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raze-gles/source/common/textures/formats/pngtexture.cpp
Christoph Oelckers 7109ce4e30 - made some changes to the font and texture system to allow late loading of the palette. 
The base palette can be set via .def files so that the engine has no access to it until the entire game state is set up.
This means that font translations and PNG palette remap tables cannot be built when the owning objects are created.
For PNGs this has the added advantage that they only get done when really required and not unconditionally - most of the time the remap table isn't even needed here.

Thid fixes the slider graphics in the option menus.

# Conflicts:
#	source/core/gamecontrol.cpp

# Conflicts:
#	source/core/gamecontrol.cpp
2020-05-26 21:43:32 +02:00

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/*
** pngtexture.cpp
** Texture class for PNG images
**
**---------------------------------------------------------------------------
** Copyright 2004-2007 Randy Heit
** Copyright 2005-2019 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 "files.h"
#include "templates.h"
#include "m_png.h"
#include "bitmap.h"
#include "imagehelpers.h"
#include "image.h"
#include "printf.h"
#include "texturemanager.h"
#include "filesystem.h"
//==========================================================================
//
// A PNG texture
//
//==========================================================================
class FPNGTexture : public FImageSource
{
public:
FPNGTexture (FileReader &lump, int lumpnum, int width, int height, uint8_t bitdepth, uint8_t colortype, uint8_t interlace);
int CopyPixels(FBitmap *bmp, int conversion) override;
TArray<uint8_t> CreatePalettedPixels(int conversion) override;
protected:
void ReadAlphaRemap(FileReader *lump, uint8_t *alpharemap);
void SetupPalette(FileReader &lump);
uint8_t BitDepth;
uint8_t ColorType;
uint8_t Interlace;
bool HaveTrans;
uint16_t NonPaletteTrans[3];
uint8_t *PaletteMap = nullptr;
int PaletteSize = 0;
uint32_t StartOfIDAT = 0;
uint32_t StartOfPalette = 0;
};
//==========================================================================
//
//
//
//==========================================================================
FImageSource *PNGImage_TryCreate(FileReader & data, int lumpnum)
{
union
{
uint32_t dw;
uint16_t w[2];
uint8_t b[4];
} first4bytes;
// This is most likely a PNG, but make sure. (Note that if the
// first 4 bytes match, but later bytes don't, we assume it's
// a corrupt PNG.)
data.Seek(0, FileReader::SeekSet);
if (data.Read (first4bytes.b, 4) != 4) return NULL;
if (first4bytes.dw != MAKE_ID(137,'P','N','G')) return NULL;
if (data.Read (first4bytes.b, 4) != 4) return NULL;
if (first4bytes.dw != MAKE_ID(13,10,26,10)) return NULL;
if (data.Read (first4bytes.b, 4) != 4) return NULL;
if (first4bytes.dw != MAKE_ID(0,0,0,13)) return NULL;
if (data.Read (first4bytes.b, 4) != 4) return NULL;
if (first4bytes.dw != MAKE_ID('I','H','D','R')) return NULL;
// The PNG looks valid so far. Check the IHDR to make sure it's a
// type of PNG we support.
int width = data.ReadInt32BE();
int height = data.ReadInt32BE();
uint8_t bitdepth = data.ReadUInt8();
uint8_t colortype = data.ReadUInt8();
uint8_t compression = data.ReadUInt8();
uint8_t filter = data.ReadUInt8();
uint8_t interlace = data.ReadUInt8();
if (compression != 0 || filter != 0 || interlace > 1)
{
return NULL;
}
if (!((1 << colortype) & 0x5D))
{
return NULL;
}
if (!((1 << bitdepth) & 0x116))
{
return NULL;
}
// Just for completeness, make sure the PNG has something more than an IHDR.
data.Seek (4, FileReader::SeekSet);
data.Read (first4bytes.b, 4);
if (first4bytes.dw == 0)
{
data.Read (first4bytes.b, 4);
if (first4bytes.dw == MAKE_ID('I','E','N','D'))
{
return NULL;
}
}
return new FPNGTexture (data, lumpnum, width, height, bitdepth, colortype, interlace);
}
//==========================================================================
//
//
//
//==========================================================================
FPNGTexture::FPNGTexture (FileReader &lump, int lumpnum, int width, int height,
uint8_t depth, uint8_t colortype, uint8_t interlace)
: FImageSource(lumpnum),
BitDepth(depth), ColorType(colortype), Interlace(interlace), HaveTrans(false)
{
uint8_t trans[256];
uint32_t len, id;
int i;
bMasked = false;
Width = width;
Height = height;
memset(trans, 255, 256);
// Parse pre-IDAT chunks. I skip the CRCs. Is that bad?
