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diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
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+/*
+ * 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-common.h"
+
+#ifdef CONFIG_VNC_JPEG
+#include <stdio.h>
+#include <jpeglib.h>
+#endif
+
+#include "bswap.h"
+#include "qdict.h"
+#include "qint.h"
+#include "vnc.h"
+#include "vnc-enc-tight.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 }
+};
+
+/*
+ * Code to guess if given rectangle is suitable for smooth image
+ * compression (by applying "gradient" filter or JPEG coder).
+ */
+
+static uint
+tight_detect_smooth_image24(VncState *vs, int w, int h)
+{
+ int off;
+ int x, y, d, dx;
+ uint c;
+ uint stats[256];
+ int pixels = 0;
+ int pix, left[3];
+ uint errors;
+ unsigned char *buf = vs->tight.buffer;
+
+ /*
+ * If client is big-endian, color samples begin from the second
+ * byte (offset 1) of a 32-bit pixel value.
+ */
+ off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG);
+
+ 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;
+ }
+ }
+
+ /* 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 uint \
+ 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; \
+ uint c; \
+ uint stats[256]; \
+ int pixels = 0; \
+ int sample, sum, left[3]; \
+ uint errors; \
+ unsigned char *buf = vs->tight.buffer; \
+ \
+ endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
+ \
+ \
+ max[0] = vs->clientds.pf.rmax; \
+ max[1] = vs->clientds.pf.gmax; \
+ max[2] = vs->clientds.pf.bmax; \
+ shift[0] = vs->clientds.pf.rshift; \
+ shift[1] = vs->clientds.pf.gshift; \
+ shift[2] = vs->clientds.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 ((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)
+{
+ uint errors;
+ int compression = vs->tight_compression;
+ int quality = vs->tight_quality;
+
+ if (!vs->vd->lossy) {
+ return 0;
+ }
+
+ if (ds_get_bytes_per_pixel(vs->ds) == 1 ||
+ vs->clientds.pf.bytes_per_pixel == 1 ||
+ w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
+ return 0;
+ }
+
+ if (vs->tight_quality != -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->clientds.pf.bytes_per_pixel == 4) {
+ if (vs->tight_pixel24) {
+ errors = tight_detect_smooth_image24(vs, w, h);
+ if (vs->tight_quality != -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 != -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.
+ */
+
+static void tight_palette_rgb2buf(uint32_t rgb, int bpp, uint8_t buf[6])
+{
+ memset(buf, 0, 6);
+
+ if (bpp == 32) {
+ buf[0] = ((rgb >> 24) & 0xFF);
+ buf[1] = ((rgb >> 16) & 0xFF);
+ buf[2] = ((rgb >> 8) & 0xFF);
+ buf[3] = ((rgb >> 0) & 0xFF);
+ buf[4] = ((buf[0] & 1) == 0) << 3 | ((buf[1] & 1) == 0) << 2;
+ buf[4]|= ((buf[2] & 1) == 0) << 1 | ((buf[3] & 1) == 0) << 0;
+ buf[0] |= 1;
+ buf[1] |= 1;
+ buf[2] |= 1;
+ buf[3] |= 1;
+ }
+ if (bpp == 16) {
+ buf[0] = ((rgb >> 8) & 0xFF);
+ buf[1] = ((rgb >> 0) & 0xFF);
+ buf[2] = ((buf[0] & 1) == 0) << 1 | ((buf[1] & 1) == 0) << 0;
+ buf[0] |= 1;
+ buf[1] |= 1;
+ }
+}
+
+static uint32_t tight_palette_buf2rgb(int bpp, const uint8_t *buf)
+{
+ uint32_t rgb = 0;
+
+ if (bpp == 32) {
+ rgb |= ((buf[0] & ~1) | !((buf[4] >> 3) & 1)) << 24;
+ rgb |= ((buf[1] & ~1) | !((buf[4] >> 2) & 1)) << 16;
+ rgb |= ((buf[2] & ~1) | !((buf[4] >> 1) & 1)) << 8;
