From: Inès Varhol <ines.varhol@telecom-paris.fr>
Date: Sun, 15 Sep 2024 12:57:00 +0000 (+0200)
Subject: hw/display: Fix mirrored output in dm163
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d524be28c5933a9d7605955a2368212a31c72d16;p=qemu.git

hw/display: Fix mirrored output in dm163

DM163 is an emulated 8x8 LED matrix. This commit flips the image
horizontally so it's rendered the same way as on the hardware.

Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---

diff --git a/hw/display/dm163.c b/hw/display/dm163.c
index f92aee371d..75a91f62bd 100644
--- a/hw/display/dm163.c
+++ b/hw/display/dm163.c
@@ -271,7 +271,7 @@ static uint32_t *update_display_of_row(DM163State *s, uint32_t *dest,
                                        unsigned row)
 {
     for (unsigned _ = 0; _ < LED_SQUARE_SIZE; _++) {
-        for (int x = 0; x < RGB_MATRIX_NUM_COLS * LED_SQUARE_SIZE; x++) {
+        for (int x = RGB_MATRIX_NUM_COLS * LED_SQUARE_SIZE - 1; x >= 0; x--) {
             /* UI layer guarantees that there's 32 bits per pixel (Mar 2024) */
             *dest++ = s->buffer[s->buffer_idx_of_row[row]][x / LED_SQUARE_SIZE];
         }