Merge branch 'master' into input/remove-dispatch-new

CHANGELOG.md

@@ -22,6 +22,7 @@
 - All winit backend internal event types now use `WinitInput` as the backend type.
 - `WinitEventLoop::dispatch_new_events` is now used to receive some `WinitEvent`s.
 - Added `TabletToolType::Unknown` as an option for tablet events
+- `render_texture` was removed from `Frame`, use `render_texture_at` or `render_texture_from_to` instead or use `Gles2Renderer::render_texture` as a direct replacement.
 - Remove `InputBackend::dispatch_new_events`, turning `InputBackend` into a definition of backend event types. Future input backends should be a `calloop::EventSource`.
 - Remove `InputBackend::EventError` associated type as it is unneeded since `dispatch_new_events` was removed.
 
@@ -46,6 +47,7 @@
 - `KeyState`, `MouseButton`, `ButtonState` and `Axis` in `backend::input` now derive `Hash`.
 - New `DrmNode` type in drm backend. This is primarily for use a backend which needs to run as client inside another session.
 - The button code for a `PointerButtonEvent` may now be obtained using `PointerButtonEvent::button_code`. 
+- `Renderer` now allows texture filtering methods to be set.
 
 ### Bugfixes
 

anvil/src/input_handler.rs

@@ -4,10 +4,6 @@ use crate::AnvilState;
 
 #[cfg(feature = "udev")]
 use crate::udev::UdevData;
-#[cfg(feature = "winit")]
-use crate::winit::WinitData;
-#[cfg(feature = "x11")]
-use crate::x11::X11Data;
 
 use smithay::{
     backend::input::{
@@ -38,6 +34,34 @@ use smithay::{
 };
 
 impl<Backend> AnvilState<Backend> {
+    fn process_common_key_action(&mut self, action: KeyAction) {
+        match action {
+            KeyAction::None => (),
+
+            KeyAction::Quit => {
+                info!(self.log, "Quitting.");
+                self.running.store(false, Ordering::SeqCst);
+            }
+
+            KeyAction::Run(cmd) => {
+                info!(self.log, "Starting program"; "cmd" => cmd.clone());
+
+                if let Err(e) = Command::new(&cmd).spawn() {
+                    error!(self.log,
+                        "Failed to start program";
+                        "cmd" => cmd,
+                        "err" => format!("{:?}", e)
+                    );
+                }
+            }
+
+            _ => unreachable!(
+                "Common key action handler encountered backend specific action {:?}",
+                action
+            ),
+        }
+    }
+
     fn keyboard_key_to_action<B: InputBackend>(&mut self, evt: B::KeyboardKeyEvent) -> KeyAction {
         let keycode = evt.key_code();
         let state = evt.state();
@@ -143,72 +167,72 @@ impl<Backend> AnvilState<Backend> {
     }
 }
 
-#[cfg(feature = "winit")]
+#[cfg(any(feature = "winit", feature = "x11"))]
-impl AnvilState<WinitData> {
+impl<Backend> AnvilState<Backend> {
-    pub fn process_input_event<B: InputBackend>(&mut self, event: InputEvent<B>) {
+    pub fn process_input_event_windowed<B: InputBackend>(&mut self, event: InputEvent<B>, output_name: &str) {
         match event {
-            InputEvent::Keyboard { event, .. } => match self.keyboard_key_to_action::<B>(event) {
+            InputEvent::Keyboard { event } => match self.keyboard_key_to_action::<B>(event) {
-                KeyAction::None => {}
-                KeyAction::Quit => {
-                    info!(self.log, "Quitting.");
-                    self.running.store(false, Ordering::SeqCst);
-                }
-                KeyAction::Run(cmd) => {
-                    info!(self.log, "Starting program"; "cmd" => cmd.clone());
-                    if let Err(e) = Command::new(&cmd).spawn() {
-                        error!(self.log,
-                            "Failed to start program";
-                            "cmd" => cmd,
-                            "err" => format!("{:?}", e)
-                        );
-                    }
-                }
                 KeyAction::ScaleUp => {
                     let current_scale = {
                         self.output_map
                             .borrow()
-                            .find_by_name(crate::winit::OUTPUT_NAME)
+                            .find_by_name(output_name)
                             .map(|o| o.scale())
                             .unwrap_or(1.0)
                     };
+
                     self.output_map
                         .borrow_mut()
-                        .update_scale_by_name(current_scale + 0.25f32, crate::winit::OUTPUT_NAME);
+                        .update_scale_by_name(current_scale + 0.25f32, output_name);
                 }
+
                 KeyAction::ScaleDown => {
                     let current_scale = {
                         self.output_map
                             .borrow()
-                            .find_by_name(crate::winit::OUTPUT_NAME)
+                            .find_by_name(output_name)
                             .map(|o| o.scale())
                             .unwrap_or(1.0)
                     };
 
