Subir Imagen

[elfran222]

Continuación class.upload.php

Código:

                // we now do all the image manipulations
                $this->log .= '- image resizing or conversion wanted<br />';
                if ($this->gdversion()) {
                    switch($this->image_src_type) {
                        case 'jpg':
                            if (!function_exists('imagecreatefromjpeg')) {
                                $this->processed = false;
                                $this->error = $this->translate('no_create_support', array('JPEG'));
                            } else {
                                $image_src = @imagecreatefromjpeg($this->file_src_pathname);
                                if (!$image_src) {
                                    $this->processed = false;
                                    $this->error = $this->translate('create_error', array('JPEG'));
                                } else {
                                    $this->log .= '- source image is JPEG<br />';
                                }
                            }
                            break;
                        case 'png':
                            if (!function_exists('imagecreatefrompng')) {
                                $this->processed = false;
                                $this->error = $this->translate('no_create_support', array('PNG'));
                            } else {
                                $image_src = @imagecreatefrompng($this->file_src_pathname);
                                if (!$image_src) {
                                    $this->processed = false;
                                    $this->error = $this->translate('create_error', array('PNG'));
                                } else {
                                    $this->log .= '- source image is PNG<br />';
                                }
                            }
                            break;
                        case 'gif':
                            if (!function_exists('imagecreatefromgif')) {
                                $this->processed = false;
                                $this->error = $this->translate('no_create_support', array('GIF'));
                            } else {
                                $image_src = @imagecreatefromgif($this->file_src_pathname);
                                if (!$image_src) {
                                    $this->processed = false;
                                    $this->error = $this->translate('create_error', array('GIF'));
                                } else {
                                    $this->log .= '- source image is GIF<br />';
                                }
                            }
                            break;
                        case 'bmp':
                            if (!method_exists($this, 'imagecreatefrombmp')) {
                                $this->processed = false;
                                $this->error = $this->translate('no_create_support', array('BMP'));
                            } else {
                                $image_src = @$this->imagecreatefrombmp($this->file_src_pathname);
                                if (!$image_src) {
                                    $this->processed = false;
                                    $this->error = $this->translate('create_error', array('BMP'));
                                } else {
                                    $this->log .= '- source image is BMP<br />';
                                }
                            }
                            break;
                        default:
                            $this->processed = false;
                            $this->error = $this->translate('source_invalid');
                    }
                } else {
                    $this->processed = false;
                    $this->error = $this->translate('gd_missing');
                }

                if ($this->processed && $image_src) {

                    // we have to set image_convert if it is not already
                    if (empty($this->image_convert)) {
                        $this->log .= '- setting destination file type to ' . $this->file_src_name_ext . '<br />';
                        $this->image_convert = $this->file_src_name_ext;
                    }

                    if (!in_array($this->image_convert, $this->image_supported)) {
                        $this->image_convert = 'jpg';
                    }
                    
                    // we set the default color to be the background color if we don't output in a transparent format
                    if ($this->image_convert != 'png' && $this->image_convert != 'gif' && !empty($this->image_default_color) && empty($this->image_background_color)) $this->image_background_color = $this->image_default_color;
                    if (!empty($this->image_background_color)) $this->image_default_color = $this->image_background_color;
                    if (empty($this->image_default_color)) $this->image_default_color = '#FFFFFF';
                    
                    $this->image_src_x = imagesx($image_src);
                    $this->image_src_y = imagesy($image_src);                  
                    $this->image_dst_x = $this->image_src_x;
                    $this->image_dst_y = $this->image_src_y;
                    $gd_version = $this->gdversion();
                    $ratio_crop = null;

                    if (!imageistruecolor($image_src)) {  // $this->image_src_type == 'gif'
                        $this->log .= '- image is detected as having a palette<br />';
                        $this->image_is_palette = true;
                        $this->image_transparent_color = imagecolortransparent($image_src);
                        if ($this->image_transparent_color >= 0 && imagecolorstotal($image_src) > $this->image_transparent_color) {
                            $this->image_is_transparent = true;
                            //$this->image_transparent_color = imagecolorsforindex($image_src, $this->image_transparent_color);
                            $this->log .= '&nbsp;&nbsp;&nbsp;&nbsp;palette image is detected as transparent<br />';
                        } 
                        // if the image has a palette (GIF), we convert it to true color, preserving transparency
                        $this->log .= '&nbsp;&nbsp;&nbsp;&nbsp;convert palette image to true color<br />';
                        $transparent_color = imagecolortransparent($image_src);
                        if ($transparent_color >= 0 && imagecolorstotal($image_src) > $transparent_color) {
                            $rgb = imagecolorsforindex($image_src, $transparent_color);
                            $transparent_color = ($rgb['red'] << 16) | ($rgb['green'] << 8) | $rgb['blue'];
                            imagecolortransparent($image_src, imagecolorallocate($image_src, 0, 0, 0));
                        }
                        $true_color = imagecreatetruecolor($this->image_src_x, $this->image_src_y);
                        imagealphablending($image_src, false);
                        imagesavealpha($image_src, true);
                        imagecopy($true_color, $image_src, 0, 0, 0, 0, $this->image_src_x, $this->image_src_y);
                        $image_src = $this->imagetransfer($true_color, $image_src);
                        if ($transparent_color >= 0) {
                            $this->log .= '&nbsp;&nbsp;&nbsp;&nbsp;preserve transparency<br />';
                            imagealphablending($image_src, false);
                            imagesavealpha($image_src, true);
                            for ($x = 0; $x < $this->image_src_x; $x++) {
                                for ($y = 0; $y < $this->image_src_y; $y++) {
                                    if (imagecolorat($image_src, $x, $y) == $transparent_color) imagesetpixel($image_src, $x, $y, 127 << 24);
                                }
                            }
                        }
                        $this->image_is_palette = false;
                    }