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PluginPICT.cpp
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1343 lines (1219 loc) · 38.8 KB
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// ==========================================================
// Apple Macintosh QuickDraw/PICT Loader
//
// Design and implementation by
// - Amir Ebrahimi (amir@unity3d.com)
//
// Based on PICT loading code from paintlib (http://www.paintlib.de/paintlib/).
//
// Paintlib License:
// The paintlib source code and all documentation are copyright (c) 1996-2002
// Ulrich von Zadow and other contributors.
//
// The paintlib source code is supplied "AS IS". Ulrich von Zadow and other
// contributors disclaim all warranties, expressed or implied, including, without
// limitation, the warranties of merchantability and of fitness for any purpose.
// The authors assume no liability for direct, indirect, incidental, special,
// exemplary, or consequential damages, which may result from the use of paintlib,
// even if advised of the possibility of such damage.
//
// Permission is hereby granted to use, copy, modify, and distribute this source
// code, or portions hereof, for any purpose, without fee, subject to the following
// restrictions:
//
// 1. The origin of this source code must not be misrepresented.
// 2. Altered versions must be plainly marked as such and must not be misrepresented
// as being the original source.
// 3. This Copyright notice may not be removed or altered from any source or altered
// source distribution.
// 4. Executables containing paintlib or parts of it must state that the software
// "contains paintlib code. paintlib is copyright (c) 1996-2002 Ulrich von Zadow
// and other contributors.". This notice must be displayed in at least one place
// where the copyright for the software itself is displayed. The documentation must
// also contain this notice.
//
// Bug fixes were made to the original code to support version 2 PICT files
// properly.
//
// Additional resources:
// http://developer.apple.com/documentation/mac/QuickDraw/QuickDraw-458.html
// http://www.fileformat.info/format/macpict/egff.htm
//
// Notes (http://lists.apple.com/archives/java-dev/2006/Apr/msg00588.html):
// There are three main types of PICT files:
// - Version 1
// - Version 2
// - Extended Version 2
//
// Some things to look out for:
// - The bounds and target DPI are stored in a different place in all three.
// - Some of the values are fixed-point shorts ( short / 65536f )
// - Values are big endian
// - All of this may be *preceded* by a 512 byte header--sometimes it is
// there, and sometimes it isn't. You just have to check for the magic
// values in both places.
//
// This file is part of FreeImage 3
//
// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================
#include "FreeImage.h"
#include "Utilities.h"
// ==========================================================
// Plugin Interface
// ==========================================================
static int s_format_id;
static const int outputMessageSize = 256;
// ==========================================================
// Internal functions
// ==========================================================
static BYTE
Read8(FreeImageIO *io, fi_handle handle) {
BYTE i = 0;
io->read_proc(&i, 1, 1, handle);
return i;
}
static WORD
Read16(FreeImageIO *io, fi_handle handle) {
// reads a two-byte big-endian integer from the given file and returns its value.
// assumes unsigned.
unsigned hi = Read8(io, handle);
unsigned lo = Read8(io, handle);
return (WORD)(lo + (hi << 8));
}
static unsigned
Read32(FreeImageIO *io, fi_handle handle) {
// reads a four-byte big-endian integer from the given file and returns its value.
// assumes unsigned.
