OpenHarmony dump渲染和合成图层SurfaceBuffer指南

引言

  博客停更很久了，提起笔来渐感生疏啊！看来，还是得抽出时间来更新更新啊！好了，感慨也发完了，是时候切入正题了。本篇博客主要以本人在实际项目的开发中，为了定位OpenHarmony显示异常究竟是GPU渲染,合成的问题，还是DC端送显异常的问题而来。这里为了后续的复盘，也为可能有共同需求的朋友所以记录下来，最终发展成为如何dump OpenHarmony渲染和合成图层SurfaceBuffer为png图片。(主要是教大家如何把锅甩给队友)！通过本篇博客，读者将会至少学会如下两点:

• 通过dump OpenHarmony渲染图层SurfaceBuffer，查看OpenHarmony渲染结果是否正确
• 通过dump OpenHarmony合成图层SurfaceBuffer，查看OpenHarmony合成结果是否正确

  这里需要注意一点的是，这里的合成指的是GPU(Client)的合成方式！

好了不多说了，直接开干！

能搜寻到这篇博客的，肯定是对OpenHarmony SurfaceBuffer有一定掌握的朋友，所以这里就不会过多解释一些名词和代码逻辑了。总之这是一篇专业性比较强的文章(因为一般的朋友也不会搜这个)！

注意:本篇的介绍是基于OpenHarmony 3.2 release平台为基础的，其中涉及的代码路径如下：

foundation/graphic/graphic_2d/rosen/modules/render_service/core/pipeline/rs_render_service_visitor.cpp
foundation/graphic/graphic_2d/rosen/modules/composer/hdi_backend/src/hdi_backend.cpp

---

一.自定义逻辑dump OpenHarmony渲染和合成图层SurfaceBuffer指南

由于此篇博客是实战类型的，所以也就不必对小伙伴们吆喝什么的了，这里没有九块九包邮，也没有九块九上车。有的只有是兄弟就砍一刀。

1.1 dump OpenHarmony渲染图层SurfaceBuffer

我们知道OpenHarmony中各个渲染图层是以RSSurfaceRenderNode存在的，所以我们只需要将RSSurfaceRenderNode对应的SurfaceBuffer保存成png图片即可。这里我们直接上我封装好的逻辑代码:

//头文件
#ifndef HDI_BACKEND_UTIL_H
#define HDI_BACKEND_UTIL_H


#include <vector>
#include <iostream>
#include <string>
#include "surface_buffer.h"
#include <unordered_map>
#include <refbase.h>
#include <parameter.h>
#include <parameters.h>
#include "pipeline/rs_surface_render_node.h"
namespace OHOS {
namespace Rosen {

using WriteToPngParam = struct {
    uint32_t width;
    uint32_t height;
    uint32_t stride;
    uint32_t bitDepth;
    const uint8_t *data;
};


class RSBaseRenderUtil {
public:
    static const int ALLSURFACES = 2;
    static bool WriteHdiOutToPng(const sptr<SurfaceBuffer> &buffer, const BufferHandle *bufferHandle);
    static bool WriteSurfaceBufferToPng(const sptr<SurfaceBuffer> &buffer);
    static bool WriteSurfaceRenderNodeToPng(const RSSurfaceRenderNode& node);

private:
    static bool WriteToPng(const std::string &filename, const WriteToPngParam &param);
    
};


} // namespace Rosen
} // namespace OHOS

#endif // HDI_BACKEND_UTIL_H





//具体实现
#include "hdi_backend_util.h"
#include "png.h"
#include "hdi_log.h"
#include <sys/time.h>


namespace OHOS {
namespace Rosen {

bool RSBaseRenderUtil::WriteToPng(const std::string &filename, const WriteToPngParam &param)
{
    HLOGI("RSBaseRenderUtil::WriteToPng filename = %s{public}", filename.c_str());
    png_structp pngStruct = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
    if (pngStruct == nullptr) {
        return false;
    }
    png_infop pngInfo = png_create_info_struct(pngStruct);
    if (pngInfo == nullptr) {
        png_destroy_write_struct(&pngStruct, nullptr);
        return false;
    }

    FILE *fp = fopen(filename.c_str(), "wb");
    if (fp == nullptr) {
        png_destroy_write_struct(&pngStruct, &pngInfo);
        return false;
    }
    png_init_io(pngStruct, fp);

    // set png header
    png_set_IHDR(pngStruct, pngInfo,
        param.width, param.height,
        param.bitDepth,
        PNG_COLOR_TYPE_RGBA,
        PNG_INTERLACE_NONE,
        PNG_COMPRESSION_TYPE_BASE,
        PNG_FILTER_TYPE_BASE);
    png_set_packing(pngStruct); // set packing info
    png_write_info(pngStruct, pngInfo); // write to header

    for (uint32_t i = 0; i < param.height; i++) {
        png_write_row(pngStruct, param.data + (i * param.stride));
    }
    png_write_end(pngStruct, pngInfo);

    // free
    png_destroy_write_struct(&pngStruct, &pngInfo);
    int ret = fclose(fp);
    return ret == 0;
}


bool RSBaseRenderUtil::WriteHdiOutToPng(const sptr<SurfaceBuffer> &buffer, const BufferHandle *bufferHandle)
{
    if((std::atoi((system::GetParameter("rosen.dump.surfacebuffer", "0")).c_str()) == ALLSURFACES) )
    {
        HLOGE("allow WriteHdiOutToPng");
        {
            if (bufferHandle == nullptr) {
                return false;
            }
            struct timeval now;
            gettimeofday(&now, nullptr);
            constexpr int secToUsec = 1000 * 1000;
            int64_t nowVal =  static_cast<int64_t>(now.tv_sec) * secToUsec + static_cast<int64_t>(now.tv_usec);
            std::string filename = "/data/hdioutput/hdi_output_layer_" +
                std::to_string(nowVal) + ".png";

            WriteToPngParam param;
            param.width = static_cast<uint32_t>(bufferHandle->width);
            param.height = static_cast<uint32_t>(bufferHandle->height);
            param.data = (uint8_t*)(buffer->GetVirAddr());
            param.stride = static_cast<uint32_t>(bufferHandle->stride);
            param.bitDepth = 8;
            
            WriteToPng(filename, param);
            
        }
    }
    return false;
}


bool RSBaseRenderUtil::WriteSurfaceBufferToPng(const sptr<SurfaceBuffer> &buffer)
{
    if((std::atoi((system::GetParameter("rosen.dump.surfacebuffer", "0")).c_str()) == ALLSURFACES) )
    {
        HLOGE("allow WriteHdiOutToPng");
        {
            BufferHandle *bufferHandle = buffer->GetBufferHandle();
            if (bufferHandle == nullptr) {
                return false;
            }
            struct timeval now;
            gettimeofday(&now, nullptr);
            constexpr int secToUsec = 1000 * 1000;
            int64_t nowVal =  static_cast<int64_t>(now.tv_sec) * secToUsec + static_cast<int64_t>(now.tv_usec);
            std::string filename = "/data/hdioutput/hdi_output_layer_" +
                std::to_string(nowVal) + ".png";

            WriteToPngParam param;
            param.width = static_cast<uint32_t>(bufferHandle->width);
            param.height = static_cast<uint32_t>(bufferHandle->height);
            param.data = (uint8_t*)(buffer->GetVirAddr());
            param.stride = static_cast<uint32_t>(bufferHandle->stride);
            param.bitDepth = 8;
            
            WriteToPng(filename, param);
            
        }
    }
    return false;
}


bool RSBaseRenderUtil::WriteSurfaceRenderNodeToPng(const RSSurfaceRenderNode& node)
{
    if((std::atoi((system::GetParameter("rosen.dump.rendernode", "0")).c_str()) == ALLSURFACES))
    {
        sptr<SurfaceBuffer> buffer = node.GetBuffer();
        if (buffer == nullptr) {
            return false;
        }
        BufferHandle *bufferHandle =  buffer->GetBufferHandle();
        if (bufferHandle == nullptr) {
            return false;
        }

        struct timeval now;
        gettimeofday(&now, nullptr);
        constexpr int secToUsec = 1000 * 1000;
        int64_t nowVal =  static_cast<int64_t>(now.tv_sec) * secToUsec + static_cast<int64_t>(now.tv_usec);
        std::string filename = "/data/SurfaceRenderNode_" +
            node.GetName() + "_"  +
            std::to_string(node.GetId()) + "_" +
            std::to_string(nowVal) + ".png";

        WriteToPngParam param;
        param.width = static_cast<uint32_t>(bufferHandle->width);
        param.height = static_cast<uint32_t>(bufferHandle->height);
        param.data = (uint8_t*)(buffer->GetVirAddr());
        param.stride = static_cast<uint32_t>(bufferHandle->stride);
        param.bitDepth = 8;

        return WriteToPng(filename, param);      
    }

    return false;
}

}// namespace Rosen
} // namespace OHOS

接下来我们要做的就是在OpenHarmony的处理逻辑中，调用什么的源码进行dump，具体操作步骤如下:

