ui: Clean up local variable shadowing

Local variables shadowing other local variables or parameters make the
code needlessly hard to understand.  Tracked down with -Wshadow=local.
Clean up: delete inner declarations when they are actually redundant,
else rename variables.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230921121312.1301864-4-armbru@redhat.com>

ui/gtk.c

@@ -930,8 +930,8 @@ static gboolean gd_motion_event(GtkWidget *widget, GdkEventMotion *motion,
         GdkMonitor *monitor = gdk_display_get_monitor_at_window(dpy, win);
         GdkRectangle geometry;
 
-        int x = (int)motion->x_root;
-        int y = (int)motion->y_root;
+        int xr = (int)motion->x_root;
+        int yr = (int)motion->y_root;
 
         gdk_monitor_get_geometry(monitor, &geometry);
 
@@ -942,13 +942,13 @@ static gboolean gd_motion_event(GtkWidget *widget, GdkEventMotion *motion,
          * may still be only half way across the screen. Without
          * this warp, the server pointer would thus appear to hit
          * an invisible wall */
-        if (x <= geometry.x || x - geometry.x >= geometry.width - 1 ||
-            y <= geometry.y || y - geometry.y >= geometry.height - 1) {
+        if (xr <= geometry.x || xr - geometry.x >= geometry.width - 1 ||
+            yr <= geometry.y || yr - geometry.y >= geometry.height - 1) {
             GdkDevice *dev = gdk_event_get_device((GdkEvent *)motion);
-            x = geometry.x + geometry.width / 2;
-            y = geometry.y + geometry.height / 2;
+            xr = geometry.x + geometry.width / 2;
+            yr = geometry.y + geometry.height / 2;
 
-            gdk_device_warp(dev, screen, x, y);
+            gdk_device_warp(dev, screen, xr, yr);
             s->last_set = FALSE;
             return FALSE;
         }

ui/spice-display.c

@@ -1081,15 +1081,16 @@ static void qemu_spice_gl_update(DisplayChangeListener *dcl,
     }
 
     if (render_cursor) {
-        int x, y;
+        int ptr_x, ptr_y;
+
         qemu_mutex_lock(&ssd->lock);
-        x = ssd->ptr_x;
-        y = ssd->ptr_y;
+        ptr_x = ssd->ptr_x;
+        ptr_y = ssd->ptr_y;
         qemu_mutex_unlock(&ssd->lock);
         egl_texture_blit(ssd->gls, &ssd->blit_fb, &ssd->guest_fb,
                          !y_0_top);
         egl_texture_blend(ssd->gls, &ssd->blit_fb, &ssd->cursor_fb,
-                          !y_0_top, x, y, 1.0, 1.0);
+                          !y_0_top, ptr_x, ptr_y, 1.0, 1.0);
         glFlush();
     }
 

ui/vnc-enc-zrle.c.inc

@@ -153,11 +153,12 @@ static void ZRLE_ENCODE_TILE(VncState *vs, ZRLE_PIXEL *data, int w, int h,
     }
 
     if (use_rle) {
-        ZRLE_PIXEL *ptr = data;
-        ZRLE_PIXEL *end = ptr + w * h;
         ZRLE_PIXEL *run_start;
         ZRLE_PIXEL pix;
 
+        ptr = data;
+        end = ptr + w * h;
+
         while (ptr < end) {
             int len;
             int index = 0;
@@ -198,7 +199,7 @@ static void ZRLE_ENCODE_TILE(VncState *vs, ZRLE_PIXEL *data, int w, int h,
         }
     } else if (use_palette) { /* no RLE */
         int bppp;
-        ZRLE_PIXEL *ptr = data;
+        ptr = data;
 
         /* packed pixels */
 
@@ -241,8 +242,6 @@ static void ZRLE_ENCODE_TILE(VncState *vs, ZRLE_PIXEL *data, int w, int h,
 #endif
         {
 #ifdef ZRLE_COMPACT_PIXEL
-            ZRLE_PIXEL *ptr;
-
             for (ptr = data; ptr < data + w * h; ptr++) {
                 ZRLE_WRITE_PIXEL(vs, *ptr);
             }

ui/vnc-palette.c

@@ -86,8 +86,6 @@ int palette_put(VncPalette *palette, uint32_t color)
         return 0;
     }
     if (!entry) {
-        VncPaletteEntry *entry;
-
         entry = &palette->pool[palette->size];
         entry->color = color;
         entry->idx = idx;

ui/vnc.c

@@ -1584,15 +1584,15 @@ static void vnc_jobs_bh(void *opaque)
  */
 static int vnc_client_read(VncState *vs)
 {
-    size_t ret;
+    size_t sz;
 
 #ifdef CONFIG_VNC_SASL
     if (vs->sasl.conn && vs->sasl.runSSF)
-        ret = vnc_client_read_sasl(vs);
+        sz = vnc_client_read_sasl(vs);
     else
 #endif /* CONFIG_VNC_SASL */
-        ret = vnc_client_read_plain(vs);
-    if (!ret) {
+        sz = vnc_client_read_plain(vs);
+    if (!sz) {
         if (vs->disconnecting) {
             vnc_disconnect_finish(vs);
             return -1;
@@ -3118,8 +3118,8 @@ static int vnc_refresh_server_surface(VncDisplay *vd)
     cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES,
                     server_stride);
     if (vd->guest.format != VNC_SERVER_FB_FORMAT) {
-        int width = pixman_image_get_width(vd->server);
-        tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width);
+        int w = pixman_image_get_width(vd->server);
+        tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, w);
     } else {
         int guest_bpp =
             PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb));