gzdoom-gles/src/textures/pcxtexture.cpp

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/*
** pcxtexture.cpp
** Texture class for PCX images
**
**---------------------------------------------------------------------------
** Copyright 2005 David HENRY
** Copyright 2006 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/
#include "doomtype.h"
#include "files.h"
#include "w_wad.h"
#include "templates.h"
#include "bitmap.h"
#include "colormatcher.h"
#include "v_video.h"
#include "textures/textures.h"
//==========================================================================
//
// PCX file header
//
//==========================================================================
#pragma pack(1)
struct PCXHeader
{
uint8_t manufacturer;
uint8_t version;
uint8_t encoding;
uint8_t bitsPerPixel;
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uint16_t xmin, ymin;
uint16_t xmax, ymax;
uint16_t horzRes, vertRes;
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uint8_t palette[48];
uint8_t reserved;
uint8_t numColorPlanes;
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uint16_t bytesPerScanLine;
uint16_t paletteType;
uint16_t horzSize, vertSize;
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uint8_t padding[54];
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} FORCE_PACKED;
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#pragma pack()
//==========================================================================
//
// a PCX texture
//
//==========================================================================
class FPCXTexture : public FWorldTexture
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{
public:
FPCXTexture (int lumpnum, PCXHeader &);
FTextureFormat GetFormat () override;
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int CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCopyInfo *inf = NULL) override;
bool UseBasePalette() override;
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protected:
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void ReadPCX1bit (uint8_t *dst, FileReader & lump, PCXHeader *hdr);
void ReadPCX4bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr);
void ReadPCX8bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr);
void ReadPCX24bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr, int planes);
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uint8_t *MakeTexture (FRenderStyle style) override;
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};
//==========================================================================
//
//
//
//==========================================================================
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FTexture * PCXTexture_TryCreate(FileReader & file, int lumpnum)
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{
PCXHeader hdr;
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file.Seek(0, FileReader::SeekSet);
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if (file.Read(&hdr, sizeof(hdr)) != sizeof(hdr))
{
return NULL;
}
hdr.xmin = LittleShort(hdr.xmin);
hdr.xmax = LittleShort(hdr.xmax);
hdr.bytesPerScanLine = LittleShort(hdr.bytesPerScanLine);
if (hdr.manufacturer != 10 || hdr.encoding != 1) return NULL;
if (hdr.version != 0 && hdr.version != 2 && hdr.version != 3 && hdr.version != 4 && hdr.version != 5) return NULL;
if (hdr.bitsPerPixel != 1 && hdr.bitsPerPixel != 8) return NULL;
if (hdr.bitsPerPixel == 1 && hdr.numColorPlanes !=1 && hdr.numColorPlanes != 4) return NULL;
if (hdr.bitsPerPixel == 8 && hdr.bytesPerScanLine != ((hdr.xmax - hdr.xmin + 2)&~1)) return NULL;
for (int i = 0; i < 54; i++)
{
if (hdr.padding[i] != 0) return NULL;
}
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file.Seek(0, FileReader::SeekSet);
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file.Read(&hdr, sizeof(hdr));
return new FPCXTexture(lumpnum, hdr);
}
//==========================================================================
//
//
//
//==========================================================================
FPCXTexture::FPCXTexture(int lumpnum, PCXHeader & hdr)
: FWorldTexture(NULL, lumpnum)
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{
bMasked = false;
Width = LittleShort(hdr.xmax) - LittleShort(hdr.xmin) + 1;
Height = LittleShort(hdr.ymax) - LittleShort(hdr.ymin) + 1;
CalcBitSize();
}
//==========================================================================
//
//
//
//==========================================================================
FTextureFormat FPCXTexture::GetFormat()
{
return TEX_RGB;
}
//==========================================================================
//
//
//
//==========================================================================
