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Tsirkin" , Paolo Bonzini Cc: Gert Wollny , qemu-devel@nongnu.org, Gurchetan Singh , Alyssa Ross , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Alex Deucher , Stefano Stabellini , =?UTF-8?q?Christian=20K=C3=B6nig?= , Xenia Ragiadakou , Pierre-Eric Pelloux-Prayer , Honglei Huang , Julia Zhang , Chen Jiqian , Rob Clark , Yiwei Zhang , Sergio Lopez Pascual Subject: [PATCH v6 02/10] ui/sdl2: Implement dpy dmabuf functions Date: Sun, 26 Jan 2025 23:11:13 +0300 Message-ID: <20250126201121.470990-3-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250126201121.470990-1-dmitry.osipenko@collabora.com> References: <20250126201121.470990-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=136.143.188.112; envelope-from=dmitry.osipenko@collabora.com; helo=sender4-pp-f112.zoho.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.01, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity dmitry.osipenko@collabora.com) X-ZM-MESSAGEID: 1737922447177019000 From: Pierre-Eric Pelloux-Prayer If EGL is used, we can rely on dmabuf to import textures without doing copies. To get this working on X11, we use the existing SDL hint: SDL_HINT_VIDEO_X11_FORCE_EGL (because dmabuf can't be used with GLX). Reviewed-by: Akihiko Odaki Acked-by: Michael S. Tsirkin Tested-by: Alex Benn=C3=A9e Signed-off-by: Pierre-Eric Pelloux-Prayer Signed-off-by: Dmitry Osipenko --- include/ui/sdl2.h | 7 ++++++ meson.build | 6 ++--- ui/sdl2-gl.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++ ui/sdl2.c | 42 +++++++++++++++++++++++++++++++ 4 files changed, 115 insertions(+), 4 deletions(-) diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h index dbe6e3d9739b..9daf5ecffae7 100644 --- a/include/ui/sdl2.h +++ b/include/ui/sdl2.h @@ -45,6 +45,7 @@ struct sdl2_console { bool gui_keysym; SDL_GLContext winctx; QKbdState *kbd; + bool has_dmabuf; #ifdef CONFIG_OPENGL QemuGLShader *gls; egl_fb guest_fb; @@ -96,5 +97,11 @@ void sdl2_gl_scanout_texture(DisplayChangeListener *dcl, void *d3d_tex2d); void sdl2_gl_scanout_flush(DisplayChangeListener *dcl, uint32_t x, uint32_t y, uint32_t w, uint32_t h); +void sdl2_gl_scanout_dmabuf(DisplayChangeListener *dcl, + QemuDmaBuf *dmabuf); +void sdl2_gl_release_dmabuf(DisplayChangeListener *dcl, + QemuDmaBuf *dmabuf); +bool sdl2_gl_has_dmabuf(DisplayChangeListener *dcl); +void sdl2_gl_console_init(struct sdl2_console *scon); =20 #endif /* SDL2_H */ diff --git a/meson.build b/meson.build index 15a066043b7b..dfee104582b0 100644 --- a/meson.build +++ b/meson.build @@ -1964,10 +1964,8 @@ if get_option('gtk') \ endif endif =20 -x11 =3D not_found -if gtkx11.found() - x11 =3D dependency('x11', method: 'pkg-config', required: gtkx11.found()) -endif +x11 =3D dependency('x11', method: 'pkg-config', required: gtkx11.found()) + png =3D not_found if get_option('png').allowed() and have_system png =3D dependency('libpng', version: '>=3D1.6.34', required: get_optio= n('png'), diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c index b1fe96d6af22..8d53e340d40d 100644 --- a/ui/sdl2-gl.c +++ b/ui/sdl2-gl.c @@ -26,6 +26,8 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/main-loop.h" +#include "qemu/error-report.h" #include "ui/console.h" #include "ui/input.h" #include "ui/sdl2.h" @@ -249,3 +251,65 @@ void sdl2_gl_scanout_flush(DisplayChangeListener *dcl, =20 SDL_GL_SwapWindow(scon->real_window); } + +void sdl2_gl_scanout_dmabuf(DisplayChangeListener *dcl, + QemuDmaBuf *dmabuf) +{ + struct sdl2_console *scon =3D container_of(dcl, struct sdl2_console, d= cl); + + assert(scon->opengl); + SDL_GL_MakeCurrent(scon->real_window, scon->winctx); + + egl_dmabuf_import_texture(dmabuf); + if (!qemu_dmabuf_get_texture(dmabuf)) { + error_report("%s: failed