742 lines
15 KiB
C++
742 lines
15 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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// lbmlib.c
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#include <WINDOWS.H>
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#include <STDIO.H>
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#include "lbmlib.h"
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#include "goldsrc_standin.h"
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/*
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============================================================================
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LBM STUFF
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============================================================================
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*/
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#define FORMID ('F'+('O'<<8)+((int)'R'<<16)+((int)'M'<<24))
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#define ILBMID ('I'+('L'<<8)+((int)'B'<<16)+((int)'M'<<24))
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#define PBMID ('P'+('B'<<8)+((int)'M'<<16)+((int)' '<<24))
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#define BMHDID ('B'+('M'<<8)+((int)'H'<<16)+((int)'D'<<24))
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#define BODYID ('B'+('O'<<8)+((int)'D'<<16)+((int)'Y'<<24))
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#define CMAPID ('C'+('M'<<8)+((int)'A'<<16)+((int)'P'<<24))
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bmhd_t bmhd;
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int Align (int l)
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{
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if (l&1)
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return l+1;
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return l;
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}
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/*
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================
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=
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= LBMRLEdecompress
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=
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= Source must be evenly aligned!
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=
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================
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*/
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byte *LBMRLEDecompress (byte *source,byte *unpacked, int bpwidth)
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{
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int count;
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byte b,rept;
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count = 0;
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do
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{
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rept = *source++;
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if (rept > 0x80)
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{
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rept = (rept^0xff)+2;
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b = *source++;
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memset(unpacked,b,rept);
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unpacked += rept;
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}
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else if (rept < 0x80)
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{
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rept++;
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memcpy(unpacked,source,rept);
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unpacked += rept;
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source += rept;
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}
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else
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rept = 0; // rept of 0x80 is NOP
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count += rept;
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} while (count<bpwidth);
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if (count>bpwidth)
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Error ("Decompression exceeded width!\n");
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return source;
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}
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#define BPLANESIZE 128
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byte bitplanes[9][BPLANESIZE]; // max size 1024 by 9 bit planes
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/*
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=================
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=
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= MungeBitPlanes8
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=
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= This destroys the bit plane data!
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=
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=================
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*/
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void MungeBitPlanes8 (int width, byte *dest)
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{
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*dest=width; // shut up the compiler warning
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Error ("MungeBitPlanes8 not rewritten!");
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#if 0
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asm les di,[dest]
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asm mov si,-1
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asm mov cx,[width]
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mungebyte:
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asm inc si
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asm mov dx,8
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mungebit:
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asm shl [BYTE PTR bitplanes + BPLANESIZE*7 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*6 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*5 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*4 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*3 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*2 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
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asm rcl al,1
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asm stosb
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asm dec cx
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asm jz done
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asm dec dx
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asm jnz mungebit
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asm jmp mungebyte
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done:
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#endif
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}
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void MungeBitPlanes4 (int width, byte *dest)
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{
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*dest=width; // shut up the compiler warning
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Error ("MungeBitPlanes4 not rewritten!");
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#if 0
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asm les di,[dest]
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asm mov si,-1
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asm mov cx,[width]
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mungebyte:
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asm inc si
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asm mov dx,8
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mungebit:
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asm xor al,al
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asm shl [BYTE PTR bitplanes + BPLANESIZE*3 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*2 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
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asm rcl al,1
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asm stosb
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asm dec cx
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asm jz done
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asm dec dx
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asm jnz mungebit
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asm jmp mungebyte
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done:
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#endif
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}
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void MungeBitPlanes2 (int width, byte *dest)
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{
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*dest=width; // shut up the compiler warning
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Error ("MungeBitPlanes2 not rewritten!");
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#if 0
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asm les di,[dest]
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asm mov si,-1
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asm mov cx,[width]
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mungebyte:
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asm inc si
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asm mov dx,8
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mungebit:
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asm xor al,al
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asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
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asm rcl al,1
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asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
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asm rcl al,1
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asm stosb
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asm dec cx
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asm jz done
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asm dec dx
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asm jnz mungebit
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asm jmp mungebyte
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done:
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#endif
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}
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void MungeBitPlanes1 (int width, byte *dest)
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{
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*dest=width; // shut up the compiler warning
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Error ("MungeBitPlanes1 not rewritten!");
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#if 0
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asm les di,[dest]
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asm mov si,-1
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asm mov cx,[width]
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mungebyte:
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asm inc si
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asm mov dx,8
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mungebit:
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asm xor al,al
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asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
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asm rcl al,1
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asm stosb
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asm dec cx
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asm jz done
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asm dec dx
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asm jnz mungebit
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asm jmp mungebyte
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done:
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#endif
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}
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int LoadBMP (const char* szFile, BYTE** ppbBits, BYTE** ppbPalette)
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{
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int i, rc = 0;
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FILE *pfile = NULL;
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BITMAPFILEHEADER bmfh;
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BITMAPINFOHEADER bmih;
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RGBQUAD rgrgbPalette[256];
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ULONG cbBmpBits;
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BYTE* pbBmpBits;
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byte *pb, *pbPal = NULL;
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ULONG cbPalBytes;
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ULONG biTrueWidth;
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// Bogus parameter check
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if (!(ppbPalette != NULL && ppbBits != NULL))
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{ fprintf(stderr, "invalid BMP file\n"); rc = -1000; goto GetOut; }
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// File exists?
