root / ui / vnc-enc-tight.c @ d1af0e05
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/*
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* QEMU VNC display driver: tight encoding
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*
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* From libvncserver/libvncserver/tight.c
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* Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config-host.h" |
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#ifdef CONFIG_VNC_PNG
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#include <png.h> |
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#endif
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#ifdef CONFIG_VNC_JPEG
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#include <stdio.h> |
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#include <jpeglib.h> |
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#endif
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#include "qemu-common.h" |
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#include "bswap.h" |
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#include "qint.h" |
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#include "vnc.h" |
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#include "vnc-enc-tight.h" |
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#include "vnc-palette.h" |
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/* Compression level stuff. The following array contains various
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encoder parameters for each of 10 compression levels (0..9).
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Last three parameters correspond to JPEG quality levels (0..9). */
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static const struct { |
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int max_rect_size, max_rect_width;
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int mono_min_rect_size, gradient_min_rect_size;
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int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
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int gradient_threshold, gradient_threshold24;
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int idx_max_colors_divisor;
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int jpeg_quality, jpeg_threshold, jpeg_threshold24;
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} tight_conf[] = { |
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{ 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 }, |
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{ 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 }, |
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{ 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 }, |
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{ 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 }, |
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{ 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 }, |
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{ 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 }, |
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{ 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 }, |
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{ 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 }, |
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{ 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 }, |
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{ 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 } |
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}; |
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static int tight_send_framebuffer_update(VncState *vs, int x, int y, |
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int w, int h); |
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#ifdef CONFIG_VNC_PNG
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static const struct { |
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int png_zlib_level, png_filters;
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} tight_png_conf[] = { |
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{ 0, PNG_NO_FILTERS },
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{ 1, PNG_NO_FILTERS },
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{ 2, PNG_NO_FILTERS },
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{ 3, PNG_NO_FILTERS },
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{ 4, PNG_NO_FILTERS },
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{ 5, PNG_ALL_FILTERS },
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{ 6, PNG_ALL_FILTERS },
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{ 7, PNG_ALL_FILTERS },
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{ 8, PNG_ALL_FILTERS },
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{ 9, PNG_ALL_FILTERS },
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}; |
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static int send_png_rect(VncState *vs, int x, int y, int w, int h, |
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VncPalette *palette); |
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static bool tight_can_send_png_rect(VncState *vs, int w, int h) |
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{ |
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if (vs->tight.type != VNC_ENCODING_TIGHT_PNG) {
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return false; |
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} |
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if (ds_get_bytes_per_pixel(vs->ds) == 1 || |
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vs->clientds.pf.bytes_per_pixel == 1) {
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return false; |
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} |
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return true; |
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} |
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#endif
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/*
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* Code to guess if given rectangle is suitable for smooth image
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* compression (by applying "gradient" filter or JPEG coder).
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*/
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static uint
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tight_detect_smooth_image24(VncState *vs, int w, int h) |
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{ |
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int off;
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int x, y, d, dx;
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uint c; |
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uint stats[256];
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int pixels = 0; |
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int pix, left[3]; |
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uint errors; |
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unsigned char *buf = vs->tight.tight.buffer; |
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/*
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* If client is big-endian, color samples begin from the second
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* byte (offset 1) of a 32-bit pixel value.
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*/
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off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG); |
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memset(stats, 0, sizeof (stats)); |
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for (y = 0, x = 0; y < h && x < w;) { |
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for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; |
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d++) { |
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for (c = 0; c < 3; c++) { |
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left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF; |
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} |
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for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) { |
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for (c = 0; c < 3; c++) { |
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pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF; |
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stats[abs(pix - left[c])]++; |
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left[c] = pix; |
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} |
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pixels++; |
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} |
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} |
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if (w > h) {
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x += h; |
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y = 0;
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} else {
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x = 0;
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y += w; |
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} |
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} |
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/* 95% smooth or more ... */
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if (stats[0] * 33 / pixels >= 95) { |
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return 0; |
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} |
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errors = 0;
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for (c = 1; c < 8; c++) { |
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errors += stats[c] * (c * c); |
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if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { |
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return 0; |
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} |
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} |
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for (; c < 256; c++) { |
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errors += stats[c] * (c * c); |
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} |
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errors /= (pixels * 3 - stats[0]); |
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return errors;
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} |
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#define DEFINE_DETECT_FUNCTION(bpp) \
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\ |
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static uint \
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tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \ |
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bool endian; \
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uint##bpp##_t pix; \ |
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int max[3], shift[3]; \ |
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int x, y, d, dx; \
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uint c; \ |
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uint stats[256]; \
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int pixels = 0; \ |
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int sample, sum, left[3]; \ |
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uint errors; \ |
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unsigned char *buf = vs->tight.tight.buffer; \ |
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\ |
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endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \ |
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(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \ |
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\ |
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\ |
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max[0] = vs->clientds.pf.rmax; \
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max[1] = vs->clientds.pf.gmax; \
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max[2] = vs->clientds.pf.bmax; \
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shift[0] = vs->clientds.pf.rshift; \
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shift[1] = vs->clientds.pf.gshift; \
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shift[2] = vs->clientds.pf.bshift; \
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\ |
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memset(stats, 0, sizeof(stats)); \ |
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\ |
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y = 0, x = 0; \ |
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while (y < h && x < w) { \
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for (d = 0; d < h - y && \ |
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d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \ |
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pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \ |
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if (endian) { \
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pix = bswap_##bpp(pix); \ |
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} \ |
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for (c = 0; c < 3; c++) { \ |
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left[c] = (int)(pix >> shift[c] & max[c]); \
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} \ |
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for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \ |
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dx++) { \ |
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pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \ |
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if (endian) { \
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pix = bswap_##bpp(pix); \ |
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} \ |
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sum = 0; \
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for (c = 0; c < 3; c++) { \ |
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sample = (int)(pix >> shift[c] & max[c]); \
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sum += abs(sample - left[c]); \ |
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left[c] = sample; \ |
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} \ |
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if (sum > 255) { \ |
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sum = 255; \
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} \ |
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stats[sum]++; \ |
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pixels++; \ |
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} \ |
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} \ |
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if (w > h) { \
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x += h; \ |
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y = 0; \
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} else { \
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x = 0; \
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y += w; \ |
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} \ |
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} \ |
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\ |
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if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \ |
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return 0; \ |
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} \ |
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\ |
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errors = 0; \
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for (c = 1; c < 8; c++) { \ |
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errors += stats[c] * (c * c); \ |
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if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \ |
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return 0; \ |
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} \ |
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} \ |
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for (; c < 256; c++) { \ |
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errors += stats[c] * (c * c); \ |
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} \ |
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errors /= (pixels - stats[0]); \
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\ |
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return errors; \
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} |
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DEFINE_DETECT_FUNCTION(16)
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DEFINE_DETECT_FUNCTION(32)
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static int |
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tight_detect_smooth_image(VncState *vs, int w, int h) |
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{ |
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uint errors; |
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int compression = vs->tight.compression;
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int quality = vs->tight.quality;
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if (!vs->vd->lossy) {
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return 0; |
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} |
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if (ds_get_bytes_per_pixel(vs->ds) == 1 || |
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vs->clientds.pf.bytes_per_pixel == 1 ||
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w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) { |
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return 0; |
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} |
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if (vs->tight.quality != -1) { |
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if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
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return 0; |
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} |
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} else {
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if (w * h < tight_conf[compression].gradient_min_rect_size) {
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return 0; |
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} |
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} |
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if (vs->clientds.pf.bytes_per_pixel == 4) { |
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if (vs->tight.pixel24) {
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errors = tight_detect_smooth_image24(vs, w, h); |
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if (vs->tight.quality != -1) { |
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return (errors < tight_conf[quality].jpeg_threshold24);
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} |
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return (errors < tight_conf[compression].gradient_threshold24);
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} else {
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errors = tight_detect_smooth_image32(vs, w, h); |
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} |
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} else {
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errors = tight_detect_smooth_image16(vs, w, h); |
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} |
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if (quality != -1) { |
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return (errors < tight_conf[quality].jpeg_threshold);
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} |
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return (errors < tight_conf[compression].gradient_threshold);
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} |
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/*
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* Code to determine how many different colors used in rectangle.
