From d03d7187c1881237b1a98404a125507d33d85a0e Mon Sep 17 00:00:00 2001
From: Fox Caminiti <fox@foxcam.net>
Date: Sun, 21 Aug 2022 22:05:10 -0400
Subject: a bit of housekeeping

---
 bezier.cpp | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'bezier.cpp')

diff --git a/bezier.cpp b/bezier.cpp
index 63cc328..f41bd06 100644
--- a/bezier.cpp
+++ b/bezier.cpp
@@ -209,3 +209,50 @@ Mask_AddPointToCurve(mask *Mask, uint16 Index, real32 ratio)
     PointToAdd->TangentRight = -(NewPos - NewHandleRight);
     Mask->NumberOfPoints++;
 }
+
+static void
+Mask_RasterizePoints(mask *Mask)
+{
+    Mask->NumberOfVerts = 0;
+    for (int i = 0; i < Mask->NumberOfPoints; i++) {
+        mask_point Point0 = Mask->Point[i];
+        mask_point Point1 = Mask->Point[i+1];
+        if (i+1 == Mask->NumberOfPoints)
+            Point1 = Mask->Point[0];
+
+        if (Point0.HandleBezier && Point1.HandleBezier) {
+            Bezier_CubicCalcPoints(Point0.Pos, Point0.Pos + Point0.TangentRight, Point1.Pos + Point1.TangentLeft, Point1.Pos,
+                                   Mask->TriangulatedPointCache, &Mask->NumberOfVerts);
+        } else if (Point0.HandleBezier) {
+            Bezier_CubicCalcPoints(Point0.Pos, Point0.Pos + Point0.TangentRight, Point1.Pos, Point1.Pos,
+                                   Mask->TriangulatedPointCache, &Mask->NumberOfVerts);
+        } else if (Point1.HandleBezier) {
+            Bezier_CubicCalcPoints(Point0.Pos, Point0.Pos, Point1.Pos + Point1.TangentLeft, Point1.Pos,
+                                   Mask->TriangulatedPointCache, &Mask->NumberOfVerts);
+        } else {
+            real32 *Data = (real32 *)Mask->TriangulatedPointCache + Mask->NumberOfVerts*3;
+            *(Data++) = Point0.Pos.x;
+            *(Data++) = Point0.Pos.y;
+            *(Data++) = 0;
+            // NOTE(fox): CubicCalcPoints sometimes misses generating the start
+            // point of the next path in the above two cases, so I'm making
+            // straight lines always add both points as a hotfix. This leads
+            // to cases of duplicate verts, but it doesn't seem like it harms
+            // the rendering in any way.
+            *(Data++) = Point1.Pos.x;
+            *(Data++) = Point1.Pos.y;
+            *(Data++) = 0;
+            Mask->NumberOfVerts += 2;
+        }
+    }
+}
+
+void Mask_TriangulateAndRasterize(memory *Memory, project_layer *Layer, mask *Mask)
+{
+    if (!Mask->TriangulatedPointCache) {
+        Mask->TriangulatedPointCache = AllocateMemory(Memory, 50*1024, P_VectorPoints);
+    }
+    Mask_RasterizePoints(Mask);
+
+    GL_RasterizeShape(Layer, Mask);
+}
-- 
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