• 在rs_render_service_visitor.cpp中引入上述头文件，并且在下面引入dump

  //foundation/graphic/graphic_2d/rosen/modules/render_service/core/pipeline/rs_render_service_visitor.cpp
  void RSRenderServiceVisitor::ProcessSurfaceRenderNode(RSSurfaceRenderNode& node)
  {
  	...
  	//不一定要在这个地方，只需要是渲染后对对应的RSSurfaceRenderNode操作即可
      RSBaseRenderUtil::WriteSurfaceRenderNodeToPng(node);
      ...
  }
  

• 当我们想要dump时候，只需要将对应parma打开即可

  rosen.dump.rendernode
  

• 接着就可以在data目录下看到生成的png图片
  

1.2 dump OpenHarmony合成图层SurfaceBuffer

这块我们可以在hdi_backend.cpp的如下方法中添加相关的逻辑，如下:

int32_t HdiBackend::SetScreenClientInfo(const FrameBufferEntry &fbEntry, const OutputPtr &output)
{
	...
    RSBaseRenderUtil::WriteSurfaceBufferToPng(fbEntry.buffer);
    ...
}

这当然上述仅仅是提供了一种思路，具体的上述源码逻辑用在什么地方，读者可以根据自己的需要自行调整。这里我们简单测试一下，看看生成的dump文件如下:

---

二.OpenHarmony dump渲染和合成图层SurfaceBuffer指南小结和注意事项

到这里dump的相关逻辑就告一段落了，细心的朋友也许会发现dump渲染和合成的图层代码逻辑基本完全一致。是的，这是因为无论是渲染的图层还是合成之后的图层它们都是通过SurfaceBuffer来进行存储指向的。

其中，我们引用上述封装好的dump函数时候，我们在对应的BUILD.gn中必须，引入如下的库和头文件，如下

  deps = [
   "//foundation/graphic/graphic_2d:libsurface",
	"//foundation/graphic/graphic_2d/rosen/modules/render_service_base:librender_service_base",
  ]

  public_deps = [
    "//foundation/graphic/graphic_2d/utils:buffer_handle",
    "//third_party/libpng:libpng",
  ]
  external_deps = [ "init:libbegetutil" ]
  include_dirs = [
    "//drivers/peripheral/display/interfaces/include",
    "//third_party/libpng",
  ]

这里我们简单总结下dump OpenHarmony中各种图层SurfaceBuffer内容的思路:

• 首先要获取各种图层所指向的GraphicBuffer
• 获取GraphicBuffer的存储地址(通常是通过内存映射过来的)
• 然后将获取到的地址中的内容，以一定的格式进行存储，通常是GRB888格式(也可以进行相关的封装)

这里重点补充一下，关于dump SurfaceBuffer获取的信息大小，格式,以及存储计算规则是否正确可以通过hidumper -s RenderService -a allInfo 进行查看，如下:

# hidumper  -s RenderService

-------------------------------[ability]-------------------------------


----------------------------------RenderService---------------------------------
------Graphic2D--RenderSerice ------
Usage:
 h                             |help text for the tool
screen                         |dump all screen infomation in the system
surface                        |dump all surface information
composer fps                   |dump the fps info of composer
[surface name] fps             |dump the fps info of surface
composer fpsClear                   |clear the fps info of composer
[surface name] fpsClear             |clear the fps info of surface
nodeNotOnTree                  |dump nodeNotOnTree info
allSurfacesMem                 |dump surface mem info
RSTree                         |dump RSTree info
EventParamList                 |dump EventParamList info
allInfo                        |dump all info


# hidumper  -s RenderService -a allInfo                                        


-------------------------------[ability]-------------------------------


----------------------------------RenderService---------------------------------
-- ScreenInfo
screen[0]: id=2, powerstatus=POWER_STATUS_ON, backlight=-1, screenType=EXTERNAL_TYPE
  supportedMode[0]: 720x400, refreshrate=70
  supportedMode[1]: 640x480, refreshrate=60
  supportedMode[2]: 640x480, refreshrate=75
  supportedMode[3]: 800x600, refreshrate=60
  supportedMode[4]: 800x600, refreshrate=75
  supportedMode[5]: 1024x768, refreshrate=60
  supportedMode[6]: 1152x864, refreshrate=75
  supportedMode[7]: 1280x1024, refreshrate=60
  supportedMode[8]: 1280x1024, refreshrate=75
  supportedMode[9]: 1920x1080, refreshrate=60
  activeMode: 1920x1080, refreshrate=60
  capability: name=Unknown, phywidth=530, phyheight=300,supportlayers=0, virtualDispCount=0, propCount=0, type=INVILID_DISP_INTF, supportWriteBack=false

