Example usage for org.lwjgl.opengl EXTFramebufferObject GL_FRAMEBUFFER_BINDING_EXT

Introduction

In this page you can find the example usage for org.lwjgl.opengl EXTFramebufferObject GL_FRAMEBUFFER_BINDING_EXT.

Prototype

int GL_FRAMEBUFFER_BINDING_EXT

To view the source code for org.lwjgl.opengl EXTFramebufferObject GL_FRAMEBUFFER_BINDING_EXT.

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Document

Accepted by GetIntegerv().

Usage

From source file:itdelatrisu.opsu.render.CurveRenderState.java

License:Open Source License

/**
 * Draw a curve to the screen that's tinted with `color`. The first time
 * this is called this caches the image result of the curve and on subsequent
 * runs it just draws the cached copy to the screen.
 * @param color tint of the curve//from w w  w . j a va 2 s.c  om
 * @param borderColor the curve border color
 * @param curve the points along the curve to be drawn
 */
public void draw(Color color, Color borderColor, Vec2f[] curve) {
    float alpha = color.a;

    // if this curve hasn't been drawn, draw it and cache the result
    if (fbo == null) {
        FrameBufferCache cache = FrameBufferCache.getInstance();
        Rendertarget mapping = cache.get(hitObject);
        if (mapping == null)
            mapping = cache.insert(hitObject);
        fbo = mapping;

        int oldFb = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);
        int oldTex = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);

        //glGetInteger requires a buffer of size 16, even though just 4
        //values are returned in this specific case
        IntBuffer oldViewport = BufferUtils.createIntBuffer(16);
        GL11.glGetInteger(GL11.GL_VIEWPORT, oldViewport);
        EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, fbo.getID());
        GL11.glViewport(0, 0, fbo.width, fbo.height);
        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
        Colors.WHITE_FADE.a = 1.0f;
        this.draw_curve(color, borderColor, curve);
        color.a = 1f;

        GL11.glBindTexture(GL11.GL_TEXTURE_2D, oldTex);
        EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, oldFb);
        GL11.glViewport(oldViewport.get(0), oldViewport.get(1), oldViewport.get(2), oldViewport.get(3));
        Colors.WHITE_FADE.a = alpha;
    }

    // draw a fullscreen quad with the texture that contains the curve
    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_TEXTURE_1D);
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, fbo.getTextureID());
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glColor4f(1.0f, 1.0f, 1.0f, alpha);
    GL11.glTexCoord2f(1.0f, 1.0f);
    GL11.glVertex2i(fbo.width, 0);
    GL11.glTexCoord2f(0.0f, 1.0f);
    GL11.glVertex2i(0, 0);
    GL11.glTexCoord2f(0.0f, 0.0f);
    GL11.glVertex2i(0, fbo.height);
    GL11.glTexCoord2f(1.0f, 0.0f);
    GL11.glVertex2i(fbo.width, fbo.height);
    GL11.glEnd();
}

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From source file:itdelatrisu.opsu.render.Rendertarget.java

License:Open Source License

/**
 * Creates a Rendertarget with a Texture that it renders the color buffer in
 * and a renderbuffer that it renders the depth to.
 * @param width the width/*from  ww w  .j a v  a  2s . c om*/
 * @param height the height
*/
public static Rendertarget createRTTFramebuffer(int width, int height) {
    int old_framebuffer = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);
    int old_texture = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
    Rendertarget buffer = new Rendertarget(width, height);
    buffer.bind();

    int fboTexture = buffer.textureID;
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, fboTexture);
    GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, 4, width, height, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_INT,
            (ByteBuffer) null);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);

    EXTFramebufferObject.glBindRenderbufferEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT, buffer.depthBufferID);
    EXTFramebufferObject.glRenderbufferStorageEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT,
            GL11.GL_DEPTH_COMPONENT, width, height);
    EXTFramebufferObject.glFramebufferRenderbufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT,
            EXTFramebufferObject.GL_DEPTH_ATTACHMENT_EXT, EXTFramebufferObject.GL_RENDERBUFFER_EXT,
            buffer.depthBufferID);

    EXTFramebufferObject.glFramebufferTexture2DEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT,
            EXTFramebufferObject.GL_COLOR_ATTACHMENT0_EXT, GL11.GL_TEXTURE_2D, fboTexture, 0);

    GL11.glBindTexture(GL11.GL_TEXTURE_2D, old_texture);
    EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, old_framebuffer);

    return buffer;
}

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From source file:itemrender.client.rendering.FBOHelper.java

License:MIT License

public void begin() {
    checkGlErrors("FBO Begin Init");

    // Remember current framebuffer.
    lastFramebuffer = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);

    // Render to our texture
    EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, framebufferID);

    // Remember viewport info.
    lastViewport = GLAllocation.createDirectIntBuffer(16);
    GL11.glGetInteger(GL11.GL_VIEWPORT, lastViewport);
    GL11.glViewport(0, 0, renderTextureSize, renderTextureSize);

    GlStateManager.matrixMode(GL11.GL_MODELVIEW);
    GlStateManager.pushMatrix();/*  w  w w  . j a v  a  2 s  . co m*/
    GlStateManager.loadIdentity();

    // Remember current texture.
    lastTexture = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);

    GlStateManager.clearColor(0, 0, 0, 0);
    GlStateManager.clear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);

    GlStateManager.cullFace(GL11.GL_FRONT);
    GlStateManager.enableDepth();
    GlStateManager.enableLighting();
    GlStateManager.enableRescaleNormal();

    checkGlErrors("FBO Begin Final");
}

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From source file:itemrender.client.rendering.FBOHelper.java

License:MIT License

private void createFramebuffer() {
    framebufferID = EXTFramebufferObject.glGenFramebuffersEXT();
    textureID = GL11.glGenTextures();/*from  w w  w  .j  av a 2  s  . c om*/
    int currentFramebuffer = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);
    int currentTexture = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);

    EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, framebufferID);

    // Set our texture up, empty.
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, textureID);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
    GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, renderTextureSize, renderTextureSize, 0,
            GL12.GL_BGRA, GL11.GL_UNSIGNED_BYTE, (java.nio.ByteBuffer) null);

    // Restore old texture
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, currentTexture);

    // Create depth buffer
    depthbufferID = EXTFramebufferObject.glGenRenderbuffersEXT();
    EXTFramebufferObject.glBindRenderbufferEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT, depthbufferID);
    EXTFramebufferObject.glRenderbufferStorageEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT,
            GL11.GL_DEPTH_COMPONENT, renderTextureSize, renderTextureSize);

    // Bind depth buffer to the framebuffer
    EXTFramebufferObject.glFramebufferRenderbufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT,
            EXTFramebufferObject.GL_DEPTH_ATTACHMENT_EXT, EXTFramebufferObject.GL_RENDERBUFFER_EXT,
            depthbufferID);

    // Bind our texture to the framebuffer
    EXTFramebufferObject.glFramebufferTexture2DEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT,
            EXTFramebufferObject.GL_COLOR_ATTACHMENT0_EXT, GL11.GL_TEXTURE_2D, textureID, 0);

    // Revert to default framebuffer
    EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, currentFramebuffer);
}

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