From e6f8dcfdb0c04a0944dc2a08730058ec439631dd Mon Sep 17 00:00:00 2001
From: Benau <Benau@users.noreply.github.com>
Date: Sun, 28 Aug 2022 09:27:08 +0800
Subject: [PATCH] Make render scale configurable in ui for vulkan

---
 .../include/ge_vulkan_driver.hpp              |  1 +
 lib/graphics_engine/src/ge_vulkan_driver.cpp  | 19 +++++++++++++++++++
 src/graphics/irr_driver.cpp                   |  2 ++
 .../options/options_screen_video.cpp          | 19 ++++++++++++++-----
 4 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/lib/graphics_engine/include/ge_vulkan_driver.hpp b/lib/graphics_engine/include/ge_vulkan_driver.hpp
index 0d85912b3..d395f3b2e 100644
--- a/lib/graphics_engine/include/ge_vulkan_driver.hpp
+++ b/lib/graphics_engine/include/ge_vulkan_driver.hpp
@@ -337,6 +337,7 @@ namespace GE
             destroySwapChainRelated(false/*handle_surface*/);
             createSwapChainRelated(false/*handle_surface*/);
         }
+        void updateRenderScale(float value);
         uint32_t getGraphicsFamily() const         { return m_graphics_family; }
         unsigned getGraphicsQueueCount() const
                                               { return m_graphics_queue_count; }
diff --git a/lib/graphics_engine/src/ge_vulkan_driver.cpp b/lib/graphics_engine/src/ge_vulkan_driver.cpp
index eff630d67..a083b0fa1 100644
--- a/lib/graphics_engine/src/ge_vulkan_driver.cpp
+++ b/lib/graphics_engine/src/ge_vulkan_driver.cpp
@@ -2413,6 +2413,25 @@ bool GEVulkanDriver::setRenderTarget(video::ITexture* texture,
     return true;
 }   // setRenderTarget
 
+// ----------------------------------------------------------------------------
+void GEVulkanDriver::updateRenderScale(float value)
+{
+    if (getGEConfig()->m_render_scale == value)
+        return;
+    waitIdle();
+    setDisableWaitIdle(true);
+    destroySwapChainRelated(false/*handle_surface*/);
+    getGEConfig()->m_render_scale = value;
+    createSwapChainRelated(false/*handle_surface*/);
+    for (auto& dc : static_cast<GEVulkanSceneManager*>(
+        m_irrlicht_device->getSceneManager())->getDrawCalls())
+        dc.second = std::unique_ptr<GEVulkanDrawCall>(new GEVulkanDrawCall);
+    GEVulkanSkyBoxRenderer::destroy();
+    GEVulkan2dRenderer::destroy();
+    GEVulkan2dRenderer::init(this);
+    setDisableWaitIdle(false);
+}   // updateRenderScale
+
 }
 
 namespace irr
diff --git a/src/graphics/irr_driver.cpp b/src/graphics/irr_driver.cpp
index d81e7b8c1..cbabf3229 100644
--- a/src/graphics/irr_driver.cpp
+++ b/src/graphics/irr_driver.cpp
@@ -414,6 +414,8 @@ void IrrDriver::initDevice()
 #ifndef SERVER_ONLY
         GE::getGEConfig()->m_texture_compression =
             UserConfigParams::m_texture_compression;
+        GE::getGEConfig()->m_render_scale =
+            UserConfigParams::m_scale_rtts_factor;
 #endif
     }
     else
diff --git a/src/states_screens/options/options_screen_video.cpp b/src/states_screens/options/options_screen_video.cpp
index 60c126af4..4332be641 100644
--- a/src/states_screens/options/options_screen_video.cpp
+++ b/src/states_screens/options/options_screen_video.cpp
@@ -464,7 +464,10 @@ void OptionsScreenVideo::init()
     gfx->setActive(!in_game && CVS->isGLSL());
     getWidget<ButtonWidget>("custom")->setActive(!in_game || !CVS->isGLSL());
     if (getWidget<SpinnerWidget>("scale_rtts")->isActivated())
-        getWidget<SpinnerWidget>("scale_rtts")->setActive(!in_game);
+    {
+        getWidget<SpinnerWidget>("scale_rtts")->setActive(!in_game ||
+            GE::getDriver()->getDriverType() == video::EDT_VULKAN);
+    }
 #endif
 
 #if defined(MOBILE_STK) || defined(__SWITCH__)
@@ -555,7 +558,8 @@ void OptionsScreenVideo::updateGfxSlider()
         setActive(UserConfigParams::m_dynamic_lights && CVS->isGLSL());
     // Same with Render resolution slider
     getWidget<GUIEngine::SpinnerWidget>("scale_rtts")->
-        setActive(UserConfigParams::m_dynamic_lights && CVS->isGLSL());
+        setActive((UserConfigParams::m_dynamic_lights && CVS->isGLSL()) ||
+        GE::getDriver()->getDriverType() == video::EDT_VULKAN);
 
     updateTooltip();
 #endif
@@ -791,9 +795,11 @@ void OptionsScreenVideo::eventCallback(Widget* widget, const std::string& name,
         getWidget<GUIEngine::SpinnerWidget>("blur_level")->setActive(level >= 2);
 
         // Same with Render resolution slider
+#ifndef SERVER_ONLY
         getWidget<GUIEngine::SpinnerWidget>("scale_rtts")->
-            setActive(UserConfigParams::m_dynamic_lights);
-
+            setActive(UserConfigParams::m_dynamic_lights ||
+            GE::getDriver()->getDriverType() == video::EDT_VULKAN);
+#endif
         UserConfigParams::m_animated_characters = m_presets[level].animatedCharacters;
         UserConfigParams::m_particles_effects = m_presets[level].particles;
         setImageQuality(m_presets[level].image_quality);
@@ -844,7 +850,10 @@ void OptionsScreenVideo::eventCallback(Widget* widget, const std::string& name,
         assert(level < (int)m_scale_rtts_custom_presets.size());
 
         UserConfigParams::m_scale_rtts_factor = m_scale_rtts_custom_presets[level].value;
-
+#ifndef SERVER_ONLY
+        if (GE::getVKDriver())
+            GE::getVKDriver()->updateRenderScale(UserConfigParams::m_scale_rtts_factor);
+#endif
         updateScaleRTTsSlider();
     }
     else if (name == "rememberWinpos")