lump.Seek(33, FileReader::SeekSet);
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('g','r','A','b'):
// This is like GRAB found in an ILBM, except coordinates use 4 bytes
{
uint32_t hotx, hoty;
int ihotx, ihoty;
lump.Read(&hotx, 4);
lump.Read(&hoty, 4);
ihotx = BigLong((int)hotx);
ihoty = BigLong((int)hoty);
if (ihotx < -32768 || ihotx > 32767)
{
Printf ("X-Offset for PNG texture %s is bad: %d (0x%08x)\n", fileSystem.GetFileFullName (lumpnum), ihotx, ihotx);
ihotx = 0;
}
if (ihoty < -32768 || ihoty > 32767)
{
Printf ("Y-Offset for PNG texture %s is bad: %d (0x%08x)\n", fileSystem.GetFileFullName (lumpnum), ihoty, ihoty);
ihoty = 0;
}
LeftOffset = ihotx;
TopOffset = ihoty;
}
break;
case MAKE_ID('P','L','T','E'):
PaletteSize = MIN<int> (len / 3, 256);
StartOfPalette = (uint32_t)lump.Tell();
lump.Seek(len, FileReader::SeekCur);
break;
case MAKE_ID('t','R','N','S'):
lump.Read (trans, len);
HaveTrans = true;
// Save for colortype 2
NonPaletteTrans[0] = uint16_t(trans[0] * 256 + trans[1]);
NonPaletteTrans[1] = uint16_t(trans[2] * 256 + trans[3]);
NonPaletteTrans[2] = uint16_t(trans[4] * 256 + trans[5]);
break;
}
lump.Seek(4, FileReader::SeekCur); // Skip CRC
lump.Read(&len, 4);
id = MAKE_ID('I','E','N','D');
lump.Read(&id, 4);
}
StartOfIDAT = (uint32_t)lump.Tell() - 8;
switch (colortype)
{
case 4: // Grayscale + Alpha
bMasked = true;
// intentional fall-through
case 0: // Grayscale
if (colortype == 0 && HaveTrans && NonPaletteTrans[0] < 256)
{
bMasked = true;
PaletteSize = 256;
}
else
{
PaletteMap = GPalette.GrayMap;
}
break;
case 3: // Paletted
for (i = 0; i < PaletteSize; ++i)
{
if (trans[i] == 0)
{
bMasked = true;
}
}
break;
case 6: // RGB + Alpha
bMasked = true;
break;
case 2: // RGB
bMasked = HaveTrans;
break;
}
}
void FPNGTexture::SetupPalette(FileReader &lump)
{
union
{
uint32_t palette[256];
uint8_t pngpal[256][3];
} p;
uint8_t trans[256];
uint32_t len, id;
int i;
auto pos = lump.Tell();
memset(trans, 255, 256);
// Parse pre-IDAT chunks. I skip the CRCs. Is that bad?
lump.Seek(33, FileReader::SeekSet);
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'):
lump.Read(p.pngpal, PaletteSize * 3);
if (PaletteSize * 3 != (int)len)
{
lump.Seek(len - PaletteSize * 3, FileReader::SeekCur);
}
for (i = PaletteSize - 1; i >= 0; --i)
{
p.palette[i] = MAKERGB(p.pngpal[i][0], p.pngpal[i][1], p.pngpal[i][2]);
}
break;
case MAKE_ID('t', 'R', 'N', 'S'):
lump.Read(trans, len);
break;
}
lump.Seek(4, FileReader::SeekCur); // Skip CRC
lump.Read(&len, 4);
id = MAKE_ID('I', 'E', 'N', 'D');
lump.Read(&id, 4);
}
StartOfIDAT = (uint32_t)lump.Tell() - 8;
switch (ColorType)
{
case 0: // Grayscale
if (HaveTrans && NonPaletteTrans[0] < 256)
{
PaletteMap = (uint8_t*)ImageArena.Alloc(PaletteSize);
memcpy(PaletteMap, GPalette.GrayMap, 256);
PaletteMap[NonPaletteTrans[0]] = 0;
}
break;
case 3: // Paletted
PaletteMap = (uint8_t*)ImageArena.Alloc(PaletteSize);
MakeRemap((uint32_t*)GPalette.BaseColors, p.palette, PaletteMap, trans, PaletteSize);
for (i = 0; i < PaletteSize; ++i)
{
if (trans[i] == 0)
{
PaletteMap[i] = 0;
}
}
break;
default:
break;
}
lump.Seek(pos, FileReader::SeekSet);
}
//==========================================================================
//
//
//
//==========================================================================
void FPNGTexture::ReadAlphaRemap(FileReader *lump, uint8_t *alpharemap)
{
auto p = lump->Tell();
lump->Seek(StartOfPalette, FileReader::SeekSet);
for (int i = 0; i < PaletteSize; i++)
{
uint8_t r = lump->ReadUInt8();
uint8_t g = lump->ReadUInt8();
uint8_t b = lump->ReadUInt8();
alpharemap[i] = PaletteMap[i] == 0 ? 0 : Luminance(r, g, b);
}
lump->Seek(p, FileReader::SeekSet);
}
//==========================================================================
//
//
//
//==========================================================================
TArray<uint8_t> FPNGTexture::CreatePalettedPixels(int conversion)
{
FileReader *lump;
FileReader lfr;
lfr = fileSystem.OpenFileReader(SourceLump);
lump = &lfr;
TArray<uint8_t> Pixels(Width*Height, true);
if (StartOfIDAT == 0)
{
memset (Pixels.Data(), 0x99, Width*Height);
}
else
{
