Commit 3512779a authored by bellard's avatar bellard
Browse files

support for all VNC pixel formats


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1923 c046a42c-6fe2-441c-8c8c-71466251a162
parent 5c3ff3a7
......@@ -42,6 +42,14 @@ typedef struct VncState VncState;
typedef int VncReadEvent(VncState *vs, char *data, size_t len);
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,
int *has_bg, int *has_fg);
struct VncState
{
QEMUTimer *timer;
......@@ -53,12 +61,19 @@ struct VncState
int height;
uint64_t dirty_row[768];
char *old_data;
int depth;
int depth; /* internal VNC frame buffer byte per pixel */
int has_resize;
int has_hextile;
Buffer output;
Buffer input;
kbd_layout_t *kbd_layout;
/* current output mode information */
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;
VncReadEvent *read_handler;
size_t read_handler_expect;
......@@ -130,6 +145,66 @@ static void vnc_dpy_resize(DisplayState *ds, int w, int h)
}
}
/* fastest code */
static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
{
vnc_write(vs, pixels, size);
}
/* slowest but generic code. */
static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
{
unsigned int 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);
switch(vs->pix_bpp) {
case 1:
buf[0] = v;
break;
case 2:
if (vs->pix_big_endian) {
buf[0] = v >> 8;
buf[1] = v;
} else {
buf[1] = v >> 8;
buf[0] = v;
}
break;
default:
case 4:
if (vs->pix_big_endian) {
buf[0] = v >> 24;
buf[1] = v >> 16;
buf[2] = v >> 8;
buf[3] = v;
} else {
buf[3] = v >> 24;
buf[2] = v >> 16;
buf[1] = v >> 8;
buf[0] = v;
}
break;
}
}
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);
}
}
static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h)
{
int i;
......@@ -139,7 +214,7 @@ static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h
row = vs->ds->data + y * vs->ds->linesize + x * vs->depth;
for (i = 0; i < h; i++) {
vnc_write(vs, row, w * vs->depth);
vs->write_pixels(vs, row, w * vs->depth);
row += vs->ds->linesize;
}
}
......@@ -162,35 +237,26 @@ 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 32
#include "vnchextile.h"
#undef BPP
#undef GENERIC
static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h)
{
int i, j;
int has_fg, has_bg;
uint32_t last_fg32, last_bg32;
uint16_t last_fg16, last_bg16;
uint8_t last_fg8, last_bg8;
vnc_framebuffer_update(vs, x, y, w, h, 5);
has_fg = has_bg = 0;
for (j = y; j < (y + h); j += 16) {
for (i = x; i < (x + w); i += 16) {
switch (vs->depth) {
case 1:
send_hextile_tile_8(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j),
&last_bg8, &last_fg8, &has_bg, &has_fg);
break;
case 2:
send_hextile_tile_16(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j),
&last_bg16, &last_fg16, &has_bg, &has_fg);
break;
case 4:
send_hextile_tile_32(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j),
&last_bg32, &last_fg32, &has_bg, &has_fg);
break;
default:
break;
}
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);
}
}
}
......@@ -660,30 +726,79 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
}
}
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,
int red_max, int green_max, int blue_max,
int red_shift, int green_shift, int blue_shift)
{
switch (bits_per_pixel) {
case 32:
case 24:
vs->depth = 4;
break;
case 16:
vs->depth = 2;
break;
case 8:
vs->depth = 1;
break;
default:
int host_big_endian_flag;
#ifdef WORDS_BIGENDIAN
host_big_endian_flag = 1;
#else
host_big_endian_flag = 0;
#endif
if (!true_color_flag) {
fail:
vnc_client_error(vs);
break;
return;
}
if (bits_per_pixel == 32 &&
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) {
vs->depth = 4;
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_32;
} else
if (bits_per_pixel == 16 &&
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) {
vs->depth = 2;
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_16;
} else
if (bits_per_pixel == 8 &&
red_max == 7 && green_max == 7 && blue_max == 3 &&
red_shift == 5 && green_shift == 2 && blue_shift == 0) {
vs->depth = 1;
vs->write_pixels = vnc_write_pixels_copy;
vs->send_hextile_tile = send_hextile_tile_8;
} else
{
/* generic and slower case */
if (bits_per_pixel != 8 &&
