Java Code Examples for com.jogamp.opengl.GL3#glBindBuffer()

private boolean initVertexArray(GL3 gl3) {

        gl3.glGenVertexArrays(Program.MAX, vertexArrayName);
        gl3.glBindVertexArray(vertexArrayName.get(Program.TEXTURE));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, 0);
            gl3.glVertexAttribPointer(Semantic.Attr.TEXCOORD, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, Vec2.SIZE);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
            gl3.glEnableVertexAttribArray(Semantic.Attr.TEXCOORD);

            gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        }
        gl3.glBindVertexArray(0);

        gl3.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        gl3.glBindVertexArray(0);

        return true;
    }
 

private boolean initVertexArray(GL3 gl3) {
    // Build a vertex array object
    gl3.glGenVertexArrays(1, vertexArrayName);
    gl3.glBindVertexArray(vertexArrayName.get(0));
    {
        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, Vec2.SIZE, 0);

        gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
    }
    gl3.glBindVertexArray(0);

    return checkError(gl3, "initVertexArray");
}
 

private boolean initVertexArray(GL3 gl3) {

        gl3.glGenVertexArrays(1, vertexArrayName);
        gl3.glBindVertexArray(vertexArrayName.get(0));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(0));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, 0);
            gl3.glVertexAttribPointer(Semantic.Attr.TEXCOORD, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, Vec2.SIZE);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
            gl3.glEnableVertexAttribArray(Semantic.Attr.TEXCOORD);
        }
        gl3.glBindVertexArray(0);

        return checkError(gl3, "initVertexArray");
    }
 

private boolean initBuffer(GL3 gl3) {

        FloatBuffer positionBuffer = GLBuffers.newDirectFloatBuffer(positionData);
        IntBuffer uniformBufferOffset = GLBuffers.newDirectIntBuffer(1);

        gl3.glGenBuffers(Buffer.MAX, bufferName);

        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        gl3.glBufferData(GL_ARRAY_BUFFER, positionSize, positionBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        gl3.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffset);
        int uniformBlockSize = Math.max(Mat4.SIZE, uniformBufferOffset.get(0));

        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl3.glBufferData(GL_UNIFORM_BUFFER, uniformBlockSize, null, GL_DYNAMIC_DRAW);
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        BufferUtils.destroyDirectBuffer(positionBuffer);
        BufferUtils.destroyDirectBuffer(uniformBufferOffset);

        return checkError(gl3, "initBuffer");
    }
 

private boolean initVertexArray(GL3 gl3) {

        gl3.glGenVertexArrays(1, vertexArrayName);
        gl3.glBindVertexArray(vertexArrayName.get(0));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, Vertex_v2fv2f.SIZE, 0);
            gl3.glVertexAttribPointer(Semantic.Attr.TEXCOORD, 2, GL_FLOAT, false, Vertex_v2fv2f.SIZE, Vec2.SIZE);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
            gl3.glEnableVertexAttribArray(Semantic.Attr.TEXCOORD);

            gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        }
        gl3.glBindVertexArray(0);

        return true;
    }
 

private void bufferSubData(final GL3 gl, final int target, final int offset, final int sizeLimit, final int itemSize, final Buffer buffer) {
    if (!initialised) {
        throw new RenderException("Can't buffer data before initialising the batch");
    }
    final int size = buffer.limit() - buffer.position();
    if (offset + size > sizeLimit) {
        throw new RenderException("Data size exceeds size of the specified target");
    }
    final int bufferName = getOrCreateBufferName(gl, target);
    gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, bufferName);
    gl.glBufferSubData(GL3.GL_ARRAY_BUFFER, offset * itemSize, size * itemSize, buffer);
}
 

@Override
protected boolean render(GL gl) {

    GL3 gl3 = (GL3) gl;

    {
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl3.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, 4.0f / 3.0f, 0.1f, 100.0f);
        Mat4 model = new Mat4(1.0f);
        Mat4 mvp = projection.mul(viewMat4()).mul(model);

        pointer.asFloatBuffer().put(mvp.toFa_());

