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8b1757eee2
Mainly this means that it's no longer necessary to reorder the palette to get working translated glyphs, so the FFontChar1 class and the TranslatedPic member and its invasive handling could all be cleaned out. All font operations now take place on true color data, with the sole execption of FSpecialFont's 'notranslate' handling.
576 lines
15 KiB
C++
576 lines
15 KiB
C++
/*
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** singlelumpfont.cpp
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** Management for compiled font lumps
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2016 Randy Heit
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** Copyright 2005-2019 Christoph Oelckers
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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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#include "engineerrors.h"
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#include "textures.h"
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#include "image.h"
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#include "v_font.h"
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#include "filesystem.h"
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#include "utf8.h"
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#include "fontchars.h"
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#include "texturemanager.h"
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#include "fontinternals.h"
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/* Special file formats handled here:
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FON1 "console" fonts have the following header:
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char Magic[4]; -- The characters "FON1"
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uword CharWidth; -- Character cell width
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uword CharHeight; -- Character cell height
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The FON1 header is followed by RLE character data for all 256
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8-bit ASCII characters.
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FON2 "standard" fonts have the following header:
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char Magic[4]; -- The characters "FON2"
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uword FontHeight; -- Every character in a font has the same height
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ubyte FirstChar; -- First character defined by this font.
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ubyte LastChar; -- Last character definde by this font.
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ubyte bConstantWidth;
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ubyte ShadingType;
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ubyte PaletteSize; -- size of palette in entries (not bytes!)
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ubyte Flags;
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There is presently only one flag for FON2:
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FOF_WHOLEFONTKERNING 1 -- The Kerning field is present in the file
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The FON2 header is followed by variable length data:
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word Kerning;
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-- only present if FOF_WHOLEFONTKERNING is set
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ubyte Palette[PaletteSize+1][3];
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-- The last entry is the delimiter color. The delimiter is not used
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-- by the font but is used by imagetool when converting the font
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-- back to an image. Color 0 is the transparent color and is also
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-- used only for converting the font back to an image. The other
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-- entries are all presorted in increasing order of brightness.
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ubyte CharacterData[...];
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-- RLE character data, in order
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*/
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class FSingleLumpFont : public FFont
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{
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public:
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FSingleLumpFont (const char *fontname, int lump);
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void RecordAllTextureColors(uint32_t* usedcolors) override;
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protected:
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void CheckFON1Chars ();
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void FixupPalette (uint8_t *identity, const PalEntry *palette, int* minlum ,int* maxlum);
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void LoadTranslations ();
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void LoadFON1 (int lump, const uint8_t *data);
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void LoadFON2 (int lump, const uint8_t *data);
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void LoadBMF (int lump, const uint8_t *data);
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enum
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{
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FONT1,
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FONT2,
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BMFFONT
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} FontType;
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PalEntry Palette[256];
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bool RescalePalette;
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};
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//==========================================================================
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//
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// FSingleLumpFont :: FSingleLumpFont
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//
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// Loads a FON1 or FON2 font resource.
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//
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//==========================================================================
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FSingleLumpFont::FSingleLumpFont (const char *name, int lump) : FFont(lump)
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{
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assert(lump >= 0);
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FontName = name;
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FileData data1 = fileSystem.ReadFile (lump);
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const uint8_t *data = (const uint8_t *)data1.GetMem();
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if (data[0] == 0xE1 && data[1] == 0xE6 && data[2] == 0xD5 && data[3] == 0x1A)
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{
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LoadBMF(lump, data);
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Type = BMF;
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}
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else if (data[0] != 'F' || data[1] != 'O' || data[2] != 'N' ||
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(data[3] != '1' && data[3] != '2'))
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{
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I_Error ("%s is not a recognizable font", name);
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}
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else
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{
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switch (data[3])
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{
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case '1':
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LoadFON1 (lump, data);
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Type = Fon1;
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break;
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case '2':
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LoadFON2 (lump, data);
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Type = Fon2;
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break;
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}
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}
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Next = FirstFont;
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FirstFont = this;
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}
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//==========================================================================
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//
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// FSingleLumpFont :: LoadTranslations
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//
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//==========================================================================
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void FSingleLumpFont::LoadTranslations()
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{
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uint8_t identity[256];
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unsigned int count = LastChar - FirstChar + 1;
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int minlum, maxlum;
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switch(FontType)
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{
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case FONT1:
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CheckFON1Chars();
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minlum = 1;
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maxlum = 255;
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break;
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case BMFFONT:
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case FONT2:
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FixupPalette (identity, Palette, &minlum, &maxlum);
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break;
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default:
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// Should be unreachable.
