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--- sdl_app [2017/09/01 15:56]
1.241.172.144 created
+++ sdl_app [2017/09/01 16:00] (current)
1.241.172.144
@@ Line 2: / Line 2: @@
 Key Pad 를 이용해  image file 을 읽어 화면에 출력 하거나 그림을 그리고 글자를 출력한다.
+한글을 사용하기 위해서는  UTF-8로 작성되어야 한다.
 TODO : Touch screen
 Source Code
+  /*	Application Action
+  Key		: Test Action
+  F1		: make Blue Screen
+  F2		: Display VI_logo.bmp
+  F3		: Display String..
+  F4		: Clear Screen
+  ENTER	: Exit App
+  */
+  #include	<stdio.h>
+  #include	<stdint.h>
+  #include	<string.h>		/* for memset */
+  #include	<unistd.h>		/* for open/close .. */
+  #include	<fcntl.h>		/* for O_RDWR */
+  #include	<sys/ioctl.h>	/* for ioctl */
+  #include	<sys/mman.h>	/* for mmap */
+  #include	<linux/fb.h>	/* for fb_var_screeninfo, FBIOGET_VSCREENINFO */
+  #include	<linux/input.h>
+  #include	<poll.h>
+  #include	"SDL.h"
+  #include	"SDL_ttf.h"
+  #define	DEV_LCD_BACKLIGHT			"/sys/class/backlight/backlight/brightness"
+  #define	TEST_IMAGE_FILE_1			"VI_logo_320_240_R90.jpg"
+  #define	TEST_IMAGE_FILE_2			"VI_logo_320_240_R270.jpg"
+  #define	TEST_FONT_FILE				"D2Coding.ttf"
+  #define	TEST_DISPLAY_STRING			"밸류이노베이션"
+  //#define	TEST_DISPLAY_STRING			"VI"
+  /*
+  #define	DEBUG_LOW_LEVEL_KEY_INPUT_INFO
+  */
+  int	sdl_copy_surface( SDL_Surface *pDestination, int X, int Y, SDL_Surface *pSource )
+  {
+  	int			Result;
+  	SDL_Rect	Offset;	/* Make a temporary rectangle to hold the offsets */
+  	Result = -1;
+  	if ( ( pDestination != (SDL_Surface *)0 )
+  	 &&	( pSource != (SDL_Surface *)0 ) )
+  	{
+  		/* Give the offsets to the rectangle */
+  		Offset.x = X;
+  		Offset.y = Y;
+  		/* Blit the surface */
+  		Result = SDL_BlitSurface( pSource, NULL, pDestination, &Offset );
+  	}
+  	return	Result;
+  }
+  int	sdl_clear_surface( SDL_Surface *pDestination )
+  {
+  	if ( pDestination != (SDL_Surface *)0 )
+  	{
+  		if ( SDL_FillRect(pDestination, NULL, SDL_MapRGB(pDestination->format, 0, 0, 0)) < 0)
+  		{
+  			printf("clear surface fail! : %s\n", SDL_GetError());
+  		}
+  		else
+  		{
+  			printf("clear surface OK\n");
+  			SDL_Flip( pDestination );
+  		}
+  	}
+  }
+  int	bright_set(const uint8_t Brightness)
+  {
+  	FILE *	pDeviceFile;
+  	char	pString[10] = {0};
+  	int		StringLength;
+  	pDeviceFile = fopen(DEV_LCD_BACKLIGHT, "w+");
+  	if ( pDeviceFile == (FILE *)0 )
+  	{
+  		printf("failed to open back light device : %s\n", DEV_LCD_BACKLIGHT);
+  		return	-1;
+  	}
+  	sprintf(pString, "%d", Brightness);
+  	StringLength = (int)strlen(pString);
+  	if ( fwrite(pString, StringLength, 1, pDeviceFile) < 0 )
+  	{
+  		return	-1;
+  	}
+  	fclose(pDeviceFile);
+  	return	0;
+  }
+  int bright_get(uint8_t *pBrightness)
+  {
+  	FILE *	pDeviceFile;
+  	char	pCommand[128] = {0};
+  	char	pString[10] = {0};
+  	char buf[10] = {0};
+  	int level = 0;
+  	if ( pBrightness == (uint8_t *)0 )
+  	{
+  		printf("bright_get : Input Parameter error\n");
+  		return	-1;
+  	}
+  	sprintf(pCommand, "cat %s", DEV_LCD_BACKLIGHT);
+  	pDeviceFile = popen(pCommand, "r");
+  	if ( pDeviceFile == (FILE *)0 )
+  	{
+  		return	-1;
+  	}
+  	while( fgets(pString, 10, pDeviceFile) );
+  	*pBrightness = (uint8_t)strtoul(pString, NULL, 10);
+  	fclose(pDeviceFile);
+  	return	0;
+  }
+  int	main()
+  {
+  	SDL_Surface *	pScreen;
+  	SDL_Event		Event;
+  	char *			pGetENV;
+  #if	1
+  	pGetENV = SDL_getenv("SDL_VIDEODRIVER");
+  	if( pGetENV == (char *)0 )
+  	{
+  		printf("No ENV!\n");
+  		SDL_putenv("SDL_VIDEODRIVER=directfb");
