mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-14 21:59:17 +00:00
4b83dd78d6
- The refactoring code for MacFont that magnifies the font on a surface and then uses a grayscalemap to refactor the scaling, is pushed back into a resuable method in the base font class. - surface magnigy funtion transfer and scaleSingleGlyph method add to the font class.
567 lines
18 KiB
C++
567 lines
18 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "graphics/font.h"
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#include "graphics/managed_surface.h"
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#include "common/array.h"
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#include "common/util.h"
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namespace Graphics {
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int Font::getFontAscent() const {
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return -1;
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}
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int Font::getFontDescent() const {
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return -1;
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}
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int Font::getFontLeading() const {
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return -1;
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}
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int Font::getKerningOffset(uint32 left, uint32 right) const {
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return 0;
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}
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Common::Rect Font::getBoundingBox(uint32 chr) const {
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return Common::Rect(getCharWidth(chr), getFontHeight());
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}
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namespace {
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template<class StringType>
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Common::Rect getBoundingBoxImpl(const Font &font, const StringType &str, int x, int y, int w, TextAlign align, int deltax) {
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// We follow the logic of drawStringImpl here. The only exception is
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// that we do allow an empty width to be specified here. This allows us
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// to obtain the complete bounding box of a string.
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const int leftX = x, rightX = w ? (x + w + 1) : 0x7FFFFFFF;
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int width = font.getStringWidth(str);
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if (align == kTextAlignCenter)
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x = x + (w - width)/2;
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else if (align == kTextAlignRight)
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x = x + w - width;
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x += deltax;
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bool first = true;
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Common::Rect bbox;
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typename StringType::unsigned_type last = 0;
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for (typename StringType::const_iterator i = str.begin(), end = str.end(); i != end; ++i) {
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const typename StringType::unsigned_type cur = *i;
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x += font.getKerningOffset(last, cur);
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last = cur;
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Common::Rect charBox = font.getBoundingBox(cur);
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if (x + charBox.right > rightX)
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break;
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if (x + charBox.right >= leftX) {
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charBox.translate(x, y);
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if (first) {
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bbox = charBox;
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first = false;
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} else {
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bbox.extend(charBox);
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}
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}
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x += font.getCharWidth(cur);
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}
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return bbox;
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}
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template<class StringType>
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int getStringWidthImpl(const Font &font, const StringType &str) {
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int space = 0;
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typename StringType::unsigned_type last = 0;
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for (uint i = 0; i < str.size(); ++i) {
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const typename StringType::unsigned_type cur = str[i];
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space += font.getCharWidth(cur) + font.getKerningOffset(last, cur);
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last = cur;
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}
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return space;
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}
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template<class SurfaceType, class StringType>
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void drawStringImpl(const Font &font, SurfaceType *dst, const StringType &str, int x, int y, int w, uint32 color, TextAlign align, int deltax) {
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// The logic in getBoundingImpl is the same as we use here. In case we
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// ever change something here we will need to change it there too.
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assert(dst != 0);
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const int leftX = x, rightX = x + w + 1;
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int width = font.getStringWidth(str);
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if (align == kTextAlignCenter)
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x = x + (w - width)/2;
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else if (align == kTextAlignRight)
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x = x + w - width;
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x += deltax;
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typename StringType::unsigned_type last = 0;
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for (typename StringType::const_iterator i = str.begin(), end = str.end(); i != end; ++i) {
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const typename StringType::unsigned_type cur = *i;
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x += font.getKerningOffset(last, cur);
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last = cur;
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Common::Rect charBox = font.getBoundingBox(cur);
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if (x + charBox.right > rightX)
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break;
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if (x + charBox.right >= leftX)
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font.drawChar(dst, cur, x, y, color);
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x += font.getCharWidth(cur);
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}
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}
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template<class StringType>
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struct WordWrapper {
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Common::Array<StringType> &lines;
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int actualMaxLineWidth;
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WordWrapper(Common::Array<StringType> &l) : lines(l), actualMaxLineWidth(0) {
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}
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void add(StringType &line, int &w) {
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if (actualMaxLineWidth < w)
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actualMaxLineWidth = w;
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lines.push_back(line);
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line.clear();
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w = 0;
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}
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void clear() {
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lines.clear();
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actualMaxLineWidth = 0;
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}
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};
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template<class StringType>
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int wordWrapTextImpl(const Font &font, const StringType &str, int maxWidth, Common::Array<StringType> &lines, int initWidth, uint32 mode) {
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WordWrapper<StringType> wrapper(lines);
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StringType line;
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StringType tmpStr;
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int lineWidth = initWidth;
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int tmpWidth = 0;
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int fullTextWidthEWL = initWidth; // this replaces new line characters (if any) with single spaces - it is used in Even Width Lines mode
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// The rough idea behind this algorithm is as follows:
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// We accumulate characters into the string tmpStr. Whenever a full word
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// has been gathered together this way, we 'commit' it to the line buffer
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// 'line', i.e. we add tmpStr to the end of line, then clear it. Before
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// we do that, we check whether it would cause 'line' to exceed maxWidth;
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// in that case, we first add line to lines, then reset it.
