/* vim:expandtab:ts=2 sw=2:
*/
/* Grafx2 - The Ultimate 256-color bitmap paint program
Copyright 2018 Thomas Bernard
Copyright 2011 Pawel Góralski
Copyright 2009 Petter Lindquist
Copyright 2008 Yves Rizoud
Copyright 2008 Franck Charlet
Copyright 2007 Adrien Destugues
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
Grafx2 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
Grafx2 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Grafx2; if not, see
*/
///@file ifformat.c
/// Saving and loading IFF picture formats.
#include
#include
#include "fileformats.h"
#include "loadsavefuncs.h"
#include "io.h"
#include "misc.h"
#include "packbits.h"
#include "gfx2mem.h"
#include "gfx2log.h"
#if defined(WIN32)
#if defined(_MSC_VER)
#define WIN32_BSWAP32 _byteswap_ulong
#else
#define WIN32_BSWAP32 __builtin_bswap32
#endif
#endif
#ifdef __APPLE__
#include
#ifndef be32toh
#define be32toh(x) OSSwapBigToHostInt32(x)
#endif
#endif
//////////////////////////////////// IFF ////////////////////////////////////
/** @defgroup IFF Interchange File Format
* @ingroup loadsaveformats
* Interchange File Format (Electronic Arts)
*
* This is the "native" format of Amiga.
* We support ILBM/PBM/ACBM
* @{
*/
typedef struct
{
word Width;
word Height;
word X_org; // Inutile
word Y_org; // Inutile
byte BitPlanes;
byte Mask; // 0=none, 1=mask, 2=transp color, 3=Lasso
byte Compression; // 0=none, 1=packbits, 2=vertical RLE
byte Pad1; // Inutile
word Transp_col; // transparent color for masking mode 2
byte X_aspect; // Inutile
byte Y_aspect; // Inutile
word X_screen;
word Y_screen;
} T_IFF_Header;
typedef struct
{
byte operation; // 0=normal body, 1=XOR, 2=Long Delta, 3=Short Delta,
// 4=Generalized Long/Short Delta, 5=Byte Vertical Delta,
// 7=short/long vertical delta, 74=Eric Graham's compression
byte mask; // for XOR mode only
word w,h; // for XOR mode only
word x,y; // for XOR mode only
dword abstime;
dword reltime;
byte interleave;
byte pad0;
dword bits;
} T_IFF_AnimHeader;
/// Test if a file is in IFF format
void Test_IFF(FILE * IFF_file, const char *sub_type)
{
char format[4];
char section[4];
dword dummy;
File_error=1;
if (! Read_bytes(IFF_file,section,4))
return;
if (memcmp(section,"FORM",4))
return;
if (! Read_dword_be(IFF_file, &dummy))
return;
// On aurait pu vérifier que ce long est égal à la taille
// du fichier - 8, mais ça aurait interdit de charger des
// fichiers tronqués (et déjà que c'est chiant de perdre
// une partie du fichier il faut quand même pouvoir en
// garder un peu... Sinon, moi je pleure :'( !!! )
if (! Read_bytes(IFF_file,format,4))
return;
if (!memcmp(format,"ANIM",4))
{
dword size;
// An ANIM header: need to check that it encloses an image
do
{
if (! Read_bytes(IFF_file,section,4))
return;
if (memcmp(section,"FORM",4))
return;
if (! Read_dword_be(IFF_file, &size))
return;
if (! Read_bytes(IFF_file,format,4))
return;
if (fseek(IFF_file, size - 4, SEEK_CUR) < 0)
return;
}
while(0 == memcmp(format, "8SVX", 4)); // skip sound frames
}
else if(memcmp(format,"DPST",4) == 0)
{
if (! Read_bytes(IFF_file,section,4))
return;
if (memcmp(section, "DPAH", 4) != 0)
return;
if (! Read_dword_be(IFF_file, &dummy))
return;
fseek(IFF_file, dummy, SEEK_CUR);
if (! Read_bytes(IFF_file,section,4))
return;
if (memcmp(section,"FORM",4))
return;
if (! Read_dword_be(IFF_file, &dummy))
return;
if (! Read_bytes(IFF_file,format,4))
return;
}
if ( memcmp(format,sub_type,4))
return;
// If we reach this part, file is indeed ILBM/PBM or ANIM
File_error=0;
}
void Test_PBM(T_IO_Context * context, FILE * f)
{
(void)context;
Test_IFF(f, "PBM ");
}
void Test_LBM(T_IO_Context * context, FILE * f)
{
(void)context;
Test_IFF(f, "ILBM");
}
void Test_ACBM(T_IO_Context * context, FILE * f)
{
(void)context;
Test_IFF(f, "ACBM");
}
// -- Lire un fichier au format IFF -----------------------------------------
typedef struct T_IFF_PCHG_Palette {
struct T_IFF_PCHG_Palette * Next;
short StartLine;
T_Components Palette[1];
} T_IFF_PCHG_Palette;
/// Skips the current section in an IFF file.
/// This function should be called while the file pointer is right
/// after the 4-character code that identifies the section.
static int IFF_Skip_section(FILE * file)
{
dword size;
if (!Read_dword_be(file,&size))
return 0;
if (size&1)
size++;
if (fseek(file,size,SEEK_CUR))
return 0;
return 1;
}
/// Wait for a specific IFF chunk
static byte IFF_Wait_for(FILE * file, const char * expected_section)
{
// Valeur retournée: 1=Section trouvée, 0=Section non trouvée (erreur)
byte section_read[4];
if (! Read_bytes(file,section_read,4))
return 0;
while (memcmp(section_read,expected_section,4)) // Sect. pas encore trouvée
{
if (!IFF_Skip_section(file))
return 0;
if (! Read_bytes(file,section_read,4))
return 0;
}
return 1;
}
// Les images ILBM sont stockés en bitplanes donc on doit trifouiller les bits pour
// en faire du chunky
///
/// Decodes the color of one pixel from the ILBM line buffer.
/// Planar to chunky conversion
/// @param buffer Planar buffer
/// @param x_pos Position of the pixel in graphic line
/// @param real_line_size Width of one bitplane in memory, in bytes
/// @param bitplanes Number of bitplanes
static dword Get_IFF_color(const byte * buffer, word x_pos, word real_line_size, byte bitplanes)
{
byte shift = 7 - (x_pos & 7);
int address,masked_bit,plane;
dword color=0;
for(plane=bitplanes-1;plane>=0;plane--)
{
address = (real_line_size * plane + x_pos) >> 3;
masked_bit = (buffer[address] >> shift) & 1;
color = (color << 1) + masked_bit;
}
return color;
}
/// chunky to planar
static void Set_IFF_color(byte * buffer, word x_pos, byte color, word real_line_size, byte bitplanes)
{
byte shift = 7 - (x_pos & 7);
int address, plane;
for(plane=0;plane> 3;
buffer[address] |= (color&1) << shift;
color = color >> 1;
}
}
// ----------------------- Afficher une ligne ILBM ------------------------
/// Planar to chunky conversion of a line
/// @param context the IO context
/// @param buffer Planar buffer
/// @param y_pos Current line
/// @param real_line_size Width of one bitplane in memory, in bytes
/// @param bitplanes Number of bitplanes
void Draw_IFF_line(T_IO_Context *context, const byte * buffer, short y_pos, short real_line_size, byte bitplanes)
{
short x_pos;
if (bitplanes > 8)
{
for (x_pos=0; x_posWidth; x_pos++)
{
// Default standard deep ILBM bit ordering:
// saved first -----------------------------------------------> saved last
// R0 R1 R2 R3 R4 R5 R6 R7 G0 G1 G2 G3 G4 G5 G6 G7 B0 B1 B2 B3 B4 B5 B6 B7
dword rgb = Get_IFF_color(buffer, x_pos,real_line_size, bitplanes);
Set_pixel_24b(context, x_pos,y_pos, rgb, rgb >> 8, rgb >> 16); // R is 8 LSB, etc.