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*/
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#define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
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\ |
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static int \ |
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tight_fill_palette##bpp(VncState *vs, int x, int y, \ |
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int max, size_t count, \
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uint32_t *bg, uint32_t *fg, \ |
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VncPalette **palette) { \ |
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uint##bpp##_t *data; \ |
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uint##bpp##_t c0, c1, ci; \ |
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int i, n0, n1; \
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\ |
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data = (uint##bpp##_t *)vs->tight.tight.buffer; \ |
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\ |
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c0 = data[0]; \
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i = 1; \
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while (i < count && data[i] == c0) \
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i++; \ |
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if (i >= count) { \
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*bg = *fg = c0; \ |
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return 1; \ |
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} \ |
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\ |
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if (max < 2) { \ |
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return 0; \ |
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} \ |
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\ |
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n0 = i; \ |
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c1 = data[i]; \ |
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n1 = 0; \
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for (i++; i < count; i++) { \
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ci = data[i]; \ |
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if (ci == c0) { \
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n0++; \ |
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} else if (ci == c1) { \ |
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n1++; \ |
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} else \
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break; \
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} \ |
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if (i >= count) { \
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if (n0 > n1) { \
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*bg = (uint32_t)c0; \ |
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*fg = (uint32_t)c1; \ |
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} else { \
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*bg = (uint32_t)c1; \ |
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*fg = (uint32_t)c0; \ |
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} \ |
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return 2; \ |
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} \ |
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\ |
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if (max == 2) { \ |
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return 0; \ |
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} \ |
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\ |
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*palette = palette_new(max, bpp); \ |
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palette_put(*palette, c0); \ |
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palette_put(*palette, c1); \ |
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palette_put(*palette, ci); \ |
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\ |
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for (i++; i < count; i++) { \
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if (data[i] == ci) { \
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continue; \
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} else { \
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ci = data[i]; \ |
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if (!palette_put(*palette, (uint32_t)ci)) { \
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return 0; \ |
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} \ |
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} \ |
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} \ |
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\ |
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return palette_size(*palette); \
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} |
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DEFINE_FILL_PALETTE_FUNCTION(8)
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DEFINE_FILL_PALETTE_FUNCTION(16)
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DEFINE_FILL_PALETTE_FUNCTION(32)
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static int tight_fill_palette(VncState *vs, int x, int y, |
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size_t count, uint32_t *bg, uint32_t *fg, |
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VncPalette **palette) |
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{ |
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int max;
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max = count / tight_conf[vs->tight.compression].idx_max_colors_divisor; |
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if (max < 2 && |
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count >= tight_conf[vs->tight.compression].mono_min_rect_size) { |
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max = 2;
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} |
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if (max >= 256) { |
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max = 256;
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} |
406 |
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switch(vs->clientds.pf.bytes_per_pixel) {
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case 4: |
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return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
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case 2: |
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return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
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default:
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max = 2;
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return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
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} |
416 |
return 0; |
417 |
} |
418 |
|
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/*
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* Converting truecolor samples into palette indices.
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*/
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#define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
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\ |
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static void \ |
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tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \ |
426 |
VncPalette *palette) { \ |
427 |
uint##bpp##_t *src; \ |
428 |
uint##bpp##_t rgb; \ |
429 |
int i, rep; \
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uint8_t idx; \ |
431 |
\ |
432 |
src = (uint##bpp##_t *) buf; \ |
433 |
\ |
434 |
for (i = 0; i < count; i++) { \ |
435 |
\ |
436 |
rgb = *src++; \ |
437 |
rep = 0; \
|
438 |
while (i < count && *src == rgb) { \
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439 |
rep++, src++, i++; \ |
440 |
} \ |
441 |
idx = palette_idx(palette, rgb); \ |
442 |
/* \
|
443 |
* Should never happen, but don't break everything \
|
444 |
* if it does, use the first color instead \
|
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*/ \
|
446 |
if (idx == -1) { \ |
447 |
idx = 0; \
|
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} \ |
449 |
while (rep >= 0) { \ |
450 |
*buf++ = idx; \ |
451 |
rep--; \ |
452 |
} \ |
453 |
} \ |
454 |
} |
455 |
|
456 |
DEFINE_IDX_ENCODE_FUNCTION(16)
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DEFINE_IDX_ENCODE_FUNCTION(32)
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458 |
|
459 |
#define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
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\ |
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static void \ |
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tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \ |
463 |
uint##bpp##_t bg, uint##bpp##_t fg) { \ |
464 |
uint##bpp##_t *ptr; \ |
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unsigned int value, mask; \ |
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int aligned_width; \
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int x, y, bg_bits; \
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\ |
469 |
ptr = (uint##bpp##_t *) buf; \ |
470 |
aligned_width = w - w % 8; \
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\ |
472 |
for (y = 0; y < h; y++) { \ |
473 |
for (x = 0; x < aligned_width; x += 8) { \ |
474 |
for (bg_bits = 0; bg_bits < 8; bg_bits++) { \ |
475 |
if (*ptr++ != bg) { \
|
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break; \
|
477 |
} \ |
478 |
} \ |
479 |
if (bg_bits == 8) { \ |
480 |
*buf++ = 0; \
|
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continue; \
|
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} \ |
483 |
mask = 0x80 >> bg_bits; \
|
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value = mask; \ |
485 |
for (bg_bits++; bg_bits < 8; bg_bits++) { \ |
486 |
mask >>= 1; \
|
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if (*ptr++ != bg) { \
|
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value |= mask; \ |
489 |
} \ |
490 |
} \ |
491 |
*buf++ = (uint8_t)value; \ |
492 |
} \ |
493 |
\ |
494 |
mask = 0x80; \
|
495 |
value = 0; \
|
496 |
if (x >= w) { \
|
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continue; \
|
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} \ |
499 |
\ |
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for (; x < w; x++) { \
|
501 |
if (*ptr++ != bg) { \
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value |= mask; \ |
503 |
} \ |
504 |
mask >>= 1; \
|
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} \ |
506 |
*buf++ = (uint8_t)value; \ |
507 |
} \ |
508 |
} |
509 |
|
510 |
DEFINE_MONO_ENCODE_FUNCTION(8)
|
511 |
DEFINE_MONO_ENCODE_FUNCTION(16)
|
512 |
DEFINE_MONO_ENCODE_FUNCTION(32)
|
513 |
|
514 |
/*
|
515 |
* ``Gradient'' filter for 24-bit color samples.
|
516 |
* Should be called only when redMax, greenMax and blueMax are 255.
|
517 |
* Color components assumed to be byte-aligned.
|
518 |
*/
|
519 |
|
520 |
static void |
521 |
tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h) |
522 |
{ |
523 |
uint32_t *buf32; |
524 |
uint32_t pix32; |
525 |
int shift[3]; |
526 |
int *prev;
|
527 |
int here[3], upper[3], left[3], upperleft[3]; |
528 |
int prediction;
|
529 |
int x, y, c;
|
530 |
|
531 |
buf32 = (uint32_t *)buf; |
532 |
memset(vs->tight.gradient.buffer, 0, w * 3 * sizeof(int)); |
533 |
|
534 |
if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
|
535 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) { |
536 |
shift[0] = vs->clientds.pf.rshift;
|
537 |
shift[1] = vs->clientds.pf.gshift;
|
538 |
shift[2] = vs->clientds.pf.bshift;
|
539 |
} else {
|
540 |
shift[0] = 24 - vs->clientds.pf.rshift; |
541 |
shift[1] = 24 - vs->clientds.pf.gshift; |
542 |
shift[2] = 24 - vs->clientds.pf.bshift; |
543 |
} |
544 |
|
545 |
for (y = 0; y < h; y++) { |
546 |
for (c = 0; c < 3; c++) { |
547 |
upper[c] = 0;
|
548 |
here[c] = 0;
|
549 |
} |
550 |
prev = (int *)vs->tight.gradient.buffer;
|
551 |
for (x = 0; x < w; x++) { |
552 |
pix32 = *buf32++; |
553 |
for (c = 0; c < 3; c++) { |
554 |
upperleft[c] = upper[c]; |
555 |
left[c] = here[c]; |
556 |
upper[c] = *prev; |
557 |
here[c] = (int)(pix32 >> shift[c] & 0xFF); |
558 |
*prev++ = here[c]; |
559 |
|
560 |
prediction = left[c] + upper[c] - upperleft[c]; |
561 |
if (prediction < 0) { |
562 |
prediction = 0;
|
563 |
} else if (prediction > 0xFF) { |
564 |
prediction = 0xFF;
|
565 |
} |
566 |
*buf++ = (char)(here[c] - prediction);
|
567 |
} |
568 |
} |
569 |
} |
570 |
} |
571 |
|
572 |
|
573 |
/*
|
574 |
* ``Gradient'' filter for other color depths.
