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https://github.com/libretro/scummvm.git
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135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "groovie/font.h"
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namespace Groovie {
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T7GFont::T7GFont() : _maxHeight(0), _maxWidth(0), _glyphs(0) {
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}
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T7GFont::~T7GFont() {
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delete[] _glyphs;
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}
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bool T7GFont::load(Common::SeekableReadStream &stream) {
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// Read the mapping of characters to glyphs
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if (stream.read(_mapChar2Glyph, 128) < 128) {
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error("Groovie::T7GFont: Couldn't read the character to glyph map");
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return false;
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}
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// Calculate the number of glyphs
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byte numGlyphs = 0;
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for (int i = 0; i < 128; i++)
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if (_mapChar2Glyph[i] >= numGlyphs)
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numGlyphs = _mapChar2Glyph[i] + 1;
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// Read the glyph offsets
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uint16 *glyphOffsets = new uint16[numGlyphs];
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for (int i = 0; i < numGlyphs; i++)
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glyphOffsets[i] = stream.readUint16LE();
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if (stream.eos()) {
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error("Groovie::T7GFont: Couldn't read the glyph offsets");
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delete[] glyphOffsets;
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return false;
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}
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// Allocate the glyph data
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delete[] _glyphs;
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_glyphs = new Glyph[numGlyphs];
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// Ensure we're ready to read the first glyph. (Most versions don't
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// need it, but the russian one does. This fixes bug #3095031.)
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stream.seek(glyphOffsets[0]);
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// Read the glyphs
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_maxHeight = _maxWidth = 0;
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for (int i = 0; (i < numGlyphs) && !stream.eos(); i++) {
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// Verify we're at the expected stream position
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if (stream.pos() != glyphOffsets[i]) {
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uint16 offset = glyphOffsets[i];
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delete[] glyphOffsets;
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error("Groovie::T7GFont: Glyph %d starts at %d but the current "
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"offset is %d", i, offset, stream.pos());
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return false;
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}
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// Read the glyph information
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Glyph *g = &_glyphs[i];
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g->width = stream.readByte();
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g->julia = stream.readByte();
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// Read the pixels data into a dynamic array (we don't know its length)
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Common::Array<byte> data;
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data.reserve(300);
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byte b = stream.readByte();
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while (!stream.eos() && (b != 0xFF)) {
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data.push_back(b);
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b = stream.readByte();
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}
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// Verify the pixel data size
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assert (data.size() % g->width == 0);
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g->height = data.size() / g->width;
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// Copy the pixel data into the definitive static array
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g->pixels = new byte[data.size()];
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memcpy(g->pixels, data.begin(), data.size());
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// Update the max values
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if (g->width > _maxWidth)
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_maxWidth = g->width;
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if (g->height > _maxHeight)
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_maxHeight = g->height;
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}
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delete[] glyphOffsets;
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return true;
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}
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void T7GFont::drawChar(Graphics::Surface *dst, byte chr, int x, int y, uint32 color) const {
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// We ignore the color, as the font is already colored
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const Glyph *glyph = getGlyph(chr);
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const byte *src = glyph->pixels;
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byte *target = (byte *)dst->getBasePtr(x, y);
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for (int i = 0; i < glyph->height; i++) {
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memcpy(target, src, glyph->width);
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src += glyph->width;
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target += dst->pitch;
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}
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}
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const T7GFont::Glyph *T7GFont::getGlyph(byte chr) const {
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assert (chr < 128);
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byte numGlyph = _mapChar2Glyph[chr];
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return &_glyphs[numGlyph];
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}
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} // End of Groovie namespace
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