From 3247382752071f77b78fb714572f7d31f148e47a Mon Sep 17 00:00:00 2001
From: Nerdopolis Turfwalker <bluescreen_avenger@verizon.net>
Date: Tue, 15 Dec 2015 13:04:23 +0100
Subject: [PATCH] [backends/fbdev] Support framebuffers with different color
 depths

Support more framebuffer color depths

REVIEW: 126262
BUG: 355569
FIXED-IN: 5.5.1
---
 backends/fbdev/fb_backend.cpp | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/backends/fbdev/fb_backend.cpp b/backends/fbdev/fb_backend.cpp
index c22314569a..f5efe8b859 100644
--- a/backends/fbdev/fb_backend.cpp
+++ b/backends/fbdev/fb_backend.cpp
@@ -157,15 +157,48 @@ QImage::Format FramebufferBackend::imageFormat() const
     if (m_fd < 0) {
         return QImage::Format_Invalid;
     }
-    if (m_alpha.length == 0 &&
+
+    qCDebug(KWIN_FB) << "Bits Per Pixel: " << m_bitsPerPixel;
+    qCDebug(KWIN_FB) << "Buffer Length: " << m_bufferLength;
+    qCDebug(KWIN_FB) << "Bytes Per Line: " << m_bytesPerLine;
+    qCDebug(KWIN_FB) << "Alpha Length: " << m_alpha.length;
+    qCDebug(KWIN_FB) << "Red Length: "   << m_red.length;
+    qCDebug(KWIN_FB) << "Green Length: " << m_green.length;
+    qCDebug(KWIN_FB) << "Blue Length: "  << m_blue.length;
+    qCDebug(KWIN_FB) << "Blue Offset: "  << m_blue.offset;
+    qCDebug(KWIN_FB) << "Green Offset: " << m_green.offset;
+    qCDebug(KWIN_FB) << "Red Offset: "   << m_red.offset;
+    qCDebug(KWIN_FB) << "Alpha Offset: " << m_alpha.offset;
+
+    if (m_bitsPerPixel == 32 &&
             m_red.length == 8 &&
             m_green.length == 8 &&
             m_blue.length == 8 &&
             m_blue.offset == 0 &&
             m_green.offset == 8 &&
             m_red.offset == 16) {
+        qCDebug(KWIN_FB) << "Framebuffer format is RGB32";
         return QImage::Format_RGB32;
+    } else if (m_bitsPerPixel == 24 &&
+            m_red.length == 8 &&
+            m_green.length == 8 &&
+            m_blue.length == 8 &&
+            m_blue.offset == 0 &&
+            m_green.offset == 8 &&
+            m_red.offset == 16) {
+        qCDebug(KWIN_FB) << "Framebuffer Format is RGB888";
+        return QImage::Format_RGB888;
+    } else if (m_bitsPerPixel == 16 &&
+            m_red.length == 5 &&
+            m_green.length == 6 &&
+            m_blue.length == 5 &&
+            m_blue.offset == 0 &&
+            m_green.offset == 5 &&
+            m_red.offset == 11) {
+        qCDebug(KWIN_FB) << "Framebuffer Format is RGB16";
+        return QImage::Format_RGB16;
     }
+    qCWarning(KWIN_FB) << "Framebuffer format is unknown";
     return QImage::Format_Invalid;
 }