libs/hwui/Properties.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_HWUI_PROPERTIES_H
#define ANDROID_HWUI_PROPERTIES_H

#include <cutils/properties.h>

/**
 * This file contains the list of system properties used to configure libhwui.
 */

namespace android {
namespace uirenderer {

///////////////////////////////////////////////////////////////////////////////
// Compile-time properties
///////////////////////////////////////////////////////////////////////////////

// Textures used by layers must have dimensions multiples of this number
#define LAYER_SIZE 64

// Defines the size in bits of the stencil buffer for the framebuffer
// Note: Only 1 bit is required for clipping but more bits are required
// to properly implement overdraw debugging
#define STENCIL_BUFFER_SIZE 8

///////////////////////////////////////////////////////////////////////////////
// Debug properties
///////////////////////////////////////////////////////////////////////////////

/**
 * Debug level for app developers. The value is a numeric value defined
 * by the DebugLevel enum below.
 */
#define PROPERTY_DEBUG "debug.hwui.level"

/**
 * Debug levels. Debug levels are used as flags.
 */
enum DebugLevel {
    kDebugDisabled = 0,
    kDebugMemory = 1,
    kDebugCaches = 2,
    kDebugMoreCaches = kDebugMemory | kDebugCaches
};

/**
 * Used to enable/disable layers update debugging. The accepted values are
 * "true" and "false". The default value is "false".
 */
#define PROPERTY_DEBUG_LAYERS_UPDATES "debug.hwui.show_layers_updates"

/**
 * Used to enable/disable overdraw debugging.
 *
 * The accepted values are
 * "show", to show overdraw
 * "show_deuteranomaly", to show overdraw if you suffer from Deuteranomaly
 * "count", to show an overdraw counter
 * "false", to disable overdraw debugging
 *
 * The default value is "false".
 */
#define PROPERTY_DEBUG_OVERDRAW "debug.hwui.overdraw"

/**
 *  System property used to enable or disable hardware rendering profiling.
 * The default value of this property is assumed to be false.
 *
 * When profiling is enabled, the adb shell dumpsys gfxinfo command will
 * output extra information about the time taken to execute by the last
 * frames.
 *
 * Possible values:
 * "true", to enable profiling
 * "visual_bars", to enable profiling and visualize the results on screen
 * "false", to disable profiling
 */
#define PROPERTY_PROFILE "debug.hwui.profile"
#define PROPERTY_PROFILE_VISUALIZE_BARS "visual_bars"

/**
 * Used to enable/disable non-rectangular clipping debugging.
 *
 * The accepted values are:
 * "highlight", drawing commands clipped by the stencil will
 *              be colored differently
 * "region", renders the clipping region on screen whenever
 *           the stencil is set
 * "hide", don't show the clip
 *
 * The default value is "hide".
 */
#define PROPERTY_DEBUG_STENCIL_CLIP "debug.hwui.show_non_rect_clip"

/**
 * Turn on to draw dirty regions every other frame.
 *
 * Possible values:
 * "true", to enable dirty regions debugging
 * "false", to disable dirty regions debugging
 */
#define PROPERTY_DEBUG_SHOW_DIRTY_REGIONS "debug.hwui.show_dirty_regions"

/**
 * Disables draw operation deferral if set to "true", forcing draw
 * commands to be issued to OpenGL in order, and processed in sequence
 * with state-manipulation canvas commands.
 */
#define PROPERTY_DISABLE_DRAW_DEFER "debug.hwui.disable_draw_defer"

/**
 * Used to disable draw operation reordering when deferring draw operations
 * Has no effect if PROPERTY_DISABLE_DRAW_DEFER is set to "true"
 */
#define PROPERTY_DISABLE_DRAW_REORDER "debug.hwui.disable_draw_reorder"

/**
 * Setting this property will enable or disable the dropping of frames with
 * empty damage. Default is "true".
 */
#define PROPERTY_SKIP_EMPTY_DAMAGE "debug.hwui.skip_empty_damage"