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//
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// If a newline character is read, then we also add line to lines and clear it.
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//
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// Special care has to be taken to account for 'words' that exceed the width
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// of a line. If we encounter such a word, we have to wrap it over multiple
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// lines.
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typename StringType::unsigned_type last = 0;
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// When EvenWidthLines mode is enabled then we require an early loop over the entire string
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// in order to get the full width of the text
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//
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// If both "Wrap On Explicit New Lines" and "Even Width Lines" modes are set,
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// and there are new line characters in the text,
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// then "Wrap On Explicit New Lines" takes precedence and "Even Width Lines" is ignored for that text.
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// However, if both are set, but there are no new lines in the text,
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// then the "Even Width Lines" auto-wrapping is applied.
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//
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if (mode & kWordWrapEvenWidthLines) {
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// Early loop to get the full width of the text
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for (typename StringType::const_iterator x = str.begin(); x != str.end(); ++x) {
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typename StringType::unsigned_type c = *x;
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// Check for Windows and Mac line breaks
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if (c == '\r') {
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if (x != str.end() && *(x + 1) == '\n') {
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++x;
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}
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c = '\n';
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}
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if (c == '\n') {
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if (!(mode & kWordWrapOnExplicitNewLines)) {
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c = ' ';
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} else {
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mode &= ~kWordWrapEvenWidthLines;
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break;
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}
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}
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const int w = font.getCharWidth(c) + font.getKerningOffset(last, c);
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last = c;
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fullTextWidthEWL += w;
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}
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}
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int targetTotalLinesNumberEWL = 0;
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int targetMaxLineWidth = 0;
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do {
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if (mode & kWordWrapEvenWidthLines) {
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wrapper.clear();
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targetTotalLinesNumberEWL += 1;
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// We add +2 to the fullTextWidthEWL to account for possible shadow pixels
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// We add +10 * font.getCharWidth(' ') to the quotient since we want to allow some extra margin (about an extra wprd's length)
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// since that yields better looking results
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targetMaxLineWidth = ((fullTextWidthEWL + 2) / targetTotalLinesNumberEWL) + 10 * font.getCharWidth(' ');
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if (targetMaxLineWidth > maxWidth) {
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// repeat the loop with increased targetTotalLinesNumberEWL
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continue;
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}
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} else {
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targetMaxLineWidth = maxWidth;
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}
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last = 0;
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tmpWidth = 0;
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for (typename StringType::const_iterator x = str.begin(); x != str.end(); ++x) {
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typename StringType::unsigned_type c = *x;
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// Convert Windows and Mac line breaks into plain \n
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if (c == '\r') {
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if (x != str.end() && *(x + 1) == '\n') {
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++x;
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}
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c = '\n';
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}
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// if wrapping on explicit new lines is disabled, then new line characters should be treated as a single white space char
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if (!(mode & kWordWrapOnExplicitNewLines) && c == '\n') {
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c = ' ';
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}
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const int currentCharWidth = font.getCharWidth(c);
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const int w = currentCharWidth + font.getKerningOffset(last, c);
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last = c;
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const bool wouldExceedWidth = (lineWidth + tmpWidth + w > targetMaxLineWidth);
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// If this char is a whitespace, then it represents a potential
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// 'wrap point' where wrapping could take place. Everything that
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// came before it can now safely be added to the line, as we know
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// that it will not have to be wrapped.
