Initial import of abandoned HQEMU version 2.5.2HEADmaster

1 files changed, 806 insertions, 0 deletions

diff --git a/src/ui/sdl2.c b/src/ui/sdl2.c
new file mode 100644
index 0000000..5cb75aa
--- /dev/null
+++ b/src/ui/sdl2.c
@@ -0,0 +1,806 @@
+/*
+ * QEMU SDL display driver
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+/* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
+
+#include "qemu-common.h"
+#include "ui/console.h"
+#include "ui/input.h"
+#include "ui/sdl2.h"
+#include "sysemu/sysemu.h"
+
+static int sdl2_num_outputs;
+static struct sdl2_console *sdl2_console;
+
+static SDL_Surface *guest_sprite_surface;
+static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
+
+static int gui_saved_grab;
+static int gui_fullscreen;
+static int gui_noframe;
+static int gui_key_modifier_pressed;
+static int gui_keysym;
+static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
+static SDL_Cursor *sdl_cursor_normal;
+static SDL_Cursor *sdl_cursor_hidden;
+static int absolute_enabled;
+static int guest_cursor;
+static int guest_x, guest_y;
+static SDL_Cursor *guest_sprite;
+static Notifier mouse_mode_notifier;
+
+static void sdl_update_caption(struct sdl2_console *scon);
+
+static struct sdl2_console *get_scon_from_window(uint32_t window_id)
+{
+    int i;
+    for (i = 0; i < sdl2_num_outputs; i++) {
+        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
+            return &sdl2_console[i];
+        }
+    }
+    return NULL;
+}
+
+void sdl2_window_create(struct sdl2_console *scon)
+{
+    int flags = 0;
+
+    if (!scon->surface) {
+        return;
+    }
+    assert(!scon->real_window);
+
+    if (gui_fullscreen) {
+        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
+    } else {
+        flags |= SDL_WINDOW_RESIZABLE;
+    }
+    if (scon->hidden) {
+        flags |= SDL_WINDOW_HIDDEN;
+    }
+
+    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
+                                         SDL_WINDOWPOS_UNDEFINED,
+                                         surface_width(scon->surface),
+                                         surface_height(scon->surface),
+                                         flags);
+    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
+    if (scon->opengl) {
+        scon->winctx = SDL_GL_GetCurrentContext();
+    }
+    sdl_update_caption(scon);
+}
+
+void sdl2_window_destroy(struct sdl2_console *scon)
+{
+    if (!scon->real_window) {
+        return;
+    }
+
+    SDL_DestroyRenderer(scon->real_renderer);
+    scon->real_renderer = NULL;
+    SDL_DestroyWindow(scon->real_window);
+    scon->real_window = NULL;
+}
+
+void sdl2_window_resize(struct sdl2_console *scon)
+{
+    if (!scon->real_window) {
+        return;
+    }
+
+    SDL_SetWindowSize(scon->real_window,
+                      surface_width(scon->surface),
+                      surface_height(scon->surface));
+}
+
+static void sdl2_redraw(struct sdl2_console *scon)
+{
+    if (scon->opengl) {
+#ifdef CONFIG_OPENGL
+        sdl2_gl_redraw(scon);
+#endif
+    } else {
+        sdl2_2d_redraw(scon);
+    }
+}
+
+static void sdl_update_caption(struct sdl2_console *scon)
+{
+    char win_title[1024];
+    char icon_title[1024];
+    const char *status = "";
+
+    if (!runstate_is_running()) {
+        status = " [Stopped]";
+    } else if (gui_grab) {
+        if (alt_grab) {
+            status = " - Press Ctrl-Alt-Shift to exit grab";
+        } else if (ctrl_grab) {
+            status = " - Press Right-Ctrl to exit grab";
+        } else {
+            status = " - Press Ctrl-Alt to exit grab";
+        }
+    }
+
+    if (qemu_name) {
+        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
+                 scon->idx, status);
+        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
+    } else {
+        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
+        snprintf(icon_title, sizeof(icon_title), "QEMU");
+    }
+
+    if (scon->real_window) {
+        SDL_SetWindowTitle(scon->real_window, win_title);
+    }
+}
+
+static void sdl_hide_cursor(void)
+{
+    if (!cursor_hide) {
+        return;
+    }
+
+    if (qemu_input_is_absolute()) {
+        SDL_ShowCursor(1);
+        SDL_SetCursor(sdl_cursor_hidden);
+    } else {
+        SDL_SetRelativeMouseMode(SDL_TRUE);
+    }
+}
+
+static void sdl_show_cursor(void)
+{
+    if (!cursor_hide) {
+        return;
+    }
+
+    if (!qemu_input_is_absolute()) {
+        SDL_SetRelativeMouseMode(SDL_FALSE);
+        SDL_ShowCursor(1);
+        if (guest_cursor &&
+            (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
+            SDL_SetCursor(guest_sprite);
+        } else {
+            SDL_SetCursor(sdl_cursor_normal);
+        }
+    }
+}
+
+static void sdl_grab_start(struct sdl2_console *scon)
+{
+    QemuConsole *con = scon ? scon->dcl.con : NULL;
+
+    if (!con || !qemu_console_is_graphic(con)) {
+        return;
+    }
+    /*
+     * If the application is not active, do not try to enter grab state. This
+     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
+     * application (SDL bug).
