raze-gles/source/common/textures/formats/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 "basics.h"
#include "files.h"
#include "bitmap.h"
#include "image.h"
#include "cache1d.h"
//==========================================================================
//
// PCX file header
//
//==========================================================================
#pragma pack(1)
struct PCXHeader
{
uint8_t manufacturer;
uint8_t version;
uint8_t encoding;
uint8_t bitsPerPixel;
uint16_t xmin, ymin;
uint16_t xmax, ymax;
uint16_t horzRes, vertRes;
uint8_t palette[48];
uint8_t reserved;
uint8_t numColorPlanes;
uint16_t bytesPerScanLine;
uint16_t paletteType;
uint16_t horzSize, vertSize;
uint8_t padding[54];
} FORCE_PACKED;
#pragma pack()
//==========================================================================
//
// a PCX texture
//
//==========================================================================
class FPCXTexture : public FImageSource
{
public:
FPCXTexture (PCXHeader &);
int CopyPixels(FBitmap *bmp, int conversion) override;
protected:
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);
};
//==========================================================================
//
//
//
//==========================================================================
FImageSource * PCXImage_TryCreate(FileReader & file)
{
PCXHeader hdr;
file.Seek(0, FileReader::SeekSet);
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 && hdr.bitsPerPixel != 4) 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;
}
file.Seek(0, FileReader::SeekSet);
file.Read(&hdr, sizeof(hdr));
return new FPCXTexture(hdr);
}
//==========================================================================
//
//
//
//==========================================================================
FPCXTexture::FPCXTexture(PCXHeader & hdr)
{
bMasked = false;
Width = LittleShort(hdr.xmax) - LittleShort(hdr.xmin) + 1;
Height = LittleShort(hdr.ymax) - LittleShort(hdr.ymin) + 1;
}
//==========================================================================
//
//
//
//==========================================================================
void FPCXTexture::ReadPCX1bit (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
{
int y, i, bytes;
int rle_count = 0;
uint8_t rle_value = 0;
TArray<uint8_t> srcp = lump.Read(lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp.Data();
for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
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 ++)
{
// This can overflow for the last byte if not checked.
if (ptr < dst+Width*Height)
*ptr = ((rle_value & (1 << i)) > 0);
}
}
}
}
//==========================================================================
//
//
//
//==========================================================================
void FPCXTexture::ReadPCX4bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
{
int rle_count = 0, rle_value = 0;
int x, y, c;
int bytes;
TArray<uint8_t> line(hdr->bytesPerScanLine, true);
TArray<uint8_t> colorIndex(Width, true);
TArray<uint8_t> srcp = lump.Read(lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp.Data();
for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
memset (ptr, 0, Width * sizeof (uint8_t));
for (c = 0; c < 4; ++c)
{
uint8_t * pLine = line.Data();
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);
}
}
}
//==========================================================================
//
//
//
//==========================================================================
void FPCXTexture::ReadPCX8bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr)
{
int rle_count = 0, rle_value = 0;
int y, bytes;
auto srcp = lump.Read(lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp.Data();
for (y = 0; y < Height; ++y)
{
uint8_t * ptr = &dst[y * Width];
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;
}
}
}
//==========================================================================
//
//
//
//==========================================================================
void FPCXTexture::ReadPCX24bits (uint8_t *dst, FileReader & lump, PCXHeader *hdr, int planes)
{
int rle_count = 0, rle_value = 0;
int y, c;
int bytes;
auto srcp = lump.Read(lump.GetLength() - sizeof(PCXHeader));
uint8_t * src = srcp.Data();
for (y = 0; y < Height; ++y)
{
/* for each color plane */
for (c = 0; c < planes; ++c)
{
uint8_t * ptr = &dst[y * Width * planes];
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;
ptr += planes;
}
}
}
}
//===========================================================================
//
// FPCXTexture::CopyPixels
//
// Preserves the full color information (unlike software mode)
//
//===========================================================================
int FPCXTexture::CopyPixels(FBitmap *bmp, int conversion)
{
PalEntry pe[256];
PCXHeader header;
int bitcount;
TArray<uint8_t> Pixels;
auto lump = kopenFileReader(Name, 0);
if (!lump.isOpen()) return -1; // Just leave the texture blank.
lump.Read(&header, sizeof(header));
bitcount = header.bitsPerPixel * header.numColorPlanes;
if (bitcount < 24)
{
Pixels.Resize(Width*Height);
if (bitcount < 8)
{
switch (bitcount)
{
default:
case 1:
pe[0] = PalEntry(255, 0, 0, 0);
pe[1] = PalEntry(255, 255, 255, 255);
ReadPCX1bit (Pixels.Data(), lump, &header);
break;
case 4:
for (int i = 0; i<16; i++)
{
pe[i] = PalEntry(255, header.palette[i * 3], header.palette[i * 3 + 1], header.palette[i * 3 + 2]);
}
ReadPCX4bits (Pixels.Data(), lump, &header);
break;
}
}
else if (bitcount == 8)
{
lump.Seek(-769, FileReader::SeekEnd);
uint8_t c = lump.ReadUInt8();
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();
pe[i] = PalEntry(255, r,g,b);
}
lump.Seek(sizeof(header), FileReader::SeekSet);
ReadPCX8bits (Pixels.Data(), lump, &header);
}
bmp->CopyPixelData(0, 0, Pixels.Data(), Width, Height, 1, Width, 0, pe);
}
else
{
Pixels.Resize(Width*Height*4);
ReadPCX24bits (Pixels.Data(), lump, &header, 3);
bmp->CopyPixelDataRGB(0, 0, Pixels.Data(), Width, Height, 3, Width*3, 0, CF_RGB);
}
return 0;
}