sdl_epocvideo.cpp

SDL库 在进行视频显示程序spcaview安装时必须的库文件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    [e-mail]
*/

/*
    SDL_epocvideo.cpp
    Epoc based SDL video driver implementation

    Markus Mertama
*/



#include "epoc_sdl.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

extern "C" {
#include "SDL_error.h"
#include "SDL_timer.h"
#include "SDL_video.h"
#undef NULL
#include "SDL_pixels_c.h"
#include "SDL.h"
#include "SDL_mouse.h"
}

#include "SDL_epocvideo.h"
#include "SDL_epocevents_c.h"



#include <coedef.h>
#include <flogger.h>

#include <eikenv.h>
#include <eikappui.h>
#include <eikapp.h>
#include "sdlepocapi.h"


////////////////////////////////////////////////////////////////




_LIT(KLibName, "SDL");

void RDebug_Print_b(char* error_str, void* param)
    {
    TBuf8<128> error8((TUint8*)error_str);
    TBuf<128> error;
    error.Copy(error8);

#ifndef TRACE_TO_FILE
    if (param) //!! Do not work if the parameter is really 0!!
        RDebug::Print(error, param);
    else 
        RDebug::Print(error);
#else
    if (param) //!! Do not work if the parameter is really 0!!
        RFileLogger::WriteFormat(KLibName, _L("SDL.txt"), EFileLoggingModeAppend, error, param);
    else 
        RFileLogger::Write(KLibName, _L("SDL.txt"), EFileLoggingModeAppend, error);
#endif

    }

extern "C" void RDebug_Print(char* error_str, void* param)
    {
    RDebug_Print_b(error_str, param);
    }

/*
int Debug_AvailMem2()
    {
    //User::CompressAllHeaps();
    TMemoryInfoV1Buf membuf; 
    User::LeaveIfError(UserHal::MemoryInfo(membuf));
    TMemoryInfoV1 minfo = membuf();
	return(minfo.iFreeRamInBytes);
    }

extern "C" int Debug_AvailMem()
    {
    return(Debug_AvailMem2());
    }
    
*/

extern "C" {

/* Initialization/Query functions */

static int EPOC_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Rect **EPOC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
static SDL_Surface *EPOC_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static int EPOC_SetColors(_THIS, int firstcolor, int ncolors,
			  SDL_Color *colors);
static void EPOC_VideoQuit(_THIS);

/* Hardware surface functions */

static int EPOC_AllocHWSurface(_THIS, SDL_Surface *surface);
static int EPOC_LockHWSurface(_THIS, SDL_Surface *surface);
static int EPOC_FlipHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_UnlockHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_FreeHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);

static int EPOC_Available(void);
static SDL_VideoDevice *EPOC_CreateDevice(int devindex);

void DrawBackground(_THIS);
void DirectDraw(_THIS, int numrects, SDL_Rect *rects, TUint16* screenBuffer);
void DirectDrawRotated(_THIS, int numrects, SDL_Rect *rects, TUint16* screenBuffer);

/* Mouse functions */

static WMcursor *EPOC_CreateWMCursor(_THIS, Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);
static void EPOC_FreeWMCursor(_THIS, WMcursor *cursor);
static int EPOC_ShowWMCursor(_THIS, WMcursor *cursor);
}


extern "C"
	{
	struct WMcursor
		{
		};
	}

/* Epoc video driver bootstrap functions */


static int EPOC_Available(void)
    {
    return 1; /* Always available */
    }

static void EPOC_DeleteDevice(SDL_VideoDevice *device)
    {
	User::Free(device->hidden);
	User::Free(device);
    }

static SDL_VideoDevice *EPOC_CreateDevice(int /*devindex*/)
    {
	SDL_VideoDevice *device;

	SDL_TRACE("SDL:EPOC_CreateDevice");

