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ui/gtk: skip any extra draw of same guest scanout blob res

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Any extra draw call for the same blob resource representing guest scanout
before the previous drawing is not finished can break synchronous draw
sequence. To prevent this, drawing is now done only once for each draw
submission (when draw_submitted == true).

v2:
 - removed mutex
 - updated commit msg

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Message-Id: <20210924225105.24930-1-dongwon.kim@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Dongwon Kim 2021-09-24 15:51:05 -07:00 • committed by Gerd Hoffmann
parent 760deab30e
commit 55f4b767f6
4 changed files with 59 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

49
ui/gtk-gl-area.c
View file

@ -38,6 +38,9 @@ static void gtk_gl_area_set_scanout_mode(VirtualConsole *vc, bool scanout)
void gd_gl_area_draw(VirtualConsole *vc)
{
#ifdef CONFIG_GBM
QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
#endif
int ww, wh, y1, y2;
if (!vc->gfx.gls) {
@ -53,6 +56,16 @@ void gd_gl_area_draw(VirtualConsole *vc)
return;
}
#ifdef CONFIG_GBM
if (dmabuf) {
if (!dmabuf->draw_submitted) {
return;
} else {
dmabuf->draw_submitted = false;
}
}
#endif
glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
/* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
@ -62,6 +75,22 @@ void gd_gl_area_draw(VirtualConsole *vc)
glBlitFramebuffer(0, y1, vc->gfx.w, y2,
0, 0, ww, wh,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
#ifdef CONFIG_GBM
if (dmabuf) {
egl_dmabuf_create_sync(dmabuf);
}
#endif
glFlush();
#ifdef CONFIG_GBM
if (dmabuf) {
egl_dmabuf_create_fence(dmabuf);
if (dmabuf->fence_fd > 0) {
qemu_set_fd_handler(dmabuf->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;
@ -72,25 +101,6 @@ void gd_gl_area_draw(VirtualConsole *vc)
surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
}
#ifdef CONFIG_GBM
if (vc->gfx.guest_fb.dmabuf) {
egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
}
#endif
glFlush();
#ifdef CONFIG_GBM
if (vc->gfx.guest_fb.dmabuf) {
QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
egl_dmabuf_create_fence(dmabuf);
if (dmabuf->fence_fd > 0) {
qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
return;
}
graphic_hw_gl_block(vc->gfx.dcl.con, false);
}
#endif
graphic_hw_gl_flushed(vc->gfx.dcl.con);
}
@ -237,6 +247,7 @@ void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
if (vc->gfx.guest_fb.dmabuf) {
graphic_hw_gl_block(vc->gfx.dcl.con, true);
vc->gfx.guest_fb.dmabuf->draw_submitted = true;
}
gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
}