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I_Error("Unknown font type in FSingleLumpFont::LoadTranslation.");
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return;
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}
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for(unsigned int i = 0;i < count;++i)
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{
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if(Chars[i].OriginalPic)
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static_cast<FFontChar2*>(Chars[i].OriginalPic->GetTexture()->GetImage())->SetSourceRemap(Palette);
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}
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Translations.Resize(NumTextColors);
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for (int i = 0; i < NumTextColors; i++)
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{
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if (i == CR_UNTRANSLATED) Translations[i] = 0;
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else Translations[i] = LuminosityTranslation(i * 2 + (FontType == FONT1 ? 1 : 0), minlum, maxlum);
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}
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}
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//==========================================================================
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//
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// FSingleLumpFont :: LoadFON1
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//
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// FON1 is used for the console font.
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//
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//==========================================================================
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void FSingleLumpFont::LoadFON1 (int lump, const uint8_t *data)
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{
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int w, h;
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// The default console font is for Windows-1252 and fills the 0x80-0x9f range with valid glyphs.
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// Since now all internal text is processed as Unicode, these have to be remapped to their proper places.
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// The highest valid character in this range is 0x2122, so we need 0x2123 entries in our character table.
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Chars.Resize(0x2123);
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w = data[4] + data[5]*256;
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h = data[6] + data[7]*256;
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FontType = FONT1;
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FontHeight = h;
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SpaceWidth = w;
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FirstChar = 0;
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LastChar = 255; // This is to allow LoadTranslations to function. The way this is all set up really needs to be changed.
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GlobalKerning = 0;
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translateUntranslated = true;
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LastChar = 0x2122;
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// Move the Windows-1252 characters to their proper place.
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for (int i = 0x80; i < 0xa0; i++)
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{
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if (win1252map[i-0x80] != i && Chars[i].OriginalPic != nullptr && Chars[win1252map[i - 0x80]].OriginalPic == nullptr)
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{
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std::swap(Chars[i], Chars[win1252map[i - 0x80]]);
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}
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}
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Palette[0] = 0;
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for (int i = 1; i < 256; i++) Palette[i] = PalEntry(255, i, i, i);
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}
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//==========================================================================
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//
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// FSingleLumpFont :: LoadFON2
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//
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// FON2 is used for everything but the console font.
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//
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//==========================================================================
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void FSingleLumpFont::LoadFON2 (int lump, const uint8_t *data)
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{
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int count, i, totalwidth;
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uint16_t *widths;
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const uint8_t *palette;
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const uint8_t *data_p;
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FontType = FONT2;
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FontHeight = data[4] + data[5]*256;
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FirstChar = data[6];
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LastChar = data[7];
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ActiveColors = data[10]+1;
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RescalePalette = data[9] == 0;
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count = LastChar - FirstChar + 1;
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Chars.Resize(count);
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TArray<int> widths2(count, true);
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if (data[11] & 1)
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{ // Font specifies a kerning value.
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GlobalKerning = LittleShort(*(int16_t *)&data[12]);
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widths = (uint16_t *)(data + 14);
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}
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else
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{ // Font does not specify a kerning value.
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GlobalKerning = 0;
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widths = (uint16_t *)(data + 12);
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}
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totalwidth = 0;
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if (data[8])
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{ // Font is mono-spaced.
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totalwidth = LittleShort(widths[0]);
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for (i = 0; i < count; ++i)
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{
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widths2[i] = totalwidth;
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}
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totalwidth *= count;
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palette = (uint8_t *)&widths[1];
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}
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else
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{ // Font has varying character widths.
