Adding qemu as a submodule of KVMFORNFV

This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>

1 files changed, 0 insertions, 1697 deletions

diff --git a/qemu/ui/vnc-enc-tight.c b/qemu/ui/vnc-enc-tight.c
deleted file mode 100644
index e5cba0e5a..000000000
--- a/qemu/ui/vnc-enc-tight.c
+++ /dev/null
@@ -1,1697 +0,0 @@
-/*
- * QEMU VNC display driver: tight encoding
- *
- * From libvncserver/libvncserver/tight.c
- * Copyright (C) 2000, 2001 Const Kaplinsky.  All Rights Reserved.
- * Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
- *
- * 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"
-
-/* This needs to be before jpeglib.h line because of conflict with
-   INT32 definitions between jmorecfg.h (included by jpeglib.h) and
-   Win32 basetsd.h (included by windows.h). */
-#include "qemu-common.h"
-
-#ifdef CONFIG_VNC_PNG
-/* The following define is needed by pngconf.h. Otherwise it won't compile,
-   because setjmp.h was already included by qemu-common.h. */
-#define PNG_SKIP_SETJMP_CHECK
-#include <png.h>
-#endif
-#ifdef CONFIG_VNC_JPEG
-#include <jpeglib.h>
-#endif
-
-#include "qemu/bswap.h"
-#include "qapi/qmp/qint.h"
-#include "vnc.h"
-#include "vnc-enc-tight.h"
-#include "vnc-palette.h"
-
-/* Compression level stuff. The following array contains various
-   encoder parameters for each of 10 compression levels (0..9).
-   Last three parameters correspond to JPEG quality levels (0..9). */
-
-static const struct {
-    int max_rect_size, max_rect_width;
-    int mono_min_rect_size, gradient_min_rect_size;
-    int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
-    int gradient_threshold, gradient_threshold24;
-    int idx_max_colors_divisor;
-    int jpeg_quality, jpeg_threshold, jpeg_threshold24;
-} tight_conf[] = {
-    {   512,   32,   6, 65536, 0, 0, 0, 0,   0,   0,   4,  5, 10000, 23000 },
-    {  2048,  128,   6, 65536, 1, 1, 1, 0,   0,   0,   8, 10,  8000, 18000 },
-    {  6144,  256,   8, 65536, 3, 3, 2, 0,   0,   0,  24, 15,  6500, 15000 },
-    { 10240, 1024,  12, 65536, 5, 5, 3, 0,   0,   0,  32, 25,  5000, 12000 },
-    { 16384, 2048,  12, 65536, 6, 6, 4, 0,   0,   0,  32, 37,  4000, 10000 },
-    { 32768, 2048,  12,  4096, 7, 7, 5, 4, 150, 380,  32, 50,  3000,  8000 },
-    { 65536, 2048,  16,  4096, 7, 7, 6, 4, 170, 420,  48, 60,  2000,  5000 },
-    { 65536, 2048,  16,  4096, 8, 8, 7, 5, 180, 450,  64, 70,  1000,  2500 },
-    { 65536, 2048,  32,  8192, 9, 9, 8, 6, 190, 475,  64, 75,   500,  1200 },
-    { 65536, 2048,  32,  8192, 9, 9, 9, 6, 200, 500,  96, 80,   200,   500 }
-};
-
-
-static int tight_send_framebuffer_update(VncState *vs, int x, int y,
-                                         int w, int h);
-
-#ifdef CONFIG_VNC_JPEG
-static const struct {
-    double jpeg_freq_min;       /* Don't send JPEG if the freq is bellow */
-    double jpeg_freq_threshold; /* Always send JPEG if the freq is above */
-    int jpeg_idx;               /* Allow indexed JPEG */
-    int jpeg_full;              /* Allow full color JPEG */
-} tight_jpeg_conf[] = {
-    { 0,   8,  1, 1 },
-    { 0,   8,  1, 1 },
-    { 0,   8,  1, 1 },
-    { 0,   8,  1, 1 },
-    { 0,   10, 1, 1 },
-    { 0.1, 10, 1, 1 },
-    { 0.2, 10, 1, 1 },
-    { 0.3, 12, 0, 0 },
-    { 0.4, 14, 0, 0 },
-    { 0.5, 16, 0, 0 },
-};
-#endif
-
-#ifdef CONFIG_VNC_PNG
-static const struct {
-    int png_zlib_level, png_filters;
-} tight_png_conf[] = {
-    { 0, PNG_NO_FILTERS },
-    { 1, PNG_NO_FILTERS },
-    { 2, PNG_NO_FILTERS },
-    { 3, PNG_NO_FILTERS },
-    { 4, PNG_NO_FILTERS },
-    { 5, PNG_ALL_FILTERS },
-    { 6, PNG_ALL_FILTERS },
-    { 7, PNG_ALL_FILTERS },
-    { 8, PNG_ALL_FILTERS },
-    { 9, PNG_ALL_FILTERS },
-};
-
-static int send_png_rect(VncState *vs, int x, int y, int w, int h,
-                         VncPalette *palette);
-
-static bool tight_can_send_png_rect(VncState *vs, int w, int h)
-{
-    if (vs->tight.type != VNC_ENCODING_TIGHT_PNG) {
-        return false;
-    }
-
-    if (surface_bytes_per_pixel(vs->vd->ds) == 1 ||
-        vs->client_pf.bytes_per_pixel == 1) {
-        return false;
-    }
-
-    return true;
-}
-#endif
-
-/*
- * Code to guess if given rectangle is suitable for smooth image
- * compression (by applying "gradient" filter or JPEG coder).
- */
-
-static unsigned int
-tight_detect_smooth_image24(VncState *vs, int w, int h)
-{
-    int off;
-    int x, y, d, dx;
-    unsigned int c;
-    unsigned int stats[256];
-    int pixels = 0;
-    int pix, left[3];
-    unsigned int errors;
-    unsigned char *buf = vs->tight.tight.buffer;
-
-    /*
-     * If client is big-endian, color samples begin from the second
-     * byte (offset 1) of a 32-bit pixel value.
