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FRET-qemu/ui/gtk-egl.c
Cédric Le Goater 3dba3c0b25 ui/console: Only declare variable fence_fd when CONFIG_GBM is defined 
This to avoid a build breakage :

../ui/gtk-egl.c: In function ‘gd_egl_draw’:
../ui/gtk-egl.c:73:9: error: unused variable ‘fence_fd’ [-Werror=unused-variable]
   73 |     int fence_fd;
      |         ^~~~~~~~

Fixes: fa6426805b12 ("ui/console: Use qemu_dmabuf_set_..() helpers instead")
Cc: Dongwon Kim <dongwon.kim@intel.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240515100520.574383-1-clg@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-05-17 16:49:04 +02:00

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/*
* 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 "qemu/main-loop.h"
#include "qemu/error-report.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) {
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
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;
#ifdef CONFIG_GBM
QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
int fence_fd;
#endif
int ww, wh, ws;
if (!vc->gfx.gls) {
return;
}
window = gtk_widget_get_window(vc->gfx.drawing_area);
ws = gdk_window_get_scale_factor(window);
ww = gdk_window_get_width(window) * ws;
wh = gdk_window_get_height(window) * ws;
if (vc->gfx.scanout_mode) {
#ifdef CONFIG_GBM
if (dmabuf) {
if (!qemu_dmabuf_get_draw_submitted(dmabuf)) {
return;
} else {
qemu_dmabuf_set_draw_submitted(dmabuf, false);
}
}
#endif
gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
glFlush();
#ifdef CONFIG_GBM
if (dmabuf) {
egl_dmabuf_create_fence(dmabuf);
fence_fd = qemu_dmabuf_get_fence_fd(dmabuf);
if (fence_fd >= 0) {
qemu_set_fd_handler(fence_fd, gd_hw_gl_flushed, NULL, vc);
return;
}
graphic_hw_gl_block(vc->gfx.dcl.con, false);
}
#endif
} 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();
}
}
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++;
eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
void gd_egl_refresh(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
gd_update_monitor_refresh_rate(
vc, vc->window ? vc->window : vc->gfx.drawing_area);
if (vc->gfx.guest_fb.dmabuf &&
qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
gd_egl_draw(vc);
return;
}
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_destroy_texture(vc->gfx.gls, vc->gfx.ds);
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
#ifdef CONFIG_GBM
if (vc->gfx.guest_fb.dmabuf) {
egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
}
#endif
}
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;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
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);
}
eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
}
QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
QEMUGLParams *params)
{
VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
return qemu_egl_create_context(dgc, 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,
void *d3d_tex2d)
{
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;
if (!vc->gfx.esurface) {
gd_egl_init(vc);
if (!vc->gfx.esurface) {
return;
}
}
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_GBM
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
uint32_t x, y, width, height, backing_width, backing_height, texture;
bool y0_top;
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
egl_dmabuf_import_texture(dmabuf);
texture = qemu_dmabuf_get_texture(dmabuf);
if (!texture) {
return;
}
x = qemu_dmabuf_get_x(dmabuf);
y = qemu_dmabuf_get_y(dmabuf);
width = qemu_dmabuf_get_width(dmabuf);
height = qemu_dmabuf_get_height(dmabuf);
backing_width = qemu_dmabuf_get_backing_width(dmabuf);
backing_height = qemu_dmabuf_get_backing_height(dmabuf);
y0_top = qemu_dmabuf_get_y0_top(dmabuf);
gd_egl_scanout_texture(dcl, texture, y0_top, backing_width, backing_height,
x, y, width, height, NULL);
if (qemu_dmabuf_get_allow_fences(dmabuf)) {
vc->gfx.guest_fb.dmabuf = dmabuf;
}
#endif
}
void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf, bool have_hot,
uint32_t hot_x, uint32_t hot_y)
{
#ifdef CONFIG_GBM
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
uint32_t backing_width, backing_height, texture;
if (dmabuf) {
egl_dmabuf_import_texture(dmabuf);
texture = qemu_dmabuf_get_texture(dmabuf);
if (!texture) {
return;
}
backing_width = qemu_dmabuf_get_backing_width(dmabuf);
backing_height = qemu_dmabuf_get_backing_height(dmabuf);
egl_fb_setup_for_tex(&vc->gfx.cursor_fb, backing_width, backing_height,
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_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, ws;
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);
ws = gdk_window_get_scale_factor(window);
ww = gdk_window_get_width(window) * ws;
wh = gdk_window_get_height(window) * ws;
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);
}
#ifdef CONFIG_GBM
if (vc->gfx.guest_fb.dmabuf) {
egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
}
#endif
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
void gd_egl_flush(DisplayChangeListener *dcl,
uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
GtkWidget *area = vc->gfx.drawing_area;
if (vc->gfx.guest_fb.dmabuf &&
!qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
graphic_hw_gl_block(vc->gfx.dcl.con, true);
qemu_dmabuf_set_draw_submitted(vc->gfx.guest_fb.dmabuf, true);
gtk_egl_set_scanout_mode(vc, true);
gtk_widget_queue_draw_area(area, x, y, w, h);
return;
}
gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
}
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(DisplayGLCtx *dgc,
QEMUGLContext ctx)
{
VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, ctx)) {
error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
return -1;
}
return 0;
}
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