhere, you'll get the colors (assuming you handle rich text in your destination).
Here's my not-the-simplest solution. TL;DR: you can jump to the code at https://github.com/jimmylewis/GetVSTextViewFormattedTextSample.
The VS editor uses "classifications" to show segments of text which have special meaning. These classifications can then be formatted differently according to the language and user settings.
There's an API for getting the classifications in a document, but it didn't work for me. Or other people, apparently. But we can still get the classifications through an ITagAggregator<IClassificationTag>, as described in the preceding link, or right here:
[Import]
IViewTagAggregatorFactoryService tagAggregatorFactory = null;
// in some method...
var classificationAggregator = tagAggregatorFactory.CreateTagAggregator<IClassificationTag>(textView);
var wholeBufferSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, 0, textBuffer.CurrentSnapshot.Length);
var tags = classificationAggregator.GetTags(wholeBufferSpan);
Armed with these, we can rebuild the document. It's important to note that some text is not classified, so you have to piece everything together in chunks.
It's also notable that at this point, we have no idea how any of these tags are formatted - i.e. the colors used during rendering. If you want to, you can define your own mapping from IClassificationType to a color of your choice. Or, we can ask VS for what it would do using an IClassificationFormatMap. Again, remember, this is affected by user settings, Light vs. Dark theme, etc.
Either way, it could look something like this:
// Magic sauce pt1: See the example repo for an RTFStringBuilder I threw together.
RTFStringBuilder sb = new RTFStringBuilder();
var wholeBufferSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, 0, textBuffer.CurrentSnapshot.Length);
// Magic sauce pt2: see the example repo, but it's basically just
// mapping the spans from the snippet above with the formatting settings
// from the IClassificationFormatMap.
var textSpans = GetTextSpansWithFormatting(textBuffer);
int currentPos = 0;
var formattedSpanEnumerator = textSpans.GetEnumerator();
while (currentPos < wholeBufferSpan.Length && formattedSpanEnumerator.MoveNext())
{
var spanToFormat = formattedSpanEnumerator.Current;
if (currentPos < spanToFormat.Span.Start)
{
int unformattedLength = spanToFormat.Span.Start - currentPos;
SnapshotSpan unformattedSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, currentPos, unformattedLength);
sb.AppendText(unformattedSpan.GetText(), System.Drawing.Color.Black);
}
System.Drawing.Color textColor = GetTextColor(spanToFormat.Formatting.ForegroundBrush);
sb.AppendText(spanToFormat.Span.GetText(), textColor);
currentPos = spanToFormat.Span.End;
}
if (currentPos < wholeBufferSpan.Length)
{
// append any remaining unformatted text
SnapshotSpan unformattedSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, currentPos, wholeBufferSpan.Length - currentPos);
sb.AppendText(unformattedSpan.GetText(), System.Drawing.Color.Black);
}
return sb.ToString();
Hope this helps with whatever you're doing. The example repo will ask if you you want the formatted text in the clipboard after each edit, but that was just a dirty way that I could test and see that it worked. It's annoying, but it was just a PoC.
I am trying to create a notification Icon based application in which I want to display some numbers ranging from 1-999.
I looked at this video which is similar to what I want to do but here the system tray icon just displays the icon and it shows a pop up rather than the system tray icon showing the number or any text.
Excluding the popup item, all I want to do is to read a number (input from somewhere) and display that number in the notification icon section.
I am open to trying any technology (QT, .net) for doing this. Basically, I am looking for some examples.
While parts of your question are vague, this is very possible, I'd even dare-say quite simple. Since you mentioned you're open to trying any technology, C# would probably simplify things for you.
Generate a new 16 x 16 Bitmap and draw the number to it using the Graphics class.
Convert the Image instance to an Icon instance, after disposing of your Graphics object.
Set the Icon property of your NotifyIcon to the icon you've just created.
These are the basic steps. You'll likely need to do some research if you aren't familiar with the classes used.
Thanks for replying to my question. Here is what I came up with. Not sure if this is what you were talking about.
Bitmap bmp = new Bitmap(WindowsFormsApplication2.Properties.Resources._16by16BitmapIcon);
RectangleF rectf = new RectangleF(2, 2, 16, 16);
Graphics g = Graphics.FromImage(bmp);
g.DrawString("99", new Font("Tahoma", 7), Brushes.Blue, rectf);
pictureBox1.Image = bmp;
pictureBox1.Height = bmp.Height;
pictureBox1.Width = bmp.Width;
g.Dispose();
var thumb = (Bitmap)bmp.GetThumbnailImage(64, 64, null, IntPtr.Zero);
thumb.MakeTransparent();
notifyIcon1.Icon = Icon.FromHandle(thumb.GetHicon());
Now my next question could this be done in a better way? This is my first C Sharp app so any suggestions are welcome!
public void ShowText(string text, Font font, Color col)
{
Brush brush = new SolidBrush(col);
// Create a bitmap and draw text on it
Bitmap bitmap = new Bitmap(16, 16);
Graphics graphics = Graphics.FromImage(bitmap);
graphics.DrawString(text, font, brush, 0, 0);
// Convert the bitmap with text to an Icon
Icon icon = Icon.FromHandle(bitmap.GetHicon());
m_notifyIcon.Icon = icon;
}
I used spritext() method for the animation, and I tried to release the memory of spritesheets by using the dispose() method, but it is showing error.