-     */
-    off = vs->client_be;
-
-    memset(stats, 0, sizeof (stats));
-
-    for (y = 0, x = 0; y < h && x < w;) {
-        for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH;
-             d++) {
-            for (c = 0; c < 3; c++) {
-                left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF;
-            }
-            for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) {
-                for (c = 0; c < 3; c++) {
-                    pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF;
-                    stats[abs(pix - left[c])]++;
-                    left[c] = pix;
-                }
-                pixels++;
-            }
-        }
-        if (w > h) {
-            x += h;
-            y = 0;
-        } else {
-            x = 0;
-            y += w;
-        }
-    }
-
-    if (pixels == 0) {
-        return 0;
-    }
-
-    /* 95% smooth or more ... */
-    if (stats[0] * 33 / pixels >= 95) {
-        return 0;
-    }
-
-    errors = 0;
-    for (c = 1; c < 8; c++) {
-        errors += stats[c] * (c * c);
-        if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {
-            return 0;
-        }
-    }
-    for (; c < 256; c++) {
-        errors += stats[c] * (c * c);
-    }
-    errors /= (pixels * 3 - stats[0]);
-
-    return errors;
-}
-
-#define DEFINE_DETECT_FUNCTION(bpp)                                     \
-                                                                        \
-    static unsigned int                                                 \
-    tight_detect_smooth_image##bpp(VncState *vs, int w, int h) {        \
-        bool endian;                                                    \
-        uint##bpp##_t pix;                                              \
-        int max[3], shift[3];                                           \
-        int x, y, d, dx;                                                \
-        unsigned int c;                                                 \
-        unsigned int stats[256];                                        \
-        int pixels = 0;                                                 \
-        int sample, sum, left[3];                                       \
-        unsigned int errors;                                            \
-        unsigned char *buf = vs->tight.tight.buffer;                    \
-                                                                        \
-        endian = 0; /* FIXME */                                         \
-                                                                        \
-                                                                        \
-        max[0] = vs->client_pf.rmax;                                  \
-        max[1] = vs->client_pf.gmax;                                  \
-        max[2] = vs->client_pf.bmax;                                  \
-        shift[0] = vs->client_pf.rshift;                              \
-        shift[1] = vs->client_pf.gshift;                              \
-        shift[2] = vs->client_pf.bshift;                              \
-                                                                        \
-        memset(stats, 0, sizeof(stats));                                \
-                                                                        \
-        y = 0, x = 0;                                                   \
-        while (y < h && x < w) {                                        \
-            for (d = 0; d < h - y &&                                    \
-                     d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) {  \
-                pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d];              \
-                if (endian) {                                           \
-                    pix = bswap##bpp(pix);                              \
-                }                                                       \
-                for (c = 0; c < 3; c++) {                               \
-                    left[c] = (int)(pix >> shift[c] & max[c]);          \
-                }                                                       \
-                for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH;       \
-                     dx++) {                                            \
-                    pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx];       \
-                    if (endian) {                                       \
-                        pix = bswap##bpp(pix);                          \
-                    }                                                   \
-                    sum = 0;                                            \
-                    for (c = 0; c < 3; c++) {                           \
-                        sample = (int)(pix >> shift[c] & max[c]);       \
-                        sum += abs(sample - left[c]);                   \
-                        left[c] = sample;                               \
-                    }                                                   \
-                    if (sum > 255) {                                    \
-                        sum = 255;                                      \
-                    }                                                   \
-                    stats[sum]++;                                       \
-                    pixels++;                                           \
-                }                                                       \
-            }                                                           \
-            if (w > h) {                                                \
-                x += h;                                                 \
-                y = 0;                                                  \
-            } else {                                                    \
-                x = 0;                                                  \
-                y += w;                                                 \
-            }                                                           \
-        }                                                               \
-        if (pixels == 0) {                                              \
-            return 0;                                                   \
-        }                                                               \
-        if ((stats[0] + stats[1]) * 100 / pixels >= 90) {               \
-            return 0;                                                   \
-        }                                                               \
-                                                                        \
-        errors = 0;                                                     \
-        for (c = 1; c < 8; c++) {                                       \
-            errors += stats[c] * (c * c);                               \
-            if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {           \
-                return 0;                                               \
-            }                                                           \
-        }                                                               \
-        for (; c < 256; c++) {                                          \
-            errors += stats[c] * (c * c);                               \
-        }                                                               \
-        errors /= (pixels - stats[0]);                                  \
-                                                                        \
-        return errors;                                                  \
-    }
-
-DEFINE_DETECT_FUNCTION(16)
-DEFINE_DETECT_FUNCTION(32)
-
-static int
-tight_detect_smooth_image(VncState *vs, int w, int h)
-{
-    unsigned int errors;
-    int compression = vs->tight.compression;
-    int quality = vs->tight.quality;
-
-    if (!vs->vd->lossy) {
-        return 0;
-    }
-
-    if (surface_bytes_per_pixel(vs->vd->ds) == 1 ||
-        vs->client_pf.bytes_per_pixel == 1 ||
-        w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
-        return 0;
-    }
-
-    if (vs->tight.quality != (uint8_t)-1) {
-        if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
-            return 0;
-        }
-    } else {
-        if (w * h < tight_conf[compression].gradient_min_rect_size) {
-            return 0;
-        }
-    }
-
-    if (vs->client_pf.bytes_per_pixel == 4) {
-        if (vs->tight.pixel24) {
-            errors = tight_detect_smooth_image24(vs, w, h);
-            if (vs->tight.quality != (uint8_t)-1) {
-                return (errors < tight_conf[quality].jpeg_threshold24);
-            }
-            return (errors < tight_conf[compression].gradient_threshold24);
-        } else {
-            errors = tight_detect_smooth_image32(vs, w, h);
-        }
-    } else {
-        errors = tight_detect_smooth_image16(vs, w, h);
-    }
-    if (quality != (uint8_t)-1) {
-        return (errors < tight_conf[quality].jpeg_threshold);
-    }
-    return (errors < tight_conf[compression].gradient_threshold);
-}
-
-/*
- * Code to determine how many different colors used in rectangle.
- */
-#define DEFINE_FILL_PALETTE_FUNCTION(bpp)                               \
-                                                                        \
-    static int                                                          \
-    tight_fill_palette##bpp(VncState *vs, int x, int y,                 \
-                            int max, size_t count,                      \
-                            uint32_t *bg, uint32_t *fg,                 \
-                            VncPalette **palette) {                     \
-        uint##bpp##_t *data;                                            \
-        uint##bpp##_t c0, c1, ci;                                       \
-        int i, n0, n1;                                                  \
-                                                                        \
-        data = (uint##bpp##_t *)vs->tight.tight.buffer;                 \
-                                                                        \
-        c0 = data[0];                                                   \
-        i = 1;                                                          \
-        while (i < count && data[i] == c0)                              \
-            i++;                                                        \
-        if (i >= count) {                                               \
-            *bg = *fg = c0;                                             \
-            return 1;                                                   \
-        }                                                               \
-                                                                        \
-        if (max < 2) {                                                  \
-            return 0;                                                   \
-        }                                                               \
-                                                                        \
-        n0 = i;                                                         \
-        c1 = data[i];                                                   \
-        n1 = 0;                                                         \
-        for (i++; i < count; i++) {                                     \
-            ci = data[i];                                               \
-            if (ci == c0) {                                             \
-                n0++;                                                   \
-            } else if (ci == c1) {                                      \
-                n1++;                                                   \
-            } else                                                      \
-                break;                                                  \
-        }                                                               \
-        if (i >= count) {                                               \
-            if (n0 > n1) {                                              \
-                *bg = (uint32_t)c0;                                     \
-                *fg = (uint32_t)c1;                                     \
-            } else {                                                    \
-                *bg = (uint32_t)c1;                                     \
-                *fg = (uint32_t)c0;                                     \
-            }                                                           \
-            return 2;                                                   \
-        }                                                               \
-                                                                        \
-        if (max == 2) {                                                 \
-            return 0;                                                   \
-        }                                                               \
-                                                                        \
-        *palette = palette_new(max, bpp);                               \
-        palette_put(*palette, c0);                                      \
-        palette_put(*palette, c1);                                      \
-        palette_put(*palette, ci);                                      \
-                                                                        \
-        for (i++; i < count; i++) {                                     \
-            if (data[i] == ci) {                                        \
-                continue;                                               \
-            } else {                                                    \
-                ci = data[i];                                           \
-                if (!palette_put(*palette, (uint32_t)ci)) {             \
-                    return 0;                                           \
-                }                                                       \
-            }                                                           \
-        }                                                               \
-                                                                        \
-        return palette_size(*palette);                                  \
-    }
-
-DEFINE_FILL_PALETTE_FUNCTION(8)
-DEFINE_FILL_PALETTE_FUNCTION(16)
-DEFINE_FILL_PALETTE_FUNCTION(32)
-
-static int tight_fill_palette(VncState *vs, int x, int y,
-                              size_t count, uint32_t *bg, uint32_t *fg,
-                              VncPalette **palette)
-{
-    int max;
-
-    max = count / tight_conf[vs->tight.compression].idx_max_colors_divisor;
-    if (max < 2 &&
-        count >= tight_conf[vs->tight.compression].mono_min_rect_size) {
-        max = 2;
-    }
-    if (max >= 256) {
-        max = 256;
-    }
-
-    switch (vs->client_pf.bytes_per_pixel) {
-    case 4:
-        return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
-    case 2:
-        return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
-    default:
-        max = 2;
-        return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
-    }
-    return 0;
-}
-
-/*
- * Converting truecolor samples into palette indices.