unsigned b3 = Read8(io, handle);
unsigned b2 = Read8(io, handle);
unsigned b1 = Read8(io, handle);
unsigned b0 = Read8(io, handle);
return (b3 << 24) + (b2 << 16) + (b1 << 8) + b0;
}
// ----------------------------------------------------------
struct OpDef
{
const char * name;
int len;
const char * description;
};
// for reserved opcodes
#define res(length) { "reserved", (length), "reserved for Apple use" }
#define RGB_LEN 6
#define WORD_LEN -1
#define NA 0
static OpDef optable[] =
{
/* 0x00 */ { "NOP", 0, "nop" },
/* 0x01 */ { "Clip", NA, "clip" },
/* 0x02 */ { "BkPat", 8, "background pattern" },
/* 0x03 */ { "TxFont", 2, "text font (word)" },
/* 0x04 */ { "TxFace", 1, "text face (byte)" },
/* 0x05 */ { "TxMode", 2, "text mode (word)" },
/* 0x06 */ { "SpExtra", 4, "space extra (fixed point)" },
/* 0x07 */ { "PnSize", 4, "pen size (point)" },
/* 0x08 */ { "PnMode", 2, "pen mode (word)" },
/* 0x09 */ { "PnPat", 8, "pen pattern" },
/* 0x0a */ { "FillPat", 8, "fill pattern" },
/* 0x0b */ { "OvSize", 4, "oval size (point)" },
/* 0x0c */ { "Origin", 4, "dh, dv (word)" },
/* 0x0d */ { "TxSize", 2, "text size (word)" },
/* 0x0e */ { "FgColor", 4, "foreground color (longword)" },
/* 0x0f */ { "BkColor", 4, "background color (longword)" },
/* 0x10 */ { "TxRatio", 8, "numerator (point), denominator (point)" },
/* 0x11 */ { "Version", 1, "version (byte)" },
/* 0x12 */ { "BkPixPat", NA, "color background pattern" },
/* 0x13 */ { "PnPixPat", NA, "color pen pattern" },
/* 0x14 */ { "FillPixPat", NA, "color fill pattern" },
/* 0x15 */ { "PnLocHFrac", 2, "fractional pen position" },
/* 0x16 */ { "ChExtra", 2, "extra for each character" },
/* 0x17 */ res(0),
/* 0x18 */ res(0),
/* 0x19 */ res(0),
/* 0x1a */ { "RGBFgCol", RGB_LEN, "RGB foreColor" },
/* 0x1b */ { "RGBBkCol", RGB_LEN, "RGB backColor" },
/* 0x1c */ { "HiliteMode", 0, "hilite mode flag" },
/* 0x1d */ { "HiliteColor", RGB_LEN, "RGB hilite color" },
/* 0x1e */ { "DefHilite", 0, "Use default hilite color" },
/* 0x1f */ { "OpColor", 6, "RGB OpColor for arithmetic modes" },
/* 0x20 */ { "Line", 8, "pnLoc (point), newPt (point)" },
/* 0x21 */ { "LineFrom", 4, "newPt (point)" },
/* 0x22 */ { "ShortLine", 6, "pnLoc (point, dh, dv (-128 .. 127))" },
/* 0x23 */ { "ShortLineFrom", 2, "dh, dv (-128 .. 127)" },
/* 0x24 */ res(WORD_LEN),
/* 0x25 */ res(WORD_LEN),
/* 0x26 */ res(WORD_LEN),
/* 0x27 */ res(WORD_LEN),
/* 0x28 */ { "LongText", NA, "txLoc (point), count (0..255), text" },
/* 0x29 */ { "DHText", NA, "dh (0..255), count (0..255), text" },
/* 0x2a */ { "DVText", NA, "dv (0..255), count (0..255), text" },
/* 0x2b */ { "DHDVText", NA, "dh, dv (0..255), count (0..255), text" },
/* 0x2c */ res(WORD_LEN),
/* 0x2d */ res(WORD_LEN),
/* 0x2e */ res(WORD_LEN),
/* 0x2f */ res(WORD_LEN),
/* 0x30 */ { "frameRect", 8, "rect" },
/* 0x31 */ { "paintRect", 8, "rect" },
/* 0x32 */ { "eraseRect", 8, "rect" },
/* 0x33 */ { "invertRect", 8, "rect" },
/* 0x34 */ { "fillRect", 8, "rect" },
/* 0x35 */ res(8),
/* 0x36 */ res(8),
/* 0x37 */ res(8),
/* 0x38 */ { "frameSameRect", 0, "rect" },
/* 0x39 */ { "paintSameRect", 0, "rect" },
/* 0x3a */ { "eraseSameRect", 0, "rect" },
/* 0x3b */ { "invertSameRect", 0, "rect" },
/* 0x3c */ { "fillSameRect", 0, "rect" },
/* 0x3d */ res(0),
/* 0x3e */ res(0),
/* 0x3f */ res(0),
/* 0x40 */ { "frameRRect", 8, "rect" },
/* 0x41 */ { "paintRRect", 8, "rect" },
/* 0x42 */ { "eraseRRect", 8, "rect" },
/* 0x43 */ { "invertRRect", 8, "rect" },
/* 0x44 */ { "fillRRrect", 8, "rect" },
/* 0x45 */ res(8),
/* 0x46 */ res(8),
/* 0x47 */ res(8),
