root / ui / vnc-encoding-tight.c @ 3e230dd2
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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 "qemu-common.h" |
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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 "bswap.h" |
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#include "qdict.h" |
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#include "qint.h" |
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#include "vnc.h" |
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#include "vnc-encoding-tight.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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/*
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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.buffer; |
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|
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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.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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static void tight_palette_rgb2buf(uint32_t rgb, int bpp, uint8_t buf[6]) |
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{
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memset(buf, 0, 6); |
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if (bpp == 32) { |
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buf[0] = ((rgb >> 24) & 0xFF); |
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buf[1] = ((rgb >> 16) & 0xFF); |
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buf[2] = ((rgb >> 8) & 0xFF); |
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buf[3] = ((rgb >> 0) & 0xFF); |
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buf[4] = ((buf[0] & 1) == 0) << 3 | ((buf[1] & 1) == 0) << 2; |
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buf[4]|= ((buf[2] & 1) == 0) << 1 | ((buf[3] & 1) == 0) << 0; |
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buf[0] |= 1; |
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buf[1] |= 1; |
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buf[2] |= 1; |
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buf[3] |= 1; |
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} |
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if (bpp == 16) { |
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buf[0] = ((rgb >> 8) & 0xFF); |
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buf[1] = ((rgb >> 0) & 0xFF); |
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buf[2] = ((buf[0] & 1) == 0) << 1 | ((buf[1] & 1) == 0) << 0; |
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buf[0] |= 1; |
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buf[1] |= 1; |
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} |
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} |
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static uint32_t tight_palette_buf2rgb(int bpp, const uint8_t *buf) |
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{
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uint32_t rgb = 0;
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|
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if (bpp == 32) { |
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rgb |= ((buf[0] & ~1) | !((buf[4] >> 3) & 1)) << 24; |
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rgb |= ((buf[1] & ~1) | !((buf[4] >> 2) & 1)) << 16; |
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rgb |= ((buf[2] & ~1) | !((buf[4] >> 1) & 1)) << 8; |
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rgb |= ((buf[3] & ~1) | !((buf[4] >> 0) & 1)) << 0; |
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} |
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if (bpp == 16) { |
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rgb |= ((buf[0] & ~1) | !((buf[2] >> 1) & 1)) << 8; |
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rgb |= ((buf[1] & ~1) | !((buf[2] >> 0) & 1)) << 0; |
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} |
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return rgb;
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} |
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|
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static int tight_palette_insert(QDict *palette, uint32_t rgb, int bpp, int max) |
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{
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uint8_t key[6];
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int idx = qdict_size(palette);
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bool present;
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tight_palette_rgb2buf(rgb, bpp, key); |
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present = qdict_haskey(palette, (char *)key);
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if (idx >= max && !present) {
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return 0; |
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} |
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if (!present) {
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qdict_put(palette, (char *)key, qint_from_int(idx));
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} |
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return qdict_size(palette);
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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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struct QDict **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.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 = qdict_new(); \ |
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tight_palette_insert(*palette, c0, bpp, max); \ |
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tight_palette_insert(*palette, c1, bpp, max); \ |
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tight_palette_insert(*palette, ci, bpp, max); \ |
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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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if (!tight_palette_insert(*palette, (uint32_t)ci, \
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bpp, max)) { \
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return 0; \ |
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} \ |
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ci = data[i]; \ |
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} \ |
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} \ |
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\ |
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return qdict_size(*palette); \
|
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} |
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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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|
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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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struct QDict **palette)
|
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{
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int max;
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|
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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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} |
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|
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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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} |
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return 0; |
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} |
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|
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/* Callback to dump a palette with qdict_iter
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static void print_palette(const char *key, QObject *obj, void *opaque)
|
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{
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uint8_t idx = qint_get_int(qobject_to_qint(obj));
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uint32_t rgb = tight_palette_buf2rgb(32, (uint8_t *)key);
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|
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fprintf(stderr, "%.2x ", (unsigned char)*key);
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while (*key++)
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fprintf(stderr, "%.2x ", (unsigned char)*key);
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|
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fprintf(stderr, ": idx: %x rgb: %x\n", idx, rgb);
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}
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*/
|
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|
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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) \
|
| 456 |
\ |
| 457 |
static void \ |
| 458 |
tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \ |
| 459 |
struct QDict *palette) { \
|
| 460 |
uint##bpp##_t *src; \ |
| 461 |
uint##bpp##_t rgb; \ |
| 462 |
uint8_t key[6]; \
|
| 463 |
int i, rep; \
|
| 464 |
uint8_t idx; \ |
| 465 |
\ |
| 466 |
src = (uint##bpp##_t *) buf; \ |
| 467 |
\ |
| 468 |
for (i = 0; i < count; i++) { \ |
| 469 |
rgb = *src++; \ |
| 470 |
rep = 0; \
|
| 471 |
while (i < count && *src == rgb) { \
|
| 472 |
rep++, src++, i++; \ |
| 473 |
} \ |
| 474 |
tight_palette_rgb2buf(rgb, bpp, key); \ |
| 475 |
if (!qdict_haskey(palette, (char *)key)) { \ |
| 476 |
/* \
|
| 477 |
* Should never happen, but don't break everything \
|
| 478 |
* if it does, use the first color instead \
|
| 479 |
*/ \
|
| 480 |
idx = 0; \
|
| 481 |
} else { \
|
| 482 |
idx = qdict_get_int(palette, (char *)key); \
|
| 483 |
} \ |
| 484 |
while (rep >= 0) { \ |
| 485 |
*buf++ = idx; \ |
| 486 |
rep--; \ |
| 487 |
} \ |
| 488 |
} \ |
| 489 |
} |
| 490 |
|
| 491 |
DEFINE_IDX_ENCODE_FUNCTION(16)
|
| 492 |
DEFINE_IDX_ENCODE_FUNCTION(32)
|
| 493 |
|
| 494 |
#define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
|
| 495 |
\ |
| 496 |
static void \ |
| 497 |
tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \ |
| 498 |
uint##bpp##_t bg, uint##bpp##_t fg) { \ |
| 499 |
uint##bpp##_t *ptr; \ |
| 500 |
unsigned int value, mask; \ |
| 501 |
int aligned_width; \
|
| 502 |
int x, y, bg_bits; \
|
| 503 |
\ |
| 504 |
ptr = (uint##bpp##_t *) buf; \ |
| 505 |
aligned_width = w - w % 8; \
|
| 506 |
\ |
| 507 |
for (y = 0; y < h; y++) { \ |
| 508 |
for (x = 0; x < aligned_width; x += 8) { \ |
| 509 |
for (bg_bits = 0; bg_bits < 8; bg_bits++) { \ |
| 510 |
if (*ptr++ != bg) { \
|
| 511 |
break; \
|
| 512 |
} \ |
| 513 |
} \ |
| 514 |
if (bg_bits == 8) { \ |
| 515 |
*buf++ = 0; \
|
| 516 |
continue; \
|
| 517 |
} \ |
| 518 |
mask = 0x80 >> bg_bits; \
|
| 519 |
value = mask; \ |
| 520 |
for (bg_bits++; bg_bits < 8; bg_bits++) { \ |
| 521 |
mask >>= 1; \
|
| 522 |
if (*ptr++ != bg) { \
|
| 523 |
value |= mask; \ |
| 524 |
} \ |
| 525 |
} \ |
| 526 |
*buf++ = (uint8_t)value; \ |
| 527 |
} \ |
| 528 |
\ |
| 529 |
mask = 0x80; \
|
| 530 |
value = 0; \
|
| 531 |
if (x >= w) { \
|
| 532 |
continue; \
|
| 533 |
} \ |
| 534 |
\ |
| 535 |
for (; x < w; x++) { \
|
| 536 |
if (*ptr++ != bg) { \
|
| 537 |
value |= mask; \ |
| 538 |
} \ |
| 539 |
mask >>= 1; \
|
| 540 |
} \ |
| 541 |
*buf++ = (uint8_t)value; \ |
| 542 |
} \ |
| 543 |
} |
| 544 |
|
| 545 |
DEFINE_MONO_ENCODE_FUNCTION(8)
|
| 546 |
DEFINE_MONO_ENCODE_FUNCTION(16)
|
| 547 |
DEFINE_MONO_ENCODE_FUNCTION(32)
|
| 548 |
|
| 549 |
/*
|
| 550 |
* ``Gradient'' filter for 24-bit color samples.