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if ((pfile = fopen(szFile, "rb")) == NULL)
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{ fprintf(stderr, "unable to open BMP file\n"); rc = -1; goto GetOut; }
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// Read file header
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if (fread(&bmfh, sizeof bmfh, 1/*count*/, pfile) != 1)
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{ rc = -2; goto GetOut; }
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// Bogus file header check
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if (!(bmfh.bfReserved1 == 0 && bmfh.bfReserved2 == 0))
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{ rc = -2000; goto GetOut; }
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// Read info header
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if (fread(&bmih, sizeof bmih, 1/*count*/, pfile) != 1)
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{ rc = -3; goto GetOut; }
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// Bogus info header check
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if (!(bmih.biSize == sizeof bmih && bmih.biPlanes == 1))
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{ fprintf(stderr, "invalid BMP file header\n"); rc = -3000; goto GetOut; }
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// Bogus bit depth? Only 8-bit supported.
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if (bmih.biBitCount != 8)
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{ fprintf(stderr, "BMP file not 8 bit\n"); rc = -4; goto GetOut; }
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// Bogus compression? Only non-compressed supported.
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if (bmih.biCompression != BI_RGB)
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{ fprintf(stderr, "invalid BMP compression type\n"); rc = -5; goto GetOut; }
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// Figure out how many entires are actually in the table
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if (bmih.biClrUsed == 0)
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{
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bmih.biClrUsed = 256;
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cbPalBytes = (1 << bmih.biBitCount) * sizeof( RGBQUAD );
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}
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else
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{
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cbPalBytes = bmih.biClrUsed * sizeof( RGBQUAD );
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}
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// Read palette (bmih.biClrUsed entries)
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if (fread(rgrgbPalette, cbPalBytes, 1/*count*/, pfile) != 1)
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{ rc = -6; goto GetOut; }
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// convert to a packed 768 byte palette
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pbPal = (unsigned char*)malloc(768);
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if (pbPal == NULL)
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{ rc = -7; goto GetOut; }
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pb = pbPal;
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// Copy over used entries
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for (i = 0; i < (int)bmih.biClrUsed; i++)
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{
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*pb++ = rgrgbPalette[i].rgbRed;
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*pb++ = rgrgbPalette[i].rgbGreen;
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*pb++ = rgrgbPalette[i].rgbBlue;
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}
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// Fill in unused entires will 0,0,0
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for (i = bmih.biClrUsed; i < 256; i++)
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{
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*pb++ = 0;
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*pb++ = 0;
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*pb++ = 0;
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}
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// Read bitmap bits (remainder of file)
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cbBmpBits = bmfh.bfSize - ftell(pfile);
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pb = (unsigned char*)malloc(cbBmpBits);
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if (fread(pb, cbBmpBits, 1/*count*/, pfile) != 1)
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{ rc = -7; goto GetOut; }
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pbBmpBits = (unsigned char*)malloc(cbBmpBits);
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// data is actually stored with the width being rounded up to a multiple of 4
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biTrueWidth = (bmih.biWidth + 3) & ~3;
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// reverse the order of the data.
