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, text is interpreted as glyphs instead of UTF-16
29 #define RENDER_TEXT_AS_GLYPHS 1
30
31 // Indicates whether to remove the biggest layers first, or the smaller ones
32 #define LAYER_REMOVE_BIGGEST_FIRST 0
33
34 // Textures used by layers must have dimensions multiples of this number
35 #define LAYER_SIZE 64
36
37 // Defines the size in bits of the stencil buffer
38 // Note: Only 1 bit is required for clipping but more bits are required
39 // to properly implement the winding fill rule when rasterizing paths
40 #define STENCIL_BUFFER_SIZE 8
41
42 /**
43 * Debug level for app developers. The value is a numeric value defined
44 * by the DebugLevel enum below.
45 */
46 #define PROPERTY_DEBUG "debug.hwui.level"
47
48 /**
49 * Debug levels. Debug levels are used as flags.
50 */
51 enum DebugLevel {
52 kDebugDisabled = 0,
53 kDebugMemory = 1,
54 kDebugCaches = 2,
55 kDebugMoreCaches = kDebugMemory | kDebugCaches
56 };
57
58 /**
59 * Used to enable/disable layers update debugging. The accepted values are
60 * "true" and "false". The default value is "false".
61 */
62 #define PROPERTY_DEBUG_LAYERS_UPDATES "debug.hwui.show_layers_updates"
63
64 /**
65 * Used to enable/disable overdraw debugging. The accepted values are
66 * "true" and "false". The default value is "false".
67 */
68 #define PROPERTY_DEBUG_OVERDRAW "debug.hwui.show_overdraw"
69
70 /**
71 * Used to enable/disable scissor optimization. The accepted values are
72 * "true" and "false". The default value is "false".
73 *
74 * When scissor optimization is enabled, OpenGLRenderer will attempt to
75 * minimize the use of scissor by selectively enabling and disabling the
76 * GL scissor test.
77 * When the optimization is disabled, OpenGLRenderer will keep the GL
78 * scissor test enabled and change the scissor rect as needed.
79 * Some GPUs (for instance the SGX 540) perform better when changing
80 * the scissor rect often than when enabling/disabling the scissor test
81 * often.
82 */
83 #define PROPERTY_DISABLE_SCISSOR_OPTIMIZATION "ro.hwui.disable_scissor_opt"
84
85 // These properties are defined in mega-bytes
86 #define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size"
87 #define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size"
88 #define PROPERTY_GRADIENT_CACHE_SIZE "ro.hwui.gradient_cache_size"
89 #define PROPERTY_PATH_CACHE_SIZE "ro.hwui.path_cache_size"
90 #define PROPERTY_SHAPE_CACHE_SIZE "ro.hwui.shape_cache_size"
91 #define PROPERTY_DROP_SHADOW_CACHE_SIZE "ro.hwui.drop_shadow_cache_size"
92 #define PROPERTY_FBO_CACHE_SIZE "ro.hwui.fbo_cache_size"
93
94 // These properties are defined in percentage (range 0..1)
95 #define PROPERTY_TEXTURE_CACHE_FLUSH_RATE "ro.hwui.texture_cache_flush_rate"
96
97 // These properties are defined in pixels
98 #define PROPERTY_TEXT_SMALL_CACHE_WIDTH "ro.hwui.text_small_cache_width"
99 #define PROPERTY_TEXT_SMALL_CACHE_HEIGHT "ro.hwui.text_small_cache_height"
100 #define PROPERTY_TEXT_LARGE_CACHE_WIDTH "ro.hwui.text_large_cache_width"
101 #define PROPERTY_TEXT_LARGE_CACHE_HEIGHT "ro.hwui.text_large_cache_height"
102
103 // Indicates whether gamma correction should be applied in the shaders
104 // or in lookup tables. Accepted values:
105 //
106 // - "lookup3", correction based on lookup tables. Gamma correction
107 // is different for black and white text (see thresholds below)
108 //
109 // - "lookup", correction based on a single lookup table
110 //
111 // - "shader3", correction applied by a GLSL shader. Gamma correction
112 // is different for black and white text (see thresholds below)
113 //
114 // - "shader", correction applied by a GLSL shader
115 //
116 // See PROPERTY_TEXT_GAMMA, PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD and
117 // PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD for more control.
118 #define PROPERTY_TEXT_GAMMA_METHOD "hwui.text_gamma_correction"
119 #define DEFAULT_TEXT_GAMMA_METHOD "lookup"
120
121 // Gamma (>= 1.0, <= 10.0)
122 #define PROPERTY_TEXT_GAMMA "hwui.text_gamma"
123 // Luminance threshold below which black gamma correction is applied. Range: [0..255]
124 #define PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD "hwui.text_gamma.black_threshold"
125 // Lumincance threshold above which white gamma correction is applied. Range: [0..255]
126 #define PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD "hwui.text_gamma.white_threshold"
127
128 // Converts a number of mega-bytes into bytes
129 #define MB(s) s * 1024 * 1024
130
131 #define DEFAULT_TEXTURE_CACHE_SIZE 24.0f
132 #define DEFAULT_LAYER_CACHE_SIZE 16.0f
133 #define DEFAULT_PATH_CACHE_SIZE 4.0f
134 #define DEFAULT_SHAPE_CACHE_SIZE 1.0f
135 #define DEFAULT_PATCH_CACHE_SIZE 512
136 #define DEFAULT_GRADIENT_CACHE_SIZE 0.5f
137 #define DEFAULT_DROP_SHADOW_CACHE_SIZE 2.0f
138 #define DEFAULT_FBO_CACHE_SIZE 16
139
140 #define DEFAULT_TEXTURE_CACHE_FLUSH_RATE 0.6f
141
142 #define DEFAULT_TEXT_GAMMA 1.4f
143 #define DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD 64
144 #define DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD 192
145
readDebugLevel()146 static DebugLevel readDebugLevel() {
147 char property[PROPERTY_VALUE_MAX];
148 if (property_get(PROPERTY_DEBUG, property, NULL) > 0) {
149 return (DebugLevel) atoi(property);
150 }
151 return kDebugDisabled;
152 }
153
154 #endif // ANDROID_HWUI_PROPERTIES_H
155