-                    self.output_map.borrow_mut().update_scale_by_name(
+                    self.output_map
-                        f32::max(1.0f32, current_scale - 0.25f32),
+                        .borrow_mut()
-                        crate::winit::OUTPUT_NAME,
+                        .update_scale_by_name(f32::max(1.0f32, current_scale + 0.25f32), output_name);
-                    );
                 }
-                action => {
+
-                    warn!(self.log, "Key action {:?} unsupported on winit backend.", action);
+                action => match action {
+                    KeyAction::None | KeyAction::Quit | KeyAction::Run(_) => {
+                        self.process_common_key_action(action)
                     }
+
+                    _ => warn!(
+                        self.log,
+                        "Key action {:?} unsupported on on output {} backend.", action, output_name
+                    ),
                 },
-            InputEvent::PointerMotionAbsolute { event, .. } => self.on_pointer_move_absolute::<B>(event),
+            },
-            InputEvent::PointerButton { event, .. } => self.on_pointer_button::<B>(event),
+
-            InputEvent::PointerAxis { event, .. } => self.on_pointer_axis::<B>(event),
+            InputEvent::PointerMotionAbsolute { event } => {
-            _ => {
+                self.on_pointer_move_absolute_windowed::<B>(event, output_name)
-                // other events are not handled in anvil (yet)
             }
+            InputEvent::PointerButton { event } => self.on_pointer_button::<B>(event),
+            InputEvent::PointerAxis { event } => self.on_pointer_axis::<B>(event),
+            _ => (), // other events are not handled in anvil (yet)
         }
     }
 
-    fn on_pointer_move_absolute<B: InputBackend>(&mut self, evt: B::PointerMotionAbsoluteEvent) {
+    fn on_pointer_move_absolute_windowed<B: InputBackend>(
+        &mut self,
+        evt: B::PointerMotionAbsoluteEvent,
+        output_name: &str,
+    ) {
         let output_size = self
             .output_map
             .borrow()
-            .find_by_name(crate::winit::OUTPUT_NAME)
+            .find_by_name(output_name)
             .map(|o| o.size())
             .unwrap();
+
         let pos = evt.position_transformed(output_size);
         self.pointer_location = pos;
         let serial = SCOUNTER.next_serial();
@@ -222,11 +246,6 @@ impl AnvilState<UdevData> {
     pub fn process_input_event<B: InputBackend>(&mut self, event: InputEvent<B>) {
         match event {
             InputEvent::Keyboard { event, .. } => match self.keyboard_key_to_action::<B>(event) {
-                KeyAction::None => {}
-                KeyAction::Quit => {
-                    info!(self.log, "Quitting.");
-                    self.running.store(false, Ordering::SeqCst);
-                }
                 #[cfg(feature = "udev")]
                 KeyAction::VtSwitch(vt) => {
                     info!(self.log, "Trying to switch to vt {}", vt);
@@ -234,16 +253,6 @@ impl AnvilState<UdevData> {
                         error!(self.log, "Error switching to vt {}: {}", vt, err);
                     }
                 }
-                KeyAction::Run(cmd) => {
-                    info!(self.log, "Starting program"; "cmd" => cmd.clone());
-                    if let Err(e) = Command::new(&cmd).spawn() {
-                        error!(self.log,
-                            "Failed to start program";
-                            "cmd" => cmd,
-                            "err" => format!("{:?}", e)
-                        );
-                    }
-                }
                 KeyAction::Screen(num) => {
                     let geometry = self.output_map.borrow().find_by_index(num).map(|o| o.geometry());
 
