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console: save current scanout details

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Add a new DisplayScanout structure to save the current scanout details.
This allows to attach later UI backends and set the scanout.

Introduce displaychangelistener_display_console() helper function to
handle the dpy_gfx_switch/gl_scanout() & dpy_gfx_update() calls.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2021-02-20 16:23:03 +04:00
parent f6ef71bded
commit ebced09185
2 changed files with 138 additions and 54 deletions
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27
include/ui/console.h
View File

@ -108,6 +108,17 @@ struct QemuConsoleClass {
#define QEMU_ALLOCATED_FLAG 0x01
#define QEMU_PLACEHOLDER_FLAG 0x02
typedef struct ScanoutTexture {
uint32_t backing_id;
bool backing_y_0_top;
uint32_t backing_width;
uint32_t backing_height;
uint32_t x;
uint32_t y;
uint32_t width;
uint32_t height;
} ScanoutTexture;
typedef struct DisplaySurface {
pixman_format_code_t format;
pixman_image_t *image;
@ -178,6 +189,22 @@ typedef struct QemuDmaBuf {
bool draw_submitted;
} QemuDmaBuf;
enum display_scanout {
SCANOUT_NONE,
SCANOUT_SURFACE,
SCANOUT_TEXTURE,
SCANOUT_DMABUF,
};
typedef struct DisplayScanout {
enum display_scanout kind;
union {
/* DisplaySurface *surface; is kept in QemuConsole */
ScanoutTexture texture;
QemuDmaBuf *dmabuf;
};
} DisplayScanout;
typedef struct DisplayState DisplayState;
typedef struct DisplayGLCtx DisplayGLCtx;

