DisplayWindow.cpp

/*
 * Copyright (c) 2008-2011 Travis Geiselbrecht
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include "DisplayWindow.h"
#include "RenderSurface.h"
#include <iostream>
#include <sys/time.h>
#include <time.h>
#include <sdl.h>

DisplayWindow::DisplayWindow(int width, int height)
    :   m_Width(width),
        m_Height(height),
        m_Surface(0),
        m_Screen(0),
        m_SrcSurface(0),
        m_Dirty(false)
{
    m_Lock = SDL_CreateMutex();
}

DisplayWindow::~DisplayWindow()
{
    SDL_FreeSurface(m_SrcSurface);
    SDL_DestroyMutex(m_Lock);
}

static Uint32 TimerTick(Uint32 interval, void *param)
{
    DisplayWindow *dw = (DisplayWindow *)param;
    dw->Tick();

    return interval;
}

int DisplayWindow::CreateWindow()
{

    m_Screen = SDL_SetVideoMode(m_Width, m_Height, 32, SDL_SWSURFACE);
    SDL_UpdateRect(m_Screen, 0,0,0,0); // Update entire surface

    SDL_WM_SetCaption("Ray","ray");

    SDL_AddTimer(1000, &TimerTick, this);

    m_SrcSurface = SDL_CreateRGBSurface(SDL_SWSURFACE,
                                        m_Surface->Width(), m_Surface->Height(), 32,
                                        0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);

    return 0;
}

void DisplayWindow::SetRenderSurface(RenderSurface &surface)
{
    m_Surface = &surface;

    // set the callback
//  surface.SetNotification(this);
}

void DisplayWindow::RenderNotify(int x, int y)
{
    SDL_LockMutex(m_Lock);

    SDL_LockSurface(m_SrcSurface);
    color32 c32 = m_Surface->GetXY(x, y);
    ((uint32_t *)m_SrcSurface->pixels)[y * m_Surface->Width() + x] = c32;
    SDL_UnlockSurface(m_SrcSurface);

    m_Dirty = true;

    SDL_UnlockMutex(m_Lock);
}

void DisplayWindow::SurfaceBlit()
{
    // scale between them
    SDL_Rect srcrect = { 0, 0, m_Surface->Width(), m_Surface->Height() };
    SDL_Rect dstrect = { 0, 0, m_Width, m_Height };
    SDL_LockSurface(m_SrcSurface);
    SDL_SoftStretch(m_SrcSurface, &srcrect, m_Screen, &dstrect);
    SDL_UnlockSurface(m_SrcSurface);

//  printf("src %d %d dest %d %d\n", m_Surface->Width(), m_Surface->Height(), m_Width, m_Height);
}

void DisplayWindow::Tick()
{
    if (m_Dirty) {
        m_Dirty = false;
        SurfaceBlit();
        SDL_UpdateRect(m_Screen, 0, 0, 0, 0);
    }
}