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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <png.h>
#include "mp_msg.h"
#include "help_mp.h"
#include "bitmap.h"
int pngRead( unsigned char * fname,txSample * bf )
{
unsigned char header[8];
png_structp png;
png_infop info;
png_infop endinfo;
png_bytep * row_p;
png_bytep palette = NULL;
int color;
png_uint_32 i;
FILE *fp=fopen( fname,"rb" );
if ( !fp )
{
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] file read error ( %s )\n",fname );
return 1;
}
fread( header,1,8,fp );
if ( !png_check_sig( header,8 ) ) return 1;
png=png_create_read_struct( PNG_LIBPNG_VER_STRING,NULL,NULL,NULL );
info=png_create_info_struct( png );
endinfo=png_create_info_struct( png );
png_init_io( png,fp );
png_set_sig_bytes( png,8 );
png_read_info( png,info );
png_get_IHDR( png,info,&bf->Width,&bf->Height,&bf->BPP,&color,NULL,NULL,NULL );
row_p=malloc( sizeof( png_bytep ) * bf->Height );
if ( !row_p )
{
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] not enough memory for row buffer\n" );
return 2;
}
bf->Image=(png_bytep)malloc( png_get_rowbytes( png,info ) * bf->Height );
if ( !bf->Image )
{
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] not enough memory for image buffer\n" );
return 2;
}
for ( i=0; i < bf->Height; i++ ) row_p[i]=&bf->Image[png_get_rowbytes( png,info ) * i];
png_read_image( png,row_p );
free( row_p );
#if 0
if ( color == PNG_COLOR_TYPE_PALETTE )
{
int cols;
png_get_PLTE( png,info,(png_colorp *)&palette,&cols );
}
#endif
if ( color&PNG_COLOR_MASK_ALPHA )
{
if ( color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY_ALPHA ) bf->BPP*=2;
else bf->BPP*=4;
}
else
{
if ( color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY ) bf->BPP*=1;
else bf->BPP*=3;
}
png_read_end( png,endinfo );
png_destroy_read_struct( &png,&info,&endinfo );
if ( fclose( fp ) != 0 )
{
free( bf->Image );
free( palette );
return 1;
}
bf->ImageSize=bf->Width * bf->Height * ( bf->BPP / 8 );
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] filename: %s.\n",fname );
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] size: %dx%d bits: %d\n",bf->Width,bf->Height,bf->BPP );
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] imagesize: %lu\n",bf->ImageSize );
return 0;
}
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); )
{
bf->Image[c++]=tmpImage[i++]; //red
bf->Image[c++]=tmpImage[i++]; //green
bf->Image[c++]=tmpImage[i++]; c++; //blue
}
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++ )
{
snprintf( tmp,511,"%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, only 24 and 32 bpp bitmaps are supported.\n" );
return -1;
}
if ( conv24to32( bf ) ) return -8;
#ifdef WORDS_BIGENDIAN
swab(bf->Image, bf->Image, bf->ImageSize);
#endif
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 + 7) / 8;
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[c32to1] imagesize: %d\n",out->ImageSize );
out->Image=calloc( 1,out->ImageSize );
if ( out->Image == NULL ) mp_msg( MSGT_GPLAYER,MSGL_WARN,MSGTR_NotEnoughMemoryC32To1 );
{
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=calloc( 1,out->ImageSize );
mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[c1to32] imagesize: %d\n",out->ImageSize );
if ( out->Image == NULL ) mp_msg( MSGT_GPLAYER,MSGL_WARN,MSGTR_NotEnoughMemoryC1To32 );
{
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;
}
}
}
}
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