Home | History | Annotate | Download | only in hwui 
      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 ///////////////////////////////////////////////////////////////////////////////
     29 // Compile-time properties
     30 ///////////////////////////////////////////////////////////////////////////////
     31 
     32 // If turned on, text is interpreted as glyphs instead of UTF-16
     33 #define RENDER_TEXT_AS_GLYPHS 1
     34 
     35 // Indicates whether to remove the biggest layers first, or the smaller ones
     36 #define LAYER_REMOVE_BIGGEST_FIRST 0
     37 
     38 // Textures used by layers must have dimensions multiples of this number
     39 #define LAYER_SIZE 64
     40 
     41 // Defines the size in bits of the stencil buffer for the framebuffer
     42 // Note: Only 1 bit is required for clipping but more bits are required
     43 // to properly implement overdraw debugging
     44 #define STENCIL_BUFFER_SIZE 8
     45 
     46 ///////////////////////////////////////////////////////////////////////////////
     47 // Debug properties
     48 ///////////////////////////////////////////////////////////////////////////////
     49 
     50 /**
     51  * Debug level for app developers. The value is a numeric value defined
     52  * by the DebugLevel enum below.
     53  */
     54 #define PROPERTY_DEBUG "debug.hwui.level"
     55 
     56 /**
     57  * Debug levels. Debug levels are used as flags.
     58  */
     59 enum DebugLevel {
     60     kDebugDisabled = 0,
     61     kDebugMemory = 1,
     62     kDebugCaches = 2,
     63     kDebugMoreCaches = kDebugMemory | kDebugCaches
     64 };
     65 
     66 /**
     67  * Used to enable/disable layers update debugging. The accepted values are
     68  * "true" and "false". The default value is "false".
     69  */
     70 #define PROPERTY_DEBUG_LAYERS_UPDATES "debug.hwui.show_layers_updates"
     71 
     72 /**
     73  * Used to enable/disable overdraw debugging. The accepted values are
     74  * "true" and "false". The default value is "false".
     75  */
     76 #define PROPERTY_DEBUG_OVERDRAW "debug.hwui.show_overdraw"
     77 
     78 /**
     79  * Used to enable/disable non-rectangular clipping debugging.
     80  *
     81  * The accepted values are:
     82  * "highlight", drawing commands clipped by the stencil will
     83  *              be colored differently
     84  * "region", renders the clipping region on screen whenever
     85  *           the stencil is set
     86  * "hide", don't show the clip
     87  *
     88  * The default value is "hide".
     89  */
     90 #define PROPERTY_DEBUG_STENCIL_CLIP "debug.hwui.show_non_rect_clip"
     91 
     92 /**
     93  * Disables draw operation deferral if set to "true", forcing draw
     94  * commands to be issued to OpenGL in order, and processed in sequence
     95  * with state-manipulation canvas commands.
     96  */
     97 #define PROPERTY_DISABLE_DRAW_DEFER "debug.hwui.disable_draw_defer"
     98 
     99 /**
    100  * Used to disable draw operation reordering when deferring draw operations
    101  * Has no effect if PROPERTY_DISABLE_DRAW_DEFER is set to "true"
    102  */
    103 #define PROPERTY_DISABLE_DRAW_REORDER "debug.hwui.disable_draw_reorder"
    104 
    105 ///////////////////////////////////////////////////////////////////////////////
    106 // Runtime configuration properties
    107 ///////////////////////////////////////////////////////////////////////////////
    108 
    109 /**
    110  * Used to enable/disable scissor optimization. The accepted values are
    111  * "true" and "false". The default value is "false".
    112  *
    113  * When scissor optimization is enabled, OpenGLRenderer will attempt to
    114  * minimize the use of scissor by selectively enabling and disabling the
    115  * GL scissor test.
    116  * When the optimization is disabled, OpenGLRenderer will keep the GL
    117  * scissor test enabled and change the scissor rect as needed.
    118  * Some GPUs (for instance the SGX 540) perform better when changing
    119  * the scissor rect often than when enabling/disabling the scissor test
    120  * often.
    121  */
    122 #define PROPERTY_DISABLE_SCISSOR_OPTIMIZATION "ro.hwui.disable_scissor_opt"
    123 
    124 /**
    125  * Indicates whether PBOs can be used to back pixel buffers.
    126  * Accepted values are "true" and "false".
    127  */
    128 #define PROPERTY_ENABLE_GPU_PIXEL_BUFFERS "hwui.use_gpu_pixel_buffers"
    129 
    130 // These properties are defined in mega-bytes
    131 #define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size"
    132 #define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size"
    133 #define PROPERTY_RENDER_BUFFER_CACHE_SIZE "ro.hwui.r_buffer_cache_size"
    134 #define PROPERTY_GRADIENT_CACHE_SIZE "ro.hwui.gradient_cache_size"
    135 #define PROPERTY_PATH_CACHE_SIZE "ro.hwui.path_cache_size"
    136 #define PROPERTY_DROP_SHADOW_CACHE_SIZE "ro.hwui.drop_shadow_cache_size"
    137 #define PROPERTY_FBO_CACHE_SIZE "ro.hwui.fbo_cache_size"
    138 
    139 // These properties are defined in percentage (range 0..1)
    140 #define PROPERTY_TEXTURE_CACHE_FLUSH_RATE "ro.hwui.texture_cache_flushrate"
    141 
    142 // These properties are defined in pixels
    143 #define PROPERTY_TEXT_SMALL_CACHE_WIDTH "ro.hwui.text_small_cache_width"
    144 #define PROPERTY_TEXT_SMALL_CACHE_HEIGHT "ro.hwui.text_small_cache_height"
    145 #define PROPERTY_TEXT_LARGE_CACHE_WIDTH "ro.hwui.text_large_cache_width"
    146 #define PROPERTY_TEXT_LARGE_CACHE_HEIGHT "ro.hwui.text_large_cache_height"
    147 
    148 // Indicates whether gamma correction should be applied in the shaders
    149 // or in lookup tables. Accepted values:
    150 //
    151 //     - "lookup3", correction based on lookup tables. Gamma correction
    152 //        is different for black and white text (see thresholds below)
    153 //
    154 //     - "lookup", correction based on a single lookup table
    155 //
    156 //     - "shader3", correction applied by a GLSL shader. Gamma correction
    157 //        is different for black and white text (see thresholds below)
    158 //
    159 //     - "shader", correction applied by a GLSL shader
    160 //
    161 // See PROPERTY_TEXT_GAMMA, PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD and
    162 // PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD for more control.
    163 #define PROPERTY_TEXT_GAMMA_METHOD "hwui.text_gamma_correction"
    164 #define DEFAULT_TEXT_GAMMA_METHOD "lookup"
    165 
    166 // Gamma (>= 1.0, <= 10.0)
    167 #define PROPERTY_TEXT_GAMMA "hwui.text_gamma"
    168 // Luminance threshold below which black gamma correction is applied. Range: [0..255]
    169 #define PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD "hwui.text_gamma.black_threshold"
    170 // Lumincance threshold above which white gamma correction is applied. Range: [0..255]
    171 #define PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD "hwui.text_gamma.white_threshold"
    172 
    173 ///////////////////////////////////////////////////////////////////////////////
    174 // Default property values
    175 ///////////////////////////////////////////////////////////////////////////////
    176 
    177 #define DEFAULT_TEXTURE_CACHE_SIZE 24.0f
    178 #define DEFAULT_LAYER_CACHE_SIZE 16.0f
    179 #define DEFAULT_RENDER_BUFFER_CACHE_SIZE 2.0f
    180 #define DEFAULT_PATH_CACHE_SIZE 10.0f
    181 #define DEFAULT_PATCH_CACHE_SIZE 512
    182 #define DEFAULT_GRADIENT_CACHE_SIZE 0.5f
    183 #define DEFAULT_DROP_SHADOW_CACHE_SIZE 2.0f
    184 #define DEFAULT_FBO_CACHE_SIZE 16
    185 
    186 #define DEFAULT_TEXTURE_CACHE_FLUSH_RATE 0.6f
    187 
    188 #define DEFAULT_TEXT_GAMMA 1.4f
    189 #define DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD 64
    190 #define DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD 192
    191 
    192 ///////////////////////////////////////////////////////////////////////////////
    193 // Misc
    194 ///////////////////////////////////////////////////////////////////////////////
    195 
    196 // Converts a number of mega-bytes into bytes
    197 #define MB(s) s * 1024 * 1024
    198 
    199 static DebugLevel readDebugLevel() {
    200     char property[PROPERTY_VALUE_MAX];
    201     if (property_get(PROPERTY_DEBUG, property, NULL) > 0) {
    202         return (DebugLevel) atoi(property);
    203     }
    204     return kDebugDisabled;
    205 }
    206 
    207 #endif // ANDROID_HWUI_PROPERTIES_H
    208