@@ -300,6 +309,14 @@ impl AnvilState<UdevData> {
                             .motion(self.pointer_location, under, SCOUNTER.next_serial(), 0);
                     }
                 }
+
+                action => match action {
+                    KeyAction::None | KeyAction::Quit | KeyAction::Run(_) => {
+                        self.process_common_key_action(action)
+                    }
+
+                    _ => unreachable!(),
+                },
             },
             InputEvent::PointerMotion { event, .. } => self.on_pointer_move::<B>(event),
             InputEvent::PointerButton { event, .. } => self.on_pointer_button::<B>(event),
@@ -486,87 +503,6 @@ impl AnvilState<UdevData> {
     }
 }
 
-#[cfg(feature = "x11")]
-impl AnvilState<X11Data> {
-    pub fn process_input_event<B: InputBackend>(&mut self, event: InputEvent<B>) {
-        match event {
-            InputEvent::Keyboard { event } => match self.keyboard_key_to_action::<B>(event) {
-                KeyAction::None => (),
-
-                KeyAction::Quit => {
-                    info!(self.log, "Quitting.");
-                    self.running.store(false, Ordering::SeqCst);
-                }
-
-                KeyAction::Run(cmd) => {
-                    info!(self.log, "Starting program"; "cmd" => cmd.clone());
-
-                    if let Err(e) = Command::new(&cmd).spawn() {
-                        error!(self.log,
-                            "Failed to start program";
-                            "cmd" => cmd,
-                            "err" => format!("{:?}", e)
-                        );
-                    }
-                }
-
-                KeyAction::ScaleUp => {
-                    let current_scale = {
-                        self.output_map
-                            .borrow()
-                            .find_by_name(crate::x11::OUTPUT_NAME)
-                            .map(|o| o.scale())
-                            .unwrap_or(1.0)
-                    };
-
-                    self.output_map
-                        .borrow_mut()
-                        .update_scale_by_name(current_scale + 0.25f32, crate::x11::OUTPUT_NAME);
-                }
-
-                KeyAction::ScaleDown => {
-                    let current_scale = {
-                        self.output_map
-                            .borrow()
-                            .find_by_name(crate::x11::OUTPUT_NAME)
-                            .map(|o| o.scale())
-                            .unwrap_or(1.0)
-                    };
-
-                    self.output_map.borrow_mut().update_scale_by_name(
-                        f32::max(1.0f32, current_scale + 0.25f32),
-                        crate::x11::OUTPUT_NAME,
-                    );
-                }
-
-                action => {
-                    warn!(self.log, "Key action {:?} unsupported on x11 backend.", action);
-                }
-            },
-
-            InputEvent::PointerMotionAbsolute { event } => self.on_pointer_move_absolute::<B>(event),
-            InputEvent::PointerButton { event } => self.on_pointer_button::<B>(event),
-            InputEvent::PointerAxis { event } => self.on_pointer_axis::<B>(event),
-            _ => (), // other events are not handled in anvil (yet)
-        }
-    }
-
-    fn on_pointer_move_absolute<B: InputBackend>(&mut self, evt: B::PointerMotionAbsoluteEvent) {
-        let output_size = self
-            .output_map
-            .borrow()
-            .find_by_name(crate::x11::OUTPUT_NAME)
-            .map(|o| o.size())
-            .unwrap();
-
-        let pos = evt.position_transformed(output_size);
-        self.pointer_location = pos;
-        let serial = SCOUNTER.next_serial();
-        let under = self.window_map.borrow().get_surface_under(pos);
-        self.pointer.motion(pos, under, serial, evt.time());
-    }
-}
-
 /// Possible results of a keyboard action
 #[derive(Debug)]
 enum KeyAction {

anvil/src/winit.rs

@@ -132,16 +132,16 @@ pub fn run_winit(log: Logger) {
                             size,
                             refresh: 60_000,
                         },
-                        crate::winit::OUTPUT_NAME,
+                        OUTPUT_NAME,
                     );
 
                     let output_mut = state.output_map.borrow();
-                    let output = output_mut.find_by_name(crate::winit::OUTPUT_NAME).unwrap();
+                    let output = output_mut.find_by_name(OUTPUT_NAME).unwrap();
 
                     state.window_map.borrow_mut().layers.arange_layers(output);
                 }
 
-                WinitEvent::Input(event) => state.process_input_event(event),
+                WinitEvent::Input(event) => state.process_input_event_windowed(event, OUTPUT_NAME),
 
