'; } function gd_image_chart_image($data, $path, $file_name) { // create image $width = $data['#width']; $height = $data['#height']; $image = imagecreate($width, $height); // colors $background_color_html = empty($data['#color']['background']) ? '#FFFFFF' : $data['#color']['background']; $background_color_rgb = _gd_image_chart_html2rgb($background_color_html); //The first color to be allocated is the background!!! $background_color = imagecolorallocate($image, $background_color_rgb[0], $background_color_rgb[1], $background_color_rgb[2]); $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); $black = imagecolorallocate($image, 0x00, 0x00, 0x00); $gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0); $text_color_html = empty($data['#color']['text']) ? '#000000' : $data['#color']['text']; $text_color_rgb = _gd_image_chart_html2rgb($text_color_html); $text_color = imagecolorallocate($image, $text_color_rgb[0], $text_color_rgb[1], $text_color_rgb[2]); // layout $maxval = 0; $nval = 0; $series_count = 0; foreach (element_children($data) as $series) { $series_data = _charts_series_values($data[$series]); $maxval = max($series_data) > $maxval ? max($series_data) : $maxval; $nval = sizeof($series_data) > $nval ? sizeof($series_data) : $nval; $series_count +=1; } if ($data['#type'] == 'vbar2D') { //For vbar2d the number of x values equals max count of series times the number of series to display $nval = $nval * $series_count; } $vmargin = 20; // top (bottom) vertical margin for title (x-labels) $hmargin = 38; // left horizontal margin for y-labels $base = floor(($width - $hmargin) / $nval); // distance between columns $ysize = $height - 2 * $vmargin; // y-size of plot $xsize = $nval * $base; // x-size of plot // title $titlefont = 3; $title = $data['#title']; $txtsz = imagefontwidth($titlefont) * drupal_strlen($title); // pixel-width of title $xpos = (int)($hmargin + ($xsize - $txtsz)/2); // center the title $xpos = max(1, $xpos); // force positive coordinates $ypos = 3; // distance from top imagestring($image, $titlefont, $xpos, $ypos, $title , $text_color); // y labels and grid lines $labelfont = 2; $ngrid = 4; // number of grid lines $dydat = $maxval / $ngrid; // data units between grid lines $dypix = $ysize / ($ngrid + 1); // pixels between grid lines for ($i = 0; $i <= ($ngrid + 1); $i++) { // iterate over y ticks // height of grid line in units of data $ydat = (int)($i * $dydat); // height of grid line in pixels $ypos = $vmargin + $ysize - (int)($i*$dypix); $txtsz = imagefontwidth($labelfont) * drupal_strlen($ydat); // pixel-width of label $txtht = imagefontheight($labelfont); // pixel-height of label $xpos = (int)(($hmargin - $txtsz) / 2); $xpos = max(1, $xpos); imagestring($image, $labelfont, $xpos, $ypos - (int)($txtht/2), $ydat, $text_color); if (!($i == 0) && !($i > $ngrid)) { // don't draw at Y=0 and top imageline($image, $hmargin - 3, $ypos, $hmargin + $xsize, $ypos, $gray); } } switch ($data['#type']) { case 'line2D': $yscale = $ysize / (($ngrid+1) * $dydat); // pixels per data unit _gd_image_chart_line2d($image, $data, $series_count, $base, $padding, $vmargin, $hmargin, $ysize, $yscale, $xsize, $labelfont, $text_color); break; case 'vbar2D': $yscale = $ysize / (($ngrid+1) * $dydat); // pixels per data unit _gd_image_chart_vbar2d($image, $data, $series_count, $base, $padding, $vmargin, $hmargin, $ysize, $yscale, $xsize, $labelfont, $text_color); break; default: return t('Type %type is not possible using %chartplugin', array('%type' => $data['#type'], '%chartplugin' => 'GD image Chart')); } // plot frame imagerectangle($image, $hmargin, $vmargin, $hmargin + $xsize, $vmargin + $ysize, $black); // write image to file system $directory = file_directory_path() ."