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gtk/gdk/broadway/broadway.c

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[broadway] Import broadway lib We put this in gtk+ for now since it will be synced initially, but it avoids using glib so that it can be used lower in the stack if required (e.g. in cairo later).
2010-11-16 11:42:53 +00:00
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <arpa/inet.h>
#include <zlib.h>
#include "broadway.h"
/************************************************************************
* Basic helpers *
************************************************************************/
#define TRUE 1
#define FALSE 0
typedef unsigned char uchar;
typedef int boolean;
static void *
bw_malloc(size_t size)
{
void *ptr;
ptr = malloc(size);
if (ptr == NULL)
exit(1);
return ptr;
}
static void *
bw_malloc0(size_t size)
{
void *ptr;
ptr = calloc(size, 1);
if (ptr == NULL)
exit(1);
return ptr;
}
#define bw_new(struct_type, n_structs) (bw_malloc(sizeof(struct_type) * (n_structs)))
#define bw_new0(struct_type, n_structs) (bw_malloc0(sizeof(struct_type) * (n_structs)))
/************************************************************************
* Base64 implementation, from glib *
************************************************************************/
static const char base64_alphabet[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static size_t
bw_base64_encode_step (const uchar *in,
size_t len,
boolean break_lines,
char *out,
int *state,
int *save)
{
char *outptr;
const uchar *inptr;
if (len <= 0)
return 0;
inptr = in;
outptr = out;
if (len + ((char *) save) [0] > 2)
{
const uchar *inend = in+len-2;
int c1, c2, c3;
int already;
already = *state;
switch (((char *) save) [0])
{
case 1:
c1 = ((unsigned char *) save) [1];
goto skip1;
case 2:
c1 = ((unsigned char *) save) [1];
c2 = ((unsigned char *) save) [2];
goto skip2;
}
/*
* yes, we jump into the loop, no i'm not going to change it,
* it's beautiful!
*/
while (inptr < inend)
{
c1 = *inptr++;
skip1:
c2 = *inptr++;
skip2:
c3 = *inptr++;
*outptr++ = base64_alphabet [ c1 >> 2 ];
*outptr++ = base64_alphabet [ c2 >> 4 |
((c1&0x3) << 4) ];
*outptr++ = base64_alphabet [ ((c2 &0x0f) << 2) |
(c3 >> 6) ];
*outptr++ = base64_alphabet [ c3 & 0x3f ];
/* this is a bit ugly ... */
if (break_lines && (++already) >= 19)
{
*outptr++ = '\n';
already = 0;
}
}
((char *)save)[0] = 0;
len = 2 - (inptr - inend);
*state = already;
}
if (len>0)
{
char *saveout;
/* points to the slot for the next char to save */
saveout = & (((char *)save)[1]) + ((char *)save)[0];
/* len can only be 0 1 or 2 */
switch(len)
{
case 2: *saveout++ = *inptr++;
case 1: *saveout++ = *inptr++;
}
((char *)save)[0] += len;
}
return outptr - out;
}
static size_t
bw_base64_encode_close (boolean break_lines,
char *out,
int *state,
int *save)
{
int c1, c2;
char *outptr = out;
c1 = ((unsigned char *) save) [1];
c2 = ((unsigned char *) save) [2];
switch (((char *) save) [0])
{
case 2:
outptr [2] = base64_alphabet[ ( (c2 &0x0f) << 2 ) ];
assert (outptr [2] != 0);
goto skip;
case 1:
outptr[2] = '=';
skip:
outptr [0] = base64_alphabet [ c1 >> 2 ];
outptr [1] = base64_alphabet [ c2 >> 4 | ( (c1&0x3) << 4 )];
outptr [3] = '=';
outptr += 4;
break;
}
if (break_lines)
*outptr++ = '\n';
*save = 0;
*state = 0;
return outptr - out;
}
#if 0
static void
base64_uint8 (uint8_t v, char *c)
{
c[0] = base64_alphabet[(v >> 0) & 0x3f];
c[1] = base64_alphabet[(v >> 6) & 0x3];
}
#endif
static void
base64_uint16 (uint32_t v, char *c)
{
c[0] = base64_alphabet[(v >> 0) & 0x3f];
c[1] = base64_alphabet[(v >> 6) & 0x3f];
c[2] = base64_alphabet[(v >> 12) & 0xf];