|
575 |
*/
|
576 |
|
577 |
#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
|
578 |
\ |
579 |
static void \ |
580 |
tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \ |
581 |
int w, int h) { \ |
582 |
uint##bpp##_t pix, diff; \ |
583 |
bool endian; \
|
584 |
int *prev; \
|
585 |
int max[3], shift[3]; \ |
586 |
int here[3], upper[3], left[3], upperleft[3]; \ |
587 |
int prediction; \
|
588 |
int x, y, c; \
|
589 |
\ |
590 |
memset (vs->tight.gradient.buffer, 0, w * 3 * sizeof(int)); \ |
591 |
\ |
592 |
endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \ |
593 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \ |
594 |
\ |
595 |
max[0] = vs->clientds.pf.rmax; \
|
596 |
max[1] = vs->clientds.pf.gmax; \
|
597 |
max[2] = vs->clientds.pf.bmax; \
|
598 |
shift[0] = vs->clientds.pf.rshift; \
|
599 |
shift[1] = vs->clientds.pf.gshift; \
|
600 |
shift[2] = vs->clientds.pf.bshift; \
|
601 |
\ |
602 |
for (y = 0; y < h; y++) { \ |
603 |
for (c = 0; c < 3; c++) { \ |
604 |
upper[c] = 0; \
|
605 |
here[c] = 0; \
|
606 |
} \ |
607 |
prev = (int *)vs->tight.gradient.buffer; \
|
608 |
for (x = 0; x < w; x++) { \ |
609 |
pix = *buf; \ |
610 |
if (endian) { \
|
611 |
pix = bswap_##bpp(pix); \ |
612 |
} \ |
613 |
diff = 0; \
|
614 |
for (c = 0; c < 3; c++) { \ |
615 |
upperleft[c] = upper[c]; \ |
616 |
left[c] = here[c]; \ |
617 |
upper[c] = *prev; \ |
618 |
here[c] = (int)(pix >> shift[c] & max[c]); \
|
619 |
*prev++ = here[c]; \ |
620 |
\ |
621 |
prediction = left[c] + upper[c] - upperleft[c]; \ |
622 |
if (prediction < 0) { \ |
623 |
prediction = 0; \
|
624 |
} else if (prediction > max[c]) { \ |
625 |
prediction = max[c]; \ |
626 |
} \ |
627 |
diff |= ((here[c] - prediction) & max[c]) \ |
628 |
<< shift[c]; \ |
629 |
} \ |
630 |
if (endian) { \
|
631 |
diff = bswap_##bpp(diff); \ |
632 |
} \ |
633 |
*buf++ = diff; \ |
634 |
} \ |
635 |
} \ |
636 |
} |
637 |
|
638 |
DEFINE_GRADIENT_FILTER_FUNCTION(16)
|
639 |
DEFINE_GRADIENT_FILTER_FUNCTION(32)
|
640 |
|
641 |
/*
|
642 |
* Check if a rectangle is all of the same color. If needSameColor is
|
643 |
* set to non-zero, then also check that its color equals to the
|
644 |
* *colorPtr value. The result is 1 if the test is successfull, and in
|
645 |
* that case new color will be stored in *colorPtr.
|
646 |
*/
|
647 |
|
648 |
#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
|
649 |
\ |
650 |
static bool \ |
651 |
check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \ |
652 |
uint32_t* color, bool samecolor) \
|
653 |
{ \ |
654 |
VncDisplay *vd = vs->vd; \ |
655 |
uint##bpp##_t *fbptr; \ |
656 |
uint##bpp##_t c; \ |
657 |
int dx, dy; \
|
658 |
\ |
659 |
fbptr = (uint##bpp##_t *) \ |
660 |
(vd->server->data + y * ds_get_linesize(vs->ds) + \ |
661 |
x * ds_get_bytes_per_pixel(vs->ds)); \ |
662 |
\ |
663 |
c = *fbptr; \ |
664 |
if (samecolor && (uint32_t)c != *color) { \
|
665 |
return false; \ |
666 |
} \ |
667 |
\ |
668 |
for (dy = 0; dy < h; dy++) { \ |
669 |
for (dx = 0; dx < w; dx++) { \ |
670 |
if (c != fbptr[dx]) { \
|
671 |
return false; \ |
672 |
} \ |
673 |
} \ |
674 |
fbptr = (uint##bpp##_t *) \ |
675 |
((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \ |
676 |
} \ |
677 |
\ |
678 |
*color = (uint32_t)c; \ |
679 |
return true; \ |
680 |
} |
681 |
|
682 |
DEFINE_CHECK_SOLID_FUNCTION(32)
|
683 |
DEFINE_CHECK_SOLID_FUNCTION(16)
|
684 |
DEFINE_CHECK_SOLID_FUNCTION(8)
|
685 |
|
686 |
static bool check_solid_tile(VncState *vs, int x, int y, int w, int h, |
687 |
uint32_t* color, bool samecolor)
|
688 |
{ |
689 |
VncDisplay *vd = vs->vd; |
690 |
|
691 |
switch(vd->server->pf.bytes_per_pixel) {
|
692 |
case 4: |
693 |
return check_solid_tile32(vs, x, y, w, h, color, samecolor);
|
694 |
case 2: |
695 |
return check_solid_tile16(vs, x, y, w, h, color, samecolor);
|
696 |
default:
|
697 |
return check_solid_tile8(vs, x, y, w, h, color, samecolor);
|
698 |
} |
699 |
} |
700 |
|
701 |
static void find_best_solid_area(VncState *vs, int x, int y, int w, int h, |
702 |
uint32_t color, int *w_ptr, int *h_ptr) |
703 |
{ |
704 |
int dx, dy, dw, dh;
|
705 |
int w_prev;
|
706 |
int w_best = 0, h_best = 0; |
707 |
|
708 |
w_prev = w; |
709 |
|
710 |
for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
711 |
|
712 |
dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy); |
713 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev); |
714 |
|
715 |
if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) { |
716 |
break;
|
717 |
} |
718 |
|
719 |
for (dx = x + dw; dx < x + w_prev;) {
|
720 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx); |
721 |
|
722 |
if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) { |
723 |
break;
|
724 |
} |
725 |
dx += dw; |
726 |
} |
727 |
|
728 |
w_prev = dx - x; |
729 |
if (w_prev * (dy + dh - y) > w_best * h_best) {
|
730 |
w_best = w_prev; |
731 |
h_best = dy + dh - y; |
732 |
} |
733 |
} |
734 |
|
735 |
*w_ptr = w_best; |
736 |
*h_ptr = h_best; |
737 |
} |
738 |
|
739 |
static void extend_solid_area(VncState *vs, int x, int y, int w, int h, |
740 |
uint32_t color, int *x_ptr, int *y_ptr, |
741 |
int *w_ptr, int *h_ptr) |
742 |
{ |
743 |
int cx, cy;
|
744 |
|
745 |
/* Try to extend the area upwards. */
|
746 |
for ( cy = *y_ptr - 1; |
747 |
cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
748 |
cy-- ); |
749 |
*h_ptr += *y_ptr - (cy + 1);
|
750 |
*y_ptr = cy + 1;
|
751 |
|
752 |
/* ... downwards. */
|
753 |
for ( cy = *y_ptr + *h_ptr;
|
754 |
cy < y + h && |
755 |
check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
756 |
cy++ ); |
757 |
*h_ptr += cy - (*y_ptr + *h_ptr); |
758 |
|
759 |