uint32_t len, id;
lump->Seek (StartOfIDAT, FileReader::SeekSet);
lump->Read(&len, 4);
lump->Read(&id, 4);
bool alphatex = conversion == luminance;
if (ColorType == 0 || ColorType == 3) /* Grayscale and paletted */
{
M_ReadIDAT (*lump, Pixels.Data(), Width, Height, Width, BitDepth, ColorType, Interlace, BigLong((unsigned int)len));
if (Width == Height)
{
if (conversion != luminance)
{
if (!PaletteMap) SetupPalette(lfr);
ImageHelpers::FlipSquareBlockRemap (Pixels.Data(), Width, PaletteMap);
}
else if (ColorType == 0)
{
ImageHelpers::FlipSquareBlock (Pixels.Data(), Width);
}
else
{
uint8_t alpharemap[256];
ReadAlphaRemap(lump, alpharemap);
ImageHelpers::FlipSquareBlockRemap(Pixels.Data(), Width, alpharemap);
}
}
else
{
TArray<uint8_t> newpix(Width*Height, true);
if (conversion != luminance)
{
if (!PaletteMap) SetupPalette(lfr);
ImageHelpers::FlipNonSquareBlockRemap (newpix.Data(), Pixels.Data(), Width, Height, Width, PaletteMap);
}
else if (ColorType == 0)
{
ImageHelpers::FlipNonSquareBlock (newpix.Data(), Pixels.Data(), Width, Height, Width);
}
else
{
uint8_t alpharemap[256];
ReadAlphaRemap(lump, alpharemap);
ImageHelpers::FlipNonSquareBlockRemap(newpix.Data(), Pixels.Data(), Width, Height, Width, alpharemap);
}
return newpix;
}
}
else /* RGB and/or Alpha present */
{
int bytesPerPixel = ColorType == 2 ? 3 : ColorType == 4 ? 2 : 4;
uint8_t *tempix = new uint8_t[Width * Height * bytesPerPixel];
uint8_t *in, *out;
int x, y, pitch, backstep;
M_ReadIDAT (*lump, tempix, Width, Height, Width*bytesPerPixel, BitDepth, ColorType, Interlace, BigLong((unsigned int)len));
in = tempix;
out = Pixels.Data();
// Convert from source format to paletted, column-major.
// Formats with alpha maps are reduced to only 1 bit of alpha.
switch (ColorType)
{
case 2: // RGB
pitch = Width * 3;
backstep = Height * pitch - 3;
for (x = Width; x > 0; --x)
{
for (y = Height; y > 0; --y)
{
if (HaveTrans && in[0] == NonPaletteTrans[0] && in[1] == NonPaletteTrans[1] && in[2] == NonPaletteTrans[2])
{
*out++ = 0;
}
else
{
*out++ = ImageHelpers::RGBToPalette(alphatex, in[0], in[1], in[2]);
}
in += pitch;
}
in -= backstep;
}
break;
case 4: // Grayscale + Alpha
pitch = Width * 2;
backstep = Height * pitch - 2;
if (!PaletteMap) SetupPalette(lfr);
for (x = Width; x > 0; --x)
{
for (y = Height; y > 0; --y)
{
*out++ = alphatex? ((in[0] * in[1]) / 255) : in[1] < 128 ? 0 : PaletteMap[in[0]];
in += pitch;
}
in -= backstep;
}
break;
case 6: // RGB + Alpha
pitch = Width * 4;
backstep = Height * pitch - 4;
for (x = Width; x > 0; --x)
{
for (y = Height; y > 0; --y)
{
*out++ = ImageHelpers::RGBToPalette(alphatex, in[0], in[1], in[2], in[3]);
in += pitch;
}
in -= backstep;
}
break;
}
delete[] tempix;
}
}
return Pixels;
}
//===========================================================================
//
// FPNGTexture::CopyPixels
//
//===========================================================================
int FPNGTexture::CopyPixels(FBitmap *bmp, int conversion)
{
// 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;
lfr = fileSystem.OpenFileReader(SourceLump);
lump = &lfr;
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(0, 0, Pixels, Width, Height, 1, Width, 0, pe);
break;
case 2:
if (!HaveTrans)
{
bmp->CopyPixelDataRGB(0, 0, Pixels, Width, Height, 3, pixwidth, 0, CF_RGB);
}
else
{
bmp->CopyPixelDataRGB(0, 0, Pixels, Width, Height, 3, pixwidth, 0, CF_RGBT, nullptr,
NonPaletteTrans[0], NonPaletteTrans[1], NonPaletteTrans[2]);
transpal = true;
}
break;
case 4:
bmp->CopyPixelDataRGB(0, 0, Pixels, Width, Height, 2, pixwidth, 0, CF_IA);
transpal = -1;
break;
case 6:
bmp->CopyPixelDataRGB(0, 0, Pixels, Width, Height, 4, pixwidth, 0, CF_RGBA);
transpal = -1;
break;
default:
break;
}
delete[] Pixels;
return transpal;
}
#include "textures.h"
//==========================================================================
//
// A savegame picture
// This is essentially a stripped down version of the PNG texture
// only supporting the features actually present in a savegame
// that does not use an image source, because image sources are not
// meant to be transient data like the savegame picture.
