FontUtil.h revision cef190de850f163dd4b95d667a8d46d46e860363 
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#define DEFAULT_TEXT_SMALL_CACHE_WIDTH 1024
29#define DEFAULT_TEXT_SMALL_CACHE_HEIGHT 512
30#define DEFAULT_TEXT_LARGE_CACHE_WIDTH 2048
31#define DEFAULT_TEXT_LARGE_CACHE_HEIGHT 512
32
33#ifdef TEXTURE_BORDER_SIZE
34  #if TEXTURE_BORDER_SIZE != 1
35    #error TEXTURE_BORDER_SIZE other than 1 is not currently supported
36  #endif
37#else
38  #define TEXTURE_BORDER_SIZE 1
39#endif
40
41#define CACHE_BLOCK_ROUNDING_SIZE 4
42
43#if RENDER_TEXT_AS_GLYPHS
44    typedef uint16_t glyph_t;
45    #define TO_GLYPH(g) g
46    #define GET_METRICS(cache, glyph) cache->getGlyphIDMetrics(glyph)
47    #define GET_GLYPH(text) nextGlyph((const uint16_t**) &(text))
48    #define IS_END_OF_STRING(glyph) false
49
50    static inline glyph_t nextGlyph(const uint16_t** srcPtr) {
51        const uint16_t* src = *srcPtr;
52        glyph_t g = *src++;
53        *srcPtr = src;
54        return g;
55    }
56#else
57    typedef SkUnichar glyph_t;
58    #define TO_GLYPH(g) ((SkUnichar) g)
59    #define GET_METRICS(cache, glyph) cache->getUnicharMetrics(glyph)
60    #define GET_GLYPH(text) SkUTF16_NextUnichar((const uint16_t**) &text)
61    #define IS_END_OF_STRING(glyph) glyph < 0
62#endif
63
64#define AUTO_KERN(prev, next) (((next) - (prev) + 32) >> 6 << 16)
65
66#endif // ANDROID_HWUI_FONT_UTIL_H
67