raze-gles/source/common/textures/formats/rawpagetexture.cpp

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/*
** rawpagetexture.cpp
** Texture class for Raven's raw fullscreen pages
**
**---------------------------------------------------------------------------
** Copyright 2004-2006 Randy Heit
** 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 "files.h"
#include "filesystem.h"
#include "bitmap.h"
#include "imagehelpers.h"
#include "image.h"
//==========================================================================
//
// A raw 320x200 graphic used by Heretic and Hexen fullscreen images
//
//==========================================================================
class FRawPageTexture : public FImageSource
{
int mPaletteLump = -1;
public:
FRawPageTexture (int lumpnum);
TArray<uint8_t> CreatePalettedPixels(int conversion) override;
int CopyPixels(FBitmap *bmp, int conversion) override;
};
//==========================================================================
//
// RAW textures must be exactly 64000 bytes long and not be identifiable
// as Doom patch
//
//==========================================================================
static bool CheckIfRaw(FileReader & data)
{
if (data.GetLength() != 64000) return false;
// This is probably a raw page graphic, but do some checking to be sure
patch_t *foo;
int height;
int width;
data.Seek(0, FileReader::SeekSet);
auto bits = data.Read(data.GetLength());
foo = (patch_t *)bits.Data();;
height = LittleShort(foo->height);
width = LittleShort(foo->width);
if (height > 0 && height < 510 && width > 0 && width < 15997)
{
// The dimensions seem like they might be valid for a patch, so
// check the column directory for extra security. At least one
// column must begin exactly at the end of the column directory,
// and none of them must point past the end of the patch.
bool gapAtStart = true;
int x;
for (x = 0; x < width; ++x)
{
uint32_t ofs = LittleLong(foo->columnofs[x]);
if (ofs == (uint32_t)width * 4 + 8)
{
gapAtStart = false;
}
else if (ofs >= 64000-1) // Need one byte for an empty column
{
return true;
}
else
{
// Ensure this column does not extend beyond the end of the patch
const uint8_t *foo2 = (const uint8_t *)foo;
while (ofs < 64000)
{
if (foo2[ofs] == 255)
{
return true;
}
ofs += foo2[ofs+1] + 4;
}
if (ofs >= 64000)
{
return true;
}
}
}
if (gapAtStart || (x != width))
{
return true;
}
return false;
}
else
{
return true;
}
}
//==========================================================================
//
//
//
//==========================================================================
FImageSource *RawPageImage_TryCreate(FileReader & file, int lumpnum)
{
if (!CheckIfRaw(file)) return nullptr;
return new FRawPageTexture(lumpnum);
}
//==========================================================================
//
//
//
//==========================================================================
FRawPageTexture::FRawPageTexture (int lumpnum)
: FImageSource(lumpnum)
{
Width = 320;
Height = 200;
// Special case hack for Heretic's E2 end pic. This is not going to be exposed as an editing feature because the implications would be horrible.
FString Name;
fileSystem.GetFileShortName(Name, lumpnum);
if (Name.CompareNoCase("E2END") == 0)
{
mPaletteLump = fileSystem.CheckNumForName("E2PAL");
if (fileSystem.FileLength(mPaletteLump) < 768) mPaletteLump = -1;
}
else bUseGamePalette = true;
}
//==========================================================================
//
//
//
//==========================================================================
TArray<uint8_t> FRawPageTexture::CreatePalettedPixels(int conversion)
{
FileData lump = fileSystem.ReadFile (SourceLump);
const uint8_t *source = (const uint8_t *)lump.GetMem();
const uint8_t *source_p = source;
uint8_t *dest_p;
TArray<uint8_t> Pixels(Width*Height, true);
dest_p = Pixels.Data();
const uint8_t *remap = ImageHelpers::GetRemap(conversion == luminance);
// This does not handle the custom palette.
// User maps are encouraged to use a real image format when replacing E2END and the original could never be used anywhere else.
// Convert the source image from row-major to column-major format
for (int y = 200; y != 0; --y)
{
for (int x = 320; x != 0; --x)
{
*dest_p = remap[*source_p];
dest_p += 200;
source_p++;
}
dest_p -= 200 * 320 - 1;
}
return Pixels;
}
int FRawPageTexture::CopyPixels(FBitmap *bmp, int conversion)
{
if (mPaletteLump < 0) return FImageSource::CopyPixels(bmp, conversion);
else
{
FileData lump = fileSystem.ReadFile(SourceLump);
FileData plump = fileSystem.ReadFile(mPaletteLump);
const uint8_t *source = (const uint8_t *)lump.GetMem();
const uint8_t *psource = (const uint8_t *)plump.GetMem();
PalEntry paldata[256];
for (auto & pe : paldata)
{
pe.r = *psource++;
pe.g = *psource++;
pe.b = *psource++;
pe.a = 255;
}
bmp->CopyPixelData(0, 0, source, 320, 200, 1, 320, 0, paldata);
}
return 0;
}