/* 0x48 */ { "frameSameRRect", 0, "rect" },
/* 0x49 */ { "paintSameRRect", 0, "rect" },
/* 0x4a */ { "eraseSameRRect", 0, "rect" },
/* 0x4b */ { "invertSameRRect", 0, "rect" },
/* 0x4c */ { "fillSameRRect", 0, "rect" },
/* 0x4d */ res(0),
/* 0x4e */ res(0),
/* 0x4f */ res(0),
/* 0x50 */ { "frameOval", 8, "rect" },
/* 0x51 */ { "paintOval", 8, "rect" },
/* 0x52 */ { "eraseOval", 8, "rect" },
/* 0x53 */ { "invertOval", 8, "rect" },
/* 0x54 */ { "fillOval", 8, "rect" },
/* 0x55 */ res(8),
/* 0x56 */ res(8),
/* 0x57 */ res(8),
/* 0x58 */ { "frameSameOval", 0, "rect" },
/* 0x59 */ { "paintSameOval", 0, "rect" },
/* 0x5a */ { "eraseSameOval", 0, "rect" },
/* 0x5b */ { "invertSameOval", 0, "rect" },
/* 0x5c */ { "fillSameOval", 0, "rect" },
/* 0x5d */ res(0),
/* 0x5e */ res(0),
/* 0x5f */ res(0),
/* 0x60 */ { "frameArc", 12, "rect, startAngle, arcAngle" },
/* 0x61 */ { "paintArc", 12, "rect, startAngle, arcAngle" },
/* 0x62 */ { "eraseArc", 12, "rect, startAngle, arcAngle" },
/* 0x63 */ { "invertArc", 12, "rect, startAngle, arcAngle" },
/* 0x64 */ { "fillArc", 12, "rect, startAngle, arcAngle" },
/* 0x65 */ res(12),
/* 0x66 */ res(12),
/* 0x67 */ res(12),
/* 0x68 */ { "frameSameArc", 4, "rect, startAngle, arcAngle" },
/* 0x69 */ { "paintSameArc", 4, "rect, startAngle, arcAngle" },
/* 0x6a */ { "eraseSameArc", 4, "rect, startAngle, arcAngle" },
/* 0x6b */ { "invertSameArc", 4, "rect, startAngle, arcAngle" },
/* 0x6c */ { "fillSameArc", 4, "rect, startAngle, arcAngle" },
/* 0x6d */ res(4),
/* 0x6e */ res(4),
/* 0x6f */ res(4),
/* 0x70 */ { "framePoly", NA, "poly" },
/* 0x71 */ { "paintPoly", NA, "poly" },
/* 0x72 */ { "erasePoly", NA, "poly" },
/* 0x73 */ { "invertPoly", NA, "poly" },
/* 0x74 */ { "fillPoly", NA, "poly" },
/* 0x75 */ res(NA),
/* 0x76 */ res(NA),
/* 0x77 */ res(NA),
/* 0x78 */ { "frameSamePoly", 0, "poly (NYI)" },
/* 0x79 */ { "paintSamePoly", 0, "poly (NYI)" },
/* 0x7a */ { "eraseSamePoly", 0, "poly (NYI)" },
/* 0x7b */ { "invertSamePoly", 0, "poly (NYI)" },
/* 0x7c */ { "fillSamePoly", 0, "poly (NYI)" },
/* 0x7d */ res(0),
/* 0x7e */ res(0),
/* 0x7f */ res(0),
/* 0x80 */ { "frameRgn", NA, "region" },
/* 0x81 */ { "paintRgn", NA, "region" },
/* 0x82 */ { "eraseRgn", NA, "region" },
/* 0x83 */ { "invertRgn", NA, "region" },
/* 0x84 */ { "fillRgn", NA, "region" },
/* 0x85 */ res(NA),
/* 0x86 */ res(NA),
/* 0x87 */ res(NA),
/* 0x88 */ { "frameSameRgn", 0, "region (NYI)" },
/* 0x89 */ { "paintSameRgn", 0, "region (NYI)" },
/* 0x8a */ { "eraseSameRgn", 0, "region (NYI)" },
/* 0x8b */ { "invertSameRgn", 0, "region (NYI)" },
/* 0x8c */ { "fillSameRgn", 0, "region (NYI)" },
/* 0x8d */ res(0),
/* 0x8e */ res(0),
/* 0x8f */ res(0),
/* 0x90 */ { "BitsRect", NA, "copybits, rect clipped" },
/* 0x91 */ { "BitsRgn", NA, "copybits, rgn clipped" },
/* 0x92 */ res(WORD_LEN),
/* 0x93 */ res(WORD_LEN),
/* 0x94 */ res(WORD_LEN),
/* 0x95 */ res(WORD_LEN),
/* 0x96 */ res(WORD_LEN),
/* 0x97 */ res(WORD_LEN),
/* 0x98 */ { "PackBitsRect", NA, "packed copybits, rect clipped" },
/* 0x99 */ { "PackBitsRgn", NA, "packed copybits, rgn clipped" },
/* 0x9a */ { "Opcode_9A", NA, "the mysterious opcode 9A" },
/* 0x9b */ res(WORD_LEN),
/* 0x9c */ res(WORD_LEN),
/* 0x9d */ res(WORD_LEN),
/* 0x9e */ res(WORD_LEN),
/* 0x9f */ res(WORD_LEN),
/* 0xa0 */ { "ShortComment", 2, "kind (word)" },
/* 0xa1 */ { "LongComment", NA, "kind (word), size (word), data" }
};
// ----------------------------------------------------------
struct MacRect
{
WORD top;
WORD left;
WORD bottom;
WORD right;
};
struct MacpixMap
{
// Ptr baseAddr // Not used in file.
