qemu

console.c (78628B)

---

 /*
  * QEMU graphical console
  *
  * Copyright (c) 2004 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.
  */
 
 #include "qemu/osdep.h"
 #include "ui/console.h"
 #include "hw/qdev-core.h"
 #include "qapi/error.h"
 #include "qapi/qapi-commands-ui.h"
 #include "qemu/fifo8.h"
 #include "qemu/main-loop.h"
 #include "qemu/module.h"
 #include "qemu/option.h"
 #include "qemu/timer.h"
 #include "chardev/char.h"
 #include "trace.h"
 #include "exec/memory.h"
 #include "io/channel-file.h"
 #include "qom/object.h"
 #ifdef CONFIG_PNG
 #include <png.h>
 #endif
 
 #define DEFAULT_BACKSCROLL 512
 #define CONSOLE_CURSOR_PERIOD 500
 
 typedef struct TextAttributes {
     uint8_t fgcol:4;
     uint8_t bgcol:4;
     uint8_t bold:1;
     uint8_t uline:1;
     uint8_t blink:1;
     uint8_t invers:1;
     uint8_t unvisible:1;
 } TextAttributes;
 
 typedef struct TextCell {
     uint8_t ch;
     TextAttributes t_attrib;
 } TextCell;
 
 #define MAX_ESC_PARAMS 3
 
 enum TTYState {
     TTY_STATE_NORM,
     TTY_STATE_ESC,
     TTY_STATE_CSI,
 };
 
 typedef enum {
     GRAPHIC_CONSOLE,
     TEXT_CONSOLE,
     TEXT_CONSOLE_FIXED_SIZE
 } console_type_t;
 
 struct QemuConsole {
     Object parent;
 
     int index;
     console_type_t console_type;
     DisplayState *ds;
     DisplaySurface *surface;
     DisplayScanout scanout;
     int dcls;
     DisplayGLCtx *gl;
     int gl_block;
     QEMUTimer *gl_unblock_timer;
     int window_id;
 
     /* Graphic console state.  */
     Object *device;
     uint32_t head;
     QemuUIInfo ui_info;
     QEMUTimer *ui_timer;
     const GraphicHwOps *hw_ops;
     void *hw;
 
     /* Text console state */
     int width;
     int height;
     int total_height;
     int backscroll_height;
     int x, y;
     int x_saved, y_saved;
     int y_displayed;
     int y_base;
     TextAttributes t_attrib_default; /* default text attributes */
     TextAttributes t_attrib; /* currently active text attributes */
     TextCell *cells;
     int text_x[2], text_y[2], cursor_invalidate;
     int echo;
 
     int update_x0;
     int update_y0;
     int update_x1;
     int update_y1;
 
     enum TTYState state;
     int esc_params[MAX_ESC_PARAMS];
     int nb_esc_params;
 
     Chardev *chr;
     /* fifo for key pressed */
     Fifo8 out_fifo;
     CoQueue dump_queue;
 
     QTAILQ_ENTRY(QemuConsole) next;
 };
 
 struct DisplayState {
     QEMUTimer *gui_timer;
     uint64_t last_update;
     uint64_t update_interval;
     bool refreshing;
     bool have_gfx;
     bool have_text;
 
     QLIST_HEAD(, DisplayChangeListener) listeners;
 };
 
 static DisplayState *display_state;
 static QemuConsole *active_console;
 static QTAILQ_HEAD(, QemuConsole) consoles =
     QTAILQ_HEAD_INITIALIZER(consoles);
 static bool cursor_visible_phase;
 static QEMUTimer *cursor_timer;
 
 static void text_console_do_init(Chardev *chr, DisplayState *ds);
 static void dpy_refresh(DisplayState *s);
 static DisplayState *get_alloc_displaystate(void);
 static void text_console_update_cursor_timer(void);
 static void text_console_update_cursor(void *opaque);
 static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl);
 static bool console_compatible_with(QemuConsole *con,
                                     DisplayChangeListener *dcl, Error **errp);
 
 static void gui_update(void *opaque)
 {
     uint64_t interval = GUI_REFRESH_INTERVAL_IDLE;
     uint64_t dcl_interval;
     DisplayState *ds = opaque;
     DisplayChangeListener *dcl;
 
     ds->refreshing = true;
     dpy_refresh(ds);
     ds->refreshing = false;
 
     QLIST_FOREACH(dcl, &ds->listeners, next) {
         dcl_interval = dcl->update_interval ?
             dcl->update_interval : GUI_REFRESH_INTERVAL_DEFAULT;
         if (interval > dcl_interval) {
             interval = dcl_interval;
         }
     }
     if (ds->update_interval != interval) {
         ds->update_interval = interval;
         trace_console_refresh(interval);
     }
     ds->last_update = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
     timer_mod(ds->gui_timer, ds->last_update + interval);
 }
 
 static void gui_setup_refresh(DisplayState *ds)
 {
     DisplayChangeListener *dcl;
     bool need_timer = false;
     bool have_gfx = false;
     bool have_text = false;
 
     QLIST_FOREACH(dcl, &ds->listeners, next) {
         if (dcl->ops->dpy_refresh != NULL) {
             need_timer = true;
         }
         if (dcl->ops->dpy_gfx_update != NULL) {
             have_gfx = true;
         }
         if (dcl->ops->dpy_text_update != NULL) {
             have_text = true;
         }
     }
 
     if (need_timer && ds->gui_timer == NULL) {
         ds->gui_timer = timer_new_ms(QEMU_CLOCK_REALTIME, gui_update, ds);
         timer_mod(ds->gui_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
     }
     if (!need_timer && ds->gui_timer != NULL) {
         timer_free(ds->gui_timer);
         ds->gui_timer = NULL;
     }
 
     ds->have_gfx = have_gfx;
     ds->have_text = have_text;
 }
 
 void graphic_hw_update_done(QemuConsole *con)
 {
     if (con) {
         qemu_co_enter_all(&con->dump_queue, NULL);
     }
 }
 
 void graphic_hw_update(QemuConsole *con)
 {
     bool async = false;
     con = con ? con : active_console;
     if (!con) {
         return;
     }
     if (con->hw_ops->gfx_update) {
         con->hw_ops->gfx_update(con->hw);
         async = con->hw_ops->gfx_update_async;
     }
     if (!async) {
         graphic_hw_update_done(con);
     }
 }
 
 static void graphic_hw_gl_unblock_timer(void *opaque)
 {
     warn_report("console: no gl-unblock within one second");
 }
 
 void graphic_hw_gl_block(QemuConsole *con, bool block)
 {
     uint64_t timeout;
     assert(con != NULL);
 
     if (block) {
         con->gl_block++;
     } else {
         con->gl_block--;
     }
     assert(con->gl_block >= 0);
     if (!con->hw_ops->gl_block) {
         return;
     }
     if ((block && con->gl_block != 1) || (!block && con->gl_block != 0)) {
         return;
     }
     con->hw_ops->gl_block(con->hw, block);
 
     if (block) {
         timeout = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
         timeout += 1000; /* one sec */
         timer_mod(con->gl_unblock_timer, timeout);
     } else {
         timer_del(con->gl_unblock_timer);
     }
 }
 
 int qemu_console_get_window_id(QemuConsole *con)
 {
     return con->window_id;
 }
 
 void qemu_console_set_window_id(QemuConsole *con, int window_id)
 {
     con->window_id = window_id;
 }
 
 void graphic_hw_invalidate(QemuConsole *con)
 {
     if (!con) {
         con = active_console;
     }
     if (con && con->hw_ops->invalidate) {
         con->hw_ops->invalidate(con->hw);
     }
 }
 
 #ifdef CONFIG_PNG
 /**
  * png_save: Take a screenshot as PNG
  *
  * Saves screendump as a PNG file
  *
  * Returns true for success or false for error.
  *
  * @fd: File descriptor for PNG file.
  * @image: Image data in pixman format.
  * @errp: Pointer to an error.
  */
 static bool png_save(int fd, pixman_image_t *image, Error **errp)
 {
     int width = pixman_image_get_width(image);
     int height = pixman_image_get_height(image);
     png_struct *png_ptr;
     png_info *info_ptr;
     g_autoptr(pixman_image_t) linebuf =
                             qemu_pixman_linebuf_create(PIXMAN_a8r8g8b8, width);
     uint8_t *buf = (uint8_t *)pixman_image_get_data(linebuf);
     FILE *f = fdopen(fd, "wb");
     int y;
     if (!f) {
         error_setg_errno(errp, errno,
                          "Failed to create file from file descriptor");
         return false;
     }
 
     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
                                       NULL, NULL);
     if (!png_ptr) {
         error_setg(errp, "PNG creation failed. Unable to write struct");
         fclose(f);
         return false;
     }
 
     info_ptr = png_create_info_struct(png_ptr);
 
     if (!info_ptr) {
         error_setg(errp, "PNG creation failed. Unable to write info");
         fclose(f);
         png_destroy_write_struct(&png_ptr, &info_ptr);
         return false;
     }
 
     png_init_io(png_ptr, f);
 
     png_set_IHDR(png_ptr, info_ptr, width, height, 8,
                  PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
 
     png_write_info(png_ptr, info_ptr);
 
     for (y = 0; y < height; ++y) {
         qemu_pixman_linebuf_fill(linebuf, image, width, 0, y);
         png_write_row(png_ptr, buf);
     }
 
     png_write_end(png_ptr, NULL);
 
     png_destroy_write_struct(&png_ptr, &info_ptr);
 
     if (fclose(f) != 0) {
         error_setg_errno(errp, errno,
                          "PNG creation failed. Unable to close file");
         return false;
     }
 
     return true;
 }
 
 #else /* no png support */
 
 static bool png_save(int fd, pixman_image_t *image, Error **errp)
 {
     error_setg(errp, "Enable PNG support with libpng for screendump");
     return false;
 }
 
