graphics/vesad: Remove old resizing code

Graphics clients will need to handle resizing themself anyway for
handoff between graphics drivers and as such don't need the graphics
to modify the framebuffer during resize.

graphics/vesad/src/framebuffer.rs

@@ -1,7 +1,5 @@
 use std::ptr;
 
-use syscall::PAGE_SIZE;
-
 pub struct FrameBuffer {
     pub onscreen: *mut [u32],
     pub phys: usize,
@@ -58,36 +56,4 @@ impl FrameBuffer {
         let stride = parse_number(parts.next()?)?;
         Some(Self::new(phys, width, height, stride))
     }
-
-    pub unsafe fn resize(&mut self, width: usize, height: usize, stride: usize) {
-        // Unmap old onscreen
-        unsafe {
-            let slice = self.onscreen;
-            libredox::call::munmap(slice.cast(), (slice.len() * 4).next_multiple_of(PAGE_SIZE))
-                .expect("vesad: failed to unmap framebuffer");
-        }
-
-        // Map new onscreen
-        self.onscreen = unsafe {
-            let size = stride * height;
-            let onscreen_ptr = common::physmap(
-                self.phys,
-                size * 4,
-                common::Prot {
-                    read: true,
-                    write: true,
-                },
-                common::MemoryType::WriteCombining,
-            )
-            .expect("vesad: failed to map framebuffer") as *mut u32;
-            ptr::write_bytes(onscreen_ptr, 0, size);
-
-            ptr::slice_from_raw_parts_mut(onscreen_ptr, size)
-        };
-
-        // Update size
-        self.width = width;
-        self.height = height;
-        self.stride = stride;
-    }
 }

graphics/vesad/src/screen.rs

@@ -1,5 +1,5 @@
 use std::convert::TryInto;
-use std::{cmp, ptr};
+use std::ptr;
 
 use driver_graphics::Resource;
 use inputd::Damage;
@@ -34,51 +34,6 @@ impl Resource for GraphicScreen {
 }
 
 impl GraphicScreen {
-    pub fn resize(&mut self, width: usize, height: usize) {
-        //TODO: Fix issue with mapped screens
-
-        if width != self.width || height != self.height {
-            println!("Resize display to {}, {}", width, height);
-
-            let size = width * height;
-            let mut offscreen = OffscreenBuffer::new(size);
-
-            let mut old_ptr = self.offscreen.as_ptr();
-            let mut new_ptr = offscreen.as_mut_ptr();
-
-            for _y in 0..cmp::min(height, self.height) {
-                unsafe {
-                    ptr::copy(old_ptr, new_ptr, cmp::min(width, self.width));
-                    if width > self.width {
-                        ptr::write_bytes(
-                            new_ptr.offset(self.width as isize),
-                            0,
-                            width - self.width,
-                        );
-                    }
-                    old_ptr = old_ptr.offset(self.width as isize);
-                    new_ptr = new_ptr.offset(width as isize);
-                }
-            }
-
-            if height > self.height {
-                for _y in self.height..height {
-                    unsafe {
-                        ptr::write_bytes(new_ptr, 0, width);
-                        new_ptr = new_ptr.offset(width as isize);
-                    }
-                }
-            }
-
-            self.width = width;
-            self.height = height;
-
-            self.offscreen = offscreen;
-        } else {
-            println!("Display is already {}, {}", width, height);
-        };
-    }
-
     pub fn sync(&self, framebuffer: &mut FrameBuffer, sync_rects: &[Damage]) {
         for sync_rect in sync_rects {
             let sync_rect = sync_rect.clip(