From 88e9e0394541a853600bc2c910005c05fa156269 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Mon, 4 Nov 2024 19:42:47 +0000
Subject: [PATCH] renderer: add expand_undersized_textures

adds an option to disable the texture expansion for textures that are smaller while resizing up
---
 src/config/ConfigManager.cpp |  1 +
 src/render/Renderer.cpp      | 28 ++++++++++++++++------------
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 62c71dc7..c5d53e6a 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -590,6 +590,7 @@ CConfigManager::CConfigManager() {
     m_pConfig->addConfigValue("render:explicit_sync", Hyprlang::INT{2});
     m_pConfig->addConfigValue("render:explicit_sync_kms", Hyprlang::INT{2});
     m_pConfig->addConfigValue("render:direct_scanout", Hyprlang::INT{0});
+    m_pConfig->addConfigValue("render:expand_undersized_textures", Hyprlang::INT{1});
 
     // devices
     m_pConfig->addSpecialCategory("device", {"name"});
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index a133899b..6af3a99d 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -1084,8 +1084,10 @@ void CHyprRenderer::renderSessionLockMissing(PHLMONITOR pMonitor) {
 void CHyprRenderer::calculateUVForSurface(PHLWINDOW pWindow, SP<CWLSurfaceResource> pSurface, PHLMONITOR pMonitor, bool main, const Vector2D& projSize,
                                           const Vector2D& projSizeUnscaled, bool fixMisalignedFSV1) {
     if (!pWindow || !pWindow->m_bIsX11) {
-        Vector2D uvTL;
-        Vector2D uvBR = Vector2D(1, 1);
+        static auto PEXPANDEDGES = CConfigValue<Hyprlang::INT>("render:expand_undersized_textures");
+
+        Vector2D    uvTL;
+        Vector2D    uvBR = Vector2D(1, 1);
 
         if (pSurface->current.viewport.hasSource) {
             // we stretch it to dest. if no dest, to 1,1
@@ -1115,16 +1117,18 @@ void CHyprRenderer::calculateUVForSurface(PHLWINDOW pWindow, SP<CWLSurfaceResour
         // this will break if later on xdg geometry is hit, but we really try
         // to let the apps know to NOT add CSD. Also if source is there.
         // there is no way to fix this if that's the case
-        const auto MONITOR_WL_SCALE = std::ceil(pMonitor->scale);
-        const bool SCALE_UNAWARE    = MONITOR_WL_SCALE != pSurface->current.scale && !pSurface->current.viewport.hasDestination;
-        const auto EXPECTED_SIZE =
-            ((pSurface->current.viewport.hasDestination ? pSurface->current.viewport.destination : pSurface->current.bufferSize / pSurface->current.scale) * pMonitor->scale)
-                .round();
-        if (!SCALE_UNAWARE && (EXPECTED_SIZE.x < projSize.x || EXPECTED_SIZE.y < projSize.y)) {
-            // this will not work with shm AFAIK, idk why.
-            // NOTE: this math is wrong if we have a source... or geom updates later, but I don't think we can do much
-            const auto FIX = projSize / EXPECTED_SIZE;
-            uvBR           = uvBR * FIX;
+        if (*PEXPANDEDGES) {
+            const auto MONITOR_WL_SCALE = std::ceil(pMonitor->scale);
+            const bool SCALE_UNAWARE    = MONITOR_WL_SCALE != pSurface->current.scale && !pSurface->current.viewport.hasDestination;
+            const auto EXPECTED_SIZE =
+                ((pSurface->current.viewport.hasDestination ? pSurface->current.viewport.destination : pSurface->current.bufferSize / pSurface->current.scale) * pMonitor->scale)
+                    .round();
+            if (!SCALE_UNAWARE && (EXPECTED_SIZE.x < projSize.x || EXPECTED_SIZE.y < projSize.y)) {
+                // this will not work with shm AFAIK, idk why.
+                // NOTE: this math is wrong if we have a source... or geom updates later, but I don't think we can do much
+                const auto FIX = projSize / EXPECTED_SIZE;
+                uvBR           = uvBR * FIX;
+            }
         }
 
         g_pHyprOpenGL->m_RenderData.primarySurfaceUVTopLeft     = uvTL;