Round Corners and Border?
Posted: 2009-04-17T13:19:45-07:00
Hello,
About a week ago I noticed that ( and it might just be that I'm the only one experiencing this ) while working with a PNG image with transparency, if I set a border ala borderImage, the transparent areas of the PNG would suddenly become the same color as the border color. This leads me to believe that Imagick creates a larger canvas and composites the PNG onto the canvas. I was able to resolve this issue through the use of DSTOUT ( although it took quite a while to figure out ).
Anywho, a day later I decided I wanted to add rounded corners and that's when my whole world fell apart. Trying to round the corners of an image and add a rounded corner border around it while applying the fix to the transparency problem I mentioned above has proven to be one of the most difficult experiences of my life.
I've determined this much, or atleast what I believe to be 'this much' of the solution. I need to draw a roundRectangle the dimensions of the PNG image + the borders (Layer 1) which will serve as the border, then I need to copy that roundedRectangle and scale it to the size of the PNG image (Layer 2), somehow I need to DSTOUT the shape of Layer 2 onto Layer 1, get the PNG image in the shape of Layer 2 (Layer 3), and then DSTIN the Layer 3 onto Layer 1. Whew! That's a mouthful! While I've been unsuccessful in my attempts to perform exactly to the T the process I just described. I had come up with an alternative but the rounded border looks frankly like ass.
The above code pumps out the following image if I specified $this->requestImageRoundCorners() as 12 and $this->requestImageBorder() as 4.
Hence the reason why I decided that I need to copy and scale the initial roundedRectangle so that it fits better.
Anyways, my question is, how can I accomplish a round corners, bordered, transparency unaffected effect?
About a week ago I noticed that ( and it might just be that I'm the only one experiencing this ) while working with a PNG image with transparency, if I set a border ala borderImage, the transparent areas of the PNG would suddenly become the same color as the border color. This leads me to believe that Imagick creates a larger canvas and composites the PNG onto the canvas. I was able to resolve this issue through the use of DSTOUT ( although it took quite a while to figure out ).
Anywho, a day later I decided I wanted to add rounded corners and that's when my whole world fell apart. Trying to round the corners of an image and add a rounded corner border around it while applying the fix to the transparency problem I mentioned above has proven to be one of the most difficult experiences of my life.
I've determined this much, or atleast what I believe to be 'this much' of the solution. I need to draw a roundRectangle the dimensions of the PNG image + the borders (Layer 1) which will serve as the border, then I need to copy that roundedRectangle and scale it to the size of the PNG image (Layer 2), somehow I need to DSTOUT the shape of Layer 2 onto Layer 1, get the PNG image in the shape of Layer 2 (Layer 3), and then DSTIN the Layer 3 onto Layer 1. Whew! That's a mouthful! While I've been unsuccessful in my attempts to perform exactly to the T the process I just described. I had come up with an alternative but the rounded border looks frankly like ass.
Code: Select all
$canvas_width = ($this->requestImageCurrentWidth() + ($this->requestImageBorder() * 2));
$canvas_height = ($this->requestImageCurrentHeight() + ($this->requestImageBorder() * 2));
$canvas = new Imagick();
$cutout = new Imagick();
$cutout->newImage($this->requestImageCurrentWidth(), $this->requestImageCurrentHeight(), "#FF0000");
$canvas_cutout = new ImagickDraw();
$canvas_cutout->setFillColor($this->requestImageBorderColor());
if ($this->requestImageRoundCorners() > 0)
{
$cutout->roundCorners($this->requestImageRoundCorners(), $this->requestImageRoundCorners());
$canvas_cutout->roundRectangle(0, 0, $canvas_width, $canvas_height, $this->requestImageRoundCorners(), $this->requestImageRoundCorners());
}
else
{
$canvas_cutout->rectangle(0, 0, $canvas_width, $canvas_height);
}
$canvas_cutout->composite(Imagick::COMPOSITE_DSTOUT, $this->requestImageBorder(), $this->requestImageBorder(), $this->requestImageCurrentWidth(), $this->requestImageCurrentHeight(), $cutout);
foreach($this->image_resource as $image_key => $image_frame)
{
if ($this->requestImageRoundCorners() > 0)
{
$image_frame->roundCorners($this->requestImageRoundCorners(), $this->requestImageRoundCorners());
}
$canvas->newImage($canvas_width, $canvas_height, "#FF000000");
$canvas->drawImage($canvas_cutout);
$canvas->compositeImage($image_frame, Imagick::COMPOSITE_OVER, $this->requestImageBorder(), $this->requestImageBorder());
$canvas->setImageFormat($this->requestImageCurrentFormat());
$canvas->setImageDelay($this->image_resource->getImageDelay());
}
$this->image_resource = $canvas->clone();
$canvas_cutout->clear();
$canvas_cutout->destroy();
$cutout->clear();
$cutout->destroy();
$canvas->clear();
$canvas->destroy();
Hence the reason why I decided that I need to copy and scale the initial roundedRectangle so that it fits better.
Anyways, my question is, how can I accomplish a round corners, bordered, transparency unaffected effect?