From 8efff459c4055960eedc385e39cd14fd51b1305c Mon Sep 17 00:00:00 2001
From: lifning <>
Date: Fri, 10 Dec 2021 00:53:07 -0800
Subject: [PATCH] integer scaling

---
 ferretro_components/src/provided/sdl2/canvas.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/ferretro_components/src/provided/sdl2/canvas.rs b/ferretro_components/src/provided/sdl2/canvas.rs
index 0309875..bdbf16c 100644
--- a/ferretro_components/src/provided/sdl2/canvas.rs
+++ b/ferretro_components/src/provided/sdl2/canvas.rs
@@ -9,9 +9,19 @@ use sdl2::render::WindowCanvas;
 
 pub(crate) fn paint_frame_on_canvas(frame: &VideoFrame, canvas: &mut WindowCanvas) -> bool {
     if let Some((pixel_data, pitch)) = frame.data_pitch_as_bytes() {
+        let (cw, ch) = canvas.output_size().unwrap();
         let (width, height) = frame.dimensions();
         let pixel_format = frame.pixel_format().map(sdl2_pixfmt);
 
+        let should_intscale = if cw >= width && ch >= height {
+            sdl2::sys::SDL_bool::SDL_TRUE
+        } else {
+            sdl2::sys::SDL_bool::SDL_FALSE
+        };
+        unsafe {
+            sdl2::sys::SDL_RenderSetIntegerScale(canvas.raw(), should_intscale);
+        }
+
         if let Ok(mut tex) = canvas
             .texture_creator()
             .create_texture_static(pixel_format, width, height)