+  	}
+  //	else
+  //	{
+  		printf("SDL_VIDEODRIVER=%s\n",SDL_getenv("SDL_VIDEODRIVER"));
+  //	}
+  #endif
+  	if ( SDL_Init(SDL_INIT_VIDEO) < 0)
+  	{
+  		printf("SDL initialized Fail! : %s\n", SDL_GetError());
+  		return	-1;
+  	}
+  	else
+  	{
+  		printf("SDL initialized OK!\n");
+  	}
+  	pScreen = SDL_SetVideoMode(240, 320, 32, SDL_SWSURFACE);
+  	if( pScreen == (SDL_Surface *)0 )
+  	{
+  		printf("Fail to SetVideoMode !\n");
+  	}
+  	else
+  	{
+  		SDL_KeyboardEvent *	pKeyEvent;
+  		int					IsInLoop;
+  		uint8_t				Brightness;
+  		printf("Screen SDL SetVideoMode OK\n");
+  		printf("SDL Surface Address = 0x%X(%d)\n", (uint32_t)pScreen, (uint32_t)pScreen);
+  		printf("  flags          : 0x%08X\n", pScreen->flags);
+  //		SDL_PixelFormat *format;		/**< Read-only */
+  		printf("  w              : %d\n", pScreen->w);
+  		printf("  h              : %d\n", pScreen->h);
+  		printf("  pitch          : %d\n", pScreen->pitch);
+  		printf("  *pixels        : 0x%X(%d)\n", (uint32_t)pScreen->pixels, (uint32_t)pScreen->pixels);
+  		printf("  offset         : 0x%X(%d)\n", (uint32_t)pScreen->offset, (uint32_t)pScreen->offset);
+  //		struct private_hwdata *hwdata;		/** Hardware-specific surface info */
+  		/** clipping information */
+  //		SDL_Rect clip_rect;			/**< Read-only */
+  		/** Allow recursive locks */
+  		printf("  locked         : 0x%X(%d)\n", (uint32_t)pScreen->locked, (uint32_t)pScreen->locked);
+  		Uint32 locked;				/**< Private */
+  		/** info for fast blit mapping to other surfaces */
+  //		struct SDL_BlitMap *map;		/**< Private */
+  		/** format version, bumped at every change to invalidate blit maps */
+  		printf("  format_version : 0x%X(%d)\n", (uint32_t)pScreen->format_version, (uint32_t)pScreen->format_version);
+  		/** Reference count -- used when freeing surface */
+  		printf("  refcount       : 0x%X(%d)\n", (uint32_t)pScreen->refcount, (uint32_t)pScreen->refcount);
+  		SDL_ShowCursor(SDL_DISABLE/* SDL_ENABLE or SDL_DISABLE */);
+  		/* Must be clear action before doing other actions.. */
+  		sdl_clear_surface( pScreen );
+  //		SDL_Delay(1000/*ms*/);
+  //		sdl_clear_surface( pScreen );
+  		IsInLoop = 1;
+  		/* Start event loop */
+  		while (IsInLoop)
+  		{
+  			if ( SDL_PollEvent( &Event ) == 0)	/* While there's an event to handle */
+  			{
+  				continue;
+  			}
+  			if ( ( Event.type == SDL_KEYDOWN ) || ( Event.type == SDL_KEYUP ) )
+  			{	/* Keys pressed or reased */
+  				pKeyEvent = (SDL_KeyboardEvent *)&Event;
+  				switch ( pKeyEvent->keysym.sym )
+  				{
+  				case	SDLK_BACKSPACE:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - BACKSPACE\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - BACKSPACE\n");
+  					}
+  					break;
+  				case	SDLK_RETURN:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - RETURN\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - RETURN\n");
+  						IsInLoop = 0;
+  					}
+  					break;
+  				case	SDLK_0:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 0\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 0\n");
+  					}
+  					break;
+  				case	SDLK_1:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 1\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 1\n");
+  					}
+  					break;
+  				case	SDLK_2:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 2\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 2\n");
+  					}
+  					break;