        // Make sure the uniform buffer is uploaded
        gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl3.glViewport(0, 0, windowSize.x, windowSize.y);
    clearColor.put(new float[]{1.0f, 0.5f, 0.0f, 1.0f}).rewind();
    gl3.glClearBufferfv(GL_COLOR, 0, clearColor);

    gl3.glUseProgram(programName);
    gl3.glUniform1i(uniformDiffuse, 0);
    gl3.glUniformBlockBinding(programName, uniformTransform, Semantic.Uniform.TRANSFORM0);

    gl3.glActiveTexture(GL_TEXTURE0);
    gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(0));
    gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl3.glBindVertexArray(vertexArrayName.get(0));

    gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);

    return true;
}
 

private boolean initVertexArray(GL3 gl3) {

        gl3.glGenVertexArrays(Program.MAX, vertexArrayName);

        gl3.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, 0);
            gl3.glVertexAttribPointer(Semantic.Attr.TEXCOORD, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, Vec2.SIZE);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
            gl3.glEnableVertexAttribArray(Semantic.Attr.TEXCOORD);

            gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        }
        gl3.glBindVertexArray(0);

        gl3.glBindVertexArray(vertexArrayName.get(Program.LAYERING));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, glf.Vertex_v2fv2f.SIZE, 0);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);

            gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        }
        gl3.glBindVertexArray(0);

        return checkError(gl3, "initVertexArray");
    }
 

@Override
protected boolean render(GL gl) {

    GL3 gl3 = (GL3) gl;

    {
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer transformBuffer = gl3.glMapBufferRange(GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f,
                (float) windowSize.x / windowSize.y, 0.1f, 100.0f);
        Mat4 model = new Mat4(1.0f);
        Mat4 mvp = projection.mul(viewMat4()).mul(model);

        transformBuffer.asFloatBuffer().put(mvp.toFa_());

        // Make sure the uniform buffer is uploaded
        gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);
    }

    gl3.glViewport(0, 0, windowSize.x, windowSize.y);
    gl3.glClearBufferfv(GL_COLOR, 0, new float[]{0.0f, 0.0f, 0.0f, 1.0f}, 0);

    gl3.glUseProgram(programName);

    // Attach the buffer to UBO binding point semantic::uniform::TRANSFORM0
    gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    // Attach the buffer to UBO binding point semantic::uniform::MATERIAL
    gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL));

    gl3.glBindVertexArray(vertexArrayName.get(0));
    gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);

    return true;
}
 

private boolean initBuffer(GL3 gl3) {

        ShortBuffer elementBuffer = GLBuffers.newDirectShortBuffer(elementData);
        FloatBuffer vertexBuffer = GLBuffers.newDirectFloatBuffer(vertexData);
        IntBuffer uniformBufferOffsetAlignment = GLBuffers.newDirectIntBuffer(1);

        gl3.glGenBuffers(Buffer.MAX, bufferName);

        gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        gl3.glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementSize, elementBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        gl3.glBufferData(GL_ARRAY_BUFFER, vertexSize, vertexBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        gl3.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffsetAlignment);
        uniformBufferOffsetAlignment.put(0, glm.ceilMultiple(Mat4.SIZE, uniformBufferOffsetAlignment.get(0)));

        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl3.glBufferData(GL_UNIFORM_BUFFER, uniformBufferOffsetAlignment.get(0) * 2, null, GL_DYNAMIC_DRAW);
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        BufferUtils.destroyDirectBuffer(elementBuffer);
        BufferUtils.destroyDirectBuffer(vertexBuffer);
        BufferUtils.destroyDirectBuffer(uniformBufferOffsetAlignment);

        return true;
    }
 

private boolean initVertexArray(GL3 gl3) {

        gl3.glGenVertexArrays(1, vertexArrayName);
        gl3.glBindVertexArray(vertexArrayName.get(0));
        {
            gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
            gl3.glVertexAttribPointer(Semantic.Attr.POSITION, 2, GL_FLOAT, false, 0, 0);
            gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

            gl3.glEnableVertexAttribArray(Semantic.Attr.POSITION);
        }
        gl3.glBindVertexArray(0);

