dxtools.cpp

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//----------------------------------------------------------------------------
// 文件名: DXTools.cpp
//
// 描述：用于DX工具库实现
//
// 作者：朱波		创建日期：2007-03-21
//----------------------------------------------------------------------------

#define WIN32_LEAN_AND_MEAN

#include <windows.h>   // include important windows stuff
#include <windowsx.h> 
#include <mmsystem.h>
#include <iostream.h> // include important C/C++ stuff
#include <conio.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <math.h>
#include <io.h>
#include <fcntl.h>
#include <sys/timeb.h>
#include <time.h>

#include <ddraw.h>
#include <dsound.h>
#include "dxtools.h"

LPDIRECTDRAW7         lpdd = NULL;   // dd object
LPDIRECTDRAWSURFACE7  lpddsprimary = NULL;   // dd primary surface
LPDIRECTDRAWSURFACE7  lpddsback = NULL;   // dd back surface
LPDIRECTDRAWPALETTE   lpddpal = NULL;   // a pointer to the created dd palette
LPDIRECTDRAWCLIPPER   lpddclipper = NULL;   // dd clipper
PALETTEENTRY          palette[256];          // color palette
PALETTEENTRY          save_palette[256];     // used to save palettes
DDSURFACEDESC2        ddsd;                  // a direct draw surface description struct
DDBLTFX               ddbltfx;               // used to fill
DDSCAPS2              ddscaps;               // a direct draw surface capabilities struct
HRESULT               ddrval;                // result back from dd calls
DWORD                 start_clock_count = 0; // used for timing

BITMAP_FILE           bitmap_temp;                // holds the bitmap

LPDIRECTSOUND		lpds = NULL;           // directsound interface pointer
DSBUFFERDESC		dsbd;           // directsound description
DSCAPS				dscaps;         // directsound caps
HRESULT				dsresult;       // general directsound result
DSBCAPS             dsbcaps;        // directsound buffer caps

LPDIRECTSOUNDBUFFER	lpdsbprimary = NULL,    // you won't need this normally
                    lpdsbsecondary = NULL;  // the sound buffers

WAVEFORMATEX        pcmwf;          // generic waveformat structure

pcm_sound			sound_fx[MAX_SOUNDS];    // the array of secondary sound buffers


HWND                freq_hwnd,      // window handles for controls
                    volume_hwnd,
                    pan_hwnd;

HDC					hdc;
extern HWND			main_window_handle;

int Load_Bitmap_File(BITMAP_FILE_PTR bitmap, char *filename)
{
// this function opens a bitmap file and loads the data into bitmap

int file_handle,  // the file handle
    index;        // looping index

UCHAR   *temp_buffer = NULL; // used to convert 24 bit images to 16 bit
OFSTRUCT file_data;          // the file data information

// open the file if it exists
if ((file_handle = OpenFile(filename,&file_data,OF_READ))==-1)
   return(0);

// now load the bitmap file header
_lread(file_handle, &bitmap->bitmapfileheader,sizeof(BITMAPFILEHEADER));

// test if this is a bitmap file
if (bitmap->bitmapfileheader.bfType!=BITMAP_ID)
   {
   // close the file
   _lclose(file_handle);

   // return error
   return(0);
   } // end if

// now we know this is a bitmap, so read in all the sections

// first the bitmap infoheader

// now load the bitmap file header
_lread(file_handle, &bitmap->bitmapinfoheader,sizeof(BITMAPINFOHEADER));

// now load the color palette if there is one
if (bitmap->bitmapinfoheader.biBitCount == 8)
   {
   _lread(file_handle, &bitmap->palette,MAX_COLORS_PALETTE*sizeof(PALETTEENTRY));

   // now set all the flags in the palette correctly and fix the reversed 
   // BGR RGBQUAD data format
   for (index=0; index < MAX_COLORS_PALETTE; index++)
       {
       // reverse the red and green fields
       int temp_color                = bitmap->palette[index].peRed;
       bitmap->palette[index].peRed  = bitmap->palette[index].peBlue;
       bitmap->palette[index].peBlue = temp_color;
       
       // always set the flags word to this
       bitmap->palette[index].peFlags = PC_NOCOLLAPSE;
       } // end for index

    } // end if

	// finally the image data itself
_lseek(file_handle,-(int)(bitmap->bitmapinfoheader.biSizeImage),SEEK_END);