}
}
else for (x_pos=0; x_posWidth; x_pos++)
{
Set_pixel(context, x_pos, y_pos, Get_IFF_color(buffer, x_pos,real_line_size, bitplanes));
}
}
/// decode pixels with palette changes per line (copper list:)
static void Draw_IFF_line_PCHG(T_IO_Context *context, const byte * buffer, short y_pos, short real_line_size, byte bitplanes, const T_IFF_PCHG_Palette * PCHG_palettes)
{
const T_IFF_PCHG_Palette * palette;
short x_pos;
palette = PCHG_palettes; // find the palette to use for the line
if (palette == NULL)
return;
while (palette->Next != NULL && palette->Next->StartLine <= y_pos)
palette = palette->Next;
for (x_pos=0; x_posWidth; x_pos++)
{
dword c = Get_IFF_color(buffer, x_pos,real_line_size, bitplanes);
Set_pixel_24b(context, x_pos,y_pos, palette->Palette[c].R, palette->Palette[c].G, palette->Palette[c].B);
}
}
/// Decode a HAM line to 24bits pixels
static void Draw_IFF_line_HAM(T_IO_Context *context, const byte * buffer, short y_pos, short real_line_size, byte bitplanes, const T_IFF_PCHG_Palette * PCHG_palettes)
{
short x_pos;
byte red, green, blue, temp;
const T_Components * palette;
if (PCHG_palettes == NULL)
palette = context->Palette;
else
{
// find the palette to use for the line
while (PCHG_palettes->Next != NULL && PCHG_palettes->Next->StartLine <= y_pos)
PCHG_palettes = PCHG_palettes->Next;
palette = PCHG_palettes->Palette;
}
red = palette[0].R;
green = palette[0].G;
blue = palette[0].B;
if (bitplanes == 6)
{
for (x_pos=0; x_posWidth; x_pos++) // HAM6
{
temp=Get_IFF_color(buffer, x_pos,real_line_size, bitplanes);
switch (temp & 0x30)
{
case 0x10: // blue
blue=(temp&0x0F)*0x11;
break;
case 0x20: // red
red=(temp&0x0F)*0x11;
break;
case 0x30: // green
green=(temp&0x0F)*0x11;
break;
default: // Nouvelle couleur
red=palette[temp].R;
green =palette[temp].G;
blue =palette[temp].B;
}
Set_pixel_24b(context, x_pos,y_pos,red,green,blue);
}
}
else
{
for (x_pos=0; x_posWidth; x_pos++) // HAM8
{
temp=Get_IFF_color(buffer,x_pos,real_line_size, bitplanes);
switch (temp >> 6)
{
case 0x01: // blue
blue= (temp << 2) | ((temp & 0x30) >> 4);
break;
case 0x02: // red
red= (temp << 2) | ((temp & 0x30) >> 4);
break;
case 0x03: // green
green= (temp << 2) | ((temp & 0x30) >> 4);
break;
default: // Nouvelle couleur
red=palette[temp].R;
green =palette[temp].G;
blue =palette[temp].B;
}
Set_pixel_24b(context, x_pos,y_pos,red,green,blue);
}
}
}
/// Decode PBM data
///
/// Supports compressions :
/// - 0 uncompressed
/// - 1 compressed
static void PBM_Decode(T_IO_Context * context, FILE * file, byte compression, word width, word height)
{
byte * line_buffer;
word x_pos, y_pos;
word real_line_size = (width+1)&~1;
switch (compression)
{
case 0: // uncompressed
line_buffer=(byte *)malloc(real_line_size);
for (y_pos=0; ((y_pos127)
{
if(Read_byte(file, &color)!=1)
{
File_error=28;
break;
}
do {
Set_pixel(context, x_pos++,y_pos,color);
}
while(temp_byte++ != 0);
}
else
do
{
if(Read_byte(file, &color)!=1)
{
File_error=29;
break;
}
Set_pixel(context, x_pos++,y_pos,color);
}
while(temp_byte-- > 0);
}
}
break;
default:
GFX2_Log(GFX2_ERROR, "PBM only supports compression type 0 and 1 (not %d)\n", compression);
File_error = 50;
}
}
/// Decode LBM data
///
/// Supports packings :
/// - 0 uncompressed
/// - 1 packbits (Amiga)
/// - 2 Vertical RLE (Atari ST)
static void LBM_Decode(T_IO_Context * context, FILE * file, byte compression, byte Image_HAM,
byte stored_bit_planes, byte real_bit_planes, const T_IFF_PCHG_Palette * PCHG_palettes)
{
int plane;
byte * buffer;
short x_pos, y_pos;
// compute row size
int real_line_size = (context->Width+15) & ~15; // size in bit for one bit plane
int plane_line_size = real_line_size >> 3; // size in byte for one bit plane
int line_size = plane_line_size * stored_bit_planes; // size in byte for all bitplanes
switch(compression)
{
case 0: // uncompressed
buffer = (byte *)GFX2_malloc(line_size);
if (buffer == NULL)
{
File_error=1;
return;
}
for (y_pos=0; ((y_posHeight) && (!File_error)); y_pos++)
{
if (Read_bytes(file,buffer,line_size))
{
if (Image_HAM > 1)
Draw_IFF_line_HAM(context, buffer, y_pos,real_line_size, real_bit_planes, PCHG_palettes);
else if (PCHG_palettes)
Draw_IFF_line_PCHG(context, buffer, y_pos,real_line_size, real_bit_planes, PCHG_palettes);
else
Draw_IFF_line(context, buffer, y_pos,real_line_size, real_bit_planes);
}
else
File_error=21;
}
free(buffer);
break;
case 1: // packbits compression (Amiga)
buffer = (byte *)GFX2_malloc(line_size);
if (buffer == NULL)
{
File_error=1;
return;
}
for (y_pos=0; ((y_posHeight) && (!File_error)); y_pos++)
{
for (x_pos=0; ((x_pos 127 => repeat (257-temp_byte) the next byte
// temp_byte <= 127 => copy (temp_byte + 1) bytes
if(temp_byte == 128) // 128 = NOP !
{
GFX2_Log(GFX2_WARNING, "NOP in packbits stream\n");
}
else if (temp_byte>127)
{
if(Read_byte(file, &color)!=1)
{
File_error=23;
break;
}
do
{
if (x_pos=line_size || !Read_byte(file, &(buffer[x_pos++])))
{
File_error=25;
break;
}
}
while (temp_byte-- > 0);
}
if (!File_error)
{
if (Image_HAM > 1)
Draw_IFF_line_HAM(context, buffer, y_pos,real_line_size, real_bit_planes, PCHG_palettes);
else if (PCHG_palettes)
Draw_IFF_line_PCHG(context, buffer, y_pos,real_line_size, real_bit_planes, PCHG_palettes);
else
Draw_IFF_line(context, buffer, y_pos,real_line_size,real_bit_planes);
}
}
free(buffer);
break;
case 2: // vertical RLE compression (Atari ST)
buffer = (byte *)GFX2_malloc(line_size*context->Height);
if (buffer == NULL)
{
File_error=1;
return;
}
memset(buffer, 0, line_size*context->Height);
for (plane = 0; plane < stored_bit_planes && !File_error; plane++)
{
dword section_size;
word cmd_count;
word cmd;
signed char * commands;
word count;
y_pos = 0; x_pos = 0;
if (!IFF_Wait_for(file, "VDAT"))
{
if (plane == 0) // don't cancel loading if at least 1 bitplane has been loaded
File_error = 30;
break;
}
Read_dword_be(file,§ion_size);
Read_word_be(file,&cmd_count);
cmd_count -= 2;
commands = (signed char *)malloc(cmd_count);
if (!Read_bytes(file,commands,cmd_count))
{
File_error = 31;
break;
}
section_size -= (cmd_count + 2);
for (cmd = 0; cmd < cmd_count && x_pos < plane_line_size && section_size > 0; cmd++)
{
if (commands[cmd] <= 0)
{ // cmd=0 : load count from data, COPY
// cmd < 0 : count = -cmd, COPY
if (commands[cmd] == 0)
{
Read_word_be(file,&count);
section_size -= 2;
}
else
count = -commands[cmd];
while (count-- > 0 && x_pos < plane_line_size && section_size > 0)
{
Read_bytes(file,buffer+x_pos+y_pos*line_size+plane*plane_line_size,2);
section_size -= 2;
if(++y_pos >= context->Height)
{
y_pos = 0;
x_pos += 2;
}
}
}
else if (commands[cmd] >= 1)
{ // cmd=1 : load count from data, RLE
// cmd >1 : count = cmd, RLE
byte data[2];
if (commands[cmd] == 1)
{
Read_word_be(file,&count);
section_size -= 2;
}
else
count = (word)commands[cmd];
if (section_size == 0)
break;
Read_bytes(file,data,2);
section_size -= 2;
while (count-- > 0 && x_pos < plane_line_size)
{
memcpy(buffer+x_pos+y_pos*line_size+plane*plane_line_size,data,2);
if(++y_pos >= context->Height)
{
y_pos = 0;
x_pos += 2;
}
}
}
}
if(cmd < (cmd_count-1) || section_size > 0)
GFX2_Log(GFX2_WARNING, "Early end in VDAT chunk\n");
if (section_size > 0)
fseek(file, (section_size+1)&~1, SEEK_CUR); // skip bytes
free(commands);
}
if (!File_error)
{
for (y_pos = 0; y_pos < context->Height; y_pos++)
{
Draw_IFF_line(context,buffer+line_size*y_pos,y_pos,real_line_size,real_bit_planes);
}
}
free(buffer);
break;
default:
GFX2_Log(GFX2_WARNING, "Unknown IFF compression %d\n", compression);
File_error = 32;
}
}
/// Decode RAST chunk (from Atari ST pictures)
static void RAST_chunk_decode(T_IO_Context * context, FILE * file, dword section_size, T_IFF_PCHG_Palette ** PCHG_palettes)
{
int i;
T_Components palette[16];
T_IFF_PCHG_Palette * prev_pal = NULL;
T_IFF_PCHG_Palette * new_pal = NULL;
// 17 words per palette : 1 for line, 16 for the colors
while (section_size >= 34)
{
word line, value;
Read_word_be(file, &line);
for (i = 0; i < 16; i++)
{
Read_word_be(file, &value); // Decode STE Palette
palette[i].R = ((value & 0x0700) >> 7 | (value & 0x0800) >> 11) * 0x11;
palette[i].G = ((value & 0x0070) >> 3 | (value & 0x0080) >> 7) * 0x11;
palette[i].B = ((value & 0x0007) << 1 | (value & 0x0008) >> 3) * 0x11;
}
section_size -= 34;
if (prev_pal == NULL || (line > prev_pal->StartLine && (0 != memcmp(palette, prev_pal->Palette, sizeof(T_Components)*3))))
{
new_pal = malloc(sizeof(T_IFF_PCHG_Palette) + sizeof(T_Components) * 16);
if (new_pal == NULL)
{
File_error = 2;
return;
}
memcpy(new_pal->Palette, palette, sizeof(T_Components) * 16);
new_pal->StartLine = line;
new_pal->Next = NULL;
if (prev_pal != NULL)
{
prev_pal->Next = new_pal;
prev_pal = new_pal;
}
else if (line == 0)
{
prev_pal = new_pal;
*PCHG_palettes = prev_pal;
}
else // line > 0 && prev_pal == NULL
{
// create a palette for line 0
prev_pal = malloc(sizeof(T_IFF_PCHG_Palette) + sizeof(T_Components) * 16);
if (prev_pal == NULL)
{
File_error = 2;
return;
}
memcpy(prev_pal->Palette, context->Palette, sizeof(T_Components) * 16);
prev_pal->StartLine = 0;
prev_pal->Next = new_pal;
*PCHG_palettes = prev_pal;
prev_pal = new_pal;
}
}
}
}
/// Sets 32 upper colors of EHB palette
static void IFF_Set_EHB_Palette(T_Components * palette)
{
int i, j; /// 32 colors in the palette.
