e89a598b31
This was done mainly to reduce the amount of occurences of the word FTexture but it immediately helped detect two small and mostly harmless bugs that were found due to the stricter type checks.
675 lines
17 KiB
C++
675 lines
17 KiB
C++
/*
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** pngtexture.cpp
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** Texture class for PNG images
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**
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**---------------------------------------------------------------------------
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** Copyright 2004-2007 Randy Heit
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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 "w_wad.h"
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#include "templates.h"
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#include "m_png.h"
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#include "bitmap.h"
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#include "v_palette.h"
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#include "textures/textures.h"
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//==========================================================================
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//
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// A PNG texture
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//
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//==========================================================================
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class FPNGTexture : public FWorldTexture
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{
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public:
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FPNGTexture (FileReader &lump, int lumpnum, const FString &filename, int width, int height, uint8_t bitdepth, uint8_t colortype, uint8_t interlace);
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~FPNGTexture();
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FTextureFormat GetFormat () override;
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int CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCopyInfo *inf = NULL) override;
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bool UseBasePalette() override;
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uint8_t *MakeTexture(FRenderStyle style) override;
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protected:
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void ReadAlphaRemap(FileReader *lump, uint8_t *alpharemap);
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FString SourceFile;
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FileReader fr;
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uint8_t BitDepth;
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uint8_t ColorType;
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uint8_t Interlace;
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bool HaveTrans;
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uint16_t NonPaletteTrans[3];
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uint8_t *PaletteMap = nullptr;
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int PaletteSize = 0;
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uint32_t StartOfIDAT = 0;
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uint32_t StartOfPalette = 0;
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};
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FTexture *PNGTexture_TryCreate(FileReader & data, int lumpnum)
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{
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union
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{
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uint32_t dw;
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uint16_t w[2];
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uint8_t b[4];
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} first4bytes;
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// This is most likely a PNG, but make sure. (Note that if the
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// first 4 bytes match, but later bytes don't, we assume it's
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// a corrupt PNG.)
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data.Seek(0, FileReader::SeekSet);
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if (data.Read (first4bytes.b, 4) != 4) return NULL;
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if (first4bytes.dw != MAKE_ID(137,'P','N','G')) return NULL;
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if (data.Read (first4bytes.b, 4) != 4) return NULL;
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if (first4bytes.dw != MAKE_ID(13,10,26,10)) return NULL;
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if (data.Read (first4bytes.b, 4) != 4) return NULL;
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if (first4bytes.dw != MAKE_ID(0,0,0,13)) return NULL;
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if (data.Read (first4bytes.b, 4) != 4) return NULL;
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if (first4bytes.dw != MAKE_ID('I','H','D','R')) return NULL;
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// The PNG looks valid so far. Check the IHDR to make sure it's a
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// type of PNG we support.
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int width = data.ReadInt32BE();
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int height = data.ReadInt32BE();
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uint8_t bitdepth = data.ReadUInt8();
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uint8_t colortype = data.ReadUInt8();
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uint8_t compression = data.ReadUInt8();
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uint8_t filter = data.ReadUInt8();
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uint8_t interlace = data.ReadUInt8();
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if (compression != 0 || filter != 0 || interlace > 1)
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{
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return NULL;
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}
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if (!((1 << colortype) & 0x5D))
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{
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return NULL;
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}
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if (!((1 << bitdepth) & 0x116))
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{
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return NULL;
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}
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// Just for completeness, make sure the PNG has something more than an IHDR.
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data.Seek (4, FileReader::SeekSet);
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data.Read (first4bytes.b, 4);
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if (first4bytes.dw == 0)
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{
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data.Read (first4bytes.b, 4);
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if (first4bytes.dw == MAKE_ID('I','E','N','D'))
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{
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return NULL;
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}
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}
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return new FPNGTexture (data, lumpnum, FString(), width, height, bitdepth, colortype, interlace);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FTexture *PNGTexture_CreateFromFile(PNGHandle *png, const FString &filename)
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{
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if (M_FindPNGChunk(png, MAKE_ID('I','H','D','R')) == 0)
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{
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return NULL;
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}
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// Check the IHDR to make sure it's a type of PNG we support.
