1 files changed, 133 insertions, 0 deletions
diff --git a/Gui/bitmap/png/png.c b/Gui/bitmap/png/png.c
new file mode 100644
index 0000000000..524796bedf
--- /dev/null
+++ b/Gui/bitmap/png/png.c
@@ -0,0 +1,133 @@
+
+#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 ) + raw.Alpha;
+ 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;
+}