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Load_PC1: PC1_uncompress_packbits_file => PackBits_unpack_from_file

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This commit is contained in:
Thomas Bernard 2020-01-18 12:03:22 +01:00
parent 06a0e706b9
commit bd723a9a2c
1 changed files with 3 additions and 44 deletions
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47
src/stformats.c
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@ -35,6 +35,7 @@
#include "misc.h"
#include "gfx2log.h"
#include "gfx2mem.h"
#include "packbits.h"
/**
* @defgroup atarist Atari ST picture formats
@ -442,47 +443,6 @@ void Save_PI1(T_IO_Context * context)
//////////////////////////////////// PC1 ////////////////////////////////////
/// uncompress degas elite compressed stream (PACKBITS)
/// @return 1 for success
/// @return 0 for failure
static int PC1_uncompress_packbits_file(FILE *f, byte * dest)
{
int id = 0;
unsigned count;
byte code, value;
while (id < 32000)
{
if (!Read_byte(f, &code))
return 0;
if (code & 0x80)
{
/// Code is negative :
/// Repeat (1-code) times next byte
count = 257 - code;
if (id + count > 32000)
return 0;
if (!Read_byte(f, &value))
return 0;
while (count-- > 0)
dest[id++] = value;
}
else
{
/// Code is positive :
/// Copy (code+1) bytes
count = code + 1;
if (id + count > 32000)
return 0;
if (!Read_bytes(f, dest + id, count))
return 0;
id += count;
}
}
return 1;
}
//// COMPRESSION d'un buffer selon la méthode PACKBITS ////
static void PC1_compress_packbits(byte * src,byte * dest,int source_size,int * dest_size)
@ -700,10 +660,9 @@ void Load_PC1(T_IO_Context * context)
// Initialisation de la preview
Pre_load(context, width, height, size, FORMAT_PC1, ratio, bpp);
//PC1_uncompress_packbits(buffercomp, bufferdecomp);
if (!PC1_uncompress_packbits_file(file, bufferdecomp))
if (PackBits_unpack_from_file(file, bufferdecomp, 32000) != PACKBITS_UNPACK_OK)
{
GFX2_Log(GFX2_INFO, "PC1_uncompress_packbits_file() failed\n");
GFX2_Log(GFX2_INFO, "PackBits_unpack_from_file() failed\n");
free(bufferdecomp);
fclose(file);
return;