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标题: 下面在新的横屏基础上，进行复制buffer [打印本页]

作者: zangcf 时间: 2016-4-29 19:43
标题: 下面在新的横屏基础上，进行复制buffer
下面在新的横屏基础上，进行复制buffer

作者: zangcf 时间: 2016-4-29 20:01
第一步，修改buffer的大小为高度1920：
/media/doraemon/express/alps_ok/frameworks/native/libs/ui/GraphicBufferAllocator.cpp

status_t GraphicBufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
      int usage, buffer_handle_t* handle, int32_t* stride)
{
ATRACE_CALL();
// make sure to not allocate a N x 0 or 0 x N buffer, since this is
// allowed from an API stand-point allocate a 1x1 buffer instead.
if (!w || !h)
      w = h = 1;

// we have a h/w allocator and h/w buffer is requested
status_t err;
//ALOGD("zcfdebug [GraphicBufferAllocator::alloc] the h is : %d", h); //zcfdebug++
//ALOGD("zcfdebug [GraphicBufferAllocator::alloc] the w is : %d", w); //zcfdebug++
if(h>=1 && h<=1920)h=1920; //zcfdebug++
err = mAllocDev->alloc(mAllocDev, w, h, format, usage, handle, stride);

ALOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
         w, h, format, usage, err, strerror(-err));

if (err == NO_ERROR) {
      Mutex::Autolock _l(sLock);
      KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
      int bpp = bytesPerPixel(format);
      if (bpp < 0) {
         // probably a HAL custom format. in any case, we don't know
         // what its pixel size is.
         bpp = 0;
      }
      alloc_rec_t rec;
      rec.w = w;
      rec.h = h;
      rec.s = *stride;
      rec.format = format;
      rec.usage = usage;
      rec.size = h * stride[0] * bpp;
      list.add(*handle, rec);
}

#ifdef MTK_AOSP_ENHANCEMENT
// dump call stack here after handle value got
if (true == mIsDumpCallStack) {
      ALOGD("[GraphicBufferAllocator::alloc] handle:%p", *handle);
      CallStack stack(" ");
}
#endif

return err;
}

作者: zangcf 时间: 2016-4-29 20:25
先写复制函数，然后看看是那个地方影响了视频投射口的。
/media/doraemon/express/alps_ok/frameworks/native/services/surfaceflinger/Layer.cpp

//zcfdebug++<<
ALOGE("zcfdebug1 mActiveBuffer->stride is %d", mActiveBuffer->stride);
ALOGE("zcfdebug1 mActiveBuffer->height is %d", mActiveBuffer->height);

      if (mActiveBuffer != NULL) {
if(mActiveBuffer!=NULL && mActiveBuffer->height==960){
      uint8_t* img = NULL;
ALOGE("zcfdebug1 here run buf!=NULL && buf->height==960");
      mActiveBuffer->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&img));
memcpy(img+mActiveBuffer->height*mActiveBuffer->stride*4,img,mActiveBuffer->stride * mActiveBuffer->height*4);
      mActiveBuffer->unlock();
}

if(mActiveBuffer!=NULL && mActiveBuffer->height==950){
      uint8_t* img = NULL;
ALOGE("zcfdebug1 here run buf!=NULL && buf->height==950");
      mActiveBuffer->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&img));
memcpy(img+(mActiveBuffer->height+20)*mActiveBuffer->stride*4,img,mActiveBuffer->stride * (mActiveBuffer->height-10)*4);
      mActiveBuffer->unlock();
}

      }
//zcfdebug>>++

作者: zangcf 时间: 2016-4-29 20:30
下面看看是那个程序影响投射口了？
第一，/media/doraemon/express/alps_ok/frameworks/native/libs/gui/Surface.cpp文件
暂时看和这个文件没有关系。

作者: zangcf 时间: 2016-4-29 20:37
下面看看这个文件中的修改：
/media/doraemon/express/alps_ok/frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.cpp
暂时和这个没有关系

作者: zangcf 时间: 2016-4-29 20:41
看看/media/doraemon/express/alps_ok/frameworks/native/services/surfaceflinger/SurfaceFlinger.cpp中的修改：
好像也与这个地方无关

作者: zangcf 时间: 2016-4-29 20:51
下面看看Layer：/media/doraemon/express/alps_ok/frameworks/native/services/surfaceflinger/Layer.cpp部分的修改
修改之后，就会导致无法开机了。

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