1 files changed, 29 insertions, 11 deletions

diff --git a/minuitwrp/graphics_fbdev.cpp b/minuitwrp/graphics_fbdev.cpp
index e653c5a4a..5da329bf1 100644
--- a/minuitwrp/graphics_fbdev.cpp
+++ b/minuitwrp/graphics_fbdev.cpp
@@ -243,19 +243,20 @@ static GRSurface* fbdev_init(minui_backend* backend) {
 }
 
 static GRSurface* fbdev_flip(minui_backend* backend __unused) {
-    if (double_buffered) {
 #if defined(RECOVERY_BGRA)
-        // In case of BGRA, do some byte swapping
-        unsigned int idx;
-        unsigned char tmp;
-        unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
-        for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
-                idx += 4) {
-            tmp = ucfb_vaddr[idx];
-            ucfb_vaddr[idx    ] = ucfb_vaddr[idx + 2];
-            ucfb_vaddr[idx + 2] = tmp;
-        }
+    // In case of BGRA, do some byte swapping
+    unsigned int idx;
+    unsigned char tmp;
+    unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
+    for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
+            idx += 4) {
+        tmp = ucfb_vaddr[idx];
+        ucfb_vaddr[idx    ] = ucfb_vaddr[idx + 2];
+        ucfb_vaddr[idx + 2] = tmp;
+    }
 #endif
+#ifndef BOARD_HAS_FLIPPED_SCREEN
+    if (double_buffered) {
         // Copy from the in-memory surface to the framebuffer.
         memcpy(gr_framebuffer[1-displayed_buffer].data, gr_draw->data,
                gr_draw->height * gr_draw->row_bytes);
@@ -265,6 +266,23 @@ static GRSurface* fbdev_flip(minui_backend* backend __unused) {
         memcpy(gr_framebuffer[0].data, gr_draw->data,
                gr_draw->height * gr_draw->row_bytes);
     }
+#else
+    int gr_active_fb = 0;
+    if (double_buffered)
+        gr_active_fb = 1-displayed_buffer;
+
+    /* flip buffer 180 degrees for devices with physicaly inverted screens */
+    unsigned int i, j;
+    for (i = 0; i < vi.yres; i++) {
+        for (j = 0; j < vi.xres; j++) {
+            memcpy(gr_framebuffer[gr_active_fb].data + (i * vi.xres_virtual + j) * gr_framebuffer[0].pixel_bytes,
+                   gr_draw->data + ((vi.yres - i - 1) * vi.xres_virtual + vi.xres - j - 1) * gr_framebuffer[0].pixel_bytes,
+                   gr_framebuffer[0].pixel_bytes);
+        }
+    }
+    if (double_buffered)
+        set_displayed_framebuffer(1-displayed_buffer);
+#endif
     return gr_draw;
 }