for (i=0; i<32; i++) /// The next 32 colors are the same with values divided by 2
{
j=i+32;
palette[j].R = palette[i].R>>1;
palette[j].G = palette[i].G>>1;
palette[j].B = palette[i].B>>1;
}
}
/// Load IFF picture (PBM/ILBM/ACBM) or animation
void Load_IFF(T_IO_Context * context)
{
FILE * IFF_file;
T_IFF_Header header;
T_IFF_AnimHeader aheader;
char format[4];
char section[4];
byte temp_byte;
dword nb_colors = 0; // number of colors in the CMAP (color map)
dword section_size;
short x_pos;
short y_pos;
short line_size = 0; // Taille d'une ligne en octets
short plane_line_size = 0; // Size of line in bytes for 1 plane
short real_line_size = 0; // Taille d'une ligne en pixels
unsigned long file_size;
dword dummy;
int iff_format = 0;
int plane;
dword AmigaViewModes = 0;
enum PIXEL_RATIO ratio = PIXEL_SIMPLE;
byte * buffer;
byte bpp = 0;
byte Image_HAM = 0;
T_IFF_PCHG_Palette * PCHG_palettes = NULL;
int current_frame = 0;
byte * previous_frame = NULL; // For animations
byte * anteprevious_frame = NULL;
word frame_count = 0;
word frame_duration = 0;
word vdlt_plane = 0; // current plane during Atari ST animation decoding
memset(&aheader, 0, sizeof(aheader));
File_error=0;
if ((IFF_file=Open_file_read(context)))
{
file_size=File_length_file(IFF_file);
// FORM + size(4)
Read_bytes(IFF_file,section,4);
Read_dword_be(IFF_file,&dummy);
Read_bytes(IFF_file,format,4);
if (!memcmp(format,"ANIM",4))
{
// Skip a bit, brother
Read_bytes(IFF_file,section,4);
Read_dword_be(IFF_file,§ion_size);
Read_bytes(IFF_file,format,4);
while (0 == memcmp(format, "8SVX", 4))
{
GFX2_Log(GFX2_DEBUG, "IFF : skip sound %.4s %u bytes\n", format, section_size);
if (fseek(IFF_file, section_size - 4, SEEK_CUR) < 0)
break;
Read_bytes(IFF_file,section,4);
Read_dword_be(IFF_file,§ion_size);
Read_bytes(IFF_file,format,4);
}
}
else if(memcmp(format,"DPST",4)==0)
{
// read DPAH
while (File_error == 0)
{
if (!(Read_bytes(IFF_file,section,4)
&& Read_dword_be(IFF_file,§ion_size)))
File_error = 1;
if (memcmp(section, "FORM", 4) == 0)
{
Read_bytes(IFF_file,format,4);
break;
}
else if (memcmp(section, "DPAH", 4) == 0) // Deluxe Paint Animation Header
{
word version;
Read_word_be(IFF_file, &frame_duration);
Read_word_be(IFF_file, &frame_count);
Read_word_be(IFF_file, &version);
section_size -= 6;
Set_frame_duration(context, (frame_duration * 50) / 3); // convert 1/60th sec to msec
}
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // skip unread bytes
}
}
if (memcmp(format,"ILBM",4) == 0)
iff_format = FORMAT_LBM;
else if(memcmp(format,"PBM ",4) == 0)
iff_format = FORMAT_PBM;
else if(memcmp(format,"ACBM",4) == 0)
iff_format = FORMAT_ACBM;
else
{
GFX2_Log(GFX2_WARNING, "Unknown IFF format '%.4s'\n", format);
File_error=1;
}
{
byte real_bit_planes = 0;
byte stored_bit_planes = 0;
while (File_error == 0
&& Read_bytes(IFF_file,section,4)
&& Read_dword_be(IFF_file,§ion_size))
{
if (memcmp(section, "FORM", 4) == 0)
{
// special
Read_bytes(IFF_file, format, 4);
if (memcmp(format, "VDLT", 4) == 0) // Vertical DeLTa
{ // found in animation produced by DeluxePaint for Atari ST
if (frame_count != 0 && current_frame >= (frame_count - 1))
break; // file contains the Delta from the last frame to the 1st one to allow looping, skip it
real_line_size = (context->Width+15) & ~15;
plane_line_size = real_line_size >> 3; // 8bits per byte
line_size = plane_line_size * real_bit_planes;
if (previous_frame == NULL)
{
previous_frame = calloc(line_size * context->Height,1);
for (y_pos=0; y_posHeight; y_pos++)
{
const byte * pix_p = context->Target_address + y_pos * context->Pitch;
// Dispatch the pixel into planes
for (x_pos=0; x_posWidth; x_pos++)
{
Set_IFF_color(previous_frame+y_pos*line_size, x_pos, *pix_p++, real_line_size, real_bit_planes);
}
}
}
Set_loading_layer(context, ++current_frame);
Set_frame_duration(context, (frame_duration * 50) / 3); // convert 1/60th sec to msec
vdlt_plane = 0;
}
continue;
}
if (memcmp(section, "BMHD", 4) == 0) // BitMap HeaDer
{
if (!((Read_word_be(IFF_file,&header.Width))
&& (Read_word_be(IFF_file,&header.Height))
&& (Read_word_be(IFF_file,&header.X_org))
&& (Read_word_be(IFF_file,&header.Y_org))
&& (Read_byte(IFF_file,&header.BitPlanes))
&& (Read_byte(IFF_file,&header.Mask))
&& (Read_byte(IFF_file,&header.Compression))
&& (Read_byte(IFF_file,&header.Pad1))
&& (Read_word_be(IFF_file,&header.Transp_col))
&& (Read_byte(IFF_file,&header.X_aspect))
&& (Read_byte(IFF_file,&header.Y_aspect))
&& (Read_word_be(IFF_file,&header.X_screen))
&& (Read_word_be(IFF_file,&header.Y_screen))) )
{
File_error = 1;
break;
}
GFX2_Log(GFX2_DEBUG, "IFF BMHD : origin (%u,%u) size %ux%u BitPlanes=%u Mask=%u Compression=%u\n",
header.X_org, header.Y_org, header.Width, header.Height,
header.BitPlanes, header.Mask, header.Compression);
GFX2_Log(GFX2_DEBUG, " Transp_col=#%u aspect ratio %u/%u screen size %ux%u\n",
header.Transp_col, header.X_aspect, header.Y_aspect,
header.X_screen, header.Y_screen);
real_bit_planes = header.BitPlanes;
stored_bit_planes = header.BitPlanes;
if (header.Mask==1)
stored_bit_planes++;
Image_HAM=0;
if (header.X_aspect != 0 && header.Y_aspect != 0)
{
if ((10 * header.X_aspect) <= (6 * header.Y_aspect))
ratio = PIXEL_TALL; // ratio <= 0.6
else if ((10 * header.X_aspect) <= (8 * header.Y_aspect))
ratio = PIXEL_TALL3; // 0.6 < ratio <= 0.8
else if ((10 * header.X_aspect) < (15 * header.Y_aspect))
ratio = PIXEL_SIMPLE; // 0.8 < ratio < 1.5
else
ratio = PIXEL_WIDE; // 1.5 <= ratio
}
bpp = header.BitPlanes;
if (bpp <= 8 && bpp > 0)
{
unsigned int i;
// Set a default grayscale palette : if the
// ILBM/PBM file has no palette, it should be assumed to be a
// Gray scale picture.