+ rgb |= ((buf[3] & ~1) | !((buf[4] >> 0) & 1)) << 0;
+ }
+ if (bpp == 16) {
+ rgb |= ((buf[0] & ~1) | !((buf[2] >> 1) & 1)) << 8;
+ rgb |= ((buf[1] & ~1) | !((buf[2] >> 0) & 1)) << 0;
+ }
+ return rgb;
+}
+
+
+static int tight_palette_insert(QDict *palette, uint32_t rgb, int bpp, int max)
+{
+ uint8_t key[6];
+ int idx = qdict_size(palette);
+ bool present;
+
+ tight_palette_rgb2buf(rgb, bpp, key);
+ present = qdict_haskey(palette, (char *)key);
+ if (idx >= max && !present) {
+ return 0;
+ }
+ if (!present) {
+ qdict_put(palette, (char *)key, qint_from_int(idx));
+ }
+ return qdict_size(palette);
+}
+
+#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, \
+ struct QDict **palette) { \
+ uint##bpp##_t *data; \
+ uint##bpp##_t c0, c1, ci; \
+ int i, n0, n1; \
+ \
+ data = (uint##bpp##_t *)vs->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 = qdict_new(); \
+ tight_palette_insert(*palette, c0, bpp, max); \
+ tight_palette_insert(*palette, c1, bpp, max); \
+ tight_palette_insert(*palette, ci, bpp, max); \
+ \
+ for (i++; i < count; i++) { \
+ if (data[i] == ci) { \
+ continue; \
+ } else { \
+ if (!tight_palette_insert(*palette, (uint32_t)ci, \
+ bpp, max)) { \
+ return 0; \
+ } \
+ ci = data[i]; \
+ } \
+ } \
+ \
+ return qdict_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,
+ struct QDict **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->clientds.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;
+}
+
+/* Callback to dump a palette with qdict_iter
+static void print_palette(const char *key, QObject *obj, void *opaque)
+{
+ uint8_t idx = qint_get_int(qobject_to_qint(obj));
+ uint32_t rgb = tight_palette_buf2rgb(32, (uint8_t *)key);
+
+ fprintf(stderr, "%.2x ", (unsigned char)*key);
+ while (*key++)
+ fprintf(stderr, "%.2x ", (unsigned char)*key);
+
+ fprintf(stderr, ": idx: %x rgb: %x\n", idx, rgb);
+}
+*/
+
+/*
+ * Converting truecolor samples into palette indices.
+ */
+#define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
+ \
+ static void \
+ tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \
+ struct QDict *palette) { \
+ uint##bpp##_t *src; \
+ uint##bpp##_t rgb; \
+ uint8_t key[6]; \
+ 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++; \
+ } \
+ tight_palette_rgb2buf(rgb, bpp, key); \
+ if (!qdict_haskey(palette, (char *)key)) { \
+ /* \
+ * Should never happen, but don't break everything \
+ * if it does, use the first color instead \
+ */ \
+ idx = 0; \
+ } else { \
+ idx = qdict_get_int(palette, (char *)key); \
+ } \
+ 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 ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
+ shift[0] = vs->clientds.pf.rshift;
+ shift[1] = vs->clientds.pf.gshift;
+ shift[2] = vs->clientds.pf.bshift;
+ } else {
+ shift[0] = 24 - vs->clientds.pf.rshift;
+ shift[1] = 24 - vs->clientds.pf.gshift;
+ shift[2] = 24 - vs->clientds.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 = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
+ \
+ max[0] = vs->clientds.pf.rmax; \
+ max[1] = vs->clientds.pf.gmax; \
+ max[2] = vs->clientds.pf.bmax; \
+ shift[0] = vs->clientds.pf.rshift; \
+ shift[1] = vs->clientds.pf.gshift; \
+ shift[2] = vs->clientds.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 successfull, and in
+ * that case new color will be stored in *colorPtr.