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if (Common::isSpace(c)) {
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line += tmpStr;
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lineWidth += tmpWidth;
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tmpStr.clear();
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tmpWidth = 0;
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// If we encounter a line break (\n), or if the new space would
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// cause the line to overflow: start a new line
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if (((mode & kWordWrapOnExplicitNewLines) && c == '\n') || wouldExceedWidth) {
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wrapper.add(line, lineWidth);
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continue;
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}
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}
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// If the max line width would be exceeded by adding this char,
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// insert a line break.
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if (wouldExceedWidth) {
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// Commit what we have so far, *if* we have anything.
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// If line is empty, then we are looking at a word
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// which exceeds the maximum line width.
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if (lineWidth > 0) {
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wrapper.add(line, lineWidth);
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// Trim left side
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while (tmpStr.size() && Common::isSpace(tmpStr[0])) {
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tmpStr.deleteChar(0);
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// This is not very fast, but it is the simplest way to
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// assure we do not mess something up because of kerning.
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tmpWidth = font.getStringWidth(tmpStr);
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}
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if (tmpStr.empty()) {
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// If tmpStr is empty, we might have removed the space before 'c'.
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// That means we have to recompute the kerning.
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tmpWidth += currentCharWidth + font.getKerningOffset(0, c);
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tmpStr += c;
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continue;
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}
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} else {
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wrapper.add(tmpStr, tmpWidth);
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}
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}
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tmpWidth += w;
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tmpStr += c;
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}
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// If some text is left over, add it as the final line
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line += tmpStr;
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lineWidth += tmpWidth;
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if (lineWidth > 0) {
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wrapper.add(line, lineWidth);
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}
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} while ((mode & kWordWrapEvenWidthLines)
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&& (targetMaxLineWidth > maxWidth));
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return wrapper.actualMaxLineWidth;
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}
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template<typename StringType>
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StringType handleEllipsis(const Font &font, const StringType &input, int w) {
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StringType s = input;
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int width = font.getStringWidth(s);
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bool hasEllipsisAtEnd = false;
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if (s.size() > 3 && s[s.size() - 1] == '.' && s[s.size() - 2] == '.' && s[s.size() - 3] == '.') {
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hasEllipsisAtEnd = true;
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}
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if (width > w && hasEllipsisAtEnd) {
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// String is too wide. Check whether it ends in an ellipsis
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// ("..."). If so, remove that and try again!
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s.deleteLastChar();
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s.deleteLastChar();
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s.deleteLastChar();
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width = font.getStringWidth(s);
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}
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if (width > w) {
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StringType str;
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StringType ellipsis("...");
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// String is too wide. So we shorten it "intelligently" by
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// replacing parts of the string by an ellipsis. There are
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// three possibilities for this: replace the start, the end, or
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// the middle of the string. What is best really depends on the
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// context; but unless we want to make this configurable,
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// replacing the middle seems to be a good compromise.
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const int ellipsisWidth = font.getStringWidth(ellipsis);
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// SLOW algorithm to remove enough of the middle. But it is good enough
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// for now.
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const int halfWidth = (w - ellipsisWidth) / 2;
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int w2 = 0;
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typename StringType::unsigned_type last = 0;
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uint i = 0;
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for (; i < s.size(); ++i) {
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const typename StringType::unsigned_type cur = s[i];
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int charWidth = font.getCharWidth(cur) + font.getKerningOffset(last, cur);
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if (w2 + charWidth > halfWidth)
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break;
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last = cur;
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w2 += charWidth;
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str += cur;
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}
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// At this point we know that the first 'i' chars are together 'w2'
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// pixels wide. We took the first i-1, and add "..." to them.
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str += ellipsis;
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last = '.';
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// The original string is width wide. Of those we already skipped past
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// w2 pixels, which means (width - w2) remain.
