milarin/gg
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update README.md

Browse Source
This commit is contained in:
Michael Fogleman 2016-02-21 17:20:33 -05:00
parent c126f15b11
commit 9c129741d4
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
README.md
View File

@ -66,6 +66,8 @@ StrokePreserve()
FillPreserve() FillPreserve()
``` ```
It is often desired to center an image at a point. Use `DrawImageAnchored` with `ax` and `ay` set to 0.5 to do this. Use 0 to left or top align. Use 1 to right or bottom align. `DrawStringAnchored` does the same for text, so you don't need to call `MeasureString` yourself.
## Text Functions ## Text Functions
```go ```go
@ -113,6 +115,10 @@ TransformPoint(x, y float64) (tx, ty float64)
InvertY() InvertY()
``` ```
It is often desired to rotate or scale about a point that is not the origin. The functions `RotateAbout`, `ScaleAbout`, `ShearAbout` are provided as a convenience.
`InvertY` is provided in case Y should increase from bottom to top vs. the default top to bottom.
Note: transforms do not currently affect `DrawImage` or `DrawString`. Note: transforms do not currently affect `DrawImage` or `DrawString`.
## Stack Functions ## Stack Functions