[mirror_qemu.git] / ui / vnc-enc-zrle.c

/*
 * QEMU VNC display driver: Zlib Run-length Encoding (ZRLE)
 *
 * From libvncserver/libvncserver/zrle.c
 * Copyright (C) 2002 RealVNC Ltd.  All Rights Reserved.
 * Copyright (C) 2003 Sun Microsystems, Inc.
 *
 * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
 *
 * 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 "qemu/osdep.h"
#include "vnc.h"
#include "vnc-enc-zrle.h"

static const int bits_per_packed_pixel[] = {
  0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
};


static void vnc_zrle_start(VncState *vs)
{
    buffer_reset(&vs->zrle.zrle);

    /* make the output buffer be the zlib buffer, so we can compress it later */
    vs->zrle.tmp = vs->output;
    vs->output = vs->zrle.zrle;
}

static void vnc_zrle_stop(VncState *vs)
{
    /* switch back to normal output/zlib buffers */
    vs->zrle.zrle = vs->output;
    vs->output = vs->zrle.tmp;
}

static void *zrle_convert_fb(VncState *vs, int x, int y, int w, int h,
                             int bpp)
{
    Buffer tmp;

    buffer_reset(&vs->zrle.fb);
    buffer_reserve(&vs->zrle.fb, w * h * bpp + bpp);

    tmp = vs->output;
    vs->output = vs->zrle.fb;

    vnc_raw_send_framebuffer_update(vs, x, y, w, h);

    vs->zrle.fb = vs->output;
    vs->output = tmp;
    return vs->zrle.fb.buffer;
}

static int zrle_compress_data(VncState *vs, int level)
{
    z_streamp zstream = &vs->zrle.stream;

    buffer_reset(&vs->zrle.zlib);

    if (zstream->opaque != vs) {
        int err;

        zstream->zalloc = vnc_zlib_zalloc;
        zstream->zfree = vnc_zlib_zfree;

        err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
                           MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);

        if (err != Z_OK) {
            fprintf(stderr, "VNC: error initializing zlib\n");
            return -1;
        }

        zstream->opaque = vs;
    }

    /* reserve memory in output buffer */
    buffer_reserve(&vs->zrle.zlib, vs->zrle.zrle.offset + 64);

    /* set pointers */
    zstream->next_in = vs->zrle.zrle.buffer;
    zstream->avail_in = vs->zrle.zrle.offset;
    zstream->next_out = vs->zrle.zlib.buffer + vs->zrle.zlib.offset;
    zstream->avail_out = vs->zrle.zlib.capacity - vs->zrle.zlib.offset;
    zstream->data_type = Z_BINARY;

    /* start encoding */
    if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
        fprintf(stderr, "VNC: error during zrle compression\n");
        return -1;
    }

    vs->zrle.zlib.offset = vs->zrle.zlib.capacity - zstream->avail_out;
    return vs->zrle.zlib.offset;
}

/* Try to work out whether to use RLE and/or a palette.  We do this by
 * estimating the number of bytes which will be generated and picking the
 * method which results in the fewest bytes.  Of course this may not result
 * in the fewest bytes after compression... */
static void zrle_choose_palette_rle(VncState *vs, int w, int h,
                                    VncPalette *palette, int bpp_out,
                                    int runs, int single_pixels,
                                    int zywrle_level,
                                    bool *use_rle, bool *use_palette)
{
    size_t estimated_bytes;
    size_t plain_rle_bytes;