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// The new str is (w2+ellipsisWidth) wide, so we can accommodate about
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// (w - (w2+ellipsisWidth)) more pixels.
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// Thus we skip ((width - w2) - (w - (w2+ellipsisWidth))) =
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// (width + ellipsisWidth - w)
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int skip = width + ellipsisWidth - w;
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for (; i < s.size() && skip > 0; ++i) {
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const typename StringType::unsigned_type cur = s[i];
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skip -= font.getCharWidth(cur) + font.getKerningOffset(last, cur);
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last = cur;
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}
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// Append the remaining chars, if any
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for (; i < s.size(); ++i) {
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str += s[i];
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}
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return str;
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}
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return s;
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}
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} // End of anonymous namespace
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Common::Rect Font::getBoundingBox(const Common::String &input, int x, int y, const int w, TextAlign align, int deltax, bool useEllipsis) const {
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// In case no width was given we cannot use ellipsis or any alignment
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// apart from left alignment.
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if (w == 0) {
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if (useEllipsis) {
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warning("Font::getBoundingBox: Requested ellipsis when no width was specified");
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}
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if (align != kTextAlignLeft) {
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warning("Font::getBoundingBox: Requested text alignment when no width was specified");
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}
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useEllipsis = false;
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align = kTextAlignLeft;
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}
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const Common::String str = useEllipsis ? handleEllipsis(*this, input, w) : input;
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return getBoundingBoxImpl(*this, str, x, y, w, align, deltax);
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}
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Common::Rect Font::getBoundingBox(const Common::U32String &input, int x, int y, const int w, TextAlign align, int deltax, bool useEllipsis) const {
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// In case no width was given we cannot any alignment apart from left
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// alignment.
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if (w == 0) {
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if (useEllipsis) {
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warning("Font::getBoundingBox: Requested ellipsis when no width was specified");
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}
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if (align != kTextAlignLeft) {
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warning("Font::getBoundingBox: Requested text alignment when no width was specified");
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}
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useEllipsis = false;
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align = kTextAlignLeft;
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}
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const Common::U32String str = useEllipsis ? handleEllipsis(*this, input, w) : input;
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return getBoundingBoxImpl(*this, str, x, y, w, align, 0);
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}
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int Font::getStringWidth(const Common::String &str) const {
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return getStringWidthImpl(*this, str);
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}
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int Font::getStringWidth(const Common::U32String &str) const {
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return getStringWidthImpl(*this, str);
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}
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void Font::drawChar(ManagedSurface *dst, uint32 chr, int x, int y, uint32 color) const {
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drawChar(dst->surfacePtr(), chr, x, y, color);
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Common::Rect charBox = getBoundingBox(chr);
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charBox.translate(x, y);
