From b3742567d40d199629f33027b2260e5440dc7591 Mon Sep 17 00:00:00 2001
From: Joel <sauskethunderkid@gmail.com>
Date: Sun, 2 Apr 2017 22:55:37 -0500
Subject: [PATCH] Implement GSPLCD::GetBrightness (#351)

* Implement GSPLCD::GetBrightness

* Split input and output params
---
 libctru/include/3ds/services/gsplcd.h |  9 ++++++++-
 libctru/source/services/gsplcd.c      | 14 ++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/libctru/include/3ds/services/gsplcd.h b/libctru/include/3ds/services/gsplcd.h
index 0ac9a97..15f3fce 100644
--- a/libctru/include/3ds/services/gsplcd.h
+++ b/libctru/include/3ds/services/gsplcd.h
@@ -35,4 +35,11 @@ Result GSPLCD_PowerOffBacklight(u32 screen);
  * @brief Gets the LCD screens' vendors. Stubbed on old 3ds.
  * @param vendor Pointer to output the screen vendors to.
  */
-Result GSPLCD_GetVendors(u8 *vendors);
\ No newline at end of file
+Result GSPLCD_GetVendors(u8 *vendors);
+
+/**
+ * @brief Gets the LCD screens' brightness. Stubbed on old 3ds.
+ * @param screen Screen to get the brightness value of.
+ * @param brightness Brightness value returned.
+ */
+Result GSPLCD_GetBrightness(u32 screen, u32 *brightness);
\ No newline at end of file
diff --git a/libctru/source/services/gsplcd.c b/libctru/source/services/gsplcd.c
index d293efe..f9dcd67 100644
--- a/libctru/source/services/gsplcd.c
+++ b/libctru/source/services/gsplcd.c
@@ -66,3 +66,17 @@ Result GSPLCD_GetVendors(u8 *vendors)
 	return cmdbuf[1];
 }
 
+Result GSPLCD_GetBrightness(u32 screen, u32 *brightness)
+{
+    u32 *cmdbuf = getThreadCommandBuffer();
+ 
+    cmdbuf[0] = IPC_MakeHeader(0x15,1,0); // 0x150040
+    cmdbuf[1] = screen;
+ 
+    Result ret = 0;
+    if (R_FAILED(ret = svcSendSyncRequest(gspLcdHandle))) return ret;
+   
+    *brightness = cmdbuf[2];
+   
+    return cmdbuf[2];
+}
\ No newline at end of file