#include "FWTEveViewer.h"

Inheritance diagram for FWTEveViewer:

Public Member Functions
std::future< int >	CaptureAndSaveImage (const TString &file, int height=-1)

FWTGLViewer *	fwGlViewer ()

	FWTEveViewer (const char n="FWTEveViewer", const char t="")

FWTGLViewer *	SpawnFWTGLViewer ()

virtual	~FWTEveViewer ()

Static Public Member Functions
static bool	SaveJpg (const TString &file, UChar_t *xx, int ww, int hh)

static bool	SavePng (const TString &file, UChar_t *xx, int ww, int hh)

Private Member Functions
	FWTEveViewer (const FWTEveViewer &)

const FWTEveViewer &	operator= (const FWTEveViewer &)

void	spawn_image_thread ()

Private Attributes
std::condition_variable	m_cnd

FWTGLViewer *	m_fwGlViewer

int	m_hh

std::vector< unsigned char >	m_imgBuffer

std::mutex	m_moo

TString	m_name

std::promise< int >	m_prom

std::thread *	m_thr = 0

bool	m_thr_exit = false

int	m_ww

Detailed Description

Description: [one line class summary]

Usage: <usage>

Definition at line 37 of file FWTEveViewer.h.

Constructor & Destructor Documentation

FWTEveViewer::FWTEveViewer	(	const char *	n = `"FWTEveViewer"`,
		const char *	t = `""`
	)

Definition at line 41 of file FWTEveViewer.cc.

                                                        :
    TEveViewer(n, t),
    m_fwGlViewer(0)
 {}

FWTEveViewer::~FWTEveViewer ( )

virtual

Definition at line 51 of file FWTEveViewer.cc.

References m_cnd, m_moo, m_thr, and m_thr_exit.

 {
    m_thr->detach();
 
    {
       std::unique_lock<std::mutex> lk(m_moo);
 
       m_thr_exit = true;
       m_cnd.notify_one();
    }
 
    delete m_thr;
 }

FWTEveViewer::FWTEveViewer ( const FWTEveViewer & )

private

Member Function Documentation

std::future< int > FWTEveViewer::CaptureAndSaveImage	(	const TString &	file,
		int	height = `-1`
	)

Definition at line 136 of file FWTEveViewer.cc.

References mergeVDriftHistosByStation::file, m_cnd, m_fwGlViewer, m_hh, m_imgBuffer, m_moo, m_name, m_prom, m_thr, m_ww, FWTGLViewer::MakeFbo(), FWTGLViewer::MakeFboHeight(), and spawn_image_thread().

 {
    static const TString eh("FWTEveViewer::CaptureAndSaveImage");
 
    TGLFBO *fbo = 0;
    if (height == -1)
       fbo = m_fwGlViewer->MakeFbo();
    else
       fbo = m_fwGlViewer->MakeFboHeight(height);
 
    if (fbo == 0)
    {
       ::Error(eh, "Returned FBO is 0.");
       m_prom = std::promise<int>();
       m_prom.set_value(-1);
       return m_prom.get_future();
    }
 
    int ww, hh;
    if (fbo->fIsRescaled)
    {
       ww = TMath::Nint(fbo->fW * fbo->fWScale);
       hh = TMath::Nint(fbo->fH * fbo->fHScale);
    }
    else
    {
       ww = fbo->fW;
       hh = fbo->fH;
    }
 
    fbo->SetAsReadBuffer();
 
    size_t bufsize = 3 * ww * hh;
    if (bufsize != m_imgBuffer.size())
    {
       m_imgBuffer.resize(bufsize);
    }
 
    glPixelStorei(GL_PACK_ALIGNMENT, 1);
    glReadPixels(0, 0, ww, hh, GL_RGB, GL_UNSIGNED_BYTE, &m_imgBuffer[0]);
 
    if (m_thr == 0) spawn_image_thread();
 
    {
       std::unique_lock<std::mutex> lk(m_moo);
 
       m_prom = std::promise<int>();
       m_name = file;
       m_ww   = ww;
       m_hh   = hh;
 
       m_cnd.notify_one();
    }
 
    return m_prom.get_future();
 }

FWTGLViewer* FWTEveViewer::fwGlViewer ( )

inline

Definition at line 53 of file FWTEveViewer.h.

References m_fwGlViewer.

Referenced by FWEveView::fwViewerGL().

53 { return m_fwGlViewer; }

FWTEveViewer::m_fwGlViewer

FWTGLViewer * m_fwGlViewer

Definition: FWTEveViewer.h:68

const FWTEveViewer& FWTEveViewer::operator= ( const FWTEveViewer & )

private

bool FWTEveViewer::SaveJpg	(	const TString &	file,
		UChar_t *	xx,
		int	ww,
		int	hh
	)

static

Definition at line 281 of file FWTEveViewer.cc.

References i, j, tablePrinter::rows, and TRUE.

Referenced by spawn_image_thread().

