diff options
Diffstat (limited to 'qemu/ui/vnc-enc-zrle.c')
| -rw-r--r-- | qemu/ui/vnc-enc-zrle.c | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/qemu/ui/vnc-enc-zrle.c b/qemu/ui/vnc-enc-zrle.c deleted file mode 100644 index 5489870e7..000000000 --- a/qemu/ui/vnc-enc-zrle.c +++ /dev/null @@ -1,367 +0,0 @@ -/* - * QEMU VNC display driver: Zlib Run-length Encoding (ZRLE) - * - * From libvncserver/libvncserver/zrle.c - * Copyright (C) 2002 RealVNC Ltd. All Rights Reserved. - * Copyright (C) 2003 Sun Microsystems, Inc. - * - * 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" -#include "vnc.h" -#include "vnc-enc-zrle.h" - -static const int bits_per_packed_pixel[] = { - 0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 -}; - - -static void vnc_zrle_start(VncState *vs) -{ - buffer_reset(&vs->zrle.zrle); - - /* make the output buffer be the zlib buffer, so we can compress it later */ - vs->zrle.tmp = vs->output; - vs->output = vs->zrle.zrle; -} - -static void vnc_zrle_stop(VncState *vs) -{ - /* switch back to normal output/zlib buffers */ - vs->zrle.zrle = vs->output; - vs->output = vs->zrle.tmp; -} - -static void *zrle_convert_fb(VncState *vs, int x, int y, int w, int h, - int bpp) -{ - Buffer tmp; - - buffer_reset(&vs->zrle.fb); - buffer_reserve(&vs->zrle.fb, w * h * bpp + bpp); - - tmp = vs->output; - vs->output = vs->zrle.fb; - - vnc_raw_send_framebuffer_update(vs, x, y, w, h); - - vs->zrle.fb = vs->output; - vs->output = tmp; - return vs->zrle.fb.buffer; -} - -static int zrle_compress_data(VncState *vs, int level) -{ - z_streamp zstream = &vs->zrle.stream; - - buffer_reset(&vs->zrle.zlib); - - if (zstream->opaque != vs) { - int err; - - zstream->zalloc = vnc_zlib_zalloc; - zstream->zfree = vnc_zlib_zfree; - - err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS, - MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY); - - if (err != Z_OK) { - fprintf(stderr, "VNC: error initializing zlib\n"); - return -1; - } - - zstream->opaque = vs; - } - - /* reserve memory in output buffer */ - buffer_reserve(&vs->zrle.zlib, vs->zrle.zrle.offset + 64); - - /* set pointers */ - zstream->next_in = vs->zrle.zrle.buffer; - zstream->avail_in = vs->zrle.zrle.offset; - zstream->next_out = vs->zrle.zlib.buffer + vs->zrle.zlib.offset; - zstream->avail_out = vs->zrle.zlib.capacity - vs->zrle.zlib.offset; - zstream->data_type = Z_BINARY; - - /* start encoding */ - if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) { - fprintf(stderr, "VNC: error during zrle compression\n"); - return -1; - } - - vs->zrle.zlib.offset = vs->zrle.zlib.capacity - zstream->avail_out; - return vs->zrle.zlib.offset; -} - -/* Try to work out whether to use RLE and/or a palette. We do this by - * estimating the number of bytes which will be generated and picking the - * method which results in the fewest bytes. Of course this may not result - * in the fewest bytes after compression... */ -static void zrle_choose_palette_rle(VncState *vs, int w, int h, - VncPalette *palette, int bpp_out, - int runs, int single_pixels, - int zywrle_level, - bool *use_rle, bool *use_palette) -{ - size_t estimated_bytes; - size_t plain_rle_bytes; - - *use_palette = *use_rle = false; - - estimated_bytes = w * h * (bpp_out / 8); /* start assuming raw */ - - if (bpp_out != 8) { - if (zywrle_level > 0 && !(zywrle_level & 0x80)) - estimated_bytes >>= zywrle_level; - } - - plain_rle_bytes = ((bpp_out / 8) + 1) * (runs + single_pixels); - - if (plain_rle_bytes < estimated_bytes) { - *use_rle = true; - estimated_bytes = plain_rle_bytes; - } - - if (palette_size(palette) < 128) { - int palette_rle_bytes; - - palette_rle_bytes = (bpp_out / 8) * palette_size(palette); - palette_rle_bytes += 2 * runs + single_pixels; - - if (palette_rle_bytes < estimated_bytes) { - *use_rle = true; - *use_palette = true; - estimated_bytes = palette_rle_bytes; - } - - if (palette_size(palette) < 17) { - int packed_bytes; - - packed_bytes = (bpp_out / 8) * palette_size(palette); - packed_bytes += w * h * - bits_per_packed_pixel[palette_size(palette)-1] / 8; - - if (packed_bytes < estimated_bytes) { - *use_rle = false; - *use_palette = true; - estimated_bytes = packed_bytes; - } - } - } -} - -static void zrle_write_u32(VncState *vs, uint32_t value) -{ - vnc_write(vs, (uint8_t *)&value, 4); -} - -static void zrle_write_u24a(VncState *vs, uint32_t value) -{ - vnc_write(vs, (uint8_t *)&value, 