/* ... to the left. */
|
760 |
for ( cx = *x_ptr - 1; |
761 |
cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
762 |
cx-- ); |
763 |
*w_ptr += *x_ptr - (cx + 1);
|
764 |
*x_ptr = cx + 1;
|
765 |
|
766 |
/* ... to the right. */
|
767 |
for ( cx = *x_ptr + *w_ptr;
|
768 |
cx < x + w && |
769 |
check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
770 |
cx++ ); |
771 |
*w_ptr += cx - (*x_ptr + *w_ptr); |
772 |
} |
773 |
|
774 |
static int tight_init_stream(VncState *vs, int stream_id, |
775 |
int level, int strategy) |
776 |
{ |
777 |
z_streamp zstream = &vs->tight.stream[stream_id]; |
778 |
|
779 |
if (zstream->opaque == NULL) { |
780 |
int err;
|
781 |
|
782 |
VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
|
783 |
VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
|
784 |
zstream->zalloc = vnc_zlib_zalloc; |
785 |
zstream->zfree = vnc_zlib_zfree; |
786 |
|
787 |
err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS, |
788 |
MAX_MEM_LEVEL, strategy); |
789 |
|
790 |
if (err != Z_OK) {
|
791 |
fprintf(stderr, "VNC: error initializing zlib\n");
|
792 |
return -1; |
793 |
} |
794 |
|
795 |
vs->tight.levels[stream_id] = level; |
796 |
zstream->opaque = vs; |
797 |
} |
798 |
|
799 |
if (vs->tight.levels[stream_id] != level) {
|
800 |
if (deflateParams(zstream, level, strategy) != Z_OK) {
|
801 |
return -1; |
802 |
} |
803 |
vs->tight.levels[stream_id] = level; |
804 |
} |
805 |
return 0; |
806 |
} |
807 |
|
808 |
static void tight_send_compact_size(VncState *vs, size_t len) |
809 |
{ |
810 |
int lpc = 0; |
811 |
int bytes = 0; |
812 |
char buf[3] = {0, 0, 0}; |
813 |
|
814 |
buf[bytes++] = len & 0x7F;
|
815 |
if (len > 0x7F) { |
816 |
buf[bytes-1] |= 0x80; |
817 |
buf[bytes++] = (len >> 7) & 0x7F; |
818 |
if (len > 0x3FFF) { |
819 |
buf[bytes-1] |= 0x80; |
820 |
buf[bytes++] = (len >> 14) & 0xFF; |
821 |
} |
822 |
} |
823 |
for (lpc = 0; lpc < bytes; lpc++) { |
824 |
vnc_write_u8(vs, buf[lpc]); |
825 |
} |
826 |
} |
827 |
|
828 |
static int tight_compress_data(VncState *vs, int stream_id, size_t bytes, |
829 |
int level, int strategy) |
830 |
{ |
831 |
z_streamp zstream = &vs->tight.stream[stream_id]; |
832 |
int previous_out;
|
833 |
|
834 |
if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
|
835 |
vnc_write(vs, vs->tight.tight.buffer, vs->tight.tight.offset); |
836 |
return bytes;
|
837 |
} |
838 |
|
839 |
if (tight_init_stream(vs, stream_id, level, strategy)) {
|
840 |
return -1; |
841 |
} |
842 |
|
843 |
/* reserve memory in output buffer */
|
844 |
buffer_reserve(&vs->tight.zlib, bytes + 64);
|
845 |
|
846 |
/* set pointers */
|
847 |
zstream->next_in = vs->tight.tight.buffer; |
848 |
zstream->avail_in = vs->tight.tight.offset; |
849 |
zstream->next_out = vs->tight.zlib.buffer + vs->tight.zlib.offset; |
850 |
zstream->avail_out = vs->tight.zlib.capacity - vs->tight.zlib.offset; |
851 |
zstream->data_type = Z_BINARY; |
852 |
previous_out = zstream->total_out; |
853 |
|
854 |
/* start encoding */
|
855 |
if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
|
856 |
fprintf(stderr, "VNC: error during tight compression\n");
|
857 |
return -1; |
858 |
} |
859 |
|
860 |
vs->tight.zlib.offset = vs->tight.zlib.capacity - zstream->avail_out; |
861 |
bytes = zstream->total_out - previous_out; |
862 |
|
863 |
tight_send_compact_size(vs, bytes); |
864 |
vnc_write(vs, vs->tight.zlib.buffer, bytes); |
865 |
|
866 |
buffer_reset(&vs->tight.zlib); |
867 |
|
868 |
return bytes;
|
869 |
} |
870 |
|
871 |
/*
|
872 |
* Subencoding implementations.
|
873 |
*/
|
874 |
static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret) |
875 |
{ |
876 |
uint32_t *buf32; |
877 |
uint32_t pix; |
878 |
int rshift, gshift, bshift;
|
879 |
|
880 |
buf32 = (uint32_t *)buf; |
881 |
|
882 |
if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
|
883 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) { |
884 |
rshift = vs->clientds.pf.rshift; |
885 |
gshift = vs->clientds.pf.gshift; |
886 |
bshift = vs->clientds.pf.bshift; |
887 |
} else {
|
888 |
rshift = 24 - vs->clientds.pf.rshift;
|
889 |
gshift = 24 - vs->clientds.pf.gshift;
|
890 |
bshift = 24 - vs->clientds.pf.bshift;
|
891 |
} |
892 |
|
893 |
if (ret) {
|
894 |
*ret = count * 3;
|
895 |
} |
896 |
|
897 |
while (count--) {
|
898 |
pix = *buf32++; |
899 |
*buf++ = (char)(pix >> rshift);
|
900 |
*buf++ = (char)(pix >> gshift);
|
901 |
*buf++ = (char)(pix >> bshift);
|
902 |
} |
903 |
} |
904 |
|
905 |
static int send_full_color_rect(VncState *vs, int x, int y, int w, int h) |
906 |
{ |
907 |
int stream = 0; |
908 |
size_t bytes; |
909 |
|
910 |
#ifdef CONFIG_VNC_PNG
|
911 |
if (tight_can_send_png_rect(vs, w, h)) {
|
912 |
return send_png_rect(vs, x, y, w, h, NULL); |
913 |
} |
914 |
#endif
|
915 |
|
916 |
vnc_write_u8(vs, stream << 4); /* no flushing, no filter */ |
917 |
|
918 |
if (vs->tight.pixel24) {
|
919 |
tight_pack24(vs, vs->tight.tight.buffer, w * h, &vs->tight.tight.offset); |
920 |
bytes = 3;
|
921 |
} else {
|
922 |
bytes = vs->clientds.pf.bytes_per_pixel; |
923 |
} |
924 |
|
925 |
bytes = tight_compress_data(vs, stream, w * h * bytes, |
926 |
tight_conf[vs->tight.compression].raw_zlib_level, |
927 |
Z_DEFAULT_STRATEGY); |
928 |
|
929 |
return (bytes >= 0); |
930 |
} |
931 |
|
932 |
static int send_solid_rect(VncState *vs) |
933 |
{ |
934 |
size_t bytes; |
935 |
|
936 |
vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */ |
937 |
|
938 |
if (vs->tight.pixel24) {
|
939 |
tight_pack24(vs, vs->tight.tight.buffer, 1, &vs->tight.tight.offset);
|
940 |
bytes = 3;
|
941 |
} else {
|
942 |
bytes = vs->clientds.pf.bytes_per_pixel; |