|
| 551 |
* Should be called only when redMax, greenMax and blueMax are 255.
|
| 552 |
* Color components assumed to be byte-aligned.
|
| 553 |
*/
|
| 554 |
|
| 555 |
static void |
| 556 |
tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h) |
| 557 |
{
|
| 558 |
uint32_t *buf32; |
| 559 |
uint32_t pix32; |
| 560 |
int shift[3]; |
| 561 |
int *prev;
|
| 562 |
int here[3], upper[3], left[3], upperleft[3]; |
| 563 |
int prediction;
|
| 564 |
int x, y, c;
|
| 565 |
|
| 566 |
buf32 = (uint32_t *)buf; |
| 567 |
memset(vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); |
| 568 |
|
| 569 |
if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
|
| 570 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
|
| 571 |
shift[0] = vs->clientds.pf.rshift;
|
| 572 |
shift[1] = vs->clientds.pf.gshift;
|
| 573 |
shift[2] = vs->clientds.pf.bshift;
|
| 574 |
} else {
|
| 575 |
shift[0] = 24 - vs->clientds.pf.rshift; |
| 576 |
shift[1] = 24 - vs->clientds.pf.gshift; |
| 577 |
shift[2] = 24 - vs->clientds.pf.bshift; |
| 578 |
} |
| 579 |
|
| 580 |
for (y = 0; y < h; y++) { |
| 581 |
for (c = 0; c < 3; c++) { |
| 582 |
upper[c] = 0;
|
| 583 |
here[c] = 0;
|
| 584 |
} |
| 585 |
prev = (int *)vs->tight_gradient.buffer;
|
| 586 |
for (x = 0; x < w; x++) { |
| 587 |
pix32 = *buf32++; |
| 588 |
for (c = 0; c < 3; c++) { |
| 589 |
upperleft[c] = upper[c]; |
| 590 |
left[c] = here[c]; |
| 591 |
upper[c] = *prev; |
| 592 |
here[c] = (int)(pix32 >> shift[c] & 0xFF); |
| 593 |
*prev++ = here[c]; |
| 594 |
|
| 595 |
prediction = left[c] + upper[c] - upperleft[c]; |
| 596 |
if (prediction < 0) { |
| 597 |
prediction = 0;
|
| 598 |
} else if (prediction > 0xFF) { |
| 599 |
prediction = 0xFF;
|
| 600 |
} |
| 601 |
*buf++ = (char)(here[c] - prediction);
|
| 602 |
} |
| 603 |
} |
| 604 |
} |
| 605 |
} |
| 606 |
|
| 607 |
|
| 608 |
/*
|
| 609 |
* ``Gradient'' filter for other color depths.
|
| 610 |
*/
|
| 611 |
|
| 612 |
#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
|
| 613 |
\ |
| 614 |
static void \ |
| 615 |
tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \ |
| 616 |
int w, int h) { \ |
| 617 |
uint##bpp##_t pix, diff; \ |
| 618 |
bool endian; \
|
| 619 |
int *prev; \
|
| 620 |
int max[3], shift[3]; \ |
| 621 |
int here[3], upper[3], left[3], upperleft[3]; \ |
| 622 |
int prediction; \
|
| 623 |
int x, y, c; \
|
| 624 |
\ |
| 625 |
memset (vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); \ |
| 626 |
\ |
| 627 |
endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \ |
| 628 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \ |
| 629 |
\ |
| 630 |
max[0] = vs->clientds.pf.rmax; \
|
| 631 |
max[1] = vs->clientds.pf.gmax; \
|
| 632 |
max[2] = vs->clientds.pf.bmax; \
|
| 633 |
shift[0] = vs->clientds.pf.rshift; \
|
| 634 |
shift[1] = vs->clientds.pf.gshift; \
|
| 635 |
shift[2] = vs->clientds.pf.bshift; \
|
| 636 |
\ |
| 637 |
for (y = 0; y < h; y++) { \ |
| 638 |
for (c = 0; c < 3; c++) { \ |
| 639 |
upper[c] = 0; \
|
| 640 |
here[c] = 0; \
|
| 641 |
} \ |
| 642 |
prev = (int *)vs->tight_gradient.buffer; \
|
| 643 |
for (x = 0; x < w; x++) { \ |
| 644 |
pix = *buf; \ |
| 645 |
if (endian) { \
|
| 646 |
pix = bswap_##bpp(pix); \ |
| 647 |
} \ |
| 648 |
diff = 0; \
|
| 649 |
for (c = 0; c < 3; c++) { \ |
| 650 |
upperleft[c] = upper[c]; \ |
| 651 |
left[c] = here[c]; \ |
| 652 |
upper[c] = *prev; \ |
| 653 |
here[c] = (int)(pix >> shift[c] & max[c]); \
|
| 654 |
*prev++ = here[c]; \ |
| 655 |
\ |
| 656 |
prediction = left[c] + upper[c] - upperleft[c]; \ |
| 657 |
if (prediction < 0) { \ |
| 658 |
prediction = 0; \
|
| 659 |
} else if (prediction > max[c]) { \ |
| 660 |
prediction = max[c]; \ |
| 661 |
} \ |
| 662 |
diff |= ((here[c] - prediction) & max[c]) \ |
| 663 |
<< shift[c]; \ |
| 664 |
} \ |
| 665 |
if (endian) { \
|
| 666 |
diff = bswap_##bpp(diff); \ |
| 667 |
} \ |
| 668 |
*buf++ = diff; \ |
| 669 |
} \ |
| 670 |
} \ |
| 671 |
} |
| 672 |
|
| 673 |
DEFINE_GRADIENT_FILTER_FUNCTION(16)
|
| 674 |
DEFINE_GRADIENT_FILTER_FUNCTION(32)
|
| 675 |
|
| 676 |
/*
|
| 677 |
* Check if a rectangle is all of the same color. If needSameColor is
|
| 678 |
* set to non-zero, then also check that its color equals to the
|
| 679 |
* *colorPtr value. The result is 1 if the test is successfull, and in
|
| 680 |
* that case new color will be stored in *colorPtr.
