mpv/Gui/bitmap.c

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

#include "bitmap.h"

int conv24to32( txSample * bf )
{
 unsigned char * tmpImage;
 int             i,c;

 if ( bf->BPP == 24 )
  {
   tmpImage=bf->Image;
   bf->ImageSize=bf->Width * bf->Height * 4;
   bf->BPP=32;
   if ( ( bf->Image=malloc( bf->ImageSize ) ) == NULL )
    {
     mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[bitmap] Not enough memory for image.\n" );
     return 1;
    }
   memset( bf->Image,0,bf->ImageSize );
   for ( c=0,i=0;i < (int)(bf->Width * bf->Height * 3); )
    {
#ifndef WORDS_BIGENDIAN
     bf->Image[c++]=tmpImage[i++];	//red
     bf->Image[c++]=tmpImage[i++];	//green
     bf->Image[c++]=tmpImage[i++]; c++;	//blue
#else
     unsigned char t=tmpImage[i++];
     bf->Image[c++]=tmpImage[i++];	//green
     bf->Image[c++]=t;             c++;	//red
     bf->Image[c++]=tmpImage[i++]; 	//blue
#endif
    }
   free( tmpImage );
  }
 return 0;
}

void bgr2rgb( txSample * bf )
{
 unsigned char c;
 int           i;

 for ( i=0;i < (int)bf->ImageSize;i+=4 )
  {
   c=bf->Image[i];
   bf->Image[i]=bf->Image[i+2];
   bf->Image[i+2]=c;
  }
}

void Normalize( txSample * bf )
{
 int           i;
#ifndef WORDS_BIGENDIAN 
 for ( i=0;i < (int)bf->ImageSize;i+=4 ) bf->Image[i+3]=0;
#else
 for ( i=0;i < (int)bf->ImageSize;i+=4 ) bf->Image[i]=0; 
#endif
}

unsigned char tmp[512];

unsigned char * fExist( unsigned char * fname )
{
 FILE          * fl;
 unsigned char   ext[][6] = { ".png\0",".PNG\0" };
 int             i;

 fl=fopen( fname,"rb" );
 if ( fl != NULL )
  {
   fclose( fl );
   return fname;
  }
 for ( i=0;i<2;i++ )
  {
   sprintf( tmp,"%s%s",fname,ext[i] );
   fl=fopen( tmp,"rb" );
   if ( fl != NULL )
    {
     fclose( fl );
     return tmp;
    }
  }
 return NULL;
}

int bpRead( char * fname, txSample * bf )
{
 fname=fExist( fname );
 if ( fname == NULL ) return -2;
 if ( pngRead( fname,bf ) ) 
  {
   mp_dbg( MSGT_GPLAYER,MSGL_FATAL,"[bitmap] Unknown file type ( %s ).\n",fname );
   return -5;
  }
 if ( bf->BPP < 24 )
  {
   mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[bitmap] sorry, 16 or less bitmaps not supported.\n" );
   return -1;
  }
 if ( conv24to32( bf ) ) return -8;
 bgr2rgb( bf );
 Normalize( bf );
 return 0;
}

void Convert32to1( txSample * in,txSample * out,int adaptivlimit )
{
 out->Width=in->Width;
 out->Height=in->Height;
 out->BPP=1;
 out->ImageSize=out->Width * out->Height / 8;
 mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[c1to32] imagesize: %d\n",out->ImageSize );
 out->Image=(char *)calloc( 1,out->ImageSize );
 if ( out->Image == NULL ) mp_msg( MSGT_GPLAYER,MSGL_STATUS,"nem van ram baze\n" );
 {
  int i,b,c=0; unsigned int * buf = NULL; unsigned char tmp = 0; int nothaveshape = 1;
  buf=(unsigned int *)in->Image;
  for ( b=0,i=0;i < (int)(out->Width * out->Height);i++ )
   {
    if ( (int)buf[i] != adaptivlimit ) tmp=( tmp >> 1 )|128;
     else { tmp=tmp >> 1; buf[i]=nothaveshape=0; }
    if ( b++ == 7 ) { out->Image[c++]=tmp; tmp=b=0; }
   }
  if ( b ) out->Image[c]=tmp;
  if ( nothaveshape ) { free( out->Image ); out->Image=NULL; }
 }
}

void Convert1to32( txSample * in,txSample * out )
{
 if ( in->Image == NULL ) return;
 out->Width=in->Width;
 out->Height=in->Height;
 out->BPP=32;
 out->ImageSize=out->Width * out->Height * 4;
 out->Image=(char *)calloc( 1,out->ImageSize );
 mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[c32to1] imagesize: %d\n",out->ImageSize );
 if ( out->Image == NULL ) mp_msg( MSGT_GPLAYER,MSGL_STATUS,"nem van ram baze\n" );
 {
  int i,b,c=0; unsigned int * buf = NULL; unsigned char tmp = 0;
  buf=(unsigned int *)out->Image;
  for ( c=0,i=0;i < (int)(in->Width * in->Height / 8);i++ )
   {
    tmp=in->Image[i];
    for ( b=0;b<8;b++ )
     {
      buf[c]=0;
      if ( tmp&0x1 ) buf[c]=0xffffffff;
      c++; tmp=tmp>>1;
     }
   }
 }
}