                 _ => (),
             })

anvil/src/x11.rs

@@ -164,7 +164,7 @@ pub fn run_x11(log: Logger) {
                 state.backend_data.render = true;
             }
 
-            X11Event::Input(event) => state.process_input_event(event),
+            X11Event::Input(event) => state.process_input_event_windowed(event, OUTPUT_NAME),
         })
         .expect("Failed to insert X11 Backend into event loop");
 

src/backend/drm/surface/gbm.rs

@@ -62,16 +62,21 @@ where
         // Once we have proper color management and possibly HDR support,
         // we need to have a more sophisticated picker.
         // (Or maybe just pick ARGB2101010, if available, we will see.)
-        let code = Fourcc::Argb8888;
+        let mut code = Fourcc::Argb8888;
         let logger = crate::slog_or_fallback(log).new(o!("backend" => "drm_render"));
 
         // select a format
-        let plane_formats = drm
+        let mut plane_formats = drm
             .supported_formats(drm.plane())?
             .iter()
-            .filter(|fmt| fmt.code == code)
             .cloned()
             .collect::<HashSet<_>>();
+
+        // try non alpha variant if not available
+        if !plane_formats.iter().any(|fmt| fmt.code == code) {
+            code = Fourcc::Xrgb8888;
+        }
+        plane_formats.retain(|fmt| fmt.code == code);
         renderer_formats.retain(|fmt| fmt.code == code);
 
         trace!(logger, "Plane formats: {:?}", plane_formats);

src/backend/renderer/gles2/mod.rs

@@ -11,12 +11,12 @@ use std::sync::{
 };
 use std::{collections::HashSet, os::raw::c_char};
 
-use cgmath::{prelude::*, Matrix3, Vector2};
+use cgmath::{prelude::*, Matrix3, Vector2, Vector3};
 
 mod shaders;
 mod version;
 
-use super::{Bind, Frame, Renderer, Texture, Transform, Unbind};
+use super::{Bind, Frame, Renderer, Texture, TextureFilter, Transform, Unbind};
 use crate::backend::allocator::{
     dmabuf::{Dmabuf, WeakDmabuf},
     Format,
@@ -26,7 +26,7 @@ use crate::backend::egl::{
     EGLContext, EGLSurface, MakeCurrentError,
 };
 use crate::backend::SwapBuffersError;
-use crate::utils::{Buffer, Physical, Size};
+use crate::utils::{Buffer, Physical, Rectangle, Size};
 
 #[cfg(all(feature = "wayland_frontend", feature = "use_system_lib"))]
 use super::ImportEgl;
@@ -35,8 +35,6 @@ use super::{ImportDma, ImportShm};
 #[cfg(all(feature = "wayland_frontend", feature = "use_system_lib"))]
 use crate::backend::egl::{display::EGLBufferReader, Format as EGLFormat};
 #[cfg(feature = "wayland_frontend")]
-use crate::utils::Rectangle;
-#[cfg(feature = "wayland_frontend")]
 use wayland_server::protocol::{wl_buffer, wl_shm};
 
 use slog::{debug, error, info, o, trace, warn};
@@ -420,6 +418,7 @@ impl Gles2Renderer {
     /// - This renderer has no default framebuffer, use `Bind::bind` before rendering.
     /// - Binding a new target, while another one is already bound, will replace the current target.
     /// - Shm buffers can be released after a successful import, without the texture handle becoming invalid.
+    /// - Texture filtering starts with Nearest-downscaling and Linear-upscaling
     pub unsafe fn new<L>(context: EGLContext, logger: L) -> Result<Gles2Renderer, Gles2Error>
     where
         L: Into<Option<::slog::Logger>>,
@@ -495,7 +494,7 @@ impl Gles2Renderer {
         ];
 
         let (tx, rx) = channel();
-        let renderer = Gles2Renderer {
+        let mut renderer = Gles2Renderer {
             id: RENDERER_COUNTER.fetch_add(1, Ordering::SeqCst),
             gl,
             egl: context,
@@ -514,6 +513,8 @@ impl Gles2Renderer {
             logger: log,
             _not_send: std::ptr::null_mut(),
         };
+        renderer.downscale_filter(TextureFilter::Nearest)?;
+        renderer.upscale_filter(TextureFilter::Linear)?;
         renderer.egl.unbind()?;
         Ok(renderer)
     }
@@ -1007,6 +1008,35 @@ impl Renderer for Gles2Renderer {
     type TextureId = Gles2Texture;
     type Frame = Gles2Frame;
 
