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LibWeb: Support skew{X,Y} in stacking context transforms

Browse source 
https://drafts.csswg.org/css-transforms/#SkewDefined
This commit is contained in:
Luke Wilde 2023-08-09 19:59:54 +01:00 • committed by Andreas Kling
parent 34cd7f4c22
commit fb33514029
Notes: sideshowbarker 2024-07-17 07:14:09 +09:00
1 changed files with 26 additions and 0 deletions
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26
Userland/Libraries/LibWeb/Painting/StackingContext.cpp
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@ -341,6 +341,32 @@ Gfx::FloatMatrix4x4 StackingContext::get_transformation_matrix(CSS::Transformati
if (count == 1)
return Gfx::rotation_matrix({ 0.0f, 0.0f, 1.0f }, value(0));
break;
case CSS::TransformFunction::Skew:
if (count == 1)
return Gfx::FloatMatrix4x4(1, tanf(value(0)), 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
if (count == 2)
return Gfx::FloatMatrix4x4(1, tanf(value(0)), 0, 0,
tanf(value(1)), 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
break;
case CSS::TransformFunction::SkewX:
if (count == 1)
return Gfx::FloatMatrix4x4(1, tanf(value(0)), 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
break;
case CSS::TransformFunction::SkewY:
if (count == 1)
return Gfx::FloatMatrix4x4(1, 0, 0, 0,
tanf(value(0)), 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
break;
default:
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Unhandled transformation function {}", MUST(CSS::TransformationStyleValue::create(transformation.function, {}))->to_string());
}