943 |
} |
944 |
|
945 |
vnc_write(vs, vs->tight.tight.buffer, bytes); |
946 |
return 1; |
947 |
} |
948 |
|
949 |
static int send_mono_rect(VncState *vs, int x, int y, |
950 |
int w, int h, uint32_t bg, uint32_t fg) |
951 |
{ |
952 |
size_t bytes; |
953 |
int stream = 1; |
954 |
int level = tight_conf[vs->tight.compression].mono_zlib_level;
|
955 |
|
956 |
#ifdef CONFIG_VNC_PNG
|
957 |
if (tight_can_send_png_rect(vs, w, h)) {
|
958 |
int ret;
|
959 |
int bpp = vs->clientds.pf.bytes_per_pixel * 8; |
960 |
VncPalette *palette = palette_new(2, bpp);
|
961 |
|
962 |
palette_put(palette, bg); |
963 |
palette_put(palette, fg); |
964 |
ret = send_png_rect(vs, x, y, w, h, palette); |
965 |
palette_destroy(palette); |
966 |
return ret;
|
967 |
} |
968 |
#endif
|
969 |
|
970 |
bytes = ((w + 7) / 8) * h; |
971 |
|
972 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
973 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
974 |
vnc_write_u8(vs, 1);
|
975 |
|
976 |
switch(vs->clientds.pf.bytes_per_pixel) {
|
977 |
case 4: |
978 |
{ |
979 |
uint32_t buf[2] = {bg, fg};
|
980 |
size_t ret = sizeof (buf);
|
981 |
|
982 |
if (vs->tight.pixel24) {
|
983 |
tight_pack24(vs, (unsigned char*)buf, 2, &ret); |
984 |
} |
985 |
vnc_write(vs, buf, ret); |
986 |
|
987 |
tight_encode_mono_rect32(vs->tight.tight.buffer, w, h, bg, fg); |
988 |
break;
|
989 |
} |
990 |
case 2: |
991 |
vnc_write(vs, &bg, 2);
|
992 |
vnc_write(vs, &fg, 2);
|
993 |
tight_encode_mono_rect16(vs->tight.tight.buffer, w, h, bg, fg); |
994 |
break;
|
995 |
default:
|
996 |
vnc_write_u8(vs, bg); |
997 |
vnc_write_u8(vs, fg); |
998 |
tight_encode_mono_rect8(vs->tight.tight.buffer, w, h, bg, fg); |
999 |
break;
|
1000 |
} |
1001 |
vs->tight.tight.offset = bytes; |
1002 |
|
1003 |
bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY); |
1004 |
return (bytes >= 0); |
1005 |
} |
1006 |
|
1007 |
struct palette_cb_priv {
|
1008 |
VncState *vs; |
1009 |
uint8_t *header; |
1010 |
#ifdef CONFIG_VNC_PNG
|
1011 |
png_colorp png_palette; |
1012 |
#endif
|
1013 |
}; |
1014 |
|
1015 |
static void write_palette(int idx, uint32_t color, void *opaque) |
1016 |
{ |
1017 |
struct palette_cb_priv *priv = opaque;
|
1018 |
VncState *vs = priv->vs; |
1019 |
uint32_t bytes = vs->clientds.pf.bytes_per_pixel; |
1020 |
|
1021 |
if (bytes == 4) { |
1022 |
((uint32_t*)priv->header)[idx] = color; |
1023 |
} else {
|
1024 |
((uint16_t*)priv->header)[idx] = color; |
1025 |
} |
1026 |
} |
1027 |
|
1028 |
static bool send_gradient_rect(VncState *vs, int x, int y, int w, int h) |
1029 |
{ |
1030 |
int stream = 3; |
1031 |
int level = tight_conf[vs->tight.compression].gradient_zlib_level;
|
1032 |
size_t bytes; |
1033 |
|
1034 |
if (vs->clientds.pf.bytes_per_pixel == 1) |
1035 |
return send_full_color_rect(vs, x, y, w, h);
|
1036 |
|
1037 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
1038 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT); |
1039 |
|
1040 |
buffer_reserve(&vs->tight.gradient, w * 3 * sizeof (int)); |
1041 |
|
1042 |
if (vs->tight.pixel24) {
|
1043 |
tight_filter_gradient24(vs, vs->tight.tight.buffer, w, h); |
1044 |
bytes = 3;
|
1045 |
} else if (vs->clientds.pf.bytes_per_pixel == 4) { |
1046 |
tight_filter_gradient32(vs, (uint32_t *)vs->tight.tight.buffer, w, h); |
1047 |
bytes = 4;
|
1048 |
} else {
|
1049 |
tight_filter_gradient16(vs, (uint16_t *)vs->tight.tight.buffer, w, h); |
1050 |
bytes = 2;
|
1051 |
} |
1052 |
|
1053 |
buffer_reset(&vs->tight.gradient); |
1054 |
|
1055 |
bytes = w * h * bytes; |
1056 |
vs->tight.tight.offset = bytes; |
1057 |
|
1058 |
bytes = tight_compress_data(vs, stream, bytes, |
1059 |
level, Z_FILTERED); |
1060 |
return (bytes >= 0); |
1061 |
} |
1062 |
|
1063 |
static int send_palette_rect(VncState *vs, int x, int y, |
1064 |
int w, int h, VncPalette *palette) |
1065 |
{ |
1066 |
int stream = 2; |
1067 |
int level = tight_conf[vs->tight.compression].idx_zlib_level;
|
1068 |
int colors;
|
1069 |
size_t bytes; |
1070 |
|
1071 |
#ifdef CONFIG_VNC_PNG
|
1072 |
if (tight_can_send_png_rect(vs, w, h)) {
|
1073 |
return send_png_rect(vs, x, y, w, h, palette);
|
1074 |
} |
1075 |
#endif
|
1076 |
|
1077 |
colors = palette_size(palette); |
1078 |
|
1079 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
1080 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
1081 |
vnc_write_u8(vs, colors - 1);
|
1082 |
|
1083 |
switch(vs->clientds.pf.bytes_per_pixel) {
|
1084 |
case 4: |
1085 |
{ |
1086 |
size_t old_offset, offset; |
1087 |
uint32_t header[palette_size(palette)]; |
1088 |
struct palette_cb_priv priv = { vs, (uint8_t *)header };
|
1089 |
|
1090 |
old_offset = vs->output.offset; |
1091 |
palette_iter(palette, write_palette, &priv); |
1092 |
vnc_write(vs, header, sizeof(header));
|
1093 |
|
1094 |
if (vs->tight.pixel24) {
|
1095 |
tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset); |
1096 |
vs->output.offset = old_offset + offset; |
1097 |
} |
1098 |
|
1099 |
tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette); |
1100 |
break;
|
1101 |
} |
1102 |
case 2: |
1103 |
{ |
1104 |
uint16_t header[palette_size(palette)]; |
1105 |
struct palette_cb_priv priv = { vs, (uint8_t *)header };
|
1106 |
|
1107 |
palette_iter(palette, write_palette, &priv); |
1108 |
vnc_write(vs, header, sizeof(header));
|
1109 |
tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette); |
1110 |
break;
|
1111 |
} |
1112 |
default:
|
1113 |
return -1; /* No palette for 8bits colors */ |
1114 |
break;
|
1115 |
} |
1116 |
bytes = w * h; |
1117 |
vs->tight.tight.offset = bytes; |
1118 |
|
1119 |
bytes = tight_compress_data(vs, stream, bytes, |