- */
-#define DEFINE_IDX_ENCODE_FUNCTION(bpp)                                 \
-                                                                        \
-    static void                                                         \
-    tight_encode_indexed_rect##bpp(uint8_t *buf, int count,             \
-                                   VncPalette *palette) {               \
-        uint##bpp##_t *src;                                             \
-        uint##bpp##_t rgb;                                              \
-        int i, rep;                                                     \
-        uint8_t idx;                                                    \
-                                                                        \
-        src = (uint##bpp##_t *) buf;                                    \
-                                                                        \
-        for (i = 0; i < count; i++) {                                   \
-                                                                        \
-            rgb = *src++;                                               \
-            rep = 0;                                                    \
-            while (i < count && *src == rgb) {                          \
-                rep++, src++, i++;                                      \
-            }                                                           \
-            idx = palette_idx(palette, rgb);                            \
-            /*                                                          \
-             * Should never happen, but don't break everything          \
-             * if it does, use the first color instead                  \
-             */                                                         \
-            if (idx == (uint8_t)-1) {                                   \
-                idx = 0;                                                \
-            }                                                           \
-            while (rep >= 0) {                                          \
-                *buf++ = idx;                                           \
-                rep--;                                                  \
-            }                                                           \
-        }                                                               \
-    }
-
-DEFINE_IDX_ENCODE_FUNCTION(16)
-DEFINE_IDX_ENCODE_FUNCTION(32)
-
-#define DEFINE_MONO_ENCODE_FUNCTION(bpp)                                \
-                                                                        \
-    static void                                                         \
-    tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h,             \
-                                uint##bpp##_t bg, uint##bpp##_t fg) {   \
-        uint##bpp##_t *ptr;                                             \
-        unsigned int value, mask;                                       \
-        int aligned_width;                                              \
-        int x, y, bg_bits;                                              \
-                                                                        \
-        ptr = (uint##bpp##_t *) buf;                                    \
-        aligned_width = w - w % 8;                                      \
-                                                                        \
-        for (y = 0; y < h; y++) {                                       \
-            for (x = 0; x < aligned_width; x += 8) {                    \
-                for (bg_bits = 0; bg_bits < 8; bg_bits++) {             \
-                    if (*ptr++ != bg) {                                 \
-                        break;                                          \
-                    }                                                   \
-                }                                                       \
-                if (bg_bits == 8) {                                     \
-                    *buf++ = 0;                                         \
-                    continue;                                           \
-                }                                                       \
-                mask = 0x80 >> bg_bits;                                 \
-                value = mask;                                           \
-                for (bg_bits++; bg_bits < 8; bg_bits++) {               \
-                    mask >>= 1;                                         \
-                    if (*ptr++ != bg) {                                 \
-                        value |= mask;                                  \
-                    }                                                   \
-                }                                                       \
-                *buf++ = (uint8_t)value;                                \
-            }                                                           \
-                                                                        \
-            mask = 0x80;                                                \
-            value = 0;                                                  \
-            if (x >= w) {                                               \
-                continue;                                               \
-            }                                                           \
-                                                                        \
-            for (; x < w; x++) {                                        \
-                if (*ptr++ != bg) {                                     \
-                    value |= mask;                                      \
-                }                                                       \
-                mask >>= 1;                                             \
-            }                                                           \
-            *buf++ = (uint8_t)value;                                    \
-        }                                                               \
-    }
-
-DEFINE_MONO_ENCODE_FUNCTION(8)
-DEFINE_MONO_ENCODE_FUNCTION(16)
-DEFINE_MONO_ENCODE_FUNCTION(32)
-
-/*
- * ``Gradient'' filter for 24-bit color samples.
- * Should be called only when redMax, greenMax and blueMax are 255.
- * Color components assumed to be byte-aligned.
- */
-
-static void
-tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h)
-{
-    uint32_t *buf32;
-    uint32_t pix32;
-    int shift[3];
-    int *prev;
-    int here[3], upper[3], left[3], upperleft[3];
-    int prediction;
-    int x, y, c;
-
-    buf32 = (uint32_t *)buf;
-    memset(vs->tight.gradient.buffer, 0, w * 3 * sizeof(int));
-
-    if (1 /* FIXME */) {
-        shift[0] = vs->client_pf.rshift;
-        shift[1] = vs->client_pf.gshift;
-        shift[2] = vs->client_pf.bshift;
-    } else {
-        shift[0] = 24 - vs->client_pf.rshift;
-        shift[1] = 24 - vs->client_pf.gshift;
-        shift[2] = 24 - vs->client_pf.bshift;
-    }
-
-    for (y = 0; y < h; y++) {
-        for (c = 0; c < 3; c++) {
-            upper[c] = 0;
-            here[c] = 0;
-        }
-        prev = (int *)vs->tight.gradient.buffer;
-        for (x = 0; x < w; x++) {
-            pix32 = *buf32++;
-            for (c = 0; c < 3; c++) {
-                upperleft[c] = upper[c];
-                left[c] = here[c];
-                upper[c] = *prev;
-                here[c] = (int)(pix32 >> shift[c] & 0xFF);
-                *prev++ = here[c];
-
-                prediction = left[c] + upper[c] - upperleft[c];
-                if (prediction < 0) {
-                    prediction = 0;
-                } else if (prediction > 0xFF) {
-                    prediction = 0xFF;
-                }
-                *buf++ = (char)(here[c] - prediction);
-            }
-        }
-    }
-}
-
-
-/*
- * ``Gradient'' filter for other color depths.
