[PATCH RFC 13/14] Change validate_surface to return surface pointer

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
 server/dcc-send.c        |  8 ++++----
 server/display-channel.c | 19 +++++++++++--------
 server/display-channel.h |  2 +-
 3 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/server/dcc-send.c b/server/dcc-send.c
index 1e31584..d5ed97e 100644
--- a/server/dcc-send.c
+++ b/server/dcc-send.c
@@ -94,9 +94,9 @@ static int is_surface_area_lossy(DisplayChannelClient *dcc, uint32_t surface_id,
     QRegion lossy_region;
     DisplayChannel *display = DCC_TO_DC(dcc);
 
-    spice_return_val_if_fail(display_channel_validate_surface(display, surface_id), FALSE);
+    surface = display_channel_validate_surface(display, surface_id);
+    spice_return_val_if_fail(surface, FALSE);
 
-    surface = &display->priv->surfaces[surface_id];
     surface_lossy_region = &dcc->priv->surface_client_lossy_region[surface_id];
 
     if (!area) {
@@ -401,13 +401,13 @@ static FillBitsType fill_bits(DisplayChannelClient *dcc, SpiceMarshaller *m,
         RedSurface *surface;
 
         surface_id = simage->u.surface.surface_id;
-        if (!display_channel_validate_surface(display, surface_id)) {
+        surface = display_channel_validate_surface(display, surface_id);
+        if (!surface) {
             spice_warning("Invalid surface in SPICE_IMAGE_TYPE_SURFACE");
             pthread_mutex_unlock(&dcc->priv->pixmap_cache->lock);
             return FILL_BITS_TYPE_SURFACE;
         }
 
-        surface = &display->priv->surfaces[surface_id];
         image.descriptor.type = SPICE_IMAGE_TYPE_SURFACE;
         image.descriptor.flags = 0;
         image.descriptor.width = surface->context.width;
diff --git a/server/display-channel.c b/server/display-channel.c
index d0b4a25..cf019fe 100644
--- a/server/display-channel.c
+++ b/server/display-channel.c
@@ -2073,19 +2073,20 @@ int display_channel_get_stream_id(DisplayChannel *display, Stream *stream)
     return (int)(stream - display->priv->streams_buf);
 }
 
-gboolean display_channel_validate_surface(DisplayChannel *display, uint32_t surface_id)
+RedSurface *display_channel_validate_surface(DisplayChannel *display, uint32_t surface_id)
 {
     if SPICE_UNLIKELY(surface_id >= display->priv->n_surfaces) {
         spice_warning("invalid surface_id %u", surface_id);
-        return FALSE;
+        return NULL;
     }
-    if (!display->priv->surfaces[surface_id].context.canvas) {
+    RedSurface *surface = &display->priv->surfaces[surface_id];
+    if (!surface->context.canvas) {
         spice_warning("canvas address is %p for %d (and is NULL)\n",
                    &(display->priv->surfaces[surface_id].context.canvas), surface_id);
         spice_warning("failed on %d", surface_id);
-        return FALSE;
+        return NULL;
     }
-    return TRUE;
+    return surface;
 }
 
 void display_channel_update_monitors_config(DisplayChannel *display,
@@ -2102,14 +2103,16 @@ void display_channel_update_monitors_config(DisplayChannel *display,
 
 void display_channel_set_monitors_config_to_primary(DisplayChannel *display)
 {
-    DrawContext *context = &display->priv->surfaces[0].context;
-    QXLHead head = { 0, };
+    RedSurface *surface = display_channel_validate_surface(display, 0);
 
-    spice_return_if_fail(display->priv->surfaces[0].context.canvas);
+    spice_return_if_fail(surface);
+
+    DrawContext *context = &surface->context;
 
     if (display->priv->monitors_config)
         monitors_config_unref(display->priv->monitors_config);
 
+    QXLHead head = { 0, };
     head.width = context->width;
     head.height = context->height;
     display->priv->monitors_config = monitors_config_new(&head, 1, 1);
diff --git a/server/display-channel.h b/server/display-channel.h
index bd386a7..2b04bb6 100644
--- a/server/display-channel.h
+++ b/server/display-channel.h
@@ -295,7 +295,7 @@ void display_channel_update_monitors_config(DisplayChannel *display, QXLMonitors
                                             uint16_t count, uint16_t max_allowed);
 void display_channel_set_monitors_config_to_primary(DisplayChannel *display);
 
-gboolean display_channel_validate_surface(DisplayChannel *display, uint32_t surface_id);
+RedSurface *display_channel_validate_surface(DisplayChannel *display, uint32_t surface_id);
 gboolean display_channel_surface_has_canvas(DisplayChannel *display, uint32_t surface_id);
 void display_channel_reset_image_cache(DisplayChannel *self);
 
-- 
2.7.4

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