}
#if 0
static void
base64_uint24 (uint32_t v, char *c)
{
c[0] = base64_alphabet[(v >> 0) & 0x3f];
c[1] = base64_alphabet[(v >> 6) & 0x3f];
c[2] = base64_alphabet[(v >> 12) & 0x3f];
c[3] = base64_alphabet[(v >> 18) & 0x3f];
}
#endif
static void
base64_uint32 (uint32_t v, char *c)
{
c[0] = base64_alphabet[(v >> 0) & 0x3f];
c[1] = base64_alphabet[(v >> 6) & 0x3f];
c[2] = base64_alphabet[(v >> 12) & 0x3f];
c[3] = base64_alphabet[(v >> 18) & 0x3f];
c[4] = base64_alphabet[(v >> 24) & 0x3f];
c[5] = base64_alphabet[(v >> 30) & 0x2];
}
/************************************************************************
* conversion of raw image data to uncompressed png data: uris *
************************************************************************/
/* Table of CRCs of all 8-bit messages. */
static unsigned long crc_table[256];
/* Flag: has the table been computed? Initially false. */
static int crc_table_computed = 0;
/* Make the table for a fast CRC. */
static void
make_crc_table(void)
{
unsigned long c;
int n, k;
for (n = 0; n < 256; n++) {
c = (unsigned long) n;
for (k = 0; k < 8; k++) {
if (c & 1)
c = 0xedb88320L ^ (c >> 1);
else
c = c >> 1;
}
crc_table[n] = c;
}
crc_table_computed = 1;
}
static unsigned long
update_crc(unsigned long crc, unsigned char *buf, int len)
{
unsigned long c = crc;
int n;
if (!crc_table_computed)
make_crc_table();
for (n = 0; n < len; n++) {
c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8);
}
return c;
}
static unsigned long
crc(unsigned char *buf, int len)
{
return update_crc(0xffffffffL, buf, len) ^ 0xffffffffL;
}
#define BASE 65521 /* largest prime smaller than 65536 */
static unsigned long
update_adler32(unsigned long adler, unsigned char *buf, int len)
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int n;
for (n = 0; n < len; n++) {
s1 = (s1 + buf[n]) % BASE;
s2 = (s2 + s1) % BASE;
}
return (s2 << 16) + s1;
}
static char *
to_png_rgb (int w, int h, int byte_stride, uint32_t *data)
{
uchar header[] = {137, 80, 78, 71, 13, 10, 26, 10};
uchar ihdr[13+12] = {0, 0, 0, 13, 'I', 'H', 'D', 'R',
/* w: */ 0, 0, 0, 0, /* h: */ 0,0,0,0,
/* bpp: */ 8, /* color type: */ 2,
0, 0, 0};
uchar idat_start[8] = { /* len: */0, 0, 0, 0, 'I', 'D', 'A', 'T' };
uchar iend[12] = {0, 0, 0, 0, 'I', 'E', 'N', 'D', 0xae, 0x42, 0x60, 0x82};
size_t data_size, row_size;
char row_header[6];
uint8_t *png, *p, *p_row, *p_idat;
uint32_t *row;
unsigned long adler;
uint32_t pixel;
size_t png_size;
int x, y;
char *url, *url_base64;
int state = 0, outlen;
int save = 0;
*(uint32_t *)&ihdr[8] = htonl(w);
*(uint32_t *)&ihdr[12] = htonl(h);
*(uint32_t *)&ihdr[21] = htonl(crc(&ihdr[4], 13 + 4));
row_size = 1 + w * 3;
row_header[0] = 0;
row_header[1] = row_size & 0xff;
row_header[2] = (row_size >> 8) & 0xff;
row_header[3] = ~row_header[1];
row_header[4] = ~row_header[2];
row_header[5] = 0;
data_size = 2 + (6 + w * 3) * h + 4;
*(uint32_t *)&idat_start[0] = htonl(data_size);
png_size = sizeof(header) + sizeof(ihdr) + 12 + data_size + sizeof(iend);
png = bw_malloc (png_size);
p = png;
memcpy (p, header, sizeof(header));
p += sizeof(header);
memcpy (p, ihdr, sizeof(ihdr));
p += sizeof(ihdr);
memcpy (p, idat_start, sizeof(idat_start));
p += sizeof(idat_start);
/* IDAT data:
zlib header: 0x78, 0x01 ,
h * scanline: row_header[] + width * r,g,b
checksum: adler32
*/
p_idat = p - 4;
/* zlib header */
*p++ = 0x78;
*p++ = 0x01;
adler = 1;
/* scanline data */
for (y = 0; y < h; y++) {
if (y == h - 1)
row_header[0] = 1; /* final block */
memcpy (p, row_header, sizeof(row_header));
p += sizeof(row_header);
p_row = p - 1;
row = data;
data += byte_stride / 4;
for (x = 0; x < w; x++) {
