mirror of
https://github.com/qemu/qemu.git
synced 2024-12-15 23:43:31 +08:00
e16f4c8770
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-2-git-send-email-peter.maydell@linaro.org
264 lines
7.0 KiB
C
264 lines
7.0 KiB
C
/*
|
|
* QEMU VNC display driver: Zlib Run-length Encoding (ZRLE)
|
|
*
|
|
* From libvncserver/libvncserver/zrleencodetemplate.c
|
|
* Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
|
|
* Copyright (C) 2003 Sun Microsystems, Inc.
|
|
*
|
|
* Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
/*
|
|
* Before including this file, you must define a number of CPP macros.
|
|
*
|
|
* ZRLE_BPP should be 8, 16 or 32 depending on the bits per pixel.
|
|
*
|
|
* Note that the buf argument to ZRLE_ENCODE needs to be at least one pixel
|
|
* bigger than the largest tile of pixel data, since the ZRLE encoding
|
|
* algorithm writes to the position one past the end of the pixel data.
|
|
*/
|
|
|
|
|
|
#include "qemu/osdep.h"
|
|
|
|
#undef ZRLE_ENDIAN_SUFFIX
|
|
|
|
#if ZYWRLE_ENDIAN == ENDIAN_LITTLE
|
|
#define ZRLE_ENDIAN_SUFFIX le
|
|
#elif ZYWRLE_ENDIAN == ENDIAN_BIG
|
|
#define ZRLE_ENDIAN_SUFFIX be
|
|
#else
|
|
#define ZRLE_ENDIAN_SUFFIX ne
|
|
#endif
|
|
|
|
#ifndef ZRLE_CONCAT
|
|
#define ZRLE_CONCAT_I(a, b) a##b
|
|
#define ZRLE_CONCAT2(a, b) ZRLE_CONCAT_I(a, b)
|
|
#define ZRLE_CONCAT3(a, b, c) ZRLE_CONCAT2(a, ZRLE_CONCAT2(b, c))
|
|
#endif
|
|
|
|
#ifdef ZRLE_COMPACT_PIXEL
|
|
#define ZRLE_ENCODE_SUFFIX ZRLE_CONCAT2(ZRLE_COMPACT_PIXEL,ZRLE_ENDIAN_SUFFIX)
|
|
#define ZRLE_WRITE_SUFFIX ZRLE_COMPACT_PIXEL
|
|
#define ZRLE_PIXEL ZRLE_CONCAT3(uint,ZRLE_BPP,_t)
|
|
#define ZRLE_BPP_OUT 24
|
|
#elif ZRLE_BPP == 15
|
|
#define ZRLE_ENCODE_SUFFIX ZRLE_CONCAT2(ZRLE_BPP,ZRLE_ENDIAN_SUFFIX)
|
|
#define ZRLE_WRITE_SUFFIX 16
|
|
#define ZRLE_PIXEL uint16_t
|
|
#define ZRLE_BPP_OUT 16
|
|
#else
|
|
#define ZRLE_ENCODE_SUFFIX ZRLE_CONCAT2(ZRLE_BPP,ZRLE_ENDIAN_SUFFIX)
|
|
#define ZRLE_WRITE_SUFFIX ZRLE_BPP
|
|
#define ZRLE_BPP_OUT ZRLE_BPP
|
|
#define ZRLE_PIXEL ZRLE_CONCAT3(uint,ZRLE_BPP,_t)
|
|
#endif
|
|
|
|
#define ZRLE_WRITE_PIXEL ZRLE_CONCAT2(zrle_write_u, ZRLE_WRITE_SUFFIX)
|
|
#define ZRLE_ENCODE ZRLE_CONCAT2(zrle_encode_, ZRLE_ENCODE_SUFFIX)
|
|
#define ZRLE_ENCODE_TILE ZRLE_CONCAT2(zrle_encode_tile, ZRLE_ENCODE_SUFFIX)
|
|
#define ZRLE_WRITE_PALETTE ZRLE_CONCAT2(zrle_write_palette,ZRLE_ENCODE_SUFFIX)
|
|
|
|
static void ZRLE_ENCODE_TILE(VncState *vs, ZRLE_PIXEL *data, int w, int h,
|
|
int zywrle_level);
|
|
|
|
#if ZRLE_BPP != 8
|
|
#include "vnc-enc-zywrle-template.c"
|
|
#endif
|
|
|
|
|
|
static void ZRLE_ENCODE(VncState *vs, int x, int y, int w, int h,
|
|
int zywrle_level)
|
|
{
|
|
int ty;
|
|
|
|
for (ty = y; ty < y + h; ty += VNC_ZRLE_TILE_HEIGHT) {
|
|
|
|
int tx, th;
|
|
|
|
th = MIN(VNC_ZRLE_TILE_HEIGHT, y + h - ty);
|
|
|
|
for (tx = x; tx < x + w; tx += VNC_ZRLE_TILE_WIDTH) {
|
|
int tw;
|
|
ZRLE_PIXEL *buf;
|
|
|
|
tw = MIN(VNC_ZRLE_TILE_WIDTH, x + w - tx);
|
|
|
|
buf = zrle_convert_fb(vs, tx, ty, tw, th, ZRLE_BPP);
|
|
ZRLE_ENCODE_TILE(vs, buf, tw, th, zywrle_level);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ZRLE_ENCODE_TILE(VncState *vs, ZRLE_PIXEL *data, int w, int h,
|
|
int zywrle_level)
|
|
{
|
|
VncPalette *palette = &vs->zrle.palette;
|
|
|
|
int runs = 0;
|
|
int single_pixels = 0;
|
|
|
|
bool use_rle;
|
|
bool use_palette;
|
|
|
|
int i;
|