if (Config.Clear_palette)
memset(context->Palette,0,sizeof(T_Palette));
nb_colors = 1 << bpp;
for (i = 0; i < nb_colors; i++)
context->Palette[i].R =
context->Palette[i].G =
context->Palette[i].B = (i * 255) / (nb_colors - 1);
}
}
else if (memcmp(section, "ANHD", 4) == 0) // ANimation HeaDer
{
// http://www.textfiles.com/programming/FORMATS/anim7.txt
Read_byte(IFF_file, &aheader.operation);
Read_byte(IFF_file, &aheader.mask);
Read_word_be(IFF_file, &aheader.w);
Read_word_be(IFF_file, &aheader.h);
Read_word_be(IFF_file, &aheader.x);
Read_word_be(IFF_file, &aheader.y);
Read_dword_be(IFF_file, &aheader.abstime);
Read_dword_be(IFF_file, &aheader.reltime);
Read_byte(IFF_file, &aheader.interleave);
Read_byte(IFF_file, &aheader.pad0);
Read_dword_be(IFF_file, &aheader.bits);
section_size -= 24;
if ((aheader.bits & 0xffffffc0) != 0) // invalid ? => clearing
aheader.bits = 0;
if (aheader.operation == 0) // ANHD for 1st frame (BODY)
Set_frame_duration(context, (aheader.reltime * 50) / 3); // convert 1/60th sec to msec
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip remaining bytes
}
else if (memcmp(section, "DPAN", 4) == 0) // Deluxe Paint ANimation
{
word version;
dword flags;
if (section_size >= 8)
{
Read_word_be(IFF_file, &version);
Read_word_be(IFF_file, &frame_count);
Read_dword_be(IFF_file, &flags);
section_size -= 8;
}
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip remaining bytes
}
else if (memcmp(section, "DLTA", 4) == 0) // Animation DeLTA
{
int i, plane;
dword offsets[16];
dword current_offset = 0;
byte * frame;
if (Image_HAM > 1)
{
GFX2_Log(GFX2_WARNING, "HAM animations are not supported\n");
//Verbose_message("Notice", "HAM animations are not supported, loading only first frame"); // TODO: causes an issue with colors
break;
}
if (frame_count != 0 && current_frame >= (frame_count - 1))
break; // some animations have delta from last to first frame
if (previous_frame == NULL)
{
real_line_size = (context->Width+15) & ~15;
plane_line_size = real_line_size >> 3; // 8bits per byte
line_size = plane_line_size * real_bit_planes;
previous_frame = calloc(line_size * context->Height,1);
for (y_pos=0; y_posHeight; y_pos++)
{
const byte * pix_p = context->Target_address + y_pos * context->Pitch;
// Dispatch the pixel into planes
for (x_pos=0; x_posWidth; x_pos++)
{
Set_IFF_color(previous_frame+y_pos*line_size, x_pos, *pix_p++, real_line_size, real_bit_planes);
}
}
// many animations are designed for double buffering
// and delta is against frame n-2
anteprevious_frame = malloc(line_size * context->Height);
memcpy(anteprevious_frame, previous_frame, line_size * context->Height);
}
Set_loading_layer(context, ++current_frame);
Set_frame_duration(context, (aheader.reltime * 50) / 3 ); // convert 1/60th sec in msec
frame = previous_frame;
if(aheader.operation == 5) // Byte Vertical Delta mode
{
if (aheader.interleave != 1)
frame = anteprevious_frame;
for (i = 0; i < 16; i++)
{
if (!Read_dword_be(IFF_file, offsets+i))
{
File_error = 2;
break;
}
current_offset += 4;
}
for (plane = 0; plane < 16; plane++)
{
byte op_count = 0;
if (offsets[plane] == 0)
continue;
if (plane >= real_bit_planes)
{
GFX2_Log(GFX2_WARNING, "IFF : too much bitplanes in DLTA data %u >= %u (frame #%u/%u)\n", plane, real_bit_planes, current_frame + 1, frame_count);
break;
}
while (current_offset < offsets[plane])
{
Read_byte(IFF_file, &op_count);
current_offset++;
}
if (current_offset > offsets[plane])
{
GFX2_Log(GFX2_ERROR, "Loading ERROR in DLTA data\n");
File_error = 2;
break;
}
for (x_pos = 0; x_pos < (context->Width+7) >> 3; x_pos++)
{
byte * p = frame + x_pos + plane * plane_line_size;
y_pos = 0;
Read_byte(IFF_file, &op_count);
current_offset++;
for (i = 0; i < op_count; i++)
{
byte op;
if (y_pos >= context->Height)
{
}
Read_byte(IFF_file, &op);
current_offset++;
if (op == 0)
{ // Same ops
byte countb, datab;
Read_byte(IFF_file, &countb);
Read_byte(IFF_file, &datab);
current_offset += 2;
while(countb > 0 && y_pos < context->Height)
{
if(aheader.bits & 2) // XOR
*p ^= datab;
else // set
*p = datab;
p += line_size;
y_pos++;
countb--;
}
}
else if (op & 0x80)
{ // Uniq Ops
op &= 0x7f;
while (op > 0)
{
byte datab;
Read_byte(IFF_file, &datab);
current_offset++;
if (y_pos < context->Height)
{
if(aheader.bits & 2) // XOR
*p ^= datab;
else // set
*p = datab;
p += line_size;
y_pos++;
}
op--;
}
}
else
{ // skip ops
p += op * line_size;
y_pos += op;
}
}
if (y_pos > context->Height)
{
}
}
}
}
else if(aheader.operation==74)
{
// from sources found on aminet :
// http://aminet.net/package/gfx/conv/unmovie
while (current_offset < section_size)
{
word change_type;
word uni_flag;
word y_size;
word x_size;
word num_blocks;
word offset;
word x_start, y_start;
Read_word_be(IFF_file, &change_type);
current_offset += 2;
if (change_type == 0)
break;
else if (change_type == 1)
{ // "Wall"
Read_word_be(IFF_file, &uni_flag);
Read_word_be(IFF_file, &y_size);
Read_word_be(IFF_file, &num_blocks);
current_offset += 6;
while (num_blocks-- > 0)
{
Read_word_be(IFF_file, &offset);
current_offset += 2;
x_start = offset % plane_line_size;
y_start = offset / plane_line_size;
for (plane = 0; plane < real_bit_planes; plane++)
{
byte * p = frame + plane * plane_line_size;
p += x_start + y_start*line_size;
for (y_pos=0; y_pos < y_size; y_pos++)
{
byte value;
Read_byte(IFF_file, &value);
current_offset++;
if (uni_flag)
*p ^= value;
else
*p = value;
}
p += line_size;
}
}
}
else if (change_type == 2)
{ // "Pile"
Read_word_be(IFF_file, &uni_flag);
Read_word_be(IFF_file, &y_size);
Read_word_be(IFF_file, &x_size);
Read_word_be(IFF_file, &num_blocks);
current_offset += 8;
while (num_blocks-- > 0)
{
Read_word_be(IFF_file, &offset);
current_offset += 2;
x_start = offset % plane_line_size;
y_start = offset / plane_line_size;
for (plane = 0; plane < real_bit_planes; plane++)
{
byte * p = frame + plane * plane_line_size;
p += x_start + y_start*line_size;
for (y_pos=0; y_pos < y_size; y_pos++)
{
for (x_pos=0; x_pos < x_size; x_pos++)
{
byte value;
Read_byte(IFF_file, &value);
current_offset++;
if (uni_flag)
p[x_pos] ^= value;
else
p[x_pos] = value;
}
p += line_size;
}
}
}
}
else
{
GFX2_Log(GFX2_ERROR, "Unknown change type in type 74 DLTA\n");
File_error = 2;
break;
}
if (current_offset & 1) // align to WORD boundary
{
byte junk;
Read_byte(IFF_file, &junk);
current_offset++;
}
}
}
else
{
GFX2_Log(GFX2_INFO, "IFF DLTA : Unsupported compression type %u\n", aheader.operation);
}
if (File_error == 0)
{
for (y_pos=0; y_posHeight; y_pos++)
{
Draw_IFF_line(context, frame+line_size*y_pos,y_pos,real_line_size,real_bit_planes);
}
}
if (aheader.operation == 5 && aheader.interleave != 1)
{
anteprevious_frame = previous_frame;
previous_frame = frame;
}
if (current_offset&1)
{
byte dummy_byte;
Read_byte(IFF_file, &dummy_byte);
current_offset++;
}
section_size -= current_offset;
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip it
}
else if (memcmp(section, "ADAT", 4) == 0)
{ // Animation made with Deluxe Paint for Atari ST
buffer = previous_frame;
if (section_size > 0)
{
byte * p;
byte data[2];
word cmd_count;
word cmd;
signed char * commands;
word count;
y_pos = 0; x_pos = 0;
Read_word_be(IFF_file,&cmd_count);
cmd_count -= 2;
commands = (signed char *)malloc(cmd_count);
if (!Read_bytes(IFF_file,commands,cmd_count))
{
File_error = 31;
break;
}
section_size -= (cmd_count + 2);
for (cmd = 0; cmd < cmd_count && section_size > 0; cmd++)
{
if (commands[cmd] == 0)
{ // move pointer
word offset;