+ */
+
+#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
+ \
+ static bool \
+ check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \
+ uint32_t* color, bool samecolor) \
+ { \
+ VncDisplay *vd = vs->vd; \
+ uint##bpp##_t *fbptr; \
+ uint##bpp##_t c; \
+ int dx, dy; \
+ \
+ fbptr = (uint##bpp##_t *) \
+ (vd->server->data + y * ds_get_linesize(vs->ds) + \
+ x * ds_get_bytes_per_pixel(vs->ds)); \
+ \
+ 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 = (uint##bpp##_t *) \
+ ((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \
+ } \
+ \
+ *color = (uint32_t)c; \
+ return true; \
+ }
+
+DEFINE_CHECK_SOLID_FUNCTION(32)
+DEFINE_CHECK_SOLID_FUNCTION(16)
+DEFINE_CHECK_SOLID_FUNCTION(8)
+
+static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
+ uint32_t* color, bool samecolor)
+{
+ VncDisplay *vd = vs->vd;
+
+ switch(vd->server->pf.bytes_per_pixel) {
+ case 4:
+ return check_solid_tile32(vs, x, y, w, h, color, samecolor);
+ case 2:
+ return check_solid_tile16(vs, x, y, w, h, color, samecolor);
+ default:
+ return check_solid_tile8(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.buffer, vs->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.buffer;
+ zstream->avail_in = vs->tight.offset;
+ zstream->next_out = vs->tight_zlib.buffer + vs->tight_zlib.offset;
+ zstream->avail_out = vs->tight_zlib.capacity - vs->tight_zlib.offset;
+ zstream->data_type = Z_BINARY;
+ previous_out = zstream->total_out;
+
+ /* 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;
+ bytes = zstream->total_out - previous_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 ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
+ rshift = vs->clientds.pf.rshift;
+ gshift = vs->clientds.pf.gshift;
+ bshift = vs->clientds.pf.bshift;
+ } else {
+ rshift = 24 - vs->clientds.pf.rshift;
+ gshift = 24 - vs->clientds.pf.gshift;
+ bshift = 24 - vs->clientds.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 w, int h)
+{
+ int stream = 0;
+ size_t bytes;
+
+ vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
+
+ if (vs->tight_pixel24) {
+ tight_pack24(vs, vs->tight.buffer, w * h, &vs->tight.offset);
+ bytes = 3;
+ } else {
+ bytes = vs->clientds.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.buffer, 1, &vs->tight.offset);
+ bytes = 3;
+ } else {
+ bytes = vs->clientds.pf.bytes_per_pixel;
+ }
+
+ vnc_write(vs, vs->tight.buffer, bytes);
+ return 1;
+}
+
+static int send_mono_rect(VncState *vs, int w, int h, uint32_t bg, uint32_t fg)
+{
+ size_t bytes;
+ int stream = 1;
+ int level = tight_conf[vs->tight_compression].mono_zlib_level;
+
+ 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->clientds.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.buffer, w, h, bg, fg);
+ break;
+ }
+ case 2:
+ vnc_write(vs, &bg, 2);
+ vnc_write(vs, &fg, 2);
+ tight_encode_mono_rect16(vs->tight.buffer, w, h, bg, fg);
+ break;
+ default:
+ vnc_write_u8(vs, bg);
+ vnc_write_u8(vs, fg);
+ tight_encode_mono_rect8(vs->tight.buffer, w, h, bg, fg);
+ break;
+ }
+ vs->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;
+};
+
+static void write_palette(const char *key, QObject *obj, void *opaque)
+{
+ struct palette_cb_priv *priv = opaque;
+ VncState *vs = priv->vs;
+ uint32_t bytes = vs->clientds.pf.bytes_per_pixel;
+ uint8_t idx = qint_get_int(qobject_to_qint(obj));
+
+ if (bytes == 4) {
+ uint32_t color = tight_palette_buf2rgb(32, (uint8_t *)key);
+
+ ((uint32_t*)priv->header)[idx] = color;
+ } else {
+ uint16_t color = tight_palette_buf2rgb(16, (uint8_t *)key);