|
| 681 |
*/
|
| 682 |
|
| 683 |
#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
|
| 684 |
\ |
| 685 |
static bool \ |
| 686 |
check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \ |
| 687 |
uint32_t* color, bool samecolor) \
|
| 688 |
{ \
|
| 689 |
VncDisplay *vd = vs->vd; \ |
| 690 |
uint##bpp##_t *fbptr; \ |
| 691 |
uint##bpp##_t c; \ |
| 692 |
int dx, dy; \
|
| 693 |
\ |
| 694 |
fbptr = (uint##bpp##_t *) \ |
| 695 |
(vd->server->data + y * ds_get_linesize(vs->ds) + \ |
| 696 |
x * ds_get_bytes_per_pixel(vs->ds)); \ |
| 697 |
\ |
| 698 |
c = *fbptr; \ |
| 699 |
if (samecolor && (uint32_t)c != *color) { \
|
| 700 |
return false; \ |
| 701 |
} \ |
| 702 |
\ |
| 703 |
for (dy = 0; dy < h; dy++) { \ |
| 704 |
for (dx = 0; dx < w; dx++) { \ |
| 705 |
if (c != fbptr[dx]) { \
|
| 706 |
return false; \ |
| 707 |
} \ |
| 708 |
} \ |
| 709 |
fbptr = (uint##bpp##_t *) \ |
| 710 |
((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \ |
| 711 |
} \ |
| 712 |
\ |
| 713 |
*color = (uint32_t)c; \ |
| 714 |
return true; \ |
| 715 |
} |
| 716 |
|
| 717 |
DEFINE_CHECK_SOLID_FUNCTION(32)
|
| 718 |
DEFINE_CHECK_SOLID_FUNCTION(16)
|
| 719 |
DEFINE_CHECK_SOLID_FUNCTION(8)
|
| 720 |
|
| 721 |
static bool check_solid_tile(VncState *vs, int x, int y, int w, int h, |
| 722 |
uint32_t* color, bool samecolor)
|
| 723 |
{
|
| 724 |
VncDisplay *vd = vs->vd; |
| 725 |
|
| 726 |
switch(vd->server->pf.bytes_per_pixel) {
|
| 727 |
case 4: |
| 728 |
return check_solid_tile32(vs, x, y, w, h, color, samecolor);
|
| 729 |
case 2: |
| 730 |
return check_solid_tile16(vs, x, y, w, h, color, samecolor);
|
| 731 |
default:
|
| 732 |
return check_solid_tile8(vs, x, y, w, h, color, samecolor);
|
| 733 |
} |
| 734 |
} |
| 735 |
|
| 736 |
static void find_best_solid_area(VncState *vs, int x, int y, int w, int h, |
| 737 |
uint32_t color, int *w_ptr, int *h_ptr) |
| 738 |
{
|
| 739 |
int dx, dy, dw, dh;
|
| 740 |
int w_prev;
|
| 741 |
int w_best = 0, h_best = 0; |
| 742 |
|
| 743 |
w_prev = w; |
| 744 |
|
| 745 |
for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
| 746 |
|
| 747 |
dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy); |
| 748 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev); |
| 749 |
|
| 750 |
if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) { |
| 751 |
break;
|
| 752 |
} |
| 753 |
|
| 754 |
for (dx = x + dw; dx < x + w_prev;) {
|
| 755 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx); |
| 756 |
|
| 757 |
if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) { |
| 758 |
break;
|
| 759 |
} |
| 760 |
dx += dw; |
| 761 |
} |
| 762 |
|
| 763 |
w_prev = dx - x; |
| 764 |
if (w_prev * (dy + dh - y) > w_best * h_best) {
|
| 765 |
w_best = w_prev; |
| 766 |
h_best = dy + dh - y; |
| 767 |
} |
| 768 |
} |
| 769 |
|
| 770 |
*w_ptr = w_best; |
| 771 |
*h_ptr = h_best; |
| 772 |
} |
| 773 |
|
| 774 |
static void extend_solid_area(VncState *vs, int x, int y, int w, int h, |
| 775 |
uint32_t color, int *x_ptr, int *y_ptr, |
| 776 |
int *w_ptr, int *h_ptr) |
| 777 |
{
|
| 778 |
int cx, cy;
|
| 779 |
|
| 780 |
/* Try to extend the area upwards. */
|
| 781 |
for ( cy = *y_ptr - 1; |
| 782 |
cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| 783 |
cy-- ); |
| 784 |
*h_ptr += *y_ptr - (cy + 1);
|
| 785 |
*y_ptr = cy + 1;
|
| 786 |
|
| 787 |
/* ... downwards. */
|
| 788 |
for ( cy = *y_ptr + *h_ptr;
|
| 789 |
cy < y + h && |
| 790 |
check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| 791 |
cy++ ); |
| 792 |
*h_ptr += cy - (*y_ptr + *h_ptr); |
| 793 |
|
| 794 |
/* ... to the left. */
|
| 795 |
for ( cx = *x_ptr - 1; |
| 796 |
cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| 797 |
cx-- ); |
| 798 |
*w_ptr += *x_ptr - (cx + 1);
|
| 799 |
*x_ptr = cx + 1;
|
| 800 |
|
| 801 |
/* ... to the right. */
|
| 802 |
for ( cx = *x_ptr + *w_ptr;
|
| 803 |
cx < x + w && |
| 804 |
check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| 805 |
cx++ ); |
| 806 |
*w_ptr += cx - (*x_ptr + *w_ptr); |
| 807 |
} |
| 808 |
|
| 809 |
static int tight_init_stream(VncState *vs, int stream_id, |
| 810 |
int level, int strategy) |
| 811 |
{
|
| 812 |
z_streamp zstream = &vs->tight_stream[stream_id]; |
| 813 |
|
| 814 |
if (zstream->opaque == NULL) { |
| 815 |
int err;
|
| 816 |
|
| 817 |
VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
|
| 818 |
VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
|
| 819 |
zstream->zalloc = vnc_zlib_zalloc; |
| 820 |
zstream->zfree = vnc_zlib_zfree; |
| 821 |
|
| 822 |
err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS, |
| 823 |
MAX_MEM_LEVEL, strategy); |
| 824 |
|
| 825 |
if (err != Z_OK) {
|
| 826 |
fprintf(stderr, "VNC: error initializing zlib\n");
|
| 827 |
return -1; |
| 828 |
} |
| 829 |
|
| 830 |
vs->tight_levels[stream_id] = level; |
| 831 |
zstream->opaque = vs; |
| 832 |
} |
| 833 |
|
| 834 |
if (vs->tight_levels[stream_id] != level) {
|
| 835 |