    *use_palette = *use_rle = false;

    estimated_bytes = w * h * (bpp_out / 8); /* start assuming raw */

    if (bpp_out != 8) {
        if (zywrle_level > 0 && !(zywrle_level & 0x80))
            estimated_bytes >>= zywrle_level;
    }

    plain_rle_bytes = ((bpp_out / 8) + 1) * (runs + single_pixels);

    if (plain_rle_bytes < estimated_bytes) {
        *use_rle = true;
        estimated_bytes = plain_rle_bytes;
    }

    if (palette_size(palette) < 128) {
        int palette_rle_bytes;

        palette_rle_bytes = (bpp_out / 8) * palette_size(palette);
        palette_rle_bytes += 2 * runs + single_pixels;

        if (palette_rle_bytes < estimated_bytes) {
            *use_rle = true;
            *use_palette = true;
            estimated_bytes = palette_rle_bytes;
        }

        if (palette_size(palette) < 17) {
            int packed_bytes;

            packed_bytes = (bpp_out / 8) * palette_size(palette);
            packed_bytes += w * h *
                bits_per_packed_pixel[palette_size(palette)-1] / 8;

            if (packed_bytes < estimated_bytes) {
                *use_rle = false;
                *use_palette = true;
                estimated_bytes = packed_bytes;
            }
        }
    }
}

static void zrle_write_u32(VncState *vs, uint32_t value)
{
    vnc_write(vs, (uint8_t *)&value, 4);
}

static void zrle_write_u24a(VncState *vs, uint32_t value)
{
    vnc_write(vs, (uint8_t *)&value, 3);
}

static void zrle_write_u24b(VncState *vs, uint32_t value)
{
    vnc_write(vs, ((uint8_t *)&value) + 1, 3);
}

static void zrle_write_u16(VncState *vs, uint16_t value)
{
    vnc_write(vs, (uint8_t *)&value, 2);
}

static void zrle_write_u8(VncState *vs, uint8_t value)
{
    vnc_write_u8(vs, value);
}

#define ENDIAN_LITTLE 0
#define ENDIAN_BIG    1
#define ENDIAN_NO     2

#define ZRLE_BPP 8
#define ZYWRLE_ENDIAN ENDIAN_NO
#include "vnc-enc-zrle-template.c"
#undef ZRLE_BPP

#define ZRLE_BPP 15
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include "vnc-enc-zrle-template.c"

#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include "vnc-enc-zrle-template.c"

#undef ZRLE_BPP
#define ZRLE_BPP 16
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include "vnc-enc-zrle-template.c"

#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include "vnc-enc-zrle-template.c"

#undef ZRLE_BPP
#define ZRLE_BPP 32
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include "vnc-enc-zrle-template.c"

#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include "vnc-enc-zrle-template.c"

#define ZRLE_COMPACT_PIXEL 24a
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include "vnc-enc-zrle-template.c"

#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include "vnc-enc-zrle-template.c"

#undef ZRLE_COMPACT_PIXEL
#define ZRLE_COMPACT_PIXEL 24b
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include "vnc-enc-zrle-template.c"

#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include "vnc-enc-zrle-template.c"
#undef ZRLE_COMPACT_PIXEL
#undef ZRLE_BPP

static int zrle_send_framebuffer_update(VncState *vs, int x, int y,
                                        int w, int h)
{
    bool be = vs->client_be;
    size_t bytes;
    int zywrle_level;

    if (vs->zrle.type == VNC_ENCODING_ZYWRLE) {
        if (!vs->vd->lossy || vs->tight.quality == (uint8_t)-1
            || vs->tight.quality == 9) {
            zywrle_level = 0;
            vs->zrle.type = VNC_ENCODING_ZRLE;
        } else if (vs->tight.quality < 3) {
            zywrle_level = 3;
        } else if (vs->tight.quality < 6) {
            zywrle_level = 2;
        } else {
            zywrle_level = 1;
        }
    } else {
        zywrle_level = 0;
    }

    vnc_zrle_start(vs);

    switch (vs->client_pf.bytes_per_pixel) {
    case 1:
        zrle_encode_8ne(vs, x, y, w, h, zywrle_level);
        break;

    case 2:
        if (vs->client_pf.gmax > 0x1F) {
            if (be) {
                zrle_encode_16be(vs, x, y, w, h, zywrle_level);
            } else {
                zrle_encode_16le(vs, x, y, w, h, zywrle_level);
            }
        } else {
            if (be) {
                zrle_encode_15be(vs, x, y, w, h, zywrle_level);
            } else {
                zrle_encode_15le(vs, x, y, w, h, zywrle_level);
            }
        }
        break;

