DisplayState interface change (Stefano Stabellini)

This patch changes the DisplayState interface adding support for
multiple frontends at the same time (sdl and vnc) and implements most
of the benefit of the shared_buf patch without the added complexity.

Currently DisplayState is managed by sdl (or vnc) and sdl (or vnc) is
also responsible for allocating the data and setting the depth.
Vga.c (or another backend) will do any necessary conversion.

The idea is to change it so that is vga.c (or another backend) together
with console.c that fully manage the DisplayState interface allocating
data and setting the depth (either 16 or 32 bit, if the guest uses a
different resolution or is in text mode, vga.c (or another backend) is
in charge of doing the conversion seamlessly).

The other idea is that DisplayState supports *multiple* frontends
like sdl and vnc; each of them can register some callbacks to be called
when a display event occurs.

The interesting changes are:

- the new structures and related functions in console.h and console.c

in particular the following functions are very helpful to manage a
DisplaySurface:

qemu_create_displaysurface
qemu_resize_displaysurface
qemu_create_displaysurface_from
qemu_free_displaysurface

- console_select and qemu_console_resize in console.c
this two functions manage multiple consoles on a single host display

- moving code around in hw/vga.c
as for the shared_buf patch this is necessary to be able to handle a dynamic
DisplaySurface bpp

- changes to vga_draw_graphic in hw/vga.c
this is the place where the DisplaySurface buffer is shared with the
videoram, when possible;


Compared to the last version the only changes are:

- do not remove support to dpy_copy in cirrus_vga
- change the name of the displaysurface handling functions

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6336 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 69 insertions, 32 deletions

diff --git a/hw/vga.c b/hw/vga.c
index ce8ca45956..f2d98b098d 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -1243,6 +1243,10 @@ static void vga_get_text_resolution(VGAState *s, int *pwidth, int *pheight,
     *pcheight = cheight;
 }
 
+typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
+
+static rgb_to_pixel_dup_func *rgb_to_pixel_dup_table[NB_DEPTHS];
+
 /*
  * Text mode update
  * Missing:
@@ -1266,9 +1270,6 @@ static void vga_draw_text(VGAState *s, int full_update)
 
     vga_dirty_log_stop(s);
 
-    full_update |= update_palette16(s);
-    palette = s->last_palette;
-
     /* compute font data address (in plane 2) */
     v = s->sr[3];
     offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
@@ -1303,16 +1304,23 @@ static void vga_draw_text(VGAState *s, int full_update)
     }
 
     if (width != s->last_width || height != s->last_height ||
-        cw != s->last_cw || cheight != s->last_ch) {
+        cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
         s->last_scr_width = width * cw;
         s->last_scr_height = height * cheight;
         qemu_console_resize(s->console, s->last_scr_width, s->last_scr_height);
+        s->last_depth = 0;
         s->last_width = width;
         s->last_height = height;
         s->last_ch = cheight;
         s->last_cw = cw;
         full_update = 1;
     }
+    s->rgb_to_pixel =
+        rgb_to_pixel_dup_table[get_depth_index(s->ds)];
+    full_update |= update_palette16(s);
+    palette = s->last_palette;
+    x_incr = cw * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
+
     cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr;
     if (cursor_offset != s->cursor_offset ||
         s->cr[0xa] != s->cursor_start ||
@@ -1504,8 +1512,6 @@ static vga_draw_line_func *vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
     vga_draw_line32_16bgr,
 };
 
-typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
-
 static rgb_to_pixel_dup_func *rgb_to_pixel_dup_table[NB_DEPTHS] = {
     rgb_to_pixel8_dup,
     rgb_to_pixel15_dup,
@@ -1580,7 +1586,7 @@ static void vga_sync_dirty_bitmap(VGAState *s)
  */
 static void vga_draw_graphic(VGAState *s, int full_update)
 {
-    int y1, y, update, page_min, page_max, linesize, y_start, double_scan, mask;
+    int y1, y, update, page_min, page_max, linesize, y_start, double_scan, mask, depth;
     int width, height, shift_control, line_offset, page0, page1, bwidth, bits;
     int disp_width, multi_scan, multi_run;
     uint8_t *d;
@@ -1663,16 +1669,41 @@ static void vga_draw_graphic(VGAState *s, int full_update)
     }
     vga_draw_line = vga_draw_line_table[v * NB_DEPTHS + get_depth_index(s->ds)];
 
-    if (disp_width != s->last_width ||
-        height != s->last_height) {
-        qemu_console_resize(s->console, disp_width, height);
+    depth = s->get_bpp(s);
+    if (s->line_offset != s->last_line_offset ||
+        disp_width != s->last_width ||
+        height != s->last_height ||
+        s->last_depth != depth) {
+        if (depth == 16 || depth == 32) {
+            if (is_graphic_console()) {
+                qemu_free_displaysurface(s->ds->surface);
+                s->ds->surface = qemu_create_displaysurface_from(disp_width, height, depth,
+                                                               s->line_offset,
+                                                               s->vram_ptr + (s->start_addr * 4));
+                dpy_resize(s->ds);
+            } else {
+                qemu_console_resize(s->console, disp_width, height);
+            }
+        } else {
+            qemu_console_resize(s->console, disp_width, height);
+        }
         s->last_scr_width = disp_width;
         s->last_scr_height = height;
         s->last_width = disp_width;
         s->last_height = height;
+        s->last_line_offset = s->line_offset;
+        s->last_depth = depth;
         full_update = 1;
+    } else if (is_graphic_console() && is_buffer_shared(s->ds->surface) &&
+               (full_update || s->ds->surface->data != s->vram_ptr + (s->start_addr * 4))) {
+        s->ds->surface->data = s->vram_ptr + (s->start_addr * 4);
+        dpy_setdata(s->ds);
     }
-    if (s->cursor_invalidate)
+
+    s->rgb_to_pixel =
+        rgb_to_pixel_dup_table[get_depth_index(s->ds)];
+
+    if (!is_buffer_shared(s->ds->surface) && s->cursor_invalidate)
         s->cursor_invalidate(s);
 
