root
96 lines
3.5 KiB
PHP
96 lines
3.5 KiB
PHP
<?php
|
|
|
|
/*
|
|
* Many of these tests use an example image like this-
|
|
*╭────╮
|
|
*│░░▒▒│ ░░ = 0 ▓▓ = 2
|
|
*│▓▓██│ ▒▒ = 1 ██ = 3
|
|
*╰────╯
|
|
*/
|
|
use PHPUnit\Framework\TestCase;
|
|
use Mike42\GfxPhp\Image;
|
|
use Mike42\GfxPhp\IndexedRasterImage;
|
|
use Mike42\GfxPhp\RgbRasterImage;
|
|
|
|
class IndexedRasterImageTest extends TestCase
|
|
{
|
|
|
|
protected function createIndexedTestImage() {
|
|
$image = IndexedRasterImage::create(2, 2, null, [
|
|
[255, 255, 255],
|
|
[160, 160, 160],
|
|
[80, 80, 80],
|
|
[0, 0, 0]]);
|
|
$image -> setPixel(0, 0, 0);
|
|
$image -> setPixel(1, 0, 1);
|
|
$image -> setPixel(0, 1, 2);
|
|
$image -> setPixel(1, 1, 3);
|
|
return $image;
|
|
}
|
|
|
|
public function testCreate()
|
|
{
|
|
$img = $this -> createIndexedTestImage();
|
|
$this -> assertEquals(2, $img -> getWidth());
|
|
$this -> assertEquals(2, $img -> getHeight());
|
|
$this -> assertEquals(255, $img -> getMaxVal());
|
|
$this -> assertEquals("▄▄\n", $img -> toBlackAndWhite() -> toString());
|
|
}
|
|
|
|
public function testReduceDepthTo1Bit()
|
|
{
|
|
$img = $this -> createIndexedTestImage();
|
|
$img -> setMaxVal(1);
|
|
$this -> assertEquals(0, $img -> getPixel(0, 0));
|
|
$this -> assertEquals(0, $img -> getPixel(1, 0));
|
|
$this -> assertEquals(1, $img -> getPixel(0, 1));
|
|
$this -> assertEquals(1, $img -> getPixel(1, 1));
|
|
}
|
|
|
|
public function testToGrayscale() {
|
|
$img = $this -> createIndexedTestImage() -> toGrayscale();
|
|
$this -> assertEquals(255, $img -> getPixel(0, 0));
|
|
$this -> assertEquals(160, $img -> getPixel(1, 0));
|
|
$this -> assertEquals(80, $img -> getPixel(0, 1));
|
|
$this -> assertEquals(0, $img -> getPixel(1, 1));
|
|
}
|
|
|
|
public function testToRgb() {
|
|
$white = RgbRasterImage::rgbToInt(255, 255, 255);
|
|
$lightGray = RgbRasterImage::rgbToInt(160, 160, 160);
|
|
$darkGray = RgbRasterImage::rgbToInt(80, 80, 80);
|
|
$black = RgbRasterImage::rgbToInt(0, 0, 0);
|
|
$img = $this -> createIndexedTestImage() -> toRgb();
|
|
$this -> assertEquals($white, $img -> getPixel(0, 0));
|
|
$this -> assertEquals($lightGray, $img -> getPixel(1, 0));
|
|
$this -> assertEquals($darkGray, $img -> getPixel(0, 1));
|
|
$this -> assertEquals($black, $img -> getPixel(1, 1));
|
|
}
|
|
|
|
public function testRgbToIndexExists() {
|
|
$img = $this -> createIndexedTestImage();
|
|
$idx = $img -> rgbToIndex([80, 80, 80]);
|
|
$this -> assertEquals(2, $idx);
|
|
}
|
|
|
|
public function testQuantizeGrayscale() {
|
|
// Produce 8-bit grayscale image via high color-count RGBA
|
|
$img = Image::fromFile(__DIR__ . "/../resources/pngsuite/basn2c08.png") -> toIndexed() -> toGrayscale();
|
|
$this -> assertEquals(255, $img -> getMaxVal());
|
|
$this -> assertEquals(255, $img -> getPixel(0, 0)); // White
|
|
$this -> assertEquals(0, $img -> getPixel(31, 31)); // Black
|
|
}
|
|
|
|
public function testQuantizeRgb() {
|
|
// Reduce depth of image with more than 16 colors.
|
|
$img = Image::fromFile(__DIR__ . "/../resources/pngsuite/basn2c08.png") -> toIndexed();
|
|
$this -> assertEquals(16777215, $img -> getMaxVal());
|
|
$img -> setMaxVal(255);
|
|
// Check new range.
|
|
$this -> assertEquals(255, $img -> getMaxVal());
|
|
$this -> assertEquals(255, $img -> getPixel(0, 0)); // White
|
|
$this -> assertEquals(0, $img -> getPixel(31, 31)); // Black
|
|
}
|
|
}
|
|
|