	/* Allocate all variables that we free on delete */
	device = static_cast<SDL_VideoDevice*>(User::Alloc(sizeof(SDL_VideoDevice)));
	if ( device ) 
	    {
		Mem::FillZ(device, (sizeof *device));
		device->hidden = static_cast<struct SDL_PrivateVideoData*>
				(User::Alloc((sizeof *device->hidden)));
	    }
	if ( (device == NULL) || (device->hidden == NULL) )
	    {
		SDL_OutOfMemory();
		if ( device ) {
		User::Free(device);
		}
		return(0);
	}
	Mem::FillZ(device->hidden, (sizeof *device->hidden));

	/* Set the function pointers */
	device->VideoInit = EPOC_VideoInit;
	device->ListModes = EPOC_ListModes;
	device->SetVideoMode = EPOC_SetVideoMode;
	device->SetColors = EPOC_SetColors;
	device->UpdateRects = NULL;
	device->VideoQuit = EPOC_VideoQuit;
	device->AllocHWSurface = EPOC_AllocHWSurface;
	device->CheckHWBlit = NULL;
	device->FillHWRect = NULL;
	device->SetHWColorKey = NULL;
	device->SetHWAlpha = NULL;
	device->LockHWSurface = EPOC_LockHWSurface;
	device->UnlockHWSurface = EPOC_UnlockHWSurface;
	device->FlipHWSurface = EPOC_FlipHWSurface;
	device->FreeHWSurface = EPOC_FreeHWSurface;
	device->SetIcon = NULL;
	device->SetCaption = NULL;
	device->GetWMInfo = NULL;
	device->FreeWMCursor = EPOC_FreeWMCursor;
	device->CreateWMCursor = EPOC_CreateWMCursor;
	device->ShowWMCursor = EPOC_ShowWMCursor;
	device->WarpWMCursor = NULL;
	device->InitOSKeymap = EPOC_InitOSKeymap;
	device->PumpEvents = EPOC_PumpEvents;
	device->free = EPOC_DeleteDevice;

	return device;
}


VideoBootStrap EPOC_bootstrap = {
	"epoc\0\0\0", "EPOC system",
    EPOC_Available, EPOC_CreateDevice
};



void DisableKeyBlocking(_THIS)
    {
    EpocSdlEnv::Request(EpocSdlEnv::EDisableKeyBlocking);
    }

void ConstructWindowL(_THIS)
	{
	SDL_TRACE("SDL:ConstructWindowL");
	DisableKeyBlocking(_this); //disable key blocking
	}
		

int EPOC_VideoInit(_THIS, SDL_PixelFormat *vformat)
	{
    /* Construct Epoc window */

    ConstructWindowL(_this);

    /* Initialise Epoc frame buffer */

  
    const TDisplayMode displayMode = EpocSdlEnv::DisplayMode();

    /* The "best" video format should be returned to caller. */

    vformat->BitsPerPixel 	= TDisplayModeUtils::NumDisplayModeBitsPerPixel(displayMode);
    vformat->BytesPerPixel  = TDisplayModeUtils::NumDisplayModeBitsPerPixel(displayMode) / 8;

    
 //??   Private->iWindow->PointerFilter(EPointerFilterDrag, 0); 

    Private->iScreenPos = TPoint(0, 0);
    
    Private->iRect.x = Private->iScreenPos.iX;
    Private->iRect.y = Private->iScreenPos.iY;
    
    const TSize sz = EpocSdlEnv::WindowSize();
    
    Private->iRect.w = sz.iWidth;
    Private->iRect.h = sz.iHeight;
	Private->iRectPtr = &Private->iRect;

	return(0);
	}


SDL_Rect **EPOC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
	{
	if(flags & SDL_HWSURFACE)
		{
		if(format->BytesPerPixel != 4) //in HW only full color is supported
			return NULL;
		}
	if(flags & SDL_FULLSCREEN)
		{
		return &Private->iRectPtr;
		}
    return (SDL_Rect **)(-1); //everythingisok, unless too small shoes
	}


int EPOC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
	{
	if ((firstcolor+ncolors) > 256)
		return -1;
	TUint32 palette[256];
	const TDisplayMode mode = EpocSdlEnv::DisplayMode();
    if(TDisplayModeUtils::NumDisplayModeColors(mode) == 4096)
        {
	// Set 12 bit palette