imagecopyresized
Copy and resize part of an image
&reftitle.description;
boolimagecopyresized
GdImagedst_image
GdImagesrc_image
intdst_x
intdst_y
intsrc_x
intsrc_y
intdst_width
intdst_height
intsrc_width
intsrc_height
imagecopyresized copies a rectangular
portion of one image to another image.
dst_image is the destination image,
src_image is the source image identifier.
In other words, imagecopyresized will take a
rectangular area from src_image of width
src_width and height src_height at
position (src_x,src_y)
and place it in a rectangular area of dst_image
of width dst_width and height dst_height
at position (dst_x,dst_y).
If the source and destination coordinates and width and heights
differ, appropriate stretching or shrinking of the image fragment
will be performed. The coordinates refer to the upper left
corner. This function can be used to copy regions within the
same image (if dst_image is the same as
src_image) but if the regions overlap the
results will be unpredictable.
&reftitle.parameters;
dst_image
&gd.image.destination;
src_image
&gd.image.source;
dst_x
x-coordinate of destination point.
dst_y
y-coordinate of destination point.
src_x
x-coordinate of source point.
src_y
y-coordinate of source point.
dst_width
Destination width.
dst_height
Destination height.
src_width
&gd.source.width;
src_height
&gd.source.height;
&reftitle.returnvalues;
&return.success;
&reftitle.changelog;
&Version;
&Description;
8.0.0
dst_image and src_image expect
GdImage instances now; previously, resources
were expected.
&reftitle.examples;
Resizing an image
This example will display the image at half size.
]]>
&example.outputs.similar;
Output of example : Resizing an image
The image will be output at half size, though better
quality could be obtained using imagecopyresampled.
&reftitle.notes;
There is a problem due to palette image limitations (255+1 colors).
Resampling or filtering an image commonly needs more colors than 255, a
kind of approximation is used to calculate the new resampled pixel and its
color. With a palette image we try to allocate a new color, if that
failed, we choose the closest (in theory) computed color. This is
not always the closest visual color. That may produce a weird result, like
blank (or visually blank) images. To skip this problem, please use a
truecolor image as a destination image, such as one created by
imagecreatetruecolor.
&reftitle.seealso;
imagecopyresampled
imagescale
imagecrop