defined('MOODLE_INTERNAL') || die();
/**
+ * Copies a rectangular portion of the source image to another rectangle in the destination image
*
- * long description
- * @global object
- * @param object $dst_img
- * @param object $src_img
- * @param int $dst_x
- * @param int $dst_y
- * @param int $src_x
- * @param int $src_y
- * @param int $dst_w
- * @param int $dst_h
- * @param int $src_w
- * @param int $src_h
- * @return bool
- * @todo Finish documenting this function
+ * This function calls imagecopyresampled() if it is available and GD version is 2 at least.
+ * Otherwise it reimplements the same behaviour. See the PHP manual page for more info.
+ *
+ * @link http://php.net/manual/en/function.imagecopyresampled.php
+ * @param resource $dst_img the destination GD image resource
+ * @param resource $src_img the source GD image resource
+ * @param int $dst_x vthe X coordinate of the upper left corner in the destination image
+ * @param int $dst_y the Y coordinate of the upper left corner in the destination image
+ * @param int $src_x the X coordinate of the upper left corner in the source image
+ * @param int $src_y the Y coordinate of the upper left corner in the source image
+ * @param int $dst_w the width of the destination rectangle
+ * @param int $dst_h the height of the destination rectangle
+ * @param int $src_w the width of the source rectangle
+ * @param int $src_h the height of the source rectangle
+ * @return bool tru on success, false otherwise
*/
-function ImageCopyBicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
-
+function imagecopybicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
global $CFG;
- if (function_exists('ImageCopyResampled') and $CFG->gdversion >= 2) {
- return ImageCopyResampled($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y,
+ if (function_exists('imagecopyresampled') and $CFG->gdversion >= 2) {
+ return imagecopyresampled($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y,
$dst_w, $dst_h, $src_w, $src_h);
}
$totalcolors = imagecolorstotal($src_img);
for ($i=0; $i<$totalcolors; $i++) {
- if ($colors = ImageColorsForIndex($src_img, $i)) {
- ImageColorAllocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
+ if ($colors = imagecolorsforindex($src_img, $i)) {
+ imagecolorallocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
}
}
- $scaleX = ($src_w - 1) / $dst_w;
- $scaleY = ($src_h - 1) / $dst_h;
+ $scalex = ($src_w - 1) / $dst_w;
+ $scaley = ($src_h - 1) / $dst_h;
- $scaleX2 = $scaleX / 2.0;
- $scaleY2 = $scaleY / 2.0;
+ $scalex2 = $scalex / 2.0;
+ $scaley2 = $scaley / 2.0;
for ($j = 0; $j < $dst_h; $j++) {
- $sY = $j * $scaleY;
+ $sy = $j * $scaley;
for ($i = 0; $i < $dst_w; $i++) {
- $sX = $i * $scaleX;
+ $sx = $i * $scalex;
- $c1 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY+$scaleY2));
- $c2 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY));
- $c3 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY+$scaleY2));
- $c4 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY));
+ $c1 = imagecolorsforindex($src_img, imagecolorat($src_img, (int)$sx, (int)$sy + $scaley2));
+ $c2 = imagecolorsforindex($src_img, imagecolorat($src_img, (int)$sx, (int)$sy));
+ $c3 = imagecolorsforindex($src_img, imagecolorat($src_img, (int)$sx + $scalex2, (int)$sy + $scaley2));
+ $c4 = imagecolorsforindex($src_img, imagecolorat($src_img, (int)$sx + $scalex2, (int)$sy));
$red = (int) (($c1['red'] + $c2['red'] + $c3['red'] + $c4['red']) / 4);