 #endif /* CONFIG_PNG */
 
 static bool ppm_save(int fd, pixman_image_t *image, Error **errp)
 {
     int width = pixman_image_get_width(image);
     int height = pixman_image_get_height(image);
     g_autoptr(Object) ioc = OBJECT(qio_channel_file_new_fd(fd));
     g_autofree char *header = NULL;
     g_autoptr(pixman_image_t) linebuf = NULL;
     int y;
 
     trace_ppm_save(fd, image);
 
     header = g_strdup_printf("P6\n%d %d\n%d\n", width, height, 255);
     if (qio_channel_write_all(QIO_CHANNEL(ioc),
                               header, strlen(header), errp) < 0) {
         return false;
     }
 
     linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, width);
     for (y = 0; y < height; y++) {
         qemu_pixman_linebuf_fill(linebuf, image, width, 0, y);
         if (qio_channel_write_all(QIO_CHANNEL(ioc),
                                   (char *)pixman_image_get_data(linebuf),
                                   pixman_image_get_stride(linebuf), errp) < 0) {
             return false;
         }
     }
 
     return true;
 }
 
 static void graphic_hw_update_bh(void *con)
 {
     graphic_hw_update(con);
 }
 
 /* Safety: coroutine-only, concurrent-coroutine safe, main thread only */
 void coroutine_fn
 qmp_screendump(const char *filename, bool has_device, const char *device,
                bool has_head, int64_t head,
                bool has_format, ImageFormat format, Error **errp)
 {
     g_autoptr(pixman_image_t) image = NULL;
     QemuConsole *con;
     DisplaySurface *surface;
     int fd;
 
     if (has_device) {
         con = qemu_console_lookup_by_device_name(device, has_head ? head : 0,
                                                  errp);
         if (!con) {
             return;
         }
     } else {
         if (has_head) {
             error_setg(errp, "'head' must be specified together with 'device'");
             return;
         }
         con = qemu_console_lookup_by_index(0);
         if (!con) {
             error_setg(errp, "There is no console to take a screendump from");
             return;
         }
     }
 
     if (qemu_co_queue_empty(&con->dump_queue)) {
         /* Defer the update, it will restart the pending coroutines */
         aio_bh_schedule_oneshot(qemu_get_aio_context(),
                                 graphic_hw_update_bh, con);
     }
     qemu_co_queue_wait(&con->dump_queue, NULL);
 
     /*
      * All pending coroutines are woken up, while the BQL is held.  No
      * further graphic update are possible until it is released.  Take
      * an image ref before that.
      */
     surface = qemu_console_surface(con);
     if (!surface) {
         error_setg(errp, "no surface");
         return;
     }
     image = pixman_image_ref(surface->image);
 
     fd = qemu_open_old(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
     if (fd == -1) {
         error_setg(errp, "failed to open file '%s': %s", filename,
                    strerror(errno));
         return;
     }
 
     /*
      * The image content could potentially be updated as the coroutine
      * yields and releases the BQL. It could produce corrupted dump, but
      * it should be otherwise safe.
      */
     if (has_format && format == IMAGE_FORMAT_PNG) {
         /* PNG format specified for screendump */
         if (!png_save(fd, image, errp)) {
             qemu_unlink(filename);
         }
     } else {
         /* PPM format specified/default for screendump */
         if (!ppm_save(fd, image, errp)) {
             qemu_unlink(filename);
         }
     }
 }
 
 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata)
 {
     if (!con) {
         con = active_console;
     }
     if (con && con->hw_ops->text_update) {
         con->hw_ops->text_update(con->hw, chardata);
     }
 }
 
 static void vga_fill_rect(QemuConsole *con,
                           int posx, int posy, int width, int height,
                           pixman_color_t color)
 {
     DisplaySurface *surface = qemu_console_surface(con);
     pixman_rectangle16_t rect = {
         .x = posx, .y = posy, .width = width, .height = height
     };
 
     pixman_image_fill_rectangles(PIXMAN_OP_SRC, surface->image,
                                  &color, 1, &rect);
 }
 
 /* copy from (xs, ys) to (xd, yd) a rectangle of size (w, h) */
 static void vga_bitblt(QemuConsole *con,
                        int xs, int ys, int xd, int yd, int w, int h)
 {
     DisplaySurface *surface = qemu_console_surface(con);
 
     pixman_image_composite(PIXMAN_OP_SRC,
                            surface->image, NULL, surface->image,
                            xs, ys, 0, 0, xd, yd, w, h);
 }
 
 /***********************************************************/
 /* basic char display */
 
 #define FONT_HEIGHT 16
 #define FONT_WIDTH 8
 
 #include "vgafont.h"
 
 #define QEMU_RGB(r, g, b)                                               \
     { .red = r << 8, .green = g << 8, .blue = b << 8, .alpha = 0xffff }
 
 static const pixman_color_t color_table_rgb[2][8] = {
     {   /* dark */
         [QEMU_COLOR_BLACK]   = QEMU_RGB(0x00, 0x00, 0x00),  /* black */
         [QEMU_COLOR_BLUE]    = QEMU_RGB(0x00, 0x00, 0xaa),  /* blue */
         [QEMU_COLOR_GREEN]   = QEMU_RGB(0x00, 0xaa, 0x00),  /* green */
         [QEMU_COLOR_CYAN]    = QEMU_RGB(0x00, 0xaa, 0xaa),  /* cyan */
         [QEMU_COLOR_RED]     = QEMU_RGB(0xaa, 0x00, 0x00),  /* red */
         [QEMU_COLOR_MAGENTA] = QEMU_RGB(0xaa, 0x00, 0xaa),  /* magenta */
         [QEMU_COLOR_YELLOW]  = QEMU_RGB(0xaa, 0xaa, 0x00),  /* yellow */
         [QEMU_COLOR_WHITE]   = QEMU_RGB(0xaa, 0xaa, 0xaa),  /* white */
     },
     {   /* bright */
         [QEMU_COLOR_BLACK]   = QEMU_RGB(0x00, 0x00, 0x00),  /* black */
         [QEMU_COLOR_BLUE]    = QEMU_RGB(0x00, 0x00, 0xff),  /* blue */
         [QEMU_COLOR_GREEN]   = QEMU_RGB(0x00, 0xff, 0x00),  /* green */
         [QEMU_COLOR_CYAN]    = QEMU_RGB(0x00, 0xff, 0xff),  /* cyan */
         [QEMU_COLOR_RED]     = QEMU_RGB(0xff, 0x00, 0x00),  /* red */
         [QEMU_COLOR_MAGENTA] = QEMU_RGB(0xff, 0x00, 0xff),  /* magenta */
         [QEMU_COLOR_YELLOW]  = QEMU_RGB(0xff, 0xff, 0x00),  /* yellow */
         [QEMU_COLOR_WHITE]   = QEMU_RGB(0xff, 0xff, 0xff),  /* white */
     }
 };
 
 static void vga_putcharxy(QemuConsole *s, int x, int y, int ch,
                           TextAttributes *t_attrib)
 {
     static pixman_image_t *glyphs[256];
     DisplaySurface *surface = qemu_console_surface(s);
     pixman_color_t fgcol, bgcol;
 
     if (t_attrib->invers) {
         bgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
         fgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
     } else {
         fgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
         bgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
     }
 
     if (!glyphs[ch]) {
         glyphs[ch] = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, ch);
     }
     qemu_pixman_glyph_render(glyphs[ch], surface->image,
                              &fgcol, &bgcol, x, y, FONT_WIDTH, FONT_HEIGHT);
 }
 
 static void text_console_resize(QemuConsole *s)
 {
     TextCell *cells, *c, *c1;
     int w1, x, y, last_width;
 
     assert(s->scanout.kind == SCANOUT_SURFACE);
 
     last_width = s->width;
     s->width = surface_width(s->surface) / FONT_WIDTH;
     s->height = surface_height(s->surface) / FONT_HEIGHT;
 
     w1 = last_width;
     if (s->width < w1)
         w1 = s->width;
 
     cells = g_new(TextCell, s->width * s->total_height + 1);
     for(y = 0; y < s->total_height; y++) {
         c = &cells[y * s->width];
         if (w1 > 0) {
             c1 = &s->cells[y * last_width];
             for(x = 0; x < w1; x++) {
                 *c++ = *c1++;
             }
         }
         for(x = w1; x < s->width; x++) {
             c->ch = ' ';
             c->t_attrib = s->t_attrib_default;
             c++;
         }
     }
     g_free(s->cells);
     s->cells = cells;
 }
 
 static inline void text_update_xy(QemuConsole *s, int x, int y)
 {
     s->text_x[0] = MIN(s->text_x[0], x);
     s->text_x[1] = MAX(s->text_x[1], x);
     s->text_y[0] = MIN(s->text_y[0], y);
     s->text_y[1] = MAX(s->text_y[1], y);
 }
 
 static void invalidate_xy(QemuConsole *s, int x, int y)
 {
     if (!qemu_console_is_visible(s)) {
         return;
     }
     if (s->update_x0 > x * FONT_WIDTH)
         s->update_x0 = x * FONT_WIDTH;
     if (s->update_y0 > y * FONT_HEIGHT)
         s->update_y0 = y * FONT_HEIGHT;
     if (s->update_x1 < (x + 1) * FONT_WIDTH)
         s->update_x1 = (x + 1) * FONT_WIDTH;
     if (s->update_y1 < (y + 1) * FONT_HEIGHT)
         s->update_y1 = (y + 1) * FONT_HEIGHT;
 }
 
 static void update_xy(QemuConsole *s, int x, int y)
 {
     TextCell *c;
     int y1, y2;
 
     if (s->ds->have_text) {
         text_update_xy(s, x, y);
     }
 
     y1 = (s->y_base + y) % s->total_height;
     y2 = y1 - s->y_displayed;
     if (y2 < 0) {
         y2 += s->total_height;
     }
     if (y2 < s->height) {
         if (x >= s->width) {
             x = s->width - 1;
         }
         c = &s->cells[y1 * s->width + x];
         vga_putcharxy(s, x, y2, c->ch,
                       &(c->t_attrib));
         invalidate_xy(s, x, y2);
     }
 }
 