+    fn downscale_filter(&mut self, filter: TextureFilter) -> Result<(), Self::Error> {
+        self.make_current()?;
+        unsafe {
+            self.gl.TexParameteri(
+                ffi::TEXTURE_2D,
+                ffi::TEXTURE_MIN_FILTER,
+                match filter {
+                    TextureFilter::Nearest => ffi::NEAREST as i32,
+                    TextureFilter::Linear => ffi::LINEAR as i32,
+                },
+            );
+        }
+        Ok(())
+    }
+    fn upscale_filter(&mut self, filter: TextureFilter) -> Result<(), Self::Error> {
+        self.make_current()?;
+        unsafe {
+            self.gl.TexParameteri(
+                ffi::TEXTURE_2D,
+                ffi::TEXTURE_MAG_FILTER,
+                match filter {
+                    TextureFilter::Nearest => ffi::NEAREST as i32,
+                    TextureFilter::Linear => ffi::LINEAR as i32,
+                },
+            );
+        }
+        Ok(())
+    }
+
     fn render<F, R>(
         &mut self,
         size: Size<i32, Physical>,
@@ -1100,13 +1130,60 @@ impl Frame for Gles2Frame {
         Ok(())
     }
 
-    fn render_texture(
+    fn render_texture_from_to(
         &mut self,
-        tex: &Self::TextureId,
+        texture: &Self::TextureId,
+        src: Rectangle<i32, Buffer>,
+        dest: Rectangle<f64, Physical>,
+        transform: Transform,
+        alpha: f32,
+    ) -> Result<(), Self::Error> {
+        let mut mat = Matrix3::<f32>::identity();
+
+        // position and scale
+        mat = mat * Matrix3::from_translation(Vector2::new(dest.loc.x as f32, dest.loc.y as f32));
+        mat = mat * Matrix3::from_nonuniform_scale(dest.size.w as f32, dest.size.h as f32);
+
+        //apply surface transformation
+        mat = mat * Matrix3::from_translation(Vector2::new(0.5, 0.5));
+        if transform == Transform::Normal {
+            assert_eq!(mat, mat * transform.invert().matrix());
+            assert_eq!(transform.matrix(), Matrix3::<f32>::identity());
+        }
+        mat = mat * transform.invert().matrix();
+        mat = mat * Matrix3::from_translation(Vector2::new(-0.5, -0.5));
+
+        // this matrix should be regular, we can expect invert to succeed
+        let tex_size = texture.size();
+        let texture_mat = Matrix3::from_nonuniform_scale(tex_size.w as f32, tex_size.h as f32)
+            .invert()
+            .unwrap();
+        let verts = [
+            (texture_mat * Vector3::new((src.loc.x + src.size.w) as f32, src.loc.y as f32, 0.0)).truncate(), // top-right
+            (texture_mat * Vector3::new(src.loc.x as f32, src.loc.y as f32, 0.0)).truncate(), // top-left
+            (texture_mat
+                * Vector3::new(
+                    (src.loc.x + src.size.w) as f32,
+                    (src.loc.y + src.size.h) as f32,
+                    0.0,
+                ))
+            .truncate(), // bottom-right
+            (texture_mat * Vector3::new(src.loc.x as f32, (src.loc.y + src.size.h) as f32, 0.0)).truncate(), // bottom-left
+        ];
+        self.render_texture(texture, mat, verts, alpha)
+    }
+}
+
+impl Gles2Frame {
+    /// Render a texture to the current target using given projection matrix and alpha.
+    /// The given vertices are used to source the texture. This is mostly useful for cropping the texture.    
+    pub fn render_texture(
+        &mut self,
+        tex: &Gles2Texture,
         mut matrix: Matrix3<f32>,
         tex_coords: [Vector2<f32>; 4],
         alpha: f32,
-    ) -> Result<(), Self::Error> {
+    ) -> Result<(), Gles2Error> {
         //apply output transformation
         matrix = self.current_projection * matrix;
 

src/backend/renderer/mod.rs

@@ -14,7 +14,7 @@ use crate::utils::{Buffer, Physical, Point, Rectangle, Size};
 