    case 4:
    {
        bool fits_in_ls3bytes;
        bool fits_in_ms3bytes;

        fits_in_ls3bytes =
            ((vs->client_pf.rmax << vs->client_pf.rshift) < (1 << 24) &&
             (vs->client_pf.gmax << vs->client_pf.gshift) < (1 << 24) &&
             (vs->client_pf.bmax << vs->client_pf.bshift) < (1 << 24));

        fits_in_ms3bytes = (vs->client_pf.rshift > 7 &&
                            vs->client_pf.gshift > 7 &&
                            vs->client_pf.bshift > 7);

        if ((fits_in_ls3bytes && !be) || (fits_in_ms3bytes && be)) {
            if (be) {
                zrle_encode_24abe(vs, x, y, w, h, zywrle_level);
            } else {
                zrle_encode_24ale(vs, x, y, w, h, zywrle_level);
          }
        } else if ((fits_in_ls3bytes && be) || (fits_in_ms3bytes && !be)) {
            if (be) {
                zrle_encode_24bbe(vs, x, y, w, h, zywrle_level);
            } else {
                zrle_encode_24ble(vs, x, y, w, h, zywrle_level);
            }
        } else {
            if (be) {
                zrle_encode_32be(vs, x, y, w, h, zywrle_level);
            } else {
                zrle_encode_32le(vs, x, y, w, h, zywrle_level);
            }
        }
    }
    break;
    }

    vnc_zrle_stop(vs);
    bytes = zrle_compress_data(vs, Z_DEFAULT_COMPRESSION);
    vnc_framebuffer_update(vs, x, y, w, h, vs->zrle.type);
    vnc_write_u32(vs, bytes);
    vnc_write(vs, vs->zrle.zlib.buffer, vs->zrle.zlib.offset);
    return 1;
}

int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
{
    vs->zrle.type = VNC_ENCODING_ZRLE;
    return zrle_send_framebuffer_update(vs, x, y, w, h);
}

int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
{
    vs->zrle.type = VNC_ENCODING_ZYWRLE;
    return zrle_send_framebuffer_update(vs, x, y, w, h);
}