if (deflateParams(zstream, level, strategy) != Z_OK) {
|
| 836 |
return -1; |
| 837 |
} |
| 838 |
vs->tight_levels[stream_id] = level; |
| 839 |
} |
| 840 |
return 0; |
| 841 |
} |
| 842 |
|
| 843 |
static void tight_send_compact_size(VncState *vs, size_t len) |
| 844 |
{
|
| 845 |
int lpc = 0; |
| 846 |
int bytes = 0; |
| 847 |
char buf[3] = {0, 0, 0}; |
| 848 |
|
| 849 |
buf[bytes++] = len & 0x7F;
|
| 850 |
if (len > 0x7F) { |
| 851 |
buf[bytes-1] |= 0x80; |
| 852 |
buf[bytes++] = (len >> 7) & 0x7F; |
| 853 |
if (len > 0x3FFF) { |
| 854 |
buf[bytes-1] |= 0x80; |
| 855 |
buf[bytes++] = (len >> 14) & 0xFF; |
| 856 |
} |
| 857 |
} |
| 858 |
for (lpc = 0; lpc < bytes; lpc++) { |
| 859 |
vnc_write_u8(vs, buf[lpc]); |
| 860 |
} |
| 861 |
} |
| 862 |
|
| 863 |
static int tight_compress_data(VncState *vs, int stream_id, size_t bytes, |
| 864 |
int level, int strategy) |
| 865 |
{
|
| 866 |
z_streamp zstream = &vs->tight_stream[stream_id]; |
| 867 |
int previous_out;
|
| 868 |
|
| 869 |
if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
|
| 870 |
vnc_write(vs, vs->tight.buffer, vs->tight.offset); |
| 871 |
return bytes;
|
| 872 |
} |
| 873 |
|
| 874 |
if (tight_init_stream(vs, stream_id, level, strategy)) {
|
| 875 |
return -1; |
| 876 |
} |
| 877 |
|
| 878 |
/* reserve memory in output buffer */
|
| 879 |
buffer_reserve(&vs->tight_zlib, bytes + 64);
|
| 880 |
|
| 881 |
/* set pointers */
|
| 882 |
zstream->next_in = vs->tight.buffer; |
| 883 |
zstream->avail_in = vs->tight.offset; |
| 884 |
zstream->next_out = vs->tight_zlib.buffer + vs->tight_zlib.offset; |
| 885 |
zstream->avail_out = vs->tight_zlib.capacity - vs->tight_zlib.offset; |
| 886 |
zstream->data_type = Z_BINARY; |
| 887 |
previous_out = zstream->total_out; |
| 888 |
|
| 889 |
/* start encoding */
|
| 890 |
if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
|
| 891 |
fprintf(stderr, "VNC: error during tight compression\n");
|
| 892 |
return -1; |
| 893 |
} |
| 894 |
|
| 895 |
vs->tight_zlib.offset = vs->tight_zlib.capacity - zstream->avail_out; |
| 896 |
bytes = zstream->total_out - previous_out; |
| 897 |
|
| 898 |
tight_send_compact_size(vs, bytes); |
| 899 |
vnc_write(vs, vs->tight_zlib.buffer, bytes); |
| 900 |
|
| 901 |
buffer_reset(&vs->tight_zlib); |
| 902 |
|
| 903 |
return bytes;
|
| 904 |
} |
| 905 |
|
| 906 |
/*
|
| 907 |
* Subencoding implementations.
|
| 908 |
*/
|
| 909 |
static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret) |
| 910 |
{
|
| 911 |
uint32_t *buf32; |
| 912 |
uint32_t pix; |
| 913 |
int rshift, gshift, bshift;
|
| 914 |
|
| 915 |
buf32 = (uint32_t *)buf; |
| 916 |
|
| 917 |
if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
|
| 918 |
(vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
|
| 919 |
rshift = vs->clientds.pf.rshift; |
| 920 |
gshift = vs->clientds.pf.gshift; |
| 921 |
bshift = vs->clientds.pf.bshift; |
| 922 |
} else {
|
| 923 |
rshift = 24 - vs->clientds.pf.rshift;
|
| 924 |
gshift = 24 - vs->clientds.pf.gshift;
|
| 925 |
bshift = 24 - vs->clientds.pf.bshift;
|
| 926 |
} |
| 927 |
|
| 928 |
if (ret) {
|
| 929 |
*ret = count * 3;
|
| 930 |
} |
| 931 |
|
| 932 |
while (count--) {
|
| 933 |
pix = *buf32++; |
| 934 |
*buf++ = (char)(pix >> rshift);
|
| 935 |
*buf++ = (char)(pix >> gshift);
|
| 936 |
*buf++ = (char)(pix >> bshift);
|
| 937 |
} |
| 938 |
} |
| 939 |
|
| 940 |
static int send_full_color_rect(VncState *vs, int w, int h) |
| 941 |
{
|
| 942 |
int stream = 0; |
| 943 |
size_t bytes; |
| 944 |
|
| 945 |
vnc_write_u8(vs, stream << 4); /* no flushing, no filter */ |
| 946 |
|
| 947 |
if (vs->tight_pixel24) {
|
| 948 |
tight_pack24(vs, vs->tight.buffer, w * h, &vs->tight.offset); |
| 949 |
bytes = 3;
|
| 950 |
} else {
|
| 951 |
bytes = vs->clientds.pf.bytes_per_pixel; |
| 952 |
} |
| 953 |
|
| 954 |
bytes = tight_compress_data(vs, stream, w * h * bytes, |
| 955 |
tight_conf[vs->tight_compression].raw_zlib_level, |
| 956 |
Z_DEFAULT_STRATEGY); |
| 957 |
|
| 958 |
return (bytes >= 0); |
| 959 |
} |
| 960 |
|
| 961 |
static int send_solid_rect(VncState *vs) |
| 962 |
{
|
| 963 |
size_t bytes; |
| 964 |
|
| 965 |
vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */ |
| 966 |
|
| 967 |
if (vs->tight_pixel24) {
|
| 968 |
tight_pack24(vs, vs->tight.buffer, 1, &vs->tight.offset);
|
| 969 |
bytes = 3;
|
| 970 |
} else {
|
| 971 |
bytes = vs->clientds.pf.bytes_per_pixel; |
| 972 |
} |
| 973 |
|
| 974 |
vnc_write(vs, vs->tight.buffer, bytes); |
| 975 |
return 1; |
| 976 |
} |
| 977 |
|
| 978 |
static int send_mono_rect(VncState *vs, int w, int h, uint32_t bg, uint32_t fg) |
| 979 |
{
|
| 980 |
size_t bytes; |
| 981 |
int stream = 1; |
| 982 |
int level = tight_conf[vs->tight_compression].mono_zlib_level;
|
| 983 |
|
| 984 |
bytes = ((w + 7) / 8) * h; |
| 985 |
|
| 986 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
| 987 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| 988 |
vnc_write_u8(vs, 1);
|
| 989 |
|
| 990 |
