diff -r 910890292639 -r 9f435f66bd0c src/gl/axesprogram.cpp
--- a/src/gl/axesprogram.cpp	Fri Feb 05 14:23:16 2021 +0200
+++ b/src/gl/axesprogram.cpp	Wed Feb 17 16:49:35 2021 +0200
@@ -72,6 +72,11 @@
 	AxesVertex{{0, 0, 0}, {0, 0, 0.5}},
 };
 
+constexpr std::size_t vertexSize = sizeof data[0];
+
+AxesProgram::AxesProgram(QObject* parent) :
+	AbstractShaderProgram{{{GL_LINES, ::vertexSize}}, parent} {}
+
 const char* AxesProgram::vertexShaderSource() const
 {
 	return ::vertexShaderSource;
@@ -87,28 +92,13 @@
 	return ::data;
 }
 
-GLenum AxesProgram::drawMode() const
-{
-	return GL_LINES;
-}
-
-int AxesProgram::vertexSize() const
-{
-	return sizeof data[0];
-}
-
-int AxesProgram::vertexCount() const
-{
-	return countof(data);
-}
-
 void AxesProgram::setupVertexArrays()
 {
 	for (int i : {0, 1})
 	{
 		this->program->enableAttributeArray(i);
 	}
-	const int stride = this->vertexSize();
-	this->program->setAttributeBuffer(0, GL_FLOAT, offsetof(AxesVertex, position), 3, stride);
-	this->program->setAttributeBuffer(1, GL_FLOAT, offsetof(AxesVertex, color), 3, stride);
+	this->program->setAttributeBuffer(0, GL_FLOAT, offsetof(AxesVertex, position), 3, ::vertexSize);
+	this->program->setAttributeBuffer(1, GL_FLOAT, offsetof(AxesVertex, color), 3, ::vertexSize);
+	this->upload(&this->arrays[0], ::data, countof(data));
 }