+     */
+    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
+        return;
+    }
+    if (guest_cursor) {
+        SDL_SetCursor(guest_sprite);
+        if (!qemu_input_is_absolute() && !absolute_enabled) {
+            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
+        }
+    } else {
+        sdl_hide_cursor();
+    }
+    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
+    gui_grab = 1;
+    sdl_update_caption(scon);
+}
+
+static void sdl_grab_end(struct sdl2_console *scon)
+{
+    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
+    gui_grab = 0;
+    sdl_show_cursor();
+    sdl_update_caption(scon);
+}
+
+static void absolute_mouse_grab(struct sdl2_console *scon)
+{
+    int mouse_x, mouse_y;
+    int scr_w, scr_h;
+    SDL_GetMouseState(&mouse_x, &mouse_y);
+    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
+    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
+        mouse_y > 0 && mouse_y < scr_h - 1) {
+        sdl_grab_start(scon);
+    }
+}
+
+static void sdl_mouse_mode_change(Notifier *notify, void *data)
+{
+    if (qemu_input_is_absolute()) {
+        if (!absolute_enabled) {
+            absolute_enabled = 1;
+            absolute_mouse_grab(&sdl2_console[0]);
+        }
+    } else if (absolute_enabled) {
+        if (!gui_fullscreen) {
+            sdl_grab_end(&sdl2_console[0]);
+        }
+        absolute_enabled = 0;
+    }
+}
+
+static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
+                                 int x, int y, int state)
+{
+    static uint32_t bmap[INPUT_BUTTON_MAX] = {
+        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
+        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
+        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
+    };
+    static uint32_t prev_state;
+
+    if (prev_state != state) {
+        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
+        prev_state = state;
+    }
+
+    if (qemu_input_is_absolute()) {
+        int scr_w, scr_h;
+        int max_w = 0, max_h = 0;
+        int off_x = 0, off_y = 0;
+        int cur_off_x = 0, cur_off_y = 0;
+        int i;
+
+        for (i = 0; i < sdl2_num_outputs; i++) {
+            struct sdl2_console *thiscon = &sdl2_console[i];
+            if (thiscon->real_window && thiscon->surface) {
+                SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
+                cur_off_x = thiscon->x;
+                cur_off_y = thiscon->y;
+                if (scr_w + cur_off_x > max_w) {
+                    max_w = scr_w + cur_off_x;
+                }
+                if (scr_h + cur_off_y > max_h) {
+                    max_h = scr_h + cur_off_y;
+                }
+                if (i == scon->idx) {
+                    off_x = cur_off_x;
+                    off_y = cur_off_y;
+                }
+            }
+        }
+        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
+        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
+    } else {
+        if (guest_cursor) {
+            x -= guest_x;
+            y -= guest_y;
+            guest_x += x;
+            guest_y += y;
+            dx = x;
+            dy = y;
+        }
+        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
+        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
+    }
+    qemu_input_event_sync();
+}
+
+static void toggle_full_screen(struct sdl2_console *scon)
+{
+    gui_fullscreen = !gui_fullscreen;
+    if (gui_fullscreen) {
+        SDL_SetWindowFullscreen(scon->real_window,
+                                SDL_WINDOW_FULLSCREEN_DESKTOP);
+        gui_saved_grab = gui_grab;
+        sdl_grab_start(scon);
+    } else {
+        if (!gui_saved_grab) {
+            sdl_grab_end(scon);
+        }
+        SDL_SetWindowFullscreen(scon->real_window, 0);
+    }
+    sdl2_redraw(scon);
+}
+
+static void handle_keydown(SDL_Event *ev)
+{
+    int mod_state, win;
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+
+    if (alt_grab) {
+        mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
+            (gui_grab_code | KMOD_LSHIFT);
+    } else if (ctrl_grab) {
+        mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
+    } else {
+        mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
+    }
+    gui_key_modifier_pressed = mod_state;
+
+    if (gui_key_modifier_pressed) {
+        switch (ev->key.keysym.scancode) {
+        case SDL_SCANCODE_2:
+        case SDL_SCANCODE_3:
+        case SDL_SCANCODE_4:
+        case SDL_SCANCODE_5:
