GUIFactory.cpp

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// ****************************************************************************
// This file is part of the Integrating Vision Toolkit (IVT).
//
// The IVT is maintained by the Karlsruhe Institute of Technology (KIT)
// (www.kit.edu) in cooperation with the company Keyetech (www.keyetech.de).
//
// Copyright (C) 2014 Karlsruhe Institute of Technology (KIT).
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the KIT nor the names of its contributors may be
//    used to endorse or promote products derived from this software
//    without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE KIT AND CONTRIBUTORS “AS IS” AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE KIT OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ****************************************************************************
// ****************************************************************************
// Filename:  GUIFactory.cpp
// Author:    Florian Hecht
// Date:      2008
// ****************************************************************************


// ****************************************************************************
// Includes
// ****************************************************************************

#include "Image/ByteImage.h"

#include <string.h>



#ifdef USE_QTGUI

#include "gui/Qt/QtApplicationHandler.h"
#include "gui/Qt/QtMainWindow.h"

CApplicationHandlerInterface *CreateApplicationHandler(int argc, char **argv)
{
        return new CQtApplicationHandler(argc, argv);
}

CMainWindowInterface *CreateMainWindow(int x, int y, int width, int height, const char *title)
{
        return new CQtMainWindow(x, y, width, height, title);
}

#include <qapplication.h>
#include <qfiledialog.h>

#if QT_VERSION >= 0x040000
#define GET_ASCII toAscii
#else
#define GET_ASCII ascii
#endif

static char app_name[] = "IVT_APPLICATION\0";
static int my_argc = 1;
static char *my_argv[2] = { app_name, NULL};

// opens a file dialog and returns true if a filename was selected. The compelete path is returned in filename (the buffer has to be big enough)
bool FileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length)
{
        QApplication *pApp = NULL;
        if (qApp == NULL)
        {
                pApp = new QApplication(my_argc, my_argv);
        }
        
        char filter_str[1024];
        char *fs = filter_str;
        *fs = 0;

        for (int i = 0; i < num_filter; i++) 
        {
                if (i == num_filter - 1)
                {
                        sprintf(fs, "%s (%s)", filter[(2*i)], filter[(2*i) + 1]);
                        fs += strlen(filter[(2*i)]) + strlen(filter[(2*i) + 1]) + 3;
                }
                else
                {
                        sprintf(fs, "%s (%s);;", filter[(2*i)], filter[(2*i) + 1]);
                        fs += strlen(filter[(2*i)]) + strlen(filter[(2*i) + 1]) + 5;
                }
        }
        *fs++ = 0;
        
        if (save_dialog)
        {
                #if QT_VERSION >= 0x040000
                QString s = QFileDialog::getSaveFileName(0, caption, NULL, filter_str);
                #else
                QString s = QFileDialog::getSaveFileName(QString(filename), filter_str, 0, "Save File Dialog", caption);
                #endif
                
                if (s.length() > 0)
                {
                        strncpy(filename, s.GET_ASCII(), max_length);
                        
                        if (pApp)
                        {
                                delete pApp;
                                pApp = NULL;
                        }
                        
                        return true;    
                }
        }
        else
        {
                #if QT_VERSION >= 0x040000
                QString s = QFileDialog::getOpenFileName(0, caption, NULL, filter_str);
                #else
                QString s = QFileDialog::getOpenFileName(QString(filename), filter_str, 0, "Open File Dialog", caption);
                #endif
                
                if (s.length() > 0)
                {
                        strncpy(filename, s.GET_ASCII(), max_length);
                        
                        if (pApp)
                        {
                                delete pApp;
                                pApp = NULL;
                        }
                        
