You need to use base64_decode(). AND. Sometimes it is not sufficient. Here is all code that you need: $img = $_POST[‘data’]; $img = str_replace(‘data:image/png;base64,’, ”, $img); $img = str_replace(‘ ‘, ‘+’, $img); $fileData = base64_decode($img); //saving $fileName=”photo.png”; file_put_contents($fileName, $fileData); P.S. I used this code to get PNG image from html canvas.
Disclaimer: I’m the author of RealFaviconGenerator, which I expect to be up-to-date (mostly, see below). So don’t be surprised if this answer matches what RFG generates. The one-size-fits-all myth There is no “one size fits all” icon. You can’t create a single SVG icon and expect it to work everywhere. From a technical point of … Read more
Unfortunately, .NET (and GDI+, which the .NET graphics libraries are built on) does not support any encoding parameters for PNG. In fact, if you call GetEncoderParameterList on your image with the PNG encoder Clsid, you’ll get a “Not implemented” exception. Even more unfortunate is that both ImageFormat and ImageCodecInfo are sealed classes and you can’t … Read more
JPanel dPanel; … public void save() { BufferedImage bImg = new BufferedImage(dPanel.getWidth(), dPanel.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D cg = bImg.createGraphics(); dPanel.paintAll(cg); try { if (ImageIO.write(bImg, “png”, new File(“./output_image.png”))) { System.out.println(“– saved”); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }
Since the limitation in this case is the call to plt.savefig() it cannot be optimized a lot. Internally the figure is rendered from scratch and that takes a while. Possibly reducing the number of vertices to be drawn might reduce the time a bit. The time to run your code on my machine (Win 8, … Read more
Use the image as mask and you can do it: .img { width:150px; height:150px; display:inline-block; background:red; -webkit-mask:url(“https://i.ibb.co/FhZb3Xs/CJcLK.png”) center/contain; mask:url(“https://i.ibb.co/FhZb3Xs/CJcLK.png”) center/contain; } img { width:150px; height:150px; } <div class=”img”></div> <div class=”img” style=”background:#2a4f6c”></div> <img src=”https://i.ibb.co/FhZb3Xs/CJcLK.png” >
You can read more about Xcode’s PNG compression here: http://iphonedevelopment.blogspot.com/2008/10/iphone-optimized-pngs.html While you can turn off PNG optimization/compression entirely using “Compress PNG Files” in your project settings (it’s visible only if the project’s Base SDK is set to a device SDK, not a simulator SDK), you don’t want to do this! Read the link above for … Read more
A solution to embed an image directly in an HTML page would be to use the data URI scheme For instance, you could use some portion of HTML that looks like this : <img src=”data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGP C/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IA AAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1J REFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jq ch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0 vr4MkhoXe0rZigAAAABJRU5ErkJggg==” alt=”Red dot” /> There are other solutions on the wikipedia page I linked to … Read more
You just need imagepng() then. In fact it almost becomes a one-liner: imagepng(imagecreatefromstring(file_get_contents($filename)), “output.png”); You would use $_FILES[“id”][“tmp_name”] for the filename, and a different output filename obviously. But the image format probing itself would become redundant.
Example text file (named myres.rc): MYPNG RCDATA mypng.png Added to project: {$R ‘myres.res’ ‘myres.rc’} Example of loading at runtime: uses PngImage; var Png: TPngImage; begin Png := TPngImage.Create; try Png.LoadFromResourceName(HInstance, ‘MYPNG’); Image1.Picture.Graphic := Png; // Image1: TImage on the form finally Png.Free; end; end;