/***************************************************************************
                          gui_render.cpp  -  description

	The final render a frame. The external interface is the same
	whatever the mean (RGB/YUV/Xv)
                             -------------------
    begin                : Thu Jan 3 2002
    copyright            : (C) 2002 by mean
    email                : fixounet@free.fr
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "config.h"
#include "ADM_default.h"
#include "DIA_coreToolkit.h"
#include "GUI_render.h"
#include "GUI_renderInternal.h"
#include "GUI_accelRender.h"
#include "GUI_nullRender.h"
#include "prefs.h"


extern VideoRenderBase *spawnSimpleRender();

#ifdef USE_XV
extern VideoRenderBase *spawnXvRender();
#endif

#ifdef USE_SDL
extern VideoRenderBase *spawnSdlRender();
#endif

#ifdef USE_VDPAU
extern VideoRenderBase *spawnVDPAURender();
#endif

#ifdef USE_LIBVA
extern VideoRenderBase *spawnLIBVARender();
#endif

#if defined (USE_OPENGL)
extern VideoRenderBase *RenderSpawnQtGl(void);
#endif
#if defined (USE_DXVA2)
extern VideoRenderBase *RenderSpawnDxva2(void);
#endif
#include "ADM_colorspace.h"
#include "DIA_uiTypes.h"

//_____________________________________
//_____________________________________
static VideoRenderBase *renderer=NULL;
static uint8_t         *accelSurface=NULL;
static bool             spawnRenderer(void);
//_______________________________________

static void         *draw=NULL;
static uint32_t     phyW=0,phyH=0; /* physical window size */
static float        lastZoom=ZOOM_1_1;
static uint8_t      _lock=0;

static const UI_FUNCTIONS_T *HookFunc=NULL;
static bool  enableDraw=true;

refreshSB refreshCallback=NULL;
/**
 * \fn renderGetName
 * @param name
 */
void renderGetName(std::string &name)
{
    if(!renderer) name=std::string("None");
    else name=std::string(renderer->getName());
}

/**
    \fn renderHookRefreshRequest
    \brief Hook the callback when a renderer requests a full redraw
*/
bool renderHookRefreshRequest(refreshSB cb)
{
    refreshCallback=cb;
    return true;
}
/**
 *      \fn ADM_renderLibInit
 *      \brief Initialize the renderlib with the needed external functions
 * 
 */
uint8_t ADM_renderLibInit(const UI_FUNCTIONS_T *funcs)
  {
    HookFunc=funcs;
    ADM_assert(funcs->apiVersion==ADM_RENDER_API_VERSION_NUMBER);
    return 1;
  }
//**************************************
//**************************************
//**************************************
#define RENDER_CHECK(x) {ADM_assert(HookFunc);ADM_assert(HookFunc->x);}
void MUI_getWindowInfo(void *draw, GUI_WindowInfo *xinfo)
{
  RENDER_CHECK(UI_getWindowInfo);
  HookFunc->UI_getWindowInfo(draw, xinfo);
}
static void MUI_updateDrawWindowSize(void *win,uint32_t w,uint32_t h)
{
   RENDER_CHECK(UI_updateDrawWindowSize);
   HookFunc->UI_updateDrawWindowSize(win,w,h);
}
static   ADM_RENDER_TYPE MUI_getPreferredRender(void)
{
  RENDER_CHECK(UI_getPreferredRender);
  return HookFunc->UI_getPreferredRender();
}
void *MUI_getDrawWidget(void)
{
  RENDER_CHECK(UI_getDrawWidget);
  return HookFunc->UI_getDrawWidget();
}

//**************************************
//**************************************
//**************************************

/**
	Render init, initialize internals. Constuctor like function

*/
uint8_t renderInit( void )
{
    draw=MUI_getDrawWidget(  );
    enableDraw=false;
    return 1;
}

void renderDestroy(void)
{
    ADM_info("Cleaning up Render\n");
    if(renderer)
    {
        renderer->stop();
        delete renderer;
        renderer=NULL;
    }
    enableDraw=false;
}

/**
    \fn renderLock
    \brief Take the weak lock (i.e. not threadsafe)
*/
uint8_t renderLock(void)
{
  ADM_assert(!_lock);
  _lock=1; 
  return 1;
}
uint8_t renderUnlock(void)
{
  ADM_assert(_lock);
  _lock=0; 
  return 1;
}

/**
	Warn the renderer that the display size is changing

*/
//----------------------------------------
uint8_t renderDisplayResize(uint32_t w, uint32_t h, float zoom)
{
        bool create=false;
        enableDraw=false;
        ADM_info("Render to %" PRIu32"x%" PRIu32" zoom=%.4f, old one =%d x %d, zoom=%.4f, renderer=%p\n",w,h,zoom,phyW,phyH,lastZoom,renderer);
        // Check if something has changed...
        
        
        if(renderer && w==phyW && h==phyH && zoom==lastZoom)
        {
            ADM_info("          No change, nothing to do\n");
            return true;
        }
        
        if(!renderer || (w!=phyW || h!=phyH)) 
        {
            if(renderer) 
            {
                renderer->stop();
                delete renderer;
                renderer=NULL;
            }
            phyW=w;
            phyH=h;
            lastZoom=zoom;
            if(w && h)
                spawnRenderer();
        }else // only zoom changed
        {
              renderer->changeZoom(zoom);
        }
         // Resize widget to be the same as input after zoom
         lastZoom=zoom;
        MUI_updateDrawWindowSize(draw,(uint32_t)((float)w*zoom),(uint32_t)((float)h*zoom));
        if(w && h)
            renderCompleteRedrawRequest();
        UI_purge();
        return 1;
}
/**
	Update the image and render it
	The width and hiehgt must NOT have changed

