StackOverflow2013

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2013-07-16T09:54:26.117
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2013-07-16T10:51:14.030
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Body
You'll just have to use a bigger image. You can't really expect any program or code to draw a circle in a image that is only 2 by 2 pixels large. Try something bigger, like having the image 5 by 5 pixels and using a radius of 2 or 3. Also any reason why you don't directly draw circles on the final image? You should add an image to show us what you're trying to achieve. <hr> Cause I've got some interest in QR codes, I've just written this sample rendering code: <pre><code><?php $qr = // The actual QR code "1111111000011010001111111". "1000001001100010001000001". "1011101000001000101011101". "1011101010001100101011101". "1011101011000100101011101". "1000001000011110001000001". "1111111010101010101111111". "0000000000110011000000000". "1100011101010111100011000". "1010000111001001000111110". "0011111000100111101001011". "0000000101001010111101001". "0100111001011011101000001". "1101000110000101100100010". "1010111010011111001111011". "1010100001110011010010101". "1010111111111111111110100". "0000000011001001100010100". "1111111011010010101011001". "1000001010110011100010011". "1011101000011111111111100". "1011101001111111011101011". "1011101000100110100100101". "1000001010100010100110001". "1111111011101000100001001"; $size = 25; // Dimension in dots $dot = 9; // Pixels per dot $img = imagecreatetruecolor($size * $dot, $size * $dot); // Enable alpha blending imagealphablending($img, true); imagesavealpha($img, true); // Allocate colors $back = imagecolorallocatealpha($img, 0, 0, 0, 127); $dots = imagecolorallocatealpha($img, 0, 64, 127, 64); // Fill the image with background/transparency imagefill($img, 0, 0, $back); // Loop over all dots and draw them: for ($y = 0, $i = 0; $y < $size; $y++) { for ($x = 0; $x < $size; $x++, $i++) { if ($qr[$i] == '1') { // Draw a dot? // Draw rectangles //imagefilledrectangle($img, $x * $dot, $y * $dot, ($x + 1) * $dot - 1, ($y + 1) * $dot - 1, $dots); // Draw circles imagefilledellipse($img, ($x + .5) * $dot), ($y + .5) * $dot, $dot - 1, $dot - 1, $dots); // Draw a second set of circles for more aliased dots imagefilledellipse($img, ($x + .5) * $dot, ($y + .5) * $dot, $dot - 2, $dot - 2, $dots); } } } // Save the result imagepng($img, "qr.png"); ?> </code></pre> This will result in the following image: <img src="https://i.stack.imgur.com/ns1nT.png" alt="Example QR code pointing to stackoverflow.com">
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1. POHow to print a qr code with brushes in PHP with GD?
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1. PTAnswer
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1. USMario
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1. USMario
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