                        return true;    
                }
        }
        
        if (pApp)
        {
                delete pApp;
                pApp = NULL;
        }
        
        return false;
}

#include <qimage.h>

// load an image from file. The supported filetypes depend on the plattform
bool LoadImageFromFile(const char *filename, CByteImage *pImage)
{
        QApplication *pApp = NULL;
        if (qApp == NULL)
        {
                int argc = 1;
                char *argv[] = {app_name, NULL};
        
                pApp = new QApplication(argc, argv);
        }
        
        QImage img(filename, 0);
        
        if (!img.isNull())
        {
                if (img.depth() != 8 && img.depth() != 24 && img.depth() != 32)
                {
                        printf("error: LoadImageFromFile: image '%s' has an unsupported bit depth of %d bpp\n", filename, img.depth());
                        return false;
                }
                
                int width = img.width();
                int height = img.height();
                
                if (pImage->m_bOwnMemory)
                        delete [] pImage->pixels;
                
                pImage->width = width;
                pImage->height = height;
                pImage->bytesPerPixel = (img.depth() == 8 ? 1 : 3);
                pImage->type = (img.depth() <= 8 ? CByteImage::eGrayScale : CByteImage::eRGB24);
                pImage->pixels = new unsigned char[pImage->bytesPerPixel * width*height];
                pImage->m_bOwnMemory = true;
                
                uchar *ptr = img.bits();
                if (img.depth() == 32)
                {
                        unsigned char *output = pImage->pixels;
                        
                        int size = width * height;
                        for (int i = 0; i < size; i++)
                        {
                                output[3*i    ] = ptr[4*i + 2];
                                output[3*i + 1] = ptr[4*i + 1];
                                output[3*i + 2] = ptr[4*i    ];
                        }
                }
                else
                {
                        memcpy(pImage->pixels, ptr, pImage->bytesPerPixel * width*height);
                }
                
                if (pApp)
                {
                        delete pApp;
                        pApp = NULL;
                }
        
                return true;
        }
        
        if (pApp)
        {
                delete pApp;
                pApp = NULL;
        }
        
        return false;
}

#else


#if defined(USE_GTKGUI) && !defined(USE_REMOTEGUI)

#include "gui/GTK/GTKApplicationHandler.h"
#include "gui/GTK/GTKMainWindow.h"

CApplicationHandlerInterface *CreateApplicationHandler(int argc, char **argv)
{
        return new CGTKApplicationHandler(argc, argv);
}

CMainWindowInterface *CreateMainWindow(int x, int y, int width, int height, const char *title)
{
        return new CGTKMainWindow(x, y, width, height, title);
}

// opens a file dialog and returns true if a filename was selected. The complete path is returned in filename (the buffer has to be big enough)
bool FileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length)
{
        // TODO: implement for GTK
        GtkWidget *dialog;
        
        if (save_dialog)
        {
                dialog = gtk_file_chooser_dialog_new (caption,
                                                      NULL,
                                                      GTK_FILE_CHOOSER_ACTION_SAVE,
                                                      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                                      GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
                                                      NULL);
        }
        else
        {
                dialog = gtk_file_chooser_dialog_new (caption,
                                                      NULL,
                                                      GTK_FILE_CHOOSER_ACTION_OPEN,
                                                      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                                      GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
                                                      NULL);
        }
        
        gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(dialog), filename);

        for (int i = 0; i < num_filter; i++)
        {
                GtkFileFilter *f = gtk_file_filter_new();
                gtk_file_filter_set_name(f, filter[2*i]);
                gtk_file_filter_add_pattern(f, filter[2*i+1]);
                gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), f);
        }
        
        if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
        {
                char *file;
                file = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
                strncpy(filename, file, max_length);
                g_free (file);
                
                gtk_widget_destroy (dialog);
                
                return true;
        }
        
        gtk_widget_destroy (dialog);
        
        return false;
}


// load an image from file. The supported filetypes depend on the plattform
bool LoadImageFromFile(const char *filename, CByteImage *pImage)
{
        bool success = false;
        
        GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
        if (pixbuf)
        {
                int channels = gdk_pixbuf_get_n_channels(pixbuf);
                int bits_per_sample = gdk_pixbuf_get_bits_per_sample(pixbuf);
                unsigned char *pixels = gdk_pixbuf_get_pixels(pixbuf);
                int width = gdk_pixbuf_get_width(pixbuf);
                int height = gdk_pixbuf_get_height(pixbuf);
                int rowstride = gdk_pixbuf_get_rowstride(pixbuf);
                
                if (bits_per_sample == 8 && (channels == 1 || channels == 3  || channels == 4))
                {
                        if (pImage->m_bOwnMemory)
                                delete [] pImage->pixels;
                
