本文整理汇总了C++中ossimRefPtr::initialize方法的典型用法代码示例。如果您正苦于以下问题：C++ ossimRefPtr::initialize方法的具体用法？C++ ossimRefPtr::initialize怎么用？C++ ossimRefPtr::initialize使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ossimRefPtr的用法示例。
在下文中一共展示了ossimRefPtr::initialize方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: decodeJpeg
bool ossimCodecFactory::decodeJpeg( const std::vector<ossim_uint8>& in,
ossimRefPtr<ossimImageData>& out ) const
{
bool result = false;
// Note: This is public and can be called directly; hence, the signature check
// Check for jpeg signature:
if ( in.size() > 3 )
{
if ( (in[0] == 0xff) &&
(in[1] == 0xd8) &&
(in[2] == 0xff) &&
(in[3] == 0xe0) )
{
/* This struct contains the JPEG decompression parameters and pointers
* to working space (which is allocated as needed by the JPEG library).
*/
jpeg_decompress_struct cinfo;
/* We use our private extension JPEG error handler.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
ossimJpegErrorMgr jerr;
/* Step 1: allocate and initialize JPEG decompression object */
/* We set up the normal JPEG error routines, then override error_exit. */
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = ossimJpegErrorExit;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp(jerr.setjmp_buffer) == 0)
{
result = true;
/* Now we can initialize the JPEG decompression object. */
jpeg_CreateDecompress(&cinfo, JPEG_LIB_VERSION, sizeof(cinfo));
//---
// Step 2: specify data source. In this case we will uncompress from
// memory so we will use "ossimJpegMemorySrc" in place of " jpeg_stdio_src".
//---
ossimJpegMemorySrc ( &cinfo,
&(in.front()),
(size_t)(in.size()) );
/* Step 3: read file parameters with jpeg_read_header() */
jpeg_read_header(&cinfo, TRUE);
/* Step 4: set parameters for decompression */
/* In this example, we don't need to change any of the defaults set by
* jpeg_read_header(), so we do nothing here.
*/
/* Step 5: Start decompressor */
jpeg_start_decompress(&cinfo);
#if 0 /* Please leave for debug. (drb) */
if ( traceDebug() )
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "jpeg cinfo.output_width: " << cinfo.output_width
<< "\njpeg cinfo.output_height: " << cinfo.output_height
<< "\n";
}
#endif
const ossim_uint32 SAMPLES = cinfo.output_width;
const ossim_uint32 LINES = cinfo.output_height;
const ossim_uint32 BANDS = cinfo.output_components;
if ( out.valid() )
{
// This will resize tile if not correct.
out->setImageRectangleAndBands(
ossimIrect(0,0,(ossim_int32)SAMPLES-1,(ossim_int32)LINES-1), BANDS );
}
else
{
out = new ossimU8ImageData( 0, BANDS, SAMPLES, LINES );
out->initialize();
}
// Get pointers to the cache tile buffers.
std::vector<ossim_uint8*> destinationBuffer(BANDS);
for (ossim_uint32 band = 0; band < BANDS; ++band)
{
destinationBuffer[band] = out->getUcharBuf(band);
}
std::vector<ossim_uint8> lineBuffer(SAMPLES * cinfo.output_components);
JSAMPROW jbuf[1];
jbuf[0] = (JSAMPROW) &(lineBuffer.front());
while (cinfo.output_scanline < LINES)
{
// Read a line from the jpeg file.
//.........这里部分代码省略.........