[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 <[email protected]>
 *
 * 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 "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 <[email protected]>
	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
	29	#include "vnc.h"
	30	#include "vnc-enc-zrle.h"
	31
	32	static const int bits_per_packed_pixel[] = {
	33	0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
	34	};
	35
	36
	37	static void vnc_zrle_start(VncState *vs)
	38	{
	39	buffer_reset(&vs->zrle.zrle);
	40
	41	/* make the output buffer be the zlib buffer, so we can compress it later */
	42	vs->zrle.tmp = vs->output;
	43	vs->output = vs->zrle.zrle;
	44	}
	45
	46	static void vnc_zrle_stop(VncState *vs)
	47	{
	48	/* switch back to normal output/zlib buffers */
	49	vs->zrle.zrle = vs->output;
	50	vs->output = vs->zrle.tmp;
	51	}
	52
	53	static void zrle_convert_fb(VncState vs, int x, int y, int w, int h,
	54	int bpp)
	55	{
	56	Buffer tmp;
	57
	58	buffer_reset(&vs->zrle.fb);
	59	buffer_reserve(&vs->zrle.fb, w * h * bpp + bpp);
	60
	61	tmp = vs->output;
	62	vs->output = vs->zrle.fb;
	63
	64	vnc_raw_send_framebuffer_update(vs, x, y, w, h);
65
66	vs->zrle.fb = vs->output;
67	vs->output = tmp;
68	return vs->zrle.fb.buffer;
69	}
70
71	static int zrle_compress_data(VncState *vs, int level)
72	{
73	z_streamp zstream = &vs->zrle.stream;
74
75	buffer_reset(&vs->zrle.zlib);
76
77	if (zstream->opaque != vs) {
78	int err;
79
80	zstream->zalloc = vnc_zlib_zalloc;
81	zstream->zfree = vnc_zlib_zfree;
82
83	err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
84	MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
85
86	if (err != Z_OK) {
87	fprintf(stderr, "VNC: error initializing zlib\n");
88	return -1;
89	}
90
91	zstream->opaque = vs;
92	}
93
94	/* reserve memory in output buffer */
95	buffer_reserve(&vs->zrle.zlib, vs->zrle.zrle.offset + 64);
96
97	/* set pointers */
98	zstream->next_in = vs->zrle.zrle.buffer;
99	zstream->avail_in = vs->zrle.zrle.offset;
100	zstream->next_out = vs->zrle.zlib.buffer + vs->zrle.zlib.offset;
101	zstream->avail_out = vs->zrle.zlib.capacity - vs->zrle.zlib.offset;
102	zstream->data_type = Z_BINARY;
103
104	/* start encoding */
105	if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
106	fprintf(stderr, "VNC: error during zrle compression\n");
107	return -1;
108	}
109
110	vs->zrle.zlib.offset = vs->zrle.zlib.capacity - zstream->avail_out;
111	return vs->zrle.zlib.offset;
112	}
113
114	/* Try to work out whether to use RLE and/or a palette. We do this by
115	* estimating the number of bytes which will be generated and picking the
116	* method which results in the fewest bytes. Of course this may not result
117	* in the fewest bytes after compression... */
118	static void zrle_choose_palette_rle(VncState *vs, int w, int h,
119	VncPalette *palette, int bpp_out,
120	int runs, int single_pixels,
121	int zywrle_level,
122	bool use_rle, bool use_palette)
123	{
124	size_t estimated_bytes;
125	size_t plain_rle_bytes;
126
127	use_palette = use_rle = false;
128
129	estimated_bytes = w * h * (bpp_out / 8); /* start assuming raw */
130
131	if (bpp_out != 8) {