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for (i = 0; i < count; ++i)
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{
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widths2[i] = LittleShort(widths[i]);
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totalwidth += widths2[i];
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}
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palette = (uint8_t *)(widths + i);
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}
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if (FirstChar <= ' ' && LastChar >= ' ')
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{
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SpaceWidth = widths2[' '-FirstChar];
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}
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else if (FirstChar <= 'N' && LastChar >= 'N')
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{
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SpaceWidth = (widths2['N' - FirstChar] + 1) / 2;
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}
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else
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{
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SpaceWidth = totalwidth * 2 / (3 * count);
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}
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Palette[0] = 0;
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for (int i = 1; i < ActiveColors; i++)
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{
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Palette[i] = PalEntry(255, palette[i * 3], palette[i * 3 + 1], palette[i * 3 + 2]);
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}
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data_p = palette + ActiveColors*3;
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for (i = 0; i < count; ++i)
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{
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int destSize = widths2[i] * FontHeight;
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Chars[i].XMove = widths2[i];
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if (destSize <= 0)
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{
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Chars[i].OriginalPic = nullptr;
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}
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else
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{
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Chars[i].OriginalPic = MakeGameTexture(new FImageTexture(new FFontChar2 (lump, int(data_p - data), widths2[i], FontHeight)), nullptr, ETextureType::FontChar);
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TexMan.AddGameTexture(Chars[i].OriginalPic);
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do
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{
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int8_t code = *data_p++;
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if (code >= 0)
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{
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data_p += code+1;
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destSize -= code+1;
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}
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else if (code != -128)
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{
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data_p++;
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destSize -= (-code)+1;
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}
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} while (destSize > 0);
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}
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if (destSize < 0)
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{
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i += FirstChar;
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I_Error ("Overflow decompressing char %d (%c) of %s", i, i, FontName.GetChars());
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}
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}
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}
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//==========================================================================
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//
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// FSingleLumpFont :: LoadBMF
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//
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// Loads a BMF font. The file format is described at
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// <http://bmf.wz.cz/bmf-format.htm>
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//
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//==========================================================================
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void FSingleLumpFont::LoadBMF(int lump, const uint8_t *data)
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{
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const uint8_t *chardata;
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int numchars, count, totalwidth, nwidth;
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int infolen;
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int i, chari;
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FontType = BMFFONT;
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FontHeight = data[5];
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GlobalKerning = (int8_t)data[8];
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ActiveColors = data[16];
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SpaceWidth = -1;
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nwidth = -1;
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RescalePalette = true;
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infolen = data[17 + ActiveColors*3];
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chardata = data + 18 + ActiveColors*3 + infolen;
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numchars = chardata[0] + 256*chardata[1];
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chardata += 2;
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// Scan for lowest and highest characters defined and total font width.
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FirstChar = 256;
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LastChar = 0;
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totalwidth = 0;
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for (i = chari = 0; i < numchars; ++i, chari += 6 + chardata[chari+1] * chardata[chari+2])
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{
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if ((chardata[chari+1] == 0 || chardata[chari+2] == 0) && chardata[chari+5] == 0)
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{ // Don't count empty characters.
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continue;
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}
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if (chardata[chari] < FirstChar)
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{
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FirstChar = chardata[chari];
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}
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if (chardata[chari] > LastChar)
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{
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LastChar = chardata[chari];
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}
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totalwidth += chardata[chari+1];
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}
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if (LastChar < FirstChar)
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{
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I_Error("BMF font defines no characters");
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}
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count = LastChar - FirstChar + 1;
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Chars.Resize(count);
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// BMF palettes are only six bits per component. Fix that.
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for (i = 0; i < ActiveColors; ++i)
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{
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int r = (data[17 + i * 3] << 2) | (data[17 + i * 3] >> 4);
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int g = (data[18 + i * 3] << 2) | (data[18 + i * 3] >> 4);
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int b = (data[19 + i * 3] << 2) | (data[19 + i * 3] >> 4);
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Palette[i + 1] = PalEntry(255, r, g, b); // entry 0 (transparent) is not stored in the font file.
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}
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ActiveColors++;
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// Now scan through the characters again, creating glyphs for each one.
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for (i = chari = 0; i < numchars; ++i, chari += 6 + chardata[chari+1] * chardata[chari+2])
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{
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assert(chardata[chari] - FirstChar >= 0);
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assert(chardata[chari] - FirstChar < count);
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if (chardata[chari] == ' ')
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{
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SpaceWidth = chardata[chari+5];
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}
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else if (chardata[chari] == 'N')
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{
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nwidth = chardata[chari+5];
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}
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Chars[chardata[chari] - FirstChar].XMove = chardata[chari+5];
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if (chardata[chari+1] == 0 || chardata[chari+2] == 0)
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{ // Empty character: skip it.
