mirror of
https://github.com/libretro/scummvm.git
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89 lines
3.1 KiB
C++
89 lines
3.1 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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*
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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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*
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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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*/
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#include "glk/frotz/bitmap_font.h"
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namespace Glk {
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namespace Frotz {
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BitmapFont::BitmapFont(const Graphics::Surface &src, const Common::Point &size,
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uint srcWidth, uint srcHeight, unsigned char startingChar, bool isFixedWidth) :
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_startingChar(startingChar), _size(size) {
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assert(src.format.bytesPerPixel == 1);
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assert((src.w % srcWidth) == 0);
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assert((src.h % srcHeight) == 0);
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// Set up a characters array
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_chars.resize((src.w / srcWidth) * (src.h / srcHeight));
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// Iterate through loading characters
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Common::Rect r(srcWidth, srcHeight);
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int charsPerRow = src.w / srcWidth;
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for (uint idx = 0; idx < _chars.size(); ++idx) {
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r.moveTo((idx % charsPerRow) * srcWidth, (idx / charsPerRow) * srcHeight);
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int srcCharWidth = isFixedWidth ? r.width() : getSourceCharacterWidth(idx, src, r);
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int destCharWidth = (size.x * srcCharWidth + (srcWidth - 1)) / srcWidth;
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Common::Rect charBounds(r.left, r.top, r.left + srcCharWidth, r.bottom);
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_chars[idx].create(destCharWidth, size.y, src.format);
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_chars[idx].transBlitFrom(src, charBounds, Common::Rect(0, 0, _chars[idx].w, _chars[idx].h));
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}
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}
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void BitmapFont::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
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const Graphics::ManagedSurface &c = _chars[chr - _startingChar];
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for (int yCtr = 0; yCtr < c.h; ++yCtr) {
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const byte *srcP = (const byte *)c.getBasePtr(0, yCtr);
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for (int xCtr = 0; xCtr < c.w; ++xCtr, ++srcP) {
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if (!*srcP)
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dst->hLine(x + xCtr, y + yCtr, x + xCtr, color);
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}
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}
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}
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int BitmapFont::getSourceCharacterWidth(uint charIndex, const Graphics::Surface &src,
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const Common::Rect &charBounds) {
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if (charIndex == 0)
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// The space character is treated as half the width of bounding area
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return charBounds.width() / 2;
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// Scan through the rows to find the right most pixel, getting the width from that
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int maxWidth = 0, rowX;
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for (int y = charBounds.top; y < charBounds.bottom; ++y) {
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rowX = 0;
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const byte *srcP = (const byte *)src.getBasePtr(charBounds.left, y);
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for (int x = 0; x < charBounds.width(); ++x, ++srcP) {
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if (!*srcP)
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rowX = x;
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}
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maxWidth = MAX(maxWidth, MIN(rowX + 2, (int)charBounds.width()));
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}
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return maxWidth;
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}
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} // End of namespace Frotz
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} // End of namespace Glk
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