short x_ofs, y_ofs;
Read_word_be(IFF_file,&offset);
section_size -= 2;
if((short)offset < 0) {
y_ofs = ((short)offset - plane_line_size + 1) / plane_line_size;
x_ofs = (short)offset - y_ofs * plane_line_size;
} else {
x_ofs = offset % plane_line_size;
y_ofs = offset / plane_line_size;
}
y_pos += y_ofs;
x_pos += x_ofs;
}
else if(commands[cmd] < 0)
{ // XOR with a string of Words
if (commands[cmd] == -1 && section_size >= 2)
{
Read_word_be(IFF_file,&count);
section_size -= 2;
}
else
count = -commands[cmd] - 1;
while (count-- > 0 && y_pos < context->Height && section_size > 0)
{
p = buffer+x_pos+y_pos*line_size+vdlt_plane*plane_line_size;
Read_bytes(IFF_file,data,2);
section_size -= 2;
p[0] ^= data[0];
p[1] ^= data[1];
y_pos++;
}
}
else // commands[cmd] > 0
{ // XOR a word several times
if (commands[cmd] == 1)
{
Read_word_be(IFF_file,&count);
section_size -= 2;
if (section_size < 2)
break;
}
else
count = commands[cmd] - 1;
Read_bytes(IFF_file,data,2);
section_size -= 2;
do
{
p = buffer+x_pos+y_pos*line_size+vdlt_plane*plane_line_size;
p[0] ^= data[0];
p[1] ^= data[1];
y_pos++;
}
while (count-- > 0 && y_pos < context->Height);
}
}
free(commands);
if(cmd < (cmd_count-1) || section_size > 0)
{
GFX2_Log(GFX2_WARNING, "Early end in ADAT chunk\n");
}
}
vdlt_plane++;
if (vdlt_plane == real_bit_planes)
{
for (y_pos=0; y_posHeight; y_pos++)
{
Draw_IFF_line(context, buffer+line_size*y_pos,y_pos,real_line_size,real_bit_planes);
}
}
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip remaining bytes
}
else if (memcmp(section, "CMAP", 4) == 0) // Colour MAP
{
nb_colors = section_size/3;
if (nb_colors > 256)
{
File_error = 1;
break;
}
GFX2_Log(GFX2_DEBUG, "IFF CMAP : %u colors (header.BitPlanes=%u)\n", nb_colors, header.BitPlanes);
if (current_frame != 0)
GFX2_Log(GFX2_WARNING, "IFF : One CMAP per frame is not supported (frame #%u/%u)\n", current_frame + 1, frame_count);
if ((header.BitPlanes==6 && nb_colors==16) || (header.BitPlanes==8 && nb_colors==64))
{
Image_HAM=header.BitPlanes;
bpp = 3 * (header.BitPlanes - 2); // HAM6 = 12bpp, HAM8 = 18bpp
}
if (Read_bytes(IFF_file,context->Palette,3*nb_colors))
{
section_size -= 3*nb_colors;
if (nb_colors <= 64)
{
unsigned int i;
int is_4bits_colors = 1; // recoil also checks that header.Pad1 is not 0x80
for(i = 0; i < nb_colors && is_4bits_colors; i++)
{
is_4bits_colors = is_4bits_colors && ((context->Palette[i].R & 0x0f) == 0)
&& ((context->Palette[i].G & 0x0f) == 0)
&& ((context->Palette[i].B & 0x0f) == 0);
}
if (is_4bits_colors) // extend 4bits per component color palettes to 8bits per component
for(i = 0; i < nb_colors; i++)
{
context->Palette[i].R |= (context->Palette[i].R >> 4);
context->Palette[i].G |= (context->Palette[i].G >> 4);
context->Palette[i].B |= (context->Palette[i].B >> 4);
}
}
if (((nb_colors==32) || (AmigaViewModes & 0x80)) && (header.BitPlanes==6))
{
IFF_Set_EHB_Palette(context->Palette); // This is a Extra Half-Brite (EHB) 64 color image.
nb_colors = 64;
}
while(section_size > 0) // Read padding bytes
{
if (Read_byte(IFF_file,&temp_byte))
File_error=20;
section_size--;
}
}
else
File_error=1;
if (context->Type == CONTEXT_PALETTE || context->Type == CONTEXT_PREVIEW_PALETTE)
break; // stop once the palette is loaded
}
else if (memcmp(section,"CRNG",4) == 0)
{
// The content of a CRNG is as follows:
word padding;
word rate;
word flags;
byte min_col;
byte max_col;
if ( (Read_word_be(IFF_file,&padding))
&& (Read_word_be(IFF_file,&rate))
&& (Read_word_be(IFF_file,&flags))
&& (Read_byte(IFF_file,&min_col))
&& (Read_byte(IFF_file,&max_col)))
{
GFX2_Log(GFX2_DEBUG, "IFF CRNG : [#%u #%u] rate=%u flags=%04x\n", min_col, max_col, rate, flags);
if (section_size == 8 && min_col != max_col)
{
// Valid cycling range
if (max_colColor_cycles >= 16)
{
GFX2_Log(GFX2_INFO, "IFF CRNG : Maximum CRNG number is 16\n");
}
else
{
word speed;
context->Cycle_range[context->Color_cycles].Start=min_col;
context->Cycle_range[context->Color_cycles].End=max_col;
context->Cycle_range[context->Color_cycles].Inverse=(flags&2)?1:0;
speed = (flags&1) ? rate/78 : 0;
context->Cycle_range[context->Color_cycles].Speed = (speed > COLOR_CYCLING_SPEED_MAX) ? COLOR_CYCLING_SPEED_MAX : speed;
context->Color_cycles++;
}
}
}
else
File_error=47;
}
else if (memcmp(section, "DRNG", 4) == 0) // DPaint IV enhanced color cycle chunk
{
/// @todo DRNG IFF chunk is read, but complex color cycling are not implemented.
// see http://amigadev.elowar.com/read/ADCD_2.1/Devices_Manual_guide/node0282.html
byte min_col;
byte max_col;
word rate;
word flags;
byte ntruecolor;
byte nregs;
Read_byte(IFF_file, &min_col);
Read_byte(IFF_file, &max_col);
Read_word_be(IFF_file, &rate);
Read_word_be(IFF_file, &flags);
Read_byte(IFF_file, &ntruecolor);
Read_byte(IFF_file, &nregs);
section_size -= 8;
GFX2_Log(GFX2_DEBUG, "IFF DRNG : [#%u #%u] rate=%u flags=%04x, %u tc cells, %u reg cells\n", min_col, max_col, rate, flags, ntruecolor, nregs);
while (ntruecolor-- > 0 && section_size > 0)
{
byte cell, r, g, b;
Read_byte(IFF_file, &cell);
Read_byte(IFF_file, &r);
Read_byte(IFF_file, &g);
Read_byte(IFF_file, &b);
section_size -= 4;
GFX2_Log(GFX2_DEBUG, " #%u #%02X%02X%02X\n", cell, r, g, b);
}
while (nregs-- > 0 && section_size > 0)
{
byte cell, index;
Read_byte(IFF_file, &cell);
Read_byte(IFF_file, &index);
section_size -= 2;
GFX2_Log(GFX2_DEBUG, " #%u index %u\n", cell, index);
}
if (section_size > 0)
{
GFX2_Log(GFX2_DEBUG, "IFF DRNG : skipping %u bytes\n", section_size);
fseek(IFF_file, section_size, SEEK_CUR);
}
}
else if (memcmp(section, "CCRT", 4) == 0) // Color Cycling Range and Timing
{
// see http://amigadev.elowar.com/read/ADCD_2.1/Devices_Manual_guide/node01BA.html
word direction;
byte start, end;
dword seconds, microseconds;
word pad;
Read_word_be(IFF_file, &direction);
Read_byte(IFF_file, &start);
Read_byte(IFF_file, &end);
Read_dword_be(IFF_file, &seconds);
Read_dword_be(IFF_file, µseconds);
Read_word_be(IFF_file, &pad);
section_size -= 14;
GFX2_Log(GFX2_DEBUG, "IFF CCRT : dir %04x [#%u #%u] delay %u.%06u\n",
direction, start, end, seconds, microseconds);
if (context->Color_cycles >= 16)
{
GFX2_Log(GFX2_INFO, "IFF CCRT : Maximum CRNG number is 16\n");
}
else if (start != end)
{
// Speed resolution is 0.2856Hz
// Speed = (1000000/delay) / 0.2856 = 3501400 / delay
context->Cycle_range[context->Color_cycles].Start = start;
context->Cycle_range[context->Color_cycles].End = end;
if (direction != 0)
{
dword speed;
context->Cycle_range[context->Color_cycles].Inverse = (~direction >> 15) & 1;
speed = 3501400 / (seconds * 1000000 + microseconds);
context->Cycle_range[context->Color_cycles].Speed = (speed > COLOR_CYCLING_SPEED_MAX) ? COLOR_CYCLING_SPEED_MAX : speed;
}
else
{
context->Cycle_range[context->Color_cycles].Speed = 0;
}
context->Color_cycles++;
}
}
else if (memcmp(section, "DPI ", 4) == 0)
{
word dpi_x, dpi_y;
Read_word_be(IFF_file, &dpi_x);
Read_word_be(IFF_file, &dpi_y);
section_size -= 4;
GFX2_Log(GFX2_DEBUG, "IFF DPI %hu x %hu\n", dpi_x, dpi_y);
}
else if (memcmp(section, "CAMG", 4) == 0) // Amiga Viewport Modes
{
Read_dword_be(IFF_file, &AmigaViewModes); // HIRES=0x8000 LACE=0x4 HAM=0x800 HALFBRITE=0x80
section_size -= 4;
GFX2_Log(GFX2_DEBUG, "CAMG = $%08x\n", AmigaViewModes);
if (AmigaViewModes & 0x800 && (header.BitPlanes == 6 || header.BitPlanes == 8))
{
Image_HAM = header.BitPlanes;
bpp = 3 * (header.BitPlanes - 2);
}
if ((AmigaViewModes & 0x80) && (header.BitPlanes == 6)) // This is a Extra Half-Brite (EHB) 64 color image.