1120 |
level, Z_DEFAULT_STRATEGY); |
1121 |
return (bytes >= 0); |
1122 |
} |
1123 |
|
1124 |
#if defined(CONFIG_VNC_JPEG) || defined(CONFIG_VNC_PNG)
|
1125 |
static void rgb_prepare_row24(VncState *vs, uint8_t *dst, int x, int y, |
1126 |
int count)
|
1127 |
{ |
1128 |
VncDisplay *vd = vs->vd; |
1129 |
uint32_t *fbptr; |
1130 |
uint32_t pix; |
1131 |
|
1132 |
fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) + |
1133 |
x * ds_get_bytes_per_pixel(vs->ds)); |
1134 |
|
1135 |
while (count--) {
|
1136 |
pix = *fbptr++; |
1137 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift); |
1138 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift); |
1139 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift); |
1140 |
} |
1141 |
} |
1142 |
|
1143 |
#define DEFINE_RGB_GET_ROW_FUNCTION(bpp) \
|
1144 |
\ |
1145 |
static void \ |
1146 |
rgb_prepare_row##bpp(VncState *vs, uint8_t *dst, \ |
1147 |
int x, int y, int count) \ |
1148 |
{ \ |
1149 |
VncDisplay *vd = vs->vd; \ |
1150 |
uint##bpp##_t *fbptr; \ |
1151 |
uint##bpp##_t pix; \ |
1152 |
int r, g, b; \
|
1153 |
\ |
1154 |
fbptr = (uint##bpp##_t *) \ |
1155 |
(vd->server->data + y * ds_get_linesize(vs->ds) + \ |
1156 |
x * ds_get_bytes_per_pixel(vs->ds)); \ |
1157 |
\ |
1158 |
while (count--) { \
|
1159 |
pix = *fbptr++; \ |
1160 |
\ |
1161 |
r = (int)((pix >> vs->ds->surface->pf.rshift) \
|
1162 |
& vs->ds->surface->pf.rmax); \ |
1163 |
g = (int)((pix >> vs->ds->surface->pf.gshift) \
|
1164 |
& vs->ds->surface->pf.gmax); \ |
1165 |
b = (int)((pix >> vs->ds->surface->pf.bshift) \
|
1166 |
& vs->ds->surface->pf.bmax); \ |
1167 |
\ |
1168 |
*dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \ |
1169 |
/ vs->ds->surface->pf.rmax); \ |
1170 |
*dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \ |
1171 |
/ vs->ds->surface->pf.gmax); \ |
1172 |
*dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \ |
1173 |
/ vs->ds->surface->pf.bmax); \ |
1174 |
} \ |
1175 |
} |
1176 |
|
1177 |
DEFINE_RGB_GET_ROW_FUNCTION(16)
|
1178 |
DEFINE_RGB_GET_ROW_FUNCTION(32)
|
1179 |
|
1180 |
static void rgb_prepare_row(VncState *vs, uint8_t *dst, int x, int y, |
1181 |
int count)
|
1182 |
{ |
1183 |
if (vs->tight.pixel24)
|
1184 |
rgb_prepare_row24(vs, dst, x, y, count); |
1185 |
else if (ds_get_bytes_per_pixel(vs->ds) == 4) |
1186 |
rgb_prepare_row32(vs, dst, x, y, count); |
1187 |
else
|
1188 |
rgb_prepare_row16(vs, dst, x, y, count); |
1189 |
} |
1190 |
#endif /* CONFIG_VNC_JPEG or CONFIG_VNC_PNG */ |
1191 |
|
1192 |
/*
|
1193 |
* JPEG compression stuff.
|
1194 |
*/
|
1195 |
#ifdef CONFIG_VNC_JPEG
|
1196 |
/*
|
1197 |
* Destination manager implementation for JPEG library.
|
1198 |
*/
|
1199 |
|
1200 |
/* This is called once per encoding */
|
1201 |
static void jpeg_init_destination(j_compress_ptr cinfo) |
1202 |
{ |
1203 |
VncState *vs = cinfo->client_data; |
1204 |
Buffer *buffer = &vs->tight.jpeg; |
1205 |
|
1206 |
cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset; |
1207 |
cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset); |
1208 |
} |
1209 |
|
1210 |
/* This is called when we ran out of buffer (shouldn't happen!) */
|
1211 |
static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
|
1212 |
{ |
1213 |
VncState *vs = cinfo->client_data; |
1214 |
Buffer *buffer = &vs->tight.jpeg; |
1215 |
|
1216 |
buffer->offset = buffer->capacity; |
1217 |
buffer_reserve(buffer, 2048);
|
1218 |
jpeg_init_destination(cinfo); |
1219 |
return TRUE;
|
1220 |
} |
1221 |
|
1222 |
/* This is called when we are done processing data */
|
1223 |
static void jpeg_term_destination(j_compress_ptr cinfo) |
1224 |
{ |
1225 |
VncState *vs = cinfo->client_data; |
1226 |
Buffer *buffer = &vs->tight.jpeg; |
1227 |
|
1228 |
buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer; |
1229 |
} |
1230 |
|
1231 |
static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality) |
1232 |
{ |
1233 |
struct jpeg_compress_struct cinfo;
|
1234 |
struct jpeg_error_mgr jerr;
|
1235 |
struct jpeg_destination_mgr manager;
|
1236 |
JSAMPROW row[1];
|
1237 |
uint8_t *buf; |
1238 |
int dy;
|
1239 |
|
1240 |
if (ds_get_bytes_per_pixel(vs->ds) == 1) |
1241 |
return send_full_color_rect(vs, x, y, w, h);
|
1242 |
|
1243 |
buffer_reserve(&vs->tight.jpeg, 2048);
|
1244 |
|
1245 |
cinfo.err = jpeg_std_error(&jerr); |
1246 |
jpeg_create_compress(&cinfo); |
1247 |
|
1248 |
cinfo.client_data = vs; |
1249 |
cinfo.image_width = w; |
1250 |
cinfo.image_height = h; |
1251 |
cinfo.input_components = 3;
|
1252 |
cinfo.in_color_space = JCS_RGB; |
1253 |
|
1254 |
jpeg_set_defaults(&cinfo); |
1255 |
jpeg_set_quality(&cinfo, quality, true);
|
1256 |
|
1257 |
manager.init_destination = jpeg_init_destination; |
1258 |
manager.empty_output_buffer = jpeg_empty_output_buffer; |
1259 |
manager.term_destination = jpeg_term_destination; |
1260 |
cinfo.dest = &manager; |
1261 |
|
1262 |
jpeg_start_compress(&cinfo, true);
|
1263 |
|
1264 |
buf = qemu_malloc(w * 3);
|
1265 |
row[0] = buf;
|
1266 |
for (dy = 0; dy < h; dy++) { |
1267 |
rgb_prepare_row(vs, buf, x, y + dy, w); |
1268 |
jpeg_write_scanlines(&cinfo, row, 1);
|
1269 |
} |
1270 |
qemu_free(buf); |
1271 |
|
1272 |
jpeg_finish_compress(&cinfo); |
1273 |
jpeg_destroy_compress(&cinfo); |
1274 |
|
1275 |
vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
|
1276 |
|
1277 |
tight_send_compact_size(vs, vs->tight.jpeg.offset); |
1278 |
vnc_write(vs, vs->tight.jpeg.buffer, vs->tight.jpeg.offset); |
1279 |
buffer_reset(&vs->tight.jpeg); |
1280 |
|
1281 |
return 1; |
1282 |
} |
1283 |
#endif /* CONFIG_VNC_JPEG */ |
1284 |
|
1285 |
/*
|
1286 |
* PNG compression stuff.