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void FPCXTexture::ReadPCX1bit (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
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{
int y, i, bytes;
int rle_count = 0;
uint8_t rle_value = 0;
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uint8_t * srcp = new uint8_t[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp;
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for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
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bytes = hdr->bytesPerScanLine;
while (bytes--)
{
if (rle_count == 0)
{
if ( (rle_value = *src++) < 0xc0)
{
rle_count = 1;
}
else
{
rle_count = rle_value - 0xc0;
rle_value = *src++;
}
}
rle_count--;
for (i = 7; i >= 0; --i, ptr ++)
{
*ptr = ((rle_value & (1 << i)) > 0);
}
}
}
delete [] srcp;
}
//==========================================================================
//
//
//
//==========================================================================
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void FPCXTexture::ReadPCX4bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
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{
int rle_count = 0, rle_value = 0;
int x, y, c;
int bytes;
uint8_t * line = new uint8_t[hdr->bytesPerScanLine];
uint8_t * colorIndex = new uint8_t[Width];
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uint8_t * srcp = new uint8_t[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp;
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for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
memset (ptr, 0, Width * sizeof (uint8_t));
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for (c = 0; c < 4; ++c)
{
uint8_t * pLine = line;
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bytes = hdr->bytesPerScanLine;
while (bytes--)
{
if (rle_count == 0)
{
if ( (rle_value = *src++) < 0xc0)
{
rle_count = 1;
}
else
{
rle_count = rle_value - 0xc0;
rle_value = *src++;
}
}
rle_count--;
*(pLine++) = rle_value;
}
/* compute line's color indexes */
for (x = 0; x < Width; ++x)
{
if (line[x / 8] & (128 >> (x % 8)))
ptr[x] += (1 << c);
}
}
}
/* release memory */
delete [] colorIndex;
delete [] line;
delete [] srcp;
}
//==========================================================================
//
//
//
//==========================================================================
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void FPCXTexture::ReadPCX8bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
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{
int rle_count = 0, rle_value = 0;
int y, bytes;
uint8_t * srcp = new uint8_t[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp;
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for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
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bytes = hdr->bytesPerScanLine;
while (bytes--)
{
if (rle_count == 0)
{
if( (rle_value = *src++) < 0xc0)
{
rle_count = 1;
}
else
{
rle_count = rle_value - 0xc0;
rle_value = *src++;
}
}
rle_count--;
*ptr++ = rle_value;
}
}
delete [] srcp;
}
//==========================================================================
//
//
//
//==========================================================================
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void FPCXTexture::ReadPCX24bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr, int planes)
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{
int rle_count = 0, rle_value = 0;
int y, c;
int bytes;
uint8_t * srcp = new uint8_t[lump.GetLength() - sizeof(PCXHeader)];
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lump.Read(srcp, lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp;
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for (y = 0; y < Height; ++y)
{
/* for each color plane */
for (c = 0; c < planes; ++c)
{
uint8_t * ptr = &dst[y * Width * planes];
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bytes = hdr->bytesPerScanLine;
while (bytes--)
{
if (rle_count == 0)
{
if( (rle_value = *src++) < 0xc0)
{
rle_count = 1;
}
else
{
rle_count = rle_value - 0xc0;
rle_value = *src++;
}
}
rle_count--;
ptr[c] = (uint8_t)rle_value;
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ptr += planes;
}
}
}
delete [] srcp;
}
//==========================================================================
//
//
//
//==========================================================================
uint8_t *FPCXTexture::MakeTexture(FRenderStyle style)
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{
uint8_t PaletteMap[256];
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PCXHeader header;
int bitcount;
bool alphatex = !!(style.Flags & STYLEF_RedIsAlpha);
