protected function create_images($text, $hash)
{
// Check parameters.
if (trim($text) === '') {
return array();
}
if (!mb_check_encoding($text, 'UTF-8')) {
throw new IMGTextException('String is not valid UTF-8');
}
$font_filename = $this->font_dir . '/' . $this->font_name . '.' . $this->font_ext;
if (!file_exists($font_filename)) {
throw new IMGTextException('Font not found: ' . $font);
}
$font_size = (int) $this->font_size;
if ($font_size <= 0) {
throw new IMGTextException('Invalid font size: ' . $size);
}
if (!preg_match('/^#?(?:[0-9a-f]{3})(?:[0-9a-f]{3})?$/', $this->color)) {
throw new IMGTextException('Invalid text color: ' . $this->color);
}
if ($this->background_color !== false && !preg_match('/^#?(?:[0-9a-f]{3})(?:[0-9a-f]{3})?$/', $this->background_color)) {
throw new IMGTextException('Invalid background color: ' . $this->background_color);
}
if (!is_array($this->padding) || count($this->padding) != 4) {
throw new IMGTextException('Invalid padding. Please use array with 4 members.');
}
if (!is_array($this->shadow_offset) || count($this->shadow_offset) != 2) {
throw new IMGTextException('Invalid shadow offset. Please use array with 2 members.');
}
if ($this->shadow_opacity < 0 || $this->shadow_opacity > 127) {
throw new IMGTextException('Invalid shadow opacity. Please use a value between 0 (opaque) and 127 (transparent).');
}
// Split the text into words.
$words = preg_split('/\\s+/u', $text);
// Parse the padding amount.
$padding_top = intval($this->padding[0]);
$padding_right = intval($this->padding[1]);
$padding_bottom = intval($this->padding[2]);
$padding_left = intval($this->padding[3]);
// Get size information for each word. We do this first, in order to find out the maximum height.
$fragments = array();
$max_height = 0;
$max_top = 0;
foreach ($words as $w) {
$w = trim($w);
if ($w === '') {
continue;
}
// Get the bounding box size.
$bounds = imageTTFBBox($font_size, 0, $font_filename, $w);
// Get more useful information from GD's return values.
$width = $bounds[2] - $bounds[0];
$height = $bounds[3] - $bounds[5];
$left = -$bounds[6] - 1;
$top = -$bounds[7] - 1;
// Update the max height/top values if necessary.
if ($height > $max_height) {
$max_height = $height;
}
if ($top > $max_top) {
$max_top = $top;
}
$fragments[] = array($w, $width, $height, $left, $top);
}
// Create images for each word.
$count = 1;
$return = array();
foreach ($fragments as $f) {
list($w, $width, $height, $left, $top) = $f;
$img_width = $width + $padding_left + $padding_right;
$img_height = $this->image_height ? $this->image_height : $max_height + $padding_top + $padding_bottom;
$text_left = $left + $padding_left;
$text_top = $max_top + $padding_top;
// Adjust image size and text location if there's a shadow.
if ($this->shadow) {
if ($this->shadow_offset[0] < 0) {
$shadow_space_left = $this->shadow_blur - $this->shadow_offset[0];
$shadow_space_right = max(0, $this->shadow_blur + abs($this->shadow_offset[0]));
$shadow_left = $text_left + $shadow_space_left;
$text_left = $text_left + $shadow_space_left - $this->shadow_offset[0];
} else {
$shadow_space_left = max(0, $this->shadow_blur - $this->shadow_offset[0]);
$shadow_space_right = $this->shadow_blur + $this->shadow_offset[0];
$shadow_left = $text_left + $shadow_space_left + $this->shadow_offset[0];
$text_left = $text_left + $shadow_space_left;
}
if ($this->shadow_offset[1] < 0) {
$shadow_space_top = $this->shadow_blur - $this->shadow_offset[1];
$shadow_space_bottom = max(0, $this->shadow_blur + abs($this->shadow_offset[1]));
$shadow_top = $text_top + $shadow_space_top;
$text_top = $text_top + $shadow_space_top - $this->shadow_offset[1];
} else {
$shadow_space_top = max(0, $this->shadow_blur - $this->shadow_offset[1]);
$shadow_space_bottom = $this->shadow_blur + $this->shadow_offset[1];
$shadow_top = $text_top + $shadow_space_top + $this->shadow_offset[1];
$text_top = $text_top + $shadow_space_top;
}
$img_width += $shadow_space_left + $shadow_space_right;
$img_height += $shadow_space_top + $shadow_space_bottom;
}
// Initialize the image and draw the background.
