From 30b5287c3859f24ffbc91b5ac54ce550bbd8bd85 Mon Sep 17 00:00:00 2001
From: Quantum <quantum2048@gmail.com>
Date: Mon, 22 Feb 2021 00:03:50 -0500
Subject: [PATCH] [client] egl: add option to set initial scale algorithm

The option is egl:scale. The scale algorithm number is displayed on the
alert to make it easier to specify the number for the option.
---
 client/renderers/EGL/desktop.c | 19 +++++++++++++++----
 client/renderers/EGL/desktop.h |  3 +++
 client/renderers/EGL/egl.c     |  8 ++++++++
 3 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/client/renderers/EGL/desktop.c b/client/renderers/EGL/desktop.c
index 50fd6c0c..622717bd 100644
--- a/client/renderers/EGL/desktop.c
+++ b/client/renderers/EGL/desktop.c
@@ -142,9 +142,10 @@ bool egl_desktop_init(EGL_Desktop ** desktop, EGLDisplay * display)
   app_registerKeybind(KEY_N, egl_desktop_toggle_nv, *desktop, "Toggle night vision mode");
   app_registerKeybind(KEY_S, egl_desktop_toggle_scale_algo, *desktop, "Toggle scale algorithm");
 
-  (*desktop)->nvMax  = option_get_int("egl", "nvGainMax");
-  (*desktop)->nvGain = option_get_int("egl", "nvGain"   );
-  (*desktop)->cbMode = option_get_int("egl", "cbMode"   );
+  (*desktop)->nvMax     = option_get_int("egl", "nvGainMax");
+  (*desktop)->nvGain    = option_get_int("egl", "nvGain"   );
+  (*desktop)->cbMode    = option_get_int("egl", "cbMode"   );
+  (*desktop)->scaleAlgo = option_get_int("egl", "scale"    );
 
   return true;
 }
@@ -175,13 +176,23 @@ static const char * egl_desktop_scale_algo_name(int algorithm)
   }
 }
 
+bool egl_desktop_scale_validate(struct Option * opt, const char ** error)
+{
+  if (opt->value.x_int >= 0 && opt->value.x_int < EGL_SCALE_MAX)
+    return true;
+
+  *error = "Invalid scale algorithm number";
+  return false;
+}
+
 void egl_desktop_toggle_scale_algo(int key, void * opaque)
 {
   EGL_Desktop * desktop = (EGL_Desktop *)opaque;
   if (++desktop->scaleAlgo == EGL_SCALE_MAX)
     desktop->scaleAlgo = 0;
 
-  app_alert(LG_ALERT_INFO, "Scale Algorithm: %s", egl_desktop_scale_algo_name(desktop->scaleAlgo));
+  app_alert(LG_ALERT_INFO, "Scale Algorithm %d: %s", desktop->scaleAlgo,
+      egl_desktop_scale_algo_name(desktop->scaleAlgo));
 }
 
 void egl_desktop_free(EGL_Desktop ** desktop)
diff --git a/client/renderers/EGL/desktop.h b/client/renderers/EGL/desktop.h
index d367406b..7c0c7f66 100644
--- a/client/renderers/EGL/desktop.h
+++ b/client/renderers/EGL/desktop.h
@@ -32,6 +32,9 @@ enum EGL_DesktopScaleType
   EGL_DESKTOP_DOWNSCALE,
 };
 
+struct Option;
+bool egl_desktop_scale_validate(struct Option * opt, const char ** error);
+
 bool egl_desktop_init(EGL_Desktop ** desktop, EGLDisplay * display);
 void egl_desktop_free(EGL_Desktop ** desktop);
 
diff --git a/client/renderers/EGL/egl.c b/client/renderers/EGL/egl.c
index c5aa9694..315f9683 100644
--- a/client/renderers/EGL/egl.c
+++ b/client/renderers/EGL/egl.c
@@ -152,6 +152,14 @@ static struct Option egl_options[] =
     .type         = OPTION_TYPE_INT,
     .value.x_int  = 0
   },
+  {
+    .module       = "egl",
+    .name         = "scale",
+    .description  = "Set the scale algorithm (0 = auto, 1 = nearest, 2 = linear)",
+    .type         = OPTION_TYPE_INT,
+    .validator    = egl_desktop_scale_validate,
+    .value.x_int  = 0
+  },
   {0}
 };