{
IFF_Set_EHB_Palette(context->Palette); // Set the palette in case CAMG is after CMAP
nb_colors = 64;
}
}
else if (memcmp(section, "DPPV", 4) == 0) // DPaint II ILBM perspective chunk
{
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip it
}
else if (memcmp(section, "CLUT", 4) == 0) // lookup table
{
dword lut_type; // 0 = A Monochrome, contrast or intensity LUT
byte lut[256]; // 1 = RED, 2 = GREEN, 3 = BLUE, 4 = HUE, 5 = SATURATION
Read_dword_be(IFF_file, &lut_type);
Read_dword_be(IFF_file, &dummy);
Read_bytes(IFF_file, lut, 256);
section_size -= (4+4+256);
if (section_size > 0)
{
GFX2_Log(GFX2_WARNING, "Extra bytes at the end of CLUT chunk\n");
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
}
else if (memcmp(section, "DYCP", 4) == 0) // DYnamic Color Palette
{
// All files I've seen have 4 words (8bytes) :
// { 0, 1, 16, 0} 16 is probably the number of colors in each palette
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip it
}
else if (memcmp(section, "SHAM", 4) == 0) // Sliced HAM
{
int i;
word version;
dword SHAM_palette_count;
T_IFF_PCHG_Palette * prev_pal = NULL;
T_IFF_PCHG_Palette * new_pal = NULL;
Image_HAM = header.BitPlanes;
bpp = 3 * (header.BitPlanes - 2);
Read_word_be(IFF_file, &version); // always 0
section_size -= 2;
SHAM_palette_count = section_size >> 5; // 32 bytes per palette (16 colors * 2 bytes)
// SHAM_palette_count should be the image height, or height/2 for "interlaced" images
for (y_pos = 0; y_pos < header.Height && section_size >= 32; y_pos += (SHAM_palette_count < header.Height ? 2 : 1))
{
new_pal = GFX2_malloc(sizeof(T_IFF_PCHG_Palette) + nb_colors*sizeof(T_Components));
if (new_pal == NULL)
{
File_error = 1;
break;
}
new_pal->Next = NULL;
new_pal->StartLine = y_pos;
for (i = 0; i < 16; i++)
{
Read_byte(IFF_file, &temp_byte); // 0R
new_pal->Palette[i].R = (temp_byte & 0x0f) * 0x11; // 4 bits to 8 bits
Read_byte(IFF_file, &temp_byte); // GB
new_pal->Palette[i].G = (temp_byte & 0xf0) | (temp_byte >> 4);
new_pal->Palette[i].B = (temp_byte & 0x0f) * 0x11; // 4 bits to 8 bits
section_size -= 2;
}
if (prev_pal != NULL)
prev_pal->Next = new_pal;
else
PCHG_palettes = new_pal;
prev_pal = new_pal;
}
if (section_size > 0)
{
GFX2_Log(GFX2_WARNING, "Extra bytes at the end of SHAM chunk\n");
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
}
else if (memcmp(section, "BEAM", 4) == 0 || memcmp(section, "CTBL", 4) == 0)
{
// One palette per line is stored
if (section_size >= header.Height * nb_colors * 2)
{
T_Palette palette;
T_IFF_PCHG_Palette * prev_pal = NULL;
T_IFF_PCHG_Palette * new_pal = NULL;
for (y_pos = 0; y_pos < header.Height; y_pos++)
{
unsigned int i;
for (i = 0; i < nb_colors; i++)
{
word value;
Read_word_be(IFF_file, &value);
section_size -= 2;
palette[i].R = ((value & 0x0f00) >> 8) * 0x11;
palette[i].G = ((value & 0x00f0) >> 4) * 0x11;
palette[i].B = (value & 0x000f) * 0x11;
}
if (y_pos == 0)
{
prev_pal = GFX2_malloc(sizeof(T_IFF_PCHG_Palette) + nb_colors*sizeof(T_Components));
if (prev_pal == NULL)
{
File_error = 1;
break;
}
prev_pal->Next = NULL;
prev_pal->StartLine = 0;
memcpy(prev_pal->Palette, palette, nb_colors*sizeof(T_Components));
PCHG_palettes = prev_pal;
}
else if (memcmp(palette, prev_pal->Palette, nb_colors*sizeof(T_Components)) != 0)
{
new_pal = GFX2_malloc(sizeof(T_IFF_PCHG_Palette) + nb_colors*sizeof(T_Components));
if (new_pal == NULL)
{
File_error = 1;
break;
}
new_pal->Next = NULL;
new_pal->StartLine = y_pos;
memcpy(new_pal->Palette, palette, nb_colors*sizeof(T_Components));
prev_pal->Next = new_pal;
prev_pal = new_pal;
}
}
if (PCHG_palettes != NULL)
bpp = 12;
}
else
GFX2_Log(GFX2_WARNING, "inconsistent size of BEAM/CTLB chunk, ignoring\n");
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
else if (memcmp(section, "PCHG", 4) == 0) // Palette CHanGes
{
dword * lineBitMask;
int i;
T_IFF_PCHG_Palette * prev_pal = NULL;
T_IFF_PCHG_Palette * curr_pal = NULL;
void * PCHGData = NULL;
// http://wiki.amigaos.net/wiki/ILBM_IFF_Interleaved_Bitmap#ILBM.PCHG
// http://vigna.di.unimi.it/software.php
// Header
word Compression; // 0 = None, 1 = Huffman
word Flags; // 0x1 = SmallLineChanges, 0x2 = BigLineChanges, 0x4 = use alpha
short StartLine; // possibly negative
word LineCount;
word ChangedLines;
word MinReg;
word MaxReg;
word MaxChanges;
dword TotalChanges;
if (!(Read_word_be(IFF_file, &Compression)
&& Read_word_be(IFF_file, &Flags)
&& Read_word_be(IFF_file, (word *)&StartLine)
&& Read_word_be(IFF_file, &LineCount)
&& Read_word_be(IFF_file, &ChangedLines)
&& Read_word_be(IFF_file, &MinReg)
&& Read_word_be(IFF_file, &MaxReg)
&& Read_word_be(IFF_file, &MaxChanges)
&& Read_dword_be(IFF_file, &TotalChanges)))
File_error = 1;
section_size -= 20;
if (Compression)
{
short * TreeCode;
const short * TreeP; //a3
int remaining_bits = 0; //d1
dword src_dword = 0; //d2
byte * dst_data; //a1
dword CompInfoSize;
dword OriginalDataSize; //d0
Read_dword_be(IFF_file, &CompInfoSize);
Read_dword_be(IFF_file, &OriginalDataSize);
section_size -= 8;
// read HuffMan tree
TreeCode = malloc(CompInfoSize);
for (i = 0; i < (int)(CompInfoSize / 2); i++)
Read_word_be(IFF_file, (word *)(TreeCode + i));
section_size -= CompInfoSize;
PCHGData = malloc(OriginalDataSize);
dst_data = PCHGData;
// HuffMan depacking
TreeP = TreeCode+(CompInfoSize/2-1); // pointer to the last element
while (OriginalDataSize > 0)
{
if (--remaining_bits < 0)
{
Read_dword_be(IFF_file, &src_dword);
section_size -= 4;
remaining_bits = 31;
}
if (src_dword & (1 << remaining_bits))
{
if (*TreeP < 0)
{
// OffsetPointer
TreeP += (*TreeP / 2);
continue; // pick another bit
}
}
else
{
// Case0
--TreeP;
if ((*TreeP < 0) || !(*TreeP & 0x100))
continue; // pick another bit
}
// StoreValue
*dst_data = (byte)(*TreeP & 0xff);
dst_data++;
TreeP = TreeCode+(CompInfoSize/2-1); // pointer to the last element