switch(vs->clientds.pf.bytes_per_pixel) {
|
| 991 |
case 4: |
| 992 |
{
|
| 993 |
uint32_t buf[2] = {bg, fg};
|
| 994 |
size_t ret = sizeof (buf);
|
| 995 |
|
| 996 |
if (vs->tight_pixel24) {
|
| 997 |
tight_pack24(vs, (unsigned char*)buf, 2, &ret); |
| 998 |
} |
| 999 |
vnc_write(vs, buf, ret); |
| 1000 |
|
| 1001 |
tight_encode_mono_rect32(vs->tight.buffer, w, h, bg, fg); |
| 1002 |
break;
|
| 1003 |
} |
| 1004 |
case 2: |
| 1005 |
vnc_write(vs, &bg, 2);
|
| 1006 |
vnc_write(vs, &fg, 2);
|
| 1007 |
tight_encode_mono_rect16(vs->tight.buffer, w, h, bg, fg); |
| 1008 |
break;
|
| 1009 |
default:
|
| 1010 |
vnc_write_u8(vs, bg); |
| 1011 |
vnc_write_u8(vs, fg); |
| 1012 |
tight_encode_mono_rect8(vs->tight.buffer, w, h, bg, fg); |
| 1013 |
break;
|
| 1014 |
} |
| 1015 |
vs->tight.offset = bytes; |
| 1016 |
|
| 1017 |
bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY); |
| 1018 |
return (bytes >= 0); |
| 1019 |
} |
| 1020 |
|
| 1021 |
struct palette_cb_priv {
|
| 1022 |
VncState *vs; |
| 1023 |
uint8_t *header; |
| 1024 |
}; |
| 1025 |
|
| 1026 |
static void write_palette(const char *key, QObject *obj, void *opaque) |
| 1027 |
{
|
| 1028 |
struct palette_cb_priv *priv = opaque;
|
| 1029 |
VncState *vs = priv->vs; |
| 1030 |
uint32_t bytes = vs->clientds.pf.bytes_per_pixel; |
| 1031 |
uint8_t idx = qint_get_int(qobject_to_qint(obj)); |
| 1032 |
|
| 1033 |
if (bytes == 4) { |
| 1034 |
uint32_t color = tight_palette_buf2rgb(32, (uint8_t *)key);
|
| 1035 |
|
| 1036 |
((uint32_t*)priv->header)[idx] = color; |
| 1037 |
} else {
|
| 1038 |
uint16_t color = tight_palette_buf2rgb(16, (uint8_t *)key);
|
| 1039 |
|
| 1040 |
((uint16_t*)priv->header)[idx] = color; |
| 1041 |
} |
| 1042 |
} |
| 1043 |
|
| 1044 |
static bool send_gradient_rect(VncState *vs, int w, int h) |
| 1045 |
{
|
| 1046 |
int stream = 3; |
| 1047 |
int level = tight_conf[vs->tight_compression].gradient_zlib_level;
|
| 1048 |
size_t bytes; |
| 1049 |
|
| 1050 |
if (vs->clientds.pf.bytes_per_pixel == 1) |
| 1051 |
return send_full_color_rect(vs, w, h);
|
| 1052 |
|
| 1053 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
| 1054 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT); |
| 1055 |
|
| 1056 |
buffer_reserve(&vs->tight_gradient, w * 3 * sizeof (int)); |
| 1057 |
|
| 1058 |
if (vs->tight_pixel24) {
|
| 1059 |
tight_filter_gradient24(vs, vs->tight.buffer, w, h); |
| 1060 |
bytes = 3;
|
| 1061 |
} else if (vs->clientds.pf.bytes_per_pixel == 4) { |
| 1062 |
tight_filter_gradient32(vs, (uint32_t *)vs->tight.buffer, w, h); |
| 1063 |
bytes = 4;
|
| 1064 |
} else {
|
| 1065 |
tight_filter_gradient16(vs, (uint16_t *)vs->tight.buffer, w, h); |
| 1066 |
bytes = 2;
|
| 1067 |
} |
| 1068 |
|
| 1069 |
buffer_reset(&vs->tight_gradient); |
| 1070 |
|
| 1071 |
bytes = w * h * bytes; |
| 1072 |
vs->tight.offset = bytes; |
| 1073 |
|
| 1074 |
bytes = tight_compress_data(vs, stream, bytes, |
| 1075 |
level, Z_FILTERED); |
| 1076 |
return (bytes >= 0); |
| 1077 |
} |
| 1078 |
|
| 1079 |
static int send_palette_rect(VncState *vs, int w, int h, struct QDict *palette) |
| 1080 |
{
|
| 1081 |
int stream = 2; |
| 1082 |
int level = tight_conf[vs->tight_compression].idx_zlib_level;
|
| 1083 |
int colors;
|
| 1084 |
size_t bytes; |
| 1085 |
|
| 1086 |
colors = qdict_size(palette); |
| 1087 |
|
| 1088 |
vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
|
| 1089 |
vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| 1090 |
vnc_write_u8(vs, colors - 1);
|
| 1091 |
|
| 1092 |
switch(vs->clientds.pf.bytes_per_pixel) {
|
| 1093 |
case 4: |
| 1094 |
{
|
| 1095 |
size_t old_offset, offset; |
| 1096 |
uint32_t header[qdict_size(palette)]; |
| 1097 |
struct palette_cb_priv priv = { vs, (uint8_t *)header };
|
| 1098 |
|
| 1099 |
old_offset = vs->output.offset; |
| 1100 |
qdict_iter(palette, write_palette, &priv); |
| 1101 |
vnc_write(vs, header, sizeof(header));
|
| 1102 |
|
| 1103 |
if (vs->tight_pixel24) {
|
| 1104 |
tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset); |
| 1105 |
vs->output.offset = old_offset + offset; |
| 1106 |
} |
| 1107 |
|
| 1108 |
tight_encode_indexed_rect32(vs->tight.buffer, w * h, palette); |
| 1109 |
break;
|
| 1110 |
} |
| 1111 |
case 2: |
| 1112 |
{
|
| 1113 |
uint16_t header[qdict_size(palette)]; |
| 1114 |
struct palette_cb_priv priv = { vs, (uint8_t *)header };
|
| 1115 |
|
| 1116 |
qdict_iter(palette, write_palette, &priv); |
| 1117 |
vnc_write(vs, header, sizeof(header));
|
| 1118 |
tight_encode_indexed_rect16(vs->tight.buffer, w * h, palette); |
| 1119 |
break;
|
| 1120 |
} |
| 1121 |
default:
|
| 1122 |
return -1; /* No palette for 8bits colors */ |
| 1123 |
break;
|
| 1124 |
} |
| 1125 |
bytes = w * h; |
| 1126 |
vs->tight.offset = bytes; |
| 1127 |
|
| 1128 |
bytes = tight_compress_data(vs, stream, bytes, |
| 1129 |
level, Z_DEFAULT_STRATEGY); |
| 1130 |
return (bytes >= 0); |
| 1131 |
} |
| 1132 |
|
| 1133 |
/*
|
| 1134 |
* JPEG compression stuff.
