mirror of
https://github.com/silverstripe/silverstripe-framework
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Database abstraction broken up into controller, connector, query builder, and schema manager, each independently configurable via YAML / Injector Creation of new DBQueryGenerator for database specific generation of SQL Support for parameterised queries, move of code base to use these over escaped conditions Refactor of SQLQuery into separate query classes for each of INSERT UPDATE DELETE and SELECT Support for PDO Installation process upgraded to use new ORM SS_DatabaseException created to handle database errors, maintaining details of raw sql and parameter details for user code designed interested in that data. Renamed DB static methods to conform correctly to naming conventions (e.g. DB::getConn -> DB::get_conn) 3.2 upgrade docs Performance Optimisation and simplification of code to use more concise API API Ability for database adapters to register extensions to ConfigureFromEnv.php
138 lines
4.2 KiB
PHP
138 lines
4.2 KiB
PHP
<?php
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/**
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* Tests for the {@link GD} class.
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*
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* @package framework
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* @subpackage tests
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*/
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class GDTest extends SapphireTest {
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public static $filenames = array(
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'gif' => 'test_gif.gif',
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'jpg' => 'test_jpg.jpg',
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'png8' => 'test_png8.png',
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'png32' => 'test_png32.png'
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);
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/**
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* Loads all images into an associative array of GD objects.
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* Optionally applies an operation to each GD
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* @param callable $callback Action to perform on each GD
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* @return array List of GD
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*/
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protected function applyToEachImage($callback = null) {
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$gds = array();
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foreach(self::$filenames as $type => $file) {
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$fullPath = realpath(dirname(__FILE__) . '/gdtest/' . $file);
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$gd = new GDBackend($fullPath);
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if($callback) {
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$gd = $callback($gd);
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}
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$gds[$type] = $gd;
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}
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return $gds;
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}
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/**
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* Takes samples from the given GD at 5 pixel increments
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* @param GDBackend $gd The source image
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* @param integer $horizontal Number of samples to take horizontally
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* @param integer $vertical Number of samples to take vertically
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* @return array List of colours for each sample, each given as an associative
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* array with red, blue, green, and alpha components
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*/
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protected function sampleAreas(GDBackend $gd, $horizontal = 4, $vertical = 4) {
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$samples = array();
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for($y = 0; $y < $vertical; $y++) {
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for($x = 0; $x < $horizontal; $x++) {
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$colour = imagecolorat($gd->getImageResource(), $x * 5, $y * 5);
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$samples[] = ImageColorsforIndex($gd->getImageResource(), $colour);
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}
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}
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return $samples;
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}
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/**
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* Asserts that two colour channels are equivalent within a given tolerance range
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* @param integer $expected
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* @param integer $actual
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* @param integer $tolerance
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*/
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protected function assertColourEquals($expected, $actual, $tolerance = 0) {
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$match =
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($expected + $tolerance >= $actual) &&
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($expected - $tolerance <= $actual);
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$this->assertTrue($match);
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}
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/**
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* Asserts that all samples given correctly correspond to a greyscale version
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* of the test image pattern
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* @param array $samples List of 16 colour samples representing each of the
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* 8 x 8 squares on the image pattern
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* @param int $alphaBits Depth of alpha channel in bits
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* @param int $tolerance Reasonable tolerance level for colour comparison
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*/
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protected function assertGreyscale($samples, $alphaBits = 0, $tolerance = 0) {
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// Check that all colour samples match
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foreach($samples as $sample) {
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$matches =
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($sample['red'] === $sample['green']) &&
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($sample['blue'] === $sample['green']);
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$this->assertTrue($matches, 'Assert colour is greyscale');
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if(!$matches) return;
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}
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// check various sample points
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$this->assertColourEquals(96, $samples[0]['red'], $tolerance);
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$this->assertColourEquals(91, $samples[2]['red'], $tolerance);
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$this->assertColourEquals(0, $samples[8]['red'], $tolerance);
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$this->assertColourEquals(127, $samples[9]['red'], $tolerance);
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// check alpha of various points
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switch($alphaBits) {
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case 0:
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$this->assertColourEquals(0, $samples[2]['alpha'], $tolerance);
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$this->assertColourEquals(0, $samples[12]['alpha'], $tolerance);
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break;
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case 1:
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$this->assertColourEquals(0, $samples[2]['alpha'], $tolerance);
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$this->assertColourEquals(127, $samples[12]['alpha'], $tolerance);
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break;
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default:
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$this->assertColourEquals(63, $samples[2]['alpha'], $tolerance);
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$this->assertColourEquals(127, $samples[12]['alpha'], $tolerance);
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break;
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}
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}
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/**
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* Tests that images are correctly transformed to greyscale
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*/
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function testGreyscale() {
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// Apply greyscaling to each image
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$images = $this->applyToEachImage(function(GDBackend $gd) {
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return $gd->greyscale();
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});
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// Test GIF (256 colour, transparency)
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$samplesGIF = $this->sampleAreas($images['gif']);
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$this->assertGreyscale($samplesGIF, 1);
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// Test JPG
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$samplesJPG = $this->sampleAreas($images['jpg']);
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$this->assertGreyscale($samplesJPG, 0, 4);
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// Test PNG 8 (indexed with alpha transparency)
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$samplesPNG8 = $this->sampleAreas($images['png8']);
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$this->assertGreyscale($samplesPNG8, 8, 4);
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// Test PNG 32 (full alpha transparency)
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$samplesPNG32 = $this->sampleAreas($images['png32']);
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$this->assertGreyscale($samplesPNG32, 8);
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}
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} |