From: Scott Jones <scottajones@gmail.com>
Subject: [PATCH] render: detect software rendering from the GL renderer (0.56.2 backport)

Backport-of: 61d0ff60a7547d49229714a68b7ca9c0b6658727
Upstream-PR: https://github.com/hyprwm/Hyprland/pull/16343
Co-authored-by: Eryk Wieliczko <44800858+erykwieliczko@users.noreply.github.com>

Adapt constructor and logger-context differences against v0.56.2 while
preserving the original GL classification behavior. Remove this backport
once the packaged upstream version includes this behavior.

--- a/src/render/GLRenderer.cpp
+++ b/src/render/GLRenderer.cpp
@@ -36,7 +36,14 @@
 #include <xf86drm.h>
 }
 
-CHyprGLRenderer::CHyprGLRenderer() : IHyprRenderer(), m_elementRenderer(makeUnique<CGLElementRenderer>()) {}
+CHyprGLRenderer::CHyprGLRenderer() : IHyprRenderer(), m_elementRenderer(makeUnique<CGLElementRenderer>()) {
+    // KMS can be display-only; classify the active GL renderer instead of the DRM driver.
+    g_pHyprOpenGL->makeEGLCurrent();
+    if (const auto* renderer = rc<const char*>(glGetString(GL_RENDERER))) {
+        const std::string name{renderer};
+        m_software = name.contains("llvmpipe") || name.contains("softpipe") || name.contains("Software Rasterizer");
+    }
+}
 
 IHyprRenderer::eType CHyprGLRenderer::type() {
     return RT_GL;
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -104,8 +104,6 @@
                 m_nvidia = true;
             else if (name.contains("i915"))
                 m_intel = true;
-            else if (name.contains("softpipe") || name.contains("Software Rasterizer") || name.contains("llvmpipe"))
-                m_software = true;
 
             Log::logger->log(Log::DEBUG, "DRM driver information: {} v{}.{}.{} from {} description {}", name, DRMV->version_major, DRMV->version_minor, DRMV->version_patchlevel,
                              std::string{DRMV->date, DRMV->date_len}, std::string{DRMV->desc, DRMV->desc_len});
@@ -126,8 +124,6 @@
                 m_nvidia = true;
             else if (name.contains("i915"))
                 m_intel = true;
-            else if (name.contains("softpipe") || name.contains("Software Rasterizer") || name.contains("llvmpipe"))
-                m_software = true;
 
             Log::logger->log(Log::DEBUG, "Primary DRM driver information: {} v{}.{}.{} from {} description {}", name, DRMV->version_major, DRMV->version_minor,
                              DRMV->version_patchlevel, std::string{DRMV->date, DRMV->date_len}, std::string{DRMV->desc, DRMV->desc_len});