- */
-
-#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp)                            \
-                                                                        \
-    static void                                                         \
-    tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf,        \
-                               int w, int h) {                          \
-        uint##bpp##_t pix, diff;                                        \
-        bool endian;                                                    \
-        int *prev;                                                      \
-        int max[3], shift[3];                                           \
-        int here[3], upper[3], left[3], upperleft[3];                   \
-        int prediction;                                                 \
-        int x, y, c;                                                    \
-                                                                        \
-        memset (vs->tight.gradient.buffer, 0, w * 3 * sizeof(int));     \
-                                                                        \
-        endian = 0; /* FIXME */                                         \
-                                                                        \
-        max[0] = vs->client_pf.rmax;                                    \
-        max[1] = vs->client_pf.gmax;                                    \
-        max[2] = vs->client_pf.bmax;                                    \
-        shift[0] = vs->client_pf.rshift;                                \
-        shift[1] = vs->client_pf.gshift;                                \
-        shift[2] = vs->client_pf.bshift;                                \
-                                                                        \
-        for (y = 0; y < h; y++) {                                       \
-            for (c = 0; c < 3; c++) {                                   \
-                upper[c] = 0;                                           \
-                here[c] = 0;                                            \
-            }                                                           \
-            prev = (int *)vs->tight.gradient.buffer;                    \
-            for (x = 0; x < w; x++) {                                   \
-                pix = *buf;                                             \
-                if (endian) {                                           \
-                    pix = bswap##bpp(pix);                              \
-                }                                                       \
-                diff = 0;                                               \
-                for (c = 0; c < 3; c++) {                               \
-                    upperleft[c] = upper[c];                            \
-                    left[c] = here[c];                                  \
-                    upper[c] = *prev;                                   \
-                    here[c] = (int)(pix >> shift[c] & max[c]);          \
-                    *prev++ = here[c];                                  \
-                                                                        \
-                    prediction = left[c] + upper[c] - upperleft[c];     \
-                    if (prediction < 0) {                               \
-                        prediction = 0;                                 \
-                    } else if (prediction > max[c]) {                   \
-                        prediction = max[c];                            \
-                    }                                                   \
-                    diff |= ((here[c] - prediction) & max[c])           \
-                        << shift[c];                                    \
-                }                                                       \
-                if (endian) {                                           \
-                    diff = bswap##bpp(diff);                            \
-                }                                                       \
-                *buf++ = diff;                                          \
-            }                                                           \
-        }                                                               \
-    }
-
-DEFINE_GRADIENT_FILTER_FUNCTION(16)
-DEFINE_GRADIENT_FILTER_FUNCTION(32)
-
-/*
- * Check if a rectangle is all of the same color. If needSameColor is
- * set to non-zero, then also check that its color equals to the
- * *colorPtr value. The result is 1 if the test is successful, and in
- * that case new color will be stored in *colorPtr.
- */
-
-static bool
-check_solid_tile32(VncState *vs, int x, int y, int w, int h,
-                   uint32_t *color, bool samecolor)
-{
-    VncDisplay *vd = vs->vd;
-    uint32_t *fbptr;
-    uint32_t c;
-    int dx, dy;
-
-    fbptr = vnc_server_fb_ptr(vd, x, y);
-
-    c = *fbptr;
-    if (samecolor && (uint32_t)c != *color) {
-        return false;
-    }
-
-    for (dy = 0; dy < h; dy++) {
-        for (dx = 0; dx < w; dx++) {
-            if (c != fbptr[dx]) {
-                return false;
-            }
-        }
-        fbptr = (uint32_t *)
-            ((uint8_t *)fbptr + vnc_server_fb_stride(vd));
-    }
-
-    *color = (uint32_t)c;
-    return true;
-}
-
-static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
-                             uint32_t* color, bool samecolor)
-{
-    switch (VNC_SERVER_FB_BYTES) {
-    case 4:
-        return check_solid_tile32(vs, x, y, w, h, color, samecolor);
-    }
-}
-
-static void find_best_solid_area(VncState *vs, int x, int y, int w, int h,
-                                 uint32_t color, int *w_ptr, int *h_ptr)
-{
-    int dx, dy, dw, dh;
-    int w_prev;
-    int w_best = 0, h_best = 0;
-
-    w_prev = w;
-
-    for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
-
-        dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy);
-        dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev);
-
-        if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) {
-            break;
-        }
-
-        for (dx = x + dw; dx < x + w_prev;) {
-            dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx);
-
-            if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) {
-                break;
-            }
-            dx += dw;
-        }
-
-        w_prev = dx - x;
-        if (w_prev * (dy + dh - y) > w_best * h_best) {
-            w_best = w_prev;
-            h_best = dy + dh - y;
-        }
-    }
-
-    *w_ptr = w_best;
-    *h_ptr = h_best;
-}
-
-static void extend_solid_area(VncState *vs, int x, int y, int w, int h,
-                              uint32_t color, int *x_ptr, int *y_ptr,
