| /* |
| * QEMU VNC display driver: tight encoding |
| * |
| * From libvncserver/libvncserver/tight.c |
| * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved. |
| * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. |
| * |
| * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| |
| /* This needs to be before jpeglib.h line because of conflict with |
| INT32 definitions between jmorecfg.h (included by jpeglib.h) and |
| Win32 basetsd.h (included by windows.h). */ |
| |
| #ifdef CONFIG_PNG |
| /* The following define is needed by pngconf.h. Otherwise it won't compile, |
| because setjmp.h was already included by osdep.h. */ |
| #define PNG_SKIP_SETJMP_CHECK |
| #include <png.h> |
| #endif |
| #ifdef CONFIG_VNC_JPEG |
| #include <jpeglib.h> |
| #endif |
| |
| #include "qemu/bswap.h" |
| #include "vnc.h" |
| #include "vnc-enc-tight.h" |
| #include "vnc-palette.h" |
| |
| /* Compression level stuff. The following array contains various |
| encoder parameters for each of 10 compression levels (0..9). |
| Last three parameters correspond to JPEG quality levels (0..9). */ |
| |
| static const struct { |
| int max_rect_size, max_rect_width; |
| int mono_min_rect_size, gradient_min_rect_size; |
| int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level; |
| int gradient_threshold, gradient_threshold24; |
| int idx_max_colors_divisor; |
| int jpeg_quality, jpeg_threshold, jpeg_threshold24; |
| } tight_conf[] = { |
| { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 }, |
| { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 }, |
| { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 }, |
| { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 }, |
| { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 }, |
| { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 }, |
| { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 }, |
| { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 }, |
| { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 }, |
| { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 } |
| }; |
| |
| |
| static int tight_send_framebuffer_update(VncState *vs, int x, int y, |
| int w, int h); |
| |
| #ifdef CONFIG_VNC_JPEG |
| static const struct { |
| double jpeg_freq_min; /* Don't send JPEG if the freq is bellow */ |
| double jpeg_freq_threshold; /* Always send JPEG if the freq is above */ |
| int jpeg_idx; /* Allow indexed JPEG */ |
| int jpeg_full; /* Allow full color JPEG */ |
| } tight_jpeg_conf[] = { |
| { 0, 8, 1, 1 }, |
| { 0, 8, 1, 1 }, |
| { 0, 8, 1, 1 }, |
| { 0, 8, 1, 1 }, |
| { 0, 10, 1, 1 }, |
| { 0.1, 10, 1, 1 }, |
| { 0.2, 10, 1, 1 }, |
| { 0.3, 12, 0, 0 }, |
| { 0.4, 14, 0, 0 }, |
| { 0.5, 16, 0, 0 }, |
| }; |
| #endif |
| |
| #ifdef CONFIG_PNG |
| static const struct { |
| int png_zlib_level, png_filters; |
| } tight_png_conf[] = { |
| { 0, PNG_NO_FILTERS }, |
| { 1, PNG_NO_FILTERS }, |
| { 2, PNG_NO_FILTERS }, |
| { 3, PNG_NO_FILTERS }, |
| { 4, PNG_NO_FILTERS }, |
| { 5, PNG_ALL_FILTERS }, |
| { 6, PNG_ALL_FILTERS }, |
| { 7, PNG_ALL_FILTERS }, |
| { 8, PNG_ALL_FILTERS }, |
| { 9, PNG_ALL_FILTERS }, |
| }; |
| |
| static int send_png_rect(VncState *vs, int x, int y, int w, int h, |
| VncPalette *palette); |
| |
| static bool tight_can_send_png_rect(VncState *vs, int w, int h) |
| { |
| if (vs->tight->type != VNC_ENCODING_TIGHT_PNG) { |
| return false; |
| } |
| |
| if (surface_bytes_per_pixel(vs->vd->ds) == 1 || |
| vs->client_pf.bytes_per_pixel == 1) { |
| return false; |
| } |
| |
| return true; |
| } |
| #endif |
| |
| /* |
| * Code to guess if given rectangle is suitable for smooth image |
| * compression (by applying "gradient" filter or JPEG coder). |
| */ |
| |
| static unsigned int |
| tight_detect_smooth_image24(VncState *vs, int w, int h) |
| { |
| int off; |
| int x, y, d, dx; |
| unsigned int c; |
| unsigned int stats[256]; |
| int pixels = 0; |
| int pix, left[3]; |
| unsigned int errors; |
| unsigned char *buf = vs->tight->tight.buffer; |
| |
| /* |
| * If client is big-endian, color samples begin from the second |
| * byte (offset 1) of a 32-bit pixel value. |
| */ |
| off = vs->client_be; |
| |
| memset(stats, 0, sizeof (stats)); |
| |
| for (y = 0, x = 0; y < h && x < w;) { |
| for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; |
| d++) { |
| for (c = 0; c < 3; c++) { |
| left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF; |
| } |
| for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) { |
| for (c = 0; c < 3; c++) { |
| pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF; |
| stats[abs(pix - left[c])]++; |
| left[c] = pix; |
| } |
| pixels++; |
| } |
| } |
| if (w > h) { |
| x += h; |
| y = 0; |
| } else { |
| x = 0; |
| y += w; |
| } |
| } |
| |
| if (pixels == 0) { |
| return 0; |
| } |
| |
| /* 95% smooth or more ... */ |
| if (stats[0] * 33 / pixels >= 95) { |
| return 0; |
| } |
| |
| errors = 0; |
| for (c = 1; c < 8; c++) { |
| errors += stats[c] * (c * c); |
| if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { |
| return 0; |
| } |
| } |
| for (; c < 256; c++) { |
| errors += stats[c] * (c * c); |
| } |
| errors /= (pixels * 3 - stats[0]); |
| |
| return errors; |
| } |
| |
| #define DEFINE_DETECT_FUNCTION(bpp) \ |
| \ |
| static unsigned int \ |
| tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \ |
| bool endian; \ |
| uint##bpp##_t pix; \ |
| int max[3], shift[3]; \ |
| int x, y, d, dx; \ |
| unsigned int c; \ |
| unsigned int stats[256]; \ |
| int pixels = 0; \ |
| int sample, sum, left[3]; \ |
| unsigned int errors; \ |
| unsigned char *buf = vs->tight->tight.buffer; \ |