132	if (zywrle_level > 0 && !(zywrle_level & 0x80))
133	estimated_bytes >>= zywrle_level;
134	}
135
136	plain_rle_bytes = ((bpp_out / 8) + 1) * (runs + single_pixels);
137
138	if (plain_rle_bytes < estimated_bytes) {
139	*use_rle = true;
140	estimated_bytes = plain_rle_bytes;
141	}
142
143	if (palette_size(palette) < 128) {
144	int palette_rle_bytes;
145
146	palette_rle_bytes = (bpp_out / 8) * palette_size(palette);
147	palette_rle_bytes += 2 * runs + single_pixels;
148
149	if (palette_rle_bytes < estimated_bytes) {
150	*use_rle = true;
151	*use_palette = true;
152	estimated_bytes = palette_rle_bytes;
153	}
154
155	if (palette_size(palette) < 17) {
156	int packed_bytes;
157
158	packed_bytes = (bpp_out / 8) * palette_size(palette);
159	packed_bytes += w * h *
160	bits_per_packed_pixel[palette_size(palette)-1] / 8;
161
162	if (packed_bytes < estimated_bytes) {
163	*use_rle = false;
164	*use_palette = true;
165	estimated_bytes = packed_bytes;
166	}
167	}
168	}
169	}
170
171	static void zrle_write_u32(VncState *vs, uint32_t value)
172	{
173	vnc_write(vs, (uint8_t *)&value, 4);
174	}
175
176	static void zrle_write_u24a(VncState *vs, uint32_t value)
177	{
178	vnc_write(vs, (uint8_t *)&value, 3);
179	}
180
181	static void zrle_write_u24b(VncState *vs, uint32_t value)
182	{
183	vnc_write(vs, ((uint8_t *)&value) + 1, 3);
184	}
185
186	static void zrle_write_u16(VncState *vs, uint16_t value)
187	{
188	vnc_write(vs, (uint8_t *)&value, 2);
189	}
190
191	static void zrle_write_u8(VncState *vs, uint8_t value)
192	{
193	vnc_write_u8(vs, value);
194	}
195
196	#define ENDIAN_LITTLE 0
197	#define ENDIAN_BIG 1
198	#define ENDIAN_NO 2
199
200	#define ZRLE_BPP 8
201	#define ZYWRLE_ENDIAN ENDIAN_NO
202	#include "vnc-enc-zrle-template.c"
203	#undef ZRLE_BPP
204
205	#define ZRLE_BPP 15
206	#undef ZYWRLE_ENDIAN
207	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
208	#include "vnc-enc-zrle-template.c"
209
210	#undef ZYWRLE_ENDIAN
211	#define ZYWRLE_ENDIAN ENDIAN_BIG
212	#include "vnc-enc-zrle-template.c"
213
214	#undef ZRLE_BPP
215	#define ZRLE_BPP 16
216	#undef ZYWRLE_ENDIAN
217	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
218	#include "vnc-enc-zrle-template.c"
219
220	#undef ZYWRLE_ENDIAN
221	#define ZYWRLE_ENDIAN ENDIAN_BIG
222	#include "vnc-enc-zrle-template.c"
223
224	#undef ZRLE_BPP
225	#define ZRLE_BPP 32
226	#undef ZYWRLE_ENDIAN
227	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
228	#include "vnc-enc-zrle-template.c"
229
230	#undef ZYWRLE_ENDIAN
231	#define ZYWRLE_ENDIAN ENDIAN_BIG
232	#include "vnc-enc-zrle-template.c"
233
234	#define ZRLE_COMPACT_PIXEL 24a
235	#undef ZYWRLE_ENDIAN
236	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
237	#include "vnc-enc-zrle-template.c"
238
239	#undef ZYWRLE_ENDIAN
240	#define ZYWRLE_ENDIAN ENDIAN_BIG
241	#include "vnc-enc-zrle-template.c"
242
243	#undef ZRLE_COMPACT_PIXEL
244	#define ZRLE_COMPACT_PIXEL 24b
245	#undef ZYWRLE_ENDIAN
246	#define ZYWRLE_ENDIAN ENDIAN_LITTLE
247	#include "vnc-enc-zrle-template.c"
248
249	#undef ZYWRLE_ENDIAN
250	#define ZYWRLE_ENDIAN ENDIAN_BIG
251	#include "vnc-enc-zrle-template.c"
252	#undef ZRLE_COMPACT_PIXEL
253	#undef ZRLE_BPP
254
