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fix flipped color of MSDF fonts

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This commit is contained in:
fibref
2026-02-19 15:12:25 +08:00
parent c9fbafe014
commit be4e1edc3e
1 changed files with 14 additions and 1 deletions
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15
Source/Engine/Render2D/MSDFGenerator.h
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@@ -6,6 +6,7 @@
#include "Engine/Core/Math/Math.h"
#include <ThirdParty/freetype/ftoutln.h>
#include <ThirdParty/msdfgen/msdfgen.h>
#include <ThirdParty/msdfgen/msdfgen/core/ShapeDistanceFinder.h>
class MSDFGenerator
{
@@ -72,6 +73,17 @@ class MSDFGenerator
return 0;
}
static void correctWinding(Shape& shape, Shape::Bounds& bounds)
{
Point2 p(bounds.l - (bounds.r - bounds.l) - 1, bounds.b - (bounds.t - bounds.b) - 1);
double distance = msdfgen::SimpleTrueShapeDistanceFinder::oneShotDistance(shape, p);
if (distance > 0)
{
for (auto& contour : shape.contours)
contour.reverse();
}
}
public:
static void GenerateMSDF(FT_GlyphSlot glyph, Array<byte>& output, int32& outputWidth, int32& outputHeight, int16& top, int16& left)
{
@@ -98,7 +110,7 @@ public:
// Also hard-coded in material: MSDFFontMaterial
const double pxRange = 4.0;
msdfgen::Shape::Bounds bounds = shape.getBounds();
Shape::Bounds bounds = shape.getBounds();
int32 width = static_cast<int32>(Math::CeilToInt(bounds.r - bounds.l + pxRange));
int32 height = static_cast<int32>(Math::CeilToInt(bounds.t - bounds.b + pxRange));
msdfgen::Bitmap<float, 4> msdf(width, height);
@@ -106,6 +118,7 @@ public:
msdfgen::SDFTransformation t(
msdfgen::Projection(1.0, msdfgen::Vector2(-bounds.l + pxRange / 2.0, -bounds.b + pxRange / 2.0)), msdfgen::Range(pxRange)
);
correctWinding(shape, bounds);
generateMTSDF(msdf, shape, t);
output.Resize(width * height * 4);