pbimage

Image type conversion, scaling, modification in Powerbuilder

more information:pbni-rs

• Build

cargo build --release
# Copy \target\i686-pc-windows-msvc\release\pbimage.dll file to the pb project directory

Conversion

BMP,JPEG,GIF,PNG,ICO,TIFF,WEBP

• File

nrs_tp_image nimage
nimage = create nrs_tp_image
if nimage.open("pic.jpg") then
    //Convert jpg images to png format,save to file;
    nimage.save("pic.png")
end if

• Blob

blob bimg
nrs_tp_image nimage
nimage = create nrs_tp_image
if nimage.open("pic.jpg") then
    //Convert jpg images to png format,data to blob;
    bimg = nimage.as_bytes(enum.IMAGEFORMAT_PNG))
end if

Scaling

• Thumbnail

nrs_tp_image nimage
nimage = create nrs_tp_image
if nimage.open("pic.jpg") then
    //Generate 200 * 200 thumbnail and convert to png
    nimage.thumbnail(200,200).save("pic.png")
end if

• Resize

nrs_tp_image nimage
nimage = create nrs_tp_image
if nimage.open("pic.jpg") then
    //Resize to 200 * 200 with FILTERTYPE_NEAREST and convert to png
    nimage.resize(200,200,enum.FILTERTYPE_NEAREST).save("pic.png")
end if

Modify

Function Name	Description
public function ulong height()	height
public function ulong width()	width
public function nrs_tp_image grayscale()	grayscale
public subroutine invert()	invert
public function nrs_tp_image blur(readonly real sigma)	blur
public function nrs_tp_image unsharpen(readonly real sigma,readonly long threshold)	unsharpen
public function nrs_tp_image adjust_contrast(readonly real c)	adjust_contrast
public function nrs_tp_image brighten(readonly long v)	brighten
public function nrs_tp_image huerotate(readonly long v)	huerotate
public function nrs_tp_image flipv()	flipv
public function nrs_tp_image fliph()	fliph
public function nrs_tp_image rotate90()	rotate90
public function nrs_tp_image rotate180()	rotate180
public function nrs_tp_image rotate270()	rotate270

Chaining Style

nrs_tp_image nimage
nimage = create nrs_tp_image
if nimage.open("pic.jpg") then
    //Chaining Style
    nimage.thumbnail(200,200).grayscale().blur(2.0).flipv().save("pic.png")
end if

More...

public function nrs_tp_image resize(readonly ulong nwidth,readonly ulong nheight,readonly uint filtertype)
public function nrs_tp_image resize_exact(readonly ulong nwidth,readonly ulong nheight,readonly uint filtertype)
public function nrs_tp_image resize_to_fill(readonly ulong nwidth,readonly ulong nheight,readonly uint filtertype)
public function nrs_tp_image thumbnail(readonly ulong nwidth,readonly ulong nheight)
public function nrs_tp_image thumbnail_exact(readonly ulong nwidth,readonly ulong nheight)
public function uint color()