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;
vs->pix_big_endian = big_endian_flag;
vs->write_pixels = vnc_write_pixels_generic;
vs->send_hextile_tile = send_hextile_tile_generic;
}
if (!true_color_flag)
vnc_client_error(vs);
vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height);
memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row));
......@@ -774,7 +889,11 @@ static int protocol_client_init(VncState *vs, char *data, size_t len)
vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */
vnc_write_u8(vs, vs->depth * 8); /* depth */
#ifdef WORDS_BIGENDIAN
vnc_write_u8(vs, 1); /* big-endian-flag */
#else
vnc_write_u8(vs, 0); /* big-endian-flag */
#endif
vnc_write_u8(vs, 1); /* true-color-flag */
if (vs->depth == 4) {
vnc_write_u16(vs, 0xFF); /* red-max */
......@@ -783,6 +902,7 @@ static int protocol_client_init(VncState *vs, char *data, size_t len)
vnc_write_u8(vs, 16); /* red-shift */
vnc_write_u8(vs, 8); /* green-shift */
vnc_write_u8(vs, 0); /* blue-shift */
vs->send_hextile_tile = send_hextile_tile_32;
} else if (vs->depth == 2) {
vnc_write_u16(vs, 31); /* red-max */
vnc_write_u16(vs, 63); /* green-max */
......@@ -790,14 +910,18 @@ static int protocol_client_init(VncState *vs, char *data, size_t len)
vnc_write_u8(vs, 11); /* red-shift */
vnc_write_u8(vs, 5); /* green-shift */
vnc_write_u8(vs, 0); /* blue-shift */
vs->send_hextile_tile = send_hextile_tile_16;
} else if (vs->depth == 1) {
vnc_write_u16(vs, 3); /* red-max */
/* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */
vnc_write_u16(vs, 7); /* red-max */
vnc_write_u16(vs, 7); /* green-max */
vnc_write_u16(vs, 3); /* blue-max */
vnc_write_u8(vs, 5); /* red-shift */
vnc_write_u8(vs, 2); /* green-shift */
vnc_write_u8(vs, 0); /* blue-shift */
vs->send_hextile_tile = send_hextile_tile_8;
}
vs->write_pixels = vnc_write_pixels_copy;
vnc_write(vs, pad, 3); /* padding */
......
#define CONCAT_I(a, b) a ## b
#define CONCAT(a, b) CONCAT_I(a, b)
#define pixel_t CONCAT(uint, CONCAT(BPP, _t))
static void CONCAT(send_hextile_tile_, BPP)(VncState *vs,
int x, int y, int w, int h,
pixel_t *last_bg, pixel_t *last_fg,
int *has_bg, int *has_fg)
#ifdef GENERIC
#define NAME generic
#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,
int *has_bg, int *has_fg)
{
char *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 bg = 0;
pixel_t fg = 0;
int n_colors = 0;
......@@ -122,10 +130,15 @@ static void CONCAT(send_hextile_tile_, BPP)(VncState *vs,
has_color = 1;
} else if (irow[i] != color) {
has_color = 0;
#ifdef GENERIC
vnc_convert_pixel(vs, data + n_data, color);
n_data += vs->pix_bpp;
#else
memcpy(data + n_data, &color, sizeof(color));
hextile_enc_cord(data + n_data + sizeof(pixel_t), min_x, j, i - min_x, 1);
n_data += 2 + sizeof(pixel_t);
n_data += sizeof(pixel_t);
#endif
hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
n_data += 2;
n_subtiles++;
min_x = -1;
......@@ -137,9 +150,15 @@ static void CONCAT(send_hextile_tile_, BPP)(VncState *vs,
}
}
if (has_color) {
memcpy(data + n_data, &color, sizeof(color));
hextile_enc_cord(data + n_data + sizeof(pixel_t), min_x, j, i - min_x, 1);
n_data += 2 + sizeof(pixel_t);
#ifdef GENERIC
vnc_convert_pixel(vs, data + n_data, color);
n_data += vs->pix_bpp;
#else
memcpy(data + n_data, &color, sizeof(color));
n_data += sizeof(pixel_t);
#endif
hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
n_data += 2;
n_subtiles++;
}
irow += vs->ds->linesize / sizeof(pixel_t);
......@@ -169,21 +188,22 @@ static void CONCAT(send_hextile_tile_, BPP)(VncState *vs,
vnc_write_u8(vs, flags);
if (n_colors < 4) {
if (flags & 0x02)
vnc_write(vs, last_bg, sizeof(pixel_t));
vs->write_pixels(vs, last_bg, sizeof(pixel_t));
if (flags & 0x04)
vnc_write(vs, last_fg, sizeof(pixel_t));
vs->write_pixels(vs, last_fg, sizeof(pixel_t));
if (n_subtiles) {
vnc_write_u8(vs, n_subtiles);
vnc_write(vs, data, n_data);
}
} else {
for (j = 0; j < h; j++) {
vnc_write(vs, row, w * vs->depth);
vs->write_pixels(vs, row, w * vs->depth);
row += vs->ds->linesize;
}
}
}
#undef NAME
#undef pixel_t
#undef CONCAT_I
#undef CONCAT
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