        return checkError(gl3, "initVertexArray");
    }
 

private boolean initBuffer(GL3 gl3) {

        ShortBuffer elementBuffer = GLBuffers.newDirectShortBuffer(elementData);
        FloatBuffer vertexBuffer = GLBuffers.newDirectFloatBuffer(vertexData);
        IntBuffer uniformBufferOffset = GLBuffers.newDirectIntBuffer(1);

        gl3.glGenBuffers(Buffer.MAX, bufferName);

        gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferName.get(Buffer.ELEMENT));
        gl3.glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementSize, elementBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        gl3.glBufferData(GL_ARRAY_BUFFER, vertexSize, vertexBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        gl3.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffset);
        int uniformBlockSize = Math.max(Mat4.SIZE, uniformBufferOffset.get(0));

        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl3.glBufferData(GL_UNIFORM_BUFFER, uniformBlockSize, null, GL_DYNAMIC_DRAW);
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        BufferUtils.destroyDirectBuffer(elementBuffer);
        BufferUtils.destroyDirectBuffer(vertexBuffer);
        BufferUtils.destroyDirectBuffer(uniformBufferOffset);

        return checkError(gl3, "initBuffer");
    }
 

@Override
protected boolean render(GL gl) {

    GL3 gl3 = (GL3) gl;

    {
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl3.glMapBufferRange(GL_UNIFORM_BUFFER,
                0, Mat4.SIZE, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, (float) windowSize.x / windowSize.y, 0.1f, 100.0f);

        pointer.asFloatBuffer().put(projection.mul(viewMat4()).toFa_());

        // Make sure the uniform buffer is uploaded
        gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    {
        gl3.glEnable(GL_DEPTH_TEST);
        gl3.glDepthFunc(GL_LESS);

        gl3.glViewport(0, 0, windowSize.x * framebufferScale, windowSize.y * framebufferScale);

        gl3.glBindFramebuffer(GL_FRAMEBUFFER, framebufferName.get(0));

        gl3.glClearBufferfv(GL_DEPTH, 0, clearDepth);
        gl3.glClearBufferfv(GL_COLOR, 0, clearColorSRGB);

        // TextureName[texture::DIFFUSE] is a sRGB texture which sRGB conversion on fetch has been disabled
        // Hence in the shader, the value is stored as sRGB so we should not convert it to sRGB.
        gl3.glUseProgram(programName[Program.TEXTURE]);

        gl3.glActiveTexture(GL_TEXTURE0);
        gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.DIFFUSE));
        gl3.glBindVertexArray(vertexArrayName.get(Program.TEXTURE));
        gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

        gl3.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 2, 0);
    }

    {
        gl3.glDisable(GL_DEPTH_TEST);

        gl3.glViewport(0, 0, windowSize.x, windowSize.y);

        gl3.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        gl3.glUseProgram(programName[Program.SPLASH]);

        gl3.glActiveTexture(GL_TEXTURE0);
        gl3.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.COLORBUFFER));

        gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, 3, 1);
    }

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL3 gl3 = (GL3) gl;

    {
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl3.glMapBufferRange(GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, (float) windowSize.x / windowSize.y, 0.1f, 100.0f);
        Mat4 model = new Mat4(1.0f);

        pointer.asFloatBuffer().put(projection.mul(viewMat4()).mul(model).toFa_());

        gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    // Set the display viewport
    gl3.glViewport(0, 0, windowSize.x, windowSize.y);
    gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

    // Clear color buffer with black
    gl3.glClearBufferfv(GL_COLOR, 0, clearBlackColor);

    // Bind program
    gl3.glUseProgram(programName);
    gl3.glBindVertexArray(vertexArrayName.get(0));

    gl3.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL), 0, Mat4.SIZE);

    // The first orange quad is not written in the framebuffer.
    gl3.glColorMaski(0, false, false, false, false);

