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[1.18.1] Dynamic texture generation and loading

Jacob Sapoznikow

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Can someone please help me? I'm trying to create a dynamic texture (Via BufferedImage/Graphics2D) and it keeps crashing with "EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffc41cb2c70, pid=36820, tid=38756". Can someone help? I'll upload the file here.


package [REDACTED].spacecraft.overlay;

import com.mojang.blaze3d.platform.NativeImage;
import com.mojang.blaze3d.systems.RenderSystem;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.renderer.GameRenderer;
import net.minecraft.client.renderer.texture.DynamicTexture;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.Level;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import [REDACTED].spacecraft.SpaceCraft;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.nio.ByteBuffer;

import static com.mojang.blaze3d.platform.GlStateManager.SourceFactor.SRC_ALPHA;
import static com.mojang.blaze3d.platform.GlStateManager.SourceFactor.ONE;
import static com.mojang.blaze3d.platform.GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA;
import static com.mojang.blaze3d.platform.GlStateManager.DestFactor.ZERO;

@Mod.EventBusSubscriber(modid = SpaceCraft.MODID, bus = Mod.EventBusSubscriber.Bus.FORGE, value = Dist.CLIENT)
public class OxygenOverlay {
    public static DynamicTexture generateImage(int level) throws IOException {
        int width = 16, height = 46, offset = 1, value = (int) (46 * (level / 100.0f));

        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);
        Graphics2D g2d = img.createGraphics();

        g2d.setColor(new Color(48, 48, 48, 255));
        g2d.fillRect(0, 0, width, height);

        g2d.setColor(new Color(58, 211, 255, 192));
        g2d.fillRect(offset, offset + value, width - (offset * 2), (height - (offset * 2)) - value);

        g2d.setColor(new Color(70, 211, 255, 30));
        g2d.fillRect(offset, offset, width - (offset * 2), value);


        WritableRaster raster = img.getRaster();
        DataBufferByte data = (DataBufferByte) raster.getDataBuffer();
        ByteBuffer bytes = ByteBuffer.wrap(data.getData());

        NativeImage nativeImage = NativeImage.read(NativeImage.Format.RGBA, bytes);
        DynamicTexture texture = new DynamicTexture(nativeImage);

        return texture;

    public static void eventHandler(RenderGameOverlayEvent.Pre event) {
        if (event.getType() == RenderGameOverlayEvent.ElementType.ALL) {
            Player entity = Minecraft.getInstance().player;
            Gui gui = Minecraft.getInstance().gui;

            if(entity == null) return;

            Level world = entity.level;
            int posX = 10, posY = 10;
            double x = entity.getX(), y = entity.getY(), z = entity.getZ();

            RenderSystem.blendFuncSeparate(SRC_ALPHA, ONE_MINUS_SRC_ALPHA, ONE, ZERO);
            RenderSystem.setShaderColor(1, 1, 1, 1);

            try {
                Minecraft.getInstance().getTextureManager().register("spacecraft:oxygen_overlay", generateImage(0));
            } catch(IOException e) {

            ResourceLocation texture = new ResourceLocation(SpaceCraft.MODID, "oxygen_overlay.png");

            RenderSystem.setShaderTexture(0, texture);
            gui.blit(event.getMatrixStack(), posX, posY, 0, 0, 16, 46);

            RenderSystem.setShaderColor(1, 1, 1, 1);




Edited by Jacob Sapoznikow
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