                        pImage->width = width;
                        pImage->height = height;
                        pImage->bytesPerPixel = channels;
                        pImage->type = (channels == 3 ? CByteImage::eGrayScale : CByteImage::eRGB24);
                        pImage->pixels = new unsigned char[pImage->bytesPerPixel * width * height];
                        pImage->m_bOwnMemory = true;
                        
                        if (channels == 1)
                        {
                                for (int y = 0; y < height; y++)
                                {
                                        memcpy(&pImage->pixels[y*width], pixels, width);
                                        pixels += rowstride;
                                }
                        }
                        else
                        {
                                if (channels == 3)
                                {
                                        for (int y = 0; y < height; y++)
                                        {
                                                memcpy(&pImage->pixels[3*y*width], pixels, 3*width);
                                                pixels += rowstride;
                                        }
                                }
                                else
                                {
                                        // discard the alpha channel
                                        for (int y = 0; y < height; y++)
                                        {
                                                for (int x = 0; x < width; x++)
                                                {
                                                        pImage->pixels[3*(y*width + x)] = pixels[4*x];
                                                        pImage->pixels[3*(y*width + x)+1] = pixels[4*x+1];
                                                        pImage->pixels[3*(y*width + x)+2] = pixels[4*x+2];
                                                }
                                                
                                                pixels += rowstride;
                                        }
                                }
                        }
                        
                        success = true;
                }

        }
        
        return success;
}

#else


#if defined(WIN32) && !defined(USE_REMOTEGUI)

#include "gui/win32/Win32ApplicationHandler.h"
#include "gui/win32/Win32MainWindow.h"

CApplicationHandlerInterface *CreateApplicationHandler(int argc, char **argv)
{
        return new CWin32ApplicationHandler();
}

CMainWindowInterface *CreateMainWindow(int x, int y, int width, int height, const char *title)
{
        return new CWin32MainWindow(x, y, width, height, title);
}

#include <windows.h>

// opens a file dialog and returns true if a filename was selected. The compelete path is returned in filename (the buffer has to be big enough)
bool FileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length)
{
        char filter_str[1024];
        char *fs = filter_str;
        *fs = 0;

        for (int i = 0; i < num_filter; i++) 
        {
                sprintf(fs, "%s", filter[(2*i)]);
                fs += strlen(filter[(2*i)]) + 1;

                sprintf(fs, "%s", filter[(2*i) + 1]);
                fs += strlen(filter[(2*i) + 1]) + 1;
        }
        *fs++ = 0;

        OPENFILENAME ofn;
        memset(&ofn, 0, sizeof(OPENFILENAME));

        ofn.lStructSize = sizeof(OPENFILENAME);
        ofn.hwndOwner = NULL;
        ofn.hInstance = NULL;
        ofn.lpstrFilter = filter_str;
        ofn.lpstrCustomFilter = NULL;
        ofn.nMaxCustFilter = 0;
        ofn.nFilterIndex = 1;
        ofn.lpstrFile = filename;
        ofn.nMaxFile = max_length;
        ofn.lpstrFileTitle = NULL;
        ofn.nMaxFileTitle = 0;
        ofn.lpstrInitialDir = NULL;
        ofn.lpstrTitle = caption;
        ofn.Flags = 0; //OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST;
        ofn.nFileOffset = 0;
        ofn.nFileExtension = 0;
        ofn.lpstrDefExt = NULL;
        ofn.lCustData = 0;
        ofn.lpfnHook = NULL;
        ofn.lpTemplateName = NULL;

        if (save_dialog)
        {
                if (GetSaveFileName(&ofn))
                {
                        return true;
                }
        }
        else
        {
                if (GetOpenFileName(&ofn))
                {
                        return true;
                }
        }

        return false;
}

#include <olectl.h>

// load an image from file. The supported filetypes depend on the plattform
bool LoadImageFromFile(const char *filename, CByteImage *pImage)
{
        HDC                     hdcTemp;                                                                                                // The DC To Hold Our Bitmap
        HBITMAP         hbmpTemp;                                                                                               // Holds The Bitmap Temporarily
        IPicture        *pPicture;                                                                                              // IPicture Interface
        OLECHAR         wszPath[MAX_PATH+1];                                                                    // Full Path To Picture (WCHAR)
        long            lWidth;                                                                                                 // Width In Logical Units
        long            lHeight;                                                                                                // Height In Logical Units
        long            lWidthPixels;                                                                                   // Width In Pixels
        long            lHeightPixels;                                                                                  // Height In Pixels