OriginalDataSize--;
}
free(TreeCode);
}
else
{
PCHGData = malloc(section_size);
Read_bytes(IFF_file, PCHGData, section_size);
section_size = 0;
}
if (PCHGData != NULL)
{
const byte * data;
// initialize first palette from CMAP
prev_pal = malloc(sizeof(T_IFF_PCHG_Palette) + nb_colors*sizeof(T_Components));
prev_pal->Next = NULL;
prev_pal->StartLine = 0;
memcpy(prev_pal->Palette, context->Palette, nb_colors*sizeof(T_Components));
PCHG_palettes = prev_pal;
lineBitMask = (dword *)PCHGData;
#if defined(SDL_BYTEORDER) && (SDL_BYTEORDER != SDL_BIG_ENDIAN)
for (i = 0 ; i < ((LineCount + 31) >> 5); i++)
lineBitMask[i] = SDL_Swap32(lineBitMask[i]);
#elif defined(BYTE_ORDER) && (BYTE_ORDER != BIG_ENDIAN)
for (i = 0 ; i < ((LineCount + 31) >> 5); i++)
lineBitMask[i] = be32toh(lineBitMask[i]);
#elif defined(WIN32)
// assume WIN32 is little endian
for (i = 0 ; i < ((LineCount + 31) >> 5); i++)
lineBitMask[i] = WIN32_BSWAP32(lineBitMask[i]);
#endif
data = (const byte *)PCHGData + ((LineCount + 31) >> 5) * 4;
for (y_pos = 0 ; y_pos < LineCount; y_pos++)
{
if (lineBitMask[y_pos >> 5] & (1 << (31-(y_pos & 31))))
{
byte ChangeCount16, ChangeCount32;
word PaletteChange;
if ((y_pos + StartLine) < 0)
curr_pal = PCHG_palettes;
else
{
curr_pal = malloc(sizeof(T_IFF_PCHG_Palette) + nb_colors*sizeof(T_Components));
curr_pal->Next = NULL;
curr_pal->StartLine = StartLine + y_pos;
memcpy(curr_pal->Palette, prev_pal->Palette, nb_colors*sizeof(T_Components));
prev_pal->Next = curr_pal;
}
ChangeCount16 = *data++;
ChangeCount32 = *data++;
for (i = 0; i < ChangeCount16; i++)
{
PaletteChange = data[0] << 8 | data[1]; // Big endian
data += 2;
curr_pal->Palette[(PaletteChange >> 12)].R = ((PaletteChange & 0x0f00) >> 8) * 0x11;
curr_pal->Palette[(PaletteChange >> 12)].G = ((PaletteChange & 0x00f0) >> 4) * 0x11;
curr_pal->Palette[(PaletteChange >> 12)].B = ((PaletteChange & 0x000f) >> 0) * 0x11;
}
for (i = 0; i < ChangeCount32; i++)
{
PaletteChange = data[0] << 8 | data[1]; // Big endian
data += 2;
curr_pal->Palette[16+(PaletteChange >> 12)].R = ((PaletteChange & 0x0f00) >> 8) * 0x11;
curr_pal->Palette[16+(PaletteChange >> 12)].G = ((PaletteChange & 0x00f0) >> 4) * 0x11;
curr_pal->Palette[16+(PaletteChange >> 12)].B = ((PaletteChange & 0x000f) >> 0) * 0x11;
}
if (nb_colors == 64) // Extend the 32 colors decoded to 64
IFF_Set_EHB_Palette(curr_pal->Palette);
prev_pal = curr_pal;
}
}
free(PCHGData);
}
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
if (PCHG_palettes != NULL)
bpp = 12;
}
else if (memcmp(section, "RAST", 4) == 0) // Atari ST
{
if (PCHG_palettes == NULL)
{
RAST_chunk_decode(context, IFF_file, section_size, &PCHG_palettes);
if (PCHG_palettes != NULL)
bpp = 12;
}
else
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR); // Skip
}
else if (memcmp(section, "TINY", 4) == 0)
{
word tiny_width, tiny_height;
Read_word_be(IFF_file,&tiny_width);
Read_word_be(IFF_file,&tiny_height);
section_size -= 4;
// Load thumbnail if in preview mode
if ((context->Type == CONTEXT_PREVIEW || context->Type == CONTEXT_PREVIEW_PALETTE)
&& tiny_width > 0 && tiny_height > 0)
{
context->Original_width = header.Width;
context->Original_height = header.Height;
Pre_load(context, tiny_width, tiny_height,file_size,iff_format,ratio,bpp);
context->Background_transparent = header.Mask == 2;
context->Transparent_color = context->Background_transparent ? header.Transp_col : 0;
if (iff_format == FORMAT_PBM)
PBM_Decode(context, IFF_file, header.Compression, tiny_width, tiny_height);
else
LBM_Decode(context, IFF_file, header.Compression, Image_HAM, stored_bit_planes, real_bit_planes, PCHG_palettes);
fclose(IFF_file);
IFF_file = NULL;
return;
}
else
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
else if (memcmp(section, "ANNO", 4) == 0)
{
dword length;
section_size = (section_size + 1) & ~1;
length = section_size;
if (length > COMMENT_SIZE)
length = COMMENT_SIZE;
Read_bytes(IFF_file,context->Comment,length);
context->Comment[length]='\0';
section_size -= length;
fseek(IFF_file, section_size, SEEK_CUR);
}
else if (memcmp(section, "ABIT", 4) == 0)
{
// ACBM format : ABIT = Amiga BITplanes
// The ABIT chunk contains contiguous bitplane data.
// The chunk contains sequential data for bitplane 0 through bitplane n.
if (header.Width == 0 || header.Height == 0)
break;
Pre_load(context, header.Width, header.Height, file_size, iff_format, ratio, bpp);
// compute row size
real_line_size = (context->Width+15) & ~15;
plane_line_size = real_line_size >> 3; // 8bits per byte
line_size = plane_line_size * stored_bit_planes;
buffer = malloc(line_size * context->Height);
if ((dword)(line_size * context->Height) == section_size)
header.Compression = 0; // size is of uncompressed data. Forcing.
for (plane = 0; plane < stored_bit_planes; plane++)
{
for (y_pos = 0; y_pos < context->Height; y_pos++)
{
if (header.Compression == 0)
{
if (!Read_bytes(IFF_file,buffer+line_size*y_pos+plane_line_size*plane,plane_line_size))
{
File_error = 21;
break;
}
}
else
{
GFX2_Log(GFX2_WARNING, "Unhandled compression %d for ACBM ABIT chunk\n", header.Compression);
File_error = 32;
break;
}
}
}
if (File_error == 0)
{
for (y_pos = 0; y_pos < context->Height; y_pos++)
{
if (Image_HAM <= 1)
Draw_IFF_line(context, buffer+y_pos*line_size, y_pos,real_line_size, real_bit_planes);
else
Draw_IFF_line_HAM(context, buffer+y_pos*line_size, y_pos,real_line_size, real_bit_planes, PCHG_palettes);
}
}
free(buffer);
buffer = NULL;
}
else if (memcmp(section, "BODY", 4) == 0)
{
long offset = ftell(IFF_file);
if (file_size > (unsigned long)(offset + section_size + 8))
{
// Chunk RAST is placed AFTER the BODY, but we need the palette now to decode the image
// In addition, some files break the IFF standard by not aligning
// the chunk on word boundaries.
