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vnc dynamic resolution (Stefano Stabellini) 

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@5229 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-09-15 16:03:41 +00:00
parent 82b36dc398
commit 7eac3a87f1
2 changed files with 176 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

216
vnc.c
View File

@ -71,8 +71,8 @@ typedef void VncWritePixels(VncState *vs, void *data, int size);
typedef void VncSendHextileTile(VncState *vs,
int x, int y, int w, int h,
uint32_t *last_bg,
uint32_t *last_fg,
void *last_bg,
void *last_fg,
int *has_bg, int *has_fg);
#define VNC_MAX_WIDTH 2048
@ -164,9 +164,9 @@ struct VncState
VncWritePixels *write_pixels;
VncSendHextileTile *send_hextile_tile;
int pix_bpp, pix_big_endian;
int red_shift, red_max, red_shift1;
int green_shift, green_max, green_shift1;
int blue_shift, blue_max, blue_shift1;
int client_red_shift, client_red_max, server_red_shift, server_red_max;
int client_green_shift, client_green_max, server_green_shift, server_green_max;
int client_blue_shift, client_blue_max, server_blue_shift, server_blue_max;
VncReadEvent *read_handler;
size_t read_handler_expect;
@ -208,6 +208,8 @@ static void vnc_flush(VncState *vs);
static void vnc_update_client(void *opaque);
static void vnc_client_read(void *opaque);
static void vnc_colordepth(DisplayState *ds, int depth);
static inline void vnc_set_bit(uint32_t *d, int k)
{
d[k >> 5] |= 1 << (k & 0x1f);
@ -330,14 +332,17 @@ static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
/* slowest but generic code. */
static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
{
unsigned int r, g, b;
uint8_t r, g, b;
r = (v >> vs->red_shift1) & vs->red_max;
g = (v >> vs->green_shift1) & vs->green_max;
b = (v >> vs->blue_shift1) & vs->blue_max;
v = (r << vs->red_shift) |
(g << vs->green_shift) |
(b << vs->blue_shift);
r = ((v >> vs->server_red_shift) & vs->server_red_max) * (vs->client_red_max + 1) /
(vs->server_red_max + 1);
g = ((v >> vs->server_green_shift) & vs->server_green_max) * (vs->client_green_max + 1) /
(vs->server_green_max + 1);
b = ((v >> vs->server_blue_shift) & vs->server_blue_max) * (vs->client_blue_max + 1) /
(vs->server_blue_max + 1);
v = (r << vs->client_red_shift) |
(g << vs->client_green_shift) |
(b << vs->client_blue_shift);
switch(vs->pix_bpp) {
case 1:
buf[0] = v;
@ -370,14 +375,34 @@ static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size)
{
uint32_t *pixels = pixels1;
uint8_t buf[4];
int n, i;
n = size >> 2;
for(i = 0; i < n; i++) {
vnc_convert_pixel(vs, buf, pixels[i]);
vnc_write(vs, buf, vs->pix_bpp);
if (vs->depth == 4) {
uint32_t *pixels = pixels1;
int n, i;
n = size >> 2;
for(i = 0; i < n; i++) {
vnc_convert_pixel(vs, buf, pixels[i]);
vnc_write(vs, buf, vs->pix_bpp);
}
} else if (vs->depth == 2) {
uint16_t *pixels = pixels1;
int n, i;
n = size >> 1;
for(i = 0; i < n; i++) {
vnc_convert_pixel(vs, buf, pixels[i]);
vnc_write(vs, buf, vs->pix_bpp);
}
} else if (vs->depth == 1) {
uint8_t *pixels = pixels1;
int n, i;
n = size;
for(i = 0; i < n; i++) {
vnc_convert_pixel(vs, buf, pixels[i]);
vnc_write(vs, buf, vs->pix_bpp);
}
} else {
fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
}
}
@ -413,6 +438,18 @@ static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
#include "vnchextile.h"
#undef BPP
#define GENERIC
#define BPP 8
#include "vnchextile.h"
#undef BPP
#undef GENERIC
#define GENERIC
#define BPP 16
#include "vnchextile.h"
#undef BPP
#undef GENERIC
#define GENERIC
#define BPP 32
#include "vnchextile.h"
@ -423,18 +460,23 @@ static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, i
{
int i, j;
int has_fg, has_bg;
uint32_t last_fg32, last_bg32;
uint8_t *last_fg, *last_bg;
vnc_framebuffer_update(vs, x, y, w, h, 5);
last_fg = (uint8_t *) malloc(vs->depth);
last_bg = (uint8_t *) malloc(vs->depth);
has_fg = has_bg = 0;
for (j = y; j < (y + h); j += 16) {
for (i = x; i < (x + w); i += 16) {
vs->send_hextile_tile(vs, i, j,
MIN(16, x + w - i), MIN(16, y + h - j),
&last_bg32, &last_fg32, &has_bg, &has_fg);
last_bg, last_fg, &has_bg, &has_fg);
}
}
free(last_fg);
free(last_bg);
}
static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
@ -1133,17 +1175,6 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
check_pointer_type_change(vs, kbd_mouse_is_absolute());
}
static int compute_nbits(unsigned int val)
{
int n;
n = 0;
while (val != 0) {
n++;
val >>= 1;
}
return n;
}
static void set_pixel_format(VncState *vs,
int bits_per_pixel, int depth,
int big_endian_flag, int true_color_flag,
@ -1163,6 +1194,7 @@ static void set_pixel_format(VncState *vs,
return;
}
if (bits_per_pixel == 32 &&
bits_per_pixel == vs->depth * 8 &&
host_big_endian_flag == big_endian_flag &&
red_max == 0xff && green_max == 0xff && blue_max == 0xff &&
red_shift == 16 && green_shift == 8 && blue_shift == 0) {
