Make tests a little more resilient

PNG allows identical images to be stored differently what makes nearly all
tests checking the MD5 hash of the PNG representation fail with external
libgd. For now, we use the GD format instead, which doesn't allow for such
differences.

Of course, this md5() checking should be replaced by a image diffing feature
in the long run.

ext/gd/tests/bug22544.phpt

@@ -15,9 +15,9 @@ Bug #22544 (TrueColor transparency in PNG images).
 	$red = imageColorAllocate($image, 255, 50, 50);
 	imageColorTransparent($image, $transparent);
 	imageFilledRectangle($image, 0, 0, 640-1, 100-1, $transparent);
-	imagePng($image, $dest);
+	imagegd($image, $dest);
 	echo md5_file($dest) . "\n";
 	@unlink($dest);
 ?>
 --EXPECT--
-10a57d09a2c63fad87b85b38d6b258d6
+7643ef115f642a79c2de6e411f485ddd

ext/gd/tests/bug43828.phpt

@@ -15,9 +15,9 @@ $color = imagecolorallocatealpha($im, 0, 255, 0, 100);
 imagefilledarc($im, 49, 49, 99,99, 0 , 360, $color, IMG_ARC_PIE);
 
 ob_start();
-imagepng($im);
+imagegd($im);
 echo md5(ob_get_clean());
 imagedestroy($im);
 ?>
 --EXPECT--
-3d82e4525f19790ae1055366e2a36917
+2400a58cd7570b5472c25264715321cd

ext/gd/tests/bug72604.phpt

@@ -11,9 +11,9 @@ $im = imagecreatetruecolor(100, 100);
 imagesetthickness($im, 5);
 imagearc($im, 50, 50, 90, 90, 0, 360, 0xffffff);
 ob_start();
-imagepng($im);
+imagegd($im);
 $imagestring = ob_get_clean();
 echo md5($imagestring);
 ?>
 --EXPECT--
-2ffa6afb915afbdf870cf6459477bc8a
+4f5080080a774efe4fc8d55cd4a5849c

ext/gd/tests/imagearc_basic.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagearc($image, 50, 50, 30, 30, 0, 180, $white);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-f18ad8001afefee2e9b8c08d6884425b
+13149c3fd54a92a0d43cd5083a19b1d7

ext/gd/tests/imagearc_error1.phpt

@@ -18,7 +18,7 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagearc($image, 50, 50, 30, 30, 0, 180);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
@@ -26,4 +26,4 @@ echo md5(base64_encode($img));
 ?>
 --EXPECTF--
 Warning: imagearc() expects exactly 8 parameters, 7 given in %s on line %d
-abebb25b5a2813cfbf92f1f24365786a
+c5b7013900f5466aebfc42499a7ec8ec

ext/gd/tests/imagearc_variation1.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagearc($image, 50, 50, 30, 30, 0, -90, $white);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-ed2c8427a9922dfd8a105f10a88a0d20
+fe662ebe7488057c43e38c5de43b1727

ext/gd/tests/imagearc_variation2.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagearc($image, 50, 50, 30, 30, -90, 0, $white);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-463b4aea9d9acfab30016ee92613c779
+8bd78aa775b5f29e7227eaeebaa84889

ext/gd/tests/imagechar_basic.phpt

@@ -15,11 +15,11 @@ $white = imagecolorallocate($image, 255,255,255);
 $result = imagechar($image, 1, 5, 5, 'C', $white);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-e94962ac28ad03bd4142cb1abe9ef98b
+f0291252e7ac2fadda25e63287e6860c

ext/gd/tests/imagecharup_basic.phpt

@@ -15,11 +15,11 @@ $white = imagecolorallocate($image, 255,255,255);
 $result = imagecharup($image, 1, 5, 5, 'C', $white);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-79b48d5cef6d489bb68573df0296d775
+c65aad5d78f934dee2a844e7978eabd5

ext/gd/tests/imagecolorallocatealpha_basic.phpt

@@ -18,7 +18,7 @@ $half =  imagefilledarc ( $img, 75, 75, 70, 70, 0, 180, $cor, IMG_ARC_PIE );
 $half2 =  imagefilledarc ( $img, 75, 75, 70, 70, 180, 360, $corA, IMG_ARC_PIE );
 
 ob_start();
-imagepng($img, null, 9);
+imagegd($img);
 $imgsrc = ob_get_contents();
 ob_end_clean();
 