+        case SDL_SCANCODE_6:
+        case SDL_SCANCODE_7:
+        case SDL_SCANCODE_8:
+        case SDL_SCANCODE_9:
+            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
+            if (win < sdl2_num_outputs) {
+                sdl2_console[win].hidden = !sdl2_console[win].hidden;
+                if (sdl2_console[win].real_window) {
+                    if (sdl2_console[win].hidden) {
+                        SDL_HideWindow(sdl2_console[win].real_window);
+                    } else {
+                        SDL_ShowWindow(sdl2_console[win].real_window);
+                    }
+                }
+                gui_keysym = 1;
+            }
+            break;
+        case SDL_SCANCODE_F:
+            toggle_full_screen(scon);
+            gui_keysym = 1;
+            break;
+        case SDL_SCANCODE_U:
+            sdl2_window_destroy(scon);
+            sdl2_window_create(scon);
+            if (!scon->opengl) {
+                /* re-create scon->texture */
+                sdl2_2d_switch(&scon->dcl, scon->surface);
+            }
+            gui_keysym = 1;
+            break;
+#if 0
+        case SDL_SCANCODE_KP_PLUS:
+        case SDL_SCANCODE_KP_MINUS:
+            if (!gui_fullscreen) {
+                int scr_w, scr_h;
+                int width, height;
+                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
+
+                width = MAX(scr_w + (ev->key.keysym.scancode ==
+                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
+                            160);
+                height = (surface_height(scon->surface) * width) /
+                    surface_width(scon->surface);
+                fprintf(stderr, "%s: scale to %dx%d\n",
+                        __func__, width, height);
+                sdl_scale(scon, width, height);
+                sdl2_redraw(scon);
+                gui_keysym = 1;
+            }
+#endif
+        default:
+            break;
+        }
+    }
+    if (!gui_keysym) {
+        sdl2_process_key(scon, &ev->key);
+    }
+}
+
+static void handle_keyup(SDL_Event *ev)
+{
+    int mod_state;
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+
+    if (!alt_grab) {
+        mod_state = (ev->key.keysym.mod & gui_grab_code);
+    } else {
+        mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
+    }
+    if (!mod_state && gui_key_modifier_pressed) {
+        gui_key_modifier_pressed = 0;
+        if (gui_keysym == 0) {
+            /* exit/enter grab if pressing Ctrl-Alt */
+            if (!gui_grab) {
+                sdl_grab_start(scon);
+            } else if (!gui_fullscreen) {
+                sdl_grab_end(scon);
+            }
+            /* SDL does not send back all the modifiers key, so we must
+             * correct it. */
+            sdl2_reset_keys(scon);
+            return;
+        }
+        gui_keysym = 0;
+    }
+    if (!gui_keysym) {
+        sdl2_process_key(scon, &ev->key);
+    }
+}
+
+static void handle_textinput(SDL_Event *ev)
+{
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+    QemuConsole *con = scon ? scon->dcl.con : NULL;
+
+    if (qemu_console_is_graphic(con)) {
+        return;
+    }
+    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
+}
+
+static void handle_mousemotion(SDL_Event *ev)
+{
+    int max_x, max_y;
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+
+    if (qemu_input_is_absolute() || absolute_enabled) {
+        int scr_w, scr_h;
+        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
+        max_x = scr_w - 1;
+        max_y = scr_h - 1;
+        if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
+                         ev->motion.x == max_x || ev->motion.y == max_y)) {
+            sdl_grab_end(scon);
+        }
+        if (!gui_grab &&
+            (ev->motion.x > 0 && ev->motion.x < max_x &&
+             ev->motion.y > 0 && ev->motion.y < max_y)) {
+            sdl_grab_start(scon);
+        }
+    }
+    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
+        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
+                             ev->motion.x, ev->motion.y, ev->motion.state);
+    }
+}
+
+static void handle_mousebutton(SDL_Event *ev)
+{
+    int buttonstate = SDL_GetMouseState(NULL, NULL);
+    SDL_MouseButtonEvent *bev;
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+
+    bev = &ev->button;
+    if (!gui_grab && !qemu_input_is_absolute()) {
+        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
+            /* start grabbing all events */