fseek(IFF_file, section_size, SEEK_CUR);
Read_bytes(IFF_file, section, 1);
if (section[0] == 'R') // we are good
Read_bytes(IFF_file, section + 1, 3); // read the remaining 3 bytes
else // skip 1 byte
Read_bytes(IFF_file, section, 4); // read 4 bytes
if (memcmp(section, "RAST", 4) == 0)
{
dword rast_size;
Read_dword_be(IFF_file, &rast_size);
RAST_chunk_decode(context, IFF_file, rast_size, &PCHG_palettes);
if (PCHG_palettes != NULL)
bpp = 12;
}
fseek(IFF_file, offset, SEEK_SET); // rewind
}
if (header.Width == 0 || header.Height == 0)
break;
Original_screen_X = header.X_screen;
Original_screen_Y = header.Y_screen;
Pre_load(context, header.Width, header.Height, file_size, iff_format, ratio, bpp);
context->Background_transparent = header.Mask == 2;
context->Transparent_color = context->Background_transparent ? header.Transp_col : 0;
Set_image_mode(context, IMAGE_MODE_ANIMATION);
if (iff_format == FORMAT_LBM) // "ILBM": InterLeaved BitMap
{
LBM_Decode(context, IFF_file, header.Compression, Image_HAM, stored_bit_planes, real_bit_planes, PCHG_palettes);
}
else // "PBM ": Packed BitMap
{
PBM_Decode(context, IFF_file, header.Compression, context->Width, context->Height);
}
if (ftell(IFF_file) & 1)
fseek(IFF_file, 1, SEEK_CUR); // SKIP one byte
if (context->Type == CONTEXT_PREVIEW || context->Type == CONTEXT_PREVIEW_PALETTE)
{
break; // dont load animations in Preview mode
}
}
else
{
// skip section
GFX2_Log(GFX2_INFO, "IFF : Skip unknown section '%.4s' of %u bytes at offset %06X\n", section, section_size, ftell(IFF_file));
if (section_size < 256)
{
byte buffer[256];
Read_bytes(IFF_file, buffer, (section_size+1)&~1);
GFX2_LogHexDump(GFX2_DEBUG, "", buffer, 0, (section_size+1)&~1);
}
else
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
}
}
fclose(IFF_file);
IFF_file = NULL;
}
else
File_error=1;
if (previous_frame)
free(previous_frame);
if (anteprevious_frame)
free(anteprevious_frame);
while (PCHG_palettes != NULL)
{
T_IFF_PCHG_Palette * next = PCHG_palettes->Next;
free(PCHG_palettes);
PCHG_palettes = next;
}
}
// -- Sauver un fichier au format IFF ---------------------------------------
/// Save IFF file (LBM or PBM)
void Save_IFF(T_IO_Context * context)
{
FILE * IFF_file;
T_IFF_Header header;
word x_pos;
word y_pos;
byte temp_byte;
int i;
int palette_entries;
byte bit_depth;
long body_offset = -1;
int is_ehb = 0; // Extra half-bright
if (context->Format == FORMAT_LBM)
{
// Check how many bits are used by pixel colors
temp_byte = 0;
for (y_pos=0; y_posHeight; y_pos++)
for (x_pos=0; x_posWidth; x_pos++)
temp_byte |= Get_pixel(context, x_pos,y_pos);
bit_depth=0;
do
{
bit_depth++;
temp_byte>>=1;
} while (temp_byte);
if (bit_depth == 6)
{
for (i = 0; i < 32; i++)
{
if ( (context->Palette[i].R >> 5) != (context->Palette[i+32].R >> 4)
|| (context->Palette[i].G >> 5) != (context->Palette[i+32].G >> 4)
|| (context->Palette[i].B >> 5) != (context->Palette[i+32].B >> 4))
break;
}
if (i == 32) is_ehb = 1;
}
GFX2_Log(GFX2_DEBUG, "Saving ILBM with bit_depth = %d %s\n", bit_depth,
is_ehb ? "(Extra Half-Bright)" : "");
palette_entries = 1 << (bit_depth - is_ehb);
}
else // FORMAT_PBM
{
bit_depth = 8;
palette_entries = 256;
}
File_error=0;
// Ouverture du fichier
if ((IFF_file=Open_file_write(context)))
{
setvbuf(IFF_file, NULL, _IOFBF, 64*1024);
Write_bytes(IFF_file,"FORM",4);
Write_dword_be(IFF_file,0); // On mettra la taille à jour à la fin
if (context->Format == FORMAT_LBM)
Write_bytes(IFF_file,"ILBM",4);
else
Write_bytes(IFF_file,"PBM ",4);
Write_bytes(IFF_file,"BMHD",4);
Write_dword_be(IFF_file,20);
header.Width=context->Width;
header.Height=context->Height;
header.X_org=0;
header.Y_org=0;
header.BitPlanes=bit_depth;
header.Mask=context->Background_transparent ? 2 : 0;
header.Compression=1;
header.Pad1=0;
header.Transp_col=context->Background_transparent ? context->Transparent_color : 0;
header.X_aspect=10; // Amiga files are usually 10:11
header.Y_aspect=10;
switch (context->Ratio)
{
case PIXEL_SIMPLE:
case PIXEL_DOUBLE:
case PIXEL_TRIPLE:
case PIXEL_QUAD:
default:
break;
case PIXEL_WIDE:
case PIXEL_WIDE2:
header.X_aspect *= 2; // 2:1
break;
case PIXEL_TALL3: // 3:4
header.X_aspect = (header.X_aspect * 15) / 10; // *1.5
#if defined(__GNUC__) && (__GNUC__ >= 7)
__attribute__ ((fallthrough));
#endif
case PIXEL_TALL:
case PIXEL_TALL2:
header.Y_aspect *= 2; // 1:2
break;
}
header.X_screen = context->Width;// Screen_width?;
header.Y_screen = context->Height;// Screen_height?;
Write_word_be(IFF_file,header.Width);
Write_word_be(IFF_file,header.Height);
Write_word_be(IFF_file,header.X_org);
Write_word_be(IFF_file,header.Y_org);
Write_bytes(IFF_file,&header.BitPlanes,1);
Write_bytes(IFF_file,&header.Mask,1);
Write_bytes(IFF_file,&header.Compression,1);
Write_bytes(IFF_file,&header.Pad1,1);
Write_word_be(IFF_file,header.Transp_col);
Write_bytes(IFF_file,&header.X_aspect,1);
Write_bytes(IFF_file,&header.Y_aspect,1);
Write_word_be(IFF_file,header.X_screen);
Write_word_be(IFF_file,header.Y_screen);
if (context->Format == FORMAT_LBM)
{
dword ViewMode = 0; // HIRES=0x8000 LACE=0x4 HAM=0x800 HALFBRITE=0x80
if (is_ehb) ViewMode |= 0x80;
if (context->Width > 400)
{
ViewMode |= 0x8000;
if (context->Width > 800)
ViewMode |= 0x20; // Super High-Res
}
if (context->Height > 300) ViewMode |= 0x4;
Write_bytes(IFF_file, "CAMG", 4);
Write_dword_be(IFF_file, 4); // Section size
Write_dword_be(IFF_file, ViewMode);
}
Write_bytes(IFF_file,"CMAP",4);
Write_dword_be(IFF_file,palette_entries*3);
Write_bytes(IFF_file,context->Palette,palette_entries*3);
if (context->Comment[0]) // write ANNO
{
dword comment_size;
Write_bytes(IFF_file,"ANNO",4); // Chunk name
comment_size = strlen(context->Comment); // NULL termination is not needed
Write_dword_be(IFF_file, comment_size); // Section size
Write_bytes(IFF_file, context->Comment, comment_size);
if (comment_size&1)
Write_byte(IFF_file, 0); // align to WORD boundaries
}
for (i=0; iColor_cycles; i++)
{
word flags=0;
flags|= context->Cycle_range[i].Speed?1:0; // Cycling or not
flags|= context->Cycle_range[i].Inverse?2:0; // Inverted
Write_bytes(IFF_file,"CRNG",4);
Write_dword_be(IFF_file,8); // Section size
Write_word_be(IFF_file,0); // Padding
Write_word_be(IFF_file,context->Cycle_range[i].Speed*78); // Rate
Write_word_be(IFF_file,flags); // Flags
Write_byte(IFF_file,context->Cycle_range[i].Start); // Min color
Write_byte(IFF_file,context->Cycle_range[i].End); // Max color
// No padding, size is multiple of 2
}
body_offset = ftell(IFF_file);
Write_bytes(IFF_file,"BODY",4);
Write_dword_be(IFF_file,0); // On mettra la taille à jour à la fin
if (context->Format == FORMAT_LBM)
{
byte * buffer;
short line_size; // Size of line in bytes
short plane_line_size; // Size of line in bytes for 1 plane
short real_line_size; // Size of line in pixels
T_PackBits_data pb_data;
// Calcul de la taille d'une ligne ILBM (pour les images ayant des dimensions exotiques)
real_line_size = (context->Width+15) & ~15;
plane_line_size = real_line_size >> 3; // 8bits per byte
line_size = plane_line_size * header.BitPlanes;
buffer=(byte *)malloc(line_size);
// Start encoding
PackBits_pack_init(&pb_data, IFF_file);
for (y_pos=0; ((y_posHeight) && (!File_error)); y_pos++)
{
// Dispatch the pixel into planes
memset(buffer,0,line_size);
for (x_pos=0; x_posWidth; x_pos++)
Set_IFF_color(buffer, x_pos, Get_pixel(context, x_pos,y_pos), real_line_size, header.BitPlanes);
if (context->Width&1) // odd width fix
Set_IFF_color(buffer, x_pos, 0, real_line_size, header.BitPlanes);
// encode the resulting sequence of bytes
if (header.Compression)
{
int plane_width=line_size/header.BitPlanes;
int plane;
for (plane=0; planeHeight) && (!File_error)); y_pos++)
{
for (x_pos=0; ((x_posWidth) && (!File_error)); x_pos++)
{
if (PackBits_pack_add(&pb_data, Get_pixel(context, x_pos, y_pos)) < 0)
File_error = 1;
}
if (context->Width & 1) // odd width fix
{
if (PackBits_pack_add(&pb_data, Get_pixel(context, context->Width - 1, y_pos)) < 0)
File_error = 1;
}
if (!File_error)
{
if (PackBits_pack_flush(&pb_data) < 0)
File_error = 1;
}
}
}
// Now update FORM and BODY size
if (!File_error)
{
long file_size = ftell(IFF_file);
if (file_size&1)
{
// PAD to even file size
if (! Write_byte(IFF_file,0))
File_error=1;
}
// Write BODY size
fseek(IFF_file, body_offset + 4, SEEK_SET);
Write_dword_be(IFF_file, file_size-body_offset-8);
// Write FORM size
file_size = (file_size+1)&~1;
fseek(IFF_file,4,SEEK_SET);
Write_dword_be(IFF_file,file_size-8);
}
fclose(IFF_file);
if (File_error != 0) // remove the file if there have been an error
Remove_file(context);
}
else
File_error=1;
}
/** @} */