pixel = *row++;
*p++ = (pixel >> 16) & 0xff; /* red */
*p++ = (pixel >> 8) & 0xff; /* green */
*p++ = (pixel >> 0) & 0xff; /* blue */
}
adler = update_adler32(adler, p_row, p - p_row);
}
/* adler32 */
*(uint32_t *)p = htonl(adler);
p += 4;
*(uint32_t *)p = htonl(crc(p_idat, p - p_idat));
p += 4;
memcpy (p, iend, sizeof(iend));
p += sizeof(iend);
assert(p - png == png_size);
url = bw_malloc (strlen("data:image/png;base64,") +
((png_size / 3 + 1) * 4 + 4) + 1);
strcpy (url, "data:image/png;base64,");
url_base64 = url + strlen("data:image/png;base64,");
outlen = bw_base64_encode_step (png, png_size, FALSE, url_base64, &state, &save);
outlen += bw_base64_encode_close (FALSE, url_base64 + outlen, &state, &save);
url_base64[outlen] = 0;
free (png);
return url;
}
static char *
to_png_rgba (int w, int h, int byte_stride, uint32_t *data)
{
uchar header[] = {137, 80, 78, 71, 13, 10, 26, 10};
uchar ihdr[13+12] = {0, 0, 0, 13, 'I', 'H', 'D', 'R',
/* w: */ 0, 0, 0, 0, /* h: */ 0,0,0,0,
/* bpp: */ 8, /* color type: */ 6,
0, 0, 0};
uchar idat_start[8] = { /* len: */0, 0, 0, 0, 'I', 'D', 'A', 'T' };
uchar iend[12] = {0, 0, 0, 0, 'I', 'E', 'N', 'D', 0xae, 0x42, 0x60, 0x82};
size_t data_size, row_size;
char row_header[6];
uint8_t *png, *p, *p_row, *p_idat;
uint32_t *row;
unsigned long adler;
uint32_t pixel;
size_t png_size;
int x, y;
char *url, *url_base64;
int state = 0, outlen;
int save = 0;
*(uint32_t *)&ihdr[8] = htonl(w);
*(uint32_t *)&ihdr[12] = htonl(h);
*(uint32_t *)&ihdr[21] = htonl(crc(&ihdr[4], 13 + 4));
row_size = 1 + w * 4;
row_header[0] = 0;
row_header[1] = row_size & 0xff;
row_header[2] = (row_size >> 8) & 0xff;
row_header[3] = ~row_header[1];
row_header[4] = ~row_header[2];
row_header[5] = 0;
data_size = 2 + (6 + w * 4) * h + 4;
*(uint32_t *)&idat_start[0] = htonl(data_size);
png_size = sizeof(header) + sizeof(ihdr) + 12 + data_size + sizeof(iend);
png = bw_malloc (png_size);
p = png;
memcpy (p, header, sizeof(header));
p += sizeof(header);
memcpy (p, ihdr, sizeof(ihdr));
p += sizeof(ihdr);
memcpy (p, idat_start, sizeof(idat_start));
p += sizeof(idat_start);
/* IDAT data:
zlib header: 0x78, 0x01 ,
h * scanline: row_header[] + width * r,g,b,a
checksum: adler32
*/
p_idat = p - 4;
/* zlib header */
*p++ = 0x78;
*p++ = 0x01;
adler = 1;
/* scanline data */
for (y = 0; y < h; y++) {
if (y == h - 1)
row_header[0] = 1; /* final block */
memcpy (p, row_header, sizeof(row_header));
p += sizeof(row_header);
p_row = p - 1;
row = data;
data += byte_stride / 4;
for (x = 0; x < w; x++) {
pixel = *row++;
*p++ = (pixel >> 16) & 0xff; /* red */
*p++ = (pixel >> 8) & 0xff; /* green */
*p++ = (pixel >> 0) & 0xff; /* blue */
*p++ = (pixel >> 24) & 0xff; /* alpha */
}
adler = update_adler32(adler, p_row, p - p_row);
}
/* adler32 */
*(uint32_t *)p = htonl(adler);
p += 4;
*(uint32_t *)p = htonl(crc(p_idat, p - p_idat));
p += 4;
memcpy (p, iend, sizeof(iend));
p += sizeof(iend);
assert(p - png == png_size);
url = bw_malloc (strlen("data:image/png;base64,") +
((png_size / 3 + 1) * 4 + 4) + 1);
strcpy (url, "data:image/png;base64,");
url_base64 = url + strlen("data:image/png;base64,");
outlen = bw_base64_encode_step (png, png_size, FALSE, url_base64, &state, &save);
outlen += bw_base64_encode_close (FALSE, url_base64 + outlen, &state, &save);
url_base64[outlen] = 0;
free (png);
return url;
}
#if 0
static char *
to_png_a (int w, int h, int byte_stride, uint8_t *data)
{
uchar header[] = {137, 80, 78, 71, 13, 10, 26, 10};
uchar ihdr[13+12] = {0, 0, 0, 13, 'I', 'H', 'D', 'R',
/* w: */ 0, 0, 0, 0, /* h: */ 0,0,0,0,
/* bpp: */ 8, /* color type: */ 4,
0, 0, 0};