 #[cfg(feature = "wayland_frontend")]
 use crate::wayland::compositor::SurfaceData;
-use cgmath::{prelude::*, Matrix3, Vector2, Vector3};
+use cgmath::Matrix3;
 #[cfg(feature = "wayland_frontend")]
 use wayland_server::protocol::{wl_buffer, wl_shm};
 
@@ -53,6 +53,15 @@ pub enum Transform {
     Flipped270,
 }
 
+#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy)]
+/// Texture filtering methods
+pub enum TextureFilter {
+    /// Returns the value of the texture element that is nearest (in Manhattan distance) to the center of the pixel being textured.
+    Linear,
+    /// Returns the weighted average of the four texture elements that are closest to the center of the pixel being textured.
+    Nearest,
+}
+
 impl Transform {
     /// A projection matrix to apply this transformation
     pub fn matrix(&self) -> Matrix3<f32> {
@@ -163,25 +172,17 @@ pub trait Frame {
     /// This operation is only valid in between a `begin` and `finish`-call.
     /// If called outside this operation may error-out, do nothing or modify future rendering results in any way.
     fn clear(&mut self, color: [f32; 4]) -> Result<(), Self::Error>;
-    /// Render a texture to the current target using given projection matrix and alpha.
-    /// The given vertices are used to source the texture. This is mostly useful for cropping the texture.
-    fn render_texture(
-        &mut self,
-        texture: &Self::TextureId,
-        matrix: Matrix3<f32>,
-        tex_coords: [Vector2<f32>; 4],
-        alpha: f32,
-    ) -> Result<(), Self::Error>;
 
     /// Render a texture to the current target as a flat 2d-plane at a given
     /// position and applying the given transformation with the given alpha value.
+    /// (Meaning `src_transform` should match the orientation of surface being rendered).
     fn render_texture_at(
         &mut self,
         texture: &Self::TextureId,
         pos: Point<f64, Physical>,
         texture_scale: i32,
         output_scale: f64,
-        transform: Transform,
+        src_transform: Transform,
         alpha: f32,
     ) -> Result<(), Self::Error> {
         self.render_texture_from_to(
@@ -195,55 +196,22 @@ pub trait Frame {
                     .to_f64()
                     .to_physical(output_scale),
             ),
-            transform,
+            src_transform,
             alpha,
         )
     }
 
-    /// Render part of a texture as given by src to the current target into the rectangle described by dest
+    /// Render part of a texture as given by src to the current target into the rectangle described by dst
-    /// as a flat 2d-plane after applying the given transformations.
+    /// as a flat 2d-plane after applying the inverse of the given transformation.
+    /// (Meaning `src_transform` should match the orientation of surface being rendered).
     fn render_texture_from_to(
         &mut self,
         texture: &Self::TextureId,
         src: Rectangle<i32, Buffer>,
-        dest: Rectangle<f64, Physical>,
+        dst: Rectangle<f64, Physical>,
-        transform: Transform,
+        src_transform: Transform,
         alpha: f32,
-    ) -> Result<(), Self::Error> {
+    ) -> Result<(), Self::Error>;
-        let mut mat = Matrix3::<f32>::identity();
-
-        // position and scale
-        mat = mat * Matrix3::from_translation(Vector2::new(dest.loc.x as f32, dest.loc.y as f32));
-        mat = mat * Matrix3::from_nonuniform_scale(dest.size.w as f32, dest.size.h as f32);
-
-        //apply surface transformation
-        mat = mat * Matrix3::from_translation(Vector2::new(0.5, 0.5));
-        if transform == Transform::Normal {
-            assert_eq!(mat, mat * transform.invert().matrix());
-            assert_eq!(transform.matrix(), Matrix3::<f32>::identity());
-        }
-        mat = mat * transform.invert().matrix();
-        mat = mat * Matrix3::from_translation(Vector2::new(-0.5, -0.5));
-
-        // this matrix should be regular, we can expect invert to succeed
-        let tex_size = texture.size();
-        let texture_mat = Matrix3::from_nonuniform_scale(tex_size.w as f32, tex_size.h as f32)
-            .invert()
-            .unwrap();
-        let verts = [
-            (texture_mat * Vector3::new((src.loc.x + src.size.w) as f32, src.loc.y as f32, 0.0)).truncate(), // top-right
-            (texture_mat * Vector3::new(src.loc.x as f32, src.loc.y as f32, 0.0)).truncate(), // top-left
-            (texture_mat
-                * Vector3::new(
-                    (src.loc.x + src.size.w) as f32,
-                    (src.loc.y + src.size.h) as f32,
-                    0.0,
-                ))
-            .truncate(), // bottom-right
-            (texture_mat * Vector3::new(src.loc.x as f32, (src.loc.y + src.size.h) as f32, 0.0)).truncate(), // bottom-left
-        ];
-        self.render_texture(texture, mat, verts, alpha)
-    }
 }
 
