targa.cpp

空战游戏flacon源码

//
//
//
//			TARGA.CPP
//
//
//			Created by Kyle Granger, October 23, 1995
//
//
//
//

#include <windows.h>
#include <stdio.h>
#include "falclib.h"
#include "SmartHeap\Include\shmalloc.h"
#include "SmartHeap\Include\smrtheap.hpp"
#include "targa.h"
#include "ui.h"
#include "F4Thread.h"
#include "f4find.h"

// ALL RESMGR CODE ADDITIONS START HERE
#define _USE_RES_MGR_ 1

#ifndef _USE_RES_MGR_ // DON'T USE RESMGR

	#define UI_HANDLE FILE *
	#define UI_OPEN   fopen
	#define UI_READ   fread
	#define UI_CLOSE  fclose
	#define UI_SEEK   fseek
	#define UI_TELL   ftell

#else // USE RESMGR

	#include "cmpclass.h"
	extern "C"
	{
		#include "codelib\resources\reslib\src\resmgr.h"
	}

	#define UI_HANDLE FILE *
	#define UI_OPEN   RES_FOPEN
	#define UI_READ   RES_FREAD
	#define UI_CLOSE  RES_FCLOSE
	#define UI_SEEK   RES_FSEEK
	#define UI_TELL   RES_FTELL

#endif
// ALL RESMGR CODE ADDITIONS AND END HERE

typedef struct
{
	char Header[12];
	WORD Width;
	WORD Height;
	char Junk[2];
} BOGUS_HEADER;

BOOL LoadTargaFile( char *filename, char **image, BITMAPINFO *bmi )
{
	UI_HANDLE hFile;
	char *data;
	BOGUS_HEADER Targa;
	long bytesToRead;

	hFile = UI_OPEN (filename, "rb");

	if (hFile == NULL) 
		return FALSE;

	// For 15-bit Targa file, skip first 12 bytes.
	if (UI_READ (&Targa,sizeof(BOGUS_HEADER),1,hFile) != 1)
	{
		UI_CLOSE(hFile);
		return NULL;
	}

	// Read in image data
	F4Assert(!(Targa.Width > 3000 || Targa.Height > 3000));

	bytesToRead = Targa.Width * Targa.Height * 2;
	if(!bytesToRead)
		return(NULL);

	data = new char [bytesToRead];
	F4Assert(data);

	if(data == NULL)
		return(NULL);
	if (UI_READ (data, bytesToRead,1,hFile) != 1)
	{
		UI_CLOSE(hFile);
		return NULL;
	}

	UI_CLOSE(hFile);

	*image = data;

	bmi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
	bmi->bmiHeader.biWidth = Targa.Width;
	bmi->bmiHeader.biHeight = Targa.Height;
	bmi->bmiHeader.biPlanes = 1;
	bmi->bmiHeader.biBitCount = 16;
	bmi->bmiHeader.biCompression = BI_RGB;
	bmi->bmiHeader.biSizeImage = 0;
	bmi->bmiHeader.biXPelsPerMeter = 72;
	bmi->bmiHeader.biYPelsPerMeter = 72;
	bmi->bmiHeader.biClrUsed = 0;
	bmi->bmiHeader.biClrImportant = 0;

	return TRUE;
}

BOOL NonResLoadTargaFile( char *filename, char **image, BITMAPINFO *bmi )
{
	HANDLE hFile;
	char buf[16];
	char *data;
	WORD width,height;
	DWORD bytesToRead,bytesread;

	hFile = CreateFile (filename, GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

	if (hFile == INVALID_HANDLE_VALUE) 
	{
		return FALSE;
	}

	if(!ReadFile(hFile,buf,12,&bytesread,NULL))
	{
		CloseHandle(hFile);
		return(FALSE);
	}
	// Read width
	if(!ReadFile(hFile,&width, sizeof (width),&bytesread,NULL))
	{
		CloseHandle(hFile);
		return(FALSE);
	}

	// Read height
	if(!ReadFile(hFile,&height, sizeof (height),&bytesread,NULL))
	{
		CloseHandle(hFile);
		return(FALSE);
	}

	// For 15-bit Targa file, skip last 2 bytes.
	if(!ReadFile(hFile,buf, 2, &bytesread,NULL))
	{
		CloseHandle(hFile);
		return(FALSE);
	}

	// Read in image data
	bytesToRead = width * height * 2;
	data = new char [bytesToRead];
	if(!ReadFile(hFile,data, bytesToRead, &bytesread,NULL))
	{
		CloseHandle(hFile);
		return(FALSE);
	}

	CloseHandle(hFile);

	*image = data;

	bmi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
	bmi->bmiHeader.biWidth = width;
	bmi->bmiHeader.biHeight = height;
	bmi->bmiHeader.biPlanes = 1;
	bmi->bmiHeader.biBitCount = 16;
	bmi->bmiHeader.biCompression = BI_RGB;
	bmi->bmiHeader.biSizeImage = 0;
	bmi->bmiHeader.biXPelsPerMeter = 72;
	bmi->bmiHeader.biYPelsPerMeter = 72;
	bmi->bmiHeader.biClrUsed = 0;
	bmi->bmiHeader.biClrImportant = 0;

	return TRUE;
}