glcanvas.cpp

来自「ncbi源码」· C++ 代码 · 共 255 行

/*
 * ===========================================================================
 * PRODUCTION $Log: glcanvas.cpp,v $
 * PRODUCTION Revision 1000.1  2004/06/01 20:50:30  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.25
 * PRODUCTION
 * ===========================================================================
 */

/*  $Id: glcanvas.cpp,v 1000.1 2004/06/01 20:50:30 gouriano Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors:  Mike DiCuccio
 *
 * File Description:
 *    CGlCanvas -- provide standardized OpenGL view setup for FLTK
 */


#include <ncbi_pch.hpp>
#include <gui/opengl.h>
#include <gui/opengl/glcanvas.hpp>
#include <gui/opengl/glprint.hpp>
#include <gui/opengl/glutils.hpp>



BEGIN_NCBI_SCOPE

//
// hackish work-around to eliminate the default callback that FLTK uses...
//
static void s_NullCallback(Fl_Widget*, void*)
{
}


CGlCanvas::CGlCanvas(int x, int y, int width, int height, const char* label)
    : Fl_Gl_Window(x, y, width, height, label),
      m_RenderModes(0),
      m_Capture(false)
{
    callback(s_NullCallback);
}


CGlCanvas::~CGlCanvas(void)
{
}


void CGlCanvas::draw_print(void)
{
    m_Capture = true;
    draw();
    m_Capture = false;
}


void CGlCanvas::draw(void)
{
    x_SetupView();
    x_Draw();
    if (!m_Capture) {
        x_OverlayDraw();
    }
    CGlUtils::CheckGlError();
}


//
// CGlCanvas::setupRenderModes(void)
// this function sets a very basic set of render modes
//
void CGlCanvas::x_SetupRenderModes(void)
{
    if (m_RenderModes & fLighting) {
        glEnable(GL_LIGHTING);
    } else {
        glDisable(GL_LIGHTING);
    }

    if (m_RenderModes & fCullFace) {
        glEnable(GL_CULL_FACE);
    } else {
        glDisable(GL_CULL_FACE);
    }

    if (m_RenderModes & fDepthTest) {
        glEnable(GL_DEPTH_TEST);
    } else {
        glDisable(GL_DEPTH_TEST);
    }

    if (m_RenderModes & fTexture2D) {
        glEnable(GL_TEXTURE_2D);
    } else {
        glDisable(GL_TEXTURE_2D);
    }
}


void CGlCanvas::x_DrawBackground(float red, float green, float blue)
{
    glClearColor(red, green, blue, 0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}


void CGlCanvas::Print(const CPrintOptions& opts)
{
    make_current();

    const unsigned int orig_w = w();
    const unsigned int orig_h = h();

    const CPrintOptions::TOutputFormat fmt = opts.GetOutputFormat();
    if (CPrintOptions::s_IsRasterFormat(fmt)) {
        const unsigned int _w = opts.GetRasterWidth();
        const unsigned int _h = opts.GetRasterHeight();
        size(_w, _h);
    }

    GLPrint(this, &CGlCanvas::draw_print, opts);

    if (CPrintOptions::s_IsRasterFormat(fmt)) {
        size(orig_w, orig_h);
        draw();
    }
}



END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: glcanvas.cpp,v $
 * Revision 1000.1  2004/06/01 20:50:30  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.25
 *
 * Revision 1.25  2004/05/21 22:27:44  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.24  2003/09/29 15:43:43  dicuccio
 * +glutils.hpp for CGlUtils
 *
 * Revision 1.23  2003/07/21 19:31:34  dicuccio
 * Added NULL callback for CGlCanvas - works around interenting problem with
 * Fl_Gl_Window's default callback.  Removed unused ctor.
 *
 * Revision 1.22  2003/07/15 18:53:53  meric
 * Resize the canvas as requested if printing to a raster format
 *
 * Revision 1.21  2003/06/25 16:22:41  meric
 * Moved printing functionality to gui/opengl/gl_print and gui/utils/print
 *
 * Revision 1.20  2003/06/24 22:46:45  meric
 * Temporary fix: added includes to allow MSVC++ to compile error/warning-free.
 * These includes are for printing functionality, which will be moved shortly.
 *
 * Revision 1.19  2003/06/19 16:34:21  meric
 * Pass file type parameter to CAppPopup::PopupFile
 *
 * Revision 1.18  2003/06/19 00:54:58  dicuccio
 * Minor reformatting.  Changed LOG_POST() to _TRACE().
 *
 * Revision 1.17  2003/06/18 19:44:40  meric
 * Print: loop to increase size of feedback buffer as necessary
 *
 * Revision 1.16  2003/06/18 17:26:57  meric
 * Final phase of print reorg: print classes now in gui/utils
 *
 * Revision 1.15  2003/06/17 19:34:32  meric
 * Call CAppPopup::PopupFile() instead of CAppPopup::Popup()
 *
 * Revision 1.14  2003/06/17 12:08:42  meric
 * Fixed CVectorOutput to include separate call to SetOutputStream()
 * Remove static keyword from s_Print (anachronism)
 *
 * Revision 1.13  2003/06/16 21:20:31  meric
 * Changed auto_ptr<> to CRef<> on a CObject-derived class (COpenGLPrintBuffer)
 *
 * Revision 1.12  2003/06/16 19:10:59  meric
 * Remove print buffer from print context before the context is destroyed. (this
 * code was 'lost' in the previous update).
 *
 * Revision 1.11  2003/06/16 16:56:10  dicuccio
 * Fix compiler error for MSVC
 *
 * Revision 1.10  2003/06/16 15:59:10  dicuccio
 * Work-in-progress: everything compiles, still much reorganization to be done.
 * Moved generic functionality out of opengl/print/ and into gui/utils (print
 * options, print dialogs, etc.).  Removed interactive state from CGlCanvas.
 * Added hook in CView for opening standard print dialog, and for generic print
 * handling.  Restored log for glcanvas.cpp
 *
 * Revision 1.9  2003/06/13 18:44:04  meric
 * Initialization in x_Init(), which is called by all c'tors
 * Remove print-related functinality from draw(), which can now be
 * overridden freely without affecting the Print() function.
 * Add print functions [ Print(), x_Print() etc ]
 *
 * Revision 1.8  2003/05/22 15:51:06  meric
 * small changes to GL Feedback code (remains commented out)
 *
 * Revision 1.7  2003/05/13 19:25:20  dicuccio
 * Prepare CGlCanvas for printing support (Peter Meric)
 *
 * Revision 1.6  2003/05/06 15:59:44  dicuccio
 * Split CGlCanvas into 2D and 3D versions; moved hardware check into CGlUtils
 *
 * Revision 1.5  2003/03/28 17:16:01  dicuccio
 * Added first support for testing for hardware acceleration
 *
 * Revision 1.4  2003/01/13 13:10:11  dicuccio
 * Namespace clean-up.  Retired namespace gui -> converted all to namespace
 * ncbi.  Moved all FLUID-generated code into namespace ncbi.
 *
 * Revision 1.3  2002/11/14 16:24:44  dicuccio
 * Changed to include standard OpenGL headers through 'gui/opengl.h'
 *
 * Revision 1.2  2002/11/08 13:27:45  dicuccio
 * Code clean-up and reformatting.
 *
 * Revision 1.1  2002/11/05 20:21:47  dicuccio
 * Initial revision
 *
 * ===========================================================================
 */