first code attempt

build/shaders/ppi_bearing.frag

@@ -0,0 +1,6 @@
+#version 330 core
+uniform vec3 uColor;
+out vec4 FragColor;
+void main() {
+    FragColor = vec4(uColor, 1.0);
+}

build/shaders/ppi_bearing.vert

@@ -0,0 +1,5 @@
+#version 330 core
+layout(location = 0) in vec2 aPos;
+void main() {
+    gl_Position = vec4(aPos, 0.0, 1.0);
+}

build/shaders/scope_bounds.frag

@@ -0,0 +1,6 @@
+#version 330 core
+uniform vec3 uColor;
+out vec4 FragColor;
+void main() {
+    FragColor = vec4(uColor, 1.0);
+}

build/shaders/scope_bounds.vert

@@ -0,0 +1,5 @@
+#version 330 core
+layout(location = 0) in vec2 aPos;
+void main() {
+    gl_Position = vec4(aPos, 0.0, 1.0);
+}

build/shaders/text.frag

@@ -0,0 +1,9 @@
+#version 330 core
+in vec2 vUV;
+uniform sampler2D uTexture;
+uniform vec3 uColor;
+out vec4 FragColor;
+void main() {
+    float alpha = texture(uTexture, vUV).r;
+    FragColor = vec4(uColor, alpha);
+}

build/shaders/text.vert

@@ -0,0 +1,8 @@
+#version 330 core
+layout(location = 0) in vec2 aPos;
+layout(location = 1) in vec2 aUV;
+out vec2 vUV;
+void main() {
+    gl_Position = vec4(aPos, 0.0, 1.0);
+    vUV = aUV;
+}