234 lines
7.4 KiB
C++
234 lines
7.4 KiB
C++
// SPDX-License-Identifier: GPL-3.0-only
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/*
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* Prism Launcher - Minecraft Launcher
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* Copyright (c) 2023-2025 Trial97 <alexandru.tripon97@gmail.com>
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* Copyright (c) 2023 Rinth, Inc
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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, version 3.
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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 <https://www.gnu.org/licenses/>.
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*/
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#include "SkinModel.h"
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#include <QFileInfo>
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#include <QPainter>
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#include "FileSystem.h"
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static void setAlpha(QImage& image, const QRect& region, const int alpha)
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{
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for (int y = region.top(); y < region.bottom(); ++y) {
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QRgb* line = reinterpret_cast<QRgb*>(image.scanLine(y));
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for (int x = region.left(); x < region.right(); ++x) {
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QRgb pixel = line[x];
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line[x] = qRgba(qRed(pixel), qGreen(pixel), qBlue(pixel), alpha);
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}
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}
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}
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static void doNotchTransparencyHack(QImage& image)
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{
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for (int y = 0; y < 32; y++) {
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QRgb* line = reinterpret_cast<QRgb*>(image.scanLine(y));
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for (int x = 32; x < 64; x++) {
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if (qAlpha(line[x]) < 128) {
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return;
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}
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}
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}
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setAlpha(image, { 32, 0, 32, 32 }, 0);
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}
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static QImage improveSkin(QImage skin)
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{
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int height = skin.height();
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int width = skin.width();
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if (width != 64 || (height != 32 && height != 64)) { // this is no minecraft skin
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return skin;
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}
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// It seems some older skins may use this format, which can't be drawn onto
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// https://github.com/PrismLauncher/PrismLauncher/issues/4032
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// https://doc.qt.io/qt-6/qpainter.html#begin
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if (skin.format() == QImage::Format_Indexed8) {
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skin = skin.convertToFormat(QImage::Format_ARGB32);
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}
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auto isLegacy = height == 32; // old format
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if (isLegacy) {
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auto newSkin = QImage(QSize(64, 64), skin.format());
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newSkin.fill(Qt::transparent);
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QPainter p(&newSkin);
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p.drawImage(0, 0, skin);
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auto copyRect = [&p, &newSkin](int startX, int startY, int offsetX, int offsetY, int sizeX, int sizeY) {
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QImage region = newSkin.copy(startX, startY, sizeX, sizeY);
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region = region.mirrored(true, false);
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p.drawImage(startX + offsetX, startY + offsetY, region);
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};
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static const struct {
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int x;
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int y;
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int offsetX;
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int offsetY;
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int width;
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int height;
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} faces[] = {
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{ 4, 16, 16, 32, 4, 4 }, { 8, 16, 16, 32, 4, 4 }, { 0, 20, 24, 32, 4, 12 }, { 4, 20, 16, 32, 4, 12 },
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{ 8, 20, 8, 32, 4, 12 }, { 12, 20, 16, 32, 4, 12 }, { 44, 16, -8, 32, 4, 4 }, { 48, 16, -8, 32, 4, 4 },
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{ 40, 20, 0, 32, 4, 12 }, { 44, 20, -8, 32, 4, 12 }, { 48, 20, -16, 32, 4, 12 }, { 52, 20, -8, 32, 4, 12 },
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};
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for (const auto& face : faces) {
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copyRect(face.x, face.y, face.offsetX, face.offsetY, face.width, face.height);
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}
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doNotchTransparencyHack(newSkin);
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skin = newSkin;
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}
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static const QRect opaqueParts[] = {
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{ 0, 0, 32, 16 },
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{ 0, 16, 64, 16 },
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{ 16, 48, 32, 16 },
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};
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for (const auto& p : opaqueParts) {
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setAlpha(skin, p, 255);
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}
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return skin;
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}
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static QImage getSkin(const QString path)
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{
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return improveSkin(QImage(path));
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}
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static QImage generatePreviews(QImage texture, bool slim)
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{
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QImage preview(36, 36, QImage::Format_ARGB32);
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preview.fill(Qt::transparent);
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QPainter paint(&preview);
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// head
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paint.drawImage(4, 2, texture.copy(8, 8, 8, 8));
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paint.drawImage(4, 2, texture.copy(40, 8, 8, 8));
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// torso
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paint.drawImage(4, 10, texture.copy(20, 20, 8, 12));
