more examples

Author: jcupitt

examples/progress.php

@@ -0,0 +1,28 @@
+#!/usr/bin/php
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+use Jcupitt\Vips;
+
+#Vips\Config::setLogger(new Vips\DebugLogger());
+
+$image = Vips\Image::black(1, 1000000);
+$image->setProgress(true);
+
+$image->signalConnect("preeval", function($image, $progress) {
+    echo "preeval:\n";
+});
+$image->signalConnect("eval", function($image, $progress) {
+    echo "eval: $progress->percent % complete\r";
+});
+
+$image->signalConnect("posteval", function($image, $progress) {
+    echo "\nposteval:\n";
+});
+
+// trigger evaluation
+$image->avg();
+
+$image = null;
+
+Vips\FFI::shutDown();

examples/streaming-custom.php

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+#!/usr/bin/env php
+<?php
+
+require dirname(__DIR__) . '/vendor/autoload.php';
+
+use Jcupitt\Vips;
+
+if (count($argv) != 4) {
+    echo "usage: $argv[0] IN-FILE OUT-FILE FORMAT\n";
+    echo "  eg.: $argv[0] ~/pics/k2.jpg x.tif .tif[tile,pyramid]\n";
+    exit(1);
+}
+
+$in_file = fopen($argv[1], 'r');
+$source = new Vips\VipsSourceCustom();
+$source->onRead(function ($bufferLength) use (&$in_file) {
+    // return 0 for EOF, -ve for read error
+    return fread($in_file, $bufferLength);
+});
+// seek is optional
+$source->onSeek(function ($offset, $whence) use (&$in_file) {
+    if (fseek($in_file, $offset, $whence)) {
+        return -1;
+    }
+
+    return ftell($in_file);
+});
+
+// open for write and read ... formats like tiff need to be able to seek back
+// in the output and update bytes later 
+$out_file = fopen($argv[2], 'w+');
+$target = new Vips\VipsTargetCustom();
+$target->onWrite(function ($buffer) use (&$out_file) {
+    $result = fwrite($out_file, $buffer);
+    if ($result === false) {
+        // IO error
+        return -1;
+    }
+    else
+        return $result;
+});
+// read and seek are optional
+$target->onSeek(function ($offset, $whence) use (&$out_file) {
+    if (fseek($out_file, $offset, $whence)) {
+        return -1;
+    }
+
+    return ftell($out_file);
+});
+$target->onRead(function ($bufferLength) use (&$out_file) {
+    return fread($out_file, $bufferLength);
+});
+
+$image = Vips\Image::newFromSource($source);
+$image->writeToTarget($target, $argv[3]);