$green = (int) (($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) / 4);
$blue = (int) (($c1['blue'] + $c2['blue'] + $c3['blue'] + $c4['blue']) / 4);
- $color = ImageColorClosest ($dst_img, $red, $green, $blue);
- ImageSetPixel ($dst_img, $i + $dst_x, $j + $dst_y, $color);
+ $color = imagecolorclosest($dst_img, $red, $green, $blue);
+ imagesetpixel($dst_img, $i + $dst_x, $j + $dst_y, $color);
}
}
}
return false;
}
- $imageinfo = GetImageSize($originalfile);
+ $imageinfo = getimagesize($originalfile);
if (empty($imageinfo)) {
return false;
switch ($image->type) {
case IMAGETYPE_GIF:
- if (function_exists('ImageCreateFromGIF')) {
- $im = ImageCreateFromGIF($originalfile);
+ if (function_exists('imagecreatefromgif')) {
+ $im = imagecreatefromgif($originalfile);
} else {
debugging('GIF not supported on this server');
return false;
}
break;
case IMAGETYPE_JPEG:
- if (function_exists('ImageCreateFromJPEG')) {
- $im = ImageCreateFromJPEG($originalfile);
+ if (function_exists('imagecreatefromjpeg')) {
+ $im = imagecreatefromjpeg($originalfile);
} else {
debugging('JPEG not supported on this server');
return false;
}
break;
case IMAGETYPE_PNG:
- if (function_exists('ImageCreateFromPNG')) {
- $im = ImageCreateFromPNG($originalfile);
+ if (function_exists('imagecreatefrompng')) {
+ $im = imagecreatefrompng($originalfile);
} else {
debugging('PNG not supported on this server');
return false;
return false;
}
- if (function_exists('ImagePng')) {
- $imagefnc = 'ImagePng';
+ if (function_exists('imagepng')) {
+ $imagefnc = 'imagepng';
$imageext = '.png';
$filters = PNG_NO_FILTER;
$quality = 1;
- } else if (function_exists('ImageJpeg')) {
- $imagefnc = 'ImageJpeg';
+ } else if (function_exists('imagejpeg')) {
+ $imagefnc = 'imagejpeg';
$imageext = '.jpg';
$filters = null; // not used
$quality = 90;
return false;
}
- if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
- $im1 = ImageCreateTrueColor(100,100);
- $im2 = ImageCreateTrueColor(35,35);
- if ($image->type == IMAGETYPE_PNG and $imagefnc === 'ImagePng') {
+ if (function_exists('imagecreatetruecolor') and $CFG->gdversion >= 2) {
+ $im1 = imagecreatetruecolor(100, 100);
+ $im2 = imagecreatetruecolor(35, 35);
+ if ($image->type == IMAGETYPE_PNG and $imagefnc === 'imagepng') {
imagealphablending($im1, false);
$color = imagecolorallocatealpha($im1, 0, 0, 0, 127);
imagefill($im1, 0, 0, $color);
imagesavealpha($im2, true);
}
} else {
- $im1 = ImageCreate(100,100);
- $im2 = ImageCreate(35,35);
+ $im1 = imagecreate(100, 100);
+ $im2 = imagecreate(35, 35);
}
$cx = $image->width / 2;
$half = floor($image->height / 2.0);
}
- ImageCopyBicubic($im1, $im, 0, 0, $cx-$half, $cy-$half, 100, 100, $half*2, $half*2);
- ImageCopyBicubic($im2, $im, 0, 0, $cx-$half, $cy-$half, 35, 35, $half*2, $half*2);
+ imagecopybicubic($im1, $im, 0, 0, $cx - $half, $cy - $half, 100, 100, $half * 2, $half * 2);
+ imagecopybicubic($im2, $im, 0, 0, $cx - $half, $cy - $half, 35, 35, $half * 2, $half * 2);
$fs = get_file_storage();
return false;
}
$data = ob_get_clean();
- ImageDestroy($im1);
+ imagedestroy($im1);
$icon['filename'] = 'f1'.$imageext;
$fs->delete_area_files($context->id, $component, $filearea, $itemid);
$fs->create_file_from_string($icon, $data);
return false;
}
$data = ob_get_clean();
- ImageDestroy($im2);
+ imagedestroy($im2);
$icon['filename'] = 'f2'.$imageext;
$fs->create_file_from_string($icon, $data);