+
+ ((uint16_t*)priv->header)[idx] = color;
+ }
+}
+
+static bool send_gradient_rect(VncState *vs, int w, int h)
+{
+ int stream = 3;
+ int level = tight_conf[vs->tight_compression].gradient_zlib_level;
+ size_t bytes;
+
+ if (vs->clientds.pf.bytes_per_pixel == 1)
+ return send_full_color_rect(vs, 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.buffer, w, h);
+ bytes = 3;
+ } else if (vs->clientds.pf.bytes_per_pixel == 4) {
+ tight_filter_gradient32(vs, (uint32_t *)vs->tight.buffer, w, h);
+ bytes = 4;
+ } else {
+ tight_filter_gradient16(vs, (uint16_t *)vs->tight.buffer, w, h);
+ bytes = 2;
+ }
+
+ buffer_reset(&vs->tight_gradient);
+
+ bytes = w * h * bytes;
+ vs->tight.offset = bytes;
+
+ bytes = tight_compress_data(vs, stream, bytes,
+ level, Z_FILTERED);
+ return (bytes >= 0);
+}
+
+static int send_palette_rect(VncState *vs, int w, int h, struct QDict *palette)
+{
+ int stream = 2;
+ int level = tight_conf[vs->tight_compression].idx_zlib_level;
+ int colors;
+ size_t bytes;
+
+ colors = qdict_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->clientds.pf.bytes_per_pixel) {
+ case 4:
+ {
+ size_t old_offset, offset;
+ uint32_t header[qdict_size(palette)];
+ struct palette_cb_priv priv = { vs, (uint8_t *)header };
+
+ old_offset = vs->output.offset;
+ qdict_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.buffer, w * h, palette);
+ break;
+ }
+ case 2:
+ {
+ uint16_t header[qdict_size(palette)];
+ struct palette_cb_priv priv = { vs, (uint8_t *)header };
+
+ qdict_iter(palette, write_palette, &priv);
+ vnc_write(vs, header, sizeof(header));
+ tight_encode_indexed_rect16(vs->tight.buffer, w * h, palette);
+ break;
+ }
+ default:
+ return -1; /* No palette for 8bits colors */
+ break;
+ }
+ bytes = w * h;
+ vs->tight.offset = bytes;
+
+ bytes = tight_compress_data(vs, stream, bytes,
+ level, Z_DEFAULT_STRATEGY);
+ return (bytes >= 0);
+}
+
+/*
+ * JPEG compression stuff.
+ */
+#ifdef CONFIG_VNC_JPEG
+static void jpeg_prepare_row24(VncState *vs, uint8_t *dst, int x, int y,
+ int count)
+{
+ VncDisplay *vd = vs->vd;
+ uint32_t *fbptr;
+ uint32_t pix;
+
+ fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) +
+ x * ds_get_bytes_per_pixel(vs->ds));
+
+ while (count--) {
+ pix = *fbptr++;
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift);
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift);
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift);
+ }
+}
+
+#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \
+ \
+ static void \
+ jpeg_prepare_row##bpp(VncState *vs, uint8_t *dst, \
+ int x, int y, int count) \
+ { \
+ VncDisplay *vd = vs->vd; \
+ uint##bpp##_t *fbptr; \
+ uint##bpp##_t pix; \
+ int r, g, b; \
+ \
+ fbptr = (uint##bpp##_t *) \
+ (vd->server->data + y * ds_get_linesize(vs->ds) + \
+ x * ds_get_bytes_per_pixel(vs->ds)); \
+ \
+ while (count--) { \
+ pix = *fbptr++; \
+ \
+ r = (int)((pix >> vs->ds->surface->pf.rshift) \
+ & vs->ds->surface->pf.rmax); \
+ g = (int)((pix >> vs->ds->surface->pf.gshift) \
+ & vs->ds->surface->pf.gmax); \
+ b = (int)((pix >> vs->ds->surface->pf.bshift) \
+ & vs->ds->surface->pf.bmax); \
+ \
+ *dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \
+ / vs->ds->surface->pf.rmax); \
+ *dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \
+ / vs->ds->surface->pf.gmax); \
+ *dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \
+ / vs->ds->surface->pf.bmax); \
+ } \
+ }
+
+DEFINE_JPEG_GET_ROW_FUNCTION(16)
+DEFINE_JPEG_GET_ROW_FUNCTION(32)
