mirror of
https://github.com/ZDoom/gzdoom-gles.git
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402 lines
8.9 KiB
C++
402 lines
8.9 KiB
C++
/*
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** pcxtexture.cpp
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** Texture class for PCX images
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**
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**---------------------------------------------------------------------------
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** Copyright 2005 David HENRY
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** Copyright 2006 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include "doomtype.h"
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#include "files.h"
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#include "r_local.h"
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#include "w_wad.h"
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#include "templates.h"
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bool FPCXTexture::Check(FileReader & file)
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{
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PCXHeader hdr;
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file.Seek(0, SEEK_SET);
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file.Read(&hdr, sizeof(hdr));
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#ifdef WORDS_BIGENDIAN
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hdr.xmin = LittleShort(hdr.xmin);
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hdr.xmax = LittleShort(hdr.xmax);
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hdr.bytesPerScanLine = LittleShort(hdr.bytesPerScanLine);
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#endif
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if (hdr.manufacturer != 10 || hdr.encoding != 1) return false;
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if (hdr.version != 0 && hdr.version != 2 && hdr.version != 3 && hdr.version != 4 && hdr.version != 5) return false;
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if (hdr.bitsPerPixel != 1 && hdr.bitsPerPixel != 8) return false;
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if (hdr.bitsPerPixel == 1 && hdr.numColorPlanes !=1 && hdr.numColorPlanes != 4) return false;
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if (hdr.bitsPerPixel == 8 && hdr.bytesPerScanLine != ((hdr.xmax - hdr.xmin + 2)&~1)) return false;
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for (int i = 0; i < 54; i++)
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{
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if (hdr.padding[i] != 0) return false;
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}
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return true;
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}
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FTexture * FPCXTexture::Create(FileReader & file, int lumpnum)
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{
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PCXHeader hdr;
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file.Seek(0, SEEK_SET);
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file.Read(&hdr, sizeof(hdr));
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return new FPCXTexture(lumpnum, hdr);
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}
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FPCXTexture::FPCXTexture(int lumpnum, PCXHeader & hdr)
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: SourceLump(lumpnum), Pixels(0)
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{
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Wads.GetLumpName (Name, lumpnum);
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Name[8] = 0;
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bMasked = false;
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Width = LittleShort(hdr.xmax) - LittleShort(hdr.xmin) + 1;
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Height = LittleShort(hdr.ymax) - LittleShort(hdr.ymin) + 1;
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CalcBitSize();
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DummySpans[0].TopOffset = 0;
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DummySpans[0].Length = Height;
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DummySpans[1].TopOffset = 0;
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DummySpans[1].Length = 0;
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}
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FPCXTexture::~FPCXTexture ()
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{
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Unload ();
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}
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void FPCXTexture::Unload ()
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{
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if (Pixels != NULL)
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{
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delete[] Pixels;
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Pixels = NULL;
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}
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}
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const BYTE *FPCXTexture::GetColumn (unsigned int column, const Span **spans_out)
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{
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if (Pixels == NULL)
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{
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MakeTexture ();
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}
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if ((unsigned)column >= (unsigned)Width)
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{
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if (WidthMask + 1 == Width)
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{
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column &= WidthMask;
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}
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else
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{
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column %= Width;
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}
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}
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if (spans_out != NULL)
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{
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*spans_out = DummySpans;
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}
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return Pixels + column*Height;
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}
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const BYTE *FPCXTexture::GetPixels ()
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{
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if (Pixels == NULL)
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{
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MakeTexture ();
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}
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return Pixels;
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}
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void FPCXTexture::ReadPCX1bit (BYTE *dst, FileReader & lump, PCXHeader *hdr)
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{
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int y, i, bytes;
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int rle_count = 0;
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BYTE rle_value = 0;
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BYTE * srcp = new BYTE[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
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BYTE * src = srcp;
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for (y = 0; y < Height; ++y)
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{
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BYTE * ptr = &dst[y * Width];
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bytes = hdr->bytesPerScanLine;
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while (bytes--)
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{
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if (rle_count == 0)
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{
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if ( (rle_value = *src++) < 0xc0)
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{
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rle_count = 1;
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}
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else
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{
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rle_count = rle_value - 0xc0;
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rle_value = *src++;
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}
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}
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rle_count--;
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for (i = 7; i >= 0; --i, ptr ++)
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{
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*ptr = ((rle_value & (1 << i)) > 0);
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}
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}
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}
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delete [] srcp;
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}
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void FPCXTexture::ReadPCX4bits (BYTE *dst, FileReader & lump, PCXHeader *hdr)
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{
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int rle_count = 0, rle_value = 0;
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int x, y, c;
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int bytes;
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BYTE * line = new BYTE[hdr->bytesPerScanLine];
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BYTE * colorIndex = new BYTE[Width];
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BYTE * srcp = new BYTE[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
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BYTE * src = srcp;
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for (y = 0; y < Height; ++y)
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{
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BYTE * ptr = &dst[y * Width];
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memset (ptr, 0, Width * sizeof (BYTE));
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for (c = 0; c < 4; ++c)
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{
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BYTE * pLine = line;
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bytes = hdr->bytesPerScanLine;
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while (bytes--)
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{
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if (rle_count == 0)
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{
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if ( (rle_value = *src++) < 0xc0)
