diff -r 910890292639 -r 9f435f66bd0c src/gl/gridprogram.cpp
--- a/src/gl/gridprogram.cpp	Fri Feb 05 14:23:16 2021 +0200
+++ b/src/gl/gridprogram.cpp	Wed Feb 17 16:49:35 2021 +0200
@@ -63,6 +63,10 @@
 )";
 
 static const glm::vec2 data[] = {{-1, -1}, {-1, 1}, {1, 1}, {1, -1}};
+constexpr std::size_t vertexSize = sizeof data[0];
+
+GridProgram::GridProgram(QObject* parent) :
+	AbstractShaderProgram{{{GL_QUADS, vertexSize}}, parent}
 
 void GridProgram::setGridMatrix(const glm::mat4& newGridMatrix)
 {
@@ -95,29 +99,11 @@
 	return ::fragmentShaderSource;
 }
 
-const void* GridProgram::vertexData() const
-{
-	return ::data;
-}
-
-int GridProgram::vertexSize() const
-{
-	return sizeof data[0];
-}
-
-int GridProgram::vertexCount() const
-{
-	return glm::countof(data);
-}
-
 void GridProgram::setupVertexArrays()
 {
 	this->program->enableAttributeArray(0);
 	this->program->setAttributeBuffer(0, GL_FLOAT, 0, 2, 0);
 	this->program->setUniformVector("gridColor", this->gridColor);
+	this->upload(&this->arrays[0], ::data, countof(data));
 }
 
-GLenum GridProgram::drawMode() const
-{
-	return GL_QUADS;
-}