mirror of
https://github.com/DrBeef/Raze.git
synced 2024-11-16 09:21:12 +00:00
305 lines
8.8 KiB
C++
305 lines
8.8 KiB
C++
/*
|
|
** patchtexture.cpp
|
|
** Texture class for single Doom patches
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** 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 "image.h"
|
|
#include "imagehelpers.h"
|
|
|
|
|
|
// posts are runs of non masked source pixels
|
|
struct column_t
|
|
{
|
|
uint8_t topdelta; // -1 is the last post in a column
|
|
uint8_t length; // length data bytes follows
|
|
};
|
|
|
|
bool checkPatchForAlpha(const void *buffer, uint32_t length);
|
|
|
|
//==========================================================================
|
|
//
|
|
// A texture that is just a single Doom format patch
|
|
//
|
|
//==========================================================================
|
|
|
|
class FPatchTexture : public FImageSource
|
|
{
|
|
bool badflag = false;
|
|
bool isalpha = false;
|
|
public:
|
|
FPatchTexture (int lumpnum, int w, int h, int lo, int to, bool isalphatex);
|
|
TArray<uint8_t> CreatePalettedPixels(int conversion) override;
|
|
int CopyPixels(FBitmap *bmp, int conversion) override;
|
|
bool SupportRemap0() override { return !badflag; }
|
|
void DetectBadPatches();
|
|
};
|
|
|
|
//==========================================================================
|
|
//
|
|
// Checks if the currently open lump can be a Doom patch
|
|
//
|
|
//==========================================================================
|
|
|
|
static bool CheckIfPatch(FileReader & file, bool &isalpha)
|
|
{
|
|
if (file.GetLength() < 13) return false; // minimum length of a valid Doom patch
|
|
|
|
file.Seek(0, FileReader::SeekSet);
|
|
auto data = file.Read(file.GetLength());
|
|
|
|
const patch_t *foo = (const patch_t *)data.Data();
|
|
|
|
int height = LittleShort(foo->height);
|
|
int width = LittleShort(foo->width);
|
|
|
|
if (height > 0 && height <= 2048 && width > 0 && width <= 2048 && width < file.GetLength()/4)
|
|
{
|
|
// 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 >= (uint32_t)(file.GetLength())) // Need one byte for an empty column (but there's patches that don't know that!)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
if (!gapAtStart)
|
|
{
|
|
// only check this if the texture passed validation.
|
|
// Here is a good point because we already have a valid buffer of the lump's data.
|
|
isalpha = checkPatchForAlpha(data.Data(), (uint32_t)file.GetLength());
|
|
}
|
|
return !gapAtStart;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
FImageSource *PatchImage_TryCreate(FileReader & file, int lumpnum)
|
|
{
|
|
bool isalpha;
|
|
|
|
if (!CheckIfPatch(file, isalpha)) return NULL;
|
|
file.Seek(0, FileReader::SeekSet);
|
|
int width = file.ReadUInt16();
|
|
int height = file.ReadUInt16();
|
|
int leftoffset = file.ReadInt16();
|
|
int topoffset = file.ReadInt16();
|
|
return new FPatchTexture(lumpnum, width, height, leftoffset, topoffset, isalpha);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
FPatchTexture::FPatchTexture (int lumpnum, int w, int h, int lo, int to, bool isalphatex)
|
|
: FImageSource(lumpnum)
|
|
{
|
|
bUseGamePalette = !isalphatex;
|
|
isalpha = isalphatex;
|
|
Width = w;
|
|
Height = h;
|
|
LeftOffset = lo;
|
|
TopOffset = to;
|
|
DetectBadPatches();
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
TArray<uint8_t> FPatchTexture::CreatePalettedPixels(int conversion)
|
|
{
|
|
uint8_t *remap, remaptable[256];
|
|
int numspans;
|
|
const column_t *maxcol;
|
|
int x;
|
|
|
|
FileData lump = fileSystem.ReadFile (SourceLump);