+  				case	SDLK_3:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 3\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 3\n");
+  					}
+  					break;
+  				case	SDLK_4:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 4\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 4\n");
+  					}
+  					break;
+  				case	SDLK_5:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 5\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 5\n");
+  					}
+  					break;
+  				case	SDLK_6:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 6\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 6\n");
+  					}
+  					break;
+  				case	SDLK_7:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 7\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 7\n");
+  					}
+  					break;
+  				case	SDLK_8:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 8\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 8\n");
+  					}
+  					break;
+  				case	SDLK_9:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - 9\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - 9\n");
+  					}
+  					break;
+  				case	SDLK_F1:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F1\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - F1\n");
+  						if ( SDL_FillRect(pScreen, NULL, SDL_MapRGB(pScreen->format, 255/*B*/, 0/*G*/, 0/*R*/)) < 0)
+  						{
+  							printf("SDL_FillRect Fail! : %s\n", SDL_GetError());
+  						}
+  						else
+  						{
+  							printf("SDL_FillRect OK\n");
+  							SDL_Flip( pScreen );
+  						}
+  					}
+  					break;
+  				case	SDLK_F2:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F2\n");
+  					}
+  					else
+  					{
+  						SDL_Surface *	pBMP;
+  						printf("SDL Event Keys release! - F2\n");
+  						pBMP = SDL_LoadBMP("logo.bmp");
+  						if( pBMP == (SDL_Surface *)0 )
+  						{
+  							printf("Fail to SDL_LoadBMP !\n");
+  						}
+  						else
+  						{
+  							printf("BMP SDL LoadBMP OK\n");
+  							printf("BMP Surface Address = 0x%X(%d)\n", (uint32_t)pBMP, (uint32_t)pBMP);
+  							printf("  flags          : 0x%08X\n", pBMP->flags);
+  						//	SDL_PixelFormat *format;		/**< Read-only */
+  							printf("  w              : %d\n", pBMP->w);
+  							printf("  h              : %d\n", pBMP->h);
+  							printf("  pitch          : %d\n", pBMP->pitch);
+  							printf("  *pixels        : 0x%X(%d)\n", (uint32_t)pBMP->pixels, (uint32_t)pBMP->pixels);
+  							printf("  offset         : 0x%X(%d)\n", (uint32_t)pBMP->offset, (uint32_t)pBMP->offset);
+  						//	struct private_hwdata *hwdata;		/** Hardware-specific surface info */
+  							/** clipping information */
+  						//	SDL_Rect clip_rect;			/**< Read-only */
+  							/** Allow recursive locks */
+  							printf("  locked         : 0x%X(%d)\n", (uint32_t)pBMP->locked, (uint32_t)pBMP->locked);
+  							Uint32 locked;				/**< Private */
+  							/** info for fast blit mapping to other surfaces */
+  						//	struct SDL_BlitMap *map;		/**< Private */
+  							/** format version, bumped at every change to invalidate blit maps */
+  							printf("  format_version : 0x%X(%d)\n", (uint32_t)pBMP->format_version, (uint32_t)pBMP->format_version);
+  							/** Reference count -- used when freeing surface */
+  							printf("  refcount       : 0x%X(%d)\n", (uint32_t)pBMP->refcount, (uint32_t)pBMP->refcount);
+  						//	SDL_BlitSurface( pBMP, NULL, pScreen, NULL );
+  							sdl_copy_surface( pScreen, 0/*X*/, 0/*Y*/, pBMP );
+  						    // 화면을 갱신
+  							SDL_Flip( pScreen );
+  							SDL_FreeSurface( pBMP );