void vnc_zrle_clear(VncState *vs)
{
    if (vs->zrle.stream.opaque) {
        deflateEnd(&vs->zrle.stream);
    }
    buffer_free(&vs->zrle.zrle);
    buffer_free(&vs->zrle.fb);
    buffer_free(&vs->zrle.zlib);
}
Commit	Line	Data
148954fa CC	1	/*
	2	* QEMU VNC display driver: Zlib Run-length Encoding (ZRLE)
	3	*
	4	* From libvncserver/libvncserver/zrle.c
	5	* Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
	6	* Copyright (C) 2003 Sun Microsystems, Inc.
	7	*
	8	* Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
	9	*
	10	* Permission is hereby granted, free of charge, to any person obtaining a copy
	11	* of this software and associated documentation files (the "Software"), to deal
	12	* in the Software without restriction, including without limitation the rights
	13	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	14	* copies of the Software, and to permit persons to whom the Software is
	15	* furnished to do so, subject to the following conditions:
	16	*
	17	* The above copyright notice and this permission notice shall be included in
	18	* all copies or substantial portions of the Software.
	19	*
	20	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	21	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	23	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	24	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	25	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	26	* THE SOFTWARE.
	27	*/
	28
e16f4c87	29	#include "qemu/osdep.h"
148954fa CC	30	#include "vnc.h"
	31	#include "vnc-enc-zrle.h"
	32
	33	static const int bits_per_packed_pixel[] = {
	34	0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
	35	};
	36
	37
	38	static void vnc_zrle_start(VncState *vs)
	39	{
	40	buffer_reset(&vs->zrle.zrle);
	41
	42	/* make the output buffer be the zlib buffer, so we can compress it later */
	43	vs->zrle.tmp = vs->output;
	44	vs->output = vs->zrle.zrle;
	45	}
	46
	47	static void vnc_zrle_stop(VncState *vs)
	48	{
	49	/* switch back to normal output/zlib buffers */
	50	vs->zrle.zrle = vs->output;
	51	vs->output = vs->zrle.tmp;
	52	}
	53
	54	static void zrle_convert_fb(VncState vs, int x, int y, int w, int h,
	55	int bpp)
	56	{
	57	Buffer tmp;
	58
	59	buffer_reset(&vs->zrle.fb);
	60	buffer_reserve(&vs->zrle.fb, w * h * bpp + bpp);
	61
	62	tmp = vs->output;
	63	vs->output = vs->zrle.fb;
	64
	65	vnc_raw_send_framebuffer_update(vs, x, y, w, h);
	66
	67	vs->zrle.fb = vs->output;
	68	vs->output = tmp;
	69	return vs->zrle.fb.buffer;
	70	}
	71
	72	static int zrle_compress_data(VncState *vs, int level)
	73	{
	74	z_streamp zstream = &vs->zrle.stream;
	75
	76	buffer_reset(&vs->zrle.zlib);
	77
	78	if (zstream->opaque != vs) {
	79	int err;
	80
	81	zstream->zalloc = vnc_zlib_zalloc;
	82	zstream->zfree = vnc_zlib_zfree;
	83
	84	err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
	85	MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
	86
	87	if (err != Z_OK) {
	88	fprintf(stderr, "VNC: error initializing zlib\n");
	89	return -1;
	90	}
	91
	92	zstream->opaque = vs;
	93	}
94
95	/* reserve memory in output buffer */
96	buffer_reserve(&vs->zrle.zlib, vs->zrle.zrle.offset + 64);
97
98	/* set pointers */
99	zstream->next_in = vs->zrle.zrle.buffer;
100	zstream->avail_in = vs->zrle.zrle.offset;
101	zstream->next_out = vs->zrle.zlib.buffer + vs->zrle.zlib.offset;
102	zstream->avail_out = vs->zrle.zlib.capacity - vs->zrle.zlib.offset;
103	zstream->data_type = Z_BINARY;
104
105	/* start encoding */
106	if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
107	fprintf(stderr, "VNC: error during zrle compression\n");
108	return -1;