-- LayerInfo

 surface [ScreenLockWindow] NodeId[2954937499653] LayerId[2]://锁屏界面
 zOrder = 0, visibleNum = 1, transformType = 0 <no rotation>, compositionType = 0 <client composistion>, blendType = 3 <SRC_OVER blending>, layerAlpha = [enGlobalAlpha(1), enPixelAlpha(0), alpha0(0), alpha1(0), gAlpha(255)].
 layerRect = [0, 0, 1920, 1080], visibleRegion = [0, 0, 1920, 1080], dirtyRegion = [0, 0, 1920, 1080], cropRect = [0, 0, 1920, 1080].
    BufferQueue:
      default-size = [1920x1080], FIFO = 3, name = ScreenLockWindow, uniqueId = 2954937499653, usedBufferListLen = 3, freeBufferListLen = 2, dirtyBufferListLen = 0, totalBuffersMemSize = 24300.00(KiB).
      bufferQueueCache:
        sequence = 8, state = 0 <released>, timestamp = 780011576923, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 9, state = 0 <released>, timestamp = 840016378613, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 13, state = 3 <acquired>, timestamp = 900011540119, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).

FrameBufferSurface
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = FrameBuffer, uniqueId = 2954937499648, usedBufferListLen = 2, freeBufferListLen = 1, dirtyBufferListLen = 0, totalBuffersMemSize = 16200.00(KiB).
      bufferQueueCache:
        sequence = 2, state = 3 <acquired>, timestamp = 900046439, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 73, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 4, state = 0 <released>, timestamp = 840051447, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 73, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).

-- Node Not On Tree

 node Id[6597069766667]:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = SystemUi_BannerNotice, uniqueId = 2954937499659, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:

 node Id[6597069766666]:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = SystemUi_DropdownPanel, uniqueId = 2954937499658, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:

 node Id[6597069766658]:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = SystemUi_VolumePanel, uniqueId = 2954937499654, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:

 node Id[7146825580544]:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = imeWindow, uniqueId = 2954937499652, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:

 node Id[6962141986820]:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = RecentView, uniqueId = 2954937499651, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:

-- All Surfaces Memory Size
the memory size of all surfaces buffer is : 94680.00 KiB.
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = SystemUi_DropdownPanel, uniqueId = 2954937499658, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:
    BufferQueue:
      default-size = [1920x32], FIFO = 3, name = SystemUi_PrivacyIndicator, uniqueId = 2954937499657, usedBufferListLen = 3, freeBufferListLen = 1, dirtyBufferListLen = 0, totalBuffersMemSize = 720.00(KiB).
      bufferQueueCache:
        sequence = 12, state = 1 <requested>, timestamp = 40645170158, damageRect = [0, 0, 1920, 32], config = [1920x32, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 32, bufferMemSize = 240.00(KiB).
        sequence = 14, state = 3 <acquired>, timestamp = 40912469187, damageRect = [0, 0, 1920, 32], config = [1920x32, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 32, bufferMemSize = 240.00(KiB).
        sequence = 17, state = 0 <released>, timestamp = 40827680126, damageRect = [0, 0, 1920, 32], config = [1920x32, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 32, bufferMemSize = 240.00(KiB).
    BufferQueue:
      default-size = [1920x1080], FIFO = 3, name = EntryView, uniqueId = 2954937499650, usedBufferListLen = 3, freeBufferListLen = 2, dirtyBufferListLen = 0, totalBuffersMemSize = 24300.00(KiB).
      bufferQueueCache:
        sequence = 5, state = 0 <released>, timestamp = 31794906265, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 6, state = 0 <released>, timestamp = 32561536655, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 7, state = 3 <acquired>, timestamp = 32644867137, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
    BufferQueue:
      default-size = [1920x108], FIFO = 3, name = SystemUi_NavigationBar, uniqueId = 2954937499656, usedBufferListLen = 3, freeBufferListLen = 2, dirtyBufferListLen = 0, totalBuffersMemSize = 2430.00(KiB).
      bufferQueueCache:
        sequence = 11, state = 0 <released>, timestamp = 40827680126, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).
        sequence = 16, state = 0 <released>, timestamp = 40912469187, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).
        sequence = 19, state = 3 <acquired>, timestamp = 60012066524, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = SystemUi_VolumePanel, uniqueId = 2954937499654, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:
    BufferQueue:
      default-size = [1920x1080], FIFO = 3, name = ScreenLockWindow, uniqueId = 2954937499653, usedBufferListLen = 3, freeBufferListLen = 2, dirtyBufferListLen = 0, totalBuffersMemSize = 24300.00(KiB).
      bufferQueueCache:
        sequence = 8, state = 0 <released>, timestamp = 780011576923, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 9, state = 0 <released>, timestamp = 840016378613, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
        sequence = 13, state = 3 <acquired>, timestamp = 900011540119, damageRect = [0, 0, 1920, 1080], config = [1920x1080, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 1080, bufferMemSize = 8100.00(KiB).
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = imeWindow, uniqueId = 2954937499652, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:
    BufferQueue:
      default-size = [0x0], FIFO = 3, name = RecentView, uniqueId = 2954937499651, usedBufferListLen = 0, freeBufferListLen = 0, dirtyBufferListLen = 0, totalBuffersMemSize = 0.00(KiB).
      bufferQueueCache:
    BufferQueue:
      default-size = [1920x108], FIFO = 3, name = SystemUi_StatusBar, uniqueId = 2954937499655, usedBufferListLen = 3, freeBufferListLen = 2, dirtyBufferListLen = 0, totalBuffersMemSize = 2430.00(KiB).
      bufferQueueCache:
        sequence = 10, state = 0 <released>, timestamp = 40827680126, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).
        sequence = 15, state = 3 <acquired>, timestamp = 60012066524, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).
        sequence = 18, state = 0 <released>, timestamp = 40912469187, damageRect = [0, 0, 1920, 108], config = [1920x108, 8, 12, 9, 3000], bufferWith = 1920, bufferHeight = 108, bufferMemSize = 810.00(KiB).