    // Beginning of the samples count query
    gl3.glBeginQuery(GL_SAMPLES_PASSED, queryName.get(0));
    {
        // Added a boolean flag to trigger the conditional rendering without commenting anything
        if (toggle) {
            // To test the condional rendering, comment this line, the next draw call won't happen.
            gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
            // End of the samples count query
        }
    }
    gl3.glEndQuery(GL_SAMPLES_PASSED);

    // The second blue quad is written in the framebuffer only if a sample pass the occlusion query.
    gl3.glColorMaski(0, true, true, true, true);

    gl3.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL),
            uniformMaterialOffset, Mat4.SIZE);

    // Draw only if one sample went through the tests, 
    // we don't need to get the query result which prevent the rendering pipeline to stall.
    gl3.glBeginConditionalRender(queryName.get(0), GL_QUERY_WAIT);
    {
        // Clear color buffer with white
        gl3.glClearBufferfv(GL_COLOR, 0, clearWhiteColor);

        gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
    }
    gl3.glEndConditionalRender();

    toggle = !toggle;

    return true;
}
 

@Override
public ByteBuffer connectBuffer(GL3 gl) {
    gl.glBindBuffer(GL3.GL_TEXTURE_BUFFER, getBufferName());
    return gl.glMapBuffer(GL3.GL_TEXTURE_BUFFER, GL3.GL_READ_WRITE);
}
 

@Override
public void display(GLAutoDrawable drawable)
{
    GL3 gl = drawable.getGL().getGL3();

    if (useCUDA)
    {
        // Run the CUDA kernel to generate new vertex positions.
        runCuda(gl);
    }
    else
    {
        // Run the Java method to generate new vertex positions.
        runJava(gl);
    }

    gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Activate the shader program
    gl.glUseProgram(shaderProgramID);
    
    // Set the current projection matrix
    int projectionMatrixLocation = 
        gl.glGetUniformLocation(shaderProgramID, "projectionMatrix");
    gl.glUniformMatrix4fv(
        projectionMatrixLocation, 1, false, 
        simpleInteraction.getProjectionMatrix(), 0);

    // Set the current modelview matrix
    int modelviewMatrixLocation = 
        gl.glGetUniformLocation(shaderProgramID, "modelviewMatrix");
    gl.glUniformMatrix4fv(
        modelviewMatrixLocation, 1, false, 
        simpleInteraction.getModelviewMatrix(), 0);
    
    // Render the VBO
    gl.glBindBuffer(GL_ARRAY_BUFFER, vertexBufferObject);
    gl.glDrawArrays(GL_POINTS, 0, meshWidth * meshHeight);
    
    // Update FPS information in main frame title
    step++;
    long currentTime = System.nanoTime();
    if (prevTimeNS == -1)
    {
        prevTimeNS = currentTime;
    }
    long diff = currentTime - prevTimeNS;
    if (diff > 1e9)
    {
        double fps = (diff / 1e9) * step;
        String t = "JCuda / JOGL interaction sample - ";
        t += useCUDA ? "JCuda" : "Java";
        t += " mode: " + String.format("%.2f", fps) + " FPS";
        frame.setTitle(t);
        prevTimeNS = currentTime;
        step = 0;
    }

    animationState += 0.01;
}
 

@Override
protected boolean render(GL gl) {

    GL3 gl3 = (GL3) gl;

    {
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl3.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, (float) windowSize.x / windowSize.y, 0.1f, 100.0f);
        Mat4 model = new Mat4(1.0f);

        pointer.asFloatBuffer().put(projection.mul(viewMat4()).mul(model).toFa_());

        // Make sure the uniform buffer is uploaded
        gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    {
        gl3.glEnable(GL_DEPTH_TEST);
        gl3.glDepthFunc(GL_LESS);

        gl3.glViewport(0, 0, windowSize.x * framebufferScale, windowSize.y * framebufferScale);

        gl3.glBindFramebuffer(GL_FRAMEBUFFER, framebufferName.get(0));
        //glEnable(GL_FRAMEBUFFER_SRGB);
        float[] depth = {1.0f};
        gl3.glClearBufferfv(GL_DEPTH, 0, depth, 0);
        gl3.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 0.5f, 0.0f, 1.0f}, 0);