 static void console_show_cursor(QemuConsole *s, int show)
 {
     TextCell *c;
     int y, y1;
     int x = s->x;
 
     if (s->ds->have_text) {
         s->cursor_invalidate = 1;
     }
 
     if (x >= s->width) {
         x = s->width - 1;
     }
     y1 = (s->y_base + s->y) % s->total_height;
     y = y1 - s->y_displayed;
     if (y < 0) {
         y += s->total_height;
     }
     if (y < s->height) {
         c = &s->cells[y1 * s->width + x];
         if (show && cursor_visible_phase) {
             TextAttributes t_attrib = s->t_attrib_default;
             t_attrib.invers = !(t_attrib.invers); /* invert fg and bg */
             vga_putcharxy(s, x, y, c->ch, &t_attrib);
         } else {
             vga_putcharxy(s, x, y, c->ch, &(c->t_attrib));
         }
         invalidate_xy(s, x, y);
     }
 }
 
 static void console_refresh(QemuConsole *s)
 {
     DisplaySurface *surface = qemu_console_surface(s);
     TextCell *c;
     int x, y, y1;
 
     if (s->ds->have_text) {
         s->text_x[0] = 0;
         s->text_y[0] = 0;
         s->text_x[1] = s->width - 1;
         s->text_y[1] = s->height - 1;
         s->cursor_invalidate = 1;
     }
 
     vga_fill_rect(s, 0, 0, surface_width(surface), surface_height(surface),
                   color_table_rgb[0][QEMU_COLOR_BLACK]);
     y1 = s->y_displayed;
     for (y = 0; y < s->height; y++) {
         c = s->cells + y1 * s->width;
         for (x = 0; x < s->width; x++) {
             vga_putcharxy(s, x, y, c->ch,
                           &(c->t_attrib));
             c++;
         }
         if (++y1 == s->total_height) {
             y1 = 0;
         }
     }
     console_show_cursor(s, 1);
     dpy_gfx_update(s, 0, 0,
                    surface_width(surface), surface_height(surface));
 }
 
 static void console_scroll(QemuConsole *s, int ydelta)
 {
     int i, y1;
 
     if (ydelta > 0) {
         for(i = 0; i < ydelta; i++) {
             if (s->y_displayed == s->y_base)
                 break;
             if (++s->y_displayed == s->total_height)
                 s->y_displayed = 0;
         }
     } else {
         ydelta = -ydelta;
         i = s->backscroll_height;
         if (i > s->total_height - s->height)
             i = s->total_height - s->height;
         y1 = s->y_base - i;
         if (y1 < 0)
             y1 += s->total_height;
         for(i = 0; i < ydelta; i++) {
             if (s->y_displayed == y1)
                 break;
             if (--s->y_displayed < 0)
                 s->y_displayed = s->total_height - 1;
         }
     }
     console_refresh(s);
 }
 
 static void console_put_lf(QemuConsole *s)
 {
     TextCell *c;
     int x, y1;
 
     s->y++;
     if (s->y >= s->height) {
         s->y = s->height - 1;
 
         if (s->y_displayed == s->y_base) {
             if (++s->y_displayed == s->total_height)
                 s->y_displayed = 0;
         }
         if (++s->y_base == s->total_height)
             s->y_base = 0;
         if (s->backscroll_height < s->total_height)
             s->backscroll_height++;
         y1 = (s->y_base + s->height - 1) % s->total_height;
         c = &s->cells[y1 * s->width];
         for(x = 0; x < s->width; x++) {
             c->ch = ' ';
             c->t_attrib = s->t_attrib_default;
             c++;
         }
         if (s->y_displayed == s->y_base) {
             if (s->ds->have_text) {
                 s->text_x[0] = 0;
                 s->text_y[0] = 0;
                 s->text_x[1] = s->width - 1;
                 s->text_y[1] = s->height - 1;
             }
 
             vga_bitblt(s, 0, FONT_HEIGHT, 0, 0,
                        s->width * FONT_WIDTH,
                        (s->height - 1) * FONT_HEIGHT);
             vga_fill_rect(s, 0, (s->height - 1) * FONT_HEIGHT,
                           s->width * FONT_WIDTH, FONT_HEIGHT,
                           color_table_rgb[0][s->t_attrib_default.bgcol]);
             s->update_x0 = 0;
             s->update_y0 = 0;
             s->update_x1 = s->width * FONT_WIDTH;
             s->update_y1 = s->height * FONT_HEIGHT;
         }
     }
 }
 
 /* Set console attributes depending on the current escape codes.
  * NOTE: I know this code is not very efficient (checking every color for it
  * self) but it is more readable and better maintainable.
  */
 static void console_handle_escape(QemuConsole *s)
 {
     int i;
 
     for (i=0; i<s->nb_esc_params; i++) {
         switch (s->esc_params[i]) {
             case 0: /* reset all console attributes to default */
                 s->t_attrib = s->t_attrib_default;
                 break;
             case 1:
                 s->t_attrib.bold = 1;
                 break;
             case 4:
                 s->t_attrib.uline = 1;
                 break;
             case 5:
                 s->t_attrib.blink = 1;
                 break;
             case 7:
                 s->t_attrib.invers = 1;
                 break;
             case 8:
                 s->t_attrib.unvisible = 1;
                 break;
             case 22:
                 s->t_attrib.bold = 0;
                 break;
             case 24:
                 s->t_attrib.uline = 0;
                 break;
             case 25:
                 s->t_attrib.blink = 0;
                 break;
             case 27:
                 s->t_attrib.invers = 0;
                 break;
             case 28:
                 s->t_attrib.unvisible = 0;
                 break;
             /* set foreground color */
             case 30:
                 s->t_attrib.fgcol = QEMU_COLOR_BLACK;
                 break;
             case 31:
                 s->t_attrib.fgcol = QEMU_COLOR_RED;
                 break;
             case 32:
                 s->t_attrib.fgcol = QEMU_COLOR_GREEN;
                 break;
             case 33:
                 s->t_attrib.fgcol = QEMU_COLOR_YELLOW;
                 break;
             case 34:
                 s->t_attrib.fgcol = QEMU_COLOR_BLUE;
                 break;
             case 35:
                 s->t_attrib.fgcol = QEMU_COLOR_MAGENTA;
                 break;
             case 36:
                 s->t_attrib.fgcol = QEMU_COLOR_CYAN;
                 break;
             case 37:
                 s->t_attrib.fgcol = QEMU_COLOR_WHITE;
                 break;
             /* set background color */
             case 40:
                 s->t_attrib.bgcol = QEMU_COLOR_BLACK;
                 break;
             case 41:
                 s->t_attrib.bgcol = QEMU_COLOR_RED;
                 break;
             case 42:
                 s->t_attrib.bgcol = QEMU_COLOR_GREEN;
                 break;
             case 43:
                 s->t_attrib.bgcol = QEMU_COLOR_YELLOW;
                 break;
             case 44:
                 s->t_attrib.bgcol = QEMU_COLOR_BLUE;
                 break;
             case 45:
                 s->t_attrib.bgcol = QEMU_COLOR_MAGENTA;
                 break;
             case 46:
                 s->t_attrib.bgcol = QEMU_COLOR_CYAN;
                 break;
             case 47:
                 s->t_attrib.bgcol = QEMU_COLOR_WHITE;
                 break;
         }
     }
 }
 
 static void console_clear_xy(QemuConsole *s, int x, int y)
 {
     int y1 = (s->y_base + y) % s->total_height;
     if (x >= s->width) {
         x = s->width - 1;
     }
     TextCell *c = &s->cells[y1 * s->width + x];
     c->ch = ' ';
     c->t_attrib = s->t_attrib_default;
     update_xy(s, x, y);
 }
 
 static void console_put_one(QemuConsole *s, int ch)
 {
     TextCell *c;
     int y1;
     if (s->x >= s->width) {
         /* line wrap */
         s->x = 0;
         console_put_lf(s);
     }
     y1 = (s->y_base + s->y) % s->total_height;
     c = &s->cells[y1 * s->width + s->x];
     c->ch = ch;
     c->t_attrib = s->t_attrib;
     update_xy(s, s->x, s->y);
     s->x++;
 }
 
 static void console_respond_str(QemuConsole *s, const char *buf)
 {
     while (*buf) {
         console_put_one(s, *buf);
         buf++;
     }
 }
 
 /* set cursor, checking bounds */
 static void set_cursor(QemuConsole *s, int x, int y)
 {
     if (x < 0) {
         x = 0;
     }
     if (y < 0) {
         y = 0;
     }
     if (y >= s->height) {
         y = s->height - 1;
     }
     if (x >= s->width) {
         x = s->width - 1;
     }
 
     s->x = x;
     s->y = y;
 }
 
 static void console_putchar(QemuConsole *s, int ch)
 {
     int i;
     int x, y;
     char response[40];
 
     switch(s->state) {
     case TTY_STATE_NORM:
         switch(ch) {
         case '\r':  /* carriage return */
             s->x = 0;
             break;
         case '\n':  /* newline */
             console_put_lf(s);
             break;
         case '\b':  /* backspace */
             if (s->x > 0)
                 s->x--;
             break;
         case '\t':  /* tabspace */
             if (s->x + (8 - (s->x % 8)) > s->width) {
                 s->x = 0;
                 console_put_lf(s);
             } else {
                 s->x = s->x + (8 - (s->x % 8));
             }
             break;
         case '\a':  /* alert aka. bell */
             /* TODO: has to be implemented */
             break;
         case 14:
             /* SI (shift in), character set 0 (ignored) */
             break;
         case 15:
             /* SO (shift out), character set 1 (ignored) */
             break;
         case 27:    /* esc (introducing an escape sequence) */
             s->state = TTY_STATE_ESC;
             break;
         default:
             console_put_one(s, ch);
             break;
         }
         break;
     case TTY_STATE_ESC: /* check if it is a terminal escape sequence */
         if (ch == '[') {
             for(i=0;i<MAX_ESC_PARAMS;i++)
                 s->esc_params[i] = 0;
             s->nb_esc_params = 0;
             s->state = TTY_STATE_CSI;
         } else {
             s->state = TTY_STATE_NORM;
         }
         break;
     case TTY_STATE_CSI: /* handle escape sequence parameters */
         if (ch >= '0' && ch <= '9') {
             if (s->nb_esc_params < MAX_ESC_PARAMS) {
                 int *param = &s->esc_params[s->nb_esc_params];
                 int digit = (ch - '0');
 