//
//==========================================================================
class FPNGFileTexture : public FTexture
{
public:
FPNGFileTexture (FileReader &lump, int width, int height, uint8_t colortype);
virtual FBitmap GetBgraBitmap(const PalEntry *remap, int *trans) override;
protected:
FileReader fr;
uint8_t ColorType;
int PaletteSize;
};
//==========================================================================
//
//
//
//==========================================================================
FGameTexture *PNGTexture_CreateFromFile(PNGHandle *png, const FString &filename)
{
if (M_FindPNGChunk(png, MAKE_ID('I','H','D','R')) == 0)
{
return nullptr;
}
// Savegame images can only be either 8 bit paletted or 24 bit RGB
auto &data = png->File;
int width = data.ReadInt32BE();
int height = data.ReadInt32BE();
uint8_t bitdepth = data.ReadUInt8();
uint8_t colortype = data.ReadUInt8();
uint8_t compression = data.ReadUInt8();
uint8_t filter = data.ReadUInt8();
uint8_t interlace = data.ReadUInt8();
// Reject anything that cannot be put into a savegame picture by GZDoom itself.
if (compression != 0 || filter != 0 || interlace > 0 || bitdepth != 8 || (colortype != 2 && colortype != 3)) return nullptr;
else return MakeGameTexture(new FPNGFileTexture (png->File, width, height, colortype), nullptr, ETextureType::Override);
}
//==========================================================================
//
//
//
//==========================================================================
FPNGFileTexture::FPNGFileTexture (FileReader &lump, int width, int height, uint8_t colortype)
: ColorType(colortype)
{
Width = width;
Height = height;
Masked = false;
bTranslucent = false;
fr = std::move(lump);
}
//===========================================================================
//
// FPNGTexture::CopyPixels
//
//===========================================================================
FBitmap FPNGFileTexture::GetBgraBitmap(const PalEntry *remap, int *trans)
{
FBitmap bmp;
// Parse pre-IDAT chunks. I skip the CRCs. Is that bad?
PalEntry pe[256];
uint32_t len, id;
int pixwidth = Width * (ColorType == 2? 3:1);
FileReader *lump = &fr;
bmp.Create(Width, Height);
lump->Seek(33, FileReader::SeekSet);
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);
if (id != MAKE_ID('P','L','T','E'))
lump->Seek (len, FileReader::SeekCur);
else
{
PaletteSize = std::min<int> (len / 3, 256);
for(int i = 0; i < PaletteSize; i++)
{
pe[i].r = lump->ReadUInt8();
pe[i].g = lump->ReadUInt8();
pe[i].b = lump->ReadUInt8();
pe[i].a = 255;
}
}
lump->Seek(4, FileReader::SeekCur); // Skip CRC
lump->Read(&len, 4);
id = MAKE_ID('I','E','N','D');
lump->Read(&id, 4);
}
auto StartOfIDAT = (uint32_t)lump->Tell() - 8;
TArray<uint8_t> Pixels(pixwidth * Height);
lump->Seek (StartOfIDAT, FileReader::SeekSet);
lump->Read(&len, 4);
lump->Read(&id, 4);
M_ReadIDAT (*lump, Pixels.Data(), Width, Height, pixwidth, 8, ColorType, 0, BigLong((unsigned int)len));
if (ColorType == 3)
{
bmp.CopyPixelData(0, 0, Pixels.Data(), Width, Height, 1, Width, 0, pe);
}
else
{
bmp.CopyPixelDataRGB(0, 0, Pixels.Data(), Width, Height, 3, pixwidth, 0, CF_RGB);
}
return bmp;
}
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