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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "bladerunner/font.h"
#include "bladerunner/bladerunner.h"
#include "common/debug.h"
namespace BladeRunner {
Font::Font() {
reset();
}
Font::~Font() {
close();
}
Font* Font::load(BladeRunnerEngine *vm, const Common::String &fileName, int spacing, bool useFontColor) {
Font *font = new Font();
font->_spacing = spacing;
font->_useFontColor = useFontColor;
Common::ScopedPtr<Common::SeekableReadStream> stream(vm->getResourceStream(fileName));
if (!stream) {
warning("Font::open failed to open '%s'", fileName.c_str());
delete font;
return nullptr;
}
font->_characterCount = stream->readUint32LE();
font->_maxWidth = stream->readUint32LE();
font->_maxHeight = stream->readUint32LE();
font->_dataSize = stream->readUint32LE();
font->_data = new uint16[font->_dataSize];
if (!font->_data) {
warning("Font::open failed to allocate font buffer");
delete font;
return nullptr;
}
font->_characters.resize(font->_characterCount);
for (uint32 i = 0; i < font->_characterCount; ++i) {
font->_characters[i].x = stream->readUint32LE();
font->_characters[i].y = stream->readUint32LE();
font->_characters[i].width = stream->readUint32LE();
font->_characters[i].height = stream->readUint32LE();
font->_characters[i].dataOffset = stream->readUint32LE();
}
for (int i = 0; i < font->_dataSize; ++i) {
font->_data[i] = stream->readUint16LE();
}
return font;
}
void Font::close() {
if (_data != nullptr) {
delete[] _data;
}
reset();
}
void Font::reset() {
_maxWidth = 0;
_maxHeight = 0;
_characterCount = 0;
_data = nullptr;
_dataSize = 0;
_screenWidth = 0;
_screenHeight = 0;
_spacing = 0;
_useFontColor = false;
_characters.clear();
}
int Font::getFontHeight() const {
return _maxHeight;
}
int Font::getMaxCharWidth() const {
return _maxWidth;
}
int Font::getCharWidth(uint32 chr) const {
if (chr >= _characterCount) {
return 0;
}
return _characters[chr + 1].width + _spacing;
}
void Font::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
uint32 characterIndex = chr + 1;
if (x < 0 || x >= dst->w || y < 0 || y >= dst->h || !_data || characterIndex >= _characterCount) {
return;
}
uint16 *srcPtr = &_data[_characters[characterIndex].dataOffset];
int width = _characters[characterIndex].width;
int height = _characters[characterIndex].height;
int endY = height + y - 1;
int currentY = y;
// FIXME/TODO
// This width and height check were added as a temporary bug fix -- a sanity check which is only needed for the internal TAHOMA18.FON font.
// That font's glyph properties table is corrupted - the start of the file states that there are 0xF7 (=247) entries in the char properties table
// but that table get corrupted past the 176th entry. The image data glyph part of the FON file also only covers the 176 entries.
// So the following if clause-check will return here if the width and height values are unnaturally big.
// The bug only affects debug cases where all character glyph need to be displayed...
// ...or potential custom dialogue / translations that reference characters that are not within the range of ASCII values for the normal Latin characters.
if (width > 100 || height > 100) {
return;
}
while (currentY <= endY && currentY < dst->h) {
int currentX = x;
int endX = width + x - 1;
while (currentX <= endX && currentX < dst->w) {
uint8 a, r, g, b;
getGameDataColor(*srcPtr, a, r, g, b);
if (!a) { // Alpha is inversed
uint32 outColor = color;
if (_useFontColor) {
// Ignore the alpha in the output as it is inversed in the input
outColor = dst->format.RGBToColor(r, g, b);
}
void *dstPtr = dst->getBasePtr(CLIP(currentX + _characters[characterIndex].x, 0, dst->w - 1), CLIP(currentY + _characters[characterIndex].y, 0, dst->h - 1));
drawPixel(*dst, dstPtr, outColor);
}
++srcPtr;
++currentX;
}
++currentY;
}
}
} // End of namespace BladeRunner
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