| \ |
| endian = 0; /* FIXME */ \ |
| \ |
| \ |
| max[0] = vs->client_pf.rmax; \ |
| max[1] = vs->client_pf.gmax; \ |
| max[2] = vs->client_pf.bmax; \ |
| shift[0] = vs->client_pf.rshift; \ |
| shift[1] = vs->client_pf.gshift; \ |
| shift[2] = vs->client_pf.bshift; \ |
| \ |
| memset(stats, 0, sizeof(stats)); \ |
| \ |
| y = 0, x = 0; \ |
| while (y < h && x < w) { \ |
| for (d = 0; d < h - y && \ |
| d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \ |
| pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \ |
| if (endian) { \ |
| pix = bswap##bpp(pix); \ |
| } \ |
| for (c = 0; c < 3; c++) { \ |
| left[c] = (int)(pix >> shift[c] & max[c]); \ |
| } \ |
| for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \ |
| dx++) { \ |
| pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \ |
| if (endian) { \ |
| pix = bswap##bpp(pix); \ |
| } \ |
| sum = 0; \ |
| for (c = 0; c < 3; c++) { \ |
| sample = (int)(pix >> shift[c] & max[c]); \ |
| sum += abs(sample - left[c]); \ |
| left[c] = sample; \ |
| } \ |
| if (sum > 255) { \ |
| sum = 255; \ |
| } \ |
| stats[sum]++; \ |
| pixels++; \ |
| } \ |
| } \ |
| if (w > h) { \ |
| x += h; \ |
| y = 0; \ |
| } else { \ |
| x = 0; \ |
| y += w; \ |
| } \ |
| } \ |
| if (pixels == 0) { \ |
| return 0; \ |
| } \ |
| if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \ |
| return 0; \ |
| } \ |
| \ |
| errors = 0; \ |
| for (c = 1; c < 8; c++) { \ |
| errors += stats[c] * (c * c); \ |
| if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \ |
| return 0; \ |
| } \ |
| } \ |
| for (; c < 256; c++) { \ |
| errors += stats[c] * (c * c); \ |
| } \ |
| errors /= (pixels - stats[0]); \ |
| \ |
| return errors; \ |
| } |
| |
| DEFINE_DETECT_FUNCTION(16) |
| DEFINE_DETECT_FUNCTION(32) |
| |
| static int |
| tight_detect_smooth_image(VncState *vs, int w, int h) |
| { |
| unsigned int errors; |
| int compression = vs->tight->compression; |
| int quality = vs->tight->quality; |
| |
| if (!vs->vd->lossy) { |
| return 0; |
| } |
| |
| if (surface_bytes_per_pixel(vs->vd->ds) == 1 || |
| vs->client_pf.bytes_per_pixel == 1 || |
| w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) { |
| return 0; |
| } |
| |
| if (vs->tight->quality != (uint8_t)-1) { |
| if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) { |
| return 0; |
| } |
| } else { |
| if (w * h < tight_conf[compression].gradient_min_rect_size) { |
| return 0; |
| } |
| } |
| |
| if (vs->client_pf.bytes_per_pixel == 4) { |
| if (vs->tight->pixel24) { |
| errors = tight_detect_smooth_image24(vs, w, h); |
| if (vs->tight->quality != (uint8_t)-1) { |
| return (errors < tight_conf[quality].jpeg_threshold24); |
| } |
| return (errors < tight_conf[compression].gradient_threshold24); |
| } else { |
| errors = tight_detect_smooth_image32(vs, w, h); |
| } |
| } else { |
| errors = tight_detect_smooth_image16(vs, w, h); |
| } |
| if (quality != (uint8_t)-1) { |
| return (errors < tight_conf[quality].jpeg_threshold); |
| } |
| return (errors < tight_conf[compression].gradient_threshold); |
| } |
| |
| /* |
| * Code to determine how many different colors used in rectangle. |
| */ |
| #define DEFINE_FILL_PALETTE_FUNCTION(bpp) \ |
| \ |
| static int \ |
| tight_fill_palette##bpp(VncState *vs, int x, int y, \ |
| int max, size_t count, \ |
| uint32_t *bg, uint32_t *fg, \ |
| VncPalette *palette) { \ |
| uint##bpp##_t *data; \ |
| uint##bpp##_t c0, c1, ci; \ |
| int i, n0, n1; \ |
| \ |
| data = (uint##bpp##_t *)vs->tight->tight.buffer; \ |
| \ |
| c0 = data[0]; \ |
| i = 1; \ |
| while (i < count && data[i] == c0) \ |
| i++; \ |
| if (i >= count) { \ |
| *bg = *fg = c0; \ |
| return 1; \ |
| } \ |
| \ |
| if (max < 2) { \ |
| return 0; \ |
| } \ |
| \ |
| n0 = i; \ |
| c1 = data[i]; \ |
| n1 = 0; \ |
| for (i++; i < count; i++) { \ |
| ci = data[i]; \ |
| if (ci == c0) { \ |
| n0++; \ |
| } else if (ci == c1) { \ |
| n1++; \ |
| } else \ |
| break; \ |
| } \ |
| if (i >= count) { \ |
| if (n0 > n1) { \ |
| *bg = (uint32_t)c0; \ |
| *fg = (uint32_t)c1; \ |
| } else { \ |
| *bg = (uint32_t)c1; \ |
| *fg = (uint32_t)c0; \ |
| } \ |
| return 2; \ |
| } \ |
| \ |
| if (max == 2) { \ |
| return 0; \ |
| } \ |
| \ |
| palette_init(palette, max, bpp); \ |
| palette_put(palette, c0); \ |
| palette_put(palette, c1); \ |
| palette_put(palette, ci); \ |
| \ |
| for (i++; i < count; i++) { \ |
| if (data[i] == ci) { \ |
| continue; \ |
| } else { \ |
| ci = data[i]; \ |
| if (!palette_put(palette, (uint32_t)ci)) { \ |
| return 0; \ |
| } \ |
| } \ |
| } \ |
| \ |
| return palette_size(palette); \ |
| } |
| |
| DEFINE_FILL_PALETTE_FUNCTION(8) |
| DEFINE_FILL_PALETTE_FUNCTION(16) |
| DEFINE_FILL_PALETTE_FUNCTION(32) |
| |
| static int tight_fill_palette(VncState *vs, int x, int y, |
| size_t count, uint32_t *bg, uint32_t *fg, |
| VncPalette *palette) |
| { |
| int max; |
| |
| max = count / tight_conf[vs->tight->compression].idx_max_colors_divisor; |
| if (max < 2 && |
| count >= tight_conf[vs->tight->compression].mono_min_rect_size) { |
| max = 2; |
| } |
| if (max >= 256) { |
| max = 256; |
| } |
| |
| switch (vs->client_pf.bytes_per_pixel) { |
| case 4: |
| return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette); |
| case 2: |
| return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette); |
| default: |
| max = 2; |
| return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette); |
| } |
| return 0; |
| } |
| |
| /* |
| * Converting truecolor samples into palette indices. |
| */ |
| #define DEFINE_IDX_ENCODE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \ |
| VncPalette *palette) { \ |
| uint##bpp##_t *src; \ |
| uint##bpp##_t rgb; \ |
| int i, rep; \ |
| uint8_t idx; \ |
| \ |
| src = (uint##bpp##_t *) buf; \ |
| \ |
| for (i = 0; i < count; ) { \ |
| \ |
| rgb = *src++; \ |
| i++; \ |
| rep = 0; \ |
| while (i < count && *src == rgb) { \ |
| rep++, src++, i++; \ |
| } \ |
| idx = palette_idx(palette, rgb); \ |
| /* \ |
| * Should never happen, but don't break everything \ |
| * if it does, use the first color instead \ |
| */ \ |
| if (idx == (uint8_t)-1) { \ |
| idx = 0; \ |
| } \ |
| while (rep >= 0) { \ |
| *buf++ = idx; \ |
| rep--; \ |
| } \ |
| } \ |
| } |
| |
| DEFINE_IDX_ENCODE_FUNCTION(16) |
| DEFINE_IDX_ENCODE_FUNCTION(32) |
| |
| #define DEFINE_MONO_ENCODE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \ |
| uint##bpp##_t bg, uint##bpp##_t fg) { \ |
| uint##bpp##_t *ptr; \ |
| unsigned int value, mask; \ |
| int aligned_width; \ |
| int x, y, bg_bits; \ |
| \ |
| ptr = (uint##bpp##_t *) buf; \ |
| aligned_width = w - w % 8; \ |
| \ |
| for (y = 0; y < h; y++) { \ |
| for (x = 0; x < aligned_width; x += 8) { \ |
| for (bg_bits = 0; bg_bits < 8; bg_bits++) { \ |
| if (*ptr++ != bg) { \ |
| break; \ |
| } \ |
| } \ |
| if (bg_bits == 8) { \ |
| *buf++ = 0; \ |
| continue; \ |
| } \ |
| mask = 0x80 >> bg_bits; \ |
| value = mask; \ |
| for (bg_bits++; bg_bits < 8; bg_bits++) { \ |
| mask >>= 1; \ |
| if (*ptr++ != bg) { \ |
| value |= mask; \ |
| } \ |
| } \ |
| *buf++ = (uint8_t)value; \ |
| } \ |
| \ |
| mask = 0x80; \ |
| value = 0; \ |
| if (x >= w) { \ |
| continue; \ |
| } \ |
| \ |
| for (; x < w; x++) { \ |
| if (*ptr++ != bg) { \ |
| value |= mask; \ |
| } \ |
| mask >>= 1; \ |
| } \ |
| *buf++ = (uint8_t)value; \ |
| } \ |
| } |
| |
| DEFINE_MONO_ENCODE_FUNCTION(8) |
| DEFINE_MONO_ENCODE_FUNCTION(16) |
| DEFINE_MONO_ENCODE_FUNCTION(32) |
| |
| /* |
| * ``Gradient'' filter for 24-bit color samples. |
| * Should be called only when redMax, greenMax and blueMax are 255. |
| * Color components assumed to be byte-aligned. |
| */ |
| |
| static void |
| tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h) |
| { |
| uint32_t *buf32; |
| uint32_t pix32; |
| int shift[3]; |
| int *prev; |
| int here[3], upper[3], left[3], upperleft[3]; |
| int prediction; |
| int x, y, c; |
| |
| buf32 = (uint32_t *)buf; |
| memset(vs->tight->gradient.buffer, 0, w * 3 * sizeof(int)); |
| |
| if (1 /* FIXME */) { |
| shift[0] = vs->client_pf.rshift; |
| shift[1] = vs->client_pf.gshift; |
| shift[2] = vs->client_pf.bshift; |
| } else { |
| shift[0] = 24 - vs->client_pf.rshift; |
| shift[1] = 24 - vs->client_pf.gshift; |
| shift[2] = 24 - vs->client_pf.bshift; |
| } |
| |
| for (y = 0; y < h; y++) { |
| for (c = 0; c < 3; c++) { |
| upper[c] = 0; |
| here[c] = 0; |
| } |
| prev = (int *)vs->tight->gradient.buffer; |
| for (x = 0; x < w; x++) { |
| pix32 = *buf32++; |
| for (c = 0; c < 3; c++) { |
| upperleft[c] = upper[c]; |
| left[c] = here[c]; |
| upper[c] = *prev; |
| here[c] = (int)(pix32 >> shift[c] & 0xFF); |
| *prev++ = here[c]; |
| |
| prediction = left[c] + upper[c] - upperleft[c]; |
| if (prediction < 0) { |
| prediction = 0; |
| } else if (prediction > 0xFF) { |
| prediction = 0xFF; |
| } |
| *buf++ = (char)(here[c] - prediction); |
| } |
| } |
| } |
| } |
| |
| |
| /* |
| * ``Gradient'' filter for other color depths. |
| */ |
| |
| #define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \ |
| \ |
| static void \ |
| tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \ |
| int w, int h) { \ |
| uint##bpp##_t pix, diff; \ |
| bool endian; \ |
| int *prev; \ |
| int max[3], shift[3]; \ |
| int here[3], upper[3], left[3], upperleft[3]; \ |
| int prediction; \ |
| int x, y, c; \ |
| \ |
| memset(vs->tight->gradient.buffer, 0, w * 3 * sizeof(int)); \ |
| \ |
| endian = 0; /* FIXME */ \ |
| \ |
| max[0] = vs->client_pf.rmax; \ |
| max[1] = vs->client_pf.gmax; \ |
| max[2] = vs->client_pf.bmax; \ |
| shift[0] = vs->client_pf.rshift; \ |
| shift[1] = vs->client_pf.gshift; \ |
| shift[2] = vs->client_pf.bshift; \ |
| \ |
| for (y = 0; y < h; y++) { \ |
| for (c = 0; c < 3; c++) { \ |
| upper[c] = 0; \ |
| here[c] = 0; \ |
| } \ |
| prev = (int *)vs->tight->gradient.buffer; \ |
| for (x = 0; x < w; x++) { \ |
| pix = *buf; \ |
| if (endian) { \ |
| pix = bswap##bpp(pix); \ |
| } \ |
| diff = 0; \ |
| for (c = 0; c < 3; c++) { \ |
| upperleft[c] = upper[c]; \ |
| left[c] = here[c]; \ |
| upper[c] = *prev; \ |
| here[c] = (int)(pix >> shift[c] & max[c]); \ |
| *prev++ = here[c]; \ |
| \ |
| prediction = left[c] + upper[c] - upperleft[c]; \ |
| if (prediction < 0) { \ |
| prediction = 0; \ |
| } else if (prediction > max[c]) { \ |
| prediction = max[c]; \ |
| } \ |
| diff |= ((here[c] - prediction) & max[c]) \ |
| << shift[c]; \ |
| } \ |
| if (endian) { \ |
| diff = bswap##bpp(diff); \ |
| } \ |
| *buf++ = diff; \ |
| } \ |
| } \ |
| } |
| |
| DEFINE_GRADIENT_FILTER_FUNCTION(16) |
| DEFINE_GRADIENT_FILTER_FUNCTION(32) |
| |
| /* |
| * Check if a rectangle is all of the same color. If needSameColor is |
| * set to non-zero, then also check that its color equals to the |
| * *colorPtr value. The result is 1 if the test is successful, and in |
| * that case new color will be stored in *colorPtr. |
| */ |
| |
| static bool |
| check_solid_tile32(VncState *vs, int x, int y, int w, int h, |
| uint32_t *color, bool samecolor) |
| { |
| VncDisplay *vd = vs->vd; |
| uint32_t *fbptr; |
| uint32_t c; |
| int dx, dy; |
| |
| fbptr = vnc_server_fb_ptr(vd, x, y); |
| |
| c = *fbptr; |
| if (samecolor && (uint32_t)c != *color) { |
| return false; |