$img = imageCreateTrueColor($img_width, $img_height);
if ($this->background_color === false) {
imageSaveAlpha($img, true);
imageAlphaBlending($img, false);
$img_background_color = imageColorAllocateAlpha($img, 255, 255, 255, 127);
imageFilledRectangle($img, 0, 0, $img_width, $img_height, $img_background_color);
imageAlphaBlending($img, true);
} else {
$img_background_colors = $this->hex2rgb($this->background_color);
$img_background_color = imageColorAllocate($img, $img_background_colors[0], $img_background_colors[1], $img_background_colors[2]);
imageFilledRectangle($img, 0, 0, $img_width, $img_height, $img_background_color);
}
// Draw the shadow.
if ($this->shadow) {
// Blurred shadow on a transparent background needs special treatment because of GD's limitations.
if ($this->shadow_blur && $this->background_color === false) {
// Create a temporary image for the shadow.
$temp = imageCreateTrueColor($img_width, $img_height);
imageSaveAlpha($temp, true);
imageFilledRectangle($temp, 0, 0, $img_width, $img_height, imageColorAllocate($temp, 127, 127, 127));
// Draw the shadow text on the temporary image, and blur it.
$temp_text_color = imageColorAllocate($temp, $this->shadow_opacity, $this->shadow_opacity, $this->shadow_opacity);
imageTTFText($temp, $font_size, 0, $shadow_left, $shadow_top, $temp_text_color, $font_filename, $w);
for ($i = 0; $i < $this->shadow_blur; $i++) {
imageFilter($temp, IMG_FILTER_GAUSSIAN_BLUR);
}
// Use the blurred shadow as an alpha mask on the original image.
$shadow_colors = $this->hex2rgb($this->shadow_color);
for ($x = 0; $x < $img_width; $x++) {
for ($y = 0; $y < $img_height; $y++) {
$alpha = imageColorAt($temp, $x, $y) & 0xff;
imageSetPixel($img, $x, $y, imageColorAllocateAlpha($img, $shadow_colors[0], $shadow_colors[1], $shadow_colors[2], $alpha));
}
}
imageDestroy($temp);
} else {
$shadow_colors = $this->hex2rgb($this->shadow_color);
$shadow_color = imageColorAllocateAlpha($img, $shadow_colors[0], $shadow_colors[1], $shadow_colors[2], $this->shadow_opacity);
imageTTFText($img, $font_size, 0, $shadow_left, $shadow_top, $shadow_color, $font_filename, $w);
for ($i = 0; $i < $this->shadow_blur; $i++) {
imageFilter($img, IMG_FILTER_GAUSSIAN_BLUR);
}
}
}
// Draw the word.
$text_colors = $this->hex2rgb($this->color);
$text_color = imageColorAllocate($img, $text_colors[0], $text_colors[1], $text_colors[2]);
imageTTFText($img, $font_size, 0, $text_left, $text_top, $text_color, $font_filename, $w);
// Save to a PNG file.
$filename = '/imgtext.' . $hash . '.word-' . str_pad($count, 3, '0', STR_PAD_LEFT) . '.png';
imagePNG($img, $this->cache_local_dir . $filename);
imageDestroy($img);
// Add information about this word to the return array.
$return[] = array('word' => $w, 'path' => $this->cache_url_prefix . $filename);
$count++;
}
// Returns a list of dictionaries, each containing a word and the corresponding image URL.
return $return;
}
/**
* @param $resource
* @param $color
* @return bool
*/
public function set_part_color(&$resource, $color)
{
$replace_color = $this->HEX2RGB($color);
if (LITE_RECOLOR_FUNCTION) {
imageFilter($resource, IMG_FILTER_COLORIZE, $replace_color[0] - 255, $replace_color[1] - 255, $replace_color[2] - 255);
} else {
$width = imageSX($resource);
$height = imageSY($resource);
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < $width; $x++) {
$rgb = imageColorsForIndex($resource, imageColorAt($resource, $x, $y));
$nr = max(round($rgb['red'] * $replace_color[0] / 255), 0);
$ng = max(round($rgb['green'] * $replace_color[1] / 255), 0);
$nb = max(round($rgb['blue'] * $replace_color[2] / 255), 0);
imageSetPixel($resource, $x, $y, imageColorAllocateAlpha($resource, $nr, $ng, $nb, $rgb['alpha']));
}
}
}
return true;
}
