Re: [PATCH 54/67] ui/vc: console-vc requires PIXMAN

[Daniel P . Berrangé]

On Wed, Aug 30, 2023 at 01:38:28PM +0400, marcandre.lureau@redhat.com wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
> 
> Add stubs for the fallback paths.
> 
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  ui/console-vc-stubs.c | 59 +++++++++++++++++++++++++++++++++++++++++++
>  ui/meson.build        |  2 +-
>  2 files changed, 60 insertions(+), 1 deletion(-)
>  create mode 100644 ui/console-vc-stubs.c
> 
> diff --git a/ui/console-vc-stubs.c b/ui/console-vc-stubs.c
> new file mode 100644
> index 0000000000..76ea880d27
> --- /dev/null
> +++ b/ui/console-vc-stubs.c
> @@ -0,0 +1,59 @@
> +/*
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + * QEMU VC stubs
> + */
> +#include "qemu/osdep.h"
> +
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "qemu/option.h"
> +#include "chardev/char.h"
> +#include "ui/console-priv.h"
> +
> +void qemu_text_console_select(QemuTextConsole *c)
> +{
> +}
> +
> +const char * qemu_text_console_get_label(QemuTextConsole *c)
> +{
> +    return NULL;
> +}
> +
> +void qemu_text_console_update_cursor(void)
> +{
> +}
> +
> +void qemu_text_console_handle_keysym(QemuTextConsole *s, int keysym)
> +{
> +}
> +
> +#define TYPE_CHARDEV_VC "chardev-vc"
> +
> +static void vc_chr_parse(QemuOpts *opts, ChardevBackend *backend, Error 
> **errp)
> +{
> +    const char *id = qemu_opts_id(opts);
> +
> +    warn_report("%s: this is a dummy VC driver. "
> +                "Use '-nographic' or a different chardev.", id);
> +}

Why should this be an error_setg() call given we have a errp
parameter, so make this unsupportable config into an error ?
Ignoring invalid user configs is not desirable in general.

> +
> +static void char_vc_class_init(ObjectClass *oc, void *data)
> +{
> +    ChardevClass *cc = CHARDEV_CLASS(oc);
> +
> +    cc->parse = vc_chr_parse;
> +}
> +
> +static const TypeInfo char_vc_type_info = {
> +    .name = TYPE_CHARDEV_VC,
> +    .parent = TYPE_CHARDEV,
> +    .class_init = char_vc_class_init,
> +};
> +
> +void qemu_console_early_init(void)
> +{
> +    /* set the default vc driver */
> +    if (!object_class_by_name(TYPE_CHARDEV_VC)) {
> +        type_register(&char_vc_type_info);
> +    }
> +}
> diff --git a/ui/meson.build b/ui/meson.build
> index 0a1e8272a3..3085e10a72 100644
> --- a/ui/meson.build
> +++ b/ui/meson.build
> @@ -6,7 +6,6 @@ system_ss.add(png)
>  system_ss.add(files(
>    'clipboard.c',
>    'console.c',
> -  'console-vc.c',
>    'cursor.c',
>    'input-keymap.c',
>    'input-legacy.c',
> @@ -19,6 +18,7 @@ system_ss.add(files(
>    'ui-qmp-cmds.c',
>    'util.c',
>  ))
> +system_ss.add(when: pixman, if_true: files('console-vc.c'), if_false: 
> files('console-vc-stubs.c'))
>  if dbus_display
>    system_ss.add(files('dbus-module.c'))
>  endif
> -- 
> 2.41.0
> 
> 

With regards,
Daniel
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