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Don't redraw static frame

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This commit is contained in:
Jonathan Turner 2019-07-14 19:54:30 +12:00
parent a3f628427f
commit 1a36f47bcb
1 changed files with 19 additions and 8 deletions
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27
src/plugins/binaryview.rs
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@ -55,7 +55,8 @@ fn view_binary(b: &[u8]) -> Result<(), Box<dyn std::error::Error>> {
pub struct Context { pub struct Context {
pub width: usize, pub width: usize,
pub height: usize, pub height: usize,
pub frame_buffer: Vec<(char, (u8, u8, u8))>, pub frame_buffer: Vec<(u8, u8, u8)>,
pub prev_frame_buffer: Option<Vec<(u8, u8, u8)>>,
pub since_last_button: Vec<usize>, pub since_last_button: Vec<usize>,
} }
@ -65,16 +66,24 @@ impl Context {
width: 0, width: 0,
height: 0, height: 0,
frame_buffer: vec![], frame_buffer: vec![],
prev_frame_buffer: None,
since_last_button: vec![0; 8], since_last_button: vec![0; 8],
} }
} }
pub fn clear(&mut self) { pub fn clear(&mut self) {
self.frame_buffer = vec![(' ', (0, 0, 0)); self.width * self.height as usize]; self.frame_buffer = vec![(0, 0, 0); self.width * self.height as usize];
} }
pub fn flush(&self) -> Result<(), Box<dyn std::error::Error>> { pub fn flush(&mut self) -> Result<(), Box<dyn std::error::Error>> {
let cursor = cursor(); let cursor = cursor();
cursor.goto(0, 0)?; cursor.goto(0, 0)?;
// check if we should redraw
if let Some(ref prev) = self.prev_frame_buffer {
if self.frame_buffer == *prev {
return Ok(());
}
}
let mut prev_fg: Option<(u8, u8, u8)> = None; let mut prev_fg: Option<(u8, u8, u8)> = None;
let mut prev_bg: Option<(u8, u8, u8)> = None; let mut prev_bg: Option<(u8, u8, u8)> = None;
let mut prev_count = 1; let mut prev_count = 1;
@ -82,8 +91,8 @@ impl Context {
let mut pos = 0; let mut pos = 0;
let fb_len = self.frame_buffer.len(); let fb_len = self.frame_buffer.len();
while pos < (fb_len - self.width) { while pos < (fb_len - self.width) {
let top_pixel = self.frame_buffer[pos].1; let top_pixel = self.frame_buffer[pos];
let bottom_pixel = self.frame_buffer[pos + self.width].1; let bottom_pixel = self.frame_buffer[pos + self.width];
match (prev_fg, prev_bg) { match (prev_fg, prev_bg) {
(Some(c), Some(d)) if c == top_pixel && d == bottom_pixel => { (Some(c), Some(d)) if c == top_pixel && d == bottom_pixel => {
@ -124,6 +133,8 @@ impl Context {
_ => {} _ => {}
} }
} }
self.prev_frame_buffer = Some(self.frame_buffer.clone());
/* /*
for pixel in &self.frame_buffer { for pixel in &self.frame_buffer {
match prev_color { match prev_color {
@ -262,7 +273,7 @@ pub fn view_contents(buffer: &[u8]) -> Result<(), Box<dyn std::error::Error>> {
use image::Pixel; use image::Pixel;
let rgb = pixel.to_rgb(); let rgb = pixel.to_rgb();
//print!("{}", rgb[0]); //print!("{}", rgb[0]);
context.frame_buffer[count] = ('@', (rgb[0], rgb[1], rgb[2])); context.frame_buffer[count] = (rgb[0], rgb[1], rgb[2]);
count += 1; count += 1;
} }
} }
@ -286,7 +297,7 @@ pub fn view_contents(buffer: &[u8]) -> Result<(), Box<dyn std::error::Error>> {
use image::Pixel; use image::Pixel;
let rgb = pixel.to_rgb(); let rgb = pixel.to_rgb();
//print!("{}", rgb[0]); //print!("{}", rgb[0]);
context.frame_buffer[count] = ('@', (rgb[0], rgb[1], rgb[2])); context.frame_buffer[count] = (rgb[0], rgb[1], rgb[2]);
count += 1; count += 1;
} }
} }
@ -359,7 +370,7 @@ pub fn view_contents_interactive(buffer: &[u8]) -> Result<(), Box<dyn std::error
use image::Pixel; use image::Pixel;
let rgb = pixel.to_rgb(); let rgb = pixel.to_rgb();
context.frame_buffer[count] = ('@', (rgb[0], rgb[1], rgb[2])); context.frame_buffer[count] = (rgb[0], rgb[1], rgb[2]);
count += 1; count += 1;
} }
context.flush()?; context.flush()?;