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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 "graphics/palette.h"
#include "neverhood/resource.h"
#include "neverhood/resourceman.h"
#include "neverhood/screen.h"
#include "neverhood/subtitles.h"
namespace Neverhood {
namespace {
void drawSubtitles(Graphics::Surface *surf, const Common::String &str, const SubtitleGlyph *subfont,
int x0, byte outlineColor, byte alphaColor) {
if (!surf || surf->h < SubtitlePlayer::kSubtitleCharHeight || !subfont)
return;
byte *dest0 = (byte*)surf->getBasePtr(0, 0);
int lastx = MIN<int>(str.size() * SubtitlePlayer::kSubtitleCharWidth + x0 + 1, surf->w);
for (int16 yc = 0; yc < SubtitlePlayer::kSubtitleCharHeight; yc++) {
byte *dest = dest0 + yc * surf->pitch;
memset(dest, alphaColor, x0 + 2);
memset(dest + lastx, alphaColor, surf->w - lastx);
}
for (int i = 0; i < (int)str.size() && i * SubtitlePlayer::kSubtitleCharWidth < surf->w; i++) {
byte c = str[i];
byte *dest = dest0 + i * SubtitlePlayer::kSubtitleCharWidth + x0;
for (int16 yc = 0; yc < SubtitlePlayer::kSubtitleCharHeight; yc++) {
byte *row = dest;
// Outline of leftmost pixel
if (*row == alphaColor && (subfont[c].bitmap[yc] & 0x80))
*row = outlineColor;
row++;
for (int16 xc = 0; xc < SubtitlePlayer::kSubtitleCharWidth; xc++, row++) {
if ((subfont[c].bitmap[yc] << xc) & 0x80)
*row = 0xff;
else if ((subfont[c].outline[yc] << xc) & 0x80)
*row = outlineColor;
else if (xc != 0)
*row = alphaColor;
}
// Outline of rightmost pixel
*row = (subfont[c].bitmap[yc] & 0x1) ? outlineColor : alphaColor;
dest += surf->pitch;
}
}
}
}
SubtitlePlayer::SubtitlePlayer(NeverhoodEngine *vm, uint32 fileHash, int width) :
_vm(vm), _haveBottomSubs(false), _haveTopSubs(false), _currentFrame(-1), _isValid(false) {
if (!vm->getSubfont())
return;
_isValid = true;
_bottomSubs.create(width, kSubtitleCharHeight, Graphics::PixelFormat::createFormatCLUT8());
_topSubs.create(width, kSubtitleCharHeight, Graphics::PixelFormat::createFormatCLUT8());
Common::SeekableReadStream *s = vm->_res->createNhcStream(fileHash, kResNhcTypeSubtitles);
while (s && !s->eos()) {
Subtitle sub;
sub.fromFrame = s->readUint32LE();
sub.toFrame = s->readUint32LE();
sub.text = s->readString('\0', 40);
if (!sub.text.empty() && sub.text[0] == '^') {
sub.isTop = true;
sub.text = sub.text.substr(1);
} else {
sub.isTop = false;
}
_subtitles.push_back(sub);
}
delete s;
}
void SubtitlePlayer::renderFrame(uint frameNumber, int centerX) {
// Reuse old rendering if no frame has passed
if (_currentFrame == (int64)frameNumber)
return;
const SubtitleGlyph *subFont = _vm->getSubfont();
if (!subFont)
return;
int screenWidth = _bottomSubs.w;
_haveBottomSubs = false;
_haveTopSubs = false;
Graphics::PaletteLookup palLookup(_vm->_screen->getPaletteData(), 256);
byte outlineColor = palLookup.findBestColor(0, 0, 0);
_alphaColor = 0x77;
if (_alphaColor == outlineColor)
_alphaColor++;
// TODO: Optimize this
for (uint i = 0; i < _subtitles.size(); i++) {
if (frameNumber < _subtitles[i].fromFrame || frameNumber > _subtitles[i].toFrame)
continue;
Common::String curStr = _subtitles[i].text;
if ((int)curStr.size() > (screenWidth - 2) / SubtitlePlayer::kSubtitleCharWidth)
curStr = curStr.substr(0, screenWidth / SubtitlePlayer::kSubtitleCharWidth - 3) + "...";
int width = curStr.size() * SubtitlePlayer::kSubtitleCharWidth + 2;
int startX = MAX(MIN(centerX - width / 2, screenWidth - width), 0);
if (_subtitles[i].isTop) {
drawSubtitles(&_topSubs, curStr, subFont, startX, outlineColor, _alphaColor);
_haveTopSubs = true;
} else {
drawSubtitles(&_bottomSubs, curStr, subFont, startX, outlineColor, _alphaColor);
_haveBottomSubs = true;
}
}
}
}
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