/**
 * Controls whether or not HWUI will use the EGL_EXT_buffer_age extension
 * to do partial invalidates. Setting this to "false" will fall back to
 * using BUFFER_PRESERVED instead
 * Default is "true"
 */
#define PROPERTY_USE_BUFFER_AGE "debug.hwui.use_buffer_age"

/**
 * Setting this to "false" will force HWUI to always do full-redraws of the surface.
 * This will disable the use of EGL_EXT_buffer_age and BUFFER_PRESERVED.
 * Default is "true"
 */
#define PROPERTY_ENABLE_PARTIAL_UPDATES "debug.hwui.use_partial_updates"

#define PROPERTY_FILTER_TEST_OVERHEAD "debug.hwui.filter_test_overhead"

/**
 * Indicates whether PBOs can be used to back pixel buffers.
 * Accepted values are "true" and "false". Default is true.
 */
#define PROPERTY_ENABLE_GPU_PIXEL_BUFFERS "debug.hwui.use_gpu_pixel_buffers"

/**
 * Allows to set rendering pipeline mode to OpenGL (default), Skia OpenGL
 * or Vulkan.
 */
#define PROPERTY_RENDERER "debug.hwui.renderer"

///////////////////////////////////////////////////////////////////////////////
// Misc
///////////////////////////////////////////////////////////////////////////////

// Converts a number of mega-bytes into bytes
#define MB(s) ((s) * 1024 * 1024)
// Converts a number of kilo-bytes into bytes
#define KB(s) ((s) * 1024)

enum class ProfileType {
    None,
    Console,
    Bars
};

enum class OverdrawColorSet {
    Default = 0,
    Deuteranomaly
};

enum class StencilClipDebug {
    Hide,
    ShowHighlight,
    ShowRegion
};

enum class RenderPipelineType {
    OpenGL = 0,
    SkiaGL,
    SkiaVulkan,
    NotInitialized = 128
};

/**
 * Renderthread-only singleton which manages several static rendering properties. Most of these
 * are driven by system properties which are queried once at initialization, and again if init()
 * is called.
 */
class Properties {
public:
    static bool load();

    static bool drawDeferDisabled;
    static bool drawReorderDisabled;
    static bool debugLayersUpdates;
    static bool debugOverdraw;
    static bool showDirtyRegions;
    // TODO: Remove after stabilization period
    static bool skipEmptyFrames;
    static bool useBufferAge;
    static bool enablePartialUpdates;

    // TODO: Move somewhere else?
    static constexpr float textGamma = 1.45f;

    static DebugLevel debugLevel;
    static OverdrawColorSet overdrawColorSet;
    static StencilClipDebug debugStencilClip;

    // Override the value for a subset of properties in this class
    static void overrideProperty(const char* name, const char* value);

    static float overrideLightRadius;
    static float overrideLightPosY;
    static float overrideLightPosZ;
    static float overrideAmbientRatio;
    static int overrideAmbientShadowStrength;
    static int overrideSpotShadowStrength;

    static ProfileType getProfileType();
    static RenderPipelineType getRenderPipelineType();
    static bool isSkiaEnabled();

    // Should be used only by test apps
    static bool waitForGpuCompletion;
    static bool forceDrawFrame;

    // Should only be set by automated tests to try and filter out
    // any overhead they add
    static bool filterOutTestOverhead;

    // Workaround a device lockup in edge cases by switching to async mode
    // instead of the default vsync (b/38372997). Only system_server should hit this.
    // Any existing RenderProxy & Surface combination will be unaffected, only things
    // created after changing this.
    static bool disableVsync;

    // Used for testing only to change the render pipeline.
#ifdef HWUI_GLES_WRAP_ENABLED
    static void overrideRenderPipelineType(RenderPipelineType);
#endif

private:
    static ProfileType sProfileType;
    static bool sDisableProfileBars;
    static RenderPipelineType sRenderPipelineType;
}; // class Caches

}; // namespace uirenderer
}; // namespace android

#endif // ANDROID_HWUI_PROPERTIES_H