        MultiByteToWideChar(CP_ACP, 0, filename, -1, wszPath, MAX_PATH);        // Convert From ASCII To Unicode
        HRESULT hr = OleLoadPicturePath(wszPath, 0, 0, 0, IID_IPicture, (void**)&pPicture);

        if(FAILED(hr))                                                                                                          // If Loading Failed
                return false;                                                                                                   // Return False

        hdcTemp = CreateCompatibleDC(GetDC(0));                                                         // Create The Windows Compatible Device Context
        if(!hdcTemp)                                                                                                            // Did Creation Fail?
        {
                pPicture->Release();                                                                                    // Decrements IPicture Reference Count
                return false;                                                                                                   // Return False (Failure)
        }
        
        pPicture->get_Width(&lWidth);                                                                           // Get IPicture Width (Convert To Pixels)
        lWidthPixels    = MulDiv(lWidth, GetDeviceCaps(hdcTemp, LOGPIXELSX), 2540);
        pPicture->get_Height(&lHeight);                                                                         // Get IPicture Height (Convert To Pixels)
        lHeightPixels   = MulDiv(lHeight, GetDeviceCaps(hdcTemp, LOGPIXELSY), 2540);
        
        //      Create A Temporary Bitmap
        BITMAPINFO      bi = {0};                                                                                               // The Type Of Bitmap We Request
        DWORD           *pBits = 0;                                                                                             // Pointer To The Bitmap Bits

        bi.bmiHeader.biSize                     = sizeof(BITMAPINFOHEADER);                             // Set Structure Size
        bi.bmiHeader.biBitCount         = 32;                                                                   // 32 Bit
        bi.bmiHeader.biWidth            = lWidthPixels;                                                 // Power Of Two Width
        bi.bmiHeader.biHeight           = lHeightPixels;                                                // Make Image Top Up (Positive Y-Axis)
        bi.bmiHeader.biCompression      = BI_RGB;                                                               // RGB Encoding
        bi.bmiHeader.biPlanes           = 1;                                                                    // 1 Bitplane

        //      Creating A Bitmap This Way Allows Us To Specify Color Depth And Gives Us Imediate Access To The Bits
        hbmpTemp = CreateDIBSection(hdcTemp, &bi, DIB_RGB_COLORS, (void**)&pBits, 0, 0);
        
        if(!hbmpTemp)                                                                                                           // Did Creation Fail?
        {
                DeleteDC(hdcTemp);                                                                                              // Delete The Device Context
                pPicture->Release();                                                                                    // Decrements IPicture Reference Count
                return false;                                                                                                   // Return False (Failure)
        }

        SelectObject(hdcTemp, hbmpTemp);                                                                        // Select Handle To Our Temp DC And Our Temp Bitmap Object

        // Render The IPicture On To The Bitmap
        pPicture->Render(hdcTemp, 0, 0, lWidthPixels, lHeightPixels, 0, 0, lWidth, lHeight, 0);

        
        if (pImage->m_bOwnMemory)
                delete [] pImage->pixels;
        
        pImage->width = lWidthPixels;
        pImage->height = lHeightPixels;
        pImage->bytesPerPixel = 3;
        pImage->type = CByteImage::eRGB24;
        pImage->pixels = new unsigned char[pImage->bytesPerPixel * lWidthPixels*lHeightPixels];
        pImage->m_bOwnMemory = true;

        unsigned char *output = pImage->pixels;

        // Convert From BGR To RGB Format And Add An Alpha Value Of 255
        for(long i = 0; i < lWidthPixels * lHeightPixels; i++)                          // Loop Through All Of The Pixels
        {
                BYTE* pPixel    = (BYTE*)(&pBits[i]);                                                   // Grab The Current Pixel
                output[3*i]             = pPixel[2];                                                                    // Store 1st Color In Temp Variable (Blue)
                output[3*i + 1] = pPixel[1];                                                                    // Move Red Value To Correct Position (1st)
                output[3*i + 2] = pPixel[0];                                                                    // Move Temp Value To Correct Blue Position (3rd)
        }