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auto &data = png->File;
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int width = data.ReadInt32BE();
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int height = data.ReadInt32BE();
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uint8_t bitdepth = data.ReadUInt8();
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uint8_t colortype = data.ReadUInt8();
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uint8_t compression = data.ReadUInt8();
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uint8_t filter = data.ReadUInt8();
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uint8_t interlace = data.ReadUInt8();
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if (compression != 0 || filter != 0 || interlace > 1)
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{
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return NULL;
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}
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if (!((1 << colortype) & 0x5D))
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{
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return NULL;
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}
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if (!((1 << bitdepth) & 0x116))
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{
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return NULL;
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}
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return new FPNGTexture (png->File, -1, filename, width, height, bitdepth, colortype, interlace);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FPNGTexture::FPNGTexture (FileReader &lump, int lumpnum, const FString &filename, int width, int height,
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uint8_t depth, uint8_t colortype, uint8_t interlace)
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: FWorldTexture(NULL, lumpnum), SourceFile(filename),
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BitDepth(depth), ColorType(colortype), Interlace(interlace), HaveTrans(false)
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{
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union
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{
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uint32_t palette[256];
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uint8_t pngpal[256][3];
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} p;
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uint8_t trans[256];
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uint32_t len, id;
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int i;
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UseType = ETextureType::MiscPatch;
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LeftOffset = 0;
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TopOffset = 0;
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bMasked = false;
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Width = width;
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Height = height;
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CalcBitSize ();
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memset(trans, 255, 256);
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// Parse pre-IDAT chunks. I skip the CRCs. Is that bad?
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lump.Seek(33, FileReader::SeekSet);
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lump.Read(&len, 4);
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lump.Read(&id, 4);
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while (id != MAKE_ID('I','D','A','T') && id != MAKE_ID('I','E','N','D'))
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{
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len = BigLong((unsigned int)len);
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switch (id)
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{
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default:
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lump.Seek (len, FileReader::SeekCur);
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break;
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case MAKE_ID('g','r','A','b'):
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// This is like GRAB found in an ILBM, except coordinates use 4 bytes
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{
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uint32_t hotx, hoty;
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int ihotx, ihoty;
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lump.Read(&hotx, 4);
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lump.Read(&hoty, 4);
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ihotx = BigLong((int)hotx);
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ihoty = BigLong((int)hoty);
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if (ihotx < -32768 || ihotx > 32767)
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{
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Printf ("X-Offset for PNG texture %s is bad: %d (0x%08x)\n", Wads.GetLumpFullName (lumpnum), ihotx, ihotx);
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ihotx = 0;
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}
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if (ihoty < -32768 || ihoty > 32767)
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{
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Printf ("Y-Offset for PNG texture %s is bad: %d (0x%08x)\n", Wads.GetLumpFullName (lumpnum), ihoty, ihoty);
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ihoty = 0;
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}
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LeftOffset = ihotx;
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TopOffset = ihoty;
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}
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break;
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case MAKE_ID('P','L','T','E'):
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PaletteSize = MIN<int> (len / 3, 256);
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StartOfPalette = (uint32_t)lump.Tell();
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lump.Read (p.pngpal, PaletteSize * 3);
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if (PaletteSize * 3 != (int)len)
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{
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lump.Seek (len - PaletteSize * 3, FileReader::SeekCur);
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}
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for (i = PaletteSize - 1; i >= 0; --i)
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{
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p.palette[i] = MAKERGB(p.pngpal[i][0], p.pngpal[i][1], p.pngpal[i][2]);
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}
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break;
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case MAKE_ID('t','R','N','S'):
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lump.Read (trans, len);
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HaveTrans = true;
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// Save for colortype 2
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NonPaletteTrans[0] = uint16_t(trans[0] * 256 + trans[1]);
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NonPaletteTrans[1] = uint16_t(trans[2] * 256 + trans[3]);
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NonPaletteTrans[2] = uint16_t(trans[4] * 256 + trans[5]);
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break;
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}