*/
//----------------------------------------
uint8_t renderUpdateImage(ADMImage *image)
{
    if(!renderer)
    {
        ADM_warning("Render update image without renderer\n");
        return 0;
    }
    ADM_assert(!_lock);
    enableDraw=true;
    if(renderer->getPreferedImage()!=image->refType)
            image->hwDownloadFromRef();
    
    renderer->displayImage(image);
    return 1;
}
/**
	Refresh the image from internal buffer / last image
	Used for example as call back for X11 events

*/
//_______________________________________________
uint8_t renderRefresh(void)
{
      if(_lock) return 1;
      if(enableDraw==false) return true;
      if(renderer)
        renderer->refresh();
      return 1;
}
/**
    \fn renderCompleteRedrawRequest
    \brief ask the *caller* to redraw, whereas expose/refresh asks the renderer to refresh
*/
bool renderCompleteRedrawRequest(void)
{
    ADM_info("RedrawRequest\n");
    if(enableDraw==false) return true;
    if(refreshCallback)
        refreshCallback();
    return true;
}
/**
    \fn renderExpose
*/
uint8_t renderExpose(void)
{
    if(enableDraw==false) return true;
    renderRefresh();
    return 1;
}
/**
    \fn spawnRenderer
    \brief Create renderer according to prefs
*/
#if ADM_UI_TYPE_BUILD == ADM_UI_CLI

bool spawnRenderer(void)
{
    renderer=new nullRender();
    return true; 
}
#else

#define TRY_RENDERER_INTERNAL(clss,create,name) \
                renderer=create clss(); \
                r=renderer->init(&xinfo,phyW,phyH,lastZoom); \
                if(!r) \
                { \
                    delete renderer; \
                    renderer=NULL; \
                    ADM_warning(name" init failed\n"); \
                }\
                else \
                { \
                    ADM_info(name" init ok\n"); \
                }
//#define TRY_RENDERER_CLASS(clss,name) TRY_RENDERER_INTERNAL(clss,new,name)
//#define TRY_RENDERER_FUNC(func,name) TRY_RENDERER_INTERNAL(func,,name)
#define TRY_RENDERER_SPAWN(spawn,name)  TRY_RENDERER_INTERNAL(spawn,,name)
/**
 * 
 * @param renderName
 * @return 
 */
bool spawnRenderer(void)
{
        int prefRenderer=MUI_getPreferredRender();
        bool r=false;

        GUI_WindowInfo xinfo;
        MUI_getWindowInfo(draw, &xinfo);
        switch(prefRenderer)
        {
#if defined(USE_DXVA2)
       case RENDER_DXVA2:
            {
                TRY_RENDERER_SPAWN(RenderSpawnDxva2,"Dxva2");
                break;
            }
#endif
#if defined(USE_OPENGL)
       case RENDER_QTOPENGL:
            {
                bool hasOpenGl=false;
                prefs->get(FEATURES_ENABLE_OPENGL,&hasOpenGl);
                if(!hasOpenGl)
                {
                    ADM_warning("OpenGl is disabled\n");
                    renderer=NULL;
                }else
                {
                    TRY_RENDERER_SPAWN(RenderSpawnQtGl,"QtGl");
                }
                break;
            }
#endif

#if defined(USE_VDPAU)
       case RENDER_VDPAU:
                TRY_RENDERER_SPAWN(spawnVDPAURender,"VDPAU")
                break;
#endif
#if defined(USE_LIBVA)
       case RENDER_LIBVA:
                TRY_RENDERER_SPAWN(spawnLIBVARender,"LIBVA")
                break;
#endif

#if defined(USE_XV)
       case RENDER_XV:
                TRY_RENDERER_SPAWN(spawnXvRender,"Xv")
                break;
#endif

#if  defined(USE_SDL)
    case RENDER_SDL:
                TRY_RENDERER_SPAWN(spawnSdlRender,"SDL")
                break;        
#endif
        }
        if(!renderer)
        {
            TRY_RENDERER_SPAWN(spawnSimpleRender,"simpleRenderer");
            ADM_assert(renderer);
        }
        return true;
}
#endif

/**
    \fn 
*/
uint8_t renderStartPlaying( void )
{

	return 1;
}

/**
    \fn renderStopPlaying
*/
uint8_t renderStopPlaying( void )
{      
      
      return true;
}
/**
    \fn renderExposeEventFromUI
    \brief retrurn true if UI(gtk/qt) should handle redraw
*/
bool    renderExposeEventFromUI(void)
{
    if(!renderer) return true;
    if(renderer->usingUIRedraw()==true) return true;
    renderer->refresh();
    return false;

}
/**
    \fn renderGetPreferedImageFormat
    \brief get the prefered hw accelerated image format (NONE,VDPAU,...)
*/  
ADM_HW_IMAGE renderGetPreferedImageFormat(void)
{
    if(!renderer) return ADM_HW_NONE;
    return renderer->getPreferedImage();
}

//***************************************
/**
    \fn calcDisplayFromZoom
*/
bool VideoRenderBase::calcDisplayFromZoom(float zoom)
{
    displayWidth=(uint32_t)((float)imageWidth * zoom);
    displayHeight=(uint32_t)((float)imageHeight * zoom);
    return true;
}

/**
    \fn baseInit
*/
bool VideoRenderBase::baseInit(uint32_t w, uint32_t h, float zoom)
{
        imageWidth=w;
        imageHeight=h;
        currentZoom=zoom;
        calcDisplayFromZoom(zoom);
        return true;
}

/**
 * \fn renderClearInstance
 * \brief warn render that the renderer has been deleted by low level (window manager)
 * Would be prettier to do it with refCounting
 * @return 
 */
bool renderClearInstance(void)
{
    renderer=NULL;
    return true;
}

//EOF
