Example usage for org.lwjgl.opengl GL11 GL_TEXTURE_WIDTH

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL11 GL_TEXTURE_WIDTH.

Prototype

int GL_TEXTURE_WIDTH

To view the source code for org.lwjgl.opengl GL11 GL_TEXTURE_WIDTH.

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Document

GetTextureParameter

Usage

From source file:vazkii.botania.client.core.handler.MiscellaneousIcons.java

License:Open Source License

@SubscribeEvent
public void dumpAtlas(ArrowLooseEvent evt) {
    if (!evt.getEntityPlayer().worldObj.isRemote
            || !((Boolean) Launch.blackboard.get("fml.deobfuscatedEnvironment"))
            || !evt.getEntityPlayer().isSneaking())
        return;//from   w w  w .  ja va2  s.  c om
    Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);

    int width = GL11.glGetTexLevelParameteri(GL11.GL_TEXTURE_2D, 0, GL11.GL_TEXTURE_WIDTH);
    int height = GL11.glGetTexLevelParameteri(GL11.GL_TEXTURE_2D, 0, GL11.GL_TEXTURE_HEIGHT);

    Botania.LOGGER.debug("Dumped atlas %d wide by %d tall%n", width, height);

    int pixels = width * height;

    IntBuffer buffer = BufferUtils.createIntBuffer(pixels);
    int[] pixelValues = new int[pixels];

    GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
    GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);

    GL11.glGetTexImage(GL11.GL_TEXTURE_2D, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, buffer);

    buffer.get(pixelValues);

    BufferedImage bufferedimage = new BufferedImage(width, height, 2);

    for (int k = 0; k < height; ++k) {
        for (int l = 0; l < width; ++l) {
            bufferedimage.setRGB(l, k, pixelValues[k * width + l]);
        }
    }

    File mcFolder = Minecraft.getMinecraft().mcDataDir;
    File result = new File(mcFolder, "atlas.png");

    try {
        ImageIO.write(bufferedimage, "png", result);
    } catch (IOException e) {
        Botania.LOGGER.warn("Failed to dump debug atlas");
    }
}

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