// short rowBytes // read in seperatly.
struct MacRect Bounds;
WORD version;
WORD packType;
LONG packSize;
LONG hRes;
LONG vRes;
WORD pixelType;
WORD pixelSize;
WORD cmpCount;
WORD cmpSize;
LONG planeBytes;
LONG pmTable;
LONG pmReserved;
};
struct MacRGBColour
{
WORD red;
WORD green;
WORD blue;
};
struct MacPoint
{
WORD x;
WORD y;
};
struct MacPattern // Klaube
{
BYTE pix[64];
};
// ----------------------------------------------------------
static void
ReadRect( FreeImageIO *io, fi_handle handle, MacRect* rect ) {
rect->top = Read16( io, handle );
rect->left = Read16( io, handle );
rect->bottom = Read16( io, handle );
rect->right = Read16( io, handle );
}
static void
ReadPixmap( FreeImageIO *io, fi_handle handle, MacpixMap* pPixMap ) {
pPixMap->version = Read16( io, handle );
pPixMap->packType = Read16( io, handle );
pPixMap->packSize = Read32( io, handle );
pPixMap->hRes = Read16( io, handle );
Read16( io, handle );
pPixMap->vRes = Read16( io, handle );
Read16( io, handle );
pPixMap->pixelType = Read16( io, handle );
pPixMap->pixelSize = Read16( io, handle );
pPixMap->cmpCount = Read16( io, handle );
pPixMap->cmpSize = Read16( io, handle );
pPixMap->planeBytes = Read32( io, handle );
pPixMap->pmTable = Read32( io, handle );
pPixMap->pmReserved = Read32( io, handle );
}
/**
Reads a mac color table into a bitmap palette.
*/
static void
ReadColorTable( FreeImageIO *io, fi_handle handle, WORD* pNumColors, RGBQUAD* pPal ) {
LONG ctSeed;
WORD ctFlags;
WORD val;
int i;
ctSeed = Read32( io, handle );
ctFlags = Read16( io, handle );
WORD numColors = Read16( io, handle )+1;
*pNumColors = numColors;
for (i = 0; i < numColors; i++) {
val = Read16( io, handle );
if (ctFlags & 0x8000) {
// The indicies in a device colour table are bogus and
// usually == 0, so I assume we allocate up the list of
// colours in order.
val = (WORD)i;
}
if (val >= numColors) {
throw "pixel value greater than color table size.";
}
// Mac colour tables contain 16-bit values for R, G, and B...
pPal[val].rgbRed = ((BYTE) (((WORD) (Read16( io, handle )) >> 8) & 0xFF));
pPal[val].rgbGreen = ((BYTE) (((WORD) (Read16( io, handle )) >> 8) & 0xFF));
pPal[val].rgbBlue = ((BYTE) (((WORD) (Read16( io, handle )) >> 8) & 0xFF));
}
}
/**
skips unneeded packbits.
pixelSize == Source bits per pixel.