3); -} - -static void zrle_write_u24b(VncState *vs, uint32_t value) -{ - vnc_write(vs, ((uint8_t *)&value) + 1, 3); -} - -static void zrle_write_u16(VncState *vs, uint16_t value) -{ - vnc_write(vs, (uint8_t *)&value, 2); -} - -static void zrle_write_u8(VncState *vs, uint8_t value) -{ - vnc_write_u8(vs, value); -} - -#define ENDIAN_LITTLE 0 -#define ENDIAN_BIG 1 -#define ENDIAN_NO 2 - -#define ZRLE_BPP 8 -#define ZYWRLE_ENDIAN ENDIAN_NO -#include "vnc-enc-zrle-template.c" -#undef ZRLE_BPP - -#define ZRLE_BPP 15 -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_LITTLE -#include "vnc-enc-zrle-template.c" - -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_BIG -#include "vnc-enc-zrle-template.c" - -#undef ZRLE_BPP -#define ZRLE_BPP 16 -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_LITTLE -#include "vnc-enc-zrle-template.c" - -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_BIG -#include "vnc-enc-zrle-template.c" - -#undef ZRLE_BPP -#define ZRLE_BPP 32 -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_LITTLE -#include "vnc-enc-zrle-template.c" - -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_BIG -#include "vnc-enc-zrle-template.c" - -#define ZRLE_COMPACT_PIXEL 24a -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_LITTLE -#include "vnc-enc-zrle-template.c" - -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_BIG -#include "vnc-enc-zrle-template.c" - -#undef ZRLE_COMPACT_PIXEL -#define ZRLE_COMPACT_PIXEL 24b -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_LITTLE -#include "vnc-enc-zrle-template.c" - -#undef ZYWRLE_ENDIAN -#define ZYWRLE_ENDIAN ENDIAN_BIG -#include "vnc-enc-zrle-template.c" -#undef ZRLE_COMPACT_PIXEL -#undef ZRLE_BPP - -static int zrle_send_framebuffer_update(VncState *vs, int x, int y, - int w, int h) -{ - bool be = vs->client_be; - size_t bytes; - int zywrle_level; - - if (vs->zrle.type == VNC_ENCODING_ZYWRLE) { - if (!vs->vd->lossy || vs->tight.quality == (uint8_t)-1 - || vs->tight.quality == 9) { - zywrle_level = 0; - vs->zrle.type = VNC_ENCODING_ZRLE; - } else if (vs->tight.quality < 3) { - zywrle_level = 3; - } else if (vs->tight.quality < 6) { - zywrle_level = 2; - } else { - zywrle_level = 1; - } - } else { - zywrle_level = 0; - } - - vnc_zrle_start(vs); - - switch (vs->client_pf.bytes_per_pixel) { - case 1: - zrle_encode_8ne(vs, x, y, w, h, zywrle_level); - break; - - case 2: - if (vs->client_pf.gmax > 0x1F) { - if (be) { - zrle_encode_16be(vs, x, y, w, h, zywrle_level); - } else { - zrle_encode_16le(vs, x, y, w, h, zywrle_level); - } - } else { - if (be) { - zrle_encode_15be(vs, x, y, w, h, zywrle_level); - } else { - zrle_encode_15le(vs, x, y, w, h, zywrle_level); - } - } - break; - - case 4: - { - bool fits_in_ls3bytes; - bool fits_in_ms3bytes; - - fits_in_ls3bytes = - ((vs->client_pf.rmax << vs->client_pf.rshift) < (1 << 24) && - (vs->client_pf.gmax << vs->client_pf.gshift) < (1 << 24) && - (vs->client_pf.bmax << vs->client_pf.bshift) < (1 << 24)); - - fits_in_ms3bytes = (vs->client_pf.rshift > 7 && - vs->client_pf.gshift > 7 && - vs->client_pf.bshift > 7); - - if ((fits_in_ls3bytes && !be) || (fits_in_ms3bytes && be)) { - if (be) { - zrle_encode_24abe(vs, x, y, w, h, zywrle_level); - } else { - zrle_encode_24ale(vs, x, y, w, h, zywrle_level); - } - } else if ((fits_in_ls3bytes && be) || (fits_in_ms3bytes && !be)) { - if (be) { - zrle_encode_24bbe(vs, x, y, w, h, zywrle_level); - } else { - zrle_encode_24ble(vs, x, y, w, h, zywrle_level); - } - } else { - if (be) { - zrle_encode_32be(vs, x, y, w, h, zywrle_level); - } else { - zrle_encode_32le(vs, x, y, w, h, zywrle_level); - } - } - } - break; - } - - vnc_zrle_stop(vs); - bytes = zrle_compress_data(vs, Z_DEFAULT_COMPRESSION); - vnc_framebuffer_update(vs, x, y, w, h, vs->zrle.type); - vnc_write_u32(vs, bytes); - vnc_write(vs, vs->zrle.zlib.buffer, vs->zrle.zlib.offset); - return 1; -} - -int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) -{ - vs->zrle.type = VNC_ENCODING_ZRLE; - return zrle_send_framebuffer_update(vs, x, y, w, h); -} - -int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) -{ - vs->zrle.type = VNC_ENCODING_ZYWRLE; - return zrle_send_framebuffer_update(vs, x, y, w, h); -} - -void vnc_zrle_clear(VncState *vs) -{ - if (vs->zrle.stream.opaque) { - deflateEnd(&vs->zrle.stream); - } - buffer_free(&vs->zrle.zrle); - buffer_free(&vs->zrle.fb); - buffer_free(&vs->zrle.zlib); -} |