|
| 1135 |
*/
|
| 1136 |
#ifdef CONFIG_VNC_JPEG
|
| 1137 |
static void jpeg_prepare_row24(VncState *vs, uint8_t *dst, int x, int y, |
| 1138 |
int count)
|
| 1139 |
{
|
| 1140 |
VncDisplay *vd = vs->vd; |
| 1141 |
uint32_t *fbptr; |
| 1142 |
uint32_t pix; |
| 1143 |
|
| 1144 |
fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) + |
| 1145 |
x * ds_get_bytes_per_pixel(vs->ds)); |
| 1146 |
|
| 1147 |
while (count--) {
|
| 1148 |
pix = *fbptr++; |
| 1149 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift); |
| 1150 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift); |
| 1151 |
*dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift); |
| 1152 |
} |
| 1153 |
} |
| 1154 |
|
| 1155 |
#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \
|
| 1156 |
\ |
| 1157 |
static void \ |
| 1158 |
jpeg_prepare_row##bpp(VncState *vs, uint8_t *dst, \ |
| 1159 |
int x, int y, int count) \ |
| 1160 |
{ \
|
| 1161 |
VncDisplay *vd = vs->vd; \ |
| 1162 |
uint##bpp##_t *fbptr; \ |
| 1163 |
uint##bpp##_t pix; \ |
| 1164 |
int r, g, b; \
|
| 1165 |
\ |
| 1166 |
fbptr = (uint##bpp##_t *) \ |
| 1167 |
(vd->server->data + y * ds_get_linesize(vs->ds) + \ |
| 1168 |
x * ds_get_bytes_per_pixel(vs->ds)); \ |
| 1169 |
\ |
| 1170 |
while (count--) { \
|
| 1171 |
pix = *fbptr++; \ |
| 1172 |
\ |
| 1173 |
r = (int)((pix >> vs->ds->surface->pf.rshift) \
|
| 1174 |
& vs->ds->surface->pf.rmax); \ |
| 1175 |
g = (int)((pix >> vs->ds->surface->pf.gshift) \
|
| 1176 |
& vs->ds->surface->pf.gmax); \ |
| 1177 |
b = (int)((pix >> vs->ds->surface->pf.bshift) \
|
| 1178 |
& vs->ds->surface->pf.bmax); \ |
| 1179 |
\ |
| 1180 |
*dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \ |
| 1181 |
/ vs->ds->surface->pf.rmax); \ |
| 1182 |
*dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \ |
| 1183 |
/ vs->ds->surface->pf.gmax); \ |
| 1184 |
*dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \ |
| 1185 |
/ vs->ds->surface->pf.bmax); \ |
| 1186 |
} \ |
| 1187 |
} |
| 1188 |
|
| 1189 |
DEFINE_JPEG_GET_ROW_FUNCTION(16)
|
| 1190 |
DEFINE_JPEG_GET_ROW_FUNCTION(32)
|
| 1191 |
|
| 1192 |
static void jpeg_prepare_row(VncState *vs, uint8_t *dst, int x, int y, |
| 1193 |
int count)
|
| 1194 |
{
|
| 1195 |
if (vs->tight_pixel24)
|
| 1196 |
jpeg_prepare_row24(vs, dst, x, y, count); |
| 1197 |
else if (ds_get_bytes_per_pixel(vs->ds) == 4) |
| 1198 |
jpeg_prepare_row32(vs, dst, x, y, count); |
| 1199 |
else
|
| 1200 |
jpeg_prepare_row16(vs, dst, x, y, count); |
| 1201 |
} |
| 1202 |
|
| 1203 |
/*
|
| 1204 |
* Destination manager implementation for JPEG library.