| } |
| |
| for (dy = 0; dy < h; dy++) { |
| for (dx = 0; dx < w; dx++) { |
| if (c != fbptr[dx]) { |
| return false; |
| } |
| } |
| fbptr = (uint32_t *) |
| ((uint8_t *)fbptr + vnc_server_fb_stride(vd)); |
| } |
| |
| *color = (uint32_t)c; |
| return true; |
| } |
| |
| static bool check_solid_tile(VncState *vs, int x, int y, int w, int h, |
| uint32_t* color, bool samecolor) |
| { |
| QEMU_BUILD_BUG_ON(VNC_SERVER_FB_BYTES != 4); |
| return check_solid_tile32(vs, x, y, w, h, color, samecolor); |
| } |
| |
| static void find_best_solid_area(VncState *vs, int x, int y, int w, int h, |
| uint32_t color, int *w_ptr, int *h_ptr) |
| { |
| int dx, dy, dw, dh; |
| int w_prev; |
| int w_best = 0, h_best = 0; |
| |
| w_prev = w; |
| |
| for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| |
| dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy); |
| dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev); |
| |
| if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) { |
| break; |
| } |
| |
| for (dx = x + dw; dx < x + w_prev;) { |
| dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx); |
| |
| if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) { |
| break; |
| } |
| dx += dw; |
| } |
| |
| w_prev = dx - x; |
| if (w_prev * (dy + dh - y) > w_best * h_best) { |
| w_best = w_prev; |
| h_best = dy + dh - y; |
| } |
| } |
| |
| *w_ptr = w_best; |
| *h_ptr = h_best; |
| } |
| |
| static void extend_solid_area(VncState *vs, int x, int y, int w, int h, |
| uint32_t color, int *x_ptr, int *y_ptr, |
| int *w_ptr, int *h_ptr) |
| { |
| int cx, cy; |
| |
| /* Try to extend the area upwards. */ |
| for ( cy = *y_ptr - 1; |
| cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| cy-- ); |
| *h_ptr += *y_ptr - (cy + 1); |
| *y_ptr = cy + 1; |
| |
| /* ... downwards. */ |
| for ( cy = *y_ptr + *h_ptr; |
| cy < y + h && |
| check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| cy++ ); |
| *h_ptr += cy - (*y_ptr + *h_ptr); |
| |
| /* ... to the left. */ |
| for ( cx = *x_ptr - 1; |
| cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| cx-- ); |
| *w_ptr += *x_ptr - (cx + 1); |
| *x_ptr = cx + 1; |
| |
| /* ... to the right. */ |
| for ( cx = *x_ptr + *w_ptr; |
| cx < x + w && |
| check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| cx++ ); |
| *w_ptr += cx - (*x_ptr + *w_ptr); |
| } |
| |
| static int tight_init_stream(VncState *vs, int stream_id, |
| int level, int strategy) |
| { |
| z_streamp zstream = &vs->tight->stream[stream_id]; |
| |
| if (zstream->opaque == NULL) { |
| int err; |
| |
| VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id); |
| VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs); |
| zstream->zalloc = vnc_zlib_zalloc; |
| zstream->zfree = vnc_zlib_zfree; |
| |
| err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS, |
| MAX_MEM_LEVEL, strategy); |
| |
| if (err != Z_OK) { |
| fprintf(stderr, "VNC: error initializing zlib\n"); |
| return -1; |
| } |
| |
| vs->tight->levels[stream_id] = level; |
| zstream->opaque = vs; |
| } |
| |
| if (vs->tight->levels[stream_id] != level) { |
| if (deflateParams(zstream, level, strategy) != Z_OK) { |
| return -1; |
| } |
| vs->tight->levels[stream_id] = level; |
| } |
| return 0; |
| } |
| |
| static void tight_send_compact_size(VncState *vs, size_t len) |
| { |
| int lpc = 0; |
| int bytes = 0; |
| char buf[3] = {0, 0, 0}; |
| |
| buf[bytes++] = len & 0x7F; |
| if (len > 0x7F) { |
| buf[bytes-1] |= 0x80; |
| buf[bytes++] = (len >> 7) & 0x7F; |
| if (len > 0x3FFF) { |
| buf[bytes-1] |= 0x80; |
| buf[bytes++] = (len >> 14) & 0xFF; |
| } |
| } |
| for (lpc = 0; lpc < bytes; lpc++) { |
| vnc_write_u8(vs, buf[lpc]); |
| } |
| } |
| |
| static int tight_compress_data(VncState *vs, int stream_id, size_t bytes, |
| int level, int strategy) |
| { |
| z_streamp zstream = &vs->tight->stream[stream_id]; |
| int previous_out; |
| |
| if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) { |
| vnc_write(vs, vs->tight->tight.buffer, vs->tight->tight.offset); |
| return bytes; |
| } |
| |
| if (tight_init_stream(vs, stream_id, level, strategy)) { |
| return -1; |
| } |
| |
| /* reserve memory in output buffer */ |
| buffer_reserve(&vs->tight->zlib, bytes + 64); |
| |
| /* set pointers */ |
| zstream->next_in = vs->tight->tight.buffer; |
| zstream->avail_in = vs->tight->tight.offset; |
| zstream->next_out = vs->tight->zlib.buffer + vs->tight->zlib.offset; |
| zstream->avail_out = vs->tight->zlib.capacity - vs->tight->zlib.offset; |
| previous_out = zstream->avail_out; |
| zstream->data_type = Z_BINARY; |
| |
| /* start encoding */ |
| if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) { |
| fprintf(stderr, "VNC: error during tight compression\n"); |
| return -1; |
| } |
| |
| vs->tight->zlib.offset = vs->tight->zlib.capacity - zstream->avail_out; |
| /* ...how much data has actually been produced by deflate() */ |
| bytes = previous_out - zstream->avail_out; |
| |
| tight_send_compact_size(vs, bytes); |
| vnc_write(vs, vs->tight->zlib.buffer, bytes); |
| |
| buffer_reset(&vs->tight->zlib); |
| |
| return bytes; |
| } |
| |
| /* |
| * Subencoding implementations. |
| */ |
| static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret) |
| { |
| uint8_t *buf8; |
| uint32_t pix; |
| int rshift, gshift, bshift; |
| |
| buf8 = buf; |
| |
| if (1 /* FIXME */) { |
| rshift = vs->client_pf.rshift; |
| gshift = vs->client_pf.gshift; |
| bshift = vs->client_pf.bshift; |
| } else { |
| rshift = 24 - vs->client_pf.rshift; |
| gshift = 24 - vs->client_pf.gshift; |
| bshift = 24 - vs->client_pf.bshift; |