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auto lump = Wads.OpenLumpReader(SourceLump);
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lump.Read(&header, sizeof(header));
bitcount = header.bitsPerPixel * header.numColorPlanes;
auto Pixels = new uint8_t[Width*Height];
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if (bitcount < 24)
{
if (bitcount < 8)
{
for (int i=0;i<16;i++)
{
if (!alphatex) PaletteMap[i] = ColorMatcher.Pick(header.palette[i * 3], header.palette[i * 3 + 1], header.palette[i * 3 + 2]);
else PaletteMap[i] = header.palette[i * 3];
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}
switch (bitcount)
{
default:
case 1:
ReadPCX1bit (Pixels, lump, &header);
break;
case 4:
ReadPCX4bits (Pixels, lump, &header);
break;
}
}
else if (bitcount == 8)
{
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lump.Seek(-769, FileReader::SeekEnd);
uint8_t c = lump.ReadUInt8();
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//if (c !=0x0c) memcpy(PaletteMap, GrayMap, 256); // Fallback for files without palette
//else
for(int i=0;i<256;i++)
{
uint8_t r = lump.ReadUInt8();
uint8_t g = lump.ReadUInt8();
uint8_t b = lump.ReadUInt8();
PaletteMap[i] = !alphatex? ColorMatcher.Pick(r,g,b) : r;
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}
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lump.Seek(sizeof(header), FileReader::SeekSet);
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ReadPCX8bits (Pixels, lump, &header);
}
if (Width == Height)
{
FlipSquareBlockRemap(Pixels, Width, Height, PaletteMap);
}
else
{
uint8_t *newpix = new uint8_t[Width*Height];
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FlipNonSquareBlockRemap (newpix, Pixels, Width, Height, Width, PaletteMap);
uint8_t *oldpix = Pixels;
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Pixels = newpix;
delete[] oldpix;
}
}
else
{
uint8_t * buffer = new uint8_t[Width*Height * 3];
uint8_t * row = buffer;
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ReadPCX24bits (buffer, lump, &header, 3);
for(int y=0; y<Height; y++)
{
for(int x=0; x < Width; x++)
{
Pixels[y + Height * x] = !alphatex? RGB256k.RGB[row[0] >> 2][row[1] >> 2][row[2] >> 2] : row[0];
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row+=3;
}
}
delete [] buffer;
}
return Pixels;
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}
//===========================================================================
//
// FPCXTexture::CopyTrueColorPixels
//
// Preserves the full color information (unlike software mode)
//
//===========================================================================
int FPCXTexture::CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCopyInfo *inf)
{
PalEntry pe[256];
PCXHeader header;
int bitcount;
uint8_t * Pixels;
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auto lump = Wads.OpenLumpReader(SourceLump);
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lump.Read(&header, sizeof(header));
bitcount = header.bitsPerPixel * header.numColorPlanes;
if (bitcount < 24)
{
Pixels = new uint8_t[Width*Height];
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if (bitcount < 8)
{
for (int i=0;i<16;i++)
{
pe[i] = PalEntry(header.palette[i*3],header.palette[i*3+1],header.palette[i*3+2]);
}
switch (bitcount)
{
default:
case 1:
ReadPCX1bit (Pixels, lump, &header);
break;
case 4:
ReadPCX4bits (Pixels, lump, &header);
break;
}
}
else if (bitcount == 8)
{
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lump.Seek(-769, FileReader::SeekEnd);
uint8_t c = lump.ReadUInt8();
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c=0x0c; // Apparently there's many non-compliant PCXs out there...
if (c !=0x0c)
{
for(int i=0;i<256;i++) pe[i]=PalEntry(255,i,i,i); // default to a gray map
}
else for(int i=0;i<256;i++)
{
uint8_t r = lump.ReadUInt8();
uint8_t g = lump.ReadUInt8();
uint8_t b = lump.ReadUInt8();
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pe[i] = PalEntry(255, r,g,b);
}
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lump.Seek(sizeof(header), FileReader::SeekSet);
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ReadPCX8bits (Pixels, lump, &header);
}
bmp->CopyPixelData(x, y, Pixels, Width, Height, 1, Width, rotate, pe, inf);
}
else
{
Pixels = new uint8_t[Width*Height * 3];
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ReadPCX24bits (Pixels, lump, &header, 3);
bmp->CopyPixelDataRGB(x, y, Pixels, Width, Height, 3, Width*3, rotate, CF_RGB, inf);
}
delete [] Pixels;
return 0;
}
//===========================================================================
//
//
//===========================================================================
bool FPCXTexture::UseBasePalette()
{
return false;
}