/". $path; if (file_check_directory($directory, TRUE)) { imagepng($image, $directory ."/". $file_name); } else { drupal_set_message(t("Unable to cereate image at location: %directory/%filename", array('%directory' => $directory, '%filename' => $file_name)), TRUE); } imagedestroy($image); } function _gd_image_chart_line2d($image, $data, $series_count, $base, $padding, $vmargin, $hmargin, $ysize, $yscale, $xsize, $labelfont, $text_color) { $series_handled = 0; foreach (element_children($data) as $series) { $color_html = empty($data[$series]['#color']) ? '#000000' : $data[$series]['#color']; $color_rgb = _gd_image_chart_html2rgb($color_html); $color = imagecolorallocate($image, $color_rgb[0], $color_rgb[1], $color_rgb[2]); $series_data = _charts_series_values($data[$series]); $y0_pos = $vmargin + $ysize; $xpos_prev = FALSE; $ypos_prev = FALSE; foreach ($series_data as $xval => $yval) { $xpos = $hmargin + ($xval + 1) * $base - $padding; $ypos = $y0_pos - (int)($yval*$yscale); if ($xpos_prev && $ypos_prev) { imageline($image, $xpos_prev, $ypos_prev, $xpos, $ypos, $color); } $xpos_prev = $xpos; $ypos_prev = $ypos; // x labels if ($series_handled == 0) { //Only print labels for first series - avoid duplicates if (empty($data[$series][$xval]['#label'])) { $value_label = ''; } else { $value_label = $data[$series][$xval]['#label']; } $txtsz = imagefontwidth($labelfont) * drupal_strlen($value_label); $xpos = $xpos - ($txtsz/ 2); $ypos = $y0_pos + 3; // distance from x axis imagestring($image, $labelfont, $xpos, $ypos, $value_label, $text_color); } } $series_handled += 1; } } function _gd_image_chart_vbar2d($image, $data, $series_count, $base, $padding, $vmargin, $hmargin, $ysize, $yscale, $xsize, $labelfont, $text_color) { // columns and x labels $padding = 3; // half of spacing between columns $series_handled = 0; foreach (element_children($data) as $series) { $color_html = empty($data[$series]['#color']) ? '#000000' : $data[$series]['#color']; $color_rgb = _gd_image_chart_html2rgb($color_html); $color = imagecolorallocate($image, $color_rgb[0], $color_rgb[1], $color_rgb[2]); $series_data = _charts_series_values($data[$series]); foreach ($series_data as $xval => $yval) { // vertical columns $ymax = $vmargin + $ysize; $ymin = $ymax - (int)($yval*$yscale); $xmax = $hmargin + ($xval+1)*$base - $padding; $xmin = $hmargin + $xval*$base + $padding; $xdelta = $xmax - $xmin; $xmax += $xdelta * ($series_handled + ($series_count - 1) * $xval); $xmin += $xdelta * ($series_handled + ($series_count - 1) * $xval); imagefilledrectangle($image, $xmin, $ymin, $xmax, $ymax, $color); // x labels if ($series_handled == 0) { //Only print labels for first series - avoid duplicates if (empty($data[$series][$xval]['#label'])) { $value_label = ''; } else { $value_label = $data[$series][$xval]['#label']; } $txtsz = imagefontwidth($labelfont) * drupal_strlen($value_label); $xpos = $xmin + (int)((($xdelta * $series_count) - $txtsz)/ 2); $xpos = max($xmin, $xpos); $ypos = $ymax + 3; // distance from x axis imagestring($image, $labelfont, $xpos, $ypos, $value_label, $text_color); } } $series_handled += 1; } } function _gd_image_chart_html2rgb($color) { if ($color[0] == '#') { $color = substr($color, 1); } if (strlen($color) == 6) { list($r, $g, $b) = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5]); } elseif (strlen($color) == 3) { list($r, $g, $b) = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2]); } else { return FALSE; } $r = hexdec($r); $g = hexdec($g); $b = hexdec($b); return array($r, $g, $b); }