+  						}
+  					}
+  					break;
+  				case	SDLK_F3:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F3\n");
+  					}
+  					else
+  					{
+  						SDL_Surface *	pText;
+  						TTF_Font *		pFont;
+  						SDL_Color		pTextColor = { 255, 255, 255 };	/* The color of the font */
+  						printf("SDL Event Keys release! - F3\n");
+  						if( TTF_Init() < 0 )
+  						{
+  							printf("Fail to TTF_Init !\n");
+  						}
+  						else
+  						{
+  							printf("OK to TTF_Init !\n");
+  							/* Open the font */
+  							pFont = TTF_OpenFont( TEST_FONT_FILE, 28 );
+  						    /* If there was an error in loading the font */
+  						    if( pFont == (TTF_Font *)0 )
+  						    {
+  								printf("Fail to TTF_OpenFont !\n");
+  						    }
+  							else
+  							{
+  								printf("OK to TTF_OpenFont !\n");
+  								/* 한글 출력을 위해 TTF_RenderUTF8_Solid 사용 */
+  								/* For display HanGul using TTF_RenderUTF8_Solid */
+  								pText = TTF_RenderUTF8_Solid( pFont, TEST_DISPLAY_STRING, pTextColor );	/* Render the text */
+  /*
+  TTF_RenderText_Solid	  	Draw LATIN1 text in solid mode
+  TTF_RenderUTF8_Solid	  	Draw UTF8 text in solid mode
+  TTF_RenderUNICODE_Solid	  	Draw UNICODE text in solid mode
+  TTF_RenderGlyph_Solid	  	Draw a UNICODE glyph in solid mode
+  */
+  								/* If there was an error in rendering the text */
+  								if( pText == (SDL_Surface *)0 )
+  								{
+  									printf("Fail to TTF_RenderText_Solid !\n");
+  								}
+  								else
+  								{
+  									printf("OK to TTF_RenderText_Solid !\n");
+  									/* Apply the images to the screen */
+  									sdl_copy_surface( pScreen, 0/*X*/, 150/*Y*/, pText );
+  								    /* Update the screen */
+  									SDL_Flip( pScreen );
+  									/* Free the text surface */
+  									SDL_FreeSurface( pText );
+  								}
+  								/* Close the font that was used */
+  								TTF_CloseFont( pFont );
+  							}
+  							/* Quit SDL_ttf */
+  							TTF_Quit();
+  						}
+  					}
+  					break;
+  				case	SDLK_F4:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F4\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - F4\n");
+  						if ( sdl_clear_surface( pScreen ) != 0 )
+  						{
+  							printf("clar scrren fail\n");
+  						}
+  						else
+  						{
+  							printf("clar scrren OK\n");
+  						}
+  					}
+  					break;
+  				case	SDLK_F5:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F5\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - F5\n");
+  					}
+  					break;
+  				case	SDLK_F6:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F6\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - F6\n");
+  						if( Brightness != 7 )
+  						{
+  							Brightness ++;
+  							if( bright_set(Brightness) != 0 )
+  							{
+  								printf("Fail to bright_set\n");
+  							}
+  							printf("bright -\n");
+  						}
+  					}
+  					break;
+  				case	SDLK_F7:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - F7\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - F7\n");
+  						if( Brightness != 0 )
+  						{
+  							Brightness --;
+  							if( bright_set(Brightness) != 0 )
+  							{
+  								printf("Fail to bright_set\n");
+  							}
+  							printf("bright +\n");
+  						}
+  					}
+  					break;
+  				default:
+  					if ( Event.type == SDL_KEYDOWN )
+  					{
+  						printf("SDL Event Keys pressed! - ??\n");
+  					}
+  					else
+  					{
+  						printf("SDL Event Keys release! - ??\n");