@ -1171,6 +1203,7 @@ static void set_pixel_format(VncState *vs,
vs->send_hextile_tile = send_hextile_tile_32;
} else
if (bits_per_pixel == 16 &&
bits_per_pixel == vs->depth * 8 &&
host_big_endian_flag == big_endian_flag &&
red_max == 31 && green_max == 63 && blue_max == 31 &&
red_shift == 11 && green_shift == 5 && blue_shift == 0) {
@ -1179,6 +1212,7 @@ static void set_pixel_format(VncState *vs,
vs->send_hextile_tile = send_hextile_tile_16;
} else
if (bits_per_pixel == 8 &&
bits_per_pixel == vs->depth * 8 &&
red_max == 7 && green_max == 7 && blue_max == 3 &&
red_shift == 5 && green_shift == 2 && blue_shift == 0) {
vs->depth = 1;
@ -1191,28 +1225,116 @@ static void set_pixel_format(VncState *vs,
bits_per_pixel != 16 &&
bits_per_pixel != 32)
goto fail;
vs->depth = 4;
vs->red_shift = red_shift;
vs->red_max = red_max;
vs->red_shift1 = 24 - compute_nbits(red_max);
vs->green_shift = green_shift;
vs->green_max = green_max;
vs->green_shift1 = 16 - compute_nbits(green_max);
vs->blue_shift = blue_shift;
vs->blue_max = blue_max;
vs->blue_shift1 = 8 - compute_nbits(blue_max);
vs->pix_bpp = bits_per_pixel / 8;
if (vs->depth == 4) {
vs->send_hextile_tile = send_hextile_tile_generic_32;
} else if (vs->depth == 2) {
vs->send_hextile_tile = send_hextile_tile_generic_16;
} else {
vs->send_hextile_tile = send_hextile_tile_generic_8;
}
vs->pix_big_endian = big_endian_flag;
vs->write_pixels = vnc_write_pixels_generic;
vs->send_hextile_tile = send_hextile_tile_generic;
}
vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height);
vs->client_red_shift = red_shift;
vs->client_red_max = red_max;
vs->client_green_shift = green_shift;
vs->client_green_max = green_max;
vs->client_blue_shift = blue_shift;
vs->client_blue_max = blue_max;
vs->pix_bpp = bits_per_pixel / 8;
vga_hw_invalidate();
vga_hw_update();
}
static void vnc_colordepth(DisplayState *ds, int depth)
{
int host_big_endian_flag;
struct VncState *vs = ds->opaque;
switch (depth) {
case 24:
if (ds->depth == 32) return;
depth = 32;
break;
case 15:
case 8:
case 0:
return;
default:
break;
}
#ifdef WORDS_BIGENDIAN
host_big_endian_flag = 1;
#else
host_big_endian_flag = 0;
#endif
switch (depth) {
case 8:
vs->depth = depth / 8;
vs->server_red_max = 7;
vs->server_green_max = 7;
vs->server_blue_max = 3;
vs->server_red_shift = 5;
vs->server_green_shift = 2;
vs->server_blue_shift = 0;
break;
case 16:
vs->depth = depth / 8;
vs->server_red_max = 31;
vs->server_green_max = 63;
vs->server_blue_max = 31;
vs->server_red_shift = 11;
vs->server_green_shift = 5;
vs->server_blue_shift = 0;
break;
case 32:
vs->depth = 4;
vs->server_red_max = 255;
vs->server_green_max = 255;
vs->server_blue_max = 255;
vs->server_red_shift = 16;
vs->server_green_shift = 8;
vs->server_blue_shift = 0;
break;
default:
return;
}
if (vs->pix_bpp == 4 && vs->depth == 4 &&
host_big_endian_flag == vs->pix_big_endian &&
vs->client_red_max == 0xff && vs->client_green_max == 0xff && vs->client_blue_max == 0xff &&
vs->client_red_shift == 16 && vs->client_green_shift == 8 && vs->client_blue_shift == 0) {
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_32;
} else if (vs->pix_bpp == 2 && vs->depth == 2 &&
host_big_endian_flag == vs->pix_big_endian &&
vs->client_red_max == 31 && vs->client_green_max == 63 && vs->client_blue_max == 31 &&
vs->client_red_shift == 11 && vs->client_green_shift == 5 && vs->client_blue_shift == 0) {
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_16;
} else if (vs->pix_bpp == 1 && vs->depth == 1 &&
host_big_endian_flag == vs->pix_big_endian &&
vs->client_red_max == 7 && vs->client_green_max == 7 && vs->client_blue_max == 3 &&
vs->client_red_shift == 5 && vs->client_green_shift == 2 && vs->client_blue_shift == 0) {
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_8;
} else {
if (vs->depth == 4) {
vs->send_hextile_tile = send_hextile_tile_generic_32;
} else if (vs->depth == 2) {
vs->send_hextile_tile = send_hextile_tile_generic_16;
} else {
vs->send_hextile_tile = send_hextile_tile_generic_8;
}
vs->write_pixels = vnc_write_pixels_generic;
}
}
static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
{
int i;
@ -1316,7 +1438,9 @@ static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
vnc_write_u16(vs, vs->ds->height);
vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */
vnc_write_u8(vs, vs->depth * 8); /* depth */
if (vs->depth == 4) vnc_write_u8(vs, 24); /* depth */
else vnc_write_u8(vs, vs->depth * 8); /* depth */
#ifdef WORDS_BIGENDIAN
vnc_write_u8(vs, 1); /* big-endian-flag */
#else
@ -2006,7 +2130,6 @@ void vnc_display_init(DisplayState *ds)
vs->lsock = -1;
vs->csock = -1;
vs->depth = 4;
vs->last_x = -1;
vs->last_y = -1;
@ -2027,6 +2150,7 @@ void vnc_display_init(DisplayState *ds)
vs->ds->dpy_resize = vnc_dpy_resize;
vs->ds->dpy_refresh = NULL;
vnc_colordepth(vs->ds, 32);
vnc_dpy_resize(vs->ds, 640, 400);
}