|
| 1205 |
*/
|
| 1206 |
|
| 1207 |
/* This is called once per encoding */
|
| 1208 |
static void jpeg_init_destination(j_compress_ptr cinfo) |
| 1209 |
{
|
| 1210 |
VncState *vs = cinfo->client_data; |
| 1211 |
Buffer *buffer = &vs->tight_jpeg; |
| 1212 |
|
| 1213 |
cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset; |
| 1214 |
cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset); |
| 1215 |
} |
| 1216 |
|
| 1217 |
/* This is called when we ran out of buffer (shouldn't happen!) */
|
| 1218 |
static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
|
| 1219 |
{
|
| 1220 |
VncState *vs = cinfo->client_data; |
| 1221 |
Buffer *buffer = &vs->tight_jpeg; |
| 1222 |
|
| 1223 |
buffer->offset = buffer->capacity; |
| 1224 |
buffer_reserve(buffer, 2048);
|
| 1225 |
jpeg_init_destination(cinfo); |
| 1226 |
return TRUE;
|
| 1227 |
} |
| 1228 |
|
| 1229 |
/* This is called when we are done processing data */
|
| 1230 |
static void jpeg_term_destination(j_compress_ptr cinfo) |
| 1231 |
{
|
| 1232 |
VncState *vs = cinfo->client_data; |
| 1233 |
Buffer *buffer = &vs->tight_jpeg; |
| 1234 |
|
| 1235 |
buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer; |
| 1236 |
} |
| 1237 |
|
| 1238 |
static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality) |
| 1239 |
{
|
| 1240 |
struct jpeg_compress_struct cinfo;
|
| 1241 |
struct jpeg_error_mgr jerr;
|
| 1242 |
struct jpeg_destination_mgr manager;
|
| 1243 |
JSAMPROW row[1];
|
| 1244 |
uint8_t *buf; |
| 1245 |
int dy;
|
| 1246 |
|
| 1247 |
if (ds_get_bytes_per_pixel(vs->ds) == 1) |
| 1248 |
return send_full_color_rect(vs, w, h);
|
| 1249 |
|
| 1250 |
buf = qemu_malloc(w * 3);
|
| 1251 |
row[0] = buf;
|
| 1252 |
buffer_reserve(&vs->tight_jpeg, 2048);
|
| 1253 |
|
| 1254 |
cinfo.err = jpeg_std_error(&jerr); |
| 1255 |
jpeg_create_compress(&cinfo); |
| 1256 |
|
| 1257 |
cinfo.client_data = vs; |
| 1258 |
cinfo.image_width = w; |
| 1259 |
cinfo.image_height = h; |
| 1260 |
cinfo.input_components = 3;
|
| 1261 |
cinfo.in_color_space = JCS_RGB; |
| 1262 |
|
| 1263 |
jpeg_set_defaults(&cinfo); |
| 1264 |
jpeg_set_quality(&cinfo, quality, true);
|
| 1265 |
|
| 1266 |
manager.init_destination = jpeg_init_destination; |
| 1267 |
manager.empty_output_buffer = jpeg_empty_output_buffer; |
| 1268 |
manager.term_destination = jpeg_term_destination; |
| 1269 |
cinfo.dest = &manager; |
| 1270 |
|
| 1271 |
jpeg_start_compress(&cinfo, true);
|
| 1272 |
|
| 1273 |
for (dy = 0; dy < h; dy++) { |
| 1274 |
jpeg_prepare_row(vs, buf, x, y + dy, w); |
| 1275 |
jpeg_write_scanlines(&cinfo, row, 1);
|
| 1276 |
} |
| 1277 |
|
| 1278 |
jpeg_finish_compress(&cinfo); |
| 1279 |
jpeg_destroy_compress(&cinfo); |
| 1280 |
|
| 1281 |
vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
|
| 1282 |
|
| 1283 |
tight_send_compact_size(vs, vs->tight_jpeg.offset); |
| 1284 |
vnc_write(vs, vs->tight_jpeg.buffer, vs->tight_jpeg.offset); |
| 1285 |
buffer_reset(&vs->tight_jpeg); |
| 1286 |
|
| 1287 |
return 1; |
| 1288 |
} |
| 1289 |
#endif /* CONFIG_VNC_JPEG */ |
| 1290 |
|
| 1291 |
static void vnc_tight_start(VncState *vs) |
| 1292 |
{
|
| 1293 |
buffer_reset(&vs->tight); |
| 1294 |
|
| 1295 |
// make the output buffer be the zlib buffer, so we can compress it later
|
| 1296 |
vs->tight_tmp = vs->output; |
| 1297 |
vs->output = vs->tight; |
| 1298 |
} |
| 1299 |
|
| 1300 |
static void vnc_tight_stop(VncState *vs) |
| 1301 |
{
|
| 1302 |
// switch back to normal output/zlib buffers
|
| 1303 |
vs->tight = vs->output; |
| 1304 |
vs->output = vs->tight_tmp; |
| 1305 |
} |
| 1306 |
|
| 1307 |
static int send_sub_rect(VncState *vs, int x, int y, int w, int h) |
| 1308 |
{
|
| 1309 |
struct QDict *palette = NULL; |
| 1310 |
uint32_t bg = 0, fg = 0; |
| 1311 |
int colors;
|
| 1312 |
int ret = 0; |
| 1313 |
|
| 1314 |
vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT); |
| 1315 |
|
| 1316 |
vnc_tight_start(vs); |
| 1317 |
vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| 1318 |
vnc_tight_stop(vs); |
| 1319 |
|
| 1320 |
colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette); |
| 1321 |
|
| 1322 |
if (colors == 0) { |
| 1323 |
if (tight_detect_smooth_image(vs, w, h)) {
|
| 1324 |
if (vs->tight_quality == -1) { |
| 1325 |
ret = send_gradient_rect(vs, w, h); |
| 1326 |
} else {
|
| 1327 |
#ifdef CONFIG_VNC_JPEG
|
| 1328 |
int quality = tight_conf[vs->tight_quality].jpeg_quality;
|
| 1329 |
|
| 1330 |
ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| 1331 |
#else
|
| 1332 |
ret = send_full_color_rect(vs, w, h); |
| 1333 |
#endif
|
| 1334 |
} |
| 1335 |
} else {
|
| 1336 |
ret = send_full_color_rect(vs, w, h); |
| 1337 |
} |
| 1338 |
} else if (colors == 1) { |
| 1339 |
ret = send_solid_rect(vs); |
| 1340 |
} else if (colors == 2) { |
| 1341 |
ret = send_mono_rect(vs, w, h, bg, fg); |
| 1342 |
} else if (colors <= 256) { |
| 1343 |
#ifdef CONFIG_VNC_JPEG
|
| 1344 |
if (colors > 96 && vs->tight_quality != -1 && vs->tight_quality <= 3 && |
| 1345 |
tight_detect_smooth_image(vs, w, h)) {
|
| 1346 |
int quality = tight_conf[vs->tight_quality].jpeg_quality;
|
| 1347 |
|
| 1348 |
ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| 1349 |
} else {
|
| 1350 |
ret = send_palette_rect(vs, w, h, palette); |
| 1351 |
} |
| 1352 |
#else
|
| 1353 |
ret = send_palette_rect(vs, w, h, palette); |
| 1354 |
#endif
|
| 1355 |
} |
| 1356 |
QDECREF(palette); |
| 1357 |
return ret;
|
| 1358 |
} |
| 1359 |
|
| 1360 |
static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h) |
| 1361 |
{
|