                 *param = (*param <= (INT_MAX - digit) / 10) ?
                          *param * 10 + digit : INT_MAX;
             }
         } else {
             if (s->nb_esc_params < MAX_ESC_PARAMS)
                 s->nb_esc_params++;
             if (ch == ';' || ch == '?') {
                 break;
             }
             trace_console_putchar_csi(s->esc_params[0], s->esc_params[1],
                                       ch, s->nb_esc_params);
             s->state = TTY_STATE_NORM;
             switch(ch) {
             case 'A':
                 /* move cursor up */
                 if (s->esc_params[0] == 0) {
                     s->esc_params[0] = 1;
                 }
                 set_cursor(s, s->x, s->y - s->esc_params[0]);
                 break;
             case 'B':
                 /* move cursor down */
                 if (s->esc_params[0] == 0) {
                     s->esc_params[0] = 1;
                 }
                 set_cursor(s, s->x, s->y + s->esc_params[0]);
                 break;
             case 'C':
                 /* move cursor right */
                 if (s->esc_params[0] == 0) {
                     s->esc_params[0] = 1;
                 }
                 set_cursor(s, s->x + s->esc_params[0], s->y);
                 break;
             case 'D':
                 /* move cursor left */
                 if (s->esc_params[0] == 0) {
                     s->esc_params[0] = 1;
                 }
                 set_cursor(s, s->x - s->esc_params[0], s->y);
                 break;
             case 'G':
                 /* move cursor to column */
                 set_cursor(s, s->esc_params[0] - 1, s->y);
                 break;
             case 'f':
             case 'H':
                 /* move cursor to row, column */
                 set_cursor(s, s->esc_params[1] - 1, s->esc_params[0] - 1);
                 break;
             case 'J':
                 switch (s->esc_params[0]) {
                 case 0:
                     /* clear to end of screen */
                     for (y = s->y; y < s->height; y++) {
                         for (x = 0; x < s->width; x++) {
                             if (y == s->y && x < s->x) {
                                 continue;
                             }
                             console_clear_xy(s, x, y);
                         }
                     }
                     break;
                 case 1:
                     /* clear from beginning of screen */
                     for (y = 0; y <= s->y; y++) {
                         for (x = 0; x < s->width; x++) {
                             if (y == s->y && x > s->x) {
                                 break;
                             }
                             console_clear_xy(s, x, y);
                         }
                     }
                     break;
                 case 2:
                     /* clear entire screen */
                     for (y = 0; y <= s->height; y++) {
                         for (x = 0; x < s->width; x++) {
                             console_clear_xy(s, x, y);
                         }
                     }
                     break;
                 }
                 break;
             case 'K':
                 switch (s->esc_params[0]) {
                 case 0:
                     /* clear to eol */
                     for(x = s->x; x < s->width; x++) {
                         console_clear_xy(s, x, s->y);
                     }
                     break;
                 case 1:
                     /* clear from beginning of line */
                     for (x = 0; x <= s->x && x < s->width; x++) {
                         console_clear_xy(s, x, s->y);
                     }
                     break;
                 case 2:
                     /* clear entire line */
                     for(x = 0; x < s->width; x++) {
                         console_clear_xy(s, x, s->y);
                     }
                     break;
                 }
                 break;
             case 'm':
                 console_handle_escape(s);
                 break;
             case 'n':
                 switch (s->esc_params[0]) {
                 case 5:
                     /* report console status (always succeed)*/
                     console_respond_str(s, "\033[0n");
                     break;
                 case 6:
                     /* report cursor position */
                     sprintf(response, "\033[%d;%dR",
                            (s->y_base + s->y) % s->total_height + 1,
                             s->x + 1);
                     console_respond_str(s, response);
                     break;
                 }
                 break;
             case 's':
                 /* save cursor position */
                 s->x_saved = s->x;
                 s->y_saved = s->y;
                 break;
             case 'u':
                 /* restore cursor position */
                 s->x = s->x_saved;
                 s->y = s->y_saved;
                 break;
             default:
                 trace_console_putchar_unhandled(ch);
                 break;
             }
             break;
         }
     }
 }
 
 static void displaychangelistener_gfx_switch(DisplayChangeListener *dcl,
                                              struct DisplaySurface *new_surface,
                                              bool update)
 {
     if (dcl->ops->dpy_gfx_switch) {
         dcl->ops->dpy_gfx_switch(dcl, new_surface);
     }
 
     if (update && dcl->ops->dpy_gfx_update) {
         dcl->ops->dpy_gfx_update(dcl, 0, 0,
                                  surface_width(new_surface),
                                  surface_height(new_surface));
     }
 }
 
 static void dpy_gfx_create_texture(QemuConsole *con, DisplaySurface *surface)
 {
     if (con->gl && con->gl->ops->dpy_gl_ctx_create_texture) {
         con->gl->ops->dpy_gl_ctx_create_texture(con->gl, surface);
     }
 }
 
 static void dpy_gfx_destroy_texture(QemuConsole *con, DisplaySurface *surface)
 {
     if (con->gl && con->gl->ops->dpy_gl_ctx_destroy_texture) {
         con->gl->ops->dpy_gl_ctx_destroy_texture(con->gl, surface);
     }
 }
 
 static void dpy_gfx_update_texture(QemuConsole *con, DisplaySurface *surface,
                                    int x, int y, int w, int h)
 {
     if (con->gl && con->gl->ops->dpy_gl_ctx_update_texture) {
         con->gl->ops->dpy_gl_ctx_update_texture(con->gl, surface, x, y, w, h);
     }
 }
 
 static void displaychangelistener_display_console(DisplayChangeListener *dcl,
                                                   QemuConsole *con,
                                                   Error **errp)
 {
     static const char nodev[] =
         "This VM has no graphic display device.";
     static DisplaySurface *dummy;
 
     if (!con || !console_compatible_with(con, dcl, errp)) {
         if (!dummy) {
             dummy = qemu_create_placeholder_surface(640, 480, nodev);
         }
         if (con) {
             dpy_gfx_create_texture(con, dummy);
         }
         displaychangelistener_gfx_switch(dcl, dummy, TRUE);
         return;
     }
 
     dpy_gfx_create_texture(con, con->surface);
     displaychangelistener_gfx_switch(dcl, con->surface,
                                      con->scanout.kind == SCANOUT_SURFACE);
 
     if (con->scanout.kind == SCANOUT_DMABUF &&
         displaychangelistener_has_dmabuf(dcl)) {
         dcl->ops->dpy_gl_scanout_dmabuf(dcl, con->scanout.dmabuf);
     } else if (con->scanout.kind == SCANOUT_TEXTURE &&
                dcl->ops->dpy_gl_scanout_texture) {
         dcl->ops->dpy_gl_scanout_texture(dcl,
                                          con->scanout.texture.backing_id,
                                          con->scanout.texture.backing_y_0_top,
                                          con->scanout.texture.backing_width,
                                          con->scanout.texture.backing_height,
                                          con->scanout.texture.x,
                                          con->scanout.texture.y,
                                          con->scanout.texture.width,
                                          con->scanout.texture.height);
     }
 }
 
 void console_select(unsigned int index)
 {
     DisplayChangeListener *dcl;
     QemuConsole *s;
 
     trace_console_select(index);
     s = qemu_console_lookup_by_index(index);
     if (s) {
         DisplayState *ds = s->ds;
 
         active_console = s;
         if (ds->have_gfx) {
             QLIST_FOREACH(dcl, &ds->listeners, next) {
                 if (dcl->con != NULL) {
                     continue;
                 }
                 displaychangelistener_display_console(dcl, s, NULL);
             }
         }
         if (ds->have_text) {
             dpy_text_resize(s, s->width, s->height);
         }
         text_console_update_cursor(NULL);
     }
 }
 
 struct VCChardev {
     Chardev parent;
     QemuConsole *console;
 };
 typedef struct VCChardev VCChardev;
 
 #define TYPE_CHARDEV_VC "chardev-vc"
 DECLARE_INSTANCE_CHECKER(VCChardev, VC_CHARDEV,
                          TYPE_CHARDEV_VC)
 
 static int vc_chr_write(Chardev *chr, const uint8_t *buf, int len)
 {
     VCChardev *drv = VC_CHARDEV(chr);
     QemuConsole *s = drv->console;
     int i;
 
     if (!s->ds) {
         return 0;
     }
 
     s->update_x0 = s->width * FONT_WIDTH;
     s->update_y0 = s->height * FONT_HEIGHT;
     s->update_x1 = 0;
     s->update_y1 = 0;
     console_show_cursor(s, 0);
     for(i = 0; i < len; i++) {
         console_putchar(s, buf[i]);
     }
     console_show_cursor(s, 1);
     if (s->ds->have_gfx && s->update_x0 < s->update_x1) {
         dpy_gfx_update(s, s->update_x0, s->update_y0,
                        s->update_x1 - s->update_x0,
                        s->update_y1 - s->update_y0);
     }
     return len;
 }
 
 static void kbd_send_chars(QemuConsole *s)
 {
     uint32_t len, avail;
 
     len = qemu_chr_be_can_write(s->chr);
     avail = fifo8_num_used(&s->out_fifo);
     while (len > 0 && avail > 0) {
         const uint8_t *buf;
         uint32_t size;
 
         buf = fifo8_pop_buf(&s->out_fifo, MIN(len, avail), &size);
         qemu_chr_be_write(s->chr, buf, size);
         len = qemu_chr_be_can_write(s->chr);
         avail -= size;
     }
 }
 