-- RenderServiceTreeDump: 
Animating Node: [];
| BASE_NODE[0], isOnTheTree: 1, children[2963527434241 ]
  | DISPLAY_NODE[2963527434241], isOnTheTree: 1, children[6597069766656 6597069766661 6597069766664 6597069766665 6962141986816 ]
    | SURFACE_NODE[6597069766656], isOnTheTree: 1, hasConsumer: 1, Name [ScreenLockWindow], parent [2963527434241], { Region Size 1: [0, 0, 1920, 1080] }, SurfaceBgAlpha[ 255 ], children[]
    | SURFACE_NODE[6597069766661], isOnTheTree: 1, hasConsumer: 1, Name [SystemUi_StatusBar], parent [2963527434241], { Region Size 0:  }, SurfaceBgAlpha[ 0 ], children[]
    | SURFACE_NODE[6597069766664], isOnTheTree: 1, hasConsumer: 1, Name [SystemUi_NavigationBar], parent [2963527434241], { Region Size 0:  }, SurfaceBgAlpha[ 0 ], children[]
    | SURFACE_NODE[6597069766665], isOnTheTree: 1, hasConsumer: 1, Name [SystemUi_PrivacyIndicator], parent [2963527434241], { Region Size 0:  }, SurfaceBgAlpha[ 0 ], children[]
    | SURFACE_NODE[6962141986816], isOnTheTree: 1, hasConsumer: 1, Name [EntryView], parent [2963527434241], { Region Size 0:  }, SurfaceBgAlpha[ 0 ], children[]

-- EventParamListDump: 
rosen.RsDFXEvent.RS_COMPOSITION_TIMEOUT.timeOutThresholdMs: 100
rosen.RsDFXEvent.RS_COMPOSITION_TIMEOUT.eventIntervalMs: 60000
-- QosDump: 
QOS is disabled

---

三.写在最后

至此OpenHarmony dump渲染和合成图层SurfaceBuffer指南整个就完成了，读者是感到意犹未尽呢，还是想说一句尼玛，瞎扯淡呢！
好了，OpenHarmony dump渲染和合成图层SurfaceBuffer指南就告一段落了，各位青山不改绿水长流，各位江湖见！当然各位读者的点赞和关注是我写作路上前进的最大动力了，如果有啥不对或者不爽的也可以踩一踩也无妨！你们的鼓励和批评是博主前进路上最大的动力。

各位读友，千万不要喷我，因为我这也是第一次深入到OpenHarmony显示这块的源码逻辑，为啥我深入到了这块，因为入职了一家原厂。所以我现在是菜鸟一杯，如果有对OpenHarmony graphic刚兴趣的朋友，也可以联系我，一起学习进步！