*/
static void
SkipBits( FreeImageIO *io, fi_handle handle, MacRect* bounds, WORD rowBytes, int pixelSize ) {
int i;
WORD pixwidth; // bytes per row when uncompressed.
int height = bounds->bottom - bounds->top;
int width = bounds->right - bounds->left;
// High bit of rowBytes is flag.
if (pixelSize <= 8) {
rowBytes &= 0x7fff;
}
pixwidth = (WORD)width;
if (pixelSize == 16) {
pixwidth *= 2;
}
if (rowBytes == 0) {
rowBytes = pixwidth;
}
if (rowBytes < 8) {
io->seek_proc( handle, rowBytes*height, SEEK_CUR );
}
else {
for (i = 0; i < height; i++) {
int lineLen; // length of source line in bytes.
if (rowBytes > 250) {
lineLen = Read16( io, handle );
} else {
lineLen = Read8( io, handle );
}
io->seek_proc( handle, lineLen, SEEK_CUR );
}
}
}
/**
Skip polygon or region
*/
static void
SkipPolyOrRegion( FreeImageIO *io, fi_handle handle ) {
WORD len = Read16( io, handle ) - 2;
io->seek_proc(handle, len, SEEK_CUR);
}
/**
Width in bytes for 8 bpp or less.
Width in pixels for 16 bpp.
Expands Width units to 32-bit pixel data.
*/
static void
expandBuf( FreeImageIO *io, fi_handle handle, int width, int bpp, BYTE* dst ) {
switch (bpp) {
case 16:
for ( int i=0; i<width; i++) {
WORD src = Read16( io, handle );
dst[ FI_RGBA_BLUE ] = (src & 31)*8; // Blue
dst[ FI_RGBA_GREEN ] = ((src >> 5) & 31)*8; // Green
dst[ FI_RGBA_RED ] = ((src >> 10) & 31)*8; // Red
dst[ FI_RGBA_ALPHA ] = 0xFF; // Alpha
dst += 4;
}
break;
default:
throw "Bad bits per pixel in expandBuf.";
}
}
/**
Expands Width units to 8-bit pixel data.
Max. 8 bpp source format.
*/
static void
expandBuf8( FreeImageIO *io, fi_handle handle, int width, int bpp, BYTE* dst )
{
switch (bpp) {
case 8:
io->read_proc( dst, width, 1, handle );
break;
case 4:
for (int i = 0; i < width; i++) {
WORD src = Read8( io, handle );
*dst = (src >> 4) & 15;
*(dst+1) = (src & 15);
dst += 2;
}
if (width & 1) { // Odd Width?
WORD src = Read8( io, handle );
*dst = (src >> 4) & 15;
dst++;
}
break;
case 2:
for (int i = 0; i < width; i++) {
WORD src = Read8( io, handle );
*dst = (src >> 6) & 3;
*(dst+1) = (src >> 4) & 3;
*(dst+2) = (src >> 2) & 3;
*(dst+3) = (src & 3);
dst += 4;
}
if (width & 3) { // Check for leftover pixels
for (int i = 6; i > 8 - (width & 3) * 2; i -= 2) {
WORD src = Read8( io, handle );
*dst = (src >> i) & 3;
dst++;
}
}
break;
case 1:
for (int i = 0; i < width; i++) {
WORD src = Read8( io, handle );
*dst = (src >> 7) & 1;
*(dst+1) = (src >> 6) & 1;
*(dst+2) = (src >> 5) & 1;
*(dst+3) = (src >> 4) & 1;
*(dst+4) = (src >> 3) & 1;
*(dst+5) = (src >> 2) & 1;
*(dst+6) = (src >> 1) & 1;
*(dst+7) = (src & 1);
dst += 8;
}
if (width & 7) { // Check for leftover pixels
for (int i = 7; i > (8-width & 7); i--) {
WORD src = Read8( io, handle );
*dst = (src >> i) & 1;
dst++;
}
}
break;
default:
throw "Bad bits per pixel in expandBuf8.";
}
}
static BYTE*
UnpackPictRow( FreeImageIO *io, fi_handle handle, BYTE* pLineBuf, int width, int rowBytes, int srcBytes ) {
if (rowBytes < 8) { // Ah-ha! The bits aren't actually packed. This will be easy.
io->read_proc( pLineBuf, rowBytes, 1, handle );
}
else {
BYTE* pCurPixel = pLineBuf;
// Unpack RLE. The data is packed bytewise.
for (int j = 0; j < srcBytes; ) {
BYTE FlagCounter = Read8( io, handle );
if (FlagCounter & 0x80) {
if (FlagCounter == 0x80) {
// Special case: repeat value of 0.
// Apple says ignore.
j++;
} else {
// Packed data.
int len = ((FlagCounter ^ 255) & 255) + 2;
BYTE p = Read8( io, handle );
memset( pCurPixel, p, len);
pCurPixel += len;
j += 2;
}
}
else {
// Unpacked data
int len = (FlagCounter & 255) + 1;
io->read_proc( pCurPixel, len, 1, handle );
pCurPixel += len;
j += len + 1;
}
}
}
return pLineBuf;
}
/**
This routine decompresses BitsRects with a packType of 4 (and 32 bits per pixel).