 /* called when an ascii key is pressed */
 void kbd_put_keysym_console(QemuConsole *s, int keysym)
 {
     uint8_t buf[16], *q;
     int c;
     uint32_t num_free;
 
     if (!s || (s->console_type == GRAPHIC_CONSOLE))
         return;
 
     switch(keysym) {
     case QEMU_KEY_CTRL_UP:
         console_scroll(s, -1);
         break;
     case QEMU_KEY_CTRL_DOWN:
         console_scroll(s, 1);
         break;
     case QEMU_KEY_CTRL_PAGEUP:
         console_scroll(s, -10);
         break;
     case QEMU_KEY_CTRL_PAGEDOWN:
         console_scroll(s, 10);
         break;
     default:
         /* convert the QEMU keysym to VT100 key string */
         q = buf;
         if (keysym >= 0xe100 && keysym <= 0xe11f) {
             *q++ = '\033';
             *q++ = '[';
             c = keysym - 0xe100;
             if (c >= 10)
                 *q++ = '0' + (c / 10);
             *q++ = '0' + (c % 10);
             *q++ = '~';
         } else if (keysym >= 0xe120 && keysym <= 0xe17f) {
             *q++ = '\033';
             *q++ = '[';
             *q++ = keysym & 0xff;
         } else if (s->echo && (keysym == '\r' || keysym == '\n')) {
             vc_chr_write(s->chr, (const uint8_t *) "\r", 1);
             *q++ = '\n';
         } else {
             *q++ = keysym;
         }
         if (s->echo) {
             vc_chr_write(s->chr, buf, q - buf);
         }
         num_free = fifo8_num_free(&s->out_fifo);
         fifo8_push_all(&s->out_fifo, buf, MIN(num_free, q - buf));
         kbd_send_chars(s);
         break;
     }
 }
 
 static const int qcode_to_keysym[Q_KEY_CODE__MAX] = {
     [Q_KEY_CODE_UP]     = QEMU_KEY_UP,
     [Q_KEY_CODE_DOWN]   = QEMU_KEY_DOWN,
     [Q_KEY_CODE_RIGHT]  = QEMU_KEY_RIGHT,
     [Q_KEY_CODE_LEFT]   = QEMU_KEY_LEFT,
     [Q_KEY_CODE_HOME]   = QEMU_KEY_HOME,
     [Q_KEY_CODE_END]    = QEMU_KEY_END,
     [Q_KEY_CODE_PGUP]   = QEMU_KEY_PAGEUP,
     [Q_KEY_CODE_PGDN]   = QEMU_KEY_PAGEDOWN,
     [Q_KEY_CODE_DELETE] = QEMU_KEY_DELETE,
     [Q_KEY_CODE_TAB]    = QEMU_KEY_TAB,
     [Q_KEY_CODE_BACKSPACE] = QEMU_KEY_BACKSPACE,
 };
 
 static const int ctrl_qcode_to_keysym[Q_KEY_CODE__MAX] = {
     [Q_KEY_CODE_UP]     = QEMU_KEY_CTRL_UP,
     [Q_KEY_CODE_DOWN]   = QEMU_KEY_CTRL_DOWN,
     [Q_KEY_CODE_RIGHT]  = QEMU_KEY_CTRL_RIGHT,
     [Q_KEY_CODE_LEFT]   = QEMU_KEY_CTRL_LEFT,
     [Q_KEY_CODE_HOME]   = QEMU_KEY_CTRL_HOME,
     [Q_KEY_CODE_END]    = QEMU_KEY_CTRL_END,
     [Q_KEY_CODE_PGUP]   = QEMU_KEY_CTRL_PAGEUP,
     [Q_KEY_CODE_PGDN]   = QEMU_KEY_CTRL_PAGEDOWN,
 };
 
 bool kbd_put_qcode_console(QemuConsole *s, int qcode, bool ctrl)
 {
     int keysym;
 
     keysym = ctrl ? ctrl_qcode_to_keysym[qcode] : qcode_to_keysym[qcode];
     if (keysym == 0) {
         return false;
     }
     kbd_put_keysym_console(s, keysym);
     return true;
 }
 
 void kbd_put_string_console(QemuConsole *s, const char *str, int len)
 {
     int i;
 
     for (i = 0; i < len && str[i]; i++) {
         kbd_put_keysym_console(s, str[i]);
     }
 }
 
 void kbd_put_keysym(int keysym)
 {
     kbd_put_keysym_console(active_console, keysym);
 }
 
 static void text_console_invalidate(void *opaque)
 {
     QemuConsole *s = (QemuConsole *) opaque;
 
     if (s->ds->have_text && s->console_type == TEXT_CONSOLE) {
         text_console_resize(s);
     }
     console_refresh(s);
 }
 
 static void text_console_update(void *opaque, console_ch_t *chardata)
 {
     QemuConsole *s = (QemuConsole *) opaque;
     int i, j, src;
 
     if (s->text_x[0] <= s->text_x[1]) {
         src = (s->y_base + s->text_y[0]) * s->width;
         chardata += s->text_y[0] * s->width;
         for (i = s->text_y[0]; i <= s->text_y[1]; i ++)
             for (j = 0; j < s->width; j++, src++) {
                 console_write_ch(chardata ++,
                                  ATTR2CHTYPE(s->cells[src].ch,
                                              s->cells[src].t_attrib.fgcol,
                                              s->cells[src].t_attrib.bgcol,
                                              s->cells[src].t_attrib.bold));
             }
         dpy_text_update(s, s->text_x[0], s->text_y[0],
                         s->text_x[1] - s->text_x[0], i - s->text_y[0]);
         s->text_x[0] = s->width;
         s->text_y[0] = s->height;
         s->text_x[1] = 0;
         s->text_y[1] = 0;
     }
     if (s->cursor_invalidate) {
         dpy_text_cursor(s, s->x, s->y);
         s->cursor_invalidate = 0;
     }
 }
 
 static QemuConsole *new_console(DisplayState *ds, console_type_t console_type,
                                 uint32_t head)
 {
     Object *obj;
     QemuConsole *s;
     int i;
 
     obj = object_new(TYPE_QEMU_CONSOLE);
     s = QEMU_CONSOLE(obj);
     qemu_co_queue_init(&s->dump_queue);
     s->head = head;
     object_property_add_link(obj, "device", TYPE_DEVICE,
                              (Object **)&s->device,
                              object_property_allow_set_link,
                              OBJ_PROP_LINK_STRONG);
     object_property_add_uint32_ptr(obj, "head", &s->head,
                                    OBJ_PROP_FLAG_READ);
 
     if (!active_console || ((active_console->console_type != GRAPHIC_CONSOLE) &&
         (console_type == GRAPHIC_CONSOLE))) {
         active_console = s;
     }
     s->ds = ds;
     s->console_type = console_type;
     s->window_id = -1;
 
     if (QTAILQ_EMPTY(&consoles)) {
         s->index = 0;
         QTAILQ_INSERT_TAIL(&consoles, s, next);
     } else if (console_type != GRAPHIC_CONSOLE || phase_check(PHASE_MACHINE_READY)) {
         QemuConsole *last = QTAILQ_LAST(&consoles);
         s->index = last->index + 1;
         QTAILQ_INSERT_TAIL(&consoles, s, next);
     } else {
         /*
          * HACK: Put graphical consoles before text consoles.
          *
          * Only do that for coldplugged devices.  After initial device
          * initialization we will not renumber the consoles any more.
          */
         QemuConsole *c = QTAILQ_FIRST(&consoles);
 
         while (QTAILQ_NEXT(c, next) != NULL &&
                c->console_type == GRAPHIC_CONSOLE) {
             c = QTAILQ_NEXT(c, next);
         }
         if (c->console_type == GRAPHIC_CONSOLE) {
             /* have no text consoles */
             s->index = c->index + 1;
             QTAILQ_INSERT_AFTER(&consoles, c, s, next);
         } else {
             s->index = c->index;
             QTAILQ_INSERT_BEFORE(c, s, next);
             /* renumber text consoles */
             for (i = s->index + 1; c != NULL; c = QTAILQ_NEXT(c, next), i++) {
                 c->index = i;
             }
         }
     }
     return s;
 }
 
 DisplaySurface *qemu_create_displaysurface(int width, int height)
 {
     DisplaySurface *surface = g_new0(DisplaySurface, 1);
 
     trace_displaysurface_create(surface, width, height);
     surface->format = PIXMAN_x8r8g8b8;
     surface->image = pixman_image_create_bits(surface->format,
                                               width, height,
                                               NULL, width * 4);
     assert(surface->image != NULL);
     surface->flags = QEMU_ALLOCATED_FLAG;
 
     return surface;
 }
 
 DisplaySurface *qemu_create_displaysurface_from(int width, int height,
                                                 pixman_format_code_t format,
                                                 int linesize, uint8_t *data)
 {
     DisplaySurface *surface = g_new0(DisplaySurface, 1);
 
     trace_displaysurface_create_from(surface, width, height, format);
     surface->format = format;
     surface->image = pixman_image_create_bits(surface->format,
                                               width, height,
                                               (void *)data, linesize);
     assert(surface->image != NULL);
 
     return surface;
 }
 
 DisplaySurface *qemu_create_displaysurface_pixman(pixman_image_t *image)
 {
     DisplaySurface *surface = g_new0(DisplaySurface, 1);
 
     trace_displaysurface_create_pixman(surface);
     surface->format = pixman_image_get_format(image);
     surface->image = pixman_image_ref(image);
 
     return surface;
 }
 
 DisplaySurface *qemu_create_placeholder_surface(int w, int h,
                                                 const char *msg)
 {
     DisplaySurface *surface = qemu_create_displaysurface(w, h);
     pixman_color_t bg = color_table_rgb[0][QEMU_COLOR_BLACK];
     pixman_color_t fg = color_table_rgb[0][QEMU_COLOR_WHITE];
     pixman_image_t *glyph;
     int len, x, y, i;
 
