Java Code Examples for com.badlogic.gdx.graphics.glutils.FrameBuffer#dispose()

public void export(GLTFImage image, Texture texture, String baseName) {
	String fileName = baseName + ".png";
	image.uri = fileName;
	FileHandle file = folder.child(fileName);
	FrameBuffer fbo = new FrameBuffer(texture.getTextureData().getFormat(), texture.getWidth(), texture.getHeight(), false);
	fbo.begin();
	Gdx.gl.glClearColor(0, 0, 0, 0);
	Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
	SpriteBatch batch = new SpriteBatch();
	batch.getProjectionMatrix().setToOrtho2D(0, 0, 1, 1);
	batch.setBlendFunction(GL20.GL_SRC_ALPHA, GL20.GL_ONE);
	batch.begin();
	batch.draw(texture, 0, 0, 1, 1, 0, 0, 1, 1);
	batch.end();
	Pixmap pixmap = ScreenUtils.getFrameBufferPixmap(0, 0, texture.getWidth(), texture.getHeight());
	fbo.end();
	batch.dispose();
	fbo.dispose();
	savePNG(file, pixmap);
	pixmap.dispose();
}
 

/**
 * Creates an radiance map, to be used with {@link net.mgsx.gltf.scene3d.attributes.PBRCubemapAttribute#SpecularEnv}
 * generated cubemap contains mipmaps in order to perform roughness in PBR shading
 * @param levels mipMapLevels how many mipmaps level, eg. 10 levels produce a 1024x1024 cubemap with mipmaps.
 * @return generated cubemap, caller is responsible to dispose it when no longer used.
 */
public Cubemap buildRadianceMap(final int mipMapLevels){
	Pixmap[] maps = new Pixmap[mipMapLevels * 6];
	int index = 0;
	for(int level=0 ; level<mipMapLevels ; level++){
		int size = 1 << (mipMapLevels - level - 1);
		FrameBuffer fbo = new FrameBuffer(Format.RGBA8888, size, size, false);
		fbo.begin();
		for(int s=0 ; s<6 ; s++){
			Gdx.gl.glClearColor(0, 0, 0, 0);
			Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
			
			CubemapSide side = CubemapSide.values()[s];
			
			float blur = (float)level / (float)mipMapLevels;
			
			renderGradient(side, blur);
			renderLights(side, false);
			
			maps[index] = ScreenUtils.getFrameBufferPixmap(0, 0, size, size);
			index++;
		}
		fbo.end();
		fbo.dispose();
	}
	FacedMultiCubemapData data = new FacedMultiCubemapData(maps, mipMapLevels);
	Cubemap map = new Cubemap(data);
	map.setFilter(TextureFilter.MipMap, TextureFilter.Linear);
	return map;
}
 

public void takeScreenshot(String filename, int w) {

		// get viewport
		IntBuffer results = BufferUtils.newIntBuffer(16);
		Gdx.gl20.glGetIntegerv(GL20.GL_VIEWPORT, results);

		int h = (int) (w * getSceneCamera().viewportHeight / getSceneCamera().viewportWidth);

		FrameBuffer fbo = new FrameBuffer(Format.RGB565, w, h, false);

		fbo.begin();
		Gdx.gl.glClearColor(0, 0, 0, 1);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
		draw();
		Pixmap pixmap = ScreenUtils.getFrameBufferPixmap(0, 0, w, h);

		// restore viewport
		fbo.end(results.get(0), results.get(1), results.get(2), results.get(3));

		// Flip the pixmap upside down
		ByteBuffer pixels = pixmap.getPixels();
		int numBytes = w * h * 4;
		byte[] lines = new byte[numBytes];
		int numBytesPerLine = w * 4;
		for (int i = 0; i < h; i++) {
			pixels.position((h - i - 1) * numBytesPerLine);
			pixels.get(lines, i * numBytesPerLine, numBytesPerLine);
		}
		pixels.clear();
		pixels.put(lines);

		PixmapIO.writePNG(EngineAssetManager.getInstance().getUserFile(filename), pixmap);

		fbo.dispose();
	}
 

private TextureRegion createBgIcon(String atlas, String region) {
	TextureAtlas a = new TextureAtlas(
			Gdx.files.absolute(Ctx.project.getAssetPath() + Project.ATLASES_PATH + "/1/" + atlas + ".atlas"));
	AtlasRegion r = a.findRegion(region);

	if (r == null) {
		a.dispose();
		return null;
	}

	GLFrameBuffer.FrameBufferBuilder frameBufferBuilder = new GLFrameBuffer.FrameBufferBuilder(200,
			(int) (r.getRegionHeight() * 200f / r.getRegionWidth()));

	frameBufferBuilder.addColorTextureAttachment(GL30.GL_RGBA8, GL30.GL_RGBA, GL30.GL_UNSIGNED_BYTE);
	FrameBuffer fbo = frameBufferBuilder.build();

	SpriteBatch fboBatch = new SpriteBatch();
	fboBatch.setColor(Color.WHITE);
	OrthographicCamera camera = new OrthographicCamera();
	camera.setToOrtho(false, fbo.getWidth(), fbo.getHeight());
	fboBatch.setProjectionMatrix(camera.combined);

	Gdx.gl.glDisable(GL20.GL_SCISSOR_TEST);
	fbo.begin();
	fboBatch.begin();
	fboBatch.draw(r, 0, 0, fbo.getWidth(), fbo.getHeight());
	fboBatch.end();

	TextureRegion tex = ScreenUtils.getFrameBufferTexture(0, 0, fbo.getWidth(), fbo.getHeight());
	// tex.flip(false, true);

	fbo.end();
	Gdx.gl.glEnable(GL20.GL_SCISSOR_TEST);

	fbo.dispose();
	a.dispose();
	fboBatch.dispose();

	return tex;
}