mirror of
https://github.com/xemu-project/xemu.git
synced 2025-05-13 10:36:44 +00:00
9f64916da2
The vnc code uses *three* DisplaySurfaces: First is the surface of the actual QemuConsole, usually the guest screen, but could also be a text console (monitor/serial reachable via Ctrl-Alt-<nr> keys). This is left as-is. Second is the current server's view of the screen content. The vnc code uses this to figure which parts of the guest screen did _really_ change to reduce the amount of updates sent to the vnc clients. It is also used as data source when sending out the updates to the clients. This surface gets replaced by a pixman image. The format changes too, instead of using the guest screen format we'll use fixed 32bit rgb framebuffer and convert the pixels on the fly when comparing and updating the server framebuffer. Third surface carries the format expected by the vnc client. That isn't used to store image data. This surface is switched to PixelFormat and a boolean for bigendian byte order. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
|
|
* QEMU VNC display driver: hextile encoding
|
|
*
|
|
* Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
|
|
* Copyright (C) 2006 Fabrice Bellard
|
|
* Copyright (C) 2009 Red Hat, Inc
|
|
*
|
|
* 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 "vnc.h"
|
|
|
|
static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
|
|
{
|
|
ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
|
|
ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
|
|
}
|
|
|
|
#define BPP 8
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
|
|
#define BPP 16
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
|
|
#define BPP 32
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
|
|
#define GENERIC
|
|
#define BPP 8
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
#define GENERIC
|
|
#define BPP 16
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
#define GENERIC
|
|
#define BPP 32
|
|
#include "vnc-enc-hextile-template.h"
|
|
#undef BPP
|
|
#undef GENERIC
|
|
|
|
int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
|
|
int y, int w, int h)
|
|
{
|
|
int i, j;
|
|
int has_fg, has_bg;
|
|
uint8_t *last_fg, *last_bg;
|
|
|
|
last_fg = (uint8_t *) g_malloc(VNC_SERVER_FB_BYTES);
|
|
last_bg = (uint8_t *) g_malloc(VNC_SERVER_FB_BYTES);
|
|
has_fg = has_bg = 0;
|
|
for (j = y; j < (y + h); j += 16) {
|
|
for (i = x; i < (x + w); i += 16) {
|
|
vs->hextile.send_tile(vs, i, j,
|
|
MIN(16, x + w - i), MIN(16, y + h - j),
|
|
last_bg, last_fg, &has_bg, &has_fg);
|
|
}
|
|
}
|
|
g_free(last_fg);
|
|
g_free(last_bg);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
|
|
{
|
|
if (!generic) {
|
|
switch (VNC_SERVER_FB_BITS) {
|
|
case 8:
|
|
vs->hextile.send_tile = send_hextile_tile_8;
|
|
break;
|
|
case 16:
|
|
vs->hextile.send_tile = send_hextile_tile_16;
|
|
break;
|
|
case 32:
|
|
vs->hextile.send_tile = send_hextile_tile_32;
|
|
break;
|
|
}
|
|
} else {
|
|
switch (VNC_SERVER_FB_BITS) {
|
|
case 8:
|
|
vs->hextile.send_tile = send_hextile_tile_generic_8;
|
|
break;
|
|
case 16:
|
|
vs->hextile.send_tile = send_hextile_tile_generic_16;
|
|
break;
|
|
case 32:
|
|
vs->hextile.send_tile = send_hextile_tile_generic_32;
|
|
break;
|
|
}
|
|
}
|
|
}
|