     len = strlen(msg);
     x = (w / FONT_WIDTH  - len) / 2;
     y = (h / FONT_HEIGHT - 1)   / 2;
     for (i = 0; i < len; i++) {
         glyph = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, msg[i]);
         qemu_pixman_glyph_render(glyph, surface->image, &fg, &bg,
                                  x+i, y, FONT_WIDTH, FONT_HEIGHT);
         qemu_pixman_image_unref(glyph);
     }
     surface->flags |= QEMU_PLACEHOLDER_FLAG;
     return surface;
 }
 
 void qemu_free_displaysurface(DisplaySurface *surface)
 {
     if (surface == NULL) {
         return;
     }
     trace_displaysurface_free(surface);
     qemu_pixman_image_unref(surface->image);
     g_free(surface);
 }
 
 bool console_has_gl(QemuConsole *con)
 {
     return con->gl != NULL;
 }
 
 static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl)
 {
     if (dcl->ops->dpy_has_dmabuf) {
         return dcl->ops->dpy_has_dmabuf(dcl);
     }
 
     if (dcl->ops->dpy_gl_scanout_dmabuf) {
         return true;
     }
 
     return false;
 }
 
 static bool console_compatible_with(QemuConsole *con,
                                     DisplayChangeListener *dcl, Error **errp)
 {
     int flags;
 
     flags = con->hw_ops->get_flags ? con->hw_ops->get_flags(con->hw) : 0;
 
     if (console_has_gl(con) &&
         !con->gl->ops->dpy_gl_ctx_is_compatible_dcl(con->gl, dcl)) {
         error_setg(errp, "Display %s is incompatible with the GL context",
                    dcl->ops->dpy_name);
         return false;
     }
 
     if (flags & GRAPHIC_FLAGS_GL &&
         !console_has_gl(con)) {
         error_setg(errp, "The console requires a GL context.");
         return false;
 
     }
 
     if (flags & GRAPHIC_FLAGS_DMABUF &&
         !displaychangelistener_has_dmabuf(dcl)) {
         error_setg(errp, "The console requires display DMABUF support.");
         return false;
     }
 
     return true;
 }
 
 void qemu_console_set_display_gl_ctx(QemuConsole *con, DisplayGLCtx *gl)
 {
     /* display has opengl support */
     assert(con);
     if (con->gl) {
         error_report("The console already has an OpenGL context.");
         exit(1);
     }
     con->gl = gl;
 }
 
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
     QemuConsole *con;
 
     assert(!dcl->ds);
 
     trace_displaychangelistener_register(dcl, dcl->ops->dpy_name);
     dcl->ds = get_alloc_displaystate();
     QLIST_INSERT_HEAD(&dcl->ds->listeners, dcl, next);
     gui_setup_refresh(dcl->ds);
     if (dcl->con) {
         dcl->con->dcls++;
         con = dcl->con;
     } else {
         con = active_console;
     }
     displaychangelistener_display_console(dcl, con, dcl->con ? &error_fatal : NULL);
     text_console_update_cursor(NULL);
 }
 
 void update_displaychangelistener(DisplayChangeListener *dcl,
                                   uint64_t interval)
 {
     DisplayState *ds = dcl->ds;
 
     dcl->update_interval = interval;
     if (!ds->refreshing && ds->update_interval > interval) {
         timer_mod(ds->gui_timer, ds->last_update + interval);
     }
 }
 
 void unregister_displaychangelistener(DisplayChangeListener *dcl)
 {
     DisplayState *ds = dcl->ds;
     trace_displaychangelistener_unregister(dcl, dcl->ops->dpy_name);
     if (dcl->con) {
         dcl->con->dcls--;
     }
     QLIST_REMOVE(dcl, next);
     dcl->ds = NULL;
     gui_setup_refresh(ds);
 }
 
 static void dpy_set_ui_info_timer(void *opaque)
 {
     QemuConsole *con = opaque;
 
     con->hw_ops->ui_info(con->hw, con->head, &con->ui_info);
 }
 
 bool dpy_ui_info_supported(QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
 
     return con->hw_ops->ui_info != NULL;
 }
 
 const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
 
     return &con->ui_info;
 }
 
 int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info, bool delay)
 {
     if (con == NULL) {
         con = active_console;
     }
 
     if (!dpy_ui_info_supported(con)) {
         return -1;
     }
     if (memcmp(&con->ui_info, info, sizeof(con->ui_info)) == 0) {
         /* nothing changed -- ignore */
         return 0;
     }
 
     /*
      * Typically we get a flood of these as the user resizes the window.
      * Wait until the dust has settled (one second without updates), then
      * go notify the guest.
      */
     con->ui_info = *info;
     timer_mod(con->ui_timer,
               qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + (delay ? 1000 : 0));
     return 0;
 }
 
 void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
     int width = qemu_console_get_width(con, x + w);
     int height = qemu_console_get_height(con, y + h);
 
     x = MAX(x, 0);
     y = MAX(y, 0);
     x = MIN(x, width);
     y = MIN(y, height);
     w = MIN(w, width - x);
     h = MIN(h, height - y);
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     dpy_gfx_update_texture(con, con->surface, x, y, w, h);
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gfx_update) {
             dcl->ops->dpy_gfx_update(dcl, x, y, w, h);
         }
     }
 }
 
 void dpy_gfx_update_full(QemuConsole *con)
 {
     int w = qemu_console_get_width(con, 0);
     int h = qemu_console_get_height(con, 0);
 
     dpy_gfx_update(con, 0, 0, w, h);
 }
 
 void dpy_gfx_replace_surface(QemuConsole *con,
                              DisplaySurface *surface)
 {
     static const char placeholder_msg[] = "Display output is not active.";
     DisplayState *s = con->ds;
     DisplaySurface *old_surface = con->surface;
     DisplayChangeListener *dcl;
     int width;
     int height;
 
     if (!surface) {
         if (old_surface) {
             width = surface_width(old_surface);
             height = surface_height(old_surface);
         } else {
             width = 640;
             height = 480;
         }
 
         surface = qemu_create_placeholder_surface(width, height, placeholder_msg);
     }
 
     assert(old_surface != surface);
 
     con->scanout.kind = SCANOUT_SURFACE;
     con->surface = surface;
     dpy_gfx_create_texture(con, surface);
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         displaychangelistener_gfx_switch(dcl, surface, FALSE);
     }
     dpy_gfx_destroy_texture(con, old_surface);
     qemu_free_displaysurface(old_surface);
 }
 
 bool dpy_gfx_check_format(QemuConsole *con,
                           pixman_format_code_t format)
 {
     DisplayChangeListener *dcl;
     DisplayState *s = con->ds;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->con && dcl->con != con) {
             /* dcl bound to another console -> skip */
             continue;
         }
         if (dcl->ops->dpy_gfx_check_format) {
             if (!dcl->ops->dpy_gfx_check_format(dcl, format)) {
                 return false;
             }
         } else {
             /* default is to allow native 32 bpp only */
             if (format != qemu_default_pixman_format(32, true)) {
                 return false;
             }
         }
     }
     return true;
 }
 
 static void dpy_refresh(DisplayState *s)
 {
     DisplayChangeListener *dcl;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->ops->dpy_refresh) {
             dcl->ops->dpy_refresh(dcl);
         }
     }
 }
 
 void dpy_text_cursor(QemuConsole *con, int x, int y)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_text_cursor) {
             dcl->ops->dpy_text_cursor(dcl, x, y);
         }
     }
 }
 
 void dpy_text_update(QemuConsole *con, int x, int y, int w, int h)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_text_update) {
             dcl->ops->dpy_text_update(dcl, x, y, w, h);
         }
     }
 }
 
 void dpy_text_resize(QemuConsole *con, int w, int h)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_text_resize) {
             dcl->ops->dpy_text_resize(dcl, w, h);
         }
     }
 }
 
 void dpy_mouse_set(QemuConsole *con, int x, int y, int on)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_mouse_set) {
             dcl->ops->dpy_mouse_set(dcl, x, y, on);
         }
     }
 }
 
 void dpy_cursor_define(QemuConsole *con, QEMUCursor *cursor)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_cursor_define) {
             dcl->ops->dpy_cursor_define(dcl, cursor);
         }
     }
 }
 
 bool dpy_cursor_define_supported(QemuConsole *con)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->ops->dpy_cursor_define) {
             return true;
         }
     }
     return false;
 }
 
 QEMUGLContext dpy_gl_ctx_create(QemuConsole *con,
                                 struct QEMUGLParams *qparams)
 {
     assert(con->gl);
     return con->gl->ops->dpy_gl_ctx_create(con->gl, qparams);
 }
 
 void dpy_gl_ctx_destroy(QemuConsole *con, QEMUGLContext ctx)
 {
     assert(con->gl);
     con->gl->ops->dpy_gl_ctx_destroy(con->gl, ctx);
 }
 
 int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx)
 {
     assert(con->gl);
     return con->gl->ops->dpy_gl_ctx_make_current(con->gl, ctx);
 }
 
 void dpy_gl_scanout_disable(QemuConsole *con)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     if (con->scanout.kind != SCANOUT_SURFACE) {
         con->scanout.kind = SCANOUT_NONE;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_scanout_disable) {
             dcl->ops->dpy_gl_scanout_disable(dcl);
         }
     }
 }
 
 void dpy_gl_scanout_texture(QemuConsole *con,
                             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 width, uint32_t height)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     con->scanout.kind = SCANOUT_TEXTURE;
     con->scanout.texture = (ScanoutTexture) {
         backing_id, backing_y_0_top, backing_width, backing_height,
         x, y, width, height
     };
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_scanout_texture) {
             dcl->ops->dpy_gl_scanout_texture(dcl, backing_id,
                                              backing_y_0_top,
                                              backing_width, backing_height,
                                              x, y, width, height);
         }
     }
 }
 
 void dpy_gl_scanout_dmabuf(QemuConsole *con,
                            QemuDmaBuf *dmabuf)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     con->scanout.kind = SCANOUT_DMABUF;
     con->scanout.dmabuf = dmabuf;
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_scanout_dmabuf) {
             dcl->ops->dpy_gl_scanout_dmabuf(dcl, dmabuf);
         }
     }
 }
 
 void dpy_gl_cursor_dmabuf(QemuConsole *con, QemuDmaBuf *dmabuf,
                           bool have_hot, uint32_t hot_x, uint32_t hot_y)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_cursor_dmabuf) {
             dcl->ops->dpy_gl_cursor_dmabuf(dcl, dmabuf,
                                            have_hot, hot_x, hot_y);
         }
     }
 }
 
 void dpy_gl_cursor_position(QemuConsole *con,
                             uint32_t pos_x, uint32_t pos_y)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_cursor_position) {
             dcl->ops->dpy_gl_cursor_position(dcl, pos_x, pos_y);
         }
     }
 }
 
 void dpy_gl_release_dmabuf(QemuConsole *con,
                           QemuDmaBuf *dmabuf)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_release_dmabuf) {
             dcl->ops->dpy_gl_release_dmabuf(dcl, dmabuf);
         }
     }
 }
 
 void dpy_gl_update(QemuConsole *con,
                    uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
 
     assert(con->gl);
 
     graphic_hw_gl_block(con, true);
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
             continue;
         }
         if (dcl->ops->dpy_gl_update) {
             dcl->ops->dpy_gl_update(dcl, x, y, w, h);
         }
     }
     graphic_hw_gl_block(con, false);
 }
 
