lordwelch/PresentationApp
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

documentaion

Browse Source
This commit is contained in:
lordwelch 2016-03-24 09:16:15 -07:00
parent f0c49df67b
commit 43db9e18cc
2 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
magickwand.go
View File

@ -7,6 +7,11 @@ import (
"gopkg.in/gographics/imagick.v2/imagick" "gopkg.in/gographics/imagick.v2/imagick"
) )
/*resizeImage() mw fullsize image
newwidth, newheight = size to be resized to
keepSpecSize = return image with exactly the size specified or just the size of the resized image
center = senter the image
*/
func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize, center bool) (resmw *imagick.MagickWand) { func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize, center bool) (resmw *imagick.MagickWand) {
var ( var (
width, height, origHeight, origWidth int width, height, origHeight, origWidth int
@ -14,11 +19,14 @@ func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize,
origHeight = int(mw.GetImageHeight()) origHeight = int(mw.GetImageHeight())
origWidth = int(mw.GetImageWidth()) origWidth = int(mw.GetImageWidth())
//check if requested size is the same as current size
if (origHeight != newHeight) || (origWidth != newWidth) { if (origHeight != newHeight) || (origWidth != newWidth) {
// width / height * newheight = newwidth
if (round((float64(origWidth) / float64(origHeight)) * float64(newHeight))) <= newWidth { if (round((float64(origWidth) / float64(origHeight)) * float64(newHeight))) <= newWidth {
width = round((float64(origWidth) / float64(origHeight)) * float64(newHeight)) width = round((float64(origWidth) / float64(origHeight)) * float64(newHeight))
height = newHeight height = newHeight
} else { } else {
// height / width * newwidth = newheight
height = round((float64(origHeight) / float64(origWidth)) * float64(newWidth)) height = round((float64(origHeight) / float64(origWidth)) * float64(newWidth))
width = newWidth width = newWidth
} }
@ -27,18 +35,21 @@ func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize,
width = newWidth width = newWidth
} }
//new magickwand for resized image
resmw = imagick.NewMagickWand() resmw = imagick.NewMagickWand()
if !keepSpecSize { if !keepSpecSize {
resmw.NewImage(uint(width), uint(height), imagick.NewPixelWand()) resmw.NewImage(uint(width), uint(height), imagick.NewPixelWand())
center = false center = false
} else { } else {
//blank image
resmw.NewImage(uint(newWidth), uint(newHeight), imagick.NewPixelWand()) resmw.NewImage(uint(newWidth), uint(newHeight), imagick.NewPixelWand())
//fmt.Println(resmw.GetImageHeight(), resmw.GetImageWidth())
if center { if center {
err = mw.ResizeImage(uint(width), uint(height), imagick.FILTER_LANCZOS, 1) err = mw.ResizeImage(uint(width), uint(height), imagick.FILTER_LANCZOS, 1)
if err != nil { if err != nil {
panic(err) panic(err)
} }
//centers image
resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, round(float64(newWidth-width)/float64(2)), round(float64(newHeight-height)/float64(2))) resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, round(float64(newWidth-width)/float64(2)), round(float64(newHeight-height)/float64(2)))
} else { } else {
resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, 0, 0) resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, 0, 0)

2
main.go
View File

@ -86,8 +86,10 @@ func run() error {
textEdit = window.ObjectByName("textEdit") textEdit = window.ObjectByName("textEdit")
slides.addCell() slides.addCell()
//signals for whole qml //signals for whole qml
setSignals() setSignals()
//image is ready for imageprovider //image is ready for imageprovider
imgready = true imgready = true