PictureSign 1.0.0 - Initial release!

src/main/java/eu/midnightdust/picturesign/PictureDownloader.java

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+package eu.midnightdust.picturesign;
+
+import eu.midnightdust.picturesign.config.PictureSignConfig;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.texture.NativeImage;
+import net.minecraft.client.texture.NativeImageBackedTexture;
+import net.minecraft.util.Identifier;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.*;
+import java.net.URL;
+import java.util.Hashtable;
+import java.util.concurrent.ExecutorService;
+
+import static java.util.concurrent.Executors.newFixedThreadPool;
+
+public class PictureDownloader {
+
+    public static class PictureData {
+        public String url;
+        public Identifier identifier;
+
+        public PictureData(String url) {
+            this.url = url;
+        }
+    }
+    static PictureDownloader downloader = new PictureDownloader();
+
+    public static PictureDownloader getInstance() {
+        return downloader;
+    }
+
+    // Create a service for downloading the picture
+    private final ExecutorService service = newFixedThreadPool(PictureSignConfig.maxThreads);
+
+    private final Hashtable<String, PictureData> cache = new Hashtable<>();
+
+    private final Object mutex = new Object();
+
+    // Downloads the picture, or returns the cached picture
+    public PictureData getPicture(String url) {
+        synchronized (mutex) {
+            // Try to get the picture from cache
+            PictureData data = this.cache.get(url);
+            if (data == null) {
+                // Download the picture if not in cache
+                this.downloadPicture(url);
+                return null;
+            }
+
+            if (data.identifier == null) {
+                return null;
+            }
+
+            return data;
+        }
+    }
+
+    // Download the image and save it in cache
+    private void downloadPicture(String url) {
+        if (PictureSignConfig.debug) PictureSignClient.LOGGER.info("Started downloading picture: " + url);
+        this.cache.put(url, new PictureData(url));
+
+        service.submit(() -> {
+            try {
+                BufferedInputStream in = new BufferedInputStream(new URL(url).openStream());
+                File file = File.createTempFile(".picturesign", "temp");
+                file.deleteOnExit();
+
+                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
+
+                byte[] dataBuffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
+                    out.write(dataBuffer, 0, bytesRead);
+                }
+
+                out.close();
+
+                // Convert to png
+                BufferedImage bufferedImage = ImageIO.read(file);
+
+                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+                ImageIO.write(bufferedImage, "png", byteArrayOutputStream);
+
+                InputStream inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
+
+                NativeImage nativeImage = NativeImage.read(inputStream);
+                NativeImageBackedTexture nativeImageBackedTexture = new NativeImageBackedTexture(nativeImage);
+
+                Identifier texture = MinecraftClient.getInstance().getTextureManager().registerDynamicTexture("picturesign/image",
+                        nativeImageBackedTexture);
+
+                // Cache the downloaded picture
+                synchronized (mutex) {
+                    PictureData data = this.cache.get(url);
+                    data.identifier = texture;
+                }
+
+                if (PictureSignConfig.debug) PictureSignClient.LOGGER.info("Finished downloading picture: " + url);
+
+            } catch (IOException error) {
+                PictureSignClient.LOGGER.error("Error downloading picture: " + error);
+            }
+        });
+    }
+}
+

src/main/java/eu/midnightdust/picturesign/PictureSignClient.java

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+package eu.midnightdust.picturesign;
+
+import eu.midnightdust.picturesign.config.PictureSignConfig;
+import net.fabricmc.api.ClientModInitializer;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class PictureSignClient implements ClientModInitializer {
+    public static Logger LOGGER = LogManager.getLogger("PictureSign");
+    @Override
+    public void onInitializeClient() {
+        PictureSignConfig.init("picturesign", PictureSignConfig.class);
+    }
+}

src/main/java/eu/midnightdust/picturesign/config/PictureSignConfig.java

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+package eu.midnightdust.picturesign.config;
+
+import eu.midnightdust.lib.config.MidnightConfig;
+
+public class PictureSignConfig extends MidnightConfig {
+    @Entry public static boolean enabled = true;
+    @Entry public static boolean debug = false;
+    @Entry(min = 1, max = 10) public static int maxThreads = 4;
+}

src/main/java/eu/midnightdust/picturesign/mixin/MixinSignBlockEntityRenderer.java

