I did found a topic similar to this, but I do not know if the solution is the same. So here is my question:
I'm using the GD functions to bild a web card generating program. The thing is that the card's backgound is generating by the $image = imagecreatefrompng(); function.
The card need's also a $cardname as "title" and a $desription as desription. For that I used the imagettftext(); function. But there is a problem, the card's size is 333x485, I need the text to be resized in order to fit in the background without resizing its height, but only the width!
To be more to the point, the $cardname should have width = 240 and height = 34, but if it doesn't fit, it goes off the background, I need a function that will resize its width in order to fit in 240px and leave the height to 34px always!
To understand it more look here: http://yugiohcardmaker.net. in the "name" you can add as much text you like, it will always fit in and in the right width and height!
I'm not going to try and code this as it will take too long, but here's the basic process:
Get the size of the bounding box for your text with imagettfbbox();
Create a new image with imagecreatetruecolor();
Write your text into your new image with imagettftext();
Use imagecopyresampled() to copy the new image with your text to your existing card, setting the parameters to shrink the width but not the height.
Note: the bounding box parameters returned by imagettfbbox()) can be fiddly to work with
You'll also need to be careful about alphablending and background colors to ensure that only your text pixels are copied.
Good luck!
Related
Lets say I have an arrays of pixels. Basically an array of this data {x,y,r,g,b,a} for each pixel.
How would I go about converting all this data into an actual image file (png preferably)?
Could not find a solution. Any help would be very appreciated.
I had some time to code up a little example. You should be able to see and note that:
the red component increases towards the bottom of the image
the green component increases towards the right of the image
the blue component is absent
the alpha channel is random and between 0 (opaque) and 127 (fully transparent)
// Define width and height
$w=800;
$h=600;
// Create truecolour image so we can have infinitely many colours rather than a limited palette
$img=imagecreatetruecolor($w,$h);
imagesavealpha($img,true);
imagealphablending($img,false);
// Iterate over all pixels
for($y=0;$y<$h;$y++){
for($x=0;$x<$w;$x++){
$r = round(255*$y/$h);
$g = round(255*$x/$w);
$b = 0;
$alpha = rand(0,127);
$color = imagecolorallocatealpha($img,$r,$g,$b,$alpha);
imagesetpixel($img,$x,$y,$color);
}
}
// Save result
imagepng($img,"result.png");
I'll admit I haven't actually used this API, but looks like PHP has what you're looking for.
You create an image identifier with imagecreate or one of the related functions, then color in each pixel with imagesetpixel, using a color identifier created with imagecolorallocatealpha. From there you should be able to output as a PNG with imagepng.
It's worth noting that this image library seems to support drawing lines and shapes and other structures higher than the per-pixel level, so I'd also look into whether your code necessarily needs to build a big pixel array, rather than drawing the image some other way.
I am trying to create a text overlay on an image using php and iMagick. The crucial part is that I want the text size to scale to fill a predefined box, so I do not want to set a fixed font size. I have found the code at ImageMagick - Text into rectangle but need to adapt this code for the iMagick. I seem to be able to do everything except the crucial part -size ${width}x100
Here's the code I have, with a few things that I have tried commented out
$draw = new ImagickDraw();
$draw->setGravity (Imagick::GRAVITY_SOUTHEAST);
$draw->setFont('Bookman-DemiItalic');
//$draw->setFontSize( 30 ); // don't want to set a fixed font size
$draw->setTextUnderColor('#00000075');
//$draw->setSize(0, 0, 200, 200); // error: Call to undefined method ImagickDraw::setSize()
//$draw->setViewBox(200, 200, 800, 800); // appears to do nothing
//$draw->rectangle(200,200,300,300); // this just draws a separate white box
$draw->annotation(100, 100, 'The quick brown fox jumps over the lazy dog'); // works, but it's a default (small) text size and the box simply fits the exact text with no border
$img->drawImage($draw);
Is there a size option that somehow I've missed in the docs?
Note that How can I wrap text using Imagick in PHP so that it is drawn as multiline text? partially addresses this issue, but it doesn't appear to offer scaling of the text to fit a fixed size box, rather a wrapping of text if the selected font size would cause the text to overrun. Though maybe I have misunderstood - I will give it a try!
I have the bounds of a rectangular box.
Is it possible to fit a text (with custom font) into the box while not knowing the text size.
I mean, is there a php function which sets the proper text size so that the text is fitted into the user-defined box?
I do not need text wrapping.
The only functions I found are imagettfbbox and imagettftext.
imagettfbbox does exactly the opposite(gives the bounds, provided a font size) while imagettftext is used to write text on an image, only if fontSize is known.
Are you using php gd? If so, then I would use imagettfbbox. Just define all the parameters except size. Then outside of that loop on size until it is small enough to fit in your defined space. I've done this before. It doesn't do any actual image creative in memory, so it's very fast (much faster than actually creating the image).
for($size=40;$size>5;$size--){
$sizearray=imagettfbbox ( $size , 0- , 'font.ttf' , $message );
$width=$sizearray[0] + $sizearray[4];
if($width<$threshold/*you define*/){
//you've got your $size
break;
}
}
I would like to rotate an image (with a user-defined angle of rotation), but without making the image smaller.
is what happens already, saving the shaded area as a smaller image
is what I would like, the dashed line being the new image size.
The server has PHP 5.3+. Links, code and explanations all very welcome.
This is not complete answer but I would take the four corners as coordinates rotate them by your angle and then calculate the new bounding box based on the extent of the new coordinates.
(assuming coordinates with origin on the bottom left).
corners = rotate_each ( [(left,top) (left,bottom), (right,top), (right,bottom)], angle)
new_bb_left = min([corners[0].x, corners[1].x, corners[2].x, corners[3].x])
new_bb_right = max([corners[0].x, corners[1].x, corners[2].x, corners[3].x])
new_bb_bottom = min([corners[0].y, corners[1].y, corners[2].y, corners[3].y])
new_bb_top = max([corners[0].y, corners[1].y, corners[2].y, corners[3].y])
This could be a way to do it. Calculate the diagonal width.
PHP has a Square root function: http://se2.php.net/manual/en/function.sqrt.php
In that way you should have the diagonal width which you could apply on the transformed image.
There are many solutions including the trigonometric formulas but this library seems to be the shortcut.
http://wideimage.sourceforge.net/
Example: http://wideimage.sourceforge.net/wp-content/current/demo/index.php?demo=rotate&output=preset%20for%20demo&colors=255&dither=1&match_palette=1
Hi all
i am displaying an image in a div and content in another div.using jquery draggable method, i placed the content in that div on the image. Now i want to save that image with content as an image. Is it possible? please answer this as it is important
It's perfectly possible to do this, but it's not trivial and I won't post all the code necessary to do it. Instead, I'll give you some pointers:
You can't save the added text "as is" client-side. That's not possible. You could take a screenshot of it, but that's probably not what you want.
Instead, you need to save the text value and the position and size of where the text is placed relative to the image.
Use relative values, e.g. x = 0.3242, y = 0.5123, width = 0.5123, height = 0.12, where x = 0, y = 0 is the top left corner of the image and x = 1, y = 1 the bottom right corner, width and height similarily representing a fraction of the image size.
POST this information to the server and recreate the same effect by baking the text into the image using, for example, gd.
For finding the right font size to use, futz around with imagettfbbox until you have found the closest equivalent in size to the target coordinates.
Use imagettftext for writing the text into the image.