// now read in the image, if the image is 8 or 16 bit then simply read it
// but if its 24 bit then read it into a temporary area and then convert
// it to a 16 bit image

if (bitmap->bitmapinfoheader.biBitCount==8 || bitmap->bitmapinfoheader.biBitCount==16 || 
    bitmap->bitmapinfoheader.biBitCount==24)
   {
   // delete the last image if there was one
   if (bitmap->buffer)
       free(bitmap->buffer);

   // allocate the memory for the image
   if (!(bitmap->buffer = (UCHAR *)malloc(bitmap->bitmapinfoheader.biSizeImage)))
      {
      // close the file
      _lclose(file_handle);

      // return error
      return(0);
      } // end if

   // now read it in
   _lread(file_handle,bitmap->buffer,bitmap->bitmapinfoheader.biSizeImage);

   } // end if
else
   {
   // serious problem
   return(0);

   } // end else

#if 0
// write the file info out 
printf("\nfilename:%s \nsize=%d \nwidth=%d \nheight=%d \nbitsperpixel=%d \ncolors=%d \nimpcolors=%d",
        filename,
        bitmap->bitmapinfoheader.biSizeImage,
        bitmap->bitmapinfoheader.biWidth,
        bitmap->bitmapinfoheader.biHeight,
		bitmap->bitmapinfoheader.biBitCount,
        bitmap->bitmapinfoheader.biClrUsed,
        bitmap->bitmapinfoheader.biClrImportant);
#endif

// close the file
_lclose(file_handle);

// flip the bitmap
Flip_Bitmap(bitmap->buffer, 
            bitmap->bitmapinfoheader.biWidth*(bitmap->bitmapinfoheader.biBitCount/8), 
            bitmap->bitmapinfoheader.biHeight);

// return success
return(1);

} // end Load_Bitmap_File
///////////////////////////////////////////////////////////

int Unload_Bitmap_File(BITMAP_FILE_PTR bitmap)
{
// this function releases all memory associated with "bitmap"
if (bitmap->buffer)
   {
   // release memory
   free(bitmap->buffer);

   // reset pointer
   bitmap->buffer = NULL;

   } // end if

// return success
return(1);

} // end Unload_Bitmap_File

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

int Flip_Bitmap(UCHAR *image, int bytes_per_line, int height)
{
// this function is used to flip bottom-up .BMP images

UCHAR *buffer; // used to perform the image processing
int index;     // looping index

// allocate the temporary buffer
if (!(buffer = (UCHAR *)malloc(bytes_per_line*height)))
   return(0);

// copy image to work area
memcpy(buffer,image,bytes_per_line*height);

// flip vertically
for (index=0; index < height; index++)
    memcpy(&image[((height-1) - index)*bytes_per_line],
           &buffer[index*bytes_per_line], bytes_per_line);

// release the memory
free(buffer);

// return success
return(1);

} // end Flip_Bitmap

int DSound_Load_WAV(char *filename, int control_flags)
{
// this function loads a .wav file, sets up the directsound 
// buffer and loads the data into memory, the function returns 
// the id number of the sound


HMMIO 			hwav;    // handle to wave file
MMCKINFO		parent,  // parent chunk
                child;   // child chunk
WAVEFORMATEX    wfmtx;   // wave format structure

int	sound_id = -1,       // id of sound to be loaded
	index;               // looping variable

UCHAR *snd_buffer,       // temporary sound buffer to hold voc data
      *audio_ptr_1=NULL, // data ptr to first write buffer 
	  *audio_ptr_2=NULL; // data ptr to second write buffer

DWORD audio_length_1=0,  // length of first write buffer
	  audio_length_2=0;  // length of second write buffer
			
// step one: are there any open id's ?
for (index=0; index < MAX_SOUNDS; index++)
	{	
    // make sure this sound is unused
	if (sound_fx[index].state==SOUND_NULL)
	   {
	   sound_id = index;
	   break;
	   } // end if

	} // end for index

// did we get a free id?
if (sound_id==-1)
	return(-1);

// set up chunk info structure
parent.ckid 	    = (FOURCC)0;
parent.cksize 	    = 0;
parent.fccType	    = (FOURCC)0;
parent.dwDataOffset = 0;
parent.dwFlags		= 0;

// copy data
child = parent;

// open the WAV file