--- /dev/null
+/*
+ * 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 "config-host.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 <stdio.h>
+#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
+}
Code Review / kvmfornfv.git / blobdiff