In this format, each line is separated into 8-bit-bitplanes and then compressed via RLE.
To decode, the routine decompresses each line & then juggles the bytes around to get pixel-oriented data.
NumBitPlanes == 3 if RGB, 4 if RGBA
*/
static void
Unpack32Bits( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, MacRect* bounds, WORD rowBytes, int numPlanes ) {
int height = bounds->bottom - bounds->top;
int width = bounds->right - bounds->left;
if (rowBytes == 0) {
rowBytes = (WORD)( width * 4 );
}
BYTE* pLineBuf = (BYTE*)malloc( rowBytes ); // Let's allocate enough for 4 bit planes
if ( pLineBuf ) {
try {
for ( int i = 0; i < height; i++ ) {
// for each line do...
int linelen; // length of source line in bytes.
if (rowBytes > 250) {
linelen = Read16( io, handle );
} else {
linelen = Read8( io, handle);
}
BYTE* pBuf = UnpackPictRow( io, handle, pLineBuf, width, rowBytes, linelen );
// Convert plane-oriented data into pixel-oriented data &
// copy into destination bitmap.
BYTE* dst = (BYTE*)FreeImage_GetScanLine( dib, height - 1 - i);
if ( numPlanes == 3 ) {
for ( int j = 0; j < width; j++ ) {
// For each pixel in line...
dst[ FI_RGBA_BLUE ] = (*(pBuf+width*2)); // Blue
dst[ FI_RGBA_GREEN ] = (*(pBuf+width)); // Green
dst[ FI_RGBA_RED ] = (*pBuf); // Red
dst[ FI_RGBA_ALPHA ] = (0xFF);
dst += 4;
pBuf++;
}
} else {
for ( int j = 0; j < width; j++ ) {
// For each pixel in line...
dst[ FI_RGBA_BLUE ] = (*(pBuf+width*3)); // Blue
dst[ FI_RGBA_GREEN ] = (*(pBuf+width*2)); // Green
dst[ FI_RGBA_RED ] = (*(pBuf+width)); // Red
dst[ FI_RGBA_ALPHA ] = (*pBuf);
dst += 4;
pBuf++;
}
}
}
}
catch( ... ) {
free( pLineBuf );
throw;
}
}
free( pLineBuf );
}
/**
Decompression routine for 8 bpp.
rowBytes is the number of bytes each source row would take if it were uncompressed.
This _isn't_ equal to the number of pixels in the row - it seems apple pads the data to a word boundary and then compresses it.
Of course, we have to decompress the excess data and then throw it away.
*/
static void
Unpack8Bits( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, MacRect* bounds, WORD rowBytes ) {
int height = bounds->bottom - bounds->top;
int width = bounds->right - bounds->left;
// High bit of rowBytes is flag.
rowBytes &= 0x7fff;
if (rowBytes == 0) {
rowBytes = (WORD)width;
}
for ( int i = 0; i < height; i++ ) {
int linelen; // length of source line in bytes.
if (rowBytes > 250) {
linelen = Read16( io, handle );
} else {
linelen = Read8( io, handle );
}
BYTE* dst = (BYTE*)FreeImage_GetScanLine( dib, height - 1 - i);
dst = UnpackPictRow( io, handle, dst, width, rowBytes, linelen );
}
}
/**
Decompression routine for everything but 8 & 32 bpp.
This routine is slower than the two routines above since it has to deal with a lot of special cases :-(.
It's also a bit chaotic because of these special cases...
unpack8bits is basically a dumber version of unpackbits.
pixelSize == Source bits per pixel.
*/
static void
UnpackBits( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, MacRect* bounds, WORD rowBytes, int pixelSize ) {
WORD pixwidth; // bytes per row when uncompressed.
int pkpixsize;
int PixelPerRLEUnit;
char outputMessage[ outputMessageSize ] = "";
int height = bounds->bottom - bounds->top;
int width = bounds->right - bounds->left;
// High bit of rowBytes is flag.
if (pixelSize <= 8) {
rowBytes &= 0x7fff;
}
pixwidth = (WORD)width;
pkpixsize = 1; // RLE unit: one byte for everything...
if (pixelSize == 16) { // ...except 16 bpp.