@@ -26,5 +26,5 @@ var_dump(md5(base64_encode($imgsrc)));
 var_dump($corA);
 ?>
 --EXPECT--
-string(32) "f95489d97f4f1a5c4dc265388922d1ec"
+string(32) "0981ef94ee2209a8dccb59aa8ad07e18"
 int(842163455)

ext/gd/tests/imagecolorset_basic.phpt

@@ -25,11 +25,11 @@ imagecolorset($im, $bg, 0, 0, 255);
 
 // Get output and generate md5 hash
 ob_start();
-imagepng($im, null, 9);
+imagegd($im);
 $result_image = ob_get_contents();
 ob_end_clean();
 echo md5(base64_encode($result_image));
 imagedestroy($im);
 ?>
 --EXPECT--
-6f2002aafb57b2d275fad6a6258d7476
+85e406abd0a975c97b3403cad5d078c9

ext/gd/tests/imageconvolution_basic.phpt

@@ -23,11 +23,11 @@ $gaussian = array(
 imageconvolution($image, $gaussian, 16, 0);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-594576a2a2a689447ffc07eb5a73f09b
+20979b45f8772cdbd78262af4e332638

ext/gd/tests/imagecreatetruecolor_basic.phpt

@@ -12,11 +12,11 @@ Rafael Dohms <rdohms [at] gmail [dot] com>
 $image = imagecreatetruecolor(180, 30);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-5a8fe9864cbd20e5dbe730c77f30db95
+da884f488a851e0267a316ad232aee86

ext/gd/tests/imageellipse_basic.phpt

@@ -17,11 +17,11 @@ $image = imagecreatetruecolor(400, 300);
 imageellipse($image, 200, 150, 300, 200, 16777215);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-d8b9bc2ca224bd68569413f4617f8e1f
+49c1544b012c3460c74cd04f1332d4ad

ext/gd/tests/imagefilledarc_basic.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagefilledarc($image, 50, 50, 30, 30, 0, 90, $white, IMG_ARC_PIE);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-beffeaf5231adaaff1f21a2108fb6f7e
+87637c60ac0ceea48dbcaa4d98319f90

ext/gd/tests/imagefilledarc_error1.phpt

@@ -18,7 +18,7 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagefilledarc($image, 50, 50, 30, 30, 0, 90, $white);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
@@ -26,4 +26,4 @@ echo md5(base64_encode($img));
 ?>
 --EXPECTF--
 Warning: imagefilledarc() expects exactly 9 parameters, 8 given in %s on line %d
-abebb25b5a2813cfbf92f1f24365786a
+c5b7013900f5466aebfc42499a7ec8ec

ext/gd/tests/imagefilledarc_variation1.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagefilledarc($image, 50, 50, 30, 30, 0, -25, $white, IMG_ARC_PIE);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-b467492b806001c3720b3f18cfbde5b0
+f25f589b5c5fa7deead7242652919bcf

ext/gd/tests/imagefilledarc_variation2.phpt

@@ -18,11 +18,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagefilledarc($image, 50, 50, 30, 30, -25, 25, $white, IMG_ARC_PIE);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-cfad369fc6d863785d3c95b4b4788225
+43c2973eb4872903eb6f5464c7965a93

ext/gd/tests/imagefilledellipse_basic.phpt

@@ -15,11 +15,11 @@ $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
 imagefilledellipse($image, 50, 50, 40, 30, $white);
 
 ob_start();
-imagepng($image);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-9ba540bba1b78c9f08efaa6fa0afd93b
+233beffe003a41d3c9e788039e3191dd

ext/gd/tests/imagefilltoborder_basic.phpt

@@ -22,7 +22,7 @@ imageellipse( $image, 50, 50, 50, 50, imagecolorallocate( $image, 0, 0, 0 ) );
 imagefilltoborder( $image, 50, 50, imagecolorallocate( $image, 0, 0, 0 ), imagecolorallocate( $image, 255, 0, 0 ) );
 
 ob_start(); 
-imagepng( $image, null, 9 ); 
+imagegd( $image);
 $img = ob_get_contents(); 
 ob_end_clean();
 
@@ -30,4 +30,4 @@ echo md5(base64_encode($img));
 