165
ui/console.c
View File

@ -77,6 +77,7 @@ struct QemuConsole {
console_type_t console_type;
DisplayState *ds;
DisplaySurface *surface;
DisplayScanout scanout;
int dcls;
DisplayGLCtx *gl;
int gl_block;
@ -146,6 +147,7 @@ static void dpy_refresh(DisplayState *s);
static DisplayState *get_alloc_displaystate(void);
static void text_console_update_cursor_timer(void);
static void text_console_update_cursor(void *opaque);
static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl);
static void gui_update(void *opaque)
{
@ -481,6 +483,8 @@ static void text_console_resize(QemuConsole *s)
TextCell *cells, *c, *c1;
int w1, x, y, last_width;
assert(s->scanout.kind == SCANOUT_SURFACE);
last_width = s->width;
s->width = surface_width(s->surface) / FONT_WIDTH;
s->height = surface_height(s->surface) / FONT_HEIGHT;
@ -1052,6 +1056,48 @@ static void console_putchar(QemuConsole *s, int ch)
}
}
static void displaychangelistener_display_console(DisplayChangeListener *dcl,
QemuConsole *con)
{
static const char nodev[] =
"This VM has no graphic display device.";
static DisplaySurface *dummy;
if (!con) {
if (!dcl->ops->dpy_gfx_switch) {
return;
}
if (!dummy) {
dummy = qemu_create_placeholder_surface(640, 480, nodev);
}
dcl->ops->dpy_gfx_switch(dcl, dummy);
return;
}
if (con->scanout.kind == SCANOUT_DMABUF &&
displaychangelistener_has_dmabuf(dcl)) {
dcl->ops->dpy_gl_scanout_dmabuf(dcl, con->scanout.dmabuf);
} else if (con->scanout.kind == SCANOUT_TEXTURE &&
dcl->ops->dpy_gl_scanout_texture) {
dcl->ops->dpy_gl_scanout_texture(dcl,
con->scanout.texture.backing_id,
con->scanout.texture.backing_y_0_top,
con->scanout.texture.backing_width,
con->scanout.texture.backing_height,
con->scanout.texture.x,
con->scanout.texture.y,
con->scanout.texture.width,
con->scanout.texture.height);
} else if (con->scanout.kind == SCANOUT_SURFACE &&
dcl->ops->dpy_gfx_switch) {
dcl->ops->dpy_gfx_switch(dcl, con->surface);
}
dcl->ops->dpy_gfx_update(dcl, 0, 0,
qemu_console_get_width(con, 0),
qemu_console_get_height(con, 0));
}
void console_select(unsigned int index)
{
DisplayChangeListener *dcl;
@ -1068,13 +1114,7 @@ void console_select(unsigned int index)
if (dcl->con != NULL) {
continue;
}
if (dcl->ops->dpy_gfx_switch) {
dcl->ops->dpy_gfx_switch(dcl, s->surface);
}
}
if (s->surface) {
dpy_gfx_update(s, 0, 0, surface_width(s->surface),
surface_height(s->surface));
displaychangelistener_display_console(dcl, s);
}
}
if (ds->have_text) {
@ -1480,9 +1520,6 @@ static bool dpy_gl_compatible_with(QemuConsole *con, DisplayChangeListener *dcl)
void register_displaychangelistener(DisplayChangeListener *dcl)
{
static const char nodev[] =
"This VM has no graphic display device.";
static DisplaySurface *dummy;
QemuConsole *con;
assert(!dcl->ds);
@ -1507,16 +1544,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
} else {
con = active_console;
}
if (dcl->ops->dpy_gfx_switch) {
if (con) {
dcl->ops->dpy_gfx_switch(dcl, con->surface);
} else {
if (!dummy) {
dummy = qemu_create_placeholder_surface(640, 480, nodev);
}
dcl->ops->dpy_gfx_switch(dcl, dummy);
}
}
displaychangelistener_display_console(dcl, con);
text_console_update_cursor(NULL);
}
@ -1597,13 +1625,9 @@ void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
{
DisplayState *s = con->ds;
DisplayChangeListener *dcl;
int width = w;
int height = h;
int width = qemu_console_get_width(con, x + w);
int height = qemu_console_get_height(con, y + h);
if (con->surface) {
width = surface_width(con->surface);
height = surface_height(con->surface);
}
x = MAX(x, 0);
y = MAX(y, 0);
x = MIN(x, width);
@ -1626,12 +1650,10 @@ void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
void dpy_gfx_update_full(QemuConsole *con)
{
if (!con->surface) {
return;
}
dpy_gfx_update(con, 0, 0,
surface_width(con->surface),
surface_height(con->surface));
int w = qemu_console_get_width(con, 0);
int h = qemu_console_get_height(con, 0);
dpy_gfx_update(con, 0, 0, w, h);
}
void dpy_gfx_replace_surface(QemuConsole *con,
@ -1658,6 +1680,7 @@ void dpy_gfx_replace_surface(QemuConsole *con,
assert(old_surface != surface);
con->scanout.kind = SCANOUT_SURFACE;
con->surface = surface;
QLIST_FOREACH(dcl, &s->listeners, next) {
if (con != (dcl->con ? dcl->con : active_console)) {
@ -1833,6 +1856,9 @@ void dpy_gl_scanout_disable(QemuConsole *con)
DisplayState *s = con->ds;
DisplayChangeListener *dcl;
if (con->scanout.kind != SCANOUT_SURFACE) {
con->scanout.kind = SCANOUT_NONE;
}
QLIST_FOREACH(dcl, &s->listeners, next) {