pkpixsize = 2;
pixwidth *= 2;
}
if (rowBytes == 0) {
rowBytes = pixwidth;
}
{
// I allocate the temporary line buffer here. I allocate too
// much memory to compensate for sloppy (& hence fast) decompression.
switch (pixelSize) {
case 1:
PixelPerRLEUnit = 8;
break;
case 2:
PixelPerRLEUnit = 4;
break;
case 4:
PixelPerRLEUnit = 2;
break;
case 8:
PixelPerRLEUnit = 1;
break;
case 16:
PixelPerRLEUnit = 1;
break;
default:
sprintf( outputMessage, "Illegal bpp value in unpackbits: %d\n", pixelSize );
throw outputMessage;
}
if (rowBytes < 8) {
// ah-ha! The bits aren't actually packed. This will be easy.
for ( int i = 0; i < height; i++ ) {
BYTE* dst = (BYTE*)FreeImage_GetScanLine( dib, height - 1 - i);
if (pixelSize == 16) {
expandBuf( io, handle, width, pixelSize, dst );
} else {
expandBuf8( io, handle, width, pixelSize, dst );
}
}
}
else {
for ( int i = 0; i < height; i++ ) {
// For each line do...
int linelen; // length of source line in bytes.
if (rowBytes > 250) {
linelen = Read16( io, handle );
} else {
linelen = Read8( io, handle );
}
BYTE* dst = (BYTE*)FreeImage_GetScanLine( dib, height - 1 - i);
BYTE FlagCounter;
// Unpack RLE. The data is packed bytewise - except for
// 16 bpp data, which is packed per pixel :-(.
for ( int j = 0; j < linelen; ) {
FlagCounter = Read8( io, handle );
if (FlagCounter & 0x80) {
if (FlagCounter == 0x80) {
// Special case: repeat value of 0.
// Apple says ignore.
j++;
}
else {
// Packed data.
int len = ((FlagCounter ^ 255) & 255) + 2;
// This is slow for some formats...
if (pixelSize == 16) {
expandBuf( io, handle, 1, pixelSize, dst );
for ( int k = 1; k < len; k++ ) {
// Repeat the pixel len times.
memcpy( dst+(k*4*PixelPerRLEUnit), dst, 4*PixelPerRLEUnit);
}
dst += len*4*PixelPerRLEUnit;
}
else {
expandBuf8( io, handle, 1, pixelSize, dst );
for ( int k = 1; k < len; k++ ) {
// Repeat the expanded byte len times.
memcpy( dst+(k*PixelPerRLEUnit), dst, PixelPerRLEUnit);
}
dst += len*PixelPerRLEUnit;
}
j += pkpixsize + 1;
}
}
else {
// Unpacked data
int len = (FlagCounter & 255) + 1;
if (pixelSize == 16) {
expandBuf( io, handle, len, pixelSize, dst );
dst += len*4*PixelPerRLEUnit;
}
else {
expandBuf8( io, handle, len, pixelSize, dst );
dst += len*PixelPerRLEUnit;
}
j += ( len * pkpixsize ) + 1;
}
}
}
}
}
}
static void
DecodeOp9a( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, MacpixMap* pixMap ) {
// Do the actual unpacking.
switch ( pixMap->pixelSize ) {
case 32:
Unpack32Bits( io, handle, dib, &pixMap->Bounds, 0, pixMap->cmpCount );
break;
case 8:
Unpack8Bits( io, handle, dib, &pixMap->Bounds, 0 );
break;
default:
UnpackBits( io, handle, dib, &pixMap->Bounds, 0, pixMap->pixelSize );
}
}
static void
DecodeBitmap( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, BOOL isRegion, MacRect* bounds, WORD rowBytes ) {
WORD mode = Read16( io, handle );
if ( isRegion ) {
SkipPolyOrRegion( io, handle );
}
RGBQUAD* pal = FreeImage_GetPalette( dib );
if ( !pal ) {
throw "No palette for bitmap!";
}
for (int i = 0; i < 2; i++) {
unsigned char val = i ? 0xFF : 0x0;
pal[i].rgbRed = val;
pal[i].rgbGreen = val;
pal[i].rgbBlue = val;
}
UnpackBits( io, handle, dib, bounds, rowBytes, 1 );
}
static void
DecodePixmap( FreeImageIO *io, fi_handle handle, FIBITMAP* dib, BOOL isRegion, MacpixMap* pixMap, WORD rowBytes ) {
// Read mac colour table into windows palette.
WORD numColors; // Palette size.