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pb += (bmih.biHeight - 1) * biTrueWidth;
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for(i = 0; i < bmih.biHeight; i++)
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{
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memmove(&pbBmpBits[biTrueWidth * i], pb, biTrueWidth);
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pb -= biTrueWidth;
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}
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pb += biTrueWidth;
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free(pb);
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bmhd.w = (WORD)bmih.biWidth;
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bmhd.h = (WORD)bmih.biHeight;
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// Set output parameters
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*ppbPalette = pbPal;
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*ppbBits = pbBmpBits;
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GetOut:
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if (pfile)
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fclose(pfile);
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return rc;
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}
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int WriteBMPfile (char *szFile, byte *pbBits, int width, int height, byte *pbPalette)
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{
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int i, rc = 0;
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FILE *pfile = NULL;
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BITMAPFILEHEADER bmfh;
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BITMAPINFOHEADER bmih;
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RGBQUAD rgrgbPalette[256];
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ULONG cbBmpBits;
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BYTE* pbBmpBits;
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byte *pb, *pbPal = NULL;
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ULONG cbPalBytes;
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ULONG biTrueWidth;
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// Bogus parameter check
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if (!(pbPalette != NULL && pbBits != NULL))
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{ rc = -1000; goto GetOut; }
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// File exists?
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if ((pfile = fopen(szFile, "wb")) == NULL)
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{ rc = -1; goto GetOut; }
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biTrueWidth = ((width + 3) & ~3);
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cbBmpBits = biTrueWidth * height;
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cbPalBytes = 256 * sizeof( RGBQUAD );
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// Bogus file header check
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bmfh.bfType = MAKEWORD( 'B', 'M' );
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bmfh.bfSize = sizeof bmfh + sizeof bmih + cbBmpBits + cbPalBytes;
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bmfh.bfReserved1 = 0;
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bmfh.bfReserved2 = 0;
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bmfh.bfOffBits = sizeof bmfh + sizeof bmih + cbPalBytes;
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// Write file header
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if (fwrite(&bmfh, sizeof bmfh, 1/*count*/, pfile) != 1)
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{ rc = -2; goto GetOut; }
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// Size of structure
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bmih.biSize = sizeof bmih;
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// Width
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bmih.biWidth = biTrueWidth;
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// Height
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bmih.biHeight = height;
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// Only 1 plane
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bmih.biPlanes = 1;
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// Only 8-bit supported.
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bmih.biBitCount = 8;
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// Only non-compressed supported.
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bmih.biCompression = BI_RGB;
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bmih.biSizeImage = 0;
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// huh?
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bmih.biXPelsPerMeter = 0;
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bmih.biYPelsPerMeter = 0;
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// Always full palette
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bmih.biClrUsed = 256;
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bmih.biClrImportant = 0;
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// Write info header
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if (fwrite(&bmih, sizeof bmih, 1/*count*/, pfile) != 1)
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{ rc = -3; goto GetOut; }
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// convert to expanded palette
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pb = pbPalette;
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// Copy over used entries
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for (i = 0; i < (int)bmih.biClrUsed; i++)
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{
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rgrgbPalette[i].rgbRed = *pb++;
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rgrgbPalette[i].rgbGreen = *pb++;
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rgrgbPalette[i].rgbBlue = *pb++;
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rgrgbPalette[i].rgbReserved = 0;
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}
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// Write palette (bmih.biClrUsed entries)
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cbPalBytes = bmih.biClrUsed * sizeof( RGBQUAD );
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if (fwrite(rgrgbPalette, cbPalBytes, 1/*count*/, pfile) != 1)
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{ rc = -6; goto GetOut; }
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pbBmpBits = (unsigned char*)malloc(cbBmpBits);
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pb = pbBits;
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// reverse the order of the data.