dcl->ops->dpy_gl_scanout_disable(dcl);
}
@ -1849,6 +1875,11 @@ void dpy_gl_scanout_texture(QemuConsole *con,
DisplayState *s = con->ds;
DisplayChangeListener *dcl;
con->scanout.kind = SCANOUT_TEXTURE;
con->scanout.texture = (ScanoutTexture) {
backing_id, backing_y_0_top, backing_width, backing_height,
x, y, width, height
};
QLIST_FOREACH(dcl, &s->listeners, next) {
dcl->ops->dpy_gl_scanout_texture(dcl, backing_id,
backing_y_0_top,
@ -1863,6 +1894,8 @@ void dpy_gl_scanout_dmabuf(QemuConsole *con,
DisplayState *s = con->ds;
DisplayChangeListener *dcl;
con->scanout.kind = SCANOUT_DMABUF;
con->scanout.dmabuf = dmabuf;
QLIST_FOREACH(dcl, &s->listeners, next) {
dcl->ops->dpy_gl_scanout_dmabuf(dcl, dmabuf);
}
@ -1989,10 +2022,8 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
s = qemu_console_lookup_unused();
if (s) {
trace_console_gfx_reuse(s->index);
if (s->surface) {
width = surface_width(s->surface);
height = surface_height(s->surface);
}
width = qemu_console_get_width(s, 0);
height = qemu_console_get_height(s, 0);
} else {
trace_console_gfx_new();
s = new_console(ds, GRAPHIC_CONSOLE, head);
@ -2021,13 +2052,8 @@ void graphic_console_close(QemuConsole *con)
static const char unplugged[] =
"Guest display has been unplugged";
DisplaySurface *surface;
int width = 640;
int height = 480;
if (con->surface) {
width = surface_width(con->surface);
height = surface_height(con->surface);
}
int width = qemu_console_get_width(con, 640);
int height = qemu_console_get_height(con, 480);
trace_console_gfx_close(con->index);
object_property_set_link(OBJECT(con), "device", NULL, &error_abort);
@ -2179,7 +2205,19 @@ int qemu_console_get_width(QemuConsole *con, int fallback)
if (con == NULL) {
con = active_console;
}
return con ? surface_width(con->surface) : fallback;
if (con == NULL) {
return fallback;
}
switch (con->scanout.kind) {
case SCANOUT_DMABUF:
return con->scanout.dmabuf->width;
case SCANOUT_TEXTURE:
return con->scanout.texture.width;
case SCANOUT_SURFACE:
return surface_width(con->surface);
default:
return fallback;
}
}
int qemu_console_get_height(QemuConsole *con, int fallback)
@ -2187,7 +2225,19 @@ int qemu_console_get_height(QemuConsole *con, int fallback)
if (con == NULL) {
con = active_console;
}
return con ? surface_height(con->surface) : fallback;
if (con == NULL) {
return fallback;
}
switch (con->scanout.kind) {
case SCANOUT_DMABUF:
return con->scanout.dmabuf->height;
case SCANOUT_TEXTURE:
return con->scanout.texture.height;
case SCANOUT_SURFACE:
return surface_height(con->surface);
default:
return fallback;
}
}
static void vc_chr_accept_input(Chardev *chr)
@ -2253,12 +2303,13 @@ static void text_console_do_init(Chardev *chr, DisplayState *ds)
s->total_height = DEFAULT_BACKSCROLL;
s->x = 0;
s->y = 0;
if (!s->surface) {
if (active_console && active_console->surface) {
g_width = surface_width(active_console->surface);
g_height = surface_height(active_console->surface);
if (s->scanout.kind != SCANOUT_SURFACE) {
if (active_console && active_console->scanout.kind == SCANOUT_SURFACE) {
g_width = qemu_console_get_width(active_console, g_width);
g_height = qemu_console_get_height(active_console, g_height);
}
s->surface = qemu_create_displaysurface(g_width, g_height);
s->scanout.kind = SCANOUT_SURFACE;
}
s->hw_ops = &text_console_ops;
@ -2317,6 +2368,7 @@ static void vc_chr_open(Chardev *chr,
s = new_console(NULL, TEXT_CONSOLE, 0);
} else {
s = new_console(NULL, TEXT_CONSOLE_FIXED_SIZE, 0);
s->scanout.kind = SCANOUT_SURFACE;
s->surface = qemu_create_displaysurface(width, height);
}
@ -2340,13 +2392,13 @@ static void vc_chr_open(Chardev *chr,
void qemu_console_resize(QemuConsole *s, int width, int height)
{
DisplaySurface *surface;
DisplaySurface *surface = qemu_console_surface(s);
assert(s->console_type == GRAPHIC_CONSOLE);
if (s->surface && (s->surface->flags & QEMU_ALLOCATED_FLAG) &&
pixman_image_get_width(s->surface->image) == width &&
pixman_image_get_height(s->surface->image) == height) {
if (surface && (surface->flags & QEMU_ALLOCATED_FLAG) &&
pixman_image_get_width(surface->image) == width &&
pixman_image_get_height(surface->image) == height) {
return;
}
@ -2356,7 +2408,12 @@ void qemu_console_resize(QemuConsole *s, int width, int height)
DisplaySurface *qemu_console_surface(QemuConsole *console)
{
return console->surface;
switch (console->scanout.kind) {
case SCANOUT_SURFACE:
return console->surface;
default:
return NULL;
}
}
PixelFormat qemu_default_pixelformat(int bpp)