diff --git a/src/libkwineffects/kwineffects.cpp b/src/libkwineffects/kwineffects.cpp
index d8711b45ef..ddf2674c40 100644
--- a/src/libkwineffects/kwineffects.cpp
+++ b/src/libkwineffects/kwineffects.cpp
@@ -1020,94 +1020,6 @@ WindowQuadList WindowQuadList::makeRegularGrid(int xSubdivisions, int ySubdivisi
     return ret;
 }
 
-#ifndef GL_TRIANGLES
-#define GL_TRIANGLES 0x0004
-#endif
-
-#ifndef GL_QUADS
-#define GL_QUADS 0x0007
-#endif
-
-void WindowQuadList::makeInterleavedArrays(unsigned int type, GLVertex2D *vertices, const QMatrix4x4 &textureMatrix, qreal scale) const
-{
-    // Since we know that the texture matrix just scales and translates
-    // we can use this information to optimize the transformation
-    const QVector2D coeff(textureMatrix(0, 0), textureMatrix(1, 1));
-    const QVector2D offset(textureMatrix(0, 3), textureMatrix(1, 3));
-
-    GLVertex2D *vertex = vertices;
-
-    Q_ASSERT(type == GL_QUADS || type == GL_TRIANGLES);
-
-    switch (type) {
-    case GL_QUADS: {
-        for (const WindowQuad &quad : *this) {
-#pragma GCC unroll 4
-            for (int j = 0; j < 4; j++) {
-                const WindowVertex &wv = quad[j];
-
-                auto vertexPos = roundVector(QVector2D(wv.x(), wv.y()) * scale);
-                GLVertex2D v;
-                v.position = vertexPos;
-                v.texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
-
-                *(vertex++) = v;
-            }
-        }
-    } break;
-    case GL_TRIANGLES: {
-        for (const WindowQuad &quad : *this) {
-            GLVertex2D v[4]; // Four unique vertices / quad
-
-#pragma GCC unroll 4
-            for (int j = 0; j < 4; j++) {
-                const WindowVertex &wv = quad[j];
-
-                auto vertexPos = roundVector(QVector2D(wv.x(), wv.y()) * scale);
-                v[j].position = vertexPos;
-                v[j].texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
-            }
-
-            // First triangle
-            *(vertex++) = v[1]; // Top-right
-            *(vertex++) = v[0]; // Top-left
-            *(vertex++) = v[3]; // Bottom-left
-
-            // Second triangle
-            *(vertex++) = v[3]; // Bottom-left
-            *(vertex++) = v[2]; // Bottom-right
-            *(vertex++) = v[1]; // Top-right
-        }
-    } break;
-    default:
-        break;
-    }
-}
-
-void WindowQuadList::makeArrays(float **vertices, float **texcoords, const QSizeF &size, bool yInverted) const
-{
-    *vertices = new float[count() * 6 * 2];
-    *texcoords = new float[count() * 6 * 2];
-
-    float *vpos = *vertices;
-    float *tpos = *texcoords;
-
-    // Note: The positions in a WindowQuad are stored in clockwise order
-    const int index[] = {1, 0, 3, 3, 2, 1};
-
-    for (const WindowQuad &quad : *this) {
-        for (int j = 0; j < 6; j++) {
-            const WindowVertex &wv = quad[index[j]];
-
-            *vpos++ = wv.x();
-            *vpos++ = wv.y();
-
-            *tpos++ = wv.u() / size.width();
-            *tpos++ = yInverted ? (wv.v() / size.height()) : (1.0 - wv.v() / size.height());
-        }
-    }
-}
-
 void RenderGeometry::copy(std::span<GLVertex2D> destination)
 {
     Q_ASSERT(int(destination.size()) >= size());
diff --git a/src/libkwineffects/kwineffects.h b/src/libkwineffects/kwineffects.h
index 7591d1ef4d..0d0dfc7d3c 100644
--- a/src/libkwineffects/kwineffects.h
+++ b/src/libkwineffects/kwineffects.h
@@ -2948,8 +2948,6 @@ public:
     WindowQuadList splitAtY(double y) const;
     WindowQuadList makeGrid(int maxquadsize) const;
     WindowQuadList makeRegularGrid(int xSubdivisions, int ySubdivisions) const;
-    void makeInterleavedArrays(unsigned int type, GLVertex2D *vertices, const QMatrix4x4 &matrix, qreal scale) const;
-    void makeArrays(float **vertices, float **texcoords, const QSizeF &size, bool yInverted) const;
 };
 
 /**