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lump.Seek(4, FileReader::SeekCur); // Skip CRC
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lump.Read(&len, 4);
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id = MAKE_ID('I','E','N','D');
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lump.Read(&id, 4);
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}
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StartOfIDAT = (uint32_t)lump.Tell() - 8;
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switch (colortype)
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{
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case 4: // Grayscale + Alpha
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bMasked = true;
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// intentional fall-through
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case 0: // Grayscale
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if (colortype == 0 && HaveTrans && NonPaletteTrans[0] < 256)
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{
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bMasked = true;
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PaletteSize = 256;
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PaletteMap = new uint8_t[256];
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memcpy (PaletteMap, GrayMap, 256);
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PaletteMap[NonPaletteTrans[0]] = 0;
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}
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else
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{
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PaletteMap = GrayMap;
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}
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break;
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case 3: // Paletted
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PaletteMap = new uint8_t[PaletteSize];
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GPalette.MakeRemap (p.palette, PaletteMap, trans, PaletteSize);
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for (i = 0; i < PaletteSize; ++i)
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{
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if (trans[i] == 0)
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{
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bMasked = true;
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PaletteMap[i] = 0;
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}
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}
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break;
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case 6: // RGB + Alpha
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bMasked = true;
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break;
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case 2: // RGB
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bMasked = HaveTrans;
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break;
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}
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// If this is a savegame we must keep the reader.
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if (lumpnum == -1) fr = std::move(lump);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FPNGTexture::~FPNGTexture ()
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{
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if (PaletteMap != nullptr && PaletteMap != FTexture::GrayMap)
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{
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delete[] PaletteMap;
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PaletteMap = nullptr;
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}
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FTextureFormat FPNGTexture::GetFormat()
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{
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#if 0
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switch (ColorType)
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{
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case 3: return TEX_Pal;
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case 0: return TEX_Gray;
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default: return TEX_RGB;
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}
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#else
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// For now, create a true color texture to preserve all colors.
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return TEX_RGB;
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#endif
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void FPNGTexture::ReadAlphaRemap(FileReader *lump, uint8_t *alpharemap)
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{
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auto p = lump->Tell();
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lump->Seek(StartOfPalette, FileReader::SeekSet);
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for (int i = 0; i < PaletteSize; i++)
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{
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uint8_t r = lump->ReadUInt8();
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uint8_t g = lump->ReadUInt8();
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uint8_t b = lump->ReadUInt8();
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alpharemap[i] = PaletteMap[i] == 0 ? 0 : Luminance(r, g, b);
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}
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lump->Seek(p, FileReader::SeekSet);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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uint8_t *FPNGTexture::MakeTexture (FRenderStyle style)
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{
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FileReader *lump;
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FileReader lfr;
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bool alphatex = !!(style.Flags & STYLEF_RedIsAlpha);
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if (SourceLump >= 0)
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{
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lfr = Wads.OpenLumpReader(SourceLump);
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lump = 𝔩
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}
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else
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{
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lump = &fr;
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}
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auto Pixels = new uint8_t[Width*Height];
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if (StartOfIDAT == 0)
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{
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memset (Pixels, 0x99, Width*Height);
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}
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else
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{
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uint32_t len, id;
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lump->Seek (StartOfIDAT, FileReader::SeekSet);
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lump->Read(&len, 4);
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lump->Read(&id, 4);
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if (ColorType == 0 || ColorType == 3) /* Grayscale and paletted */
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{