+
+static void jpeg_prepare_row(VncState *vs, uint8_t *dst, int x, int y,
+ int count)
+{
+ if (vs->tight_pixel24)
+ jpeg_prepare_row24(vs, dst, x, y, count);
+ else if (ds_get_bytes_per_pixel(vs->ds) == 4)
+ jpeg_prepare_row32(vs, dst, x, y, count);
+ else
+ jpeg_prepare_row16(vs, dst, x, y, count);
+}
+
+/*
+ * 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;
+ JSAMPROW row[1];
+ uint8_t *buf;
+ int dy;
+
+ if (ds_get_bytes_per_pixel(vs->ds) == 1)
+ return send_full_color_rect(vs, w, h);
+
+ buf = qemu_malloc(w * 3);
+ row[0] = buf;
+ 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);
+
+ for (dy = 0; dy < h; dy++) {
+ jpeg_prepare_row(vs, buf, x, y + dy, w);
+ jpeg_write_scanlines(&cinfo, row, 1);
+ }
+
+ 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 */
+
+static void vnc_tight_start(VncState *vs)
+{
+ buffer_reset(&vs->tight);
+
+ // make the output buffer be the zlib buffer, so we can compress it later
+ vs->tight_tmp = vs->output;
+ vs->output = vs->tight;
+}
+
+static void vnc_tight_stop(VncState *vs)
+{
+ // switch back to normal output/zlib buffers
+ vs->tight = vs->output;
+ vs->output = vs->tight_tmp;
+}
+
+static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
+{
+ struct QDict *palette = NULL;
+ uint32_t bg = 0, fg = 0;
+ int colors;
+ int ret = 0;
+
+ vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT);
+
+ vnc_tight_start(vs);
+ vnc_raw_send_framebuffer_update(vs, x, y, w, h);
+ vnc_tight_stop(vs);
+
+ colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette);
+
+ if (colors == 0) {
+ if (tight_detect_smooth_image(vs, w, h)) {
+ if (vs->tight_quality == -1) {
+ ret = send_gradient_rect(vs, w, h);
+ } else {
+#ifdef CONFIG_VNC_JPEG
+ 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, w, h);
+#endif
+ }
+ } else {
+ ret = send_full_color_rect(vs, w, h);
+ }
+ } else if (colors == 1) {
+ ret = send_solid_rect(vs);
+ } else if (colors == 2) {
+ ret = send_mono_rect(vs, w, h, bg, fg);
+ } else if (colors <= 256) {
+#ifdef CONFIG_VNC_JPEG
+ if (colors > 96 && vs->tight_quality != -1 && vs->tight_quality <= 3 &&
+ 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, w, h, palette);
+ }
+#else
+ ret = send_palette_rect(vs, w, h, palette);
+#endif
+ }
+ QDECREF(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, VNC_ENCODING_TIGHT);
+
+ 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)
+{
+ 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 (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);
+ 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);
+ }
+ if (x_best != x) {
+ n += vnc_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 += vnc_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 += vnc_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);
+}
+
+int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
+ int w, int h)
+{
+ int max_rows;
+
+ if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF &&
+ vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) {
+ vs->tight_pixel24 = true;
+ } else {
+ vs->tight_pixel24 = false;
+ }
+
+ if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE)
+ return send_rect_simple(vs, x, y, w, h);
+
+ /* 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);
+}
+
+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);
+ buffer_free(&vs->tight_zlib);
+ buffer_free(&vs->tight_gradient);
+#ifdef CONFIG_VNC_JPEG
+ buffer_free(&vs->tight_jpeg);
+#endif
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 18:26:18 +0000