 {
    struct   jpeg_compress_struct JpegInfo;
    struct   jpeg_error_mgr       Error;
 
    JpegInfo.err = jpeg_std_error(&Error);
 
    // Now we can initialize the JPEG compression object.
    jpeg_create_compress(&JpegInfo);
 
    FILE *fp = fopen(file, "w");
    jpeg_stdio_dest(&JpegInfo, fp);
 
    JpegInfo.image_width      = ww;
    JpegInfo.image_height     = hh;
    JpegInfo.input_components = 3;
    JpegInfo.in_color_space   = JCS_RGB;
 
    jpeg_set_defaults(&JpegInfo);
 
    JpegInfo.write_JFIF_header = TRUE;
 
    // Set the quality output
    // const int quality = 98;
    // jpeg_set_quality(&JpegInfo, quality, true); // bool force_baseline ????
 
    jpeg_start_compress(&JpegInfo, TRUE);
 
    std::vector<UChar_t*> rows(hh);
    {
       int j = hh - 1;
       for (int i = 0; i < hh; i++, j--) {
          rows[i] = xx + j * ww * 3;
       }
    }
 
    jpeg_write_scanlines(&JpegInfo, &rows[0], hh);
 
    // Step 6: Finish compression
    jpeg_finish_compress(&JpegInfo);
 
    // Step 7: release JPEG compression object
 
    // This is an important step since it will release a good deal of memory.
    jpeg_destroy_compress(&JpegInfo);
 
    return true;
 }

bool FWTEveViewer::SavePng	(	const TString &	file,
		UChar_t *	xx,
		int	ww,
		int	hh
	)

static

Definition at line 201 of file FWTEveViewer.cc.

References i, j, NULL, and tablePrinter::rows.

Referenced by spawn_image_thread().

 {
    png_structp     png_ptr;
    png_infop       info_ptr;
 
    /* Create and initialize the png_struct with the desired error handler
     * functions.  If you want to use the default stderr and longjump method,
     * you can supply NULL for the last three parameters.  We also check that
     * the library version is compatible with the one used at compile time,
     * in case we are using dynamically linked libraries.  REQUIRED.
     */
    png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, 0, 0);
    if (png_ptr == NULL) {
       printf("Error creating png write struct\n");
       return false;
    }
 
    // Allocate/initialize the image information data.      REQUIRED
    info_ptr = png_create_info_struct(png_ptr);
    if (info_ptr == NULL) {
       printf("Error creating png info struct\n");
       png_destroy_write_struct(&png_ptr, &info_ptr);
       return false;
    }
 
    /*// Set error handling.  REQUIRED if you aren't supplying your own
    //      error handling functions in the png_create_write_struct() call.
    if (setjmp(png_jmpbuf(png_ptr))) {
    // If we get here, we had a problem reading the file
    png_destroy_write_struct(&png_ptr, &info_ptr);
    ilSetError(IL_LIB_PNG_ERROR);
    return IL_FALSE;
    }*/
 
    FILE *fp = fopen(file, "w");
 
    png_init_io(png_ptr, fp);
 
 
    // Use PNG_INTERLACE_ADAM7 for interlacing
    png_set_IHDR(png_ptr, info_ptr, ww, hh, 8, PNG_COLOR_TYPE_RGB,
                 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
 
    /* Optional gamma chunk is strongly suggested if you have any guess
     * as to the correct gamma of the image.
     */
    // png_set_gAMA(png_ptr, info_ptr, gamma);
 
    // Optionally write comments into the image.
    // png_text text;
    // text.key  = "Generated by";
    // text.text = "Generated by cmsShow";
    // text.compression = PNG_TEXT_COMPRESSION_NONE;
    // png_set_text(png_ptr, info_ptr, &text, 1);
 
    // Write the file header information.  REQUIRED.
    png_write_info(png_ptr, info_ptr);
 
    std::vector<UChar_t*> rows(hh);
    {
       int j = hh - 1;
       for (int i = 0; i < hh; i++, j--) {
          rows[i] = xx + j * ww * 3;
       }
    }
 
    // Writes the image.
    png_write_image(png_ptr, &rows[0]);
 
    // It is REQUIRED to call this to finish writing the rest of the file
    png_write_end(png_ptr, info_ptr);
 
    // clean up after the write, and ifree any memory allocated
    png_destroy_write_struct(&png_ptr, &info_ptr);
 
    fclose(fp);
 
    return true;
 }

void FWTEveViewer::spawn_image_thread ( )

private

Definition at line 83 of file FWTEveViewer.cc.

References m_cnd, m_hh, m_imgBuffer, m_moo, m_name, m_prom, m_thr, m_thr_exit, m_ww, SaveJpg(), and SavePng().

Referenced by CaptureAndSaveImage().

 {
    std::unique_lock<std::mutex> lko(m_moo);
    
    m_thr = new std::thread([=]() {
          { std::unique_lock<std::mutex> lk(m_moo); m_cnd.notify_one(); }
          while (true)
          {
             {
                std::unique_lock<std::mutex> lk(m_moo);
                m_cnd.wait(lk);
 
                if (m_thr_exit)
                {
                   return;
                }
             }
             if (m_name.EndsWith(".jpg"))
             {
                SaveJpg(m_name, &m_imgBuffer[0], m_ww, m_hh);
             }
             else
             {
                SavePng(m_name, &m_imgBuffer[0], m_ww, m_hh);
             }
 
             m_prom.set_value(0);
          }
       });
 
    m_cnd.wait(lko);
 }

FWTGLViewer * FWTEveViewer::SpawnFWTGLViewer ( )

Definition at line 118 of file FWTEveViewer.cc.

References m_fwGlViewer.

Referenced by FWEveView::FWEveView().

 {
    TGCompositeFrame* cf = GetGUICompositeFrame();
 
    m_fwGlViewer = new FWTGLViewer(cf);
    SetGLViewer(m_fwGlViewer, m_fwGlViewer->GetFrame());
 
    cf->AddFrame(fGLViewerFrame, new TGLayoutHints(kLHintsNormal | kLHintsExpandX | kLHintsExpandY));
 
    fGLViewerFrame->MapWindow();
 
    if (fEveFrame == 0)
       PreUndock();
 
    return m_fwGlViewer;
 }