109	}
110
111	vs->zrle.zlib.offset = vs->zrle.zlib.capacity - zstream->avail_out;
112	return vs->zrle.zlib.offset;
113	}
114
115	/* Try to work out whether to use RLE and/or a palette. We do this by
116	* estimating the number of bytes which will be generated and picking the
117	* method which results in the fewest bytes. Of course this may not result
118	* in the fewest bytes after compression... */
119	static void zrle_choose_palette_rle(VncState *vs, int w, int h,
120	VncPalette *palette, int bpp_out,
121	int runs, int single_pixels,
122	int zywrle_level,
123	bool use_rle, bool use_palette)
124	{
125	size_t estimated_bytes;
126	size_t plain_rle_bytes;
127
128	use_palette = use_rle = false;
129
130	estimated_bytes = w * h * (bpp_out / 8); /* start assuming raw */
131
132	if (bpp_out != 8) {
133	if (zywrle_level > 0 && !(zywrle_level & 0x80))
134	estimated_bytes >>= zywrle_level;
135	}
136
137	plain_rle_bytes = ((bpp_out / 8) + 1) * (runs + single_pixels);
138
139	if (plain_rle_bytes < estimated_bytes) {
140	*use_rle = true;
141	estimated_bytes = plain_rle_bytes;
142	}
143
144	if (palette_size(palette) < 128) {
145	int palette_rle_bytes;
146
147	palette_rle_bytes = (bpp_out / 8) * palette_size(palette);
148	palette_rle_bytes += 2 * runs + single_pixels;
149
150	if (palette_rle_bytes < estimated_bytes) {
151	*use_rle = true;
152	*use_palette = true;
153	estimated_bytes = palette_rle_bytes;
154	}
155
156	if (palette_size(palette) < 17) {
157	int packed_bytes;
158
159	packed_bytes = (bpp_out / 8) * palette_size(palette);
160	packed_bytes += w * h *
161	bits_per_packed_pixel[palette_size(palette)-1] / 8;
162
163	if (packed_bytes < estimated_bytes) {
164	*use_rle = false;
165	*use_palette = true;
166	estimated_bytes = packed_bytes;
167	}
168	}
169	}
170	}
171
172	static void zrle_write_u32(VncState *vs, uint32_t value)
173	{
174	vnc_write(vs, (uint8_t *)&value, 4);
175	}
176
177	static void zrle_write_u24a(VncState *vs, uint32_t value)
178	{
179	vnc_write(vs, (uint8_t *)&value, 3);
180	}
181
182	static void zrle_write_u24b(VncState *vs, uint32_t value)
183	{
184	vnc_write(vs, ((uint8_t *)&value) + 1, 3);
185	}
186
187	static void zrle_write_u16(VncState *vs, uint16_t value)
188	{
189	vnc_write(vs, (uint8_t *)&value, 2);
190	}
191
192	static void zrle_write_u8(VncState *vs, uint8_t value)
193	{
194	vnc_write_u8(vs, value);
195	}
196
197	#define ENDIAN_LITTLE 0
198	#define ENDIAN_BIG 1
199	#define ENDIAN_NO 2
200
201	#define ZRLE_BPP 8
202	#define ZYWRLE_ENDIAN ENDIAN_NO
203	#include "vnc-enc-zrle-template.c"
204	#undef ZRLE_BPP
205
206	#define ZRLE_BPP 15
207	#undef ZYWRLE_ENDIAN
208	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
209	#include "vnc-enc-zrle-template.c"
210
211	#undef ZYWRLE_ENDIAN
212	#define ZYWRLE_ENDIAN ENDIAN_BIG
213	#include "vnc-enc-zrle-template.c"
214
215	#undef ZRLE_BPP
216	#define ZRLE_BPP 16
217	#undef ZYWRLE_ENDIAN
218	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
219	#include "vnc-enc-zrle-template.c"
220
221	#undef ZYWRLE_ENDIAN
222	#define ZYWRLE_ENDIAN ENDIAN_BIG
223	#include "vnc-enc-zrle-template.c"
224
225	#undef ZRLE_BPP
226	#define ZRLE_BPP 32
227	#undef ZYWRLE_ENDIAN
228	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
229	#include "vnc-enc-zrle-template.c"
230
231	#undef ZYWRLE_ENDIAN
232	#define ZYWRLE_ENDIAN ENDIAN_BIG
233	#include "vnc-enc-zrle-template.c"
234
235	#define ZRLE_COMPACT_PIXEL 24a
236	#undef ZYWRLE_ENDIAN
237	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
238	#include "vnc-enc-zrle-template.c"
239
240	#undef ZYWRLE_ENDIAN