How to release the memory of spritesheets?
local spritext = require("spritext")
local arr = {"images/rainbow2.png","images/rainbow1.png"}
local myAnim = spritext.newAnim(arr[1], 600,350, 1, 15);
myAnim.x = display.contentWidth/2;
myAnim.y = display.contentHeight/2 -70;
r:insert(myAnim);
myAnim:play{ startFrame=1, endFrame=15, loop=1 }
local function cleanUp()
myAnim:dispose();
end
Are you using the API for SpriteSheet? I believe that object:dispose is deprecated.
The new way of using it is via SpriteObject, and it inherits from the DisplayObject API.
http://docs.coronalabs.com/api/type/SpriteObject/index.html - SpriteObject
You should able to call object:removeSelf from the DisplayObject API. http://docs.coronalabs.com/api/type/DisplayObject/removeSelf.html
Here is a snippet of how I handle my spritesheets.
-- Import sprite sheet
local someSheet = graphics.newImageSheet( "someimages.png", someInfo:getSheet() ) -- ImageSheet.png is the image Texture packer published
-- Set sprite sequence data.
local someSequenceData = {
{ name="dance", frames={8,1,2,3,4,5,4,3,2,1,8}, time=2000, loopCount=1},
{ name="sad", frames={8,9,8}, time=3000, loopCount=1},
{ name="happy", frames={8,5,8}, time=3000, loopCount=1},
{ name="smile", frames={8,10,8}, time=3000, loopCount=1},
{ name="hit", frames={7,8}, time=2000, loopCount=1}
}
-- load sprite object
spriteObject = display.newSprite( someSheet, someSequenceData )
spriteObject.x = display.contentWidth/2
spriteObject.y = display.contentHeight/2
-- play one of the animations
spriteObject:play("dance")
-- to remove the entire sprite object
spriteObject:removeSelf()
A quick note:
For my spritesheets I use a application called "TexturePacker", I just drop some images in, set some settings, and then it builds a packed sprite sheet, along with a data sheet to go along with it.
EDIT:
I didn't realize this question is rather old.. Oh well. I hope this helps someone out anyway. :P
When I use:
loader = new MovieClipLoader();
_root.createEmptyMovieClip("level1",getNextHighestDepth());
_root.level1.createEmptyMovieClip("image",getNextHighestDepth());
loader.loadClip("http://someimage.jpg",_root.level1.image);
...it works and the image shows up.
But when I use:
loader = new MovieClipLoader();
_root.createEmptyMovieClip("level1",getNextHighestDepth());
_root.level1.createEmptyMovieClip("level2",getNextHighestDepth());
_root.level1.level2.createEmptyMovieClip("image",getNextHighestDepth());
loader.loadClip("http://someimage.jpg",_root.level1.level2.image);
...the image doesn't show up. Can anyone tell me why? How can I make this work?
the depth you are supplying is going to be '1'. is that what you are expecting?
each movie clip has it's own set of depths, so the nextHighestDepth() of the newly create 'image' mc, will be 1. it should not prevent loading the image though.
As gthmb says, you should call getNextHighestDepth() on the same MovieClip as you do the createEmptyMovieClip() on. So your code example should be more like:
loader = new MovieClipLoader();
_root.createEmptyMovieClip("level1",_root.getNextHighestDepth());
_root.level1.createEmptyMovieClip("level2",_root.level1.getNextHighestDepth());
_root.level1.level2.createEmptyMovieClip("image",_root.level1.level2.getNextHighestDepth());
loader.loadClip("http://someimage.jpg",_root.level1.level2.image);
Also, I would recommend storing references to the created MovieClips, so you won't have to use the full path in each occurrence in the code, something in the lines of this:
loader = new MovieClipLoader();
var level1:MovieClip = _root.createEmptyMovieClip("level1",_root.getNextHighestDepth());
var level2:MovieClip = level1.createEmptyMovieClip("level2",level1.getNextHighestDepth());
var image:MovieClip = level2.createEmptyMovieClip("image",level2.getNextHighestDepth());
loader.loadClip("http://someimage.jpg",image);