 /***********************************************************/
 /* register display */
 
 /* console.c internal use only */
 static DisplayState *get_alloc_displaystate(void)
 {
     if (!display_state) {
         display_state = g_new0(DisplayState, 1);
         cursor_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
                                     text_console_update_cursor, NULL);
     }
     return display_state;
 }
 
 /*
  * Called by main(), after creating QemuConsoles
  * and before initializing ui (sdl/vnc/...).
  */
 DisplayState *init_displaystate(void)
 {
     gchar *name;
     QemuConsole *con;
 
     get_alloc_displaystate();
     QTAILQ_FOREACH(con, &consoles, next) {
         if (con->console_type != GRAPHIC_CONSOLE &&
             con->ds == NULL) {
             text_console_do_init(con->chr, display_state);
         }
 
         /* Hook up into the qom tree here (not in new_console()), once
          * all QemuConsoles are created and the order / numbering
          * doesn't change any more */
         name = g_strdup_printf("console[%d]", con->index);
         object_property_add_child(container_get(object_get_root(), "/backend"),
                                   name, OBJECT(con));
         g_free(name);
     }
 
     return display_state;
 }
 
 void graphic_console_set_hwops(QemuConsole *con,
                                const GraphicHwOps *hw_ops,
                                void *opaque)
 {
     con->hw_ops = hw_ops;
     con->hw = opaque;
 }
 
 QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
                                   const GraphicHwOps *hw_ops,
                                   void *opaque)
 {
     static const char noinit[] =
         "Guest has not initialized the display (yet).";
     int width = 640;
     int height = 480;
     QemuConsole *s;
     DisplayState *ds;
     DisplaySurface *surface;
 
     ds = get_alloc_displaystate();
     s = qemu_console_lookup_unused();
     if (s) {
         trace_console_gfx_reuse(s->index);
         width = qemu_console_get_width(s, 0);
         height = qemu_console_get_height(s, 0);
     } else {
         trace_console_gfx_new();
         s = new_console(ds, GRAPHIC_CONSOLE, head);
         s->ui_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
                                    dpy_set_ui_info_timer, s);
     }
     graphic_console_set_hwops(s, hw_ops, opaque);
     if (dev) {
         object_property_set_link(OBJECT(s), "device", OBJECT(dev),
                                  &error_abort);
     }
 
     surface = qemu_create_placeholder_surface(width, height, noinit);
     dpy_gfx_replace_surface(s, surface);
     s->gl_unblock_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
                                        graphic_hw_gl_unblock_timer, s);
     return s;
 }
 
 static const GraphicHwOps unused_ops = {
     /* no callbacks */
 };
 
 void graphic_console_close(QemuConsole *con)
 {
     static const char unplugged[] =
         "Guest display has been unplugged";
     DisplaySurface *surface;
     int width = qemu_console_get_width(con, 640);
     int height = qemu_console_get_height(con, 480);
 
     trace_console_gfx_close(con->index);
     object_property_set_link(OBJECT(con), "device", NULL, &error_abort);
     graphic_console_set_hwops(con, &unused_ops, NULL);
 
     if (con->gl) {
         dpy_gl_scanout_disable(con);
     }
     surface = qemu_create_placeholder_surface(width, height, unplugged);
     dpy_gfx_replace_surface(con, surface);
 }
 
 QemuConsole *qemu_console_lookup_by_index(unsigned int index)
 {
     QemuConsole *con;
 
     QTAILQ_FOREACH(con, &consoles, next) {
         if (con->index == index) {
             return con;
         }
     }
     return NULL;
 }
 
 QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head)
 {
     QemuConsole *con;
     Object *obj;
     uint32_t h;
 
     QTAILQ_FOREACH(con, &consoles, next) {
         obj = object_property_get_link(OBJECT(con),
                                        "device", &error_abort);
         if (DEVICE(obj) != dev) {
             continue;
         }
         h = object_property_get_uint(OBJECT(con),
                                      "head", &error_abort);
         if (h != head) {
             continue;
         }
         return con;
     }
     return NULL;
 }
 
 QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
                                                 uint32_t head, Error **errp)
 {
     DeviceState *dev;
     QemuConsole *con;
 
     dev = qdev_find_recursive(sysbus_get_default(), device_id);
     if (dev == NULL) {
         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                   "Device '%s' not found", device_id);
         return NULL;
     }
 
     con = qemu_console_lookup_by_device(dev, head);
     if (con == NULL) {
         error_setg(errp, "Device %s (head %d) is not bound to a QemuConsole",
                    device_id, head);
         return NULL;
     }
 
     return con;
 }
 
 QemuConsole *qemu_console_lookup_unused(void)
 {
     QemuConsole *con;
     Object *obj;
 
     QTAILQ_FOREACH(con, &consoles, next) {
         if (con->hw_ops != &unused_ops) {
             continue;
         }
         obj = object_property_get_link(OBJECT(con),
                                        "device", &error_abort);
         if (obj != NULL) {
             continue;
         }
         return con;
     }
     return NULL;
 }
 
 bool qemu_console_is_visible(QemuConsole *con)
 {
     return (con == active_console) || (con->dcls > 0);
 }
 
 bool qemu_console_is_graphic(QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
     return con && (con->console_type == GRAPHIC_CONSOLE);
 }
 
 bool qemu_console_is_fixedsize(QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
     return con && (con->console_type != TEXT_CONSOLE);
 }
 
 bool qemu_console_is_gl_blocked(QemuConsole *con)
 {
     assert(con != NULL);
     return con->gl_block;
 }
 
 bool qemu_console_is_multihead(DeviceState *dev)
 {
     QemuConsole *con;
     Object *obj;
     uint32_t f = 0xffffffff;
     uint32_t h;
 
     QTAILQ_FOREACH(con, &consoles, next) {
         obj = object_property_get_link(OBJECT(con),
                                        "device", &error_abort);
         if (DEVICE(obj) != dev) {
             continue;
         }
 
         h = object_property_get_uint(OBJECT(con),
                                      "head", &error_abort);
         if (f == 0xffffffff) {
             f = h;
         } else if (h != f) {
             return true;
         }
     }
     return false;
 }
 
 char *qemu_console_get_label(QemuConsole *con)
 {
     if (con->console_type == GRAPHIC_CONSOLE) {
         if (con->device) {
             DeviceState *dev;
             bool multihead;
 
             dev = DEVICE(con->device);
             multihead = qemu_console_is_multihead(dev);
             if (multihead) {
                 return g_strdup_printf("%s.%d", dev->id ?
                                        dev->id :
                                        object_get_typename(con->device),
                                        con->head);
             } else {
                 return g_strdup_printf("%s", dev->id ?
                                        dev->id :
                                        object_get_typename(con->device));
             }
         }
         return g_strdup("VGA");
     } else {
         if (con->chr && con->chr->label) {
             return g_strdup(con->chr->label);
         }
         return g_strdup_printf("vc%d", con->index);
     }
 }
 
 int qemu_console_get_index(QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
     return con ? con->index : -1;
 }
 
 uint32_t qemu_console_get_head(QemuConsole *con)
 {
     if (con == NULL) {
         con = active_console;
     }
     return con ? con->head : -1;
 }
 
 int qemu_console_get_width(QemuConsole *con, int fallback)
 {
     if (con == NULL) {
         con = active_console;
     }
     if (con == NULL) {
         return fallback;
     }
     switch (con->scanout.kind) {
     case SCANOUT_DMABUF:
         return con->scanout.dmabuf->width;
     case SCANOUT_TEXTURE:
         return con->scanout.texture.width;
     case SCANOUT_SURFACE:
         return surface_width(con->surface);
     default:
         return fallback;
     }
 }
 
 int qemu_console_get_height(QemuConsole *con, int fallback)
 {
     if (con == NULL) {
         con = active_console;
     }
     if (con == NULL) {
         return fallback;
     }
     switch (con->scanout.kind) {
     case SCANOUT_DMABUF:
         return con->scanout.dmabuf->height;
     case SCANOUT_TEXTURE:
         return con->scanout.texture.height;
     case SCANOUT_SURFACE:
         return surface_height(con->surface);
     default:
         return fallback;
     }
 }
 
 static void vc_chr_accept_input(Chardev *chr)
 {
     VCChardev *drv = VC_CHARDEV(chr);
     QemuConsole *s = drv->console;
 
     kbd_send_chars(s);
 }
 
 static void vc_chr_set_echo(Chardev *chr, bool echo)
 {
     VCChardev *drv = VC_CHARDEV(chr);
     QemuConsole *s = drv->console;
 
     s->echo = echo;
 }
 
 static void text_console_update_cursor_timer(void)
 {
     timer_mod(cursor_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME)
               + CONSOLE_CURSOR_PERIOD / 2);
 }
 
 static void text_console_update_cursor(void *opaque)
 {
     QemuConsole *s;
     int count = 0;
 
     cursor_visible_phase = !cursor_visible_phase;
 