 ?> 
 --EXPECT-- 
-847ec236f1c4d14c465306c8408550fc
+8185a06ccff03c2abeb99d5e3ed60e45

ext/gd/tests/imagegammacorrect_basic.phpt

@@ -21,7 +21,7 @@ $gamma = imagegammacorrect($image, 1, 5);
 
 if ($gamma){
 	ob_start();
-	imagepng($image, null, 9);
+	imagegd($image);
 	$img = ob_get_contents();
 	ob_end_clean();
 }
@@ -29,4 +29,4 @@ if ($gamma){
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-e79553115df689ea5df18a4636380569
+1f625723f9d27251a1f15b83a6a4bf55

ext/gd/tests/imagegammacorrect_variation1.phpt

@@ -21,7 +21,7 @@ $gamma = imagegammacorrect($image, 1, 5);
 
 if ($gamma){
 	ob_start();
-	imagepng($image, null, 9);
+	imagegd($image);
 	$img = ob_get_contents();
 	ob_end_clean();
 }
@@ -29,4 +29,4 @@ if ($gamma){
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-b017b1ddc8bda00e82aa8cbfb54c35d4
+32fdb7b3675e4a9fd601c6a0645c88b3

ext/gd/tests/imagelayereffect_basic.phpt

@@ -16,7 +16,7 @@ $layer = imagelayereffect($image, IMG_EFFECT_REPLACE);
 
 if ($layer){
 	ob_start();
-	imagepng($image, null, 9);
+	imagegd($image);
 	$img = ob_get_contents();
 	ob_end_clean();
 }
@@ -24,4 +24,4 @@ if ($layer){
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-5a8fe9864cbd20e5dbe730c77f30db95
+da884f488a851e0267a316ad232aee86

ext/gd/tests/imagerectangle_basic.phpt

@@ -16,7 +16,7 @@ $image = imagecreatetruecolor( 100, 100 );
 imagerectangle( $image, 0, 0, 50, 50, imagecolorallocate($image, 255, 255, 255) );
 
 ob_start(); 
-imagepng( $image, null, 9 ); 
+imagegd( $image );
 $img = ob_get_contents(); 
 ob_end_clean();
 
@@ -24,4 +24,4 @@ echo md5(base64_encode($img));
 
 ?> 
 --EXPECT-- 
-282aaecfdd50091821d63093d9bb1bb9
+e7f8ca8c63fb08b248f3ed6435983aed

ext/gd/tests/imagesetbrush_basic.phpt

@@ -28,10 +28,10 @@ imageline($mainimg, 50, 50, 50, 60, IMG_COLOR_BRUSHED);
 
 // Get output and generate md5 hash
 ob_start();
-imagepng($mainimg, null, 9);
+imagegd($mainimg);
 $result_image = ob_get_contents();
 ob_end_clean();
 echo md5(base64_encode($result_image));
 ?>
 --EXPECT--
-8168577c0d1fe6d9d11397cb15263d82
+2bb294c388d826cc9bba6c6fd31f265a

ext/gd/tests/imagesetthickness_basic.phpt

@@ -24,11 +24,11 @@ imagesetthickness($image, 5);
 imagerectangle($image, 14, 14, 185, 85, $black);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-93c3077f1bdc372cd0b0db96db282985
+1a6bc882772310d2e9b32cca2574236c

ext/gd/tests/imagestring_basic.phpt

@@ -15,11 +15,11 @@ $white = imagecolorallocate($image, 255,255,255);
 $result = imagestring($image, 1, 5, 5, 'String Text', $white);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-d0d2fe757400cb7846b36a8c34b41e4a
+7f146e3cdcaf89c6b9d68ccbb44cf94e

ext/gd/tests/imagestringup_basic.phpt

@@ -15,11 +15,11 @@ $white = imagecolorallocate($image, 255,255,255);
 $result = imagestringup($image, 1, 5, 25, 'Str', $white);
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
 echo md5(base64_encode($img));
 ?>
 --EXPECT--
-7c28016adcf620b772af2a8655b87bd2
+7c55836800702bdd43b4c25d8ebcfcd0

ext/gd/tests/imagetruecolortopalette_basic.phpt

@@ -20,7 +20,7 @@ $half2 =  imagefilledarc ( $image, 75, 55, 80, 70, 0, -180, $b, IMG_ARC_PIE );
 var_dump(imagetruecolortopalette($image, true, 2));
 
 ob_start();
-imagepng($image, null, 9);
+imagegd($image);
 $img = ob_get_contents();
 ob_end_clean();
 
@@ -28,4 +28,4 @@ echo md5(base64_encode($img));
 ?>
 --EXPECT--
 bool(true)
-1d41787ff70aa0c7eea5ee9304afa36b
+17c901cb2217eb7647deed1c79d445de

ext/gd/tests/libgd00100.phpt

@@ -107,7 +107,7 @@ $points = array(
 imagefilledpolygon($im, $points, 5, $black);
 
 ob_start();
-imagepng($im);
+imagegd($im);
 $png = ob_get_contents();
 ob_end_clean();
 
@@ -116,4 +116,4 @@ echo md5($png);
 imagedestroy($im);
 ?>
 --EXPECTF--
-2e6cf558bb4dadf60c8b608d5f8cda4e
+df7253c765280396f303166f10ba9283