blob: caf089f6d2a54313fbfe4e52b48fc789c506ab43 [file] [log] [blame]
Romain Guy1e45aae2010-08-13 19:39:53 -07001/*
2 * Copyright (C) 2010 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
Romain Guy5b3b3522010-10-27 18:57:51 -070017#ifndef ANDROID_HWUI_TEXT_DROP_SHADOW_CACHE_H
18#define ANDROID_HWUI_TEXT_DROP_SHADOW_CACHE_H
Romain Guy1e45aae2010-08-13 19:39:53 -070019
20#include <GLES2/gl2.h>
21
22#include <SkPaint.h>
23
Romain Guy059e12c2012-11-28 17:35:51 -080024#include <utils/LruCache.h>
Romain Guy321dce62011-03-01 11:45:33 -080025#include <utils/String16.h>
Romain Guy25dc3a72010-12-10 12:33:05 -080026
Tom Hudson2dc236b2014-10-15 15:46:42 -040027#include "font/Font.h"
Romain Guy1e45aae2010-08-13 19:39:53 -070028#include "Texture.h"
29
30namespace android {
31namespace uirenderer {
32
Romain Guy8aa195d2013-06-04 18:00:09 -070033class Caches;
Tom Hudson2dc236b2014-10-15 15:46:42 -040034class FontRenderer;
Romain Guy8aa195d2013-06-04 18:00:09 -070035
Romain Guy1e45aae2010-08-13 19:39:53 -070036struct ShadowText {
Chris Craike84a2082014-12-22 14:28:49 -080037 ShadowText(): len(0), radius(0.0f), textSize(0.0f), typeface(nullptr),
38 flags(0), italicStyle(0.0f), scaleX(0), text(nullptr), positions(nullptr) {
Romain Guyc4d8eb62010-08-18 20:48:33 -070039 }
Romain Guy1e45aae2010-08-13 19:39:53 -070040
Romain Guy69fcbcc2012-11-30 15:29:15 -080041 // len is the number of bytes in text
Chris Craikd218a922014-01-02 17:13:34 -080042 ShadowText(const SkPaint* paint, float radius, uint32_t len, const char* srcText,
Raph Levien416a8472012-07-19 22:48:17 -070043 const float* positions):
Romain Guy059e12c2012-11-28 17:35:51 -080044 len(len), radius(radius), positions(positions) {
Romain Guy321dce62011-03-01 11:45:33 -080045 // TODO: Propagate this through the API, we should not cast here
46 text = (const char16_t*) srcText;
Romain Guy1e45aae2010-08-13 19:39:53 -070047
Romain Guyc4d8eb62010-08-18 20:48:33 -070048 textSize = paint->getTextSize();
49 typeface = paint->getTypeface();
Romain Guycabfcc12011-03-07 18:06:46 -080050
51 flags = 0;
52 if (paint->isFakeBoldText()) {
53 flags |= Font::kFakeBold;
54 }
55
Romain Guy059e12c2012-11-28 17:35:51 -080056 italicStyle = paint->getTextSkewX();
57 scaleX = paint->getTextScaleX();
Romain Guy1e45aae2010-08-13 19:39:53 -070058 }
59
Romain Guy1e45aae2010-08-13 19:39:53 -070060 ~ShadowText() {
Romain Guy1e45aae2010-08-13 19:39:53 -070061 }
62
Romain Guy059e12c2012-11-28 17:35:51 -080063 hash_t hash() const;
64
65 static int compare(const ShadowText& lhs, const ShadowText& rhs);
66
67 bool operator==(const ShadowText& other) const {
68 return compare(*this, other) == 0;
69 }
70
71 bool operator!=(const ShadowText& other) const {
72 return compare(*this, other) != 0;
73 }
Romain Guy321dce62011-03-01 11:45:33 -080074
75 void copyTextLocally() {
Romain Guy69fcbcc2012-11-30 15:29:15 -080076 uint32_t charCount = len / sizeof(char16_t);
77 str.setTo((const char16_t*) text, charCount);
Romain Guy321dce62011-03-01 11:45:33 -080078 text = str.string();
Chris Craike84a2082014-12-22 14:28:49 -080079 if (positions != nullptr) {
Raph Levien416a8472012-07-19 22:48:17 -070080 positionsCopy.clear();
Romain Guy69fcbcc2012-11-30 15:29:15 -080081 positionsCopy.appendArray(positions, charCount * 2);