 /// Abstraction of commonly used rendering operations for compositors.
@@ -255,6 +223,11 @@ pub trait Renderer {
     /// Type representing a currently in-progress frame during the [`Renderer::render`]-call
     type Frame: Frame<Error = Self::Error, TextureId = Self::TextureId>;
 
+    /// Set the filter method to be used when rendering a texture into a smaller area than its size
+    fn downscale_filter(&mut self, filter: TextureFilter) -> Result<(), Self::Error>;
+    /// Set the filter method to be used when rendering a texture into a larger area than its size
+    fn upscale_filter(&mut self, filter: TextureFilter) -> Result<(), Self::Error>;
+
     /// Initialize a rendering context on the current rendering target with given dimensions and transformation.
     ///
     /// This function *may* error, if:
@@ -265,7 +238,7 @@ pub trait Renderer {
     fn render<F, R>(
         &mut self,
         size: Size<i32, Physical>,
-        transform: Transform,
+        dst_transform: Transform,
         rendering: F,
     ) -> Result<R, Self::Error>
     where

src/backend/x11/buffer.rs

@@ -129,7 +129,7 @@ where
         }
 
         // We need dri3 >= 1.2 in order to use the enhanced dri3_pixmap_from_buffers function.
-        let xid = if window_inner.extensions.dri3 >= (1, 2) {
+        let xid = if window_inner.extensions.dri3 >= Some((1, 2)) {
             if dmabuf.num_planes() > 4 {
                 return Err(CreatePixmapError::TooManyPlanes);
             }

src/backend/x11/extension.rs

@@ -25,6 +25,7 @@ macro_rules! extensions {
         $(
             $extension:ident { // Extension name for path lookup
                 $extension_fn:ident, // Function used to look up the version of the extension
+                required: $required:expr,
                 minimum: ($min_major:expr, $min_minor:expr),
                 request: ($req_major:expr, $req_minor:expr),
             },
@@ -34,7 +35,7 @@ macro_rules! extensions {
         pub struct Extensions {
             $(
                 #[doc = concat!(" The version of the `", stringify!($extension), "` extension.")]
-                pub $extension: (u32, u32),
+                pub $extension: Option<(u32, u32)>,
             )*
         }
 
@@ -59,11 +60,12 @@ macro_rules! extensions {
                                     version.minor_version,
                                 );
 
-                                (version.major_version, version.minor_version)
+                                Some((version.major_version, version.minor_version))
                             } else {
+                                if $required {
                                     slog::error!(
                                         logger,
-                                    "{} extension version is too low (have {}.{}, expected {}.{})",
+                                        "required extension {} version is too low (have {}.{}, expected {}.{})",
                                         X11_EXTENSION_NAME,
                                         version.major_version,
                                         version.minor_version,
@@ -78,9 +80,13 @@ macro_rules! extensions {
                                         available_major: version.major_version,
                                         available_minor: version.minor_version,
                                     }.into());
+                                } else {
+                                    None
+                                }
                             }
                         } else {
-                            slog::error!(logger, "{} extension not found", X11_EXTENSION_NAME);
+                            if $required {
+                                slog::error!(logger, "required extension {} not found", X11_EXTENSION_NAME);
 
                                 return Err(MissingExtensionError::NotFound {
                                     name: X11_EXTENSION_NAME,
@@ -88,6 +94,9 @@ macro_rules! extensions {
                                     minor: $min_minor,
                                 }
                                 .into());
+                            } else {
+                                None
+                            }
                         }
                     };
                 )*
@@ -105,18 +114,21 @@ macro_rules! extensions {
 extensions! {
     present {
         present_query_version,
+        required: true,
         minimum: (1, 0),
         request: (1, 0),
     },
 
     xfixes {
         xfixes_query_version,
+        required: true,
         minimum: (4, 0),
         request: (4, 0),
     },
 
     dri3 {
         dri3_query_version,
+        required: true,
         minimum: (1, 0),
         request: (1, 2),
     },

src/lib.rs

@@ -4,7 +4,7 @@
 
 //! # Smithay: the Wayland compositor smithy
 //!
-//! This crate is a general framework for build wayland compositors. It currently focuses on low-level,
+//! This crate is a general framework for building wayland compositors. It currently focuses on low-level,
 //! helpers and abstractions, handling most of the system-level and wayland protocol interactions.
 //! The window management and drawing logic is however at the time not provided (but helpers for this
 //! are planned for future version).