+            sdl_grab_start(scon);
+        }
+    } else {
+        if (ev->type == SDL_MOUSEBUTTONDOWN) {
+            buttonstate |= SDL_BUTTON(bev->button);
+        } else {
+            buttonstate &= ~SDL_BUTTON(bev->button);
+        }
+        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
+    }
+}
+
+static void handle_mousewheel(SDL_Event *ev)
+{
+    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
+    SDL_MouseWheelEvent *wev = &ev->wheel;
+    InputButton btn;
+
+    if (wev->y > 0) {
+        btn = INPUT_BUTTON_WHEEL_UP;
+    } else if (wev->y < 0) {
+        btn = INPUT_BUTTON_WHEEL_DOWN;
+    } else {
+        return;
+    }
+
+    qemu_input_queue_btn(scon->dcl.con, btn, true);
+    qemu_input_event_sync();
+    qemu_input_queue_btn(scon->dcl.con, btn, false);
+    qemu_input_event_sync();
+}
+
+static void handle_windowevent(SDL_Event *ev)
+{
+    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
+
+    if (!scon) {
+        return;
+    }
+
+    switch (ev->window.event) {
+    case SDL_WINDOWEVENT_RESIZED:
+        {
+            QemuUIInfo info;
+            memset(&info, 0, sizeof(info));
+            info.width = ev->window.data1;
+            info.height = ev->window.data2;
+            dpy_set_ui_info(scon->dcl.con, &info);
+        }
+        sdl2_redraw(scon);
+        break;
+    case SDL_WINDOWEVENT_EXPOSED:
+        sdl2_redraw(scon);
+        break;
+    case SDL_WINDOWEVENT_FOCUS_GAINED:
+    case SDL_WINDOWEVENT_ENTER:
+        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
+            absolute_mouse_grab(scon);
+        }
+        break;
+    case SDL_WINDOWEVENT_FOCUS_LOST:
+        if (gui_grab && !gui_fullscreen) {
+            sdl_grab_end(scon);
+        }
+        break;
+    case SDL_WINDOWEVENT_RESTORED:
+        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
+        break;
+    case SDL_WINDOWEVENT_MINIMIZED:
+        update_displaychangelistener(&scon->dcl, 500);
+        break;
+    case SDL_WINDOWEVENT_CLOSE:
+        if (!no_quit) {
+            no_shutdown = 0;
+            qemu_system_shutdown_request();
+        }
+        break;
+    case SDL_WINDOWEVENT_SHOWN:
+        if (scon->hidden) {
+            SDL_HideWindow(scon->real_window);
+        }
+        break;
+    case SDL_WINDOWEVENT_HIDDEN:
+        if (!scon->hidden) {
+            SDL_ShowWindow(scon->real_window);
+        }
+        break;
+    }
+}
+
+void sdl2_poll_events(struct sdl2_console *scon)
+{
+    SDL_Event ev1, *ev = &ev1;
+
+    if (scon->last_vm_running != runstate_is_running()) {
+        scon->last_vm_running = runstate_is_running();
+        sdl_update_caption(scon);
+    }
+
+    while (SDL_PollEvent(ev)) {
+        switch (ev->type) {
+        case SDL_KEYDOWN:
+            handle_keydown(ev);
+            break;
+        case SDL_KEYUP:
+            handle_keyup(ev);
+            break;
+        case SDL_TEXTINPUT:
+            handle_textinput(ev);
+            break;
+        case SDL_QUIT:
+            if (!no_quit) {
+                no_shutdown = 0;
+                qemu_system_shutdown_request();
+            }
+            break;
+        case SDL_MOUSEMOTION:
+            handle_mousemotion(ev);
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+        case SDL_MOUSEBUTTONUP:
+            handle_mousebutton(ev);
+            break;
+        case SDL_MOUSEWHEEL:
+            handle_mousewheel(ev);
+            break;
+        case SDL_WINDOWEVENT:
+            handle_windowevent(ev);
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+static void sdl_mouse_warp(DisplayChangeListener *dcl,
+                           int x, int y, int on)
+{
+    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+    if (on) {
+        if (!guest_cursor) {
+            sdl_show_cursor();
+        }
+        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
+            SDL_SetCursor(guest_sprite);
+            if (!qemu_input_is_absolute() && !absolute_enabled) {
+                SDL_WarpMouseInWindow(scon->real_window, x, y);
+            }
+        }
+    } else if (gui_grab) {
+        sdl_hide_cursor();
+    }
+    guest_cursor = on;
+    guest_x = x, guest_y = y;
+}
+
+static void sdl_mouse_define(DisplayChangeListener *dcl,
+                             QEMUCursor *c)
+{
+
+    if (guest_sprite) {
+        SDL_FreeCursor(guest_sprite);
+    }
+
+    if (guest_sprite_surface) {
+        SDL_FreeSurface(guest_sprite_surface);
+    }
+
+    guest_sprite_surface =
+        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
