From 74a926dd9c44b163809ead6e36b33d67e7e03367 Mon Sep 17 00:00:00 2001
From: assiduous <assiduous@diligentgraphics.com>
Date: Sat, 16 Sep 2023 16:51:51 -0700
Subject: [PATCH] SwapChainGL: correct color format if sRGB framebuffers are
 not enabled

---
 .../GraphicsEngineOpenGL/src/SwapChainGLImpl.cpp  | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Graphics/GraphicsEngineOpenGL/src/SwapChainGLImpl.cpp b/Graphics/GraphicsEngineOpenGL/src/SwapChainGLImpl.cpp
index d935329359..c833878c75 100644
--- a/Graphics/GraphicsEngineOpenGL/src/SwapChainGLImpl.cpp
+++ b/Graphics/GraphicsEngineOpenGL/src/SwapChainGLImpl.cpp
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2022 Diligent Graphics LLC
+ *  Copyright 2019-2023 Diligent Graphics LLC
  *  Copyright 2015-2019 Egor Yusov
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -50,6 +50,19 @@ SwapChainGLImpl::SwapChainGLImpl(IReferenceCounters*       pRefCounters,
     }
 // clang-format on
 {
+    if (m_SwapChainDesc.ColorBufferFormat == TEX_FORMAT_RGBA8_UNORM_SRGB ||
+        m_SwapChainDesc.ColorBufferFormat == TEX_FORMAT_BGRA8_UNORM_SRGB)
+    {
+        if (glIsEnabled(GL_FRAMEBUFFER_SRGB) == GL_FALSE)
+        {
+            auto ColorFmt = m_SwapChainDesc.ColorBufferFormat == TEX_FORMAT_RGBA8_UNORM_SRGB ?
+                TEX_FORMAT_RGBA8_UNORM :
+                TEX_FORMAT_BGRA8_UNORM;
+            LOG_WARNING_MESSAGE("Changing swap chain color format to ", GetTextureFormatAttribs(ColorFmt).Name, " because sRGB framebuffers are not enabled.");
+            m_SwapChainDesc.ColorBufferFormat = ColorFmt;
+        }
+    }
+
     if (m_DesiredPreTransform != SURFACE_TRANSFORM_OPTIMAL &&
         m_DesiredPreTransform != SURFACE_TRANSFORM_IDENTITY)
     {