From 0503b4061a1b024255c937755c0fd8e43e248d8f Mon Sep 17 00:00:00 2001
From: Kalei Alma <kalei@tuta.io>
Date: Mon, 22 Jul 2024 08:34:05 -0700
Subject: [PATCH] fixed a window rescaling bug

---
 LuaSTG/Core/Graphics/SwapChain_OpenGL.cpp | 13 ++++++-------
 LuaSTG/Core/Graphics/Window_SDL.cpp       |  5 ++++-
 LuaSTG/Core/Graphics/Window_SDL.hpp       |  1 -
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/LuaSTG/Core/Graphics/SwapChain_OpenGL.cpp b/LuaSTG/Core/Graphics/SwapChain_OpenGL.cpp
index 3a4e110..c00b211 100644
--- a/LuaSTG/Core/Graphics/SwapChain_OpenGL.cpp
+++ b/LuaSTG/Core/Graphics/SwapChain_OpenGL.cpp
@@ -368,33 +368,32 @@ namespace Core::Graphics
 	bool SwapChain_OpenGL::present()
 	{
 		Vector2U wsize = m_window->getSize();
-		Core::Vector2F scale_dim = Core::Vector2F((float) wsize.x / m_canvas_size.x, (float) wsize.y / m_canvas_size.y);
+		Vector2F scale_dim = Vector2F((float) wsize.x / m_canvas_size.x, (float) wsize.y / m_canvas_size.y);
 		float scale = std::min(scale_dim.x, scale_dim.y);
 		Vector2F d;
 
 		if (scale_dim.x > scale_dim.y)
 		{
-			d.x = (wsize.x - scale * m_canvas_size.x) / 2;
+			d.x = ((float)wsize.x - m_canvas_size.x * scale) * 0.5;
 			d.y = 0;
 		}
 		else
 		{
 			d.x = 0;
-			d.y = (wsize.y - scale * m_canvas_size.y) / 2;
+			d.y = ((float)wsize.y - m_canvas_size.y * scale) * 0.5;
 		}
 		
 		glBindFramebuffer(GL_READ_FRAMEBUFFER, rdr_fbo);
 		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+		glViewport(0, 0, wsize.x, wsize.y);
+		glScissor(0, 0, wsize.x, wsize.y);
 		glClearColor(0.f, 0.f, 0.f, 0.f);
 		glClearDepth(1.f);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-		glViewport(0, 0, wsize.x, wsize.y);
-		glScissor(0, 0, wsize.x, wsize.y);
 
 		glBlitFramebuffer(
 			0, 0, m_canvas_size.x, m_canvas_size.y,
-			(wsize.x - scale * (m_canvas_size.x + d.x)) / 2, (wsize.y + scale * (m_canvas_size.y + d.y)) / 2,
-			(wsize.x + scale * (m_canvas_size.x + d.x)) / 2, (wsize.y - scale * (m_canvas_size.y + d.y)) / 2,
+			d.x, scale * m_canvas_size.y + d.y, scale * m_canvas_size.x + d.x, d.y,
 			GL_COLOR_BUFFER_BIT, GL_LINEAR
 		);
 
diff --git a/LuaSTG/Core/Graphics/Window_SDL.cpp b/LuaSTG/Core/Graphics/Window_SDL.cpp
index b19a3b2..bec8875 100644
--- a/LuaSTG/Core/Graphics/Window_SDL.cpp
+++ b/LuaSTG/Core/Graphics/Window_SDL.cpp
@@ -4,7 +4,6 @@
 #include "Core/Type.hpp"
 #include "Core/i18n.hpp"
 #include "SDL_events.h"
-#include "SDL_mouse.h"
 #include "SDL_video.h"
 #include "glad/gl.h"
 #include "SDL.h"
@@ -154,6 +153,9 @@ namespace Core::Graphics
 		int version = gladLoadGL((GLADloadfunc) SDL_GL_GetProcAddress);
 		spdlog::info("[core] OpenGL {}.{}", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version));
 		spdlog::info("[core] {}", (const char*)glGetString(GL_VERSION));
+		GLint s;
+		glGetIntegerv(GL_MAX_TEXTURE_SIZE, &s);
+		spdlog::info("[core] max texture size: {}", s);
 
 #ifndef __APPLE__
 #ifndef NDEBUG
@@ -454,6 +456,7 @@ namespace Core::Graphics
 
 	Vector2U Window_SDL::getSize()
 	{
+		SDL_GetWindowSize(sdl_window, (int*)&sdl_window_width, (int*)&sdl_window_height);
 		return { sdl_window_width, sdl_window_height };
 	}
 	bool Window_SDL::setSize(Vector2U v)
diff --git a/LuaSTG/Core/Graphics/Window_SDL.hpp b/LuaSTG/Core/Graphics/Window_SDL.hpp
index c0e53da..862e492 100644
--- a/LuaSTG/Core/Graphics/Window_SDL.hpp
+++ b/LuaSTG/Core/Graphics/Window_SDL.hpp
@@ -7,7 +7,6 @@
 // #include "Platform/Monitor.hpp"
 // #include "Platform/WindowSizeMoveController.hpp"
 // #include "Platform/RuntimeLoader/DesktopWindowManager.hpp"
-#include <SDL_mouse.h>
 #include <SDL_rect.h>
 #include <SDL_surface.h>
 #include <SDL_video.h>