From 7505915479ac75a67d437277e2043a422d3bafd9 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sun, 2 Jul 2023 15:10:26 -0500
Subject: [PATCH] GUI: render backend recovery, part 6

untested OpenGL implementation
---
 src/gui/render/renderGL.cpp | 17 +++++++++++++++++
 src/gui/render/renderGL.h   |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/gui/render/renderGL.cpp b/src/gui/render/renderGL.cpp
index c51ab7df2..b16f04975 100644
--- a/src/gui/render/renderGL.cpp
+++ b/src/gui/render/renderGL.cpp
@@ -51,6 +51,10 @@ PFNGLGETUNIFORMLOCATIONPROC furGetUniformLocation=NULL;
 PFNGLUNIFORM1FPROC furUniform1f=NULL;
 PFNGLGETSHADERINFOLOGPROC furGetShaderInfoLog=NULL;
 
+#ifndef USE_GLES
+PFNGLGETGRAPHICSRESETSTATUSARBPROC furGetGraphicsResetStatusARB=NULL;
+#endif
+
 class FurnaceGLTexture: public FurnaceGUITexture {
   public:
   GLuint id;
@@ -359,6 +363,9 @@ bool FurnaceGUIRenderGL::init(SDL_Window* win) {
   LOAD_PROC_OPTIONAL(furUniform1f,PFNGLUNIFORM1FPROC,"glUniform1f");
   LOAD_PROC_OPTIONAL(furGetShaderInfoLog,PFNGLGETSHADERINFOLOGPROC,"glGetShaderInfoLog");
 
+#ifndef USE_GLES
+  LOAD_PROC_OPTIONAL(furGetGraphicsResetStatusARB,PFNGLGETGRAPHICSRESETSTATUSARBPROC,"glGetGraphicsResetStatusARB");
+#endif
 
   if (createShader(sh_wipe_srcV,sh_wipe_srcF,sh_wipe_vertex,sh_wipe_fragment,sh_wipe_program)) {
     sh_wipe_uAlpha=furGetUniformLocation(sh_wipe_program,"uAlpha");
@@ -383,3 +390,13 @@ bool FurnaceGUIRenderGL::quit() {
 void FurnaceGUIRenderGL::quitGUI() { 
   ImGui_ImplOpenGL3_Shutdown();
 }
+
+bool FurnaceGUIRenderGL::isDead() {
+#ifndef USE_GLES
+   if (furGetGraphicsResetStatusARB==NULL) return false;
+   return (furGetGraphicsResetStatusARB()!=GL_NO_ERROR);
+#else
+   // handled by SDL... I think
+   return false;
+#endif
+}
diff --git a/src/gui/render/renderGL.h b/src/gui/render/renderGL.h
index 541ee3cb1..55d399730 100644
--- a/src/gui/render/renderGL.h
+++ b/src/gui/render/renderGL.h
@@ -57,9 +57,10 @@ class FurnaceGUIRenderGL: public FurnaceGUIRender {
     void initGUI(SDL_Window* win);
     void quitGUI();
     bool quit();
+    bool isDead();
     FurnaceGUIRenderGL():
       context(NULL),
       sdlWin(NULL) {
       memset(quadVertex,0,4*3*sizeof(float));
     }
-};
\ No newline at end of file
+};