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/*
* Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
* Copyright (C) 2021 cyoung06
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package kr.syeyoung.dungeonsguide.utils.cursor;
import com.sun.jna.Memory;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import kr.syeyoung.dungeonsguide.utils.RenderUtils;
import net.minecraft.client.Minecraft;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ResourceLocation;
import org.apache.commons.io.IOUtils;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.LWJGLUtil;
import org.lwjgl.input.Cursor;
import sun.misc.Unsafe;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
public class GLCursors {
private static Unsafe unsafe;
private static Class cursorElement;
private static Constructor constructor;
private static Field cursorField;
private static Map<EnumCursor, Cursor> enumCursorCursorMap = new HashMap<>();
static {
try {
Field f = Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
unsafe = (Unsafe) f.get(null);
cursorElement = Class.forName("org.lwjgl.input.Cursor$CursorElement");
constructor = cursorElement.getDeclaredConstructor(Object.class, long.class, long.class);
constructor.setAccessible(true);
cursorField = Cursor.class.getDeclaredField("cursors");
cursorField.setAccessible(true);
} catch (NoSuchFieldException | IllegalAccessException | ClassNotFoundException | NoSuchMethodException e) {
e.printStackTrace();
}
}
public static void setupCursors() {
if (enumCursorCursorMap.size() != 0) return;
int platform = LWJGLUtil.getPlatform();
for (EnumCursor value : EnumCursor.values()) {
Cursor c = null;
try {
switch(platform) {
case LWJGLUtil.PLATFORM_WINDOWS:
if (value.getWindows() != -1)
c = createCursorWindows(value.getWindows());
break;
case LWJGLUtil.PLATFORM_LINUX:
if (value.getLinux() != -1)
c = createCursorLinux(value.getLinux());
break;
case LWJGLUtil.PLATFORM_MACOSX:
if (value.getMacos() != null)
c = createCursorMac(value.getMacos());
break;
}
} catch (Throwable e) {
System.out.println("Error occured while loading cursor: "+value);
e.printStackTrace();
}
try {
if (c == null) {
int hotspotX = 0, hotspotY = 0;
BufferedImage bufferedImage = null;
int minC = Cursor.getMinCursorSize(), maxC = Cursor.getMaxCursorSize();
try {
ResourceLocation cursorinfo = new ResourceLocation("dungeonsguide:cursors/"+value.getAltFileName());
List<CursorReader.CursorData> cursorDataList = CursorReader.readFromInputStream(Minecraft.getMinecraft().getResourceManager().getResource(cursorinfo).getInputStream());
List<CursorReader.CursorData> cursorDataList2 = cursorDataList.stream()
.filter(cdata -> cdata.getBufferedImage() != null)
.filter(cdata -> minC <= cdata.getHeight() && cdata.getHeight() <= maxC && minC <= cdata.getWidth() && cdata.getWidth() <= maxC)
.sorted(Comparator.comparingInt(CursorReader.CursorData::getWidth)).collect(Collectors.toList());
CursorReader.CursorData cursorData =
cursorDataList2.size() == 0 ? cursorDataList.get(0) : cursorDataList2.get(0);
System.out.println(cursorData);
bufferedImage = cursorData.getBufferedImage();
hotspotX = cursorData.getXHotSpot();
hotspotY = cursorData.getYHotSpot();
} catch (Throwable t) {t.printStackTrace();}
int width = bufferedImage == null ? 16 : bufferedImage.getWidth();
int height = bufferedImage == null ? 16 : bufferedImage.getHeight();
int effWidth = MathHelper.clamp_int(width, Cursor.getMinCursorSize(), Cursor.getMaxCursorSize());
int effHeight = MathHelper.clamp_int(height, Cursor.getMinCursorSize(), Cursor.getMaxCursorSize());
int length = effHeight * effWidth;