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M_ReadIDAT (*lump, Pixels, Width, Height, Width, BitDepth, ColorType, Interlace, BigLong((unsigned int)len));
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if (Width == Height)
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{
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if (!alphatex)
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{
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FTexture::FlipSquareBlockRemap (Pixels, Width, Height, PaletteMap);
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}
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else if (ColorType == 0)
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{
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FTexture::FlipSquareBlock (Pixels, Width, Height);
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}
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else
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{
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uint8_t alpharemap[256];
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ReadAlphaRemap(lump, alpharemap);
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FTexture::FlipSquareBlockRemap(Pixels, Width, Height, alpharemap);
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}
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}
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else
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{
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uint8_t *newpix = new uint8_t[Width*Height];
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if (!alphatex)
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{
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FTexture::FlipNonSquareBlockRemap (newpix, Pixels, Width, Height, Width, PaletteMap);
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}
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else if (ColorType == 0)
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{
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FTexture::FlipNonSquareBlock (newpix, Pixels, Width, Height, Width);
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}
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else
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{
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uint8_t alpharemap[256];
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ReadAlphaRemap(lump, alpharemap);
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FTexture::FlipNonSquareBlockRemap(newpix, Pixels, Width, Height, Width, alpharemap);
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}
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uint8_t *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 /* RGB and/or Alpha present */
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{
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int bytesPerPixel = ColorType == 2 ? 3 : ColorType == 4 ? 2 : 4;
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uint8_t *tempix = new uint8_t[Width * Height * bytesPerPixel];
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uint8_t *in, *out;
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int x, y, pitch, backstep;
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M_ReadIDAT (*lump, tempix, Width, Height, Width*bytesPerPixel, BitDepth, ColorType, Interlace, BigLong((unsigned int)len));
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in = tempix;
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out = Pixels;
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// Convert from source format to paletted, column-major.
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// Formats with alpha maps are reduced to only 1 bit of alpha.
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switch (ColorType)
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{
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case 2: // RGB
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pitch = Width * 3;
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backstep = Height * pitch - 3;
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for (x = Width; x > 0; --x)
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{
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for (y = Height; y > 0; --y)
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{
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if (HaveTrans && in[0] == NonPaletteTrans[0] && in[1] == NonPaletteTrans[1] && in[2] == NonPaletteTrans[2])
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{
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*out++ = 0;
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}
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else
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{
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*out++ = RGBToPalette(alphatex, in[0], in[1], in[2]);
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}
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in += pitch;
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}
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in -= backstep;
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}
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break;
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case 4: // Grayscale + Alpha
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pitch = Width * 2;
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backstep = Height * pitch - 2;
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for (x = Width; x > 0; --x)
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{
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for (y = Height; y > 0; --y)
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{
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*out++ = alphatex? ((in[0] * in[1]) / 255) : in[1] < 128 ? 0 : PaletteMap[in[0]];
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in += pitch;
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}
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in -= backstep;
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}
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break;
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case 6: // RGB + Alpha
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pitch = Width * 4;
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backstep = Height * pitch - 4;
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for (x = Width; x > 0; --x)
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{
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for (y = Height; y > 0; --y)
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{
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*out++ = RGBToPalette(alphatex, in[0], in[1], in[2], in[3]);
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in += pitch;
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}
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in -= backstep;
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}
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break;
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}
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delete[] tempix;
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}
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}
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return Pixels;
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|
}
|
|
|
|
//===========================================================================
|
|
//
|
|
// FPNGTexture::CopyTrueColorPixels
|
|
//
|
|
//===========================================================================
|
|
|
|
int FPNGTexture::CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCopyInfo *inf)
|
|
{
|
|
// Parse pre-IDAT chunks. I skip the CRCs. Is that bad?