     QTAILQ_FOREACH(s, &consoles, next) {
         if (qemu_console_is_graphic(s) ||
             !qemu_console_is_visible(s)) {
             continue;
         }
         count++;
         graphic_hw_invalidate(s);
     }
 
     if (count) {
         text_console_update_cursor_timer();
     }
 }
 
 static const GraphicHwOps text_console_ops = {
     .invalidate  = text_console_invalidate,
     .text_update = text_console_update,
 };
 
 static void text_console_do_init(Chardev *chr, DisplayState *ds)
 {
     VCChardev *drv = VC_CHARDEV(chr);
     QemuConsole *s = drv->console;
     int g_width = 80 * FONT_WIDTH;
     int g_height = 24 * FONT_HEIGHT;
 
     fifo8_create(&s->out_fifo, 16);
     s->ds = ds;
 
     s->y_displayed = 0;
     s->y_base = 0;
     s->total_height = DEFAULT_BACKSCROLL;
     s->x = 0;
     s->y = 0;
     if (s->scanout.kind != SCANOUT_SURFACE) {
         if (active_console && active_console->scanout.kind == SCANOUT_SURFACE) {
             g_width = qemu_console_get_width(active_console, g_width);
             g_height = qemu_console_get_height(active_console, g_height);
         }
         s->surface = qemu_create_displaysurface(g_width, g_height);
         s->scanout.kind = SCANOUT_SURFACE;
     }
 
     s->hw_ops = &text_console_ops;
     s->hw = s;
 
     /* Set text attribute defaults */
     s->t_attrib_default.bold = 0;
     s->t_attrib_default.uline = 0;
     s->t_attrib_default.blink = 0;
     s->t_attrib_default.invers = 0;
     s->t_attrib_default.unvisible = 0;
     s->t_attrib_default.fgcol = QEMU_COLOR_WHITE;
     s->t_attrib_default.bgcol = QEMU_COLOR_BLACK;
     /* set current text attributes to default */
     s->t_attrib = s->t_attrib_default;
     text_console_resize(s);
 
     if (chr->label) {
         char *msg;
 
         s->t_attrib.bgcol = QEMU_COLOR_BLUE;
         msg = g_strdup_printf("%s console\r\n", chr->label);
         vc_chr_write(chr, (uint8_t *)msg, strlen(msg));
         g_free(msg);
         s->t_attrib = s->t_attrib_default;
     }
 
     qemu_chr_be_event(chr, CHR_EVENT_OPENED);
 }
 
 static void vc_chr_open(Chardev *chr,
                         ChardevBackend *backend,
                         bool *be_opened,
                         Error **errp)
 {
     ChardevVC *vc = backend->u.vc.data;
     VCChardev *drv = VC_CHARDEV(chr);
     QemuConsole *s;
     unsigned width = 0;
     unsigned height = 0;
 
     if (vc->has_width) {
         width = vc->width;
     } else if (vc->has_cols) {
         width = vc->cols * FONT_WIDTH;
     }
 
     if (vc->has_height) {
         height = vc->height;
     } else if (vc->has_rows) {
         height = vc->rows * FONT_HEIGHT;
     }
 
     trace_console_txt_new(width, height);
     if (width == 0 || height == 0) {
         s = new_console(NULL, TEXT_CONSOLE, 0);
     } else {
         s = new_console(NULL, TEXT_CONSOLE_FIXED_SIZE, 0);
         s->scanout.kind = SCANOUT_SURFACE;
         s->surface = qemu_create_displaysurface(width, height);
     }
 
     if (!s) {
         error_setg(errp, "cannot create text console");
         return;
     }
 
     s->chr = chr;
     drv->console = s;
 
     if (display_state) {
         text_console_do_init(chr, display_state);
     }
 
     /* console/chardev init sometimes completes elsewhere in a 2nd
      * stage, so defer OPENED events until they are fully initialized
      */
     *be_opened = false;
 }
 
 void qemu_console_resize(QemuConsole *s, int width, int height)
 {
     DisplaySurface *surface = qemu_console_surface(s);
 
     assert(s->console_type == GRAPHIC_CONSOLE);
 
     if ((s->scanout.kind != SCANOUT_SURFACE ||
          (surface && surface->flags & QEMU_ALLOCATED_FLAG)) &&
         qemu_console_get_width(s, -1) == width &&
         qemu_console_get_height(s, -1) == height) {
         return;
     }
 
     surface = qemu_create_displaysurface(width, height);
     dpy_gfx_replace_surface(s, surface);
 }
 
 DisplaySurface *qemu_console_surface(QemuConsole *console)
 {
     switch (console->scanout.kind) {
     case SCANOUT_SURFACE:
         return console->surface;
     default:
         return NULL;
     }
 }
 
 PixelFormat qemu_default_pixelformat(int bpp)
 {
     pixman_format_code_t fmt = qemu_default_pixman_format(bpp, true);
     PixelFormat pf = qemu_pixelformat_from_pixman(fmt);
     return pf;
 }
 
 static QemuDisplay *dpys[DISPLAY_TYPE__MAX];
 
 void qemu_display_register(QemuDisplay *ui)
 {
     assert(ui->type < DISPLAY_TYPE__MAX);
     dpys[ui->type] = ui;
 }
 
 bool qemu_display_find_default(DisplayOptions *opts)
 {
     static DisplayType prio[] = {
 #if defined(CONFIG_GTK)
         DISPLAY_TYPE_GTK,
 #endif
 #if defined(CONFIG_SDL)
         DISPLAY_TYPE_SDL,
 #endif
 #if defined(CONFIG_COCOA)
         DISPLAY_TYPE_COCOA
 #endif
     };
     int i;
 
     for (i = 0; i < (int)ARRAY_SIZE(prio); i++) {
         if (dpys[prio[i]] == NULL) {
             Error *local_err = NULL;
             int rv = ui_module_load(DisplayType_str(prio[i]), &local_err);
             if (rv < 0) {
                 error_report_err(local_err);
             }
         }
         if (dpys[prio[i]] == NULL) {
             continue;
         }
         opts->type = prio[i];
         return true;
     }
     return false;
 }
 
 void qemu_display_early_init(DisplayOptions *opts)
 {
     assert(opts->type < DISPLAY_TYPE__MAX);
     if (opts->type == DISPLAY_TYPE_NONE) {
         return;
     }
     if (dpys[opts->type] == NULL) {
         Error *local_err = NULL;
         int rv = ui_module_load(DisplayType_str(opts->type), &local_err);
         if (rv < 0) {
             error_report_err(local_err);
         }
     }
     if (dpys[opts->type] == NULL) {
         error_report("Display '%s' is not available.",
                      DisplayType_str(opts->type));
         exit(1);
     }
     if (dpys[opts->type]->early_init) {
         dpys[opts->type]->early_init(opts);
     }
 }
 
 void qemu_display_init(DisplayState *ds, DisplayOptions *opts)
 {
     assert(opts->type < DISPLAY_TYPE__MAX);
     if (opts->type == DISPLAY_TYPE_NONE) {
         return;
     }
     assert(dpys[opts->type] != NULL);
     dpys[opts->type]->init(ds, opts);
 }
 
 void qemu_display_help(void)
 {
     int idx;
 
     printf("Available display backend types:\n");
     printf("none\n");
     for (idx = DISPLAY_TYPE_NONE; idx < DISPLAY_TYPE__MAX; idx++) {
         if (!dpys[idx]) {
             Error *local_err = NULL;
             int rv = ui_module_load(DisplayType_str(idx), &local_err);
             if (rv < 0) {
                 error_report_err(local_err);
             }
         }
         if (dpys[idx]) {
             printf("%s\n",  DisplayType_str(dpys[idx]->type));
         }
     }
 }
 
 void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp)
 {
     int val;
     ChardevVC *vc;
 
     backend->type = CHARDEV_BACKEND_KIND_VC;
     vc = backend->u.vc.data = g_new0(ChardevVC, 1);
     qemu_chr_parse_common(opts, qapi_ChardevVC_base(vc));
 
     val = qemu_opt_get_number(opts, "width", 0);
     if (val != 0) {
         vc->has_width = true;
         vc->width = val;
     }
 
     val = qemu_opt_get_number(opts, "height", 0);
     if (val != 0) {
         vc->has_height = true;
         vc->height = val;
     }
 
     val = qemu_opt_get_number(opts, "cols", 0);
     if (val != 0) {
         vc->has_cols = true;
         vc->cols = val;
     }
 
     val = qemu_opt_get_number(opts, "rows", 0);
     if (val != 0) {
         vc->has_rows = true;
         vc->rows = val;
     }
 }
 
 static const TypeInfo qemu_console_info = {
     .name = TYPE_QEMU_CONSOLE,
     .parent = TYPE_OBJECT,
     .instance_size = sizeof(QemuConsole),
     .class_size = sizeof(QemuConsoleClass),
 };
 
 static void char_vc_class_init(ObjectClass *oc, void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);
 
     cc->parse = qemu_chr_parse_vc;
     cc->open = vc_chr_open;
     cc->chr_write = vc_chr_write;
     cc->chr_accept_input = vc_chr_accept_input;
     cc->chr_set_echo = vc_chr_set_echo;
 }
 
 static const TypeInfo char_vc_type_info = {
     .name = TYPE_CHARDEV_VC,
     .parent = TYPE_CHARDEV,
     .instance_size = sizeof(VCChardev),
     .class_init = char_vc_class_init,
 };
 
 void qemu_console_early_init(void)
 {
     /* set the default vc driver */
     if (!object_class_by_name(TYPE_CHARDEV_VC)) {
         type_register(&char_vc_type_info);
     }
 }
 
 static void register_types(void)
 {
     type_register_static(&qemu_console_info);
 }
 
 type_init(register_types);