uchar idat_start[8] = { /* len: */0, 0, 0, 0, 'I', 'D', 'A', 'T' };
uchar iend[12] = {0, 0, 0, 0, 'I', 'E', 'N', 'D', 0xae, 0x42, 0x60, 0x82};
size_t data_size, row_size;
char row_header[6];
uint8_t *png, *p, *p_row, *p_idat;
uint8_t *row;
unsigned long adler;
uint32_t pixel;
size_t png_size;
int x, y;
char *url, *url_base64;
int state = 0, outlen;
int save = 0;
*(uint32_t *)&ihdr[8] = htonl(w);
*(uint32_t *)&ihdr[12] = htonl(h);
*(uint32_t *)&ihdr[21] = htonl(crc(&ihdr[4], 13 + 4));
row_size = 1 + w * 2;
row_header[0] = 0;
row_header[1] = row_size & 0xff;
row_header[2] = (row_size >> 8) & 0xff;
row_header[3] = ~row_header[1];
row_header[4] = ~row_header[2];
row_header[5] = 0;
data_size = 2 + (6 + w * 2) * h + 4;
*(uint32_t *)&idat_start[0] = htonl(data_size);
png_size = sizeof(header) + sizeof(ihdr) + 12 + data_size + sizeof(iend);
png = bw_malloc (png_size);
p = png;
memcpy (p, header, sizeof(header));
p += sizeof(header);
memcpy (p, ihdr, sizeof(ihdr));
p += sizeof(ihdr);
memcpy (p, idat_start, sizeof(idat_start));
p += sizeof(idat_start);
/* IDAT data:
zlib header: 0x78, 0x01 ,
h * scanline: row_header[] + width * r,g,b,a
checksum: adler32
*/
p_idat = p - 4;
/* zlib header */
*p++ = 0x78;
*p++ = 0x01;
adler = 1;
/* scanline data */
for (y = 0; y < h; y++) {
if (y == h - 1)
row_header[0] = 1; /* final block */
memcpy (p, row_header, sizeof(row_header));
p += sizeof(row_header);
p_row = p - 1;
row = data;
data += byte_stride / 4;
for (x = 0; x < w; x++) {
pixel = *row++;
*p++ = 0x00; /* gray */
*p++ = pixel; /* alpha */
}
adler = update_adler32(adler, p_row, p - p_row);
}
/* adler32 */
*(uint32_t *)p = htonl(adler);
p += 4;
*(uint32_t *)p = htonl(crc(p_idat, p - p_idat));
p += 4;
memcpy (p, iend, sizeof(iend));
p += sizeof(iend);
assert(p - png == png_size);
url = bw_malloc (strlen("data:image/png;base64,") +
((png_size / 3 + 1) * 4 + 4) + 1);
strcpy (url, "data:image/png;base64,");
url_base64 = url + strlen("data:image/png;base64,");
outlen = bw_base64_encode_step (png, png_size, FALSE, url_base64, &state, &save);
outlen += bw_base64_encode_close (FALSE, url_base64 + outlen, &state, &save);
url_base64[outlen] = 0;
free (png);
return url;
}
#endif
/************************************************************************
* Basic I/O primitives *
************************************************************************/
struct BroadwayClient {
int fd;
gzFile *zfd;
} ;
static void
broadway_client_write_raw (BroadwayClient *client,
const void *buf, size_t count)
{
ssize_t res;
int errsave;
const char *ptr = (const char *)buf;
while (count > 0)
{
res = write(client->fd, ptr, count);
if (res == -1)
{
errsave = errno;
if (errsave == EINTR)
continue;
fprintf(stderr, "Error on write_raw to client %d\n", errsave);
exit(1);
}
if (res == 0)
{
fprintf(stderr, "Short write_raw to client\n");
exit(1);
}
count -= res;
ptr += res;
}
}
static void
broadway_client_write (BroadwayClient *client,
const void *buf, size_t count)
{
ssize_t res;
const char *ptr = (const char *)buf;
while (count > 0)
{
res = gzwrite(client->zfd, ptr, count);
if (res == -1)
{
fprintf(stderr, "Error on write to client\n");
exit(1);
}
if (res == 0)
{
fprintf(stderr, "Short write to client\n");
exit(1);
}
count -= res;
ptr += res;
}
}
static void
broadway_client_write_header (BroadwayClient *client)
{
char *header;
header =
Don't put output on stdin, instead do it on http connection
2010-11-18 21:21:16 +00:00
"HTTP/1.1 200 OK\r\n"
[broadway] Import broadway lib We put this in gtk+ for now since it will be synced initially, but it avoids using glib so that it can be used lower in the stack if required (e.g. in cairo later).
