Mathis/sharp
1
0
Fork 0
mirror of https://github.com/lovell/sharp.git synced 2026-02-05 06:06:18 +01:00
Code Issues Packages Projects Releases Wiki Activity

Add gravity support to embed feature (#1038)

Browse Source
This commit is contained in:
Kenric D'Souza
2017-12-13 00:59:16 +05:30
committed by Lovell Fuller
parent 1d7a0ea99e
commit 927b77700d
28 changed files with 426 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/common.cc
View File

@@ -409,7 +409,62 @@ namespace sharp {
/*
Calculate the (left, top) coordinates of the output image
within the input image, applying the given gravity.
within the input image, applying the given gravity during an embed.
@Azurebyte: We are basically swapping the inWidth and outWidth, inHeight and outHeight from the CalculateCrop function.
*/
std::tuple<int, int> CalculateEmbedPosition(int const inWidth, int const inHeight,
int const outWidth, int const outHeight, int const gravity) {
int left = 0;
int top = 0;
switch (gravity) {
case 1:
// North
left = (outWidth - inWidth) / 2;
break;
case 2:
// East
left = outWidth - inWidth;
top = (outHeight - inHeight) / 2;
break;
case 3:
// South
left = (outWidth - inWidth) / 2;
top = outHeight - inHeight;
break;
case 4:
// West
top = (outHeight - inHeight) / 2;
break;
case 5:
// Northeast
left = outWidth - inWidth;
break;
case 6:
// Southeast
left = outWidth - inWidth;
top = outHeight - inHeight;
break;
case 7:
// Southwest
top = outHeight - inHeight;
break;
case 8:
// Northwest
// Which is the default is 0,0 so we do not assign anything here.
break;
default:
// Centre
left = (outWidth - inWidth) / 2;
top = (outHeight - inHeight) / 2;
}
return std::make_tuple(left, top);
}
/*
Calculate the (left, top) coordinates of the output image
within the input image, applying the given gravity during a crop.
*/
std::tuple<int, int> CalculateCrop(int const inWidth, int const inHeight,
int const outWidth, int const outHeight, int const gravity) {