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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 "glk/frotz/bitmap_font.h"
namespace Glk {
namespace Frotz {
BitmapFont::BitmapFont(const Graphics::Surface &src, const Common::Point &size,
uint srcWidth, uint srcHeight, unsigned char startingChar, bool isFixedWidth) :
_startingChar(startingChar), _size(size) {
assert(src.format.bytesPerPixel == 1);
assert((src.w % srcWidth) == 0);
assert((src.h % srcHeight) == 0);
// Set up a characters array
_chars.resize((src.w / srcWidth) * (src.h / srcHeight));
// Iterate through loading characters
Common::Rect r(srcWidth, srcHeight);
int charsPerRow = src.w / srcWidth;
for (uint idx = 0; idx < _chars.size(); ++idx) {
r.moveTo((idx % charsPerRow) * srcWidth, (idx / charsPerRow) * srcHeight);
int srcCharWidth = isFixedWidth ? r.width() : getSourceCharacterWidth(idx, src, r);
int destCharWidth = (size.x * srcCharWidth + (srcWidth - 1)) / srcWidth;
Common::Rect charBounds(r.left, r.top, r.left + srcCharWidth, r.bottom);
_chars[idx].create(destCharWidth, size.y, src.format);
_chars[idx].transBlitFrom(src, charBounds, Common::Rect(0, 0, _chars[idx].w, _chars[idx].h));
}
}
void BitmapFont::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
const Graphics::ManagedSurface &c = _chars[chr - _startingChar];
for (int yCtr = 0; yCtr < c.h; ++yCtr) {
const byte *srcP = (const byte *)c.getBasePtr(0, yCtr);
for (int xCtr = 0; xCtr < c.w; ++xCtr, ++srcP) {
if (!*srcP)
dst->hLine(x + xCtr, y + yCtr, x + xCtr, color);
}
}
}
int BitmapFont::getSourceCharacterWidth(uint charIndex, const Graphics::Surface &src,
const Common::Rect &charBounds) {
if (charIndex == 0)
// The space character is treated as half the width of bounding area
return charBounds.width() / 2;
// Scan through the rows to find the right most pixel, getting the width from that
int maxWidth = 0, rowX;
for (int y = charBounds.top; y < charBounds.bottom; ++y) {
rowX = 0;
const byte *srcP = (const byte *)src.getBasePtr(charBounds.left, y);
for (int x = 0; x < charBounds.width(); ++x, ++srcP) {
if (!*srcP)
rowX = x;
}
maxWidth = MAX(maxWidth, MIN(rowX + 2, (int)charBounds.width()));
}
return maxWidth;
}
} // End of namespace Frotz
} // End of namespace Glk
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