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pb += (height - 1) * width;
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for(i = 0; i < bmih.biHeight; i++)
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{
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memmove(&pbBmpBits[biTrueWidth * i], pb, width);
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pb -= width;
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}
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// Write bitmap bits (remainder of file)
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if (fwrite(pbBmpBits, cbBmpBits, 1/*count*/, pfile) != 1)
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{ rc = -7; goto GetOut; }
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free(pbBmpBits);
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GetOut:
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if (pfile)
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fclose(pfile);
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return rc;
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}
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/*
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=================
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=
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= LoadLBM
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=
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=================
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*/
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void LoadLBM (char *filename, byte **picture, byte **palette)
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{
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byte *LBMbuffer, *picbuffer, *cmapbuffer;
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int y,p,planes;
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byte *LBM_P, *LBMEND_P;
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byte *pic_p;
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byte *body_p;
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unsigned rowsize;
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int formtype,formlength;
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int chunktype,chunklength;
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void (*mungecall) (int, byte *);
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// qiet compiler warnings
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picbuffer = NULL;
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cmapbuffer = NULL;
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mungecall = NULL;
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//
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// load the LBM
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//
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LoadFile (filename, (void **)&LBMbuffer);
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//
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// parse the LBM header
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//
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LBM_P = LBMbuffer;
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if ( *(int *)LBMbuffer != LittleLong(FORMID) )
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Error ("No FORM ID at start of file!\n");
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LBM_P += 4;
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formlength = BigLong( *(int *)LBM_P );
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LBM_P += 4;
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LBMEND_P = LBM_P + Align(formlength);
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formtype = LittleLong(*(int *)LBM_P);
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if (formtype != ILBMID && formtype != PBMID)
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Error ("Unrecognized form type: %c%c%c%c\n", formtype&0xff
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,(formtype>>8)&0xff,(formtype>>16)&0xff,(formtype>>24)&0xff);
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LBM_P += 4;
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//
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// parse chunks
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//
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while (LBM_P < LBMEND_P)
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{
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chunktype = LBM_P[0] + (LBM_P[1]<<8) + (LBM_P[2]<<16) + (LBM_P[3]<<24);
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LBM_P += 4;
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chunklength = LBM_P[3] + (LBM_P[2]<<8) + (LBM_P[1]<<16) + (LBM_P[0]<<24);
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LBM_P += 4;
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switch ( chunktype )
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{
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case BMHDID:
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memcpy (&bmhd,LBM_P,sizeof(bmhd));
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bmhd.w = BigShort(bmhd.w);
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bmhd.h = BigShort(bmhd.h);
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bmhd.x = BigShort(bmhd.x);
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bmhd.y = BigShort(bmhd.y);
