From 5c1cbedc034c59caba3955c663868c74e9631731 Mon Sep 17 00:00:00 2001
From: pjft
Date: Sat, 6 May 2017 21:51:55 +0100
Subject: Adding enable/disable dithering core option with support for Neon GPU

---
 frontend/libretro.c   | 22 ++++++++++++++++++++++
 frontend/plugin_lib.h |  1 +
 2 files changed, 23 insertions(+)

(limited to 'frontend')

diff --git a/frontend/libretro.c b/frontend/libretro.c
index c078494..3013a7f 100644
--- a/frontend/libretro.c
+++ b/frontend/libretro.c
@@ -456,6 +456,7 @@ void retro_set_environment(retro_environment_t cb)
       { "pcsx_rearmed_multitap1", "Multitap 1; auto|disabled|enabled" },
       { "pcsx_rearmed_multitap2", "Multitap 2; auto|disabled|enabled" },
       { "pcsx_rearmed_vibration", "Enable Vibration; enabled|disabled" },
+      { "pcsx_rearmed_dithering", "Enable Dithering; enabled|disabled" },
 #ifndef DRC_DISABLE
       { "pcsx_rearmed_drc", "Dynamic recompiler; enabled|disabled" },
 #endif
@@ -1376,6 +1377,27 @@ static void update_variables(bool in_flight)
          in_enable_vibration = 1;
    }
 
+   var.value = NULL;
+   var.key = "pcsx_rearmed_dithering";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "disabled") == 0) {
+         pl_rearmed_cbs.gpu_peops.iUseDither = 0;
+         pl_rearmed_cbs.gpu_peopsgl.bDrawDither = 0;
+#ifdef __ARM_NEON__
+         pl_rearmed_cbs.gpu_neon.allow_dithering = 0;
+#endif
+      }
+      else if (strcmp(var.value, "enabled") == 0) {
+         pl_rearmed_cbs.gpu_peops.iUseDither = 1;
+         pl_rearmed_cbs.gpu_peopsgl.bDrawDither = 1;
+#ifdef __ARM_NEON__
+         pl_rearmed_cbs.gpu_neon.allow_dithering = 1;
+#endif
+      }
+   }
+
 #ifdef __ARM_NEON__
    var.value = "NULL";
    var.key = "pcsx_rearmed_neon_interlace_enable";
diff --git a/frontend/plugin_lib.h b/frontend/plugin_lib.h
index 83b2774..92e62e9 100644
--- a/frontend/plugin_lib.h
+++ b/frontend/plugin_lib.h
@@ -71,6 +71,7 @@ struct rearmed_cbs {
 		int   allow_interlace; // 0 off, 1 on, 2 guess
 		int   enhancement_enable;
 		int   enhancement_no_main;
+		int   allow_dithering;
 	} gpu_neon;
 	struct {
 		int   iUseDither;
-- 
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