        gl3.glUseProgram(programName[Program.TEXTURE]);

        gl3.glActiveTexture(GL_TEXTURE0);
        gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.DIFFUSE));
        gl3.glBindVertexArray(vertexArrayName.get(Program.TEXTURE));
        gl3.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

        gl3.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0);
    }

    {
        gl3.glDisable(GL_DEPTH_TEST);

        gl3.glViewport(0, 0, windowSize.x, windowSize.y);

        gl3.glBindFramebuffer(GL_FRAMEBUFFER, 0);
        //glDisable(GL_FRAMEBUFFER_SRGB);

        gl3.glUseProgram(programName[Program.SPLASH]);

        gl3.glActiveTexture(GL_TEXTURE0);
        gl3.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.COLORBUFFER));

        gl3.glDrawArraysInstanced(GL_TRIANGLES, 0, 3, 1);
    }

    return true;
}
 

private boolean initBuffer(GL3 gl3) {

        IntBuffer uniformBufferOffset = GLBuffers.newDirectIntBuffer(1);
        FloatBuffer positionBuffer = GLBuffers.newDirectFloatBuffer(positionData);

        gl3.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffset);

        gl3.glGenBuffers(Buffer.MAX, bufferName);

        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        gl3.glBufferData(GL_ARRAY_BUFFER, positionSize, positionBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        int uniformTransformBlockSize = Math.max(Mat4.SIZE, uniformBufferOffset.get(0));

        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl3.glBufferData(GL_UNIFORM_BUFFER, uniformTransformBlockSize, null, GL_DYNAMIC_DRAW);
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        uniformMaterialOffset = Math.max(Vec4.SIZE, uniformBufferOffset.get(0));

        gl3.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.MATERIAL));
        gl3.glBufferData(GL_UNIFORM_BUFFER, uniformMaterialOffset * 2, null, GL_STATIC_DRAW);
        {
            ByteBuffer pointer = gl3.glMapBufferRange(GL_UNIFORM_BUFFER, 0, uniformMaterialOffset * 2,
                    GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

            pointer.asFloatBuffer().put(new float[]{0.0f, 0.5f, 1.0f, 1.0f});
            pointer.position(uniformMaterialOffset);
            pointer.asFloatBuffer().put(new float[]{1.0f, 0.5f, 0.0f, 1.0f});
            pointer.rewind();

            gl3.glUnmapBuffer(GL_UNIFORM_BUFFER);
        }
        gl3.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        BufferUtils.destroyDirectBuffer(uniformBufferOffset);
        BufferUtils.destroyDirectBuffer(positionBuffer);

        return checkError(gl3, "initBuffer");
    }
 

private boolean initBuffer(GL3 gl3) {

        FloatBuffer vertexBuffer = GLBuffers.newDirectFloatBuffer(vertexData);

        gl3.glGenBuffers(1, bufferName);

        gl3.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(0));
        gl3.glBufferData(GL_ARRAY_BUFFER, vertexSize, vertexBuffer, GL_STATIC_DRAW);
        gl3.glBindBuffer(GL_ARRAY_BUFFER, 0);

        BufferUtils.destroyDirectBuffer(vertexBuffer);

        return checkError(gl3, "initBuffer");
    }
 

private void initCoordinates(GL3 gl) {

        gl.glGenBuffers(1, coordinatesBufferName, 0);

        coordinatesBufferSize = glyphManager.getGlyphTextureCoordinates().length * BYTES_PER_FLOAT;
        gl.glBindBuffer(GL3.GL_TEXTURE_BUFFER, coordinatesBufferName[0]);
        gl.glBufferData(GL3.GL_TEXTURE_BUFFER, coordinatesBufferSize, null, GL3.GL_DYNAMIC_DRAW);

        gl.glGenTextures(1, coordinatesTextureName, 0);

        gl.glBindTexture(GL3.GL_TEXTURE_BUFFER, coordinatesTextureName[0]);
        gl.glTexBuffer(GL3.GL_TEXTURE_BUFFER, GL3.GL_RGBA32F, coordinatesBufferName[0]);
    }