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paint.drawImage(4, 10, texture.copy(20, 36, 8, 12));
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// right leg
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paint.drawImage(4, 22, texture.copy(4, 20, 4, 12));
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paint.drawImage(4, 22, texture.copy(4, 36, 4, 12));
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// left leg
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paint.drawImage(8, 22, texture.copy(20, 52, 4, 12));
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paint.drawImage(8, 22, texture.copy(4, 52, 4, 12));
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auto armWidth = slim ? 3 : 4;
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auto armPosX = slim ? 1 : 0;
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// right arm
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paint.drawImage(armPosX, 10, texture.copy(44, 20, armWidth, 12));
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paint.drawImage(armPosX, 10, texture.copy(44, 36, armWidth, 12));
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// left arm
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paint.drawImage(12, 10, texture.copy(36, 52, armWidth, 12));
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paint.drawImage(12, 10, texture.copy(52, 52, armWidth, 12));
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// back
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// head
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paint.drawImage(24, 2, texture.copy(24, 8, 8, 8));
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paint.drawImage(24, 2, texture.copy(56, 8, 8, 8));
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// torso
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paint.drawImage(24, 10, texture.copy(32, 20, 8, 12));
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paint.drawImage(24, 10, texture.copy(32, 36, 8, 12));
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// right leg
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paint.drawImage(24, 22, texture.copy(12, 20, 4, 12));
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paint.drawImage(24, 22, texture.copy(12, 36, 4, 12));
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// left leg
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paint.drawImage(28, 22, texture.copy(28, 52, 4, 12));
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paint.drawImage(28, 22, texture.copy(12, 52, 4, 12));
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// right arm
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paint.drawImage(armPosX + 20, 10, texture.copy(48 + armWidth, 20, armWidth, 12));
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paint.drawImage(armPosX + 20, 10, texture.copy(48 + armWidth, 36, armWidth, 12));
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// left arm
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paint.drawImage(32, 10, texture.copy(40 + armWidth, 52, armWidth, 12));
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paint.drawImage(32, 10, texture.copy(56 + armWidth, 52, armWidth, 12));
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return preview;
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}
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SkinModel::SkinModel(QString path) : m_path(path), m_texture(getSkin(path)), m_model(Model::CLASSIC)
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{
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m_preview = generatePreviews(m_texture, false);
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}
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SkinModel::SkinModel(QDir skinDir, QJsonObject obj)
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: m_capeId(obj["capeId"].toString()), m_model(Model::CLASSIC), m_url(obj["url"].toString())
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{
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auto name = obj["name"].toString();
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if (auto model = obj["model"].toString(); model == "SLIM") {
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m_model = Model::SLIM;
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}
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m_path = skinDir.absoluteFilePath(name) + ".png";
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m_texture = getSkin(m_path);
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m_preview = generatePreviews(m_texture, m_model == Model::SLIM);
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}
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QString SkinModel::name() const
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{
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return QFileInfo(m_path).completeBaseName();
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}
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bool SkinModel::rename(QString newName)
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{
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auto info = QFileInfo(m_path);
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auto new_path = FS::PathCombine(info.absolutePath(), newName + ".png");
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if (QFileInfo::exists(new_path)) {
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return false;
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}
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m_path = new_path;
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return FS::move(info.absoluteFilePath(), m_path);
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}
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QJsonObject SkinModel::toJSON() const
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{
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QJsonObject obj;
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obj["name"] = name();
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obj["capeId"] = m_capeId;
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obj["url"] = m_url;
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obj["model"] = getModelString();
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return obj;
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}
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QString SkinModel::getModelString() const
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{
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switch (m_model) {
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case CLASSIC:
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return "CLASSIC";
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case SLIM:
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return "SLIM";
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}
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return {};
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}
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bool SkinModel::isValid() const
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{
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return !m_texture.isNull() && (m_texture.size().height() == 32 || m_texture.size().height() == 64) && m_texture.size().width() == 64;
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}
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void SkinModel::refresh()
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{
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m_texture = getSkin(m_path);
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m_preview = generatePreviews(m_texture, m_model == Model::SLIM);
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}
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void SkinModel::setModel(Model model)
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{
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m_model = model;
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m_preview = generatePreviews(m_texture, m_model == Model::SLIM);
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}
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