1 /*
2  * Copyright (c) 2020 - 2024 the ThorVG project. All rights reserved.
3 
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to deal
6  * in the Software without restriction, including without limitation the rights
7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  * copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10 
11  * The above copyright notice and this permission notice shall be included in all
12  * copies or substantial portions of the Software.
13 
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20  * SOFTWARE.
21  */
22 
23 #include "../../lv_conf_internal.h"
24 #if LV_USE_THORVG_INTERNAL
25 
26 #ifndef _TVG_LOAD_MODULE_H_
27 #define _TVG_LOAD_MODULE_H_
28 
29 #include "tvgRender.h"
30 #include "tvgInlist.h"
31 
32 
33 struct LoadModule
34 {
35     INLIST_ITEM(LoadModule);
36 
37     //Use either hashkey(data) or hashpath(path)
38     union {
39         uintptr_t hashkey;
40         char* hashpath = nullptr;
41     };
42 
43     FileType type;                                  //current loader file type
44     uint16_t sharing = 0;                           //reference count
45     bool readied = false;                           //read done already.
46     bool pathcache = false;                         //cached by path
47 
LoadModuleLoadModule48     LoadModule(FileType type) : type(type) {}
~LoadModuleLoadModule49     virtual ~LoadModule()
50     {
51         if (pathcache) free(hashpath);
52     }
53 
openLoadModule54     virtual bool open(const string& path) { return false; }
openLoadModule55     virtual bool open(const char* data, uint32_t size, bool copy) { return false; }
resizeLoadModule56     virtual bool resize(Paint* paint, float w, float h) { return false; }
syncLoadModule57     virtual void sync() {};  //finish immediately if any async update jobs.
58 
readLoadModule59     virtual bool read()
60     {
61         if (readied) return false;
62         readied = true;
63         return true;
64     }
65 
cachedLoadModule66     bool cached()
67     {
68         if (hashkey) return true;
69         return false;
70     }
71 
closeLoadModule72     virtual bool close()
73     {
74         if (sharing == 0) return true;
75         --sharing;
76         return false;
77     }
78 };
79 
80 
81 struct ImageLoader : LoadModule
82 {
83     static ColorSpace cs;                           //desired value
84 
85     float w = 0, h = 0;                             //default image size
86     RenderSurface surface;
87 
ImageLoaderImageLoader88     ImageLoader(FileType type) : LoadModule(type) {}
89 
animatableImageLoader90     virtual bool animatable() { return false; }  //true if this loader supports animation.
paintImageLoader91     virtual Paint* paint() { return nullptr; }
92 
bitmapImageLoader93     virtual RenderSurface* bitmap()
94     {
95         if (surface.data) return &surface;
96         return nullptr;
97     }
98 };
99 
100 
101 struct FontLoader : LoadModule
102 {
103     float scale = 1.0f;
104 
FontLoaderFontLoader105     FontLoader(FileType type) : LoadModule(type) {}
106 
107     virtual bool request(Shape* shape, char* text) = 0;
108     virtual bool transform(Paint* paint, float fontSize, bool italic) = 0;
109 };
110 
111 #endif //_TVG_LOAD_MODULE_H_
112 
113 #endif /* LV_USE_THORVG_INTERNAL */
114 
115