Minor cleanups

citro3d/examples/triangle.rs

@@ -48,6 +48,7 @@ static VERTICES: &[Vertex] = &[
 ];
 
 static SHADER_BYTES: &[u8] = include_shader!("assets/vshader.pica");
+const CLEAR_COLOR: u32 = 0x68_B0_D8_FF;
 
 fn main() {
     let mut soc = Soc::new().expect("failed to get SOC");
@@ -87,12 +88,13 @@ fn main() {
     vbo_data.extend_from_slice(VERTICES);
 
     let mut buf_info = buffer::Info::new();
-    let (attr_info, vbo_idx) = prepare_vbos(&mut buf_info, &vbo_data);
+    let (attr_info, vbo_data) = prepare_vbos(&mut buf_info, &vbo_data);
 
     // Configure the first fragment shading substage to just pass through the vertex color
     // See https://www.opengl.org/sdk/docs/man2/xhtml/glTexEnv.xml for more insight
+    let stage0 = texenv::Stage::new(0).unwrap();
     instance
-        .texenv(texenv::Stage::new(0).unwrap())
+        .texenv(stage0)
         .src(texenv::Mode::BOTH, texenv::Source::PrimaryColor, None, None)
         .func(texenv::Mode::BOTH, texenv::CombineFunc::Replace);
 
@@ -107,18 +109,17 @@ fn main() {
 
         instance.render_frame_with(|instance| {
             let mut render_to = |target: &mut render::Target, projection| {
+                target.clear(ClearFlags::ALL, CLEAR_COLOR, 0);
+
                 instance
                     .select_render_target(target)
                     .expect("failed to set render target");
 
-                let clear_color: u32 = 0x7F_7F_7F_FF;
-                target.clear(ClearFlags::ALL, clear_color, 0);
-
                 instance.bind_vertex_uniform(projection_uniform_idx, projection);
 
                 instance.set_attr_info(&attr_info);
 
-                instance.draw_arrays(buffer::Primitive::Triangles, vbo_idx);
+                instance.draw_arrays(buffer::Primitive::Triangles, vbo_data);
             };
 
             let Projections {
@@ -134,15 +135,10 @@ fn main() {
     }
 }
 
-// sheeeesh, this sucks to type:
-fn prepare_vbos<'buf, 'info, 'vbo>(
-    buf_info: &'info mut buffer::Info,
-    vbo_data: &'vbo [Vertex],
-) -> (attrib::Info, buffer::Slice<'buf>)
-where
-    'info: 'buf,
-    'vbo: 'buf,
-{
+fn prepare_vbos<'a>(
+    buf_info: &'a mut buffer::Info,
+    vbo_data: &'a [Vertex],
+) -> (attrib::Info, buffer::Slice<'a>) {
     // Configure attributes for use with the vertex shader
     let mut attr_info = attrib::Info::new();
 

citro3d/src/lib.rs

@@ -148,16 +148,16 @@ impl Instance {
 
     /// Render primitives from the current vertex array buffer.
     #[doc(alias = "C3D_DrawArrays")]
-    pub fn draw_arrays(&mut self, primitive: buffer::Primitive, index: buffer::Slice) {
-        self.set_buffer_info(index.info());
+    pub fn draw_arrays(&mut self, primitive: buffer::Primitive, vbo_data: buffer::Slice) {
+        self.set_buffer_info(vbo_data.info());
 
         // TODO: should we also require the attrib info directly here?
 
         unsafe {
             citro3d_sys::C3D_DrawArrays(
                 primitive as ctru_sys::GPU_Primitive_t,
-                index.index(),
-                index.len(),
+                vbo_data.index(),
+                vbo_data.len(),
             );
         }
     }

citro3d/src/texenv.rs

@@ -6,20 +6,14 @@ use bitflags::bitflags;
 /// A texture combiner, also called a "texture environment" (hence the struct name).
 /// See also [`texenv.h` documentation](https://oreo639.github.io/citro3d/texenv_8h.html).
 #[doc(alias = "C3D_TexEnv")]
-pub struct TexEnv {
-    raw: *mut citro3d_sys::C3D_TexEnv,
-}
+pub struct TexEnv(*mut citro3d_sys::C3D_TexEnv);
 
 // https://oreo639.github.io/citro3d/texenv_8h.html#a9eda91f8e7252c91f873b1d43e3728b6
 pub(crate) const TEXENV_COUNT: usize = 6;
 
 impl TexEnv {
     pub(crate) fn new(stage: Stage) -> Self {
-        let mut result = unsafe {
-            Self {
-                raw: citro3d_sys::C3D_GetTexEnv(stage.0 as _),
-            }
-        };
+        let mut result = unsafe { Self(citro3d_sys::C3D_GetTexEnv(stage.0 as _)) };
         result.reset();
         result
     }
@@ -27,7 +21,7 @@ impl TexEnv {
     /// Re-initialize the texture combiner to its default state.
     pub fn reset(&mut self) {
         unsafe {
-            citro3d_sys::C3D_TexEnvInit(self.raw);
+            citro3d_sys::C3D_TexEnvInit(self.0);
         }
     }
 
@@ -48,7 +42,7 @@ impl TexEnv {
     ) -> &mut Self {
         unsafe {
             citro3d_sys::C3D_TexEnvSrc(
-                self.raw,
+                self.0,
                 mode.bits(),
                 source0 as _,
                 source1.unwrap_or(Source::PrimaryColor) as _,
@@ -67,7 +61,7 @@ impl TexEnv {
     #[doc(alias = "C3D_TexEnvFunc")]
     pub fn func(&mut self, mode: Mode, func: CombineFunc) -> &mut Self {
         unsafe {
-            citro3d_sys::C3D_TexEnvFunc(self.raw, mode.bits(), func as _);
+            citro3d_sys::C3D_TexEnvFunc(self.0, mode.bits(), func as _);
         }
 
         self