-                              int *w_ptr, int *h_ptr)
-{
-    int cx, cy;
-
-    /* Try to extend the area upwards. */
-    for ( cy = *y_ptr - 1;
-          cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
-          cy-- );
-    *h_ptr += *y_ptr - (cy + 1);
-    *y_ptr = cy + 1;
-
-    /* ... downwards. */
-    for ( cy = *y_ptr + *h_ptr;
-          cy < y + h &&
-              check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
-          cy++ );
-    *h_ptr += cy - (*y_ptr + *h_ptr);
-
-    /* ... to the left. */
-    for ( cx = *x_ptr - 1;
-          cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
-          cx-- );
-    *w_ptr += *x_ptr - (cx + 1);
-    *x_ptr = cx + 1;
-
-    /* ... to the right. */
-    for ( cx = *x_ptr + *w_ptr;
-          cx < x + w &&
-              check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
-          cx++ );
-    *w_ptr += cx - (*x_ptr + *w_ptr);
-}
-
-static int tight_init_stream(VncState *vs, int stream_id,
-                             int level, int strategy)
-{
-    z_streamp zstream = &vs->tight.stream[stream_id];
-
-    if (zstream->opaque == NULL) {
-        int err;
-
-        VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
-        VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
-        zstream->zalloc = vnc_zlib_zalloc;
-        zstream->zfree = vnc_zlib_zfree;
-
-        err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
-                           MAX_MEM_LEVEL, strategy);
-
-        if (err != Z_OK) {
-            fprintf(stderr, "VNC: error initializing zlib\n");
-            return -1;
-        }
-
-        vs->tight.levels[stream_id] = level;
-        zstream->opaque = vs;
-    }
-
-    if (vs->tight.levels[stream_id] != level) {
-        if (deflateParams(zstream, level, strategy) != Z_OK) {
-            return -1;
-        }
-        vs->tight.levels[stream_id] = level;
-    }
-    return 0;
-}
-
-static void tight_send_compact_size(VncState *vs, size_t len)
-{
-    int lpc = 0;
-    int bytes = 0;
-    char buf[3] = {0, 0, 0};
-
-    buf[bytes++] = len & 0x7F;
-    if (len > 0x7F) {
-        buf[bytes-1] |= 0x80;
-        buf[bytes++] = (len >> 7) & 0x7F;
-        if (len > 0x3FFF) {
-            buf[bytes-1] |= 0x80;
-            buf[bytes++] = (len >> 14) & 0xFF;
-        }
-    }
-    for (lpc = 0; lpc < bytes; lpc++) {
-        vnc_write_u8(vs, buf[lpc]);
-    }
-}
-
-static int tight_compress_data(VncState *vs, int stream_id, size_t bytes,
-                               int level, int strategy)
-{
-    z_streamp zstream = &vs->tight.stream[stream_id];
-    int previous_out;
-
-    if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
-        vnc_write(vs, vs->tight.tight.buffer, vs->tight.tight.offset);
-        return bytes;
-    }
-
-    if (tight_init_stream(vs, stream_id, level, strategy)) {
-        return -1;
-    }
-
-    /* reserve memory in output buffer */
-    buffer_reserve(&vs->tight.zlib, bytes + 64);
-
-    /* set pointers */
-    zstream->next_in = vs->tight.tight.buffer;
-    zstream->avail_in = vs->tight.tight.offset;
-    zstream->next_out = vs->tight.zlib.buffer + vs->tight.zlib.offset;
-    zstream->avail_out = vs->tight.zlib.capacity - vs->tight.zlib.offset;
-    previous_out = zstream->avail_out;
-    zstream->data_type = Z_BINARY;
-
-    /* start encoding */
-    if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
-        fprintf(stderr, "VNC: error during tight compression\n");
-        return -1;
-    }
-
-    vs->tight.zlib.offset = vs->tight.zlib.capacity - zstream->avail_out;
-    /* ...how much data has actually been produced by deflate() */
-    bytes = previous_out - zstream->avail_out;
-
-    tight_send_compact_size(vs, bytes);
-    vnc_write(vs, vs->tight.zlib.buffer, bytes);
-
-    buffer_reset(&vs->tight.zlib);
-
-    return bytes;
-}
-
-/*
- * Subencoding implementations.
- */
-static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret)
-{
-    uint32_t *buf32;
-    uint32_t pix;
-    int rshift, gshift, bshift;
-
-    buf32 = (uint32_t *)buf;
-
-    if (1 /* FIXME */) {
-        rshift = vs->client_pf.rshift;
-        gshift = vs->client_pf.gshift;
-        bshift = vs->client_pf.bshift;
-    } else {
-        rshift = 24 - vs->client_pf.rshift;
-        gshift = 24 - vs->client_pf.gshift;
-        bshift = 24 - vs->client_pf.bshift;
-    }
-
-    if (ret) {
-        *ret = count * 3;
-    }
-
-    while (count--) {
-        pix = *buf32++;
-        *buf++ = (char)(pix >> rshift);
-        *buf++ = (char)(pix >> gshift);
-        *buf++ = (char)(pix >> bshift);
-    }
-}
-
-static int send_full_color_rect(VncState *vs, int x, int y, int w, int h)
-{
-    int stream = 0;
-    ssize_t bytes;
-
-#ifdef CONFIG_VNC_PNG
-    if (tight_can_send_png_rect(vs, w, h)) {
-        return send_png_rect(vs, x, y, w, h, NULL);
-    }
-#endif
-
-    vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
-
-    if (vs->tight.pixel24) {
-        tight_pack24(vs, vs->tight.tight.buffer, w * h, &vs->tight.tight.offset);
-        bytes = 3;
-    } else {
-        bytes = vs->client_pf.bytes_per_pixel;
-    }
-
-    bytes = tight_compress_data(vs, stream, w * h * bytes,
-                                tight_conf[vs->tight.compression].raw_zlib_level,
-                                Z_DEFAULT_STRATEGY);
-
-    return (bytes >= 0);
-}
-
-static int send_solid_rect(VncState *vs)
-{
-    size_t bytes;
-
-    vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */
-
-    if (vs->tight.pixel24) {
-        tight_pack24(vs, vs->tight.tight.buffer, 1, &vs->tight.tight.offset);
-        bytes = 3;
-    } else {
-        bytes = vs->client_pf.bytes_per_pixel;
-    }
-
-    vnc_write(vs, vs->tight.tight.buffer, bytes);
-    return 1;
-}
-
-static int send_mono_rect(VncState *vs, int x, int y,
-                          int w, int h, uint32_t bg, uint32_t fg)
-{
-    ssize_t bytes;
-    int stream = 1;
-    int level = tight_conf[vs->tight.compression].mono_zlib_level;
-
-#ifdef CONFIG_VNC_PNG
-    if (tight_can_send_png_rect(vs, w, h)) {
-        int ret;
-        int bpp = vs->client_pf.bytes_per_pixel * 8;
-        VncPalette *palette = palette_new(2, bpp);
-
-        palette_put(palette, bg);
-        palette_put(palette, fg);
-        ret = send_png_rect(vs, x, y, w, h, palette);
-        palette_destroy(palette);
-        return ret;
-    }
-#endif
-
-    bytes = ((w + 7) / 8) * h;
-
-    vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
-    vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
-    vnc_write_u8(vs, 1);
-
-    switch (vs->client_pf.bytes_per_pixel) {
-    case 4:
-    {
-        uint32_t buf[2] = {bg, fg};
-        size_t ret = sizeof (buf);
-
-        if (vs->tight.pixel24) {
-            tight_pack24(vs, (unsigned char*)buf, 2, &ret);
