1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_HWUI_FONT_UTIL_H
18 #define ANDROID_HWUI_FONT_UTIL_H
19 
20 #include <SkUtils.h>
21 
22 #include "Properties.h"
23 
24 ///////////////////////////////////////////////////////////////////////////////
25 // Defines
26 ///////////////////////////////////////////////////////////////////////////////
27 
28 #ifdef TEXTURE_BORDER_SIZE
29 #if TEXTURE_BORDER_SIZE != 1
30 #error TEXTURE_BORDER_SIZE other than 1 is not currently supported
31 #endif
32 #else
33 #define TEXTURE_BORDER_SIZE 1
34 #endif
35 
36 #define CACHE_BLOCK_ROUNDING_SIZE 4
37 
38 typedef uint16_t glyph_t;
39 #define GET_METRICS(cache, glyph) cache->getGlyphIDMetrics(glyph)
40 #define IS_END_OF_STRING(glyph) false
41 
42 // prev, next are assumed to be signed x.6 fixed-point numbers with range
43 // [-1, 1]. Result is an integral float.
44 #define AUTO_KERN(prev, next) static_cast<float>(((next) - (prev) + 32) >> 6)
45 
46 #endif  // ANDROID_HWUI_FONT_UTIL_H
47