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      1 /**************************************************************************
      2  *
      3  * Copyright 2010 VMware, Inc.  All Rights Reserved.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sub license, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  *
     25  **************************************************************************/
     26 
     27 
     28 /**
     29  * Convert opaque VG object handles into pointers and vice versa.
     30  * XXX This is not yet 64-bit safe!  All VG handles are 32 bits in size.
     31  */
     32 
     33 
     34 #ifndef HANDLE_H
     35 #define HANDLE_H
     36 
     37 #include "pipe/p_compiler.h"
     38 #include "util/u_hash_table.h"
     39 #include "util/u_pointer.h"
     40 
     41 #include "VG/openvg.h"
     42 #include "vg_context.h"
     43 
     44 
     45 extern struct util_hash_table *handle_hash;
     46 
     47 
     48 struct vg_mask_layer;
     49 struct vg_font;
     50 struct vg_image;
     51 struct vg_paint;
     52 struct path;
     53 
     54 
     55 extern void
     56 init_handles(void);
     57 
     58 
     59 extern void
     60 free_handles(void);
     61 
     62 
     63 extern VGHandle
     64 create_handle(void *object);
     65 
     66 
     67 extern void
     68 destroy_handle(VGHandle h);
     69 
     70 
     71 static INLINE VGHandle
     72 object_to_handle(struct vg_object *obj)
     73 {
     74    return obj ? obj->handle : VG_INVALID_HANDLE;
     75 }
     76 
     77 
     78 static INLINE VGHandle
     79 image_to_handle(struct vg_image *img)
     80 {
     81    /* vg_image is derived from vg_object */
     82    return object_to_handle((struct vg_object *) img);
     83 }
     84 
     85 
     86 static INLINE VGHandle
     87 masklayer_to_handle(struct vg_mask_layer *mask)
     88 {
     89    /* vg_object is derived from vg_object */
     90    return object_to_handle((struct vg_object *) mask);
     91 }
     92 
     93 
     94 static INLINE VGHandle
     95 font_to_handle(struct vg_font *font)
     96 {
     97    return object_to_handle((struct vg_object *) font);
     98 }
     99 
    100 
    101 static INLINE VGHandle
    102 paint_to_handle(struct vg_paint *paint)
    103 {
    104    return object_to_handle((struct vg_object *) paint);
    105 }
    106 
    107 
    108 static INLINE VGHandle
    109 path_to_handle(struct path *path)
    110 {
    111    return object_to_handle((struct vg_object *) path);
    112 }
    113 
    114 
    115 static INLINE void *
    116 handle_to_pointer(VGHandle h)
    117 {
    118    void *v = util_hash_table_get(handle_hash, intptr_to_pointer(h));
    119 #ifdef DEBUG
    120    if (v) {
    121       struct vg_object *obj = (struct vg_object *) v;
    122       assert(obj->handle == h);
    123    }
    124 #endif
    125    return v;
    126 }
    127 
    128 
    129 static INLINE struct vg_font *
    130 handle_to_font(VGHandle h)
    131 {
    132    return (struct vg_font *) handle_to_pointer(h);
    133 }
    134 
    135 
    136 static INLINE struct vg_image *
    137 handle_to_image(VGHandle h)
    138 {
    139    return (struct vg_image *) handle_to_pointer(h);
    140 }
    141 
    142 
    143 static INLINE struct vg_mask_layer *
    144 handle_to_masklayer(VGHandle h)
    145 {
    146    return (struct vg_mask_layer *) handle_to_pointer(h);
    147 }
    148 
    149 
    150 static INLINE struct vg_object *
    151 handle_to_object(VGHandle h)
    152 {
    153    return (struct vg_object *) handle_to_pointer(h);
    154 }
    155 
    156 
    157 static INLINE struct vg_paint *
    158 handle_to_paint(VGHandle h)
    159 {
    160    return (struct vg_paint *) handle_to_pointer(h);
    161 }
    162 
    163 
    164 static INLINE struct path *
    165 handle_to_path(VGHandle h)
    166 {
    167    return (struct path *) handle_to_pointer(h);
    168 }
    169 
    170 
    171 #endif /* HANDLE_H */
    172