| } |
| |
| if (ret) { |
| *ret = count * 3; |
| } |
| |
| while (count--) { |
| pix = ldl_he_p(buf8); |
| *buf++ = (char)(pix >> rshift); |
| *buf++ = (char)(pix >> gshift); |
| *buf++ = (char)(pix >> bshift); |
| buf8 += 4; |
| } |
| } |
| |
| static int send_full_color_rect(VncState *vs, int x, int y, int w, int h) |
| { |
| int stream = 0; |
| ssize_t bytes; |
| |
| #ifdef CONFIG_PNG |
| if (tight_can_send_png_rect(vs, w, h)) { |
| return send_png_rect(vs, x, y, w, h, NULL); |
| } |
| #endif |
| |
| vnc_write_u8(vs, stream << 4); /* no flushing, no filter */ |
| |
| if (vs->tight->pixel24) { |
| tight_pack24(vs, vs->tight->tight.buffer, w * h, |
| &vs->tight->tight.offset); |
| bytes = 3; |
| } else { |
| bytes = vs->client_pf.bytes_per_pixel; |
| } |
| |
| bytes = tight_compress_data(vs, stream, w * h * bytes, |
| tight_conf[vs->tight->compression].raw_zlib_level, |
| Z_DEFAULT_STRATEGY); |
| |
| return (bytes >= 0); |
| } |
| |
| static int send_solid_rect(VncState *vs) |
| { |
| size_t bytes; |
| |
| vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */ |
| |
| if (vs->tight->pixel24) { |
| tight_pack24(vs, vs->tight->tight.buffer, 1, &vs->tight->tight.offset); |
| bytes = 3; |
| } else { |
| bytes = vs->client_pf.bytes_per_pixel; |
| } |
| |
| vnc_write(vs, vs->tight->tight.buffer, bytes); |
| return 1; |
| } |
| |
| static int send_mono_rect(VncState *vs, int x, int y, |
| int w, int h, uint32_t bg, uint32_t fg) |
| { |
| ssize_t bytes; |
| int stream = 1; |
| int level = tight_conf[vs->tight->compression].mono_zlib_level; |
| |
| #ifdef CONFIG_PNG |
| if (tight_can_send_png_rect(vs, w, h)) { |
| int ret; |
| int bpp = vs->client_pf.bytes_per_pixel * 8; |
| VncPalette *palette = palette_new(2, bpp); |
| |
| palette_put(palette, bg); |
| palette_put(palette, fg); |
| ret = send_png_rect(vs, x, y, w, h, palette); |
| palette_destroy(palette); |
| return ret; |
| } |
| #endif |
| |
| bytes = DIV_ROUND_UP(w, 8) * h; |
| |
| vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| vnc_write_u8(vs, 1); |
| |
| switch (vs->client_pf.bytes_per_pixel) { |
| case 4: |
| { |
| uint32_t buf[2] = {bg, fg}; |
| size_t ret = sizeof (buf); |
| |
| if (vs->tight->pixel24) { |
| tight_pack24(vs, (unsigned char*)buf, 2, &ret); |
| } |
| vnc_write(vs, buf, ret); |
| |
| tight_encode_mono_rect32(vs->tight->tight.buffer, w, h, bg, fg); |
| break; |
| } |
| case 2: |
| vnc_write(vs, &bg, 2); |
| vnc_write(vs, &fg, 2); |
| tight_encode_mono_rect16(vs->tight->tight.buffer, w, h, bg, fg); |
| break; |
| default: |
| vnc_write_u8(vs, bg); |
| vnc_write_u8(vs, fg); |
| tight_encode_mono_rect8(vs->tight->tight.buffer, w, h, bg, fg); |
| break; |
| } |
| vs->tight->tight.offset = bytes; |
| |
| bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY); |
| return (bytes >= 0); |
| } |
| |
| struct palette_cb_priv { |
| VncState *vs; |
| uint8_t *header; |
| #ifdef CONFIG_PNG |
| png_colorp png_palette; |
| #endif |
| }; |
| |
| static void write_palette(int idx, uint32_t color, void *opaque) |
| { |
| struct palette_cb_priv *priv = opaque; |
| VncState *vs = priv->vs; |
| uint32_t bytes = vs->client_pf.bytes_per_pixel; |
| |
| if (bytes == 4) { |
| ((uint32_t*)priv->header)[idx] = color; |
| } else { |
| ((uint16_t*)priv->header)[idx] = color; |
| } |
| } |
| |
| static bool send_gradient_rect(VncState *vs, int x, int y, int w, int h) |
| { |
| int stream = 3; |
| int level = tight_conf[vs->tight->compression].gradient_zlib_level; |
| ssize_t bytes; |
| |
| if (vs->client_pf.bytes_per_pixel == 1) { |
| return send_full_color_rect(vs, x, y, w, h); |
| } |
| |
| vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT); |
| |
| buffer_reserve(&vs->tight->gradient, w * 3 * sizeof(int)); |
| |
| if (vs->tight->pixel24) { |
| tight_filter_gradient24(vs, vs->tight->tight.buffer, w, h); |
| bytes = 3; |
| } else if (vs->client_pf.bytes_per_pixel == 4) { |
| tight_filter_gradient32(vs, (uint32_t *)vs->tight->tight.buffer, w, h); |
| bytes = 4; |
| } else { |
| tight_filter_gradient16(vs, (uint16_t *)vs->tight->tight.buffer, w, h); |
| bytes = 2; |
| } |
| |
| buffer_reset(&vs->tight->gradient); |
| |
| bytes = w * h * bytes; |
| vs->tight->tight.offset = bytes; |
| |
| bytes = tight_compress_data(vs, stream, bytes, |
| level, Z_FILTERED); |
| return (bytes >= 0); |
| } |
| |
| static int send_palette_rect(VncState *vs, int x, int y, |
| int w, int h, VncPalette *palette) |
| { |
| int stream = 2; |
| int level = tight_conf[vs->tight->compression].idx_zlib_level; |
| int colors; |
| ssize_t bytes; |
| |
| #ifdef CONFIG_PNG |
| if (tight_can_send_png_rect(vs, w, h)) { |
| return send_png_rect(vs, x, y, w, h, palette); |
| } |
| #endif |
| |
| colors = palette_size(palette); |
| |
| vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| vnc_write_u8(vs, colors - 1); |
| |
| switch (vs->client_pf.bytes_per_pixel) { |
| case 4: |
| { |
| size_t old_offset, offset; |
| uint32_t header[palette_size(palette)]; |
| struct palette_cb_priv priv = { vs, (uint8_t *)header }; |
| |
| old_offset = vs->output.offset; |
| palette_iter(palette, write_palette, &priv); |
| vnc_write(vs, header, sizeof(header)); |
| |
| if (vs->tight->pixel24) { |
| tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset); |
| vs->output.offset = old_offset + offset; |
| } |
| |
| tight_encode_indexed_rect32(vs->tight->tight.buffer, w * h, palette); |
| break; |
| } |
| case 2: |
| { |
| uint16_t header[palette_size(palette)]; |
| struct palette_cb_priv priv = { vs, (uint8_t *)header }; |
| |
| palette_iter(palette, write_palette, &priv); |