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+package eu.midnightdust.picturesign.mixin;
+
+import eu.midnightdust.picturesign.config.PictureSignConfig;
+import eu.midnightdust.picturesign.render.PictureSignRenderer;
+import net.minecraft.block.entity.SignBlockEntity;
+import net.minecraft.client.render.*;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+import net.minecraft.client.render.block.entity.SignBlockEntityRenderer;
+import net.minecraft.client.util.math.MatrixStack;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(SignBlockEntityRenderer.class)
+public abstract class MixinSignBlockEntityRenderer implements BlockEntityRenderer<SignBlockEntity> {
+    PictureSignRenderer psRenderer = new PictureSignRenderer();
+
+    @Inject(at = @At("HEAD"), method = "render")
+    public void ps$onRender(SignBlockEntity signBlockEntity, float f, MatrixStack matrixStack, VertexConsumerProvider vertexConsumerProvider, int light, int overlay, CallbackInfo ci) {
+        if (PictureSignConfig.enabled && signBlockEntity.getTextOnRow(0,false).getString().matches("(!PS:.*)")) {
+            psRenderer.render(signBlockEntity, matrixStack, light, overlay);
+        }
+    }
+    @Inject(at = @At("HEAD"), method = "shouldRender", cancellable = true)
+    private static void shouldRender(SignBlockEntity sign, int signColor, CallbackInfoReturnable<Boolean> cir) {
+        if (PictureSignConfig.enabled && sign.getTextOnRow(0,false).getString().matches("(!PS:.*)")) cir.setReturnValue(true);
+    }
+}

