diff options
Diffstat (limited to 'qemu/ui/vnc-enc-zlib.c')
| -rw-r--r-- | qemu/ui/vnc-enc-zlib.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/qemu/ui/vnc-enc-zlib.c b/qemu/ui/vnc-enc-zlib.c deleted file mode 100644 index 33e9df2f6..000000000 --- a/qemu/ui/vnc-enc-zlib.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * QEMU VNC display driver: zlib encoding - * - * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws> - * Copyright (C) 2006 Fabrice Bellard - * Copyright (C) 2009 Red Hat, Inc - * - * 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" - -#define ZALLOC_ALIGNMENT 16 - -void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size) -{ - void *p; - - size *= items; - size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); - - p = g_malloc0(size); - - return (p); -} - -void vnc_zlib_zfree(void *x, void *addr) -{ - g_free(addr); -} - -static void vnc_zlib_start(VncState *vs) -{ - buffer_reset(&vs->zlib.zlib); - - // make the output buffer be the zlib buffer, so we can compress it later - vs->zlib.tmp = vs->output; - vs->output = vs->zlib.zlib; -} - -static int vnc_zlib_stop(VncState *vs) -{ - z_streamp zstream = &vs->zlib.stream; - int previous_out; - - // switch back to normal output/zlib buffers - vs->zlib.zlib = vs->output; - vs->output = vs->zlib.tmp; - - // compress the zlib buffer - - // initialize the stream - // XXX need one stream per session - if (zstream->opaque != vs) { - int err; - - VNC_DEBUG("VNC: initializing zlib stream\n"); - VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs); - zstream->zalloc = vnc_zlib_zalloc; - zstream->zfree = vnc_zlib_zfree; - - err = deflateInit2(zstream, vs->tight.compression, Z_DEFLATED, MAX_WBITS, - MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY); - - if (err != Z_OK) { - fprintf(stderr, "VNC: error initializing zlib\n"); - return -1; - } - - vs->zlib.level = vs->tight.compression; - zstream->opaque = vs; - } - - if (vs->tight.compression != vs->zlib.level) { - if (deflateParams(zstream, vs->tight.compression, - Z_DEFAULT_STRATEGY) != Z_OK) { - return -1; - } - vs->zlib.level = vs->tight.compression; - } - - // reserve memory in output buffer - buffer_reserve(&vs->output, vs->zlib.zlib.offset + 64); - - // set pointers - zstream->next_in = vs->zlib.zlib.buffer; - zstream->avail_in = vs->zlib.zlib.offset; - zstream->next_out = vs->output.buffer + vs->output.offset; - zstream->avail_out = vs->output.capacity - vs->output.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 zlib compression\n"); - return -1; - } - - vs->output.offset = vs->output.capacity - zstream->avail_out; - return previous_out - zstream->avail_out; -} - -int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) -{ - int old_offset, new_offset, bytes_written; - - vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB); - - // remember where we put in the follow-up size - old_offset = vs->output.offset; - vnc_write_s32(vs, 0); - - // compress the stream - vnc_zlib_start(vs); - vnc_raw_send_framebuffer_update(vs, x, y, w, h); - bytes_written = vnc_zlib_stop(vs); - - if (bytes_written == -1) - return 0; - - // hack in the size - new_offset = vs->output.offset; - vs->output.offset = old_offset; - vnc_write_u32(vs, bytes_written); - vs->output.offset = new_offset; - - return 1; -} - -void vnc_zlib_clear(VncState *vs) -{ - if (vs->zlib.stream.opaque) { - deflateEnd(&vs->zlib.stream); - } - buffer_free(&vs->zlib.zlib); -} |