| vnc_write(vs, header, sizeof(header)); |
| tight_encode_indexed_rect16(vs->tight->tight.buffer, w * h, palette); |
| break; |
| } |
| default: |
| return -1; /* No palette for 8bits colors */ |
| } |
| bytes = w * h; |
| vs->tight->tight.offset = bytes; |
| |
| bytes = tight_compress_data(vs, stream, bytes, |
| level, Z_DEFAULT_STRATEGY); |
| return (bytes >= 0); |
| } |
| |
| /* |
| * JPEG compression stuff. |
| */ |
| #ifdef CONFIG_VNC_JPEG |
| /* |
| * Destination manager implementation for JPEG library. |
| */ |
| |
| /* This is called once per encoding */ |
| static void jpeg_init_destination(j_compress_ptr cinfo) |
| { |
| VncState *vs = cinfo->client_data; |
| Buffer *buffer = &vs->tight->jpeg; |
| |
| cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset; |
| cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset); |
| } |
| |
| /* This is called when we ran out of buffer (shouldn't happen!) */ |
| static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo) |
| { |
| VncState *vs = cinfo->client_data; |
| Buffer *buffer = &vs->tight->jpeg; |
| |
| buffer->offset = buffer->capacity; |
| buffer_reserve(buffer, 2048); |
| jpeg_init_destination(cinfo); |
| return TRUE; |
| } |
| |
| /* This is called when we are done processing data */ |
| static void jpeg_term_destination(j_compress_ptr cinfo) |
| { |
| VncState *vs = cinfo->client_data; |
| Buffer *buffer = &vs->tight->jpeg; |
| |
| buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer; |
| } |
| |
| static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality) |
| { |
| struct jpeg_compress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| struct jpeg_destination_mgr manager; |
| pixman_image_t *linebuf; |
| JSAMPROW row[1]; |
| uint8_t *buf; |
| int dy; |
| |
| if (surface_bytes_per_pixel(vs->vd->ds) == 1) { |
| return send_full_color_rect(vs, x, y, w, h); |
| } |
| |
| buffer_reserve(&vs->tight->jpeg, 2048); |
| |
| cinfo.err = jpeg_std_error(&jerr); |
| jpeg_create_compress(&cinfo); |
| |
| cinfo.client_data = vs; |
| cinfo.image_width = w; |
| cinfo.image_height = h; |
| cinfo.input_components = 3; |
| cinfo.in_color_space = JCS_RGB; |
| |
| jpeg_set_defaults(&cinfo); |
| jpeg_set_quality(&cinfo, quality, true); |
| |
| manager.init_destination = jpeg_init_destination; |
| manager.empty_output_buffer = jpeg_empty_output_buffer; |
| manager.term_destination = jpeg_term_destination; |
| cinfo.dest = &manager; |
| |
| jpeg_start_compress(&cinfo, true); |
| |
| linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w); |
| buf = (uint8_t *)pixman_image_get_data(linebuf); |
| row[0] = buf; |
| for (dy = 0; dy < h; dy++) { |
| qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy); |
| jpeg_write_scanlines(&cinfo, row, 1); |
| } |
| qemu_pixman_image_unref(linebuf); |
| |
| jpeg_finish_compress(&cinfo); |
| jpeg_destroy_compress(&cinfo); |
| |
| vnc_write_u8(vs, VNC_TIGHT_JPEG << 4); |
| |
| tight_send_compact_size(vs, vs->tight->jpeg.offset); |
| vnc_write(vs, vs->tight->jpeg.buffer, vs->tight->jpeg.offset); |
| buffer_reset(&vs->tight->jpeg); |
| |
| return 1; |
| } |
| #endif /* CONFIG_VNC_JPEG */ |
| |
| /* |
| * PNG compression stuff. |
| */ |
| #ifdef CONFIG_PNG |
| static void write_png_palette(int idx, uint32_t pix, void *opaque) |
| { |
| struct palette_cb_priv *priv = opaque; |
| VncState *vs = priv->vs; |
| png_colorp color = &priv->png_palette[idx]; |
| |
| if (vs->tight->pixel24) |
| { |
| color->red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax; |
| color->green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax; |
| color->blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax; |
| } |
| else |
| { |
| int red, green, blue; |
| |
| red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax; |
| green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax; |
| blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax; |
| color->red = ((red * 255 + vs->client_pf.rmax / 2) / |
| vs->client_pf.rmax); |
| color->green = ((green * 255 + vs->client_pf.gmax / 2) / |
| vs->client_pf.gmax); |
| color->blue = ((blue * 255 + vs->client_pf.bmax / 2) / |
| vs->client_pf.bmax); |
| } |
| } |
| |
| static void png_write_data(png_structp png_ptr, png_bytep data, |
| png_size_t length) |
| { |
| VncState *vs = png_get_io_ptr(png_ptr); |
| |
| buffer_reserve(&vs->tight->png, vs->tight->png.offset + length); |
| memcpy(vs->tight->png.buffer + vs->tight->png.offset, data, length); |
| |
| vs->tight->png.offset += length; |
| } |
| |
| static void png_flush_data(png_structp png_ptr) |
| { |
| } |
| |
| static void *vnc_png_malloc(png_structp png_ptr, png_size_t size) |
| { |
| return g_malloc(size); |
| } |
| |
| static void vnc_png_free(png_structp png_ptr, png_voidp ptr) |
| { |
| g_free(ptr); |
| } |
| |
| static int send_png_rect(VncState *vs, int x, int y, int w, int h, |
| VncPalette *palette) |
| { |
| png_byte color_type; |
| png_structp png_ptr; |
| png_infop info_ptr; |
| png_colorp png_palette = NULL; |
| pixman_image_t *linebuf; |
| int level = tight_png_conf[vs->tight->compression].png_zlib_level; |
| int filters = tight_png_conf[vs->tight->compression].png_filters; |
| uint8_t *buf; |
| int dy; |
| |
| png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, |
| NULL, vnc_png_malloc, vnc_png_free); |
| |
| if (png_ptr == NULL) |
| return -1; |
| |
| info_ptr = png_create_info_struct(png_ptr); |
| |
| if (info_ptr == NULL) { |
| png_destroy_write_struct(&png_ptr, NULL); |
| return -1; |
| } |
| |
| png_set_write_fn(png_ptr, (void *) vs, png_write_data, png_flush_data); |