|
|
const patch_t *patch = (const patch_t *)lump.GetMem();
|
|
|
|
maxcol = (const column_t *)((const uint8_t *)patch + fileSystem.FileLength (SourceLump) - 3);
|
|
|
|
remap = ImageHelpers::GetRemap(conversion == luminance, isalpha);
|
|
// Special case for skies
|
|
if (conversion == noremap0 && remap == GPalette.Remap)
|
|
{
|
|
memcpy(remaptable, GPalette.Remap, 256);
|
|
remaptable[0] = 0;
|
|
remap = remaptable;
|
|
}
|
|
|
|
if (badflag)
|
|
{
|
|
TArray<uint8_t> Pixels(Width * Height, true);
|
|
uint8_t *out;
|
|
|
|
// Draw the image to the buffer
|
|
for (x = 0, out = Pixels.Data(); x < Width; ++x)
|
|
{
|
|
const uint8_t *in = (const uint8_t *)patch + LittleLong(patch->columnofs[x]) + 3;
|
|
|
|
for (int y = Height; y > 0; --y)
|
|
{
|
|
*out = remap[*in];
|
|
out++, in++;
|
|
}
|
|
}
|
|
return Pixels;
|
|
}
|
|
|
|
int numpix = Width * Height;
|
|
|
|
numspans = Width;
|
|
|
|
TArray<uint8_t> Pixels(numpix, true);
|
|
memset (Pixels.Data(), 0, numpix);
|
|
|
|
// Draw the image to the buffer
|
|
for (x = 0; x < Width; ++x)
|
|
{
|
|
uint8_t *outtop = Pixels.Data() + x*Height;
|
|
const column_t *column = (const column_t *)((const uint8_t *)patch + LittleLong(patch->columnofs[x]));
|
|
int top = -1;
|
|
|
|
while (column < maxcol && column->topdelta != 0xFF)
|
|
{
|
|
if (column->topdelta <= top)
|
|
{
|
|
top += column->topdelta;
|
|
}
|
|
else
|
|
{
|
|
top = column->topdelta;
|
|
}
|
|
|
|
int len = column->length;
|
|
uint8_t *out = outtop + top;
|
|
|
|
if (len != 0)
|
|
{
|
|
if (top + len > Height) // Clip posts that extend past the bottom
|
|
{
|
|
len = Height - top;
|
|
}
|
|
if (len > 0)
|
|
{
|
|
numspans++;
|
|
|
|
const uint8_t *in = (const uint8_t *)column + 3;
|
|
for (int i = 0; i < len; ++i)
|
|
{
|
|
out[i] = remap[in[i]];
|
|
}
|
|
}
|
|
}
|
|
column = (const column_t *)((const uint8_t *)column + column->length + 4);
|
|
}
|
|
}
|
|
return Pixels;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
int FPatchTexture::CopyPixels(FBitmap *bmp, int conversion)
|
|
{
|
|
if (!isalpha) return FImageSource::CopyPixels(bmp, conversion);
|
|
else return CopyTranslatedPixels(bmp, GPalette.GrayscaleMap.Palette);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Fix for certain special patches on single-patch textures.
|
|
//
|
|
//==========================================================================
|
|
|
|
void FPatchTexture::DetectBadPatches ()
|
|
{
|
|
// The patch must look like it is large enough for the rules to apply to avoid using this on truly empty patches.
|
|
if (fileSystem.FileLength(SourceLump) < Width * Height / 2) return;
|
|
|
|
// Check if this patch is likely to be a problem.
|
|
// It must be 256 pixels tall, and all its columns must have exactly
|
|
// one post, where each post has a supposed length of 0.
|
|
FileData lump = fileSystem.ReadFile (SourceLump);
|
|
const patch_t *realpatch = (patch_t *)lump.GetMem();
|
|
const uint32_t *cofs = realpatch->columnofs;
|
|
int x, x2 = LittleShort(realpatch->width);
|
|
|
|
if (LittleShort(realpatch->height) == 256)
|
|
{
|
|
for (x = 0; x < x2; ++x)
|
|
{
|
|
const column_t *col = (column_t*)((uint8_t*)realpatch+LittleLong(cofs[x]));
|
|
if (col->topdelta != 0 || col->length != 0)
|
|
{
|
|
return; // It's not bad!
|
|
}
|
|
col = (column_t *)((uint8_t *)col + 256 + 4);
|
|
if (col->topdelta != 0xFF)
|
|
{
|
|
return; // More than one post in a column!
|
|
}
|
|
}
|
|
LeftOffset = 0;
|
|
TopOffset = 0;
|
|
badflag = true;
|
|
bMasked = false; // Hacked textures don't have transparent parts.
|
|
}
|
|
}
|