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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.
*
* $URL$
* $Id$
*
*/
#include "groovie/font.h"
namespace Groovie {
T7GFont::T7GFont() : _maxHeight(0), _maxWidth(0), _glyphs(0) {
}
T7GFont::~T7GFont() {
delete[] _glyphs;
}
bool T7GFont::load(Common::SeekableReadStream &stream) {
// Read the mapping of characters to glyphs
if (stream.read(_mapChar2Glyph, 128) < 128) {
error("Groovie::T7GFont: Couldn't read the character to glyph map");
return false;
}
// Calculate the number of glyphs
byte numGlyphs = 0;
for (int i = 0; i < 128; i++)
if (_mapChar2Glyph[i] >= numGlyphs)
numGlyphs = _mapChar2Glyph[i] + 1;
// Read the glyph offsets
uint16 *glyphOffsets = new uint16[numGlyphs];
for (int i = 0; i < numGlyphs; i++)
glyphOffsets[i] = stream.readUint16LE();
if (stream.eos()) {
error("Groovie::T7GFont: Couldn't read the glyph offsets");
delete[] glyphOffsets;
return false;
}
// Allocate the glyph data
delete[] _glyphs;
_glyphs = new Glyph[numGlyphs];
// Ensure we're ready to read the first glyph. (Most versions don't
// need it, but the russian one does. This fixes bug #3095031.)
stream.seek(glyphOffsets[0]);
// Read the glyphs
_maxHeight = _maxWidth = 0;
for (int i = 0; (i < numGlyphs) && !stream.eos(); i++) {
// Verify we're at the expected stream position
if (stream.pos() != glyphOffsets[i]) {
error("Groovie::T7GFont: Glyph %d starts at %d but the current "
"offset is %d", i, glyphOffsets[i], stream.pos());
return false;
}
// Read the glyph information
Glyph *g = &_glyphs[i];
g->width = stream.readByte();
g->julia = stream.readByte();
// Read the pixels data into a dynamic array (we don't know its length)
Common::Array<byte> data;
data.reserve(300);
byte b = stream.readByte();
while (!stream.eos() && (b != 0xFF)) {
data.push_back(b);
b = stream.readByte();
}
// Verify the pixel data size
assert (data.size() % g->width == 0);
g->height = data.size() / g->width;
// Copy the pixel data into the definitive static array
g->pixels = new byte[data.size()];
memcpy(g->pixels, data.begin(), data.size());
// Update the max values
if (g->width > _maxWidth)
_maxWidth = g->width;
if (g->height > _maxHeight)
_maxHeight = g->height;
}
delete[] glyphOffsets;
return true;
}
void T7GFont::drawChar(Graphics::Surface *dst, byte chr, int x, int y, uint32 color) const {
// We ignore the color, as the font is already colored
const Glyph *glyph = getGlyph(chr);
const byte *src = glyph->pixels;
byte *target = (byte *)dst->getBasePtr(x, y);
for (int i = 0; i < glyph->height; i++) {
memcpy(target, src, glyph->width);
src += glyph->width;
target += dst->pitch;
}
}
const T7GFont::Glyph *T7GFont::getGlyph(byte chr) const {
assert (chr < 128);
byte numGlyph = _mapChar2Glyph[chr];
return &_glyphs[numGlyph];
}
} // End of Groovie namespace
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