+                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
+
+    if (!guest_sprite_surface) {
+        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
+        return;
+    }
+    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
+                                         c->hot_x, c->hot_y);
+    if (!guest_sprite) {
+        fprintf(stderr, "Failed to make color cursor from %p\n", c);
+        return;
+    }
+    if (guest_cursor &&
+        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
+        SDL_SetCursor(guest_sprite);
+    }
+}
+
+static void sdl_cleanup(void)
+{
+    if (guest_sprite) {
+        SDL_FreeCursor(guest_sprite);
+    }
+    SDL_QuitSubSystem(SDL_INIT_VIDEO);
+}
+
+static const DisplayChangeListenerOps dcl_2d_ops = {
+    .dpy_name             = "sdl2-2d",
+    .dpy_gfx_update       = sdl2_2d_update,
+    .dpy_gfx_switch       = sdl2_2d_switch,
+    .dpy_gfx_check_format = sdl2_2d_check_format,
+    .dpy_refresh          = sdl2_2d_refresh,
+    .dpy_mouse_set        = sdl_mouse_warp,
+    .dpy_cursor_define    = sdl_mouse_define,
+};
+
+#ifdef CONFIG_OPENGL
+static const DisplayChangeListenerOps dcl_gl_ops = {
+    .dpy_name                = "sdl2-gl",
+    .dpy_gfx_update          = sdl2_gl_update,
+    .dpy_gfx_switch          = sdl2_gl_switch,
+    .dpy_gfx_check_format    = console_gl_check_format,
+    .dpy_refresh             = sdl2_gl_refresh,
+    .dpy_mouse_set           = sdl_mouse_warp,
+    .dpy_cursor_define       = sdl_mouse_define,
+};
+#endif
+
+void sdl_display_early_init(int opengl)
+{
+    switch (opengl) {
+    case -1: /* default */
+    case 0:  /* off */
+        break;
+    case 1: /* on */
+#ifdef CONFIG_OPENGL
+        display_opengl = 1;
+#endif
+        break;
+    default:
+        g_assert_not_reached();
+        break;
+    }
+}
+
+void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
+{
+    int flags;
+    uint8_t data = 0;
+    char *filename;
+    int i;
+
+    if (no_frame) {
+        gui_noframe = 1;
+    }
+
+#ifdef __linux__
+    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
+     * accessible $DISPLAY to open X11 window.  This is often the case
+     * when qemu is run using sudo.  But in this case, and when actually
+     * run in X11 environment, SDL fights with X11 for the video card,
+     * making current display unavailable, often until reboot.
+     * So make x11 the default SDL video driver if this variable is unset.
+     * This is a bit hackish but saves us from bigger problem.
+     * Maybe it's a good idea to fix this in SDL instead.
+     */
+    setenv("SDL_VIDEODRIVER", "x11", 0);
+#endif
+
+    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
+    if (SDL_Init(flags)) {
+        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
+                SDL_GetError());
+        exit(1);
+    }
+    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
+
+    for (i = 0;; i++) {
+        QemuConsole *con = qemu_console_lookup_by_index(i);
+        if (!con) {
+            break;
+        }
+    }
+    sdl2_num_outputs = i;
+    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
+    for (i = 0; i < sdl2_num_outputs; i++) {
+        QemuConsole *con = qemu_console_lookup_by_index(i);
+        if (!qemu_console_is_graphic(con)) {
+            sdl2_console[i].hidden = true;
+        }
+        sdl2_console[i].idx = i;
+#ifdef CONFIG_OPENGL
+        sdl2_console[i].opengl = display_opengl;
+        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
+#else
+        sdl2_console[i].opengl = 0;
+        sdl2_console[i].dcl.ops = &dcl_2d_ops;
+#endif
+        sdl2_console[i].dcl.con = con;
+        register_displaychangelistener(&sdl2_console[i].dcl);
+    }
+
+    /* Load a 32x32x4 image. White pixels are transparent. */
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
+    if (filename) {
+        SDL_Surface *image = SDL_LoadBMP(filename);
+        if (image) {
+            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
+            SDL_SetColorKey(image, SDL_TRUE, colorkey);
+            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
+        }
+        g_free(filename);
+    }
+
+    if (full_screen) {
+        gui_fullscreen = 1;
+        sdl_grab_start(0);
+    }
+
+    mouse_mode_notifier.notify = sdl_mouse_mode_change;
+    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
+
+    gui_grab = 0;
+
+    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
+    sdl_cursor_normal = SDL_GetCursor();
+
+    atexit(sdl_cleanup);
+}