|
1287 |
*/
|
1288 |
#ifdef CONFIG_VNC_PNG
|
1289 |
static void write_png_palette(int idx, uint32_t pix, void *opaque) |
1290 |
{ |
1291 |
struct palette_cb_priv *priv = opaque;
|
1292 |
VncState *vs = priv->vs; |
1293 |
png_colorp color = &priv->png_palette[idx]; |
1294 |
|
1295 |
if (vs->tight.pixel24)
|
1296 |
{ |
1297 |
color->red = (pix >> vs->clientds.pf.rshift) & vs->clientds.pf.rmax; |
1298 |
color->green = (pix >> vs->clientds.pf.gshift) & vs->clientds.pf.gmax; |
1299 |
color->blue = (pix >> vs->clientds.pf.bshift) & vs->clientds.pf.bmax; |
1300 |
} |
1301 |
else
|
1302 |
{ |
1303 |
int red, green, blue;
|
1304 |
|
1305 |
red = (pix >> vs->clientds.pf.rshift) & vs->clientds.pf.rmax; |
1306 |
green = (pix >> vs->clientds.pf.gshift) & vs->clientds.pf.gmax; |
1307 |
blue = (pix >> vs->clientds.pf.bshift) & vs->clientds.pf.bmax; |
1308 |
color->red = ((red * 255 + vs->clientds.pf.rmax / 2) / |
1309 |
vs->clientds.pf.rmax); |
1310 |
color->green = ((green * 255 + vs->clientds.pf.gmax / 2) / |
1311 |
vs->clientds.pf.gmax); |
1312 |
color->blue = ((blue * 255 + vs->clientds.pf.bmax / 2) / |
1313 |
vs->clientds.pf.bmax); |
1314 |
} |
1315 |
} |
1316 |
|
1317 |
static void png_write_data(png_structp png_ptr, png_bytep data, |
1318 |
png_size_t length) |
1319 |
{ |
1320 |
VncState *vs = png_get_io_ptr(png_ptr); |
1321 |
|
1322 |
buffer_reserve(&vs->tight.png, vs->tight.png.offset + length); |
1323 |
memcpy(vs->tight.png.buffer + vs->tight.png.offset, data, length); |
1324 |
|
1325 |
vs->tight.png.offset += length; |
1326 |
} |
1327 |
|
1328 |
static void png_flush_data(png_structp png_ptr) |
1329 |
{ |
1330 |
} |
1331 |
|
1332 |
static void *vnc_png_malloc(png_structp png_ptr, png_size_t size) |
1333 |
{ |
1334 |
return qemu_malloc(size);
|
1335 |
} |
1336 |
|
1337 |
static void vnc_png_free(png_structp png_ptr, png_voidp ptr) |
1338 |
{ |
1339 |
qemu_free(ptr); |
1340 |
} |
1341 |
|
1342 |
static int send_png_rect(VncState *vs, int x, int y, int w, int h, |
1343 |
VncPalette *palette) |
1344 |
{ |
1345 |
png_byte color_type; |
1346 |
png_structp png_ptr; |
1347 |
png_infop info_ptr; |
1348 |
png_colorp png_palette = NULL;
|
1349 |
size_t offset; |
1350 |
int level = tight_png_conf[vs->tight.compression].png_zlib_level;
|
1351 |
int filters = tight_png_conf[vs->tight.compression].png_filters;
|
1352 |
uint8_t *buf; |
1353 |
int dy;
|
1354 |
|
1355 |
png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, |
1356 |
NULL, vnc_png_malloc, vnc_png_free);
|
1357 |
|
1358 |
if (png_ptr == NULL) |
1359 |
return -1; |
1360 |
|
1361 |
info_ptr = png_create_info_struct(png_ptr); |
1362 |
|
1363 |
if (info_ptr == NULL) { |
1364 |
png_destroy_write_struct(&png_ptr, NULL);
|
1365 |
return -1; |
1366 |
} |
1367 |
|
1368 |
png_set_write_fn(png_ptr, (void *) vs, png_write_data, png_flush_data);
|
1369 |
png_set_compression_level(png_ptr, level); |
1370 |
png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters); |
1371 |
|
1372 |
if (palette) {
|
1373 |
color_type = PNG_COLOR_TYPE_PALETTE; |
1374 |
} else {
|
1375 |
color_type = PNG_COLOR_TYPE_RGB; |
1376 |
} |
1377 |
|
1378 |
png_set_IHDR(png_ptr, info_ptr, w, h, |
1379 |
8, color_type, PNG_INTERLACE_NONE,
|
1380 |
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); |
1381 |
|
1382 |
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
1383 |
struct palette_cb_priv priv;
|
1384 |
|
1385 |
png_palette = png_malloc(png_ptr, sizeof(*png_palette) *
|
1386 |
palette_size(palette)); |
1387 |
|
1388 |
priv.vs = vs; |
1389 |
priv.png_palette = png_palette; |
1390 |
palette_iter(palette, write_png_palette, &priv); |
1391 |
|
1392 |
png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette)); |
1393 |
|
1394 |
offset = vs->tight.tight.offset; |
1395 |
if (vs->clientds.pf.bytes_per_pixel == 4) { |
1396 |
tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette); |
1397 |
} else {
|
1398 |
tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette); |
1399 |
} |
1400 |
} |
1401 |
|
1402 |
png_write_info(png_ptr, info_ptr); |
1403 |
|
1404 |
buffer_reserve(&vs->tight.png, 2048);
|
1405 |
buf = qemu_malloc(w * 3);
|
1406 |
for (dy = 0; dy < h; dy++) |
1407 |
{ |
1408 |
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
1409 |
memcpy(buf, vs->tight.tight.buffer + (dy * w), w); |
1410 |
} else {
|
1411 |
rgb_prepare_row(vs, buf, x, y + dy, w); |
1412 |
} |
1413 |
png_write_row(png_ptr, buf); |
1414 |
} |
1415 |
qemu_free(buf); |
1416 |
|
1417 |
png_write_end(png_ptr, NULL);
|
1418 |
|
1419 |
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
1420 |
png_free(png_ptr, png_palette); |
1421 |
} |
1422 |
|
1423 |
png_destroy_write_struct(&png_ptr, &info_ptr); |
1424 |
|
1425 |
vnc_write_u8(vs, VNC_TIGHT_PNG << 4);
|
1426 |
|
1427 |
tight_send_compact_size(vs, vs->tight.png.offset); |
1428 |
vnc_write(vs, vs->tight.png.buffer, vs->tight.png.offset); |
1429 |
buffer_reset(&vs->tight.png); |
1430 |
return 1; |
1431 |
} |
1432 |
#endif /* CONFIG_VNC_PNG */ |
1433 |
|
1434 |
static void vnc_tight_start(VncState *vs) |
1435 |
{ |
1436 |
buffer_reset(&vs->tight.tight); |
1437 |
|
1438 |
// make the output buffer be the zlib buffer, so we can compress it later
|
1439 |
vs->tight.tmp = vs->output; |
1440 |
vs->output = vs->tight.tight; |
1441 |
} |
1442 |
|
1443 |
static void vnc_tight_stop(VncState *vs) |
1444 |
{ |
1445 |
// switch back to normal output/zlib buffers
|
1446 |
vs->tight.tight = vs->output; |
1447 |
vs->output = vs->tight.tmp; |
1448 |
} |
1449 |
|
1450 |
static int send_sub_rect(VncState *vs, int x, int y, int w, int h) |
1451 |
{ |
1452 |
VncPalette *palette = NULL;
|
1453 |
uint32_t bg = 0, fg = 0; |
1454 |
int colors;
|
1455 |
int ret = 0; |
1456 |
|
1457 |
vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type); |
1458 |
|
1459 |
vnc_tight_start(vs); |
1460 |
vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
1461 |
vnc_tight_stop(vs); |
1462 |
|
1463 |
colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette); |
1464 |
|
1465 |
if (colors == 0) { |
1466 |
if (tight_detect_smooth_image(vs, w, h)) {
|
1467 |
if (vs->tight.quality == -1) { |
1468 |
ret = send_gradient_rect(vs, x, y, w, h); |
1469 |
} else {
|
1470 |
#ifdef CONFIG_VNC_JPEG
|
1471 |
int quality = tight_conf[vs->tight.quality].jpeg_quality;
|
1472 |
|
1473 |
ret = send_jpeg_rect(vs, x, y, w, h, quality); |
1474 |
#else
|
1475 |
ret = send_full_color_rect(vs, x, y, w, h); |
1476 |
#endif
|
1477 |
} |
1478 |
} else {
|
1479 |
ret = send_full_color_rect(vs, x, y, w, h); |