255	static int zrle_send_framebuffer_update(VncState *vs, int x, int y,
256	int w, int h)
257	{
9f64916d	258	bool be = vs->client_be;
148954fa CC	259	size_t bytes;
	260	int zywrle_level;
	261
	262	if (vs->zrle.type == VNC_ENCODING_ZYWRLE) {
368d2588 CC	263	if (!vs->vd->lossy \|\| vs->tight.quality == (uint8_t)-1
368d2588 CC	264	\|\| vs->tight.quality == 9) {
148954fa CC	265	zywrle_level = 0;
	266	vs->zrle.type = VNC_ENCODING_ZRLE;
	267	} else if (vs->tight.quality < 3) {
	268	zywrle_level = 3;
	269	} else if (vs->tight.quality < 6) {
	270	zywrle_level = 2;
	271	} else {
	272	zywrle_level = 1;
	273	}
	274	} else {
	275	zywrle_level = 0;
	276	}
	277
	278	vnc_zrle_start(vs);
	279
9f64916d	280	switch (vs->client_pf.bytes_per_pixel) {
148954fa CC	281	case 1:
	282	zrle_encode_8ne(vs, x, y, w, h, zywrle_level);
	283	break;
	284
	285	case 2:
9f64916d	286	if (vs->client_pf.gmax > 0x1F) {
148954fa CC	287	if (be) {
	288	zrle_encode_16be(vs, x, y, w, h, zywrle_level);
	289	} else {
	290	zrle_encode_16le(vs, x, y, w, h, zywrle_level);
	291	}
	292	} else {
	293	if (be) {
	294	zrle_encode_15be(vs, x, y, w, h, zywrle_level);
	295	} else {
	296	zrle_encode_15le(vs, x, y, w, h, zywrle_level);
	297	}
	298	}
	299	break;
	300
	301	case 4:
	302	{
	303	bool fits_in_ls3bytes;
	304	bool fits_in_ms3bytes;
	305
	306	fits_in_ls3bytes =
9f64916d GH	307	((vs->client_pf.rmax << vs->client_pf.rshift) < (1 << 24) &&
	308	(vs->client_pf.gmax << vs->client_pf.gshift) < (1 << 24) &&
	309	(vs->client_pf.bmax << vs->client_pf.bshift) < (1 << 24));
148954fa	310
9f64916d GH	311	fits_in_ms3bytes = (vs->client_pf.rshift > 7 &&
	312	vs->client_pf.gshift > 7 &&
	313	vs->client_pf.bshift > 7);
148954fa CC	314
	315	if ((fits_in_ls3bytes && !be) \|\| (fits_in_ms3bytes && be)) {
	316	if (be) {
	317	zrle_encode_24abe(vs, x, y, w, h, zywrle_level);
	318	} else {
	319	zrle_encode_24ale(vs, x, y, w, h, zywrle_level);
	320	}
	321	} else if ((fits_in_ls3bytes && be) \|\| (fits_in_ms3bytes && !be)) {
	322	if (be) {
	323	zrle_encode_24bbe(vs, x, y, w, h, zywrle_level);
	324	} else {
	325	zrle_encode_24ble(vs, x, y, w, h, zywrle_level);
	326	}
	327	} else {
	328	if (be) {
	329	zrle_encode_32be(vs, x, y, w, h, zywrle_level);
	330	} else {
	331	zrle_encode_32le(vs, x, y, w, h, zywrle_level);
	332	}
	333	}
	334	}
	335	break;
	336	}
	337
	338	vnc_zrle_stop(vs);
	339	bytes = zrle_compress_data(vs, Z_DEFAULT_COMPRESSION);
	340	vnc_framebuffer_update(vs, x, y, w, h, vs->zrle.type);
	341	vnc_write_u32(vs, bytes);
	342	vnc_write(vs, vs->zrle.zlib.buffer, vs->zrle.zlib.offset);
	343	return 1;
	344	}
	345
	346	int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
	347	{
	348	vs->zrle.type = VNC_ENCODING_ZRLE;
	349	return zrle_send_framebuffer_update(vs, x, y, w, h);
	350	}
	351
	352	int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
	353	{
	354	vs->zrle.type = VNC_ENCODING_ZYWRLE;
	355	return zrle_send_framebuffer_update(vs, x, y, w, h);
	356	}
	357
	358	void vnc_zrle_clear(VncState *vs)
	359	{
	360	if (vs->zrle.stream.opaque) {
	361	deflateEnd(&vs->zrle.stream);
	362	}
	363	buffer_free(&vs->zrle.zrle);
	364	buffer_free(&vs->zrle.fb);
	365	buffer_free(&vs->zrle.zlib);
	366	}