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backends: Add method to get extents from viewport info

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This way we know the stage extents without poking the stage.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
This commit is contained in:
Carlos Garnacho 2020-07-31 19:10:53 +02:00 committed by Marge Bot
parent 165b7369c8
commit 1377c2a97e
2 changed files with 29 additions and 0 deletions
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25
src/backends/meta-viewport-info.c
View file

@ -187,3 +187,28 @@ meta_viewport_info_get_num_views (MetaViewportInfo *info)
{
return info->views->len;
}
void
meta_viewport_info_get_extents (MetaViewportInfo *viewport_info,
float *width,
float *height)
{
int min_x = G_MAXINT, min_y = G_MAXINT, max_x = G_MININT, max_y = G_MININT, i;
g_return_if_fail (viewport_info != NULL);
for (i = 0; i < viewport_info->views->len; i++)
{
ViewInfo *info = &g_array_index (viewport_info->views, ViewInfo, i);
min_x = MIN (min_x, info->rect.x);
max_x = MAX (max_x, info->rect.x + info->rect.width);
min_y = MIN (min_y, info->rect.y);
max_y = MAX (max_y, info->rect.y + info->rect.height);
}
if (width)
*width = (float) max_x - min_x;
if (height)
*height = (float) max_y - min_y;
}

4
src/backends/meta-viewport-info.h
View file

@ -51,4 +51,8 @@ int meta_viewport_info_get_neighbor (MetaViewportInfo *info,
int meta_viewport_info_get_num_views (MetaViewportInfo *info);
void meta_viewport_info_get_extents (MetaViewportInfo *info,
float *width,
float *height);
#endif /* META_VIEWPORT_INFO_H */