-        }
-        vnc_write(vs, buf, ret);
-
-        tight_encode_mono_rect32(vs->tight.tight.buffer, w, h, bg, fg);
-        break;
-    }
-    case 2:
-        vnc_write(vs, &bg, 2);
-        vnc_write(vs, &fg, 2);
-        tight_encode_mono_rect16(vs->tight.tight.buffer, w, h, bg, fg);
-        break;
-    default:
-        vnc_write_u8(vs, bg);
-        vnc_write_u8(vs, fg);
-        tight_encode_mono_rect8(vs->tight.tight.buffer, w, h, bg, fg);
-        break;
-    }
-    vs->tight.tight.offset = bytes;
-
-    bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY);
-    return (bytes >= 0);
-}
-
-struct palette_cb_priv {
-    VncState *vs;
-    uint8_t *header;
-#ifdef CONFIG_VNC_PNG
-    png_colorp png_palette;
-#endif
-};
-
-static void write_palette(int idx, uint32_t color, void *opaque)
-{
-    struct palette_cb_priv *priv = opaque;
-    VncState *vs = priv->vs;
-    uint32_t bytes = vs->client_pf.bytes_per_pixel;
-
-    if (bytes == 4) {
-        ((uint32_t*)priv->header)[idx] = color;
-    } else {
-        ((uint16_t*)priv->header)[idx] = color;
-    }
-}
-
-static bool send_gradient_rect(VncState *vs, int x, int y, int w, int h)
-{
-    int stream = 3;
-    int level = tight_conf[vs->tight.compression].gradient_zlib_level;
-    ssize_t bytes;
-
-    if (vs->client_pf.bytes_per_pixel == 1) {
-        return send_full_color_rect(vs, x, y, w, h);
-    }
-
-    vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
-    vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT);
-
-    buffer_reserve(&vs->tight.gradient, w * 3 * sizeof (int));
-
-    if (vs->tight.pixel24) {
-        tight_filter_gradient24(vs, vs->tight.tight.buffer, w, h);
-        bytes = 3;
-    } else if (vs->client_pf.bytes_per_pixel == 4) {
-        tight_filter_gradient32(vs, (uint32_t *)vs->tight.tight.buffer, w, h);
-        bytes = 4;
-    } else {
-        tight_filter_gradient16(vs, (uint16_t *)vs->tight.tight.buffer, w, h);
-        bytes = 2;
-    }
-
-    buffer_reset(&vs->tight.gradient);
-
-    bytes = w * h * bytes;
-    vs->tight.tight.offset = bytes;
-
-    bytes = tight_compress_data(vs, stream, bytes,
-                                level, Z_FILTERED);
-    return (bytes >= 0);
-}
-
-static int send_palette_rect(VncState *vs, int x, int y,
-                             int w, int h, VncPalette *palette)
-{
-    int stream = 2;
-    int level = tight_conf[vs->tight.compression].idx_zlib_level;
-    int colors;
-    ssize_t bytes;
-
-#ifdef CONFIG_VNC_PNG
-    if (tight_can_send_png_rect(vs, w, h)) {
-        return send_png_rect(vs, x, y, w, h, palette);
-    }
-#endif
-
-    colors = palette_size(palette);
-
-    vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
-    vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
-    vnc_write_u8(vs, colors - 1);
-
-    switch (vs->client_pf.bytes_per_pixel) {
-    case 4:
-    {
-        size_t old_offset, offset;
-        uint32_t header[palette_size(palette)];
-        struct palette_cb_priv priv = { vs, (uint8_t *)header };
-
-        old_offset = vs->output.offset;
-        palette_iter(palette, write_palette, &priv);
-        vnc_write(vs, header, sizeof(header));
-
-        if (vs->tight.pixel24) {
-            tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset);
-            vs->output.offset = old_offset + offset;
-        }
-
-        tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
-        break;
-    }
-    case 2:
-    {
-        uint16_t header[palette_size(palette)];
-        struct palette_cb_priv priv = { vs, (uint8_t *)header };
-
-        palette_iter(palette, write_palette, &priv);
-        vnc_write(vs, header, sizeof(header));
-        tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
-        break;
-    }
-    default:
-        return -1; /* No palette for 8bits colors */
-        break;
-    }
-    bytes = w * h;
-    vs->tight.tight.offset = bytes;
-
-    bytes = tight_compress_data(vs, stream, bytes,
-                                level, Z_DEFAULT_STRATEGY);
-    return (bytes >= 0);
-}
-
-/*
- * JPEG compression stuff.
- */
-#ifdef CONFIG_VNC_JPEG
-/*
- * Destination manager implementation for JPEG library.
- */
-
-/* This is called once per encoding */
-static void jpeg_init_destination(j_compress_ptr cinfo)
-{
-    VncState *vs = cinfo->client_data;
-    Buffer *buffer = &vs->tight.jpeg;
-
-    cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset;
-    cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset);
-}
-
-/* This is called when we ran out of buffer (shouldn't happen!) */
-static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
-{
-    VncState *vs = cinfo->client_data;
-    Buffer *buffer = &vs->tight.jpeg;
-
-    buffer->offset = buffer->capacity;
-    buffer_reserve(buffer, 2048);
-    jpeg_init_destination(cinfo);
-    return TRUE;
-}
-
-/* This is called when we are done processing data */
-static void jpeg_term_destination(j_compress_ptr cinfo)
-{
-    VncState *vs = cinfo->client_data;
-    Buffer *buffer = &vs->tight.jpeg;
-
-    buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer;
-}
-
-static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
-{
-    struct jpeg_compress_struct cinfo;
-    struct jpeg_error_mgr jerr;
-    struct jpeg_destination_mgr manager;
-    pixman_image_t *linebuf;
-    JSAMPROW row[1];
-    uint8_t *buf;
-    int dy;
-
-    if (surface_bytes_per_pixel(vs->vd->ds) == 1) {
-        return send_full_color_rect(vs, x, y, w, h);
-    }
-
-    buffer_reserve(&vs->tight.jpeg, 2048);
-
-    cinfo.err = jpeg_std_error(&jerr);
-    jpeg_create_compress(&cinfo);
-
-    cinfo.client_data = vs;
-    cinfo.image_width = w;
-    cinfo.image_height = h;
-    cinfo.input_components = 3;
-    cinfo.in_color_space = JCS_RGB;
-
-    jpeg_set_defaults(&cinfo);
-    jpeg_set_quality(&cinfo, quality, true);
-
-    manager.init_destination = jpeg_init_destination;
-    manager.empty_output_buffer = jpeg_empty_output_buffer;
-    manager.term_destination = jpeg_term_destination;
-    cinfo.dest = &manager;
-
-    jpeg_start_compress(&cinfo, true);
-
-    linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w);
-    buf = (uint8_t *)pixman_image_get_data(linebuf);
-    row[0] = buf;
-    for (dy = 0; dy < h; dy++) {
-        qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy);
-        jpeg_write_scanlines(&cinfo, row, 1);
-    }
-    qemu_pixman_image_unref(linebuf);
-
-    jpeg_finish_compress(&cinfo);
-    jpeg_destroy_compress(&cinfo);
-
-    vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
-
-    tight_send_compact_size(vs, vs->tight.jpeg.offset);
-    vnc_write(vs, vs->tight.jpeg.buffer, vs->tight.jpeg.offset);
-    buffer_reset(&vs->tight.jpeg);
-
-    return 1;
-}
-#endif /* CONFIG_VNC_JPEG */
-
-/*
- * PNG compression stuff.