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continue;
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}
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auto tex = MakeGameTexture(new FImageTexture(new FFontChar2(lump, int(chardata + chari + 6 - data),
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chardata[chari+1], // width
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chardata[chari+2], // height
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-(int8_t)chardata[chari+3], // x offset
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-(int8_t)chardata[chari+4] // y offset
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)), nullptr, ETextureType::FontChar);
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Chars[chardata[chari] - FirstChar].OriginalPic = tex;
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TexMan.AddGameTexture(tex);
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}
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// If the font did not define a space character, determine a suitable space width now.
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if (SpaceWidth < 0)
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{
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if (nwidth >= 0)
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{
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SpaceWidth = nwidth;
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}
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else
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{
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SpaceWidth = totalwidth * 2 / (3 * count);
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}
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}
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FixXMoves();
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}
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//==========================================================================
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//
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// FSingleLumpFont :: CheckFON1Chars
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//
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// Scans a FON1 resource for all the color values it uses and sets up
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// some tables like SimpleTranslation. Data points to the RLE data for
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// the characters. Also sets up the character textures.
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//
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//==========================================================================
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void FSingleLumpFont::CheckFON1Chars()
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{
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FileData memLump = fileSystem.ReadFile(Lump);
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const uint8_t* data = (const uint8_t*)memLump.GetMem();
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const uint8_t* data_p;
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data_p = data + 8;
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for (int i = 0; i < 256; ++i)
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{
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int destSize = SpaceWidth * FontHeight;
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if (!Chars[i].OriginalPic)
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{
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Chars[i].OriginalPic = MakeGameTexture(new FImageTexture(new FFontChar2(Lump, int(data_p - data), SpaceWidth, FontHeight)), nullptr, ETextureType::FontChar);
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Chars[i].XMove = SpaceWidth;
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TexMan.AddGameTexture(Chars[i].OriginalPic);
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}
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// Advance to next char's data and count the used colors.
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do
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{
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int8_t code = *data_p++;
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if (code >= 0)
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{
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destSize -= code + 1;
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while (code-- >= 0)
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{
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data_p++;
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}
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}
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else if (code != -128)
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{
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data_p++;
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destSize -= 1 - code;
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}
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} while (destSize > 0);
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}
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ActiveColors = 256;
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}
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//==========================================================================
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//
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// FSingleLumpFont :: FixupPalette
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//
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// Finds the best matches for the colors used by a FON2 font and finds thr
|
|
// used luminosity range
|
|
//
|
|
//==========================================================================
|
|
|
|
void FSingleLumpFont::FixupPalette (uint8_t *identity, const PalEntry *palette, int *pminlum, int *pmaxlum)
|
|
{
|
|
double maxlum = 0.0;
|
|
double minlum = 100000000.0;
|
|
|
|
identity[0] = 0;
|
|
palette += 3; // Skip the transparent color
|
|
|
|
for (int i = 1; i < ActiveColors; ++i, palette ++)
|
|
{
|
|
int r = palette->r;
|
|
int g = palette->g;
|
|
int b = palette->b;
|
|
double lum = r*0.299 + g*0.587 + b*0.114;
|
|
identity[i] = ColorMatcher.Pick(r, g, b);
|
|
if (lum > maxlum) maxlum = lum;
|
|
if (lum < minlum) minlum = lum;
|
|
}
|
|
|
|
if (pminlum) *pminlum = int(minlum);
|
|
if (pmaxlum) *pmaxlum = int(maxlum);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// RecordAllTextureColors
|
|
//
|
|
// Given a 256 entry buffer, sets every entry that corresponds to a color
|
|
// used by the font.
|
|
//
|
|
//==========================================================================
|
|
|
|
void FSingleLumpFont::RecordAllTextureColors(uint32_t* usedcolors)
|
|
{
|
|
uint8_t identity[256];
|
|
|
|
if (FontType == BMFFONT || FontType == FONT2)
|
|
{
|
|
FixupPalette(identity, Palette, nullptr, nullptr);
|
|
for (int i = 0; i < 256; i++)
|
|
{
|
|
if (identity[i] != 0) usedcolors[identity[i]]++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
FFont *CreateSingleLumpFont (const char *fontname, int lump)
|
|
{
|
|
return new FSingleLumpFont(fontname, lump);
|
|
}
|