2010-11-16 11:42:53 +00:00
"Content-type: multipart/x-mixed-replace;boundary=x\r\n"
"Content-Encoding: gzip\r\n"
"\r\n";
broadway_client_write_raw (client,
header, strlen (header));
}
static void
send_boundary (BroadwayClient *client)
{
char *boundary =
"--x\r\n"
"\r\n";
broadway_client_write (client, boundary, strlen (boundary));
}
BroadwayClient *
broadway_client_new(int fd)
{
BroadwayClient *client;
client = bw_new0 (BroadwayClient, 1);
client->fd = fd;
broadway_client_write_header (client);
client->zfd = gzdopen(fd, "wb");
/* Need an initial multipart boundary */
send_boundary (client);
return client;
}
void
broadway_client_flush (BroadwayClient *client)
{
send_boundary (client);
gzflush (client->zfd, Z_SYNC_FLUSH);
}
/************************************************************************
* Core rendering operations *
************************************************************************/
void
broadway_client_copy_rectangles (BroadwayClient *client, int id,
BroadwayRect *rects, int n_rects,
int dx, int dy)
{
char *buf;
int len, i, p;
len = 1 + 3 + 3 + 3*4*n_rects + 3 + 3;
buf = bw_malloc (len);
p = 0;
buf[p++] = 'b';
base64_uint16(id, &buf[p]); p +=3;
base64_uint16(n_rects, &buf[p]); p +=3;
for (i = 0; i < n_rects; i++)
{
base64_uint16(rects[i].x, &buf[p]); p +=3;
base64_uint16(rects[i].y, &buf[p]); p +=3;
base64_uint16(rects[i].width, &buf[p]); p +=3;
base64_uint16(rects[i].height, &buf[p]); p +=3;
}
base64_uint16(dx, &buf[p]); p +=3;
base64_uint16(dy, &buf[p]); p +=3;
broadway_client_write (client, buf, len);
free (buf);
}
void
broadway_client_new_surface(BroadwayClient *client, int id, int x, int y, int w, int h)
{
char buf[16];
buf[0] = 's';
base64_uint16(id, &buf[1]);
base64_uint16(x, &buf[4]);
base64_uint16(y, &buf[7]);
base64_uint16(w, &buf[10]);
base64_uint16(h, &buf[13]);
broadway_client_write (client, buf, 16);
}
void
broadway_client_show_surface(BroadwayClient *client, int id)
{
char buf[4];
buf[0] = 'S';
base64_uint16(id, &buf[1]);
broadway_client_write (client, buf, 4);
}
void
broadway_client_hide_surface(BroadwayClient *client, int id)
{
char buf[4];
buf[0] = 'H';
base64_uint16(id, &buf[1]);
broadway_client_write (client, buf, 4);
}
void
broadway_client_destroy_surface(BroadwayClient *client, int id)
{
char buf[4];
buf[0] = 'd';
base64_uint16(id, &buf[1]);
broadway_client_write (client, buf, 4);
}
void
broadway_client_move_surface(BroadwayClient *client, int id, int x, int y)
{
char buf[10];
buf[0] = 'm';
base64_uint16(id, &buf[1]);
base64_uint16(x, &buf[4]);
base64_uint16(y, &buf[7]);
broadway_client_write (client, buf, 10);
}
void
broadway_client_put_rgb (BroadwayClient *client, int id, int x, int y,
int w, int h, int byte_stride, void *data)
{
char buf[16];
size_t len;
char *url;
buf[0] = 'i';
base64_uint16(id, &buf[1]);
base64_uint16(x, &buf[4]);
base64_uint16(y, &buf[7]);
url = to_png_rgb (w, h, byte_stride, (uint32_t*)data);
len = strlen (url);
base64_uint32(len, &buf[10]);