RGBQUAD ct[256];
ReadColorTable( io, handle, &numColors, ct );
if ( FreeImage_GetBPP( dib ) == 8 ) {
RGBQUAD* pal = FreeImage_GetPalette( dib );
if ( !pal ) {
throw "No palette for bitmap!";
}
for (int i = 0; i < numColors; i++) {
pal[i].rgbRed = ct[ i ].rgbRed;
pal[i].rgbGreen = ct[ i ].rgbGreen;
pal[i].rgbBlue = ct[ i ].rgbBlue;
}
}
// Ignore source & destination rectangle as well as transfer mode.
MacRect tempRect;
ReadRect( io, handle, &tempRect );
ReadRect( io, handle, &tempRect );
WORD mode = Read16( io, handle );
if ( isRegion) {
SkipPolyOrRegion( io, handle );
}
switch ( pixMap->pixelSize ) {
case 32:
Unpack32Bits( io, handle, dib, &pixMap->Bounds, rowBytes, pixMap->cmpCount );
break;
case 8:
Unpack8Bits( io, handle, dib, &pixMap->Bounds, rowBytes );
break;
default:
UnpackBits( io, handle, dib, &pixMap->Bounds, rowBytes, pixMap->pixelSize );
}
}
// ==========================================================
// Plugin Implementation
// ==========================================================
static const char * DLL_CALLCONV
Format() {
return "PICT";
}
static const char * DLL_CALLCONV
Description() {
return "Macintosh PICT";
}
static const char * DLL_CALLCONV
Extension() {
return "pct,pict,pic";
}
static const char * DLL_CALLCONV
MimeType() {
return "image/x-pict";
}
static BOOL DLL_CALLCONV
Validate(FreeImageIO *io, fi_handle handle) {
if(io->seek_proc(handle, 522, SEEK_SET) == 0) {
BYTE pict_signature[] = { 0x00, 0x11, 0x02, 0xFF, 0x0C, 0X00 };
BYTE signature[6];
if(io->read_proc(signature, 1, sizeof(pict_signature), handle)) {
// v1.0 files have 0x11 (version operator) followed by 0x01 (version number)
// v2.0 files have 0x0011 (version operator) followed by 0x02ff (version number)
// and additionally 0x0c00 as a header opcode
// Currently, we are only supporting v2.0
return (memcmp(pict_signature, signature, sizeof(pict_signature)) == 0);
} else {
return FALSE;
}
}
return FALSE;
}
static BOOL DLL_CALLCONV
SupportsExportDepth(int depth) {
return FALSE;
}
static BOOL DLL_CALLCONV
SupportsExportType(FREE_IMAGE_TYPE type) {
return FALSE;
}
static BOOL DLL_CALLCONV
SupportsICCProfiles() {
return FALSE;
}
/**
This plugin decodes macintosh PICT files with 1,2,4,8,16 and 32 bits per pixel as well as PICT/JPEG.
If an alpha channel is present in a 32-bit-PICT, it is decoded as well.
The PICT format is a general picture file format and can contain a lot of other elements besides bitmaps.
These elements are ignored.
*/
static FIBITMAP * DLL_CALLCONV
Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
char outputMessage[ outputMessageSize ] = "";
FIBITMAP* dib = NULL;
try {
// Skip empty 512 byte header.
if ( !io->seek_proc(handle, 512, SEEK_CUR) == 0 )
return NULL;
// Read PICT header
Read16( io, handle ); // Skip version 1 picture size
MacRect frame;
ReadRect( io, handle, &frame );
BYTE b = 0;
while ((b = Read8(io, handle)) == 0);
if ( b != 0x11 ) {
throw "invalid header: version number missing.";
}
int version = Read8( io, handle );
if ( version == 2 && Read8( io, handle ) != 0xff ) {
throw "invalid header: illegal version number.";
}
enum PICTType {none, op9a, jpeg, pixmap, bitmap};
PICTType pictType = none;
MacRect bounds;
MacpixMap pixMap;
int hRes = 0x480000; // in pixels/inch (72 by default == 0x480000 in fixed point)
int vRes = 0x480000; // in pixels/inch (72 by default == 0x480000 in fixed point)
WORD rowBytes = 0;
BOOL isRegion = FALSE;
BOOL done = FALSE;
long currentPos = 0;
while ( !done ) {
WORD opcode = 0;
// get the current stream position (used to avoid infinite loops)
currentPos = io->tell_proc(handle);
if ((version == 1) || ((io->tell_proc( handle ) % 2) != 0)) {
// align to word for version 2