| 1362 |
vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT); |
| 1363 |
|
| 1364 |
vnc_tight_start(vs); |
| 1365 |
vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| 1366 |
vnc_tight_stop(vs); |
| 1367 |
|
| 1368 |
return send_solid_rect(vs);
|
| 1369 |
} |
| 1370 |
|
| 1371 |
static int send_rect_simple(VncState *vs, int x, int y, int w, int h) |
| 1372 |
{
|
| 1373 |
int max_size, max_width;
|
| 1374 |
int max_sub_width, max_sub_height;
|
| 1375 |
int dx, dy;
|
| 1376 |
int rw, rh;
|
| 1377 |
int n = 0; |
| 1378 |
|
| 1379 |
max_size = tight_conf[vs->tight_compression].max_rect_size; |
| 1380 |
max_width = tight_conf[vs->tight_compression].max_rect_width; |
| 1381 |
|
| 1382 |
if (w > max_width || w * h > max_size) {
|
| 1383 |
max_sub_width = (w > max_width) ? max_width : w; |
| 1384 |
max_sub_height = max_size / max_sub_width; |
| 1385 |
|
| 1386 |
for (dy = 0; dy < h; dy += max_sub_height) { |
| 1387 |
for (dx = 0; dx < w; dx += max_width) { |
| 1388 |
rw = MIN(max_sub_width, w - dx); |
| 1389 |
rh = MIN(max_sub_height, h - dy); |
| 1390 |
n += send_sub_rect(vs, x+dx, y+dy, rw, rh); |
| 1391 |
} |
| 1392 |
} |
| 1393 |
} else {
|
| 1394 |
n += send_sub_rect(vs, x, y, w, h); |
| 1395 |
} |
| 1396 |
|
| 1397 |
return n;
|
| 1398 |
} |
| 1399 |
|
| 1400 |
static int find_large_solid_color_rect(VncState *vs, int x, int y, |
| 1401 |
int w, int h, int max_rows) |
| 1402 |
{
|
| 1403 |
int dx, dy, dw, dh;
|
| 1404 |
int n = 0; |
| 1405 |
|
| 1406 |
/* Try to find large solid-color areas and send them separately. */
|
| 1407 |
|
| 1408 |
for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
| 1409 |
|
| 1410 |
/* If a rectangle becomes too large, send its upper part now. */
|
| 1411 |
|
| 1412 |
if (dy - y >= max_rows) {
|
| 1413 |
n += send_rect_simple(vs, x, y, w, max_rows); |
| 1414 |
y += max_rows; |
| 1415 |
h -= max_rows; |
| 1416 |
} |
| 1417 |
|
| 1418 |
dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy)); |
| 1419 |
|
| 1420 |
for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
|
| 1421 |
uint32_t color_value; |
| 1422 |
int x_best, y_best, w_best, h_best;
|
| 1423 |
|
| 1424 |
dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx)); |
| 1425 |
|
| 1426 |
if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) { |
| 1427 |
continue ;
|
| 1428 |
} |
| 1429 |
|
| 1430 |
/* Get dimensions of solid-color area. */
|
| 1431 |
|
| 1432 |
find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y), |
| 1433 |
color_value, &w_best, &h_best); |
| 1434 |
|
| 1435 |
/* Make sure a solid rectangle is large enough
|
| 1436 |
(or the whole rectangle is of the same color). */
|
| 1437 |
|
| 1438 |
if (w_best * h_best != w * h &&
|
| 1439 |
w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
|
| 1440 |
continue;
|
| 1441 |
} |
| 1442 |
|
| 1443 |
/* Try to extend solid rectangle to maximum size. */
|
| 1444 |
|
| 1445 |
x_best = dx; y_best = dy; |
| 1446 |
extend_solid_area(vs, x, y, w, h, color_value, |
| 1447 |
&x_best, &y_best, &w_best, &h_best); |
| 1448 |
|
| 1449 |
/* Send rectangles at top and left to solid-color area. */
|
| 1450 |
|
| 1451 |
if (y_best != y) {
|
| 1452 |
n += send_rect_simple(vs, x, y, w, y_best-y); |
| 1453 |
} |
| 1454 |
if (x_best != x) {
|
| 1455 |
n += vnc_tight_send_framebuffer_update(vs, x, y_best, |
| 1456 |
x_best-x, h_best); |
| 1457 |
} |
| 1458 |
|
| 1459 |
/* Send solid-color rectangle. */
|
| 1460 |
n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best); |
| 1461 |
|
| 1462 |
/* Send remaining rectangles (at right and bottom). */
|
| 1463 |
|
| 1464 |
if (x_best + w_best != x + w) {
|
| 1465 |
n += vnc_tight_send_framebuffer_update(vs, x_best+w_best, |
| 1466 |
y_best, |
| 1467 |
w-(x_best-x)-w_best, |
| 1468 |
h_best); |
| 1469 |
} |
| 1470 |
if (y_best + h_best != y + h) {
|
| 1471 |
n += vnc_tight_send_framebuffer_update(vs, x, y_best+h_best, |
| 1472 |
w, h-(y_best-y)-h_best); |
| 1473 |
} |
| 1474 |
|
| 1475 |
/* Return after all recursive calls are done. */
|
| 1476 |
return n;
|
| 1477 |
} |
| 1478 |
} |
| 1479 |
return n + send_rect_simple(vs, x, y, w, h);
|
| 1480 |
} |
| 1481 |
|
| 1482 |
int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, |
| 1483 |
int w, int h) |
| 1484 |
{
|
| 1485 |
int max_rows;
|
| 1486 |
|
| 1487 |
if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF && |
| 1488 |
vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) { |
| 1489 |
vs->tight_pixel24 = true;
|
| 1490 |
} else {
|
| 1491 |
vs->tight_pixel24 = false;
|
| 1492 |
} |
| 1493 |
|
| 1494 |
if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE)
|
| 1495 |
return send_rect_simple(vs, x, y, w, h);
|
| 1496 |
|
| 1497 |
/* Calculate maximum number of rows in one non-solid rectangle. */
|
| 1498 |
|
| 1499 |
max_rows = tight_conf[vs->tight_compression].max_rect_size; |
| 1500 |
max_rows /= MIN(tight_conf[vs->tight_compression].max_rect_width, w); |
| 1501 |
|
| 1502 |
return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
|
| 1503 |
} |
| 1504 |
|
| 1505 |
void vnc_tight_clear(VncState *vs)
|
| 1506 |
{
|
| 1507 |
int i;
|
| 1508 |
for (i=0; i<ARRAY_SIZE(vs->tight_stream); i++) { |
| 1509 |
if (vs->tight_stream[i].opaque) {
|
| 1510 |
deflateEnd(&vs->tight_stream[i]); |
| 1511 |
} |
| 1512 |
} |
| 1513 |
|
| 1514 |
buffer_free(&vs->tight); |
| 1515 |
buffer_free(&vs->tight_zlib); |
| 1516 |
buffer_free(&vs->tight_gradient); |
| 1517 |
#ifdef CONFIG_VNC_JPEG
|
| 1518 |
buffer_free(&vs->tight_jpeg); |
| 1519 |
#endif
|
| 1520 |
} |