oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-06-27 16:36:03 +00:00
Code Wiki Activity

Add support for 9-sliced backgrounds (#8600)

Browse source 
9-slice textures are commonly used in GUIs to allow scaling them to match any resolution without distortion.

https://en.wikipedia.org/wiki/9-slice_scaling
This commit is contained in:
rubenwardy 2019-06-22 15:03:54 +01:00 • committed by SmallJoker
parent 4e3c1916f7
commit 429a989648
5 changed files with 137 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

59
src/client/guiscalingfilter.cpp
View file

@ -167,3 +167,62 @@ void draw2DImageFilterScaled(video::IVideoDriver *driver, video::ITexture *txr,
driver->draw2DImage(scaled, destrect, mysrcrect, cliprect, colors, usealpha);
}
void draw2DImage9Slice(video::IVideoDriver *driver, video::ITexture *texture,
const core::rect<s32> &rect, const core::rect<s32> &middle)
{
const video::SColor color(255,255,255,255);
const video::SColor colors[] = {color,color,color,color};
auto originalSize = texture->getOriginalSize();
core::vector2di lowerRightOffset = core::vector2di(originalSize.Width, originalSize.Height) - middle.LowerRightCorner;
for (int y = 0; y < 3; ++y) {
for (int x = 0; x < 3; ++x) {
core::rect<s32> src({0, 0}, originalSize);
core::rect<s32> dest = rect;
switch (x) {
case 0:
dest.LowerRightCorner.X = rect.UpperLeftCorner.X + middle.UpperLeftCorner.X;
src.LowerRightCorner.X = middle.UpperLeftCorner.X;
break;
case 1:
dest.UpperLeftCorner.X += middle.UpperLeftCorner.X;
dest.LowerRightCorner.X -= lowerRightOffset.X;
src.UpperLeftCorner.X = middle.UpperLeftCorner.X;
src.LowerRightCorner.X = middle.LowerRightCorner.X;
break;
case 2:
dest.UpperLeftCorner.X = rect.LowerRightCorner.X - lowerRightOffset.X;
src.UpperLeftCorner.X = middle.LowerRightCorner.X;
break;
}
switch (y) {
case 0:
dest.LowerRightCorner.Y = rect.UpperLeftCorner.Y + middle.UpperLeftCorner.Y;
src.LowerRightCorner.Y = middle.UpperLeftCorner.Y;
break;
case 1:
dest.UpperLeftCorner.Y += middle.UpperLeftCorner.Y;
dest.LowerRightCorner.Y -= lowerRightOffset.Y;
src.UpperLeftCorner.Y = middle.UpperLeftCorner.Y;
src.LowerRightCorner.Y = middle.LowerRightCorner.Y;
break;
case 2:
dest.UpperLeftCorner.Y = rect.LowerRightCorner.Y - lowerRightOffset.Y;
src.UpperLeftCorner.Y = middle.LowerRightCorner.Y;
break;
}
draw2DImageFilterScaled(driver, texture, dest,
src,
NULL/*&AbsoluteClippingRect*/, colors, true);
}
}
}