1480 |
} |
1481 |
} else if (colors == 1) { |
1482 |
ret = send_solid_rect(vs); |
1483 |
} else if (colors == 2) { |
1484 |
ret = send_mono_rect(vs, x, y, w, h, bg, fg); |
1485 |
} else if (colors <= 256) { |
1486 |
#ifdef CONFIG_VNC_JPEG
|
1487 |
if (colors > 96 && vs->tight.quality != -1 && vs->tight.quality <= 3 && |
1488 |
tight_detect_smooth_image(vs, w, h)) { |
1489 |
int quality = tight_conf[vs->tight.quality].jpeg_quality;
|
1490 |
|
1491 |
ret = send_jpeg_rect(vs, x, y, w, h, quality); |
1492 |
} else {
|
1493 |
ret = send_palette_rect(vs, x, y, w, h, palette); |
1494 |
} |
1495 |
#else
|
1496 |
ret = send_palette_rect(vs, x, y, w, h, palette); |
1497 |
#endif
|
1498 |
} |
1499 |
palette_destroy(palette); |
1500 |
return ret;
|
1501 |
} |
1502 |
|
1503 |
static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h) |
1504 |
{ |
1505 |
vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type); |
1506 |
|
1507 |
vnc_tight_start(vs); |
1508 |
vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
1509 |
vnc_tight_stop(vs); |
1510 |
|
1511 |
return send_solid_rect(vs);
|
1512 |
} |
1513 |
|
1514 |
static int send_rect_simple(VncState *vs, int x, int y, int w, int h) |
1515 |
{ |
1516 |
int max_size, max_width;
|
1517 |
int max_sub_width, max_sub_height;
|
1518 |
int dx, dy;
|
1519 |
int rw, rh;
|
1520 |
int n = 0; |
1521 |
|
1522 |
max_size = tight_conf[vs->tight.compression].max_rect_size; |
1523 |
max_width = tight_conf[vs->tight.compression].max_rect_width; |
1524 |
|
1525 |
if (w > max_width || w * h > max_size) {
|
1526 |
max_sub_width = (w > max_width) ? max_width : w; |
1527 |
max_sub_height = max_size / max_sub_width; |
1528 |
|
1529 |
for (dy = 0; dy < h; dy += max_sub_height) { |
1530 |
for (dx = 0; dx < w; dx += max_width) { |
1531 |
rw = MIN(max_sub_width, w - dx); |
1532 |
rh = MIN(max_sub_height, h - dy); |
1533 |
n += send_sub_rect(vs, x+dx, y+dy, rw, rh); |
1534 |
} |
1535 |
} |
1536 |
} else {
|
1537 |
n += send_sub_rect(vs, x, y, w, h); |
1538 |
} |
1539 |
|
1540 |
return n;
|
1541 |
} |
1542 |
|
1543 |
static int find_large_solid_color_rect(VncState *vs, int x, int y, |
1544 |
int w, int h, int max_rows) |
1545 |
{ |
1546 |
int dx, dy, dw, dh;
|
1547 |
int n = 0; |
1548 |
|
1549 |
/* Try to find large solid-color areas and send them separately. */
|
1550 |
|
1551 |
for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
1552 |
|
1553 |
/* If a rectangle becomes too large, send its upper part now. */
|
1554 |
|
1555 |
if (dy - y >= max_rows) {
|
1556 |
n += send_rect_simple(vs, x, y, w, max_rows); |
1557 |
y += max_rows; |
1558 |
h -= max_rows; |
1559 |
} |
1560 |
|
1561 |
dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy)); |
1562 |
|
1563 |
for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
1564 |
uint32_t color_value; |
1565 |
int x_best, y_best, w_best, h_best;
|
1566 |
|
1567 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx)); |
1568 |
|
1569 |
if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) { |
1570 |
continue ;
|
1571 |
} |
1572 |
|
1573 |
/* Get dimensions of solid-color area. */
|
1574 |
|
1575 |
find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y), |
1576 |
color_value, &w_best, &h_best); |
1577 |
|
1578 |
/* Make sure a solid rectangle is large enough
|
1579 |
(or the whole rectangle is of the same color). */
|
1580 |
|
1581 |
if (w_best * h_best != w * h &&
|
1582 |
w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) { |
1583 |
continue;
|
1584 |
} |
1585 |
|
1586 |
/* Try to extend solid rectangle to maximum size. */
|
1587 |
|
1588 |
x_best = dx; y_best = dy; |
1589 |
extend_solid_area(vs, x, y, w, h, color_value, |
1590 |
&x_best, &y_best, &w_best, &h_best); |
1591 |
|
1592 |
/* Send rectangles at top and left to solid-color area. */
|
1593 |
|
1594 |
if (y_best != y) {
|
1595 |
n += send_rect_simple(vs, x, y, w, y_best-y); |
1596 |
} |
1597 |
if (x_best != x) {
|
1598 |
n += tight_send_framebuffer_update(vs, x, y_best, |
1599 |
x_best-x, h_best); |
1600 |
} |
1601 |
|
1602 |
/* Send solid-color rectangle. */
|
1603 |
n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best); |
1604 |
|
1605 |
/* Send remaining rectangles (at right and bottom). */
|
1606 |
|
1607 |
if (x_best + w_best != x + w) {
|
1608 |
n += tight_send_framebuffer_update(vs, x_best+w_best, |
1609 |
y_best, |
1610 |
w-(x_best-x)-w_best, |
1611 |
h_best); |
1612 |
} |
1613 |
if (y_best + h_best != y + h) {
|
1614 |
n += tight_send_framebuffer_update(vs, x, y_best+h_best, |
1615 |
w, h-(y_best-y)-h_best); |
1616 |
} |
1617 |
|
1618 |
/* Return after all recursive calls are done. */
|
1619 |
return n;
|
1620 |
} |
1621 |
} |
1622 |
return n + send_rect_simple(vs, x, y, w, h);
|
1623 |
} |
1624 |
|
1625 |
static int tight_send_framebuffer_update(VncState *vs, int x, int y, |
1626 |
int w, int h) |
1627 |
{ |
1628 |
int max_rows;
|
1629 |
|
1630 |
if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF && |
1631 |
vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) { |
1632 |
vs->tight.pixel24 = true;
|
1633 |
} else {
|
1634 |
vs->tight.pixel24 = false;
|
1635 |
} |
1636 |
|
1637 |
if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE)
|
1638 |
return send_rect_simple(vs, x, y, w, h);
|
1639 |
|
1640 |
/* Calculate maximum number of rows in one non-solid rectangle. */
|
1641 |
|
1642 |
max_rows = tight_conf[vs->tight.compression].max_rect_size; |
1643 |
max_rows /= MIN(tight_conf[vs->tight.compression].max_rect_width, w); |
1644 |
|
1645 |
return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
|
1646 |
} |
1647 |
|
1648 |
int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, |
1649 |
int w, int h) |
1650 |
{ |
1651 |
vs->tight.type = VNC_ENCODING_TIGHT; |
1652 |
return tight_send_framebuffer_update(vs, x, y, w, h);
|
1653 |
} |
1654 |
|
1655 |
int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, |
1656 |
int w, int h) |
1657 |
{ |
1658 |
vs->tight.type = VNC_ENCODING_TIGHT_PNG; |
1659 |
return tight_send_framebuffer_update(vs, x, y, w, h);
|
1660 |
} |
1661 |
|
1662 |
void vnc_tight_clear(VncState *vs)
|
1663 |
{ |
1664 |
int i;
|
1665 |
for (i=0; i<ARRAY_SIZE(vs->tight.stream); i++) { |
1666 |
if (vs->tight.stream[i].opaque) {
|
1667 |
deflateEnd(&vs->tight.stream[i]); |
1668 |
} |
1669 |
} |
1670 |
|
1671 |
buffer_free(&vs->tight.tight); |
1672 |
buffer_free(&vs->tight.zlib); |
1673 |
buffer_free(&vs->tight.gradient); |
1674 |
#ifdef CONFIG_VNC_JPEG
|
1675 |
buffer_free(&vs->tight.jpeg); |
1676 |
#endif
|
1677 |
} |