        DeleteObject(hbmpTemp);                                                                                         // Delete The Object
        DeleteDC(hdcTemp);                                                                                                      // Delete The Device Context

        pPicture->Release();                                                                                            // Decrements IPicture Reference Count

        return true;
}

#else


#ifdef USE_COCOAGUI

#include "gui/Cocoa/CocoaApplicationHandler.h"
#include "gui/Cocoa/CocoaMainWindow.h"

CApplicationHandlerInterface *CreateApplicationHandler(int argc, char **argv)
{
        return new CCocoaApplicationHandler();
}

CMainWindowInterface *CreateMainWindow(int x, int y, int width, int height, const char *title)
{
        return new CCocoaMainWindow(x, y, width, height, title);
}

// these functions are defined in GUIFactory.m
extern "C"
{
        bool CocoaFileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length);
        bool CocoaLoadImage(const char *filename, unsigned char **ptr, int *width, int *height, int *type);
        void CocoaFreeImageMem(unsigned char *ptr);
}

// opens a file dialog and returns true if a filename was selected. The compelete path is returned in filename (the buffer has to be big enough)
bool FileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length)
{
        char buf[64];
        
        char **cocoa_filters = NULL;
        if (filter != NULL) {
                cocoa_filters = new char*[num_filter];
                for (int i = 0; i < num_filter; i++)
                {
                        sscanf(filter[2*i + 1], "*.%s", buf);
                        cocoa_filters[i] = new char[strlen(buf) + 1];
                        strcpy(cocoa_filters[i], buf);
                }
        }
        
        bool result = CocoaFileDialog(save_dialog, (const char**)cocoa_filters, num_filter, caption, filename, max_length);
        
        if (cocoa_filters != NULL)
        {
                for (int i = 0; i < num_filter; i++)
                {
                        delete [] cocoa_filters[i];
                }
                delete [] cocoa_filters;
        }

        return result;
}

// load an image from file. The supported filetypes depend on the plattform
bool LoadImageFromFile(const char *filename, CByteImage *pImage)
{
        unsigned char *ptr = NULL;
        int width = -1;
        int height = -1;
        int type = -1;
        
        if (CocoaLoadImage(filename, &ptr, &width, &height, &type))
        {
                if (pImage->m_bOwnMemory)
                        delete [] pImage->pixels;
        
                pImage->width = width;
                pImage->height = height;
                pImage->bytesPerPixel = (type == 1 ? 1 : 3);
                pImage->type = (type == 1 ? CByteImage::eGrayScale : CByteImage::eRGB24);
                pImage->pixels = new unsigned char[pImage->bytesPerPixel * width * height];
                pImage->m_bOwnMemory = true;
                
                memcpy(pImage->pixels, ptr, pImage->bytesPerPixel * width * height);
        
                CocoaFreeImageMem(ptr);
                
                return true;
        }
        
        return false;
}

#else


#ifdef USE_REMOTEGUI

#include "gui/Remote/RemoteApplicationHandler.h"
#include "gui/Remote/RemoteMainWindow.h"

CApplicationHandlerInterface *CreateApplicationHandler(int argc, char **argv)
{
        return new CRemoteApplicationHandler(argc, argv);
}

CMainWindowInterface *CreateMainWindow(int x, int y, int width, int height, const char *title)
{
        CRemoteApplicationHandler *app_handler = CRemoteApplicationHandler::GetApplicationHandler();
        
        if (!app_handler)
                return NULL;
                
        return app_handler->CreateMainWindow(x, y, width, height, title);
}

// opens a file dialog and returns true if a filename was selected. The compelete path is returned in filename (the buffer has to be big enough)
bool FileDialog(bool save_dialog, const char **filter, int num_filter, const char *caption, char *filename, int max_length)
{
        // not available for the remote gui system
        return false;
}

// load an image from file. The supported filetypes depend on the plattform
bool LoadImageFromFile(const char *filename, CByteImage *pImage)
{
        // not available for the remote gui system
        return false;
}

#endif /* ifdef USE_REMOTEGUI */


#endif /* ifdef USE_COCOAGUI */


#endif /* ifdef WIN32 */


#endif /* ifdef USE_GTKGUI */


#endif /* ifdef USE_QTGUI */