241	#define ZYWRLE_ENDIAN ENDIAN_BIG
242	#include "vnc-enc-zrle-template.c"
243
244	#undef ZRLE_COMPACT_PIXEL
245	#define ZRLE_COMPACT_PIXEL 24b
246	#undef ZYWRLE_ENDIAN
247	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
248	#include "vnc-enc-zrle-template.c"
249
250	#undef ZYWRLE_ENDIAN
251	#define ZYWRLE_ENDIAN ENDIAN_BIG
252	#include "vnc-enc-zrle-template.c"
253	#undef ZRLE_COMPACT_PIXEL
254	#undef ZRLE_BPP
255
256	static int zrle_send_framebuffer_update(VncState *vs, int x, int y,
257	int w, int h)
258	{
9f64916d	259	bool be = vs->client_be;
148954fa CC	260	size_t bytes;
	261	int zywrle_level;
	262
	263	if (vs->zrle.type == VNC_ENCODING_ZYWRLE) {
368d2588 CC	264	if (!vs->vd->lossy \|\| vs->tight.quality == (uint8_t)-1
368d2588 CC	265	\|\| vs->tight.quality == 9) {
148954fa CC	266	zywrle_level = 0;
	267	vs->zrle.type = VNC_ENCODING_ZRLE;
	268	} else if (vs->tight.quality < 3) {
	269	zywrle_level = 3;
	270	} else if (vs->tight.quality < 6) {
	271	zywrle_level = 2;
	272	} else {
	273	zywrle_level = 1;
	274	}
	275	} else {
	276	zywrle_level = 0;
	277	}
	278
	279	vnc_zrle_start(vs);
	280
9f64916d	281	switch (vs->client_pf.bytes_per_pixel) {
148954fa CC	282	case 1:
	283	zrle_encode_8ne(vs, x, y, w, h, zywrle_level);
	284	break;
	285
	286	case 2:
9f64916d	287	if (vs->client_pf.gmax > 0x1F) {
148954fa CC	288	if (be) {
	289	zrle_encode_16be(vs, x, y, w, h, zywrle_level);
	290	} else {
	291	zrle_encode_16le(vs, x, y, w, h, zywrle_level);
	292	}
	293	} else {
	294	if (be) {
	295	zrle_encode_15be(vs, x, y, w, h, zywrle_level);
	296	} else {
	297	zrle_encode_15le(vs, x, y, w, h, zywrle_level);
	298	}
	299	}
	300	break;
	301
	302	case 4:
	303	{
	304	bool fits_in_ls3bytes;
	305	bool fits_in_ms3bytes;
	306
	307	fits_in_ls3bytes =
9f64916d GH	308	((vs->client_pf.rmax << vs->client_pf.rshift) < (1 << 24) &&
	309	(vs->client_pf.gmax << vs->client_pf.gshift) < (1 << 24) &&
	310	(vs->client_pf.bmax << vs->client_pf.bshift) < (1 << 24));
148954fa	311
9f64916d GH	312	fits_in_ms3bytes = (vs->client_pf.rshift > 7 &&
	313	vs->client_pf.gshift > 7 &&
	314	vs->client_pf.bshift > 7);
148954fa CC	315
	316	if ((fits_in_ls3bytes && !be) \|\| (fits_in_ms3bytes && be)) {
	317	if (be) {
	318	zrle_encode_24abe(vs, x, y, w, h, zywrle_level);
	319	} else {
	320	zrle_encode_24ale(vs, x, y, w, h, zywrle_level);
	321	}
	322	} else if ((fits_in_ls3bytes && be) \|\| (fits_in_ms3bytes && !be)) {
	323	if (be) {
	324	zrle_encode_24bbe(vs, x, y, w, h, zywrle_level);
	325	} else {
	326	zrle_encode_24ble(vs, x, y, w, h, zywrle_level);
	327	}
	328	} else {
	329	if (be) {
	330	zrle_encode_32be(vs, x, y, w, h, zywrle_level);
	331	} else {
	332	zrle_encode_32le(vs, x, y, w, h, zywrle_level);
	333	}
	334	}
	335	}
	336	break;
	337	}
	338
	339	vnc_zrle_stop(vs);
	340	bytes = zrle_compress_data(vs, Z_DEFAULT_COMPRESSION);
	341	vnc_framebuffer_update(vs, x, y, w, h, vs->zrle.type);
	342	vnc_write_u32(vs, bytes);
	343	vnc_write(vs, vs->zrle.zlib.buffer, vs->zrle.zlib.offset);
	344	return 1;
	345	}
	346
	347	int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
	348	{
	349	vs->zrle.type = VNC_ENCODING_ZRLE;
	350	return zrle_send_framebuffer_update(vs, x, y, w, h);
	351	}
	352
	353	int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
	354	{
	355	vs->zrle.type = VNC_ENCODING_ZYWRLE;
	356	return zrle_send_framebuffer_update(vs, x, y, w, h);
	357	}
	358
	359	void vnc_zrle_clear(VncState *vs)
	360	{
	361	if (vs->zrle.stream.opaque) {
	362	deflateEnd(&vs->zrle.stream);
	363	}
	364	buffer_free(&vs->zrle.zrle);
	365	buffer_free(&vs->zrle.fb);
	366	buffer_free(&vs->zrle.zlib);
	367	}