Raph Levien416a8472012-07-19 22:48:17 -070082 positions = positionsCopy.array();
83 }
Romain Guy321dce62011-03-01 11:45:33 -080084 }
Romain Guy1e45aae2010-08-13 19:39:53 -070085
Romain Guy059e12c2012-11-28 17:35:51 -080086 uint32_t len;
87 float radius;
88 float textSize;
89 SkTypeface* typeface;
90 uint32_t flags;
91 float italicStyle;
92 float scaleX;
93 const char16_t* text;
94 const float* positions;
95
96 // Not directly used to compute the cache key
97 String16 str;
98 Vector<float> positionsCopy;
99
Romain Guy1e45aae2010-08-13 19:39:53 -0700100}; // struct ShadowText
101
Romain Guy059e12c2012-11-28 17:35:51 -0800102// Caching support
103
104inline int strictly_order_type(const ShadowText& lhs, const ShadowText& rhs) {
105 return ShadowText::compare(lhs, rhs) < 0;
106}
107
108inline int compare_type(const ShadowText& lhs, const ShadowText& rhs) {
109 return ShadowText::compare(lhs, rhs);
110}
111
112inline hash_t hash_type(const ShadowText& entry) {
113 return entry.hash();
114}
115
Romain Guy1e45aae2010-08-13 19:39:53 -0700116/**
117 * Alpha texture used to represent a shadow.
118 */
119struct ShadowTexture: public Texture {
Romain Guy8aa195d2013-06-04 18:00:09 -0700120 ShadowTexture(Caches& caches): Texture(caches) {
Romain Guy1e45aae2010-08-13 19:39:53 -0700121 }
122
123 float left;
124 float top;
125}; // struct ShadowTexture
126
127class TextDropShadowCache: public OnEntryRemoved<ShadowText, ShadowTexture*> {
128public:
Romain Guyfb8b7632010-08-23 21:05:08 -0700129 TextDropShadowCache();
Romain Guy1e45aae2010-08-13 19:39:53 -0700130 TextDropShadowCache(uint32_t maxByteSize);
131 ~TextDropShadowCache();
132
133 /**
134 * Used as a callback when an entry is removed from the cache.
135 * Do not invoke directly.
136 */
Chris Craike84a2082014-12-22 14:28:49 -0800137 void operator()(ShadowText& text, ShadowTexture*& texture) override;
Romain Guy1e45aae2010-08-13 19:39:53 -0700138
Chris Craikd218a922014-01-02 17:13:34 -0800139 ShadowTexture* get(const SkPaint* paint, const char* text, uint32_t len,
Romain Guy059e12c2012-11-28 17:35:51 -0800140 int numGlyphs, float radius, const float* positions);
Romain Guy1e45aae2010-08-13 19:39:53 -0700141
142 /**
143 * Clears the cache. This causes all textures to be deleted.
144 */
145 void clear();
146
147 void setFontRenderer(FontRenderer& fontRenderer) {
148 mRenderer = &fontRenderer;
149 }
150
151 /**
152 * Sets the maximum size of the cache in bytes.
153 */
154 void setMaxSize(uint32_t maxSize);
155 /**
156 * Returns the maximum size of the cache in bytes.
157 */
158 uint32_t getMaxSize();
159 /**
160 * Returns the current size of the cache in bytes.
161 */
162 uint32_t getSize();
163
164private:
Romain Guy25dc3a72010-12-10 12:33:05 -0800165 void init();
166
Romain Guy059e12c2012-11-28 17:35:51 -0800167 LruCache<ShadowText, ShadowTexture*> mCache;
Romain Guy1e45aae2010-08-13 19:39:53 -0700168
169 uint32_t mSize;
170 uint32_t mMaxSize;
171 FontRenderer* mRenderer;
Romain Guy25dc3a72010-12-10 12:33:05 -0800172 bool mDebugEnabled;
Romain Guy1e45aae2010-08-13 19:39:53 -0700173}; // class TextDropShadowCache
174
175}; // namespace uirenderer
176}; // namespace android
177
Romain Guy5b3b3522010-10-27 18:57:51 -0700178#endif // ANDROID_HWUI_TEXT_DROP_SHADOW_CACHE_H