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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2004 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include "common/stdafx.h"
#include "graphics/font.h"
namespace Graphics {
int NewFont::getCharWidth(byte chr) const {
// If no width table is specified, return the maximum width
if (!desc.width)
return desc.maxwidth;
// If this character is not included in the font, use the default char.
if (chr < desc.firstchar || desc.firstchar + desc.size < chr) {
if (chr == ' ')
return desc.maxwidth / 2;
chr = desc.defaultchar;
}
return desc.width[chr - desc.firstchar];
}
void NewFont::drawChar(const Surface *dst, byte chr, int tx, int ty, uint32 color) const {
assert(dst != 0);
byte *ptr = (byte *)dst->getBasePtr(tx, ty);
assert(desc.bits != 0 && desc.maxwidth <= 16);
assert(dst->bytesPerPixel == 1 || dst->bytesPerPixel == 2);
// If this character is not included in the font, use the default char.
if (chr < desc.firstchar || chr >= desc.firstchar + desc.size) {
if (chr == ' ')
return;
chr = desc.defaultchar;
}
const int w = getCharWidth(chr);
chr -= desc.firstchar;
const bitmap_t *tmp = desc.bits + (desc.offset ? desc.offset[chr] : (chr * desc.height));
for (int y = 0; y < desc.height; y++, ptr += dst->pitch) {
const bitmap_t buffer = *tmp++;
bitmap_t mask = 0x8000;
if (ty + y < 0 || ty + y >= dst->h)
continue;
for (int x = 0; x < w; x++, mask >>= 1) {
if (tx + x < 0 || tx + x >= dst->w)
continue;
if ((buffer & mask) != 0) {
if (dst->bytesPerPixel == 1)
ptr[x] = color;
else if (dst->bytesPerPixel == 2)
((uint16 *)ptr)[x] = color;
}
}
}
}
#pragma mark -
int Font::getStringWidth(const Common::String &str) const {
int space = 0;
for (uint i = 0; i < str.size(); ++i)
space += getCharWidth(str[i]);
return space;
}
void Font::drawString(const Surface *dst, const Common::String &s, int x, int y, int w, uint32 color, TextAlignment align, int deltax, bool useEllipsis) const {
assert(dst != 0);
const int leftX = x, rightX = x + w;
uint i;
int width = getStringWidth(s);
Common::String str;
if (useEllipsis && width > w) {
// String is too wide. So we shorten it "intellegently", by replacing
// parts of it by an ellipsis ("..."). There are three possibilities
// for this: replace the start, the end, or the middle of the string.
// What is best really depends on the context; but unless we want to
// make this configurable, replacing the middle probably is a good
// compromise.
const int ellipsisWidth = getStringWidth("...");
// SLOW algorithm to remove enough of the middle. But it is good enough
// for now.
const int halfWidth = (w - ellipsisWidth) / 2;
int w2 = 0;
for (i = 0; i < s.size(); ++i) {
int charWidth = getCharWidth(s[i]);
if (w2 + charWidth > halfWidth)
break;
w2 += charWidth;
str += s[i];
}
// At this point we know that the first 'i' chars are together 'w2'
// pixels wide. We took the first i-1, and add "..." to them.
str += "...";
// The original string is width wide. Of those we already skipped past
// w2 pixels, which means (width - w2) remain.
// The new str is (w2+ellipsisWidth) wide, so we can accomodate about
// (w - (w2+ellipsisWidth)) more pixels.
// Thus we skip ((width - w2) - (w - (w2+ellipsisWidth))) =
// (width + ellipsisWidth - w)
int skip = width + ellipsisWidth - w;
for (; i < s.size() && skip > 0; ++i) {
skip -= getCharWidth(s[i]);
}
// Append the remaining chars, if any
for (; i < s.size(); ++i) {
str += s[i];
}
width = getStringWidth(str);
} else {
str = s;
}
if (align == kTextAlignCenter)
x = x + (w - width - 1)/2;
else if (align == kTextAlignRight)
x = x + w - width;
x += deltax;
for (i = 0; i < str.size(); ++i) {
w = getCharWidth(str[i]);
if (x+w > rightX)
break;
if (x >= leftX)
drawChar(dst, str[i], x, y, color);
x += w;
}
}
} // End of namespace Graphics
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