From 2a177aa9a18e72954522e3e7e9b877ae6bf10c04 Mon Sep 17 00:00:00 2001
From: Ignacio Sanchez Gines <nacho@geardome.com>
Date: Sun, 12 Apr 2020 21:35:55 +0200
Subject: [PATCH] Fix libretro RGB565 rendering

---
 src/GearsystemCore.cpp | 17 +++++++++++++++++
 src/GearsystemCore.h   |  1 +
 src/definitions.h      |  8 --------
 3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/GearsystemCore.cpp b/src/GearsystemCore.cpp
index 21053aaf..bfbab000 100644
--- a/src/GearsystemCore.cpp
+++ b/src/GearsystemCore.cpp
@@ -790,3 +790,20 @@ void GearsystemCore::Reset()
     m_pSmsIOPorts->Reset();
     m_bPaused = false;
 }
+
+void GearsystemCore::Get16BitFrameBuffer(GS_Color* pFrameBuffer, u16* p16BitFrameBuffer)
+{
+    if (IsValidPointer(pFrameBuffer) && IsValidPointer(p16BitFrameBuffer))
+    {
+        int pixels = GS_RESOLUTION_MAX_WIDTH * GS_RESOLUTION_MAX_HEIGHT;
+        
+
+        for (int i = 0; i < pixels; i++)
+        {
+            GS_Color p = pFrameBuffer[i];
+
+            p16BitFrameBuffer[i] = 0;
+            p16BitFrameBuffer[i] = ((p.red >> 3) << 11) | ((p.green >> 2) << 5) | (p.blue >> 3);
+        }
+    }
+}
diff --git a/src/GearsystemCore.h b/src/GearsystemCore.h
index 79b408cc..938c58bf 100644
--- a/src/GearsystemCore.h
+++ b/src/GearsystemCore.h
@@ -76,6 +76,7 @@ class GearsystemCore
     Memory* GetMemory();
     Cartridge* GetCartridge();
     void SetSG1000Palette(GS_Color* pSG1000Palette);
+    void Get16BitFrameBuffer(GS_Color* pFrameBuffer, u16* p16BitFrameBuffer);
 
 private:
     void InitMemoryRules();
diff --git a/src/definitions.h b/src/definitions.h
index 3752ccc2..4badc4b3 100644
--- a/src/definitions.h
+++ b/src/definitions.h
@@ -115,14 +115,6 @@ struct GS_Color
     u8 blue;
 };
 
-enum GS_Color_Format
-{
-    GS_PIXEL_RGB565,
-    GS_PIXEL_RGB555,
-    GS_PIXEL_BGR565,
-    GS_PIXEL_BGR555
-};
-
 enum GS_Keys
 {
     Key_Up = 0,