mirror of
https://github.com/mpv-player/mpv
synced 2024-12-30 02:52:10 +00:00
edba49f1b8
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4238 b3059339-0415-0410-9bf9-f77b7e298cf2
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
|
|
#include <stdlib.h>
|
|
|
|
#include "./png.h"
|
|
#include "../../error.h"
|
|
#include <png.h>
|
|
|
|
typedef struct
|
|
{
|
|
unsigned int Width;
|
|
unsigned int Height;
|
|
unsigned int Depth;
|
|
unsigned int Alpha;
|
|
|
|
unsigned int Components;
|
|
unsigned char * Data;
|
|
unsigned char * Palette;
|
|
} pngRawInfo;
|
|
|
|
int pngLoadRawF( FILE *fp,pngRawInfo *pinfo )
|
|
{
|
|
unsigned char header[8];
|
|
png_structp png;
|
|
png_infop info;
|
|
png_infop endinfo;
|
|
png_bytep data;
|
|
png_bytep * row_p;
|
|
png_uint_32 width,height;
|
|
int depth,color;
|
|
png_uint_32 i;
|
|
|
|
if ( !pinfo ) 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,&width,&height,&depth,&color,NULL,NULL,NULL );
|
|
|
|
pinfo->Width=width;
|
|
pinfo->Height=height;
|
|
pinfo->Depth=depth;
|
|
|
|
data=( png_bytep ) malloc( png_get_rowbytes( png,info )*height );
|
|
row_p=( png_bytep * ) malloc( sizeof( png_bytep )*height );
|
|
for ( i=0; i < height; i++ ) row_p[i]=&data[png_get_rowbytes( png,info )*i];
|
|
|
|
png_read_image( png,row_p );
|
|
free( row_p );
|
|
|
|
if ( color == PNG_COLOR_TYPE_PALETTE )
|
|
{
|
|
int cols;
|
|
png_get_PLTE( png,info,( png_colorp * ) &pinfo->Palette,&cols );
|
|
}
|
|
else pinfo->Palette=NULL;
|
|
|
|
if ( color&PNG_COLOR_MASK_ALPHA )
|
|
{
|
|
if ( color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY_ALPHA ) pinfo->Components=2;
|
|
else pinfo->Components=4;
|
|
pinfo->Alpha=8;
|
|
}
|
|
else
|
|
{
|
|
if ( color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY ) pinfo->Components=1;
|
|
else pinfo->Components=3;
|
|
pinfo->Alpha=0;
|
|
}
|
|
pinfo->Data=data;
|
|
|
|
png_read_end( png,endinfo );
|
|
png_destroy_read_struct( &png,&info,&endinfo );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pngLoadRaw( const char * filename,pngRawInfo * pinfo )
|
|
{
|
|
int result;
|
|
FILE *fp=fopen( filename,"rb" );
|
|
|
|
if ( !fp ) return 1;
|
|
result=pngLoadRawF( fp,pinfo );
|
|
if ( fclose( fp ) != 0 )
|
|
{
|
|
if ( result )
|
|
{
|
|
free( pinfo->Data );
|
|
free( pinfo->Palette );
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int pngRead( unsigned char * fname,txSample * bf )
|
|
{
|
|
pngRawInfo raw;
|
|
|
|
if ( pngLoadRaw( fname,&raw ) )
|
|
{
|
|
#ifdef DEBUG
|
|
dbprintf( 4,"[png] file read error ( %s ).\n",fname );
|
|
#endif
|
|
return 1;
|
|
}
|
|
bf->Width=raw.Width;
|
|
bf->Height=raw.Height;
|
|
bf->BPP=( raw.Depth * raw.Components );
|
|
bf->ImageSize=bf->Width * bf->Height * ( bf->BPP / 8 );
|
|
if ( ( bf->Image=malloc( bf->ImageSize ) ) == NULL )
|
|
{
|
|
#ifdef DEBUG
|
|
dbprintf( 4,"[png] Not enough memory for image buffer.\n" );
|
|
#endif
|
|
return 2;
|
|
}
|
|
memcpy( bf->Image,raw.Data,bf->ImageSize );
|
|
free( raw.Data );
|
|
#ifdef DEBUG
|
|
dbprintf( 4,"[png] filename: %s.\n",fname );
|
|
dbprintf( 4,"[png] size: %dx%d bits: %d\n",bf->Width,bf->Height,bf->BPP );
|
|
dbprintf( 4,"[png] imagesize: %lu\n",bf->ImageSize );
|
|
#endif
|
|
return 0;
|
|
}
|