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{
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rle_count = 1;
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}
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else
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{
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rle_count = rle_value - 0xc0;
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rle_value = *src++;
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}
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}
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rle_count--;
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*(pLine++) = rle_value;
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}
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/* compute line's color indexes */
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for (x = 0; x < Width; ++x)
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{
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if (line[x / 8] & (128 >> (x % 8)))
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ptr[x] += (1 << c);
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}
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}
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}
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/* release memory */
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delete [] colorIndex;
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delete [] line;
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delete [] srcp;
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}
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void FPCXTexture::ReadPCX8bits (BYTE *dst, FileReader & lump, PCXHeader *hdr)
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{
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int rle_count = 0, rle_value = 0;
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int y, bytes;
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BYTE * srcp = new BYTE[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
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BYTE * src = srcp;
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for (y = 0; y < Height; ++y)
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{
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BYTE * ptr = &dst[y * Width];
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bytes = hdr->bytesPerScanLine;
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while (bytes--)
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{
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if (rle_count == 0)
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{
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if( (rle_value = *src++) < 0xc0)
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{
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rle_count = 1;
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}
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else
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{
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rle_count = rle_value - 0xc0;
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rle_value = *src++;
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}
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}
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rle_count--;
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*ptr++ = rle_value;
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}
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}
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delete [] srcp;
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}
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void FPCXTexture::ReadPCX24bits (BYTE *dst, FileReader & lump, PCXHeader *hdr, int planes)
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{
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int rle_count = 0, rle_value = 0;
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int y, c;
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int bytes;
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BYTE * srcp = new BYTE[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
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BYTE * src = srcp;
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for (y = 0; y < Height; ++y)
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{
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/* for each color plane */
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for (c = 0; c < planes; ++c)
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{
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BYTE * ptr = &dst[y * Width * planes];
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bytes = hdr->bytesPerScanLine;
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while (bytes--)
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{
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if (rle_count == 0)
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{
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if( (rle_value = *src++) < 0xc0)
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{
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rle_count = 1;
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}
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else
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{
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rle_count = rle_value - 0xc0;
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rle_value = *src++;
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}
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}
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rle_count--;
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ptr[c] = (BYTE)rle_value;
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ptr += planes;
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}
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}
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}
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delete [] srcp;
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}
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void FPCXTexture::MakeTexture()
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{
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BYTE PaletteMap[256];
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PCXHeader header;
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int bitcount;
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FWadLump lump = Wads.OpenLumpNum(SourceLump);
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lump.Read(&header, sizeof(header));
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bitcount = header.bitsPerPixel * header.numColorPlanes;
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Pixels = new BYTE[Width*Height];
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if (bitcount < 24)
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{
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if (bitcount < 8)
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{
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for (int i=0;i<16;i++)
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{
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PaletteMap[i] = ColorMatcher.Pick(header.palette[i*3],header.palette[i*3+1],header.palette[i*3+2]);
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}
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switch (bitcount)
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{
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default:
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case 1:
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ReadPCX1bit (Pixels, lump, &header);
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break;
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case 4:
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ReadPCX4bits (Pixels, lump, &header);
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break;
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}
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}
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else if (bitcount == 8)
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{
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BYTE c;
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lump.Seek(-769, SEEK_END);
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lump >> c;
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if (c !=0x0c) memcpy(PaletteMap, GrayMap, 256); // Fallback for files without palette
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else for(int i=0;i<256;i++)
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{
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BYTE r,g,b;
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lump >> r >> g >> b;
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PaletteMap[i] = ColorMatcher.Pick(r,g,b);
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}
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lump.Seek(sizeof(header), SEEK_SET);
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ReadPCX8bits (Pixels, lump, &header);
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}
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if (Width == Height)
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{
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FlipSquareBlockRemap(Pixels, Width, Height, PaletteMap);
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}
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else
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{
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BYTE *newpix = new BYTE[Width*Height];
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FlipNonSquareBlockRemap (newpix, Pixels, Width, Height, PaletteMap);
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BYTE *oldpix = Pixels;
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Pixels = newpix;
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delete[] oldpix;
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}
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}
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else
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{
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BYTE * buffer = new BYTE[Width*Height * 3];
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BYTE * row = buffer;
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ReadPCX24bits (buffer, lump, &header, 3);
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for(int y=0; y<Height; y++)
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{
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for(int x=0; x < Width; x++)
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{
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Pixels[y+Height*x] = RGB32k[row[0]>>3][row[1]>>3][row[2]>>3];
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row+=3;
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}
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}
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delete [] buffer;
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}
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}
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