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dst->addDirtyRect(charBox);
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}
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void Font::drawString(Surface *dst, const Common::String &str, int x, int y, int w, uint32 color, TextAlign align, int deltax, bool useEllipsis) const {
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Common::String renderStr = useEllipsis ? handleEllipsis(*this, str, w) : str;
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drawStringImpl(*this, dst, renderStr, x, y, w, color, align, deltax);
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}
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void Font::drawString(Surface *dst, const Common::U32String &str, int x, int y, int w, uint32 color, TextAlign align, int deltax, bool useEllipsis) const {
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Common::U32String renderStr = useEllipsis ? handleEllipsis(*this, str, w) : str;
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drawStringImpl(*this, dst, renderStr, x, y, w, color, align, deltax);
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}
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void Font::drawString(ManagedSurface *dst, const Common::String &str, int x, int y, int w, uint32 color, TextAlign align, int deltax, bool useEllipsis) const {
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Common::String renderStr = useEllipsis ? handleEllipsis(*this, str, w) : str;
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drawStringImpl(*this, dst, renderStr, x, y, w, color, align, deltax);
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if (w != 0) {
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dst->addDirtyRect(getBoundingBox(str, x, y, w, align, deltax, useEllipsis));
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}
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}
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void Font::drawString(ManagedSurface *dst, const Common::U32String &str, int x, int y, int w, uint32 color, TextAlign align, int deltax, bool useEllipsis) const {
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Common::U32String renderStr = useEllipsis ? handleEllipsis(*this, str, w) : str;
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drawStringImpl(*this, dst, renderStr, x, y, w, color, align, deltax);
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if (w != 0) {
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dst->addDirtyRect(getBoundingBox(str, x, y, w, align, useEllipsis));
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}
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}
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|
|
|
int Font::wordWrapText(const Common::String &str, int maxWidth, Common::Array<Common::String> &lines, int initWidth, uint32 mode) const {
|
|
return wordWrapTextImpl(*this, str, maxWidth, lines, initWidth, mode);
|
|
}
|
|
|
|
int Font::wordWrapText(const Common::U32String &str, int maxWidth, Common::Array<Common::U32String> &lines, int initWidth, uint32 mode) const {
|
|
return wordWrapTextImpl(*this, str, maxWidth, lines, initWidth, mode);
|
|
}
|
|
|
|
TextAlign convertTextAlignH(TextAlign alignH, bool rtl) {
|
|
switch (alignH) {
|
|
case kTextAlignStart:
|
|
return rtl ? kTextAlignRight : kTextAlignLeft;
|
|
case kTextAlignEnd:
|
|
return rtl ? kTextAlignLeft : kTextAlignRight;
|
|
default:
|
|
return alignH;
|
|
}
|
|
}
|
|
|
|
#define wholedivide(x, y) (((x)+((y)-1))/(y))
|
|
|
|
static void countupScore(int *dstGray, int x, int y, int bbw, int bbh, float scale) {
|
|
int newbbw = bbw * scale;
|
|
int newbbh = bbh * scale;
|
|
int x_ = x * newbbw;
|
|
int y_ = y * newbbh;
|
|
int x1 = x_ + newbbw;
|
|
int y1 = y_ + newbbh;
|
|
|
|
int newxbegin = x_ / bbw;
|
|
int newybegin = y_ / bbh;
|
|
int newxend = wholedivide(x1, bbw);
|
|
int newyend = wholedivide(y1, bbh);
|
|
|
|
for (int newy = newybegin; newy < newyend; newy++) {
|
|
for (int newx = newxbegin; newx < newxend; newx++) {
|
|
int newX = newx * bbw;
|
|
int newY = newy * bbh;
|
|
int newX1 = newX + bbw;
|
|
int newY1 = newY + bbh;
|
|
dstGray[newy * newbbw + newx] += (MIN(x1, newX1) - MAX(x_, newX)) *
|
|
(MIN(y1, newY1) - MAX(y_, newY));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void magnifyGray(Surface *src, int *dstGray, int width, int height, float scale) {
|
|
for (uint16 y = 0; y < height; y++) {
|
|
for (uint16 x = 0; x < width; x++) {
|
|
if (*((byte *)src->getBasePtr(x, y)) == 1)
|
|
countupScore(dstGray, x, y, width, height, scale);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Font::scaleSingleGlyph(Surface *scaleSurface, int *grayScaleMap, int grayScaleMapSize, int width, int height, int xOffset, int yOffset, int grayLevel, int chr, int srcheight, int srcwidth, float scale) const {
|
|
|
|
scaleSurface->fillRect(Common::Rect(scaleSurface->w, scaleSurface->h), 0);
|
|
drawChar(scaleSurface, chr, xOffset, yOffset, 1);
|
|
memset(grayScaleMap, 0, grayScaleMapSize * sizeof(int));
|
|
magnifyGray(scaleSurface, grayScaleMap, srcwidth, srcheight, scale);
|
|
int *grayPtr = grayScaleMap;
|
|
for (int y = 0; y < height; y++) {
|
|
byte *dst = (byte *)scaleSurface->getBasePtr(0, y);
|
|
for (int x = 0; x < width; x++, grayPtr++, dst++) {
|
|
if (*grayPtr > grayLevel)
|
|
*dst = 1;
|
|
else
|
|
*dst = 0;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
} // End of namespace Graphics
|