     line_offset = s->line_offset;
@@ -1718,9 +1749,11 @@ static void vga_draw_graphic(VGAState *s, int full_update)
                 page_min = page0;
             if (page1 > page_max)
                 page_max = page1;
-            vga_draw_line(s, d, s->vram_ptr + addr, width);
-            if (s->cursor_draw_line)
-                s->cursor_draw_line(s, d, y);
+            if (!(is_buffer_shared(s->ds->surface))) {
+                vga_draw_line(s, d, s->vram_ptr + addr, width);
+                if (s->cursor_draw_line)
+                    s->cursor_draw_line(s, d, y);
+            }
         } else {
             if (y_start >= 0) {
                 /* flush to display */
@@ -1767,6 +1800,8 @@ static void vga_draw_blank(VGAState *s, int full_update)
         return;
     vga_dirty_log_stop(s);
 
+    s->rgb_to_pixel =
+        rgb_to_pixel_dup_table[get_depth_index(s->ds)];
     if (ds_get_bits_per_pixel(s->ds) == 8)
         val = s->rgb_to_pixel(0, 0, 0);
     else
@@ -1793,9 +1828,6 @@ static void vga_update_display(void *opaque)
     if (ds_get_bits_per_pixel(s->ds) == 0) {
         /* nothing to do */
     } else {
-        s->rgb_to_pixel =
-            rgb_to_pixel_dup_table[get_depth_index(s->ds)];
-
         full_update = 0;
         if (!(s->ar_index & 0x20)) {
             graphic_mode = GMODE_BLANK;
@@ -1966,7 +1998,9 @@ static void vga_update_text(void *opaque, console_ch_t *chardata)
             cw != s->last_cw || cheight != s->last_ch) {
             s->last_scr_width = width * cw;
             s->last_scr_height = height * cheight;
-            qemu_console_resize(s->console, width, height);
+            s->ds->surface->width = width;
+            s->ds->surface->height = height;
+            dpy_resize(s->ds);
             s->last_width = width;
             s->last_height = height;
             s->last_ch = cheight;
@@ -2047,7 +2081,9 @@ static void vga_update_text(void *opaque, console_ch_t *chardata)
     s->last_width = 60;
     s->last_height = height = 3;
     dpy_cursor(s->ds, -1, -1);
-    qemu_console_resize(s->console, s->last_width, height);
+    s->ds->surface->width = s->last_width;
+    s->ds->surface->height = height;
+    dpy_resize(s->ds);
 
     for (dst = chardata, i = 0; i < s->last_width * height; i ++)
         console_write_ch(dst ++, ' ');
@@ -2505,12 +2541,8 @@ static void vga_save_dpy_update(DisplayState *s,
 {
 }
 
-static void vga_save_dpy_resize(DisplayState *s, int w, int h)
+static void vga_save_dpy_resize(DisplayState *s)
 {
-    s->linesize = w * 4;
-    s->data = qemu_mallocz(h * s->linesize);
-    vga_save_w = w;
-    vga_save_h = h;
 }
 
 static void vga_save_dpy_refresh(DisplayState *s)
@@ -2570,24 +2602,29 @@ static void vga_screen_dump_common(VGAState *s, const char *filename,
                                    int w, int h)
 {
     DisplayState *saved_ds, ds1, *ds = &ds1;
+    DisplayChangeListener dcl;
 
     /* XXX: this is a little hackish */
     vga_invalidate_display(s);
     saved_ds = s->ds;
 
     memset(ds, 0, sizeof(DisplayState));
-    ds->dpy_update = vga_save_dpy_update;
-    ds->dpy_resize = vga_save_dpy_resize;
-    ds->dpy_refresh = vga_save_dpy_refresh;
-    ds->depth = 32;
+    memset(&dcl, 0, sizeof(DisplayChangeListener));
+    dcl.dpy_update = vga_save_dpy_update;
+    dcl.dpy_resize = vga_save_dpy_resize;
+    dcl.dpy_refresh = vga_save_dpy_refresh;
+    register_displaychangelistener(ds, &dcl);
+    ds->surface = qemu_create_displaysurface(ds_get_width(saved_ds),
+            ds_get_height(saved_ds), 32, 4 * ds_get_width(saved_ds));
 
-    ds->linesize = w * sizeof(uint32_t);
-    ds->data = qemu_mallocz(h * ds->linesize);
     s->ds = ds;
     s->graphic_mode = -1;
     vga_update_display(s);
-    ppm_save(filename, ds->data, w, h, ds->linesize);
-    qemu_free(ds->data);
+
+    ppm_save(filename, ds_get_data(ds), vga_save_w, vga_save_h,
+            ds_get_linesize(ds));
+
+    qemu_free_displaysurface(ds->surface);
     s->ds = saved_ds;
 }