src/utils/geometry.rs

@@ -18,7 +18,7 @@ pub struct Buffer;
 pub struct Raw;
 
 pub trait Coordinate:
-    Sized + Add<Self, Output = Self> + Sub<Self, Output = Self> + PartialOrd + Default + Copy + std::fmt::Debug
+    Sized + Add<Self, Output = Self> + Sub<Self, Output = Self> + PartialOrd + Default + Copy + fmt::Debug
 {
     fn downscale(self, scale: Self) -> Self;
     fn upscale(self, scale: Self) -> Self;
@@ -637,6 +637,21 @@ impl<N: AddAssign, Kind> AddAssign for Size<N, Kind> {
     }
 }
 
+impl<N: SubAssign + fmt::Debug + PartialOrd, Kind> SubAssign for Size<N, Kind> {
+    #[inline]
+    fn sub_assign(&mut self, rhs: Self) {
+        debug_assert!(
+            self.w >= rhs.w && self.h >= rhs.h,
+            "Attempting to subtract bigger from smaller size: {:?} - {:?}",
+            (&self.w, &self.h),
+            (&rhs.w, &rhs.h),
+        );
+
+        self.w -= rhs.w;
+        self.h -= rhs.h
+    }
+}
+
 impl<N: Clone, Kind> Clone for Size<N, Kind> {
     #[inline]
     fn clone(&self) -> Self {

src/wayland/shell/xdg/mod.rs

@@ -903,6 +903,11 @@ impl ToplevelSurface {
         self.shell_surface.as_ref().is_alive() && self.wl_surface.as_ref().is_alive()
     }
 
+    /// Supported XDG shell protocol version.
+    pub fn version(&self) -> u32 {
+        self.shell_surface.as_ref().version()
+    }
+
     /// Retrieve the shell client owning this toplevel surface
     ///
     /// Returns `None` if the surface does actually no longer exist.

wlcs_anvil/src/renderer.rs

@@ -1,10 +1,9 @@
 use std::cell::Cell;
 
-use cgmath::Vector2;
 use smithay::{
     backend::{
         allocator::dmabuf::Dmabuf,
-        renderer::{Frame, ImportDma, ImportShm, Renderer, Texture, Transform},
+        renderer::{Frame, ImportDma, ImportShm, Renderer, Texture, TextureFilter, Transform},
         SwapBuffersError,
     },
     reexports::wayland_server::protocol::wl_buffer,
@@ -28,7 +27,7 @@ impl Renderer for DummyRenderer {
     fn render<F, R>(
         &mut self,
         _size: Size<i32, Physical>,
-        _transform: Transform,
+        _dst_transform: Transform,
         rendering: F,
     ) -> Result<R, Self::Error>
     where
@@ -37,6 +36,14 @@ impl Renderer for DummyRenderer {
         let mut frame = DummyFrame {};
         Ok(rendering(self, &mut frame))
     }
+
+    fn upscale_filter(&mut self, _filter: TextureFilter) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn downscale_filter(&mut self, _filter: TextureFilter) -> Result<(), Self::Error> {
+        Ok(())
+    }
 }
 
 impl ImportShm for DummyRenderer {
@@ -94,11 +101,12 @@ impl Frame for DummyFrame {
         Ok(())
     }
 
-    fn render_texture(
+    fn render_texture_from_to(
         &mut self,
         _texture: &Self::TextureId,
-        _matrix: cgmath::Matrix3<f32>,
+        _src: Rectangle<i32, Buffer>,
-        _tex_coords: [Vector2<f32>; 4],
+        _dst: Rectangle<f64, Physical>,
+        _src_transform: Transform,
         _alpha: f32,
     ) -> Result<(), Self::Error> {
         Ok(())