src/main/java/eu/midnightdust/picturesign/render/PictureSignRenderer.java

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+package eu.midnightdust.picturesign.render;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import eu.midnightdust.picturesign.PictureDownloader;
+import net.minecraft.block.entity.SignBlockEntity;
+import net.minecraft.client.render.*;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.state.property.Properties;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.math.Matrix4f;
+import net.minecraft.util.math.Quaternion;
+import net.minecraft.util.math.Vec3f;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class PictureSignRenderer {
+
+    public void render(SignBlockEntity signBlockEntity, MatrixStack matrixStack, int light, int overlay) {
+        String text = signBlockEntity.getTextOnRow(0, false).getString() +
+                signBlockEntity.getTextOnRow(1, false).getString() +
+                signBlockEntity.getTextOnRow(2, false).getString();
+        String url = text.replaceAll("!PS:", "").replaceAll(" ","");
+        if (url.contains("imgur:")) url = url.replace("imgur:", "https://i.imgur.com/");
+        if (url.contains("imgbb:")) url = url.replace("imgbb:", "https://i.ibb.co/");
+        if (!url.contains("https://") && !url.contains("http://")) {
+            url = "https://" + url;
+        }
+        if (!url.contains(".png") && !url.contains(".jpg") && !url.contains(".jpeg")) return;
+        String lastLine = signBlockEntity.getTextOnRow(3, false).getString();
+
+        if (!lastLine.matches("(.*\\d:.*\\d:.*\\d:.*\\d:.*\\d)")) return;
+
+        List<String> scale = Arrays.stream(lastLine.split(":")).toList();
+        float width = 0;
+        float height = 0;
+        float x = 0;
+        float y = 0;
+        float z = 0;
+        try {
+            width = Float.parseFloat(scale.get(0));
+            height = Float.parseFloat(scale.get(1));
+            x = Float.parseFloat(scale.get(2));
+            y = Float.parseFloat(scale.get(3));
+            z = Float.parseFloat(scale.get(4));
+        }
+        catch (NumberFormatException ignored) {}
+
+        // Download the picture data
+        PictureDownloader.PictureData data = PictureDownloader.getInstance().getPicture(url);
+        if (data == null || data.identifier == null) {
+            return;
+        }
+
+        float xOffset = 0.0F;
+        float zOffset = 0.0F;
+
+        Quaternion yRotation = Vec3f.POSITIVE_Y.getDegreesQuaternion(0F);
+
+        if (signBlockEntity.getCachedState().contains(Properties.HORIZONTAL_FACING)) {
+            Direction direction = signBlockEntity.getCachedState().get(Properties.HORIZONTAL_FACING);
+            switch (direction) {
+                case NORTH -> {
+                    zOffset = 1.01F;
+                    xOffset = 1.0F;
+                    yRotation = Vec3f.POSITIVE_Y.getDegreesQuaternion(180.0F);
+                }
+                case SOUTH -> zOffset = 0.010F;
+                case EAST -> {
+                    zOffset = 1.01F;
+                    yRotation = Vec3f.POSITIVE_Y.getDegreesQuaternion(90.0F);
+                }
+                case WEST -> {
+                    yRotation = Vec3f.POSITIVE_Y.getDegreesQuaternion(-90.0F);
+                    xOffset = 1.01F;
+                }
+            }
+        }
+        else if (signBlockEntity.getCachedState().contains(Properties.ROTATION)) {
+            yRotation = Vec3f.POSITIVE_Y.getDegreesQuaternion(signBlockEntity.getCachedState().get(Properties.ROTATION) * -22.5f);
+        }
+        else return;
+
+
+        Tessellator tessellator = Tessellator.getInstance();
+        BufferBuilder buffer = tessellator.getBuffer();
+
+        matrixStack.push();
+
+        RenderSystem.setShader(GameRenderer::getPositionTexShader);
+        RenderSystem.setShaderTexture(0, data.identifier);
+
+        RenderSystem.disableBlend();
+        RenderSystem.enableDepthTest();
+        RenderSystem.depthMask(true);
+
+        matrixStack.translate(xOffset + x, 0.00F + y, zOffset + z);
+        matrixStack.multiply(yRotation);
+
+        Matrix4f matrix4f = matrixStack.peek().getModel();
+        buffer.begin(VertexFormat.DrawMode.QUADS, VertexFormats.POSITION_TEXTURE_COLOR);
+
+        buffer.vertex(matrix4f, width, 0.0F, 1.0F).texture(1.0F, 1.0F).color(255, 255, 255, 255)
+                .light(light).overlay(overlay).next();
+
+        buffer.vertex(matrix4f, width, height, 1.0F).texture(1.0F, 0.0F).color(255, 255, 255, 255)
+                .light(light).overlay(overlay).next();
+
+        buffer.vertex(matrix4f, 0.0F, height, 1.0F).texture(0.0F, 0.0F).color(255, 255, 255, 255)
+                .light(light).overlay(overlay).next();
+
+        buffer.vertex(matrix4f, 0.0F, 0.0F, 1.0F).texture(0.0F, 1.0F).color(255, 255, 255, 255)
+                .light(light).overlay(overlay).next();
+
+        tessellator.draw();
+        matrixStack.pop();
+
+        RenderSystem.disableDepthTest();
+    }
+}

src/main/resources/assets/picturesign/lang/en_us.json

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+{
+	"picturesign.midnightconfig.title":"PictureSign Config",
+	
+	"picturesign.midnightconfig.enabled":"Enabled",
+	"picturesign.midnightconfig.debug":"Send debug info",
+	"picturesign.midnightconfig.maxThreads":"Max download threads"
+}

src/main/resources/fabric.mod.json

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+{
+  "schemaVersion": 1,
+  "id": "picturesign",
+  "version": "${version}",
+
+  "name": "PictureSign",
+  "description": "Use signs to display custom images completely client-side!",
+  "authors": [
+    "Motschen",
+    "TeamMidnightDust"
+  ],
+  "contact": {
+    "homepage": "https://www.midnightdust.eu/",
+    "sources": "https://github.com/TeamMidnightDust/PictureSign",
+    "issues": "https://github.com/TeamMidnightDust/PictureSign/issues"
+  },
+
+  "license": "MIT",
+  "icon": "assets/picturesign/icon.png",
+
+  "environment": "client",
+  "entrypoints": {
+    "client": [
+      "eu.midnightdust.picturesign.PictureSignClient"
+    ]
+  },
+
+  "depends": {
+    "midnightlib": "*"
+  },
+  "mixins": [
+    "picturesign.mixins.json"
+  ]
+}

src/main/resources/picturesign.mixins.json

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+{
+  "required": true,
+  "package": "eu.midnightdust.picturesign.mixin",
+  "compatibilityLevel": "JAVA_16",
+  "client": [
+    "MixinSignBlockEntityRenderer"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}