- */
-#ifdef CONFIG_VNC_PNG
-static void write_png_palette(int idx, uint32_t pix, void *opaque)
-{
-    struct palette_cb_priv *priv = opaque;
-    VncState *vs = priv->vs;
-    png_colorp color = &priv->png_palette[idx];
-
-    if (vs->tight.pixel24)
-    {
-        color->red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax;
-        color->green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax;
-        color->blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax;
-    }
-    else
-    {
-        int red, green, blue;
-
-        red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax;
-        green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax;
-        blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax;
-        color->red = ((red * 255 + vs->client_pf.rmax / 2) /
-                      vs->client_pf.rmax);
-        color->green = ((green * 255 + vs->client_pf.gmax / 2) /
-                        vs->client_pf.gmax);
-        color->blue = ((blue * 255 + vs->client_pf.bmax / 2) /
-                       vs->client_pf.bmax);
-    }
-}
-
-static void png_write_data(png_structp png_ptr, png_bytep data,
-                           png_size_t length)
-{
-    VncState *vs = png_get_io_ptr(png_ptr);
-
-    buffer_reserve(&vs->tight.png, vs->tight.png.offset + length);
-    memcpy(vs->tight.png.buffer + vs->tight.png.offset, data, length);
-
-    vs->tight.png.offset += length;
-}
-
-static void png_flush_data(png_structp png_ptr)
-{
-}
-
-static void *vnc_png_malloc(png_structp png_ptr, png_size_t size)
-{
-    return g_malloc(size);
-}
-
-static void vnc_png_free(png_structp png_ptr, png_voidp ptr)
-{
-    g_free(ptr);
-}
-
-static int send_png_rect(VncState *vs, int x, int y, int w, int h,
-                         VncPalette *palette)
-{
-    png_byte color_type;
-    png_structp png_ptr;
-    png_infop info_ptr;
-    png_colorp png_palette = NULL;
-    pixman_image_t *linebuf;
-    int level = tight_png_conf[vs->tight.compression].png_zlib_level;
-    int filters = tight_png_conf[vs->tight.compression].png_filters;
-    uint8_t *buf;
-    int dy;
-
-    png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL,
-                                        NULL, vnc_png_malloc, vnc_png_free);
-
-    if (png_ptr == NULL)
-        return -1;
-
-    info_ptr = png_create_info_struct(png_ptr);
-
-    if (info_ptr == NULL) {
-        png_destroy_write_struct(&png_ptr, NULL);
-        return -1;
-    }
-
-    png_set_write_fn(png_ptr, (void *) vs, png_write_data, png_flush_data);
-    png_set_compression_level(png_ptr, level);
-    png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters);
-
-    if (palette) {
-        color_type = PNG_COLOR_TYPE_PALETTE;
-    } else {
-        color_type = PNG_COLOR_TYPE_RGB;
-    }
-
-    png_set_IHDR(png_ptr, info_ptr, w, h,
-                 8, color_type, PNG_INTERLACE_NONE,
-                 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
-
-    if (color_type == PNG_COLOR_TYPE_PALETTE) {
-        struct palette_cb_priv priv;
-
-        png_palette = png_malloc(png_ptr, sizeof(*png_palette) *
-                                 palette_size(palette));
-
-        priv.vs = vs;
-        priv.png_palette = png_palette;
-        palette_iter(palette, write_png_palette, &priv);
-
-        png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette));
-
-        if (vs->client_pf.bytes_per_pixel == 4) {
-            tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
-        } else {
-            tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
-        }
-    }
-
-    png_write_info(png_ptr, info_ptr);
-
-    buffer_reserve(&vs->tight.png, 2048);
-    linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w);
-    buf = (uint8_t *)pixman_image_get_data(linebuf);
-    for (dy = 0; dy < h; dy++)
-    {
-        if (color_type == PNG_COLOR_TYPE_PALETTE) {
-            memcpy(buf, vs->tight.tight.buffer + (dy * w), w);
-        } else {
-            qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy);
-        }
-        png_write_row(png_ptr, buf);
-    }
-    qemu_pixman_image_unref(linebuf);
-
-    png_write_end(png_ptr, NULL);
-
-    if (color_type == PNG_COLOR_TYPE_PALETTE) {
-        png_free(png_ptr, png_palette);
-    }
-
-    png_destroy_write_struct(&png_ptr, &info_ptr);
-
-    vnc_write_u8(vs, VNC_TIGHT_PNG << 4);
-
-    tight_send_compact_size(vs, vs->tight.png.offset);
-    vnc_write(vs, vs->tight.png.buffer, vs->tight.png.offset);
-    buffer_reset(&vs->tight.png);
-    return 1;
-}
-#endif /* CONFIG_VNC_PNG */
-
-static void vnc_tight_start(VncState *vs)
-{
-    buffer_reset(&vs->tight.tight);
-
-    // make the output buffer be the zlib buffer, so we can compress it later
-    vs->tight.tmp = vs->output;
-    vs->output = vs->tight.tight;
-}
-
-static void vnc_tight_stop(VncState *vs)
-{
-    // switch back to normal output/zlib buffers
-    vs->tight.tight = vs->output;
-    vs->output = vs->tight.tmp;
-}
-
-static int send_sub_rect_nojpeg(VncState *vs, int x, int y, int w, int h,
-                                int bg, int fg, int colors, VncPalette *palette)
-{
-    int ret;
-
-    if (colors == 0) {
-        if (tight_detect_smooth_image(vs, w, h)) {
-            ret = send_gradient_rect(vs, x, y, w, h);
-        } else {
-            ret = send_full_color_rect(vs, x, y, w, h);
-        }
-    } else if (colors == 1) {
-        ret = send_solid_rect(vs);
-    } else if (colors == 2) {
-        ret = send_mono_rect(vs, x, y, w, h, bg, fg);
-    } else if (colors <= 256) {
-        ret = send_palette_rect(vs, x, y, w, h, palette);
-    } else {
-        ret = 0;
-    }
-    return ret;
-}
-
-#ifdef CONFIG_VNC_JPEG
-static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h,
-                              int bg, int fg, int colors,
-                              VncPalette *palette, bool force)
-{
-    int ret;
-
-    if (colors == 0) {
-        if (force || (tight_jpeg_conf[vs->tight.quality].jpeg_full &&
-                      tight_detect_smooth_image(vs, w, h))) {
-            int quality = tight_conf[vs->tight.quality].jpeg_quality;
-
-            ret = send_jpeg_rect(vs, x, y, w, h, quality);
-        } else {
-            ret = send_full_color_rect(vs, x, y, w, h);
-        }
-    } else if (colors == 1) {
-        ret = send_solid_rect(vs);
-    } else if (colors == 2) {
-        ret = send_mono_rect(vs, x, y, w, h, bg, fg);
-    } else if (colors <= 256) {
-        if (force || (colors > 96 &&
-                      tight_jpeg_conf[vs->tight.quality].jpeg_idx &&
-                      tight_detect_smooth_image(vs, w, h))) {
-            int quality = tight_conf[vs->tight.quality].jpeg_quality;
-
-            ret = send_jpeg_rect(vs, x, y, w, h, quality);
-        } else {
-            ret = send_palette_rect(vs, x, y, w, h, palette);
-        }
-    } else {
-        ret = 0;
-    }
-    return ret;
-}
-#endif
-
-static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
-{
-    VncPalette *palette = NULL;
-    uint32_t bg = 0, fg = 0;
-    int colors;
-    int ret = 0;
-#ifdef CONFIG_VNC_JPEG
-    bool force_jpeg = false;
-    bool allow_jpeg = true;
-#endif
-
-    vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
