GaussianBlur.java 文件源码

private void doBlurPass(FrameBuffer fboInput, boolean vertical) {
    GL20 gl = Gdx.gl20;
    gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    spriteBatch.setShader(blurPassShaderProgram);
    gl.glDisable(GL20.GL_BLEND);
    spriteBatch.begin();
    if (useInverseTarget) {
        blurPassShaderProgram.setUniformf("u_size",
                vertical ? horizontalOnePixelSize : verticalOnePixelSize,
                0);
    } else {
        blurPassShaderProgram.setUniformf("u_size",
                vertical ? 0 : horizontalOnePixelSize,
                vertical ? verticalOnePixelSize : 0);
    }
    blurPassShaderProgram.setUniform4fv("u_offsets", offsets, 0, 4);
    blurPassShaderProgram.setUniformf("u_weightAtCenter", weightAtCenter);
    blurPassShaderProgram.setUniform4fv("u_weights", weights, 0, 4);

    spriteBatch.draw(fboInput.getColorBufferTexture(), -1, -1, 2, 2);
    spriteBatch.end();
    spriteBatch.setShader(null);
}