KX_BlenderCanvas.cpp

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/*
 * $Id: KX_BlenderCanvas.cpp 35417 2011-03-09 01:25:59Z campbellbarton $
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "KX_BlenderCanvas.h"
#include "DNA_screen_types.h"
#include <stdio.h>


KX_BlenderCanvas::KX_BlenderCanvas(struct wmWindow *win, RAS_Rect &rect, struct ARegion *ar) :
m_win(win),
m_frame_rect(rect)
{
        // area boundaries needed for mouse coordinates in Letterbox framing mode
        m_area_left = ar->winrct.xmin;
        m_area_top = ar->winrct.ymax;
}

KX_BlenderCanvas::~KX_BlenderCanvas()
{
}

void KX_BlenderCanvas::Init()
{
        glDepthFunc(GL_LEQUAL);
}       


void KX_BlenderCanvas::SwapBuffers()
{
        BL_SwapBuffers(m_win);
}

void KX_BlenderCanvas::BeginFrame()
{
        glEnable(GL_DEPTH_TEST);
        glDepthFunc(GL_LEQUAL);

}


void KX_BlenderCanvas::EndFrame()
{
                // this is needed, else blender distorts a lot
        glPopAttrib();
        glPushAttrib(GL_ALL_ATTRIB_BITS);
                
        glDisable(GL_FOG);
}



void KX_BlenderCanvas::ClearColor(float r,float g,float b,float a)
{
        glClearColor(r,g,b,a);
}



void KX_BlenderCanvas::ClearBuffer(int type)
{
        int ogltype = 0;

        if (type & RAS_ICanvas::COLOR_BUFFER )
                ogltype |= GL_COLOR_BUFFER_BIT;

        if (type & RAS_ICanvas::DEPTH_BUFFER )
                ogltype |= GL_DEPTH_BUFFER_BIT;
        glClear(ogltype);
}

int KX_BlenderCanvas::GetWidth(
) const {
        return m_frame_rect.GetWidth();
}

int KX_BlenderCanvas::GetHeight(
) const {
        return m_frame_rect.GetHeight();
}

int KX_BlenderCanvas::GetMouseX(int x)
{
        float left = GetWindowArea().GetLeft();
        return float(x - (left - m_area_left));
}

int KX_BlenderCanvas::GetMouseY(int y)
{
        float top = GetWindowArea().GetTop();
        return float(y - (m_area_top - top));
}

float KX_BlenderCanvas::GetMouseNormalizedX(int x)
{
        int can_x = GetMouseX(x);
        return float(can_x)/this->GetWidth();
}

float KX_BlenderCanvas::GetMouseNormalizedY(int y)
{
        int can_y = GetMouseY(y);
        return float(can_y)/this->GetHeight();
}

RAS_Rect &
KX_BlenderCanvas::
GetWindowArea(
){
        return m_area_rect;
}       

        void
KX_BlenderCanvas::
SetViewPort(
        int x1, int y1,
        int x2, int y2
){
        /*      x1 and y1 are the min pixel coordinate (e.g. 0)
                x2 and y2 are the max pixel coordinate
                the width,height is calculated including both pixels
                therefore: max - min + 1
        */
        int vp_width = (x2 - x1) + 1;
        int vp_height = (y2 - y1) + 1;
        int minx = m_frame_rect.GetLeft();
        int miny = m_frame_rect.GetBottom();

        m_area_rect.SetLeft(minx + x1);
        m_area_rect.SetBottom(miny + y1);
        m_area_rect.SetRight(minx + x2);
        m_area_rect.SetTop(miny + y2);

        glViewport(minx + x1, miny + y1, vp_width, vp_height);
        glScissor(minx + x1, miny + y1, vp_width, vp_height);
}


void KX_BlenderCanvas::SetMouseState(RAS_MouseState mousestate)
{
        m_mousestate = mousestate;

        switch (mousestate)
        {
        case MOUSE_INVISIBLE:
                {
                        BL_HideMouse(m_win);
                        break;
                }
        case MOUSE_WAIT:
                {
                        BL_WaitMouse(m_win);
                        break;
                }
        case MOUSE_NORMAL:
                {
                        BL_NormalMouse(m_win);
                        break;
                }
        default:
                {
                }
        }
}



//      (0,0) is top left, (width,height) is bottom right
void KX_BlenderCanvas::SetMousePosition(int x,int y)
{
        int winX = m_frame_rect.GetLeft();
        int winY = m_frame_rect.GetBottom();
        int winH = m_frame_rect.GetHeight();
        
        BL_warp_pointer(m_win, winX + x, winY + (winH-y));
}



void KX_BlenderCanvas::MakeScreenShot(const char* filename)
{
        ScrArea area_dummy= {0};
        area_dummy.totrct.xmin = m_frame_rect.GetLeft();
        area_dummy.totrct.xmax = m_frame_rect.GetRight();
        area_dummy.totrct.ymin = m_frame_rect.GetBottom();
        area_dummy.totrct.ymax = m_frame_rect.GetTop();

        BL_MakeScreenShot(&area_dummy, filename);
}