KX_BlenderCanvas.cpp

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/*
 * ***** 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);
}