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bmhd.pageWidth = BigShort(bmhd.pageWidth);
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bmhd.pageHeight = BigShort(bmhd.pageHeight);
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break;
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case CMAPID:
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cmapbuffer = (unsigned char*)malloc (768);
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memset (cmapbuffer, 0, 768);
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memcpy (cmapbuffer, LBM_P, chunklength);
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break;
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case BODYID:
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body_p = LBM_P;
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pic_p = picbuffer = (unsigned char*)malloc (bmhd.w*bmhd.h);
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if (formtype == PBMID)
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{
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//
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// unpack PBM
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//
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for (y=0 ; y<bmhd.h ; y++, pic_p += bmhd.w)
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{
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if (bmhd.compression == cm_rle1)
|
|
body_p = LBMRLEDecompress ((byte *)body_p
|
|
, pic_p , bmhd.w);
|
|
else if (bmhd.compression == cm_none)
|
|
{
|
|
memcpy (pic_p,body_p,bmhd.w);
|
|
body_p += Align(bmhd.w);
|
|
}
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// unpack ILBM
|
|
//
|
|
planes = bmhd.nPlanes;
|
|
if (bmhd.masking == ms_mask)
|
|
planes++;
|
|
rowsize = (bmhd.w+15)/16 * 2;
|
|
switch (bmhd.nPlanes)
|
|
{
|
|
case 1:
|
|
mungecall = MungeBitPlanes1;
|
|
break;
|
|
case 2:
|
|
mungecall = MungeBitPlanes2;
|
|
break;
|
|
case 4:
|
|
mungecall = MungeBitPlanes4;
|
|
break;
|
|
case 8:
|
|
mungecall = MungeBitPlanes8;
|
|
break;
|
|
default:
|
|
Error ("Can't munge %i bit planes!\n",bmhd.nPlanes);
|
|
}
|
|
|
|
for (y=0 ; y<bmhd.h ; y++, pic_p += bmhd.w)
|
|
{
|
|
for (p=0 ; p<planes ; p++)
|
|
if (bmhd.compression == cm_rle1)
|
|
body_p = LBMRLEDecompress ((byte *)body_p
|
|
, bitplanes[p] , rowsize);
|
|
else if (bmhd.compression == cm_none)
|
|
{
|
|
memcpy (bitplanes[p],body_p,rowsize);
|
|
body_p += rowsize;
|
|
}
|
|
|
|
mungecall (bmhd.w , pic_p);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
LBM_P += Align(chunklength);
|
|
}
|
|
|
|
free (LBMbuffer);
|
|
|
|
*picture = picbuffer;
|
|
*palette = cmapbuffer;
|
|
}
|
|
|
|
|
|
/*
|
|
============================================================================
|
|
|
|
WRITE LBM
|
|
|
|
============================================================================
|
|
*/
|
|
|
|
/*
|
|
==============
|
|
=
|
|
= WriteLBMfile
|
|
=
|
|
==============
|
|
*/
|
|
|
|
void WriteLBMfile (char *filename, byte *data, int width, int height, byte *palette)
|
|
{
|
|
byte *lbm, *lbmptr;
|
|
int *formlength, *bmhdlength, *cmaplength, *bodylength;
|
|
int length;
|
|
bmhd_t basebmhd;
|
|
|
|
lbm = lbmptr = (unsigned char*)malloc (width*height+1000);
|
|
|
|
//
|
|
// start FORM
|
|
//
|
|
*lbmptr++ = 'F';
|
|
*lbmptr++ = 'O';
|
|
*lbmptr++ = 'R';
|
|
*lbmptr++ = 'M';
|
|
|
|
formlength = (int*)lbmptr;
|
|
lbmptr+=4; // leave space for length
|
|
|
|
*lbmptr++ = 'P';
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = ' ';
|
|
|
|
//
|
|
// write BMHD
|
|
//
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = 'H';
|
|
*lbmptr++ = 'D';
|
|
|
|
bmhdlength = (int *)lbmptr;
|
|
lbmptr+=4; // leave space for length
|
|
|
|
memset (&basebmhd,0,sizeof(basebmhd));
|
|
basebmhd.w = BigShort((short)width);
|
|
basebmhd.h = BigShort((short)height);
|
|
basebmhd.nPlanes = (BYTE)BigShort(8);
|
|
basebmhd.xAspect = (BYTE)BigShort(5);
|
|
basebmhd.yAspect = (BYTE)BigShort(6);
|
|
basebmhd.pageWidth = BigShort((short)width);
|
|
basebmhd.pageHeight = BigShort((short)height);
|
|
|
|
memcpy (lbmptr,&basebmhd,sizeof(basebmhd));
|
|
lbmptr += sizeof(basebmhd);
|
|
|
|
length = lbmptr-(byte *)bmhdlength-4;
|
|
*bmhdlength = BigLong(length);
|
|
if (length&1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
//
|
|
// write CMAP
|
|
//
|
|
*lbmptr++ = 'C';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = 'A';
|
|
*lbmptr++ = 'P';
|
|
|
|
cmaplength = (int *)lbmptr;
|
|
lbmptr+=4; // leave space for length
|
|
|
|
memcpy (lbmptr,palette,768);
|
|
lbmptr += 768;
|
|
|
|
length = lbmptr-(byte *)cmaplength-4;
|
|
*cmaplength = BigLong(length);
|
|
if (length&1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
//
|
|
// write BODY
|
|
//
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'O';
|
|
*lbmptr++ = 'D';
|
|
*lbmptr++ = 'Y';
|
|
|
|
bodylength = (int *)lbmptr;
|
|
lbmptr+=4; // leave space for length
|
|
|
|
memcpy (lbmptr,data,width*height);
|
|
lbmptr += width*height;
|
|
|
|
length = lbmptr-(byte *)bodylength-4;
|
|
*bodylength = BigLong(length);
|
|
if (length&1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
//
|
|
// done
|
|
//
|
|
length = lbmptr-(byte *)formlength-4;
|
|
*formlength = BigLong(length);
|
|
if (length&1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
//
|
|
// write output file
|
|
//
|
|
SaveFile (filename, lbm, lbmptr-lbm);
|
|
free (lbm);
|
|
}
|
|
|