|
|
PalEntry pe[256];
|
|
uint32_t len, id;
|
|
static char bpp[] = {1, 0, 3, 1, 2, 0, 4};
|
|
int pixwidth = Width * bpp[ColorType];
|
|
int transpal = false;
|
|
|
|
FileReader *lump;
|
|
FileReader lfr;
|
|
|
|
if (SourceLump >= 0)
|
|
{
|
|
lfr = Wads.OpenLumpReader(SourceLump);
|
|
lump = 𝔩
|
|
}
|
|
else
|
|
{
|
|
lump = &fr;
|
|
}
|
|
|
|
lump->Seek(33, FileReader::SeekSet);
|
|
for(int i = 0; i < 256; i++) // default to a gray map
|
|
pe[i] = PalEntry(255,i,i,i);
|
|
|
|
lump->Read(&len, 4);
|
|
lump->Read(&id, 4);
|
|
while (id != MAKE_ID('I','D','A','T') && id != MAKE_ID('I','E','N','D'))
|
|
{
|
|
len = BigLong((unsigned int)len);
|
|
switch (id)
|
|
{
|
|
default:
|
|
lump->Seek (len, FileReader::SeekCur);
|
|
break;
|
|
|
|
case MAKE_ID('P','L','T','E'):
|
|
for(int i = 0; i < PaletteSize; i++)
|
|
{
|
|
pe[i].r = lump->ReadUInt8();
|
|
pe[i].g = lump->ReadUInt8();
|
|
pe[i].b = lump->ReadUInt8();
|
|
}
|
|
break;
|
|
|
|
case MAKE_ID('t','R','N','S'):
|
|
if (ColorType == 3)
|
|
{
|
|
for(uint32_t i = 0; i < len; i++)
|
|
{
|
|
pe[i].a = lump->ReadUInt8();
|
|
if (pe[i].a != 0 && pe[i].a != 255)
|
|
transpal = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lump->Seek(len, FileReader::SeekCur);
|
|
}
|
|
break;
|
|
}
|
|
lump->Seek(4, FileReader::SeekCur); // Skip CRC
|
|
lump->Read(&len, 4);
|
|
id = MAKE_ID('I','E','N','D');
|
|
lump->Read(&id, 4);
|
|
}
|
|
|
|
if (ColorType == 0 && HaveTrans && NonPaletteTrans[0] < 256)
|
|
{
|
|
pe[NonPaletteTrans[0]].a = 0;
|
|
transpal = true;
|
|
}
|
|
|
|
uint8_t * Pixels = new uint8_t[pixwidth * Height];
|
|
|
|
lump->Seek (StartOfIDAT, FileReader::SeekSet);
|
|
lump->Read(&len, 4);
|
|
lump->Read(&id, 4);
|
|
M_ReadIDAT (*lump, Pixels, Width, Height, pixwidth, BitDepth, ColorType, Interlace, BigLong((unsigned int)len));
|
|
|
|
switch (ColorType)
|
|
{
|
|
case 0:
|
|
case 3:
|
|
bmp->CopyPixelData(x, y, Pixels, Width, Height, 1, Width, rotate, pe, inf);
|
|
break;
|
|
|
|
case 2:
|
|
if (!HaveTrans)
|
|
{
|
|
bmp->CopyPixelDataRGB(x, y, Pixels, Width, Height, 3, pixwidth, rotate, CF_RGB, inf);
|
|
}
|
|
else
|
|
{
|
|
bmp->CopyPixelDataRGB(x, y, Pixels, Width, Height, 3, pixwidth, rotate, CF_RGBT, inf,
|
|
NonPaletteTrans[0], NonPaletteTrans[1], NonPaletteTrans[2]);
|
|
transpal = true;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
bmp->CopyPixelDataRGB(x, y, Pixels, Width, Height, 2, pixwidth, rotate, CF_IA, inf);
|
|
transpal = -1;
|
|
break;
|
|
|
|
case 6:
|
|
bmp->CopyPixelDataRGB(x, y, Pixels, Width, Height, 4, pixwidth, rotate, CF_RGBA, inf);
|
|
transpal = -1;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
}
|
|
delete[] Pixels;
|
|
return transpal;
|
|
}
|
|
|
|
|
|
//===========================================================================
|
|
//
|
|
// This doesn't check if the palette is identical with the base palette
|
|
// I don't think it's worth the hassle because it's only of importance
|
|
// when compositing multipatch textures.
|
|
//
|
|
//===========================================================================
|
|
|
|
bool FPNGTexture::UseBasePalette()
|
|
{
|
|
return false;
|
|
}
|