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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/stream.h"
#include "common/textconsole.h"
#include "graphics/surface.h"
#include "graphics/fonts/macfont.h"
namespace Graphics {
enum {
k_fontTypeImageHeightTable = (1 << 0),
k_fontTypeGlyphWidthTable = (1 << 1),
k_fontTypeFontColorTable = (1 << 7),
k_fontTypeSyntheticFont = (1 << 8),
k_fontTypeFixedWidthFont = (1 << 13),
k_fontTypeNotExpandable = (1 << 14)
};
static int getDepth(uint16 _fontType) {
// Returns 1, 2, 4, 8
return 1 << ((_fontType >> 2) & 3);
}
MacFont::MacFont() {
_fontType = 0;
_firstChar = 0;
_lastChar = 0;
_maxWidth = 0;
_kernMax = 0;
_nDescent = 0;
_fRectWidth = 0;
_fRectHeight = 0;
_owTLoc = 0;
_ascent = 0;
_descent = 0;
_leading = 0;
_rowWords = 0;
_bitImage = nullptr;
}
MacFont::~MacFont() {
free(_bitImage);
}
bool MacFont::loadFOND(Common::SeekableReadStream &stream) {
_ffFlags = stream.readUint16BE(); // flags for family
_ffFamID = stream.readUint16BE(); // family ID number
_ffFirstChar = stream.readUint16BE(); // ASCII code of first character
_ffLastChar = stream.readUint16BE(); // ASCII code of last character
_ffAscent = stream.readUint16BE(); // maximum ascent for 1-pt font
_ffDescent = stream.readUint16BE(); // maximum descent for 1-pt font
_ffLeading = stream.readUint16BE(); // maximum leading for 1-pt font
_ffWidMax = stream.readUint16BE(); // maximum glyph width for 1-pt font
_ffWTabOff = stream.readUint32BE(); // offset to family glyph-width table
_ffKernOff = stream.readUint32BE(); // offset to kerning table
_ffStylOff = stream.readUint32BE(); // offset to style-mapping table
for (int i = 0; i < 9; i++) // style properties info
_ffProperty[i] = stream.readUint16BE();
_ffIntl[0] = stream.readUint16BE(); // for international use
_ffIntl[1] = stream.readUint16BE(); // for international use
_ffVersion = stream.readUint16BE(); // version number
return true;
}
bool MacFont::loadFont(Common::SeekableReadStream &stream) {
_fontType = stream.readUint16BE(); // font type
_firstChar = stream.readUint16BE(); // character code of first glyph
_lastChar = stream.readUint16BE(); // character code of last glyph
_maxWidth = stream.readUint16BE(); // maximum glyph width
_kernMax = stream.readSint16BE(); // maximum glyph kern
_nDescent = stream.readSint16BE(); // negative of descent
_fRectWidth = stream.readUint16BE(); // width of font rectangle
_fRectHeight = stream.readUint16BE(); // height of font rectangle
_owTLoc = stream.readUint16BE(); // offset to width/offset table
_ascent = stream.readUint16BE(); // maximum ascent measurement
_descent = stream.readUint16BE(); // maximum descent measurement
_leading = stream.readUint16BE(); // leading measurement
_rowWords = stream.readUint16BE() * 2;
if (getDepth(_fontType) != 1) {
warning("MacFont: %dbpp fonts are not supported", getDepth(_fontType));
return false;
}
// If positive, _nDescent holds the high bits of the offset to the
// width/offset table.
// https://developer.apple.com/legacy/library/documentation/mac/Text/Text-252.html
if (_nDescent > 0)
_owTLoc |= _nDescent << 16;
// Alignment is by word
_owTLoc *= 2;
_owTLoc += 16;
uint16 glyphCount = _lastChar - _firstChar + 1;
_glyphs.resize(glyphCount);
// Bit image table
uint16 bitImageSize = _rowWords * _fRectHeight;
_bitImage = new byte[bitImageSize];
stream.read(_bitImage, bitImageSize);
// Bitmap location table
// Last glyph is the pic for the missing glyph
// One more word for determinig width
uint16 *bitmapOffsets = (uint16 *)calloc(glyphCount + 2, sizeof(uint16));
for (uint16 i = 0; i < glyphCount + 2; i++)
bitmapOffsets[i] = stream.readUint16BE();
for (uint16 i = 0; i < glyphCount + 1; i++) {
Glyph *glyph = (i == glyphCount) ? &_defaultChar : &_glyphs[i];
glyph->bitmapOffset = bitmapOffsets[i];
glyph->bitmapWidth = bitmapOffsets[i + 1] - bitmapOffsets[i];
}
// Width/offset table
stream.seek(_owTLoc);
for (uint16 i = 0; i < glyphCount; i++) {
byte kerningOffset = stream.readByte();
byte width = stream.readByte();
// 0xFF designates missing glyph
if (kerningOffset == 0xFF && width == 0xFF)
continue;
_glyphs[i].kerningOffset = _kernMax + kerningOffset;
_glyphs[i].width = width;
}
_defaultChar.kerningOffset = _kernMax + stream.readByte();
_defaultChar.width = _kernMax + stream.readByte();
if (_fontType & k_fontTypeGlyphWidthTable) {
warning("Skipping glyph-width table");
for (uint16 i = 0; i < glyphCount; i++)
stream.readUint16BE();
}
if (_fontType & k_fontTypeImageHeightTable) {
warning("Skipping image height table");
for (uint16 i = 0; i < glyphCount; i++)
stream.readUint16BE();
}
return true;
}
int MacFont::getFontHeight() const {
return _fRectHeight;
}
int MacFont::getMaxCharWidth() const {
return _maxWidth;
}
int MacFont::getCharWidth(uint32 chr) const {
const Glyph *glyph = findGlyph(chr);
if (!glyph)
return _maxWidth;
return glyph->width;
}
void MacFont::drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const {
assert(dst != 0);
assert(dst->format.bytesPerPixel == 1 || dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4);
const Glyph *glyph = findGlyph(chr);
if (!glyph || glyph->width == 0)
return;
for (uint16 i = 0; i < _fRectHeight; i++) {
byte *srcRow = _bitImage + i * _rowWords;
for (uint16 j = 0; j < glyph->bitmapWidth; j++) {
uint16 bitmapOffset = glyph->bitmapOffset + j;
if (srcRow[bitmapOffset / 8] & (1 << (7 - (bitmapOffset % 8)))) {
if (dst->format.bytesPerPixel == 1)
*((byte *)dst->getBasePtr(x + j, y + i)) = color;
else if (dst->format.bytesPerPixel == 2)
*((uint16 *)dst->getBasePtr(x + j, y + i)) = color;
else if (dst->format.bytesPerPixel == 4)
*((uint32 *)dst->getBasePtr(x + j, y + i)) = color;
}
}
}
}
const MacFont::Glyph *MacFont::findGlyph(uint32 c) const {
if (_glyphs.empty())
return 0;
if (c < _firstChar || c > _lastChar)
return &_defaultChar;
return &_glyphs[c - _firstChar];
}
} // End of namespace Graphics
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