broadway_client_write (client, buf, 16);
broadway_client_write (client, url, len);
free (url);
}
static void
rgb_autocrop (unsigned char *data,
int byte_stride,
int *x_arg, int *y_arg,
int *w_arg, int *h_arg)
{
unsigned char *line;
int w, h;
int x, y, xx, yy;
boolean non_zero;
x = *x_arg;
y = *y_arg;
w = *w_arg;
h = *h_arg;
while (h > 0)
{
line = data + y * byte_stride + x * 4;
non_zero = FALSE;
for (xx = 0; xx < w; xx++)
{
if (line[1] != 0 || line[2] != 0 || line[3] != 0) {
non_zero = TRUE;
break;
}
line += 4;
}
if (non_zero)
break;
y++;
h--;
}
while (h > 0)
{
line = data + (y + h - 1) * byte_stride + x * 4;
non_zero = FALSE;
for (xx = 0; xx < w; xx++)
{
if (line[1] != 0 || line[2] != 0 || line[3] != 0) {
non_zero = TRUE;
break;
}
line += 4;
}
if (non_zero)
break;
h--;
}
while (w > 0)
{
line = data + y * byte_stride + x * 4;
non_zero = FALSE;
for (yy = 0; yy < h; yy++)
{
if (line[1] != 0 || line[2] != 0 || line[3] != 0) {
non_zero = TRUE;
break;
}
line += byte_stride;
}
if (non_zero)
break;
x++;
w--;
}
while (w > 0)
{
line = data + y * byte_stride + (x + w - 1) * 4;
non_zero = FALSE;
for (yy = 0; yy < h; yy++)
{
if (line[1] != 0 || line[2] != 0 || line[3] != 0) {
non_zero = TRUE;
break;
}
line += byte_stride;
}
if (non_zero)
break;
w--;
}
*x_arg = x;
*y_arg = y;
*w_arg = w;
*h_arg = h;
}
void
broadway_client_put_delta_rgb (BroadwayClient *client, int id, int dest_x, int dest_y,
int w, int h, int byte_stride, void *data)
{
char buf[16];
size_t len;
char *url;
int src_x, src_y;
src_x = 0;
src_y = 0;
rgb_autocrop (data,
byte_stride,
&src_x, &src_y, &w, &h);
data = (uint8_t *)data + src_x * 4 + src_y * byte_stride;
buf[0] = 'D';
base64_uint16(id, &buf[1]);
base64_uint16(dest_x + src_x, &buf[4]);
base64_uint16(dest_y + src_y, &buf[7]);
url = to_png_rgb (w, h, byte_stride, (uint32_t*)data);
len = strlen (url);
base64_uint32(len, &buf[10]);
broadway_client_write (client, buf, 16);
broadway_client_write (client, url, len);
free (url);
}
void
broadway_client_put_rgba (BroadwayClient *client, int id, int x, int y,
int w, int h, int byte_stride, void *data)
{
char buf[16];
size_t len;
char *url;
buf[0] = 'i';
base64_uint16(id, &buf[1]);
base64_uint16(x, &buf[4]);
base64_uint16(y, &buf[7]);
url = to_png_rgba (w, h, byte_stride, (uint32_t*)data);
len = strlen (url);
base64_uint32(len, &buf[10]);
broadway_client_write (client, buf, 16);
broadway_client_write (client, url, len);
free (url);
}
#if 0
static void
send_image_a (BroadwayClient *client, int id, int x, int y,
int w, int h, int byte_stride, uint8_t *data)
{
char buf[16];
size_t len;
char *url;
buf[0] = 'i';
base64_uint16(id, &buf[1]);
base64_uint16(x, &buf[4]);
base64_uint16(y, &buf[7]);
url = to_png_a (w, h, byte_stride, data);
len = strlen (url);
base64_uint32(len, &buf[10]);
broadway_client_write (client, buf, 16);
broadway_client_write (client, url, len);
free (url);
}
#endif
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