Properties.h revision dfab50d8b97a90dca279b119ebe439f595616ffa 
1/*
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
17#ifndef ANDROID_HWUI_PROPERTIES_H
18#define ANDROID_HWUI_PROPERTIES_H
19
20#include <cutils/properties.h>
21#include <stdlib.h>
22
23/**
24 * This file contains the list of system properties used to configure
25 * the OpenGLRenderer.
26 */
27
28// If turned on, layers drawn inside FBOs are optimized with regions
29#define RENDER_LAYERS_AS_REGIONS 1
30
31// If turned on, text is interpreted as glyphs instead of UTF-16
32#define RENDER_TEXT_AS_GLYPHS 1
33
34// Indicates whether to remove the biggest layers first, or the smaller ones
35#define LAYER_REMOVE_BIGGEST_FIRST 0
36
37// Textures used by layers must have dimensions multiples of this number
38#define LAYER_SIZE 64
39
40// Defines the size in bits of the stencil buffer
41// Note: Only 1 bit is required for clipping but more bits are required
42// to properly implement the winding fill rule when rasterizing paths
43#define STENCIL_BUFFER_SIZE 0
44
45/**
46 * Debug level for app developers.
47 */
48#define PROPERTY_DEBUG "hwui.debug_level"
49
50/**
51 * Debug levels. Debug levels are used as flags.
52 */
53enum DebugLevel {
54    kDebugDisabled = 0,
55    kDebugMemory = 1,
56    kDebugCaches = 2,
57    kDebugMoreCaches = kDebugMemory | kDebugCaches
58};
59
60// These properties are defined in mega-bytes
61#define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size"
62#define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size"
63#define PROPERTY_GRADIENT_CACHE_SIZE "ro.hwui.gradient_cache_size"
64#define PROPERTY_PATH_CACHE_SIZE "ro.hwui.path_cache_size"
65#define PROPERTY_SHAPE_CACHE_SIZE "ro.hwui.shape_cache_size"
66#define PROPERTY_DROP_SHADOW_CACHE_SIZE "ro.hwui.drop_shadow_cache_size"
67#define PROPERTY_FBO_CACHE_SIZE "ro.hwui.fbo_cache_size"
68
69// These properties are defined in percentage (range 0..1)
70#define PROPERTY_TEXTURE_CACHE_FLUSH_RATE "ro.hwui.texture_cache_flush_rate"
71
72// These properties are defined in pixels
73#define PROPERTY_TEXT_CACHE_WIDTH "ro.hwui.text_cache_width"
74#define PROPERTY_TEXT_CACHE_HEIGHT "ro.hwui.text_cache_height"
75
76// Indicates whether gamma correction should be applied in the shaders
77// or in lookup tables. Accepted values:
78//
79//     - "lookup3", correction based on lookup tables. Gamma correction
80//        is different for black and white text (see thresholds below)
81//
82//     - "lookup", correction based on a single lookup table
83//
84//     - "shader3", correction applied by a GLSL shader. Gamma correction
85//        is different for black and white text (see thresholds below)
86//
87//     - "shader", correction applied by a GLSL shader
88//
89// See PROPERTY_TEXT_GAMMA, PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD and
90// PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD for more control.
91#define PROPERTY_TEXT_GAMMA_METHOD "hwui.text_gamma_correction"
92#define DEFAULT_TEXT_GAMMA_METHOD "lookup"
93
94// Gamma (>= 1.0, <= 10.0)
95#define PROPERTY_TEXT_GAMMA "hwui.text_gamma"
96// Luminance threshold below which black gamma correction is applied. Range: [0..255]
97#define PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD "hwui.text_gamma.black_threshold"
98// Lumincance threshold above which white gamma correction is applied. Range: [0..255]
99#define PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD "hwui.text_gamma.white_threshold"
100
101// Converts a number of mega-bytes into bytes
102#define MB(s) s * 1024 * 1024
103
104#define DEFAULT_TEXTURE_CACHE_SIZE 24.0f
105#define DEFAULT_LAYER_CACHE_SIZE 16.0f
106#define DEFAULT_PATH_CACHE_SIZE 4.0f
107#define DEFAULT_SHAPE_CACHE_SIZE 1.0f
108#define DEFAULT_PATCH_CACHE_SIZE 512
109#define DEFAULT_GRADIENT_CACHE_SIZE 0.5f
110#define DEFAULT_DROP_SHADOW_CACHE_SIZE 2.0f
111#define DEFAULT_FBO_CACHE_SIZE 16
112
113#define DEFAULT_TEXTURE_CACHE_FLUSH_RATE 0.6f
114
115#define DEFAULT_TEXT_GAMMA 1.4f
116#define DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD 64
117#define DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD 192
118
119static DebugLevel readDebugLevel() {
120    char property[PROPERTY_VALUE_MAX];
121    if (property_get(PROPERTY_DEBUG, property, NULL) > 0) {
122        return (DebugLevel) atoi(property);
123    }
124    return kDebugDisabled;
125}
126
127#endif // ANDROID_HWUI_PROPERTIES_H
128