diff --git a/examples/common/mod.rs b/examples/common/mod.rs
index b241eb53..9417cd7a 100644
--- a/examples/common/mod.rs
+++ b/examples/common/mod.rs
@@ -68,7 +68,7 @@ impl Shader {
             gl::ShaderSource(
                 shader,
                 1,
-                &(source.as_ptr() as *const GLchar),
+                &(source.as_ptr().cast()),
                 &(source.len() as GLint),
             );
             ck();
@@ -116,7 +116,7 @@ impl Buffer {
             gl::BufferData(
                 gl::ARRAY_BUFFER,
                 data.len() as isize,
-                data.as_ptr() as *const c_void,
+                data.as_ptr().cast(),
                 gl::STATIC_DRAW,
             );
             ck();
diff --git a/examples/offscreen.rs b/examples/offscreen.rs
index 5249b94e..28d42ff5 100644
--- a/examples/offscreen.rs
+++ b/examples/offscreen.rs
@@ -188,7 +188,7 @@ impl TriVertexArray {
             ck();
 
             let vertex_buffer = Buffer::from_data(slice::from_raw_parts(
-                TRI_VERTICES.as_ptr() as *const u8,
+                TRI_VERTICES.as_ptr().cast(),
                 mem::size_of::<Vertex>() * 3,
             ));
 
@@ -251,10 +251,10 @@ impl TriProgram {
         let program = Program::new(vertex_shader, fragment_shader);
         unsafe {
             let position_attribute =
-                gl::GetAttribLocation(program.object, c"aPosition".as_ptr() as *const GLchar);
+                gl::GetAttribLocation(program.object, c"aPosition".as_ptr().cast());
             ck();
             let color_attribute =
-                gl::GetAttribLocation(program.object, c"aColor".as_ptr() as *const GLchar);
+                gl::GetAttribLocation(program.object, c"aColor".as_ptr().cast());
             ck();
             TriProgram {
                 program,
diff --git a/examples/threads.rs b/examples/threads.rs
index dfd3a6ce..7f9ad57e 100644
--- a/examples/threads.rs
+++ b/examples/threads.rs
@@ -811,26 +811,26 @@ impl BlitProgram {
         let program = Program::new(vertex_shader, fragment_shader);
         unsafe {
             let position_attribute =
-                gl::GetAttribLocation(program.object, c"aPosition".as_ptr() as *const GLchar);
+                gl::GetAttribLocation(program.object, c"aPosition".as_ptr().cast());
             ck();
             let transform_uniform =
-                gl::GetUniformLocation(program.object, c"uTransform".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTransform".as_ptr().cast());
             ck();
             let translation_uniform =
-                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr().cast());
             ck();
             let tex_transform_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTransform".as_ptr() as *const GLchar,
+                c"uTexTransform".as_ptr().cast(),
             );
             ck();
             let tex_translation_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTranslation".as_ptr() as *const GLchar,
+                c"uTexTranslation".as_ptr().cast(),
             );
             ck();
             let source_uniform =
-                gl::GetUniformLocation(program.object, c"uSource".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uSource".as_ptr().cast());
             ck();
             BlitProgram {
                 program,
@@ -883,48 +883,48 @@ impl GridProgram {
         let program = Program::new(vertex_shader, fragment_shader);
         unsafe {
             let position_attribute =
-                gl::GetAttribLocation(program.object, c"aPosition".as_ptr() as *const GLchar);
+                gl::GetAttribLocation(program.object, c"aPosition".as_ptr().cast());
             ck();
             let transform_uniform =
-                gl::GetUniformLocation(program.object, c"uTransform".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTransform".as_ptr().cast());
             ck();
             let translation_uniform =
-                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr().cast());
             ck();
             let tex_transform_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTransform".as_ptr() as *const GLchar,
+                c"uTexTransform".as_ptr().cast(),
             );
             ck();
             let tex_translation_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTranslation".as_ptr() as *const GLchar,
+                c"uTexTranslation".as_ptr().cast(),
             );
             ck();
             let gridline_color_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uGridlineColor".as_ptr() as *const GLchar,
+                c"uGridlineColor".as_ptr().cast(),
             );
             ck();
             let bg_color_uniform =
-                gl::GetUniformLocation(program.object, c"uBGColor".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uBGColor".as_ptr().cast());
             ck();
             let radius_uniform =
-                gl::GetUniformLocation(program.object, c"uRadius".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uRadius".as_ptr().cast());
             ck();
             let camera_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uCameraPosition".as_ptr() as *const GLchar,
+                c"uCameraPosition".as_ptr().cast(),
             );
             ck();
             let light_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uLightPosition".as_ptr() as *const GLchar,
+                c"uLightPosition".as_ptr().cast(),
             );
             ck();
             let sphere_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uSpherePosition".as_ptr() as *const GLchar,
+                c"uSpherePosition".as_ptr().cast(),
             );
             ck();
             GridProgram {
@@ -985,54 +985,54 @@ impl CheckProgram {
         let program = Program::new(vertex_shader, fragment_shader);
         unsafe {
             let position_attribute =
-                gl::GetAttribLocation(program.object, c"aPosition".as_ptr() as *const GLchar);
+                gl::GetAttribLocation(program.object, c"aPosition".as_ptr().cast());
             ck();
             let transform_uniform =
-                gl::GetUniformLocation(program.object, c"uTransform".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTransform".as_ptr().cast());
             ck();
             let translation_uniform =
-                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uTranslation".as_ptr().cast());
             ck();
             let tex_transform_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTransform".as_ptr() as *const GLchar,
+                c"uTexTransform".as_ptr().cast(),
             );
             ck();
             let tex_translation_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uTexTranslation".as_ptr() as *const GLchar,
+                c"uTexTranslation".as_ptr().cast(),
             );
             ck();
             let rotation_uniform =
-                gl::GetUniformLocation(program.object, c"uRotation".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uRotation".as_ptr().cast());
             ck();
             let color_a_uniform =
-                gl::GetUniformLocation(program.object, c"uColorA".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uColorA".as_ptr().cast());
             ck();
             let color_b_uniform =
-                gl::GetUniformLocation(program.object, c"uColorB".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uColorB".as_ptr().cast());
             ck();
             let viewport_origin_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uViewportOrigin".as_ptr() as *const GLchar,
+                c"uViewportOrigin".as_ptr().cast(),
             );
             ck();
             let radius_uniform =
-                gl::GetUniformLocation(program.object, c"uRadius".as_ptr() as *const GLchar);
+                gl::GetUniformLocation(program.object, c"uRadius".as_ptr().cast());
             ck();
             let camera_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uCameraPosition".as_ptr() as *const GLchar,
+                c"uCameraPosition".as_ptr().cast(),
             );
             ck();
             let light_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uLightPosition".as_ptr() as *const GLchar,
+                c"uLightPosition".as_ptr().cast(),
             );
             ck();
             let sphere_position_uniform = gl::GetUniformLocation(
                 program.object,
-                c"uSpherePosition".as_ptr() as *const GLchar,
+                c"uSpherePosition".as_ptr().cast(),
             );
             ck();
             CheckProgram {