Framebuffer.java 文件源码

public void createFramebuffer(int width, int height)
{
    this.framebufferWidth = width;
    this.framebufferHeight = height;
    this.framebufferTextureWidth = width;
    this.framebufferTextureHeight = height;

    if (!OpenGlHelper.isFramebufferEnabled())
    {
        this.framebufferClear();
    }
    else
    {
        this.framebufferObject = OpenGlHelper.glGenFramebuffers();
        this.framebufferTexture = TextureUtil.glGenTextures();

        if (this.useDepth)
        {
            this.depthBuffer = OpenGlHelper.glGenRenderbuffers();
        }

        this.setFramebufferFilter(9728);
        GlStateManager.bindTexture(this.framebufferTexture);
        GlStateManager.glTexImage2D(3553, 0, 32856, this.framebufferTextureWidth, this.framebufferTextureHeight, 0, 6408, 5121, (IntBuffer)null);
        OpenGlHelper.glBindFramebuffer(OpenGlHelper.GL_FRAMEBUFFER, this.framebufferObject);
        OpenGlHelper.glFramebufferTexture2D(OpenGlHelper.GL_FRAMEBUFFER, OpenGlHelper.GL_COLOR_ATTACHMENT0, 3553, this.framebufferTexture, 0);

        if (this.useDepth)
        {
            OpenGlHelper.glBindRenderbuffer(OpenGlHelper.GL_RENDERBUFFER, this.depthBuffer);
            OpenGlHelper.glRenderbufferStorage(OpenGlHelper.GL_RENDERBUFFER, 33190, this.framebufferTextureWidth, this.framebufferTextureHeight);
            OpenGlHelper.glFramebufferRenderbuffer(OpenGlHelper.GL_FRAMEBUFFER, OpenGlHelper.GL_DEPTH_ATTACHMENT, OpenGlHelper.GL_RENDERBUFFER, this.depthBuffer);
        }

        this.framebufferClear();
        this.unbindFramebufferTexture();
    }
}