From 6df6ae407c7cb7461ff85ade92859db494893bdf Mon Sep 17 00:00:00 2001
From: Anders Jenbo <anders@jenbo.dk>
Date: Mon, 7 Jul 2025 02:43:25 +0200
Subject: [PATCH] Fix transition on software rendere (#543)

---
 miniwin/src/d3drm/backends/software/renderer.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/miniwin/src/d3drm/backends/software/renderer.cpp b/miniwin/src/d3drm/backends/software/renderer.cpp
index 48c9c3ef..93a80a2e 100644
--- a/miniwin/src/d3drm/backends/software/renderer.cpp
+++ b/miniwin/src/d3drm/backends/software/renderer.cpp
@@ -800,9 +800,17 @@ void Direct3DRMSoftwareRenderer::Draw2DImage(
 		return;
 	}
 
+	bool isUpscaling = centeredRect.w > srcRect.w || centeredRect.h > srcRect.h;
+
 	SDL_Surface* surface = m_textures[textureId].cached;
 	SDL_UnlockSurface(surface);
-	SDL_BlitSurfaceScaled(surface, &srcRect, m_renderedImage, &centeredRect, SDL_SCALEMODE_LINEAR);
+	SDL_BlitSurfaceScaled(
+		surface,
+		&srcRect,
+		m_renderedImage,
+		&centeredRect,
+		isUpscaling ? SDL_SCALEMODE_NEAREST : SDL_SCALEMODE_LINEAR
+	);
 	SDL_LockSurface(surface);
 }