| png_set_compression_level(png_ptr, level); |
| png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters); |
| |
| if (palette) { |
| color_type = PNG_COLOR_TYPE_PALETTE; |
| } else { |
| color_type = PNG_COLOR_TYPE_RGB; |
| } |
| |
| png_set_IHDR(png_ptr, info_ptr, w, h, |
| 8, color_type, PNG_INTERLACE_NONE, |
| PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); |
| |
| if (color_type == PNG_COLOR_TYPE_PALETTE) { |
| struct palette_cb_priv priv; |
| |
| png_palette = png_malloc(png_ptr, sizeof(*png_palette) * |
| palette_size(palette)); |
| |
| priv.vs = vs; |
| priv.png_palette = png_palette; |
| palette_iter(palette, write_png_palette, &priv); |
| |
| png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette)); |
| |
| if (vs->client_pf.bytes_per_pixel == 4) { |
| tight_encode_indexed_rect32(vs->tight->tight.buffer, w * h, |
| palette); |
| } else { |
| tight_encode_indexed_rect16(vs->tight->tight.buffer, w * h, |
| palette); |
| } |
| } |
| |
| png_write_info(png_ptr, info_ptr); |
| |
| buffer_reserve(&vs->tight->png, 2048); |
| linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w); |
| buf = (uint8_t *)pixman_image_get_data(linebuf); |
| for (dy = 0; dy < h; dy++) |
| { |
| if (color_type == PNG_COLOR_TYPE_PALETTE) { |
| memcpy(buf, vs->tight->tight.buffer + (dy * w), w); |
| } else { |
| qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy); |
| } |
| png_write_row(png_ptr, buf); |
| } |
| qemu_pixman_image_unref(linebuf); |
| |
| png_write_end(png_ptr, NULL); |
| |
| if (color_type == PNG_COLOR_TYPE_PALETTE) { |
| png_free(png_ptr, png_palette); |
| } |
| |
| png_destroy_write_struct(&png_ptr, &info_ptr); |
| |
| vnc_write_u8(vs, VNC_TIGHT_PNG << 4); |
| |
| tight_send_compact_size(vs, vs->tight->png.offset); |
| vnc_write(vs, vs->tight->png.buffer, vs->tight->png.offset); |
| buffer_reset(&vs->tight->png); |
| return 1; |
| } |
| #endif /* CONFIG_PNG */ |
| |
| static void vnc_tight_start(VncState *vs) |
| { |
| buffer_reset(&vs->tight->tight); |
| |
| // make the output buffer be the zlib buffer, so we can compress it later |
| vs->tight->tmp = vs->output; |
| vs->output = vs->tight->tight; |
| } |
| |
| static void vnc_tight_stop(VncState *vs) |
| { |
| // switch back to normal output/zlib buffers |
| vs->tight->tight = vs->output; |
| vs->output = vs->tight->tmp; |
| } |
| |
| static int send_sub_rect_nojpeg(VncState *vs, int x, int y, int w, int h, |
| int bg, int fg, int colors, VncPalette *palette) |
| { |
| int ret; |
| |
| if (colors == 0) { |
| if (tight_detect_smooth_image(vs, w, h)) { |
| ret = send_gradient_rect(vs, x, y, w, h); |
| } else { |
| ret = send_full_color_rect(vs, x, y, w, h); |
| } |
| } else if (colors == 1) { |
| ret = send_solid_rect(vs); |
| } else if (colors == 2) { |
| ret = send_mono_rect(vs, x, y, w, h, bg, fg); |
| } else if (colors <= 256) { |
| ret = send_palette_rect(vs, x, y, w, h, palette); |
| } else { |
| ret = 0; |
| } |
| return ret; |
| } |
| |
| #ifdef CONFIG_VNC_JPEG |
| static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h, |
| int bg, int fg, int colors, |
| VncPalette *palette, bool force) |
| { |
| int ret; |
| |
| if (colors == 0) { |
| if (force || (tight_jpeg_conf[vs->tight->quality].jpeg_full && |
| tight_detect_smooth_image(vs, w, h))) { |
| int quality = tight_conf[vs->tight->quality].jpeg_quality; |
| |
| ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| } else { |
| ret = send_full_color_rect(vs, x, y, w, h); |
| } |
| } else if (colors == 1) { |
| ret = send_solid_rect(vs); |
| } else if (colors == 2) { |
| ret = send_mono_rect(vs, x, y, w, h, bg, fg); |
| } else if (colors <= 256) { |
| if (force || (colors > 96 && |
| tight_jpeg_conf[vs->tight->quality].jpeg_idx && |
| tight_detect_smooth_image(vs, w, h))) { |
| int quality = tight_conf[vs->tight->quality].jpeg_quality; |
| |
| ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| } else { |
| ret = send_palette_rect(vs, x, y, w, h, palette); |
| } |
| } else { |
| ret = 0; |
| } |
| return ret; |
| } |
| #endif |
| |
| static __thread VncPalette *color_count_palette; |
| static __thread Notifier vnc_tight_cleanup_notifier; |
| |
| static void vnc_tight_cleanup(Notifier *n, void *value) |
| { |
| g_free(color_count_palette); |
| color_count_palette = NULL; |
| } |
| |
| static int send_sub_rect(VncState *vs, int x, int y, int w, int h) |
| { |
| uint32_t bg = 0, fg = 0; |
| int colors; |
| int ret = 0; |
| #ifdef CONFIG_VNC_JPEG |
| bool force_jpeg = false; |
| bool allow_jpeg = true; |
| #endif |
| |
| if (!color_count_palette) { |
| color_count_palette = g_new(VncPalette, 1); |
| vnc_tight_cleanup_notifier.notify = vnc_tight_cleanup; |
| qemu_thread_atexit_add(&vnc_tight_cleanup_notifier); |
| } |
| |
| vnc_framebuffer_update(vs, x, y, w, h, vs->tight->type); |
| |
| vnc_tight_start(vs); |
| vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| vnc_tight_stop(vs); |
| |
| #ifdef CONFIG_VNC_JPEG |
| if (!vs->vd->non_adaptive && vs->tight->quality != (uint8_t)-1) { |
| double freq = vnc_update_freq(vs, x, y, w, h); |
| |
| if (freq < tight_jpeg_conf[vs->tight->quality].jpeg_freq_min) { |
| allow_jpeg = false; |
| } |
| if (freq >= tight_jpeg_conf[vs->tight->quality].jpeg_freq_threshold) { |
| force_jpeg = true; |
| vnc_sent_lossy_rect(vs, x, y, w, h); |
| } |
| } |
| #endif |
| |
| colors = tight_fill_palette(vs, x, y, w * h, &bg, &fg, color_count_palette); |
| |
| #ifdef CONFIG_VNC_JPEG |
| if (allow_jpeg && vs->tight->quality != (uint8_t)-1) { |
| ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, |