fd=3D%d", __func__, qemu_dmabuf_get_fd(dm= abuf)); + return; + } + + sdl2_gl_scanout_texture(dcl, qemu_dmabuf_get_texture(dmabuf), false, + qemu_dmabuf_get_width(dmabuf), + qemu_dmabuf_get_height(dmabuf), + 0, 0, + qemu_dmabuf_get_width(dmabuf), + qemu_dmabuf_get_height(dmabuf), + NULL); + + if (qemu_dmabuf_get_allow_fences(dmabuf)) { + scon->guest_fb.dmabuf =3D dmabuf; + } +} + +void sdl2_gl_release_dmabuf(DisplayChangeListener *dcl, + QemuDmaBuf *dmabuf) +{ + egl_dmabuf_release_texture(dmabuf); +} + +bool sdl2_gl_has_dmabuf(DisplayChangeListener *dcl) +{ + struct sdl2_console *scon =3D container_of(dcl, struct sdl2_console, d= cl); + + return scon->has_dmabuf; +} + +void sdl2_gl_console_init(struct sdl2_console *scon) +{ + bool hidden =3D scon->hidden; + + scon->hidden =3D true; + scon->surface =3D qemu_create_displaysurface(1, 1); + sdl2_window_create(scon); + + /* + * QEMU checks whether console supports dma-buf before switching + * to the console. To break this chicken-egg problem we pre-check + * dma-buf availability beforehand using a dummy SDL window. + */ + scon->has_dmabuf =3D qemu_egl_has_dmabuf(); + + sdl2_window_destroy(scon); + qemu_free_displaysurface(scon->surface); + + scon->surface =3D NULL; + scon->hidden =3D hidden; +} diff --git a/ui/sdl2.c b/ui/sdl2.c index 445eb1dd9f9a..3e262b994231 100644 --- a/ui/sdl2.c +++ b/ui/sdl2.c @@ -36,6 +36,10 @@ #include "qemu/log.h" #include "qemu-main.h" =20 +#ifdef CONFIG_X11 +#include +#endif + static int sdl2_num_outputs; static struct sdl2_console *sdl2_console; =20 @@ -121,6 +125,9 @@ void sdl2_window_create(struct sdl2_console *scon) /* The SDL renderer is only used by sdl2-2D, when OpenGL is disabl= ed */ scon->real_renderer =3D SDL_CreateRenderer(scon->real_window, -1, = 0); } + + qemu_egl_display =3D eglGetCurrentDisplay(); + sdl_update_caption(scon); } =20 @@ -821,6 +828,10 @@ static const DisplayChangeListenerOps dcl_gl_ops =3D { .dpy_gl_scanout_disable =3D sdl2_gl_scanout_disable, .dpy_gl_scanout_texture =3D sdl2_gl_scanout_texture, .dpy_gl_update =3D sdl2_gl_scanout_flush, + + .dpy_gl_scanout_dmabuf =3D sdl2_gl_scanout_dmabuf, + .dpy_gl_release_dmabuf =3D sdl2_gl_release_dmabuf, + .dpy_has_dmabuf =3D sdl2_gl_has_dmabuf, }; =20 static bool @@ -848,6 +859,35 @@ static void sdl2_display_early_init(DisplayOptions *o) } } =20 +static void sdl2_set_hint_x11_force_egl(void) +{ +#if defined(SDL_HINT_VIDEO_X11_FORCE_EGL) && defined(CONFIG_OPENGL) && \ + defined(CONFIG_X11) + Display *x_disp =3D XOpenDisplay(NULL); + EGLDisplay egl_display; + + if (!x_disp) { + return; + } + + /* Prefer EGL over GLX to get dma-buf support. */ + egl_display =3D eglGetDisplay((EGLNativeDisplayType)x_disp); + + if (egl_display !=3D EGL_NO_DISPLAY) { + /* + * Setting X11_FORCE_EGL hint doesn't make SDL to prefer X11 over + * Wayland. SDL will use Wayland driver even if XWayland presents. + * It's always safe to set the hint even if X11 is not used by SDL. + * SDL will work regardless of the hint. + */ + SDL_SetHint(SDL_HINT_VIDEO_X11_FORCE_EGL, "1"); + eglTerminate(egl_display); + } + + XCloseDisplay(x_disp); +#endif +} + static void sdl2_display_init(DisplayState *ds, DisplayOptions *o) { uint8_t data =3D 0; @@ -878,6 +918,7 @@ static void sdl2_display_init(DisplayState *ds, Display= Options *o) SDL_SetHint(SDL_HINT_ALLOW_ALT_TAB_WHILE_GRABBED, "0"); #endif SDL_SetHint(SDL_HINT_WINDOWS_NO_CLOSE_ON_ALT_F4, "1"); + sdl2_set_hint_x11_force_egl(); SDL_EnableScreenSaver(); memset(&info, 0, sizeof(info)); SDL_VERSION(&info.version); @@ -924,6 +965,7 @@ static void sdl2_display_init(DisplayState *ds, Display= Options *o) sdl2_console[i].kbd =3D qkbd_state_init(con); if (display_opengl) { qemu_console_set_display_gl_ctx(con, &sdl2_console[i].dgc); + sdl2_gl_console_init(&sdl2_console[i]); } register_displaychangelistener(&sdl2_console[i].dcl); =20 --=20 2.47.1