+  					}
+  					break;
+  				}
+  #ifdef	DEBUG_LOW_LEVEL_KEY_INPUT_INFO
+  				printf(" The keyboard device index = %d\n", pKeyEvent->which);
+  				printf(" The SDL_PRESSED or SDL_RELEASED = %d\n", pKeyEvent->state);
+  				printf(" hardware specific scancode = %d\n", pKeyEvent->keysym.scancode);
+  				printf(" SDL virtual keysym = %d\n", pKeyEvent->keysym.sym);
+  				printf(" current key modifiers = %d\n", pKeyEvent->keysym.mod);
+  				printf(" translated character = %d\n", pKeyEvent->keysym.unicode);
+  #endif
+  			}
+  			else
+  			{
+  				switch (Event.type)
+  				{
+  				case	SDL_ACTIVEEVENT:	/**< Application loses/gains visibility */
+  					printf("SDL Event Application loses/gains visibility!\n");
+  					break;
+  				case	SDL_KEYDOWN:		/**< Keys pressed */
+  					printf("SDL Event Keys pressed!\n");
+  					break;
+  				case	SDL_KEYUP:			/**< Keys released */
+  					printf("SDL Event Keys released!\n");
+  					break;
+  				case	SDL_MOUSEMOTION:	/**< Mouse moved */
+  					printf("SDL Event Mouse moved!\n");
+  					break;
+  				case	SDL_MOUSEBUTTONDOWN:/**< Mouse button pressed */
+  					printf("SDL Event Mouse button pressed!\n");
+  					break;
+  				case	SDL_MOUSEBUTTONUP:	/**< Mouse button released */
+  					printf("SDL Event Mouse button released!\n");
+  					break;
+  				case	SDL_JOYAXISMOTION:	/**< Joystick axis motion */
+  					printf("SDL Event Joystick axis motion!\n");
+  					break;
+  				case	SDL_JOYBALLMOTION:	/**< Joystick trackball motion */
+  					printf("SDL Event Joystick trackball motion!\n");
+  					break;
+  				case	SDL_JOYHATMOTION:	/**< Joystick hat position change */
+  					printf("SDL Event Joystick hat position change!\n");
+  					break;
+  				case	SDL_JOYBUTTONDOWN:	/**< Joystick button pressed */
+  					printf("SDL Event Joystick button pressed!\n");
+  					break;
+  				case	SDL_JOYBUTTONUP:	/**< Joystick button released */
+  					printf("SDL Event Joystick button released!\n");
+  					break;
+  				case	SDL_QUIT:			/**< User-requested quit */
+  					printf("SDL Event User-requested quit!\n");
+  					break;
+  				case	SDL_SYSWMEVENT:		/**< System specific event */
+  					printf("SDL Event System specific!\n");
+  					break;
+  				case	SDL_EVENT_RESERVEDA:/**< Reserved for future use.. */
+  					printf("SDL Event reserved!\n");
+  					break;
+  				case	SDL_EVENT_RESERVEDB:/**< Reserved for future use.. */
+  					printf("SDL Event reserved!\n");
+  					break;
+  				case	SDL_VIDEORESIZE:	/**< User resized video mode */
+  					printf("SDL Event User resized video mode!\n");
+  					break;
+  				case	SDL_VIDEOEXPOSE:	/**< Screen needs to be redrawn */
+  					printf("SDL Event Screen needs to be redrawn!\n");
+  					break;
+  				case	SDL_EVENT_RESERVED2:/**< Reserved for future use.. */
+  				case	SDL_EVENT_RESERVED3:/**< Reserved for future use.. */
+  				case	SDL_EVENT_RESERVED4:/**< Reserved for future use.. */
+  				case	SDL_EVENT_RESERVED5:/**< Reserved for future use.. */
+  				case	SDL_EVENT_RESERVED6:/**< Reserved for future use.. */
+  				case	SDL_EVENT_RESERVED7:/**< Reserved for future use.. */
+  					printf("SDL Event reserved!\n");
+  					break;
+  				case	SDL_USEREVENT:
+  					printf("SDL Event user!\n");
+  					break;
+  				default:
+  					printf("SDL Event unknown!\n");
+  					break;
+  				}
+  			}
+  		}
+  		SDL_FreeSurface( pScreen );
+  	}
+  	SDL_Quit();
+  	return	0;
+  }
+make

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