| color_count_palette, force_jpeg); |
| } else { |
| ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, |
| color_count_palette); |
| } |
| #else |
| ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, |
| color_count_palette); |
| #endif |
| |
| return ret; |
| } |
| |
| static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h) |
| { |
| vnc_framebuffer_update(vs, x, y, w, h, vs->tight->type); |
| |
| vnc_tight_start(vs); |
| vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| vnc_tight_stop(vs); |
| |
| return send_solid_rect(vs); |
| } |
| |
| static int send_rect_simple(VncState *vs, int x, int y, int w, int h, |
| bool split) |
| { |
| int max_size, max_width; |
| int max_sub_width, max_sub_height; |
| int dx, dy; |
| int rw, rh; |
| int n = 0; |
| |
| max_size = tight_conf[vs->tight->compression].max_rect_size; |
| max_width = tight_conf[vs->tight->compression].max_rect_width; |
| |
| if (split && (w > max_width || w * h > max_size)) { |
| max_sub_width = (w > max_width) ? max_width : w; |
| max_sub_height = max_size / max_sub_width; |
| |
| for (dy = 0; dy < h; dy += max_sub_height) { |
| for (dx = 0; dx < w; dx += max_width) { |
| rw = MIN(max_sub_width, w - dx); |
| rh = MIN(max_sub_height, h - dy); |
| n += send_sub_rect(vs, x+dx, y+dy, rw, rh); |
| } |
| } |
| } else { |
| n += send_sub_rect(vs, x, y, w, h); |
| } |
| |
| return n; |
| } |
| |
| static int find_large_solid_color_rect(VncState *vs, int x, int y, |
| int w, int h, int max_rows) |
| { |
| int dx, dy, dw, dh; |
| int n = 0; |
| |
| /* Try to find large solid-color areas and send them separately. */ |
| |
| for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| |
| /* If a rectangle becomes too large, send its upper part now. */ |
| |
| if (dy - y >= max_rows) { |
| n += send_rect_simple(vs, x, y, w, max_rows, true); |
| y += max_rows; |
| h -= max_rows; |
| } |
| |
| dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy)); |
| |
| for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| uint32_t color_value; |
| int x_best, y_best, w_best, h_best; |
| |
| dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx)); |
| |
| if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) { |
| continue ; |
| } |
| |
| /* Get dimensions of solid-color area. */ |
| |
| find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y), |
| color_value, &w_best, &h_best); |
| |
| /* Make sure a solid rectangle is large enough |
| (or the whole rectangle is of the same color). */ |
| |
| if (w_best * h_best != w * h && |
| w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) { |
| continue; |
| } |
| |
| /* Try to extend solid rectangle to maximum size. */ |
| |
| x_best = dx; y_best = dy; |
| extend_solid_area(vs, x, y, w, h, color_value, |
| &x_best, &y_best, &w_best, &h_best); |
| |
| /* Send rectangles at top and left to solid-color area. */ |
| |
| if (y_best != y) { |
| n += send_rect_simple(vs, x, y, w, y_best-y, true); |
| } |
| if (x_best != x) { |
| n += tight_send_framebuffer_update(vs, x, y_best, |
| x_best-x, h_best); |
| } |
| |
| /* Send solid-color rectangle. */ |
| n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best); |
| |
| /* Send remaining rectangles (at right and bottom). */ |
| |
| if (x_best + w_best != x + w) { |
| n += tight_send_framebuffer_update(vs, x_best+w_best, |
| y_best, |
| w-(x_best-x)-w_best, |
| h_best); |
| } |
| if (y_best + h_best != y + h) { |
| n += tight_send_framebuffer_update(vs, x, y_best+h_best, |
| w, h-(y_best-y)-h_best); |
| } |
| |
| /* Return after all recursive calls are done. */ |
| return n; |
| } |
| } |
| return n + send_rect_simple(vs, x, y, w, h, true); |
| } |
| |
| static int tight_send_framebuffer_update(VncState *vs, int x, int y, |
| int w, int h) |
| { |
| int max_rows; |
| |
| if (vs->client_pf.bytes_per_pixel == 4 && vs->client_pf.rmax == 0xFF && |
| vs->client_pf.bmax == 0xFF && vs->client_pf.gmax == 0xFF) { |
| vs->tight->pixel24 = true; |
| } else { |
| vs->tight->pixel24 = false; |
| } |
| |
| #ifdef CONFIG_VNC_JPEG |
| if (vs->tight->quality != (uint8_t)-1) { |
| double freq = vnc_update_freq(vs, x, y, w, h); |
| |
| if (freq > tight_jpeg_conf[vs->tight->quality].jpeg_freq_threshold) { |
| return send_rect_simple(vs, x, y, w, h, false); |
| } |
| } |
| #endif |
| |
| if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) { |
| return send_rect_simple(vs, x, y, w, h, true); |
| } |
| |
| /* Calculate maximum number of rows in one non-solid rectangle. */ |
| |
| max_rows = tight_conf[vs->tight->compression].max_rect_size; |
| max_rows /= MIN(tight_conf[vs->tight->compression].max_rect_width, w); |
| |
| return find_large_solid_color_rect(vs, x, y, w, h, max_rows); |
| } |
| |
| int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, |
| int w, int h) |
| { |
| vs->tight->type = VNC_ENCODING_TIGHT; |
| return tight_send_framebuffer_update(vs, x, y, w, h); |
| } |
| |
| int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, |
| int w, int h) |
| { |
| vs->tight->type = VNC_ENCODING_TIGHT_PNG; |
| return tight_send_framebuffer_update(vs, x, y, w, h); |
| } |
| |
| void vnc_tight_clear(VncState *vs) |
| { |
| int i; |
| for (i = 0; i < ARRAY_SIZE(vs->tight->stream); i++) { |
| if (vs->tight->stream[i].opaque) { |
| deflateEnd(&vs->tight->stream[i]); |
| } |
| } |
| |
| buffer_free(&vs->tight->tight); |
| buffer_free(&vs->tight->zlib); |
| buffer_free(&vs->tight->gradient); |
| #ifdef CONFIG_VNC_JPEG |
| buffer_free(&vs->tight->jpeg); |
| #endif |
| #ifdef CONFIG_PNG |
| buffer_free(&vs->tight->png); |
| #endif |
| } |