IntBuffer intBuffer = BufferUtils.createIntBuffer(length);
for (int i = 0; i < length; i++) {
int x = i % effWidth;
int y = i / effWidth;
if (bufferedImage == null) {
intBuffer.put(RenderUtils.getChromaColorAt(x,y,1.0f, 1.0f, 1.0f, 1.0f));
} else if (x >= width || y >= height) {
intBuffer.put(0);
} else {
intBuffer.put(bufferedImage.getRGB(x, height - y - 1));
}
}
intBuffer.flip();
c = new Cursor(effWidth, effHeight, hotspotX, height - hotspotY - 1,1,intBuffer, null);
}
} catch (Throwable e) {
System.out.println("Error occured while loading cursor from resource: "+value);
e.printStackTrace();
}
if (c != null) {
try {
Object arr = cursorField.get(c);
Object cursor = Array.get(arr, 0);
for (Field declaredField : cursor.getClass().getDeclaredFields()) {
declaredField.setAccessible(true);
Object obj = declaredField.get(cursor);
System.out.println(declaredField.getName()+": "+obj+" - "+(obj instanceof ByteBuffer));
if (obj instanceof ByteBuffer) {
ByteBuffer b = (ByteBuffer) declaredField.get(cursor);
StringBuilder sb = new StringBuilder("Contents: ");
for (int i = 0; i < b.limit(); i++) {
sb.append(Integer.toHexString(b.get(i) & 0xFF)).append(" ");
}
System.out.println(sb.toString());
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
}
enumCursorCursorMap.put(value, c);
}
}
}
public static Cursor getCursor(EnumCursor enumCursor) {
return enumCursorCursorMap.get(enumCursor);
}
private static Cursor createCursorWindows(int cursor) throws LWJGLException, InstantiationException, InvocationTargetException, IllegalAccessException {
User32 user32 = User32.INSTANCE;
Pointer hIcon = user32
.LoadCursorW(Pointer.NULL, cursor);
long ptrVal = Pointer.nativeValue(hIcon);
ByteBuffer handle = BufferUtils.createByteBuffer(Pointer.SIZE); // Why does it have to be direct? well it crashes without it.
if (handle.order() == ByteOrder.LITTLE_ENDIAN) {
for (int i = 0; i < Pointer.SIZE; i++) {
byte value = (byte) ((ptrVal >> i * 8) & 0xFF);
handle.put(value);
}
} else {
for (int i = Pointer.SIZE; i >= 0; i++) {
byte value = (byte) ((ptrVal >> i * 8) & 0xFF);
handle.put(value);
}
}
handle.position(0);
return createCursor(handle);
}
private static Cursor createCursorLinux(int cursor) throws LWJGLException, InstantiationException, InvocationTargetException, IllegalAccessException {
X11.Display display = X11.INSTANCE.XOpenDisplay(null);
Pointer fontCursor = X11.INSTANCE.XCreateFontCursor(display, cursor);
long iconPtr = Pointer.nativeValue(fontCursor);
return createCursor(iconPtr);
}
private static Cursor createCursorMac(String cursor) throws LWJGLException, InstantiationException, InvocationTargetException, IllegalAccessException {
// trust me, it's horrible.
Foundation foundation = Foundation.INSTANCE;
Pointer nsCursor = foundation.objc_getClass("NSCursor");
Pointer selector = foundation.sel_registerName(cursor);
Pointer thePointer = foundation.objc_msgSend(nsCursor, selector);
long iconPtr = Pointer.nativeValue(thePointer);
return createCursor(iconPtr);
}
private static Cursor createCursor(Object handle) throws IllegalAccessException, InvocationTargetException, InstantiationException {
// Yes. I had no way.
Cursor ADANGEROUSOBJECT = (Cursor) unsafe.allocateInstance(Cursor.class);
Object cursorElement = constructor.newInstance(handle, 0, LWJGLUtil.getPlatform() == LWJGLUtil.PLATFORM_LINUX ? -1 : System.currentTimeMillis());
Object array = Array.newInstance(GLCursors.cursorElement, 1);
Array.set(array, 0, cursorElement);
cursorField.set(ADANGEROUSOBJECT, array);
return ADANGEROUSOBJECT;
}
}
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