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Annotation of qemu/ui/vnc-enc-hextile.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * QEMU VNC display driver: hextile encoding
        !             3:  *
        !             4:  * Copyright (C) 2006 Anthony Liguori <[email protected]>
        !             5:  * Copyright (C) 2006 Fabrice Bellard
        !             6:  * Copyright (C) 2009 Red Hat, Inc
        !             7:  *
        !             8:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             9:  * of this software and associated documentation files (the "Software"), to deal
        !            10:  * in the Software without restriction, including without limitation the rights
        !            11:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        !            12:  * copies of the Software, and to permit persons to whom the Software is
        !            13:  * furnished to do so, subject to the following conditions:
        !            14:  *
        !            15:  * The above copyright notice and this permission notice shall be included in
        !            16:  * all copies or substantial portions of the Software.
        !            17:  *
        !            18:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            19:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            20:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
        !            21:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            22:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        !            23:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
        !            24:  * THE SOFTWARE.
        !            25:  */
        !            26: 
        !            27: #include "vnc.h"
        !            28: 
        !            29: static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
        !            30: {
        !            31:     ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
        !            32:     ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
        !            33: }
        !            34: 
        !            35: #define BPP 8
        !            36: #include "vnc-enc-hextile-template.h"
        !            37: #undef BPP
        !            38: 
        !            39: #define BPP 16
        !            40: #include "vnc-enc-hextile-template.h"
        !            41: #undef BPP
        !            42: 
        !            43: #define BPP 32
        !            44: #include "vnc-enc-hextile-template.h"
        !            45: #undef BPP
        !            46: 
        !            47: #define GENERIC
        !            48: #define BPP 8
        !            49: #include "vnc-enc-hextile-template.h"
        !            50: #undef BPP
        !            51: #undef GENERIC
        !            52: 
        !            53: #define GENERIC
        !            54: #define BPP 16
        !            55: #include "vnc-enc-hextile-template.h"
        !            56: #undef BPP
        !            57: #undef GENERIC
        !            58: 
        !            59: #define GENERIC
        !            60: #define BPP 32
        !            61: #include "vnc-enc-hextile-template.h"
        !            62: #undef BPP
        !            63: #undef GENERIC
        !            64: 
        !            65: int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
        !            66:                                         int y, int w, int h)
        !            67: {
        !            68:     int i, j;
        !            69:     int has_fg, has_bg;
        !            70:     uint8_t *last_fg, *last_bg;
        !            71:     VncDisplay *vd = vs->vd;
        !            72: 
        !            73:     last_fg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
        !            74:     last_bg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
        !            75:     has_fg = has_bg = 0;
        !            76:     for (j = y; j < (y + h); j += 16) {
        !            77:         for (i = x; i < (x + w); i += 16) {
        !            78:             vs->hextile.send_tile(vs, i, j,
        !            79:                                   MIN(16, x + w - i), MIN(16, y + h - j),
        !            80:                                   last_bg, last_fg, &has_bg, &has_fg);
        !            81:         }
        !            82:     }
        !            83:     free(last_fg);
        !            84:     free(last_bg);
        !            85: 
        !            86:     return 1;
        !            87: }
        !            88: 
        !            89: void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
        !            90: {
        !            91:     if (!generic) {
        !            92:         switch (vs->ds->surface->pf.bits_per_pixel) {
        !            93:             case 8:
        !            94:                 vs->hextile.send_tile = send_hextile_tile_8;
        !            95:                 break;
        !            96:             case 16:
        !            97:                 vs->hextile.send_tile = send_hextile_tile_16;
        !            98:                 break;
        !            99:             case 32:
        !           100:                 vs->hextile.send_tile = send_hextile_tile_32;
        !           101:                 break;
        !           102:         }
        !           103:     } else {
        !           104:         switch (vs->ds->surface->pf.bits_per_pixel) {
        !           105:             case 8:
        !           106:                 vs->hextile.send_tile = send_hextile_tile_generic_8;
        !           107:                 break;
        !           108:             case 16:
        !           109:                 vs->hextile.send_tile = send_hextile_tile_generic_16;
        !           110:                 break;
        !           111:             case 32:
        !           112:                 vs->hextile.send_tile = send_hextile_tile_generic_32;
        !           113:                 break;
        !           114:         }
        !           115:     }
        !           116: }

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