qemu/ui/gtk-egl.c
Marc-André Lureau 3cddb8b9e0 display/ui: add a callback to indicate GL state is flushed
Displaying rendered resources requires blocking qemu GPU to avoid extra
framebuffer copies. For an external display, via Spice currently, there
is a callback to block/unblock the rendering in the same thread.

But with the vhost-user-gpu backend, the qemu process doesn't handle
the rendering itself, and the blocking callback isn't effective.
Instead, the backend must be notified when the display code is done.

Fix this by adding a new GraphicHwOps callback to indicate the GL state
is flushed, and we are done manipulating the shared GL resources. Call
it from gtk and spice display.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-19-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2021-02-04 15:58:54 +01:00

315 lines
8.7 KiB
C

/*
* GTK UI -- egl opengl code.
*
* Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget,
* which is GtkDrawingArea like widget with opengl rendering support.
*
* This code handles opengl support on older gtk versions, using egl
* to get a opengl context for the X11 window.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "trace.h"
#include "ui/console.h"
#include "ui/gtk.h"
#include "ui/egl-helpers.h"
#include "ui/shader.h"
#include "sysemu/sysemu.h"
static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
{
if (vc->gfx.scanout_mode == scanout) {
return;
}
vc->gfx.scanout_mode = scanout;
if (!vc->gfx.scanout_mode) {
egl_fb_destroy(&vc->gfx.guest_fb);
if (vc->gfx.surface) {
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
}
/** DisplayState Callbacks (opengl version) **/
void gd_egl_init(VirtualConsole *vc)
{
GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
if (!gdk_window) {
return;
}
Window x11_window = gdk_x11_window_get_xid(gdk_window);
if (!x11_window) {
return;
}
vc->gfx.ectx = qemu_egl_init_ctx();
vc->gfx.esurface = qemu_egl_init_surface_x11
(vc->gfx.ectx, (EGLNativeWindowType)x11_window);
assert(vc->gfx.esurface);
}
void gd_egl_draw(VirtualConsole *vc)
{
GdkWindow *window;
int ww, wh;
if (!vc->gfx.gls) {
return;
}
window = gtk_widget_get_window(vc->gfx.drawing_area);
ww = gdk_window_get_width(window);
wh = gdk_window_get_height(window);
if (vc->gfx.scanout_mode) {
gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
vc->gfx.scale_x = (double)ww / vc->gfx.w;
vc->gfx.scale_y = (double)wh / vc->gfx.h;
} else {
if (!vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
}
glFlush();
graphic_hw_gl_flushed(vc->gfx.dcl.con);
}
void gd_egl_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (!vc->gfx.gls || !vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
vc->gfx.glupdates++;
}
void gd_egl_refresh(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.dcl.update_interval = gd_monitor_update_interval(
vc->window ? vc->window : vc->gfx.drawing_area);
if (!vc->gfx.esurface) {
gd_egl_init(vc);
if (!vc->gfx.esurface) {
return;
}
vc->gfx.gls = qemu_gl_init_shader();
if (vc->gfx.ds) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
graphic_hw_update(dcl->con);
if (vc->gfx.glupdates) {
vc->gfx.glupdates = 0;
gtk_egl_set_scanout_mode(vc, false);
gd_egl_draw(vc);
}
}
void gd_egl_switch(DisplayChangeListener *dcl,
DisplaySurface *surface)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
bool resized = true;
trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
if (vc->gfx.ds &&
surface_width(vc->gfx.ds) == surface_width(surface) &&
surface_height(vc->gfx.ds) == surface_height(surface)) {
resized = false;
}
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
vc->gfx.ds = surface;
if (vc->gfx.gls) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
if (resized) {
gd_update_windowsize(vc);
}
}
QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
QEMUGLParams *params)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
return qemu_egl_create_context(dcl, params);
}
void gd_egl_scanout_disable(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.w = 0;
vc->gfx.h = 0;
gtk_egl_set_scanout_mode(vc, false);
}
void gd_egl_scanout_texture(DisplayChangeListener *dcl,
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 w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.x = x;
vc->gfx.y = y;
vc->gfx.w = w;
vc->gfx.h = h;
vc->gfx.y0_top = backing_y_0_top;
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
gtk_egl_set_scanout_mode(vc, true);
egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
backing_id, false);
}
void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf)
{
#ifdef CONFIG_OPENGL_DMABUF
egl_dmabuf_import_texture(dmabuf);
if (!dmabuf->texture) {
return;
}
gd_egl_scanout_texture(dcl, dmabuf->texture,
false, dmabuf->width, dmabuf->height,
0, 0, dmabuf->width, dmabuf->height);
#endif
}
void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf, bool have_hot,
uint32_t hot_x, uint32_t hot_y)
{
#ifdef CONFIG_OPENGL_DMABUF
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (dmabuf) {
egl_dmabuf_import_texture(dmabuf);
if (!dmabuf->texture) {
return;
}
egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
dmabuf->texture, false);
} else {
egl_fb_destroy(&vc->gfx.cursor_fb);
}
#endif
}
void gd_egl_cursor_position(DisplayChangeListener *dcl,
uint32_t pos_x, uint32_t pos_y)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
}
void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf)
{
#ifdef CONFIG_OPENGL_DMABUF
egl_dmabuf_release_texture(dmabuf);
#endif
}
void gd_egl_scanout_flush(DisplayChangeListener *dcl,
uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
GdkWindow *window;
int ww, wh;
if (!vc->gfx.scanout_mode) {
return;
}
if (!vc->gfx.guest_fb.framebuffer) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
window = gtk_widget_get_window(vc->gfx.drawing_area);
ww = gdk_window_get_width(window);
wh = gdk_window_get_height(window);
egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
if (vc->gfx.cursor_fb.texture) {
egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
vc->gfx.y0_top);
egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
vc->gfx.y0_top,
vc->gfx.cursor_x, vc->gfx.cursor_y,
vc->gfx.scale_x, vc->gfx.scale_y);
} else {
egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
}
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
void gtk_egl_init(DisplayGLMode mode)
{
GdkDisplay *gdk_display = gdk_display_get_default();
Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
return;
}
display_opengl = 1;
}
int gd_egl_make_current(DisplayChangeListener *dcl,
QEMUGLContext ctx)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, ctx);
}