adjust the tv output image size according to the current snes resolution

snes-frontend/src/emu_ui/debug/ppu_graphics.rs

@@ -223,7 +223,7 @@ fn paint_texture(ui: &mut Ui, texture: &mut Option<TextureHandle>, framebuffer:
     if let Some(txt) = texture {
         txt.set(
             ColorImage::from_rgba_premultiplied([width, height], framebuffer),
-            TextureOptions::default(),
+            TextureOptions::LINEAR,
         );
         let (whole_rect, _) =
             ui.allocate_exact_size(Vec2::from([(width * 2) as f32, (height * 2) as f32]), egui::Sense::focusable_noninteractive());

snes-frontend/src/emu_ui/game.rs

@@ -1,4 +1,4 @@
-use eframe::egui;
+use eframe::egui::{self, Pos2, Rect};
 use eframe::{egui::Context, epaint::ColorImage};
 use eframe::egui::{TextureOptions, Ui};
 use eframe::epaint::{Vec2, TextureHandle};
@@ -12,11 +12,12 @@ pub fn build_game_window(
     ctx: &egui::Context,
     game_tv_texture: &mut Option<TextureHandle>,
     framebuffer: &[u8],
+    current_res: (u16, u16),
 ) {
     egui::Window::new("TV")
         .collapsible(false)
         .show(ctx, |ui| {
-            paint_game_texture(ui, game_tv_texture, framebuffer);
+            paint_game_texture(ui, game_tv_texture, framebuffer, current_res);
         });
 }
 
@@ -33,21 +34,34 @@ pub fn initialize_game_texture(ctx: &Context, game_tv_texture: &mut Option<Textu
     }
 }
 
-fn paint_game_texture(ui: &mut Ui, texture: &mut Option<TextureHandle>, framebuffer: &[u8]) {
+fn paint_game_texture(ui: &mut Ui, texture: &mut Option<TextureHandle>, framebuffer: &[u8], current_res: (u16, u16)) {
     if let Some(txt) = texture {
         txt.set(
             ColorImage::from_rgba_premultiplied([MAX_TV_WIDTH, MAX_TV_HEIGHT], framebuffer),
-            TextureOptions::default(),
+            TextureOptions::LINEAR,
         );
         let (whole_rect, _) =
             ui.allocate_exact_size(
                 Vec2::from([(MAX_TV_WIDTH) as f32, (MAX_TV_HEIGHT) as f32]),
                 egui::Sense::focusable_noninteractive(),
             );
+        let current_resolution_scale = calculate_resolution_scale(current_res);
         egui::Image::new((
             txt.id(),
             txt.size_vec2(),
         ))
+        .texture_options(TextureOptions::LINEAR)
+        .uv(Rect::from_two_pos(
+            Pos2::new(0.0,0.0),
+            Pos2::new(current_resolution_scale.0, current_resolution_scale.1))
+        )
         .paint_at(ui, whole_rect);
     }
 }
+
+fn calculate_resolution_scale(current_res: (u16, u16)) -> (f32, f32) {
+    (
+        current_res.0 as f32 / MAX_TV_WIDTH as f32,
+        current_res.1 as f32 / MAX_TV_HEIGHT as f32,
+    )
+}

snes-frontend/src/main.rs

@@ -30,6 +30,7 @@ impl eframe::App for SnesEmulatorApp {
             ctx,
             &mut self.state.game_tv_texture,
             self.emulator.bus.ppu.framebuffer(),
+            self.emulator.bus.ppu.registers.get_current_res(),
         );
         emu_ui::debug::build_all_debug_options(ctx, &mut self.state.debug_options, &mut self.state.emulation_state, &mut self.emulator);
         if !self.state.emulation_state.is_paused {