Rounded corners about canvas2

[eduardo-k]

Davi, adaptei a função do link acima com a classe. Segue abaixo:

//$borda = caminho da imagem da borda
public function arredonda($borda, $radius = 20, $angle = 0, $topleft = true, $bottomleft = true, $bottomright = true, $topright = true)   {     
        $corner_source = imagecreatefrompng($borda);
        $corner_width = imagesx($corner_source);  
        $corner_height = imagesy($corner_source);  
        $corner_resized = ImageCreateTrueColor($radius, $radius);
        ImageCopyResampled($corner_resized, $corner_source, 0, 0, 0, 0, $radius, $radius, $corner_width, $corner_height);
        $corner_width = imagesx($corner_resized);   
        $corner_height = imagesy($corner_resized);  

        $this->img_temp = imagecreatetruecolor($corner_width, $corner_height);
        $this->img_temp = $this->img;
        $white = ImageColorAllocate($this->img_temp, 255, 255, 255);
        $black = ImageColorAllocate($this->img_temp, 0, 0, 0);

        // Top-left corner
        if ($topleft == true) {
            $dest_x = 0;  
            $dest_y = 0;  
            imagecolortransparent($corner_resized, $black); 
            imagecopymerge($this->img_temp, $corner_resized, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);
        } 

        // Bottom-left corner
        if ($bottomleft == true) {
            $dest_x = 0;  
            $dest_y = $this->altura - $corner_height; 
            $rotated = imagerotate($corner_resized, 90, 0);
            imagecolortransparent($rotated, $black); 
            imagecopymerge($this->img_temp, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);  
        }

        // Bottom-right corner
        if ($bottomright == true) {
            $dest_x = $this->largura - $corner_width;  
            $dest_y = $this->altura - $corner_height;  
            $rotated = imagerotate($corner_resized, 180, 0);
            imagecolortransparent($rotated, $black); 
            imagecopymerge($this->img_temp, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);  
        }

        // Top-right corner
        if ($topright == true) {
            $dest_x = $this->largura - $corner_width;  
            $dest_y = 0;  
            $rotated = imagerotate($corner_resized, 270, 0);
            imagecolortransparent($rotated, $black); 
            imagecopymerge($this->img_temp, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);  
        }

        // Rotate image
        $this->img = imagerotate($this->img_temp, $angle, $white);
        imagedestroy($corner_source);                  
        return $this;
     }  

[eduardo-k]

Achei um script que deu um resultado melhor:
fonte: http://911-need-code-help.blogspot.com/2009/05/generate-images-with-round-corners-on.html

     public function arredonda($radius = 10, $colour = "FFFFFF")
     {     
        /* http://911-need-code-help.blogspot.com/2009/05/generate-images-with-round-corners-on.html 
        * radius: corner radius in pixels -- default value is 10
        * colour: corner colour in rgb hex format -- default value is FFFFFF  */

        /* create mask for top-left corner in memory */
        $corner_image = imagecreatetruecolor($radius, $radius);
        $clear_colour = imagecolorallocate($corner_image, 0, 0, 0);
        $solid_colour = imagecolorallocate($corner_image, hexdec(substr($colour, 0, 2)), hexdec(substr($colour, 2, 2)), hexdec(substr($colour, 4, 2)));
        imagecolortransparent($corner_image, $clear_colour);
        imagefill($corner_image, 0, 0, $solid_colour);
        imagefilledellipse($corner_image, $radius, $radius, $radius * 2, $radius * 2, $clear_colour);

        /* render the top-left, bottom-left, bottom-right, top-right corners by rotating and copying the mask */
        $this->img_temp = $this->img;
        imagecopymerge($this->img_temp, $corner_image, 0, 0, 0, 0, $radius, $radius, 100);
        $corner_image = imagerotate($corner_image, 90, 0);
        imagecopymerge($this->img_temp, $corner_image, 0, $this->altura - $radius, 0, 0, $radius, $radius, 100);
        $corner_image = imagerotate($corner_image, 90, 0);
        imagecopymerge($this->img_temp, $corner_image, $this->largura - $radius, $this->altura - $radius, 0, 0, $radius, $radius, 100);
        $corner_image = imagerotate($corner_image, 90, 0);
        imagecopymerge($this->img_temp, $corner_image, $this->largura - $radius, 0, 0, 0, $radius, $radius, 100);

        /* output the image -- revise this step according to your needs */
        $this->img = $this->img_temp;
        return $this;
     }  

[daviferreira]

Fala Edu, tem como escrever testes, padronizar o nome em inglês e fazer um pull request?

Valeu!