12
vnchextile.h
View File

@ -2,29 +2,29 @@
#define CONCAT(a, b) CONCAT_I(a, b)
#define pixel_t CONCAT(uint, CONCAT(BPP, _t))
#ifdef GENERIC
#define NAME generic
#define NAME CONCAT(generic_, BPP)
#else
#define NAME BPP
#endif
static void CONCAT(send_hextile_tile_, NAME)(VncState *vs,
int x, int y, int w, int h,
uint32_t *last_bg32,
uint32_t *last_fg32,
void *last_bg_,
void *last_fg_,
int *has_bg, int *has_fg)
{
uint8_t *row = (vs->ds->data + y * vs->ds->linesize + x * vs->depth);
pixel_t *irow = (pixel_t *)row;
int j, i;
pixel_t *last_bg = (pixel_t *)last_bg32;
pixel_t *last_fg = (pixel_t *)last_fg32;
pixel_t *last_bg = (pixel_t *)last_bg_;
pixel_t *last_fg = (pixel_t *)last_fg_;
pixel_t bg = 0;
pixel_t fg = 0;
int n_colors = 0;
int bg_count = 0;
int fg_count = 0;
int flags = 0;
uint8_t data[(sizeof(pixel_t) + 2) * 16 * 16];
uint8_t data[(vs->pix_bpp + 2) * 16 * 16];
int n_data = 0;
int n_subtiles = 0;