|
|
|
ZRLE_PIXEL *ptr = data;
|
|
ZRLE_PIXEL *end = ptr + h * w;
|
|
*end = ~*(end-1); /* one past the end is different so the while loop ends */
|
|
|
|
/* Real limit is 127 but we wan't a way to know if there is more than 127 */
|
|
palette_init(palette, 256, ZRLE_BPP);
|
|
|
|
while (ptr < end) {
|
|
ZRLE_PIXEL pix = *ptr;
|
|
if (*++ptr != pix) { /* FIXME */
|
|
single_pixels++;
|
|
} else {
|
|
while (*++ptr == pix) ;
|
|
runs++;
|
|
}
|
|
palette_put(palette, pix);
|
|
}
|
|
|
|
/* Solid tile is a special case */
|
|
|
|
if (palette_size(palette) == 1) {
|
|
bool found;
|
|
|
|
vnc_write_u8(vs, 1);
|
|
ZRLE_WRITE_PIXEL(vs, palette_color(palette, 0, &found));
|
|
return;
|
|
}
|
|
|
|
zrle_choose_palette_rle(vs, w, h, palette, ZRLE_BPP_OUT,
|
|
runs, single_pixels, zywrle_level,
|
|
&use_rle, &use_palette);
|
|
|
|
if (!use_palette) {
|
|
vnc_write_u8(vs, (use_rle ? 128 : 0));
|
|
} else {
|
|
uint32_t colors[VNC_PALETTE_MAX_SIZE];
|
|
size_t size = palette_size(palette);
|
|
|
|
vnc_write_u8(vs, (use_rle ? 128 : 0) | size);
|
|
palette_fill(palette, colors);
|
|
|
|
for (i = 0; i < size; i++) {
|
|
ZRLE_WRITE_PIXEL(vs, colors[i]);
|
|
}
|
|
}
|
|
|
|
if (use_rle) {
|
|
ZRLE_PIXEL *ptr = data;
|
|
ZRLE_PIXEL *end = ptr + w * h;
|
|
ZRLE_PIXEL *run_start;
|
|
ZRLE_PIXEL pix;
|
|
|
|
while (ptr < end) {
|
|
int len;
|
|
int index = 0;
|
|
|
|
run_start = ptr;
|
|
pix = *ptr++;
|
|
|
|
while (*ptr == pix && ptr < end) {
|
|
ptr++;
|
|
}
|
|
|
|
len = ptr - run_start;
|
|
|
|
if (use_palette)
|
|
index = palette_idx(palette, pix);
|
|
|
|
if (len <= 2 && use_palette) {
|
|
if (len == 2) {
|
|
vnc_write_u8(vs, index);
|
|
}
|
|
vnc_write_u8(vs, index);
|
|
continue;
|
|
}
|
|
if (use_palette) {
|
|
vnc_write_u8(vs, index | 128);
|
|
} else {
|
|
ZRLE_WRITE_PIXEL(vs, pix);
|
|
}
|
|
|
|
len -= 1;
|
|
|
|
while (len >= 255) {
|
|
vnc_write_u8(vs, 255);
|
|
len -= 255;
|
|
}
|
|
|
|
vnc_write_u8(vs, len);
|
|
}
|
|
} else if (use_palette) { /* no RLE */
|
|
int bppp;
|
|
ZRLE_PIXEL *ptr = data;
|
|
|
|
/* packed pixels */
|
|
|
|
assert (palette_size(palette) < 17);
|
|
|
|
bppp = bits_per_packed_pixel[palette_size(palette)-1];
|
|
|
|
for (i = 0; i < h; i++) {
|
|
uint8_t nbits = 0;
|
|
uint8_t byte = 0;
|
|
|
|
ZRLE_PIXEL *eol = ptr + w;
|
|
|
|
while (ptr < eol) {
|
|
ZRLE_PIXEL pix = *ptr++;
|
|
uint8_t index = palette_idx(palette, pix);
|
|
|
|
byte = (byte << bppp) | index;
|
|
nbits += bppp;
|
|
if (nbits >= 8) {
|
|
vnc_write_u8(vs, byte);
|
|
nbits = 0;
|
|
}
|
|
}
|
|
if (nbits > 0) {
|
|
byte <<= 8 - nbits;
|
|
vnc_write_u8(vs, byte);
|
|
}
|
|
}
|
|
} else {
|
|
|
|
/* raw */
|
|
|
|
#if ZRLE_BPP != 8
|
|
if (zywrle_level > 0 && !(zywrle_level & 0x80)) {
|
|
ZYWRLE_ANALYZE(data, data, w, h, w, zywrle_level, vs->zywrle.buf);
|
|
ZRLE_ENCODE_TILE(vs, data, w, h, zywrle_level | 0x80);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
#ifdef ZRLE_COMPACT_PIXEL
|
|
ZRLE_PIXEL *ptr;
|
|
|
|
for (ptr = data; ptr < data + w * h; ptr++) {
|
|
ZRLE_WRITE_PIXEL(vs, *ptr);
|
|
}
|
|
#else
|
|
vnc_write(vs, data, w * h * (ZRLE_BPP / 8));
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
#undef ZRLE_PIXEL
|
|
#undef ZRLE_WRITE_PIXEL
|
|
#undef ZRLE_ENCODE
|
|
#undef ZRLE_ENCODE_TILE
|
|
#undef ZYWRLE_ENCODE_TILE
|
|
#undef ZRLE_BPP_OUT
|
|
#undef ZRLE_WRITE_SUFFIX
|
|
#undef ZRLE_ENCODE_SUFFIX
|