-
-    vnc_tight_start(vs);
-    vnc_raw_send_framebuffer_update(vs, x, y, w, h);
-    vnc_tight_stop(vs);
-
-#ifdef CONFIG_VNC_JPEG
-    if (!vs->vd->non_adaptive && vs->tight.quality != (uint8_t)-1) {
-        double freq = vnc_update_freq(vs, x, y, w, h);
-
-        if (freq < tight_jpeg_conf[vs->tight.quality].jpeg_freq_min) {
-            allow_jpeg = false;
-        }
-        if (freq >= tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
-            force_jpeg = true;
-            vnc_sent_lossy_rect(vs, x, y, w, h);
-        }
-    }
-#endif
-
-    colors = tight_fill_palette(vs, x, y, w * h, &bg, &fg, &palette);
-
-#ifdef CONFIG_VNC_JPEG
-    if (allow_jpeg && vs->tight.quality != (uint8_t)-1) {
-        ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, palette,
-                                 force_jpeg);
-    } else {
-        ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
-    }
-#else
-    ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
-#endif
-
-    palette_destroy(palette);
-    return ret;
-}
-
-static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h)
-{
-    vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
-
-    vnc_tight_start(vs);
-    vnc_raw_send_framebuffer_update(vs, x, y, w, h);
-    vnc_tight_stop(vs);
-
-    return send_solid_rect(vs);
-}
-
-static int send_rect_simple(VncState *vs, int x, int y, int w, int h,
-                            bool split)
-{
-    int max_size, max_width;
-    int max_sub_width, max_sub_height;
-    int dx, dy;
-    int rw, rh;
-    int n = 0;
-
-    max_size = tight_conf[vs->tight.compression].max_rect_size;
-    max_width = tight_conf[vs->tight.compression].max_rect_width;
-
-    if (split && (w > max_width || w * h > max_size)) {
-        max_sub_width = (w > max_width) ? max_width : w;
-        max_sub_height = max_size / max_sub_width;
-
-        for (dy = 0; dy < h; dy += max_sub_height) {
-            for (dx = 0; dx < w; dx += max_width) {
-                rw = MIN(max_sub_width, w - dx);
-                rh = MIN(max_sub_height, h - dy);
-                n += send_sub_rect(vs, x+dx, y+dy, rw, rh);
-            }
-        }
-    } else {
-        n += send_sub_rect(vs, x, y, w, h);
-    }
-
-    return n;
-}
-
-static int find_large_solid_color_rect(VncState *vs, int x, int y,
-                                       int w, int h, int max_rows)
-{
-    int dx, dy, dw, dh;
-    int n = 0;
-
-    /* Try to find large solid-color areas and send them separately. */
-
-    for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
-
-        /* If a rectangle becomes too large, send its upper part now. */
-
-        if (dy - y >= max_rows) {
-            n += send_rect_simple(vs, x, y, w, max_rows, true);
-            y += max_rows;
-            h -= max_rows;
-        }
-
-        dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy));
-
-        for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
-            uint32_t color_value;
-            int x_best, y_best, w_best, h_best;
-
-            dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx));
-
-            if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) {
-                continue ;
-            }
-
-            /* Get dimensions of solid-color area. */
-
-            find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y),
-                                 color_value, &w_best, &h_best);
-
-            /* Make sure a solid rectangle is large enough
-               (or the whole rectangle is of the same color). */
-
-            if (w_best * h_best != w * h &&
-                w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
-                continue;
-            }
-
-            /* Try to extend solid rectangle to maximum size. */
-
-            x_best = dx; y_best = dy;
-            extend_solid_area(vs, x, y, w, h, color_value,
-                              &x_best, &y_best, &w_best, &h_best);
-
-            /* Send rectangles at top and left to solid-color area. */
-
-            if (y_best != y) {
-                n += send_rect_simple(vs, x, y, w, y_best-y, true);
-            }
-            if (x_best != x) {
-                n += tight_send_framebuffer_update(vs, x, y_best,
-                                                   x_best-x, h_best);
-            }
-
-            /* Send solid-color rectangle. */
-            n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best);
-
-            /* Send remaining rectangles (at right and bottom). */
-
-            if (x_best + w_best != x + w) {
-                n += tight_send_framebuffer_update(vs, x_best+w_best,
-                                                   y_best,
-                                                   w-(x_best-x)-w_best,
-                                                   h_best);
-            }
-            if (y_best + h_best != y + h) {
-                n += tight_send_framebuffer_update(vs, x, y_best+h_best,
-                                                   w, h-(y_best-y)-h_best);
-            }
-
-            /* Return after all recursive calls are done. */
-            return n;
-        }
-    }
-    return n + send_rect_simple(vs, x, y, w, h, true);
-}
-
-static int tight_send_framebuffer_update(VncState *vs, int x, int y,
-                                         int w, int h)
-{
-    int max_rows;
-
-    if (vs->client_pf.bytes_per_pixel == 4 && vs->client_pf.rmax == 0xFF &&
-        vs->client_pf.bmax == 0xFF && vs->client_pf.gmax == 0xFF) {
-        vs->tight.pixel24 = true;
-    } else {
-        vs->tight.pixel24 = false;
-    }
-
-#ifdef CONFIG_VNC_JPEG
-    if (vs->tight.quality != (uint8_t)-1) {
-        double freq = vnc_update_freq(vs, x, y, w, h);
-
-        if (freq > tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
-            return send_rect_simple(vs, x, y, w, h, false);
-        }
-    }
-#endif
-
-    if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) {
-        return send_rect_simple(vs, x, y, w, h, true);
-    }
-
-    /* Calculate maximum number of rows in one non-solid rectangle. */
-
-    max_rows = tight_conf[vs->tight.compression].max_rect_size;
-    max_rows /= MIN(tight_conf[vs->tight.compression].max_rect_width, w);
-
-    return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
-}
-
-int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
-                                      int w, int h)
-{
-    vs->tight.type = VNC_ENCODING_TIGHT;
-    return tight_send_framebuffer_update(vs, x, y, w, h);
-}
-
-int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
-                                          int w, int h)
-{
-    vs->tight.type = VNC_ENCODING_TIGHT_PNG;
-    return tight_send_framebuffer_update(vs, x, y, w, h);
-}
-
-void vnc_tight_clear(VncState *vs)
-{
-    int i;
-    for (i=0; i<ARRAY_SIZE(vs->tight.stream); i++) {
-        if (vs->tight.stream[i].opaque) {
-            deflateEnd(&vs->tight.stream[i]);
-        }
-    }
-
-    buffer_free(&vs->tight.tight);
-    buffer_free(&vs->tight.zlib);
-    buffer_free(&vs->tight.gradient);
-#ifdef CONFIG_VNC_JPEG
-    buffer_free(&vs->tight.jpeg);
-#endif
-#ifdef CONFIG_VNC_PNG
-    buffer_free(&vs->tight.png);
-#endif
-}