Java Code Examples for com.jogamp.opengl.GL4#glMapBufferRange()

private boolean initBuffer(GL4 gl4) {

        int[] uniformBufferOffset = {0};
        gl4.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffset, 0);
        uniformBlockSize = Math.max(Mat4.SIZE, uniformBufferOffset[0]);

        gl4.glCreateBuffers(Buffer.MAX, bufferName);

        gl4.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        FloatBuffer vertexBuffer = GLBuffers.newDirectFloatBuffer(vertexData);
        gl4.glBufferStorage(GL_ARRAY_BUFFER, vertexSize, vertexBuffer, 0);

        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl4.glBufferStorage(GL_UNIFORM_BUFFER, uniformBlockSize * 2, null,
                GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT);

        uniformPointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0, uniformBlockSize * 2,
                GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        gl4.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        return true;
    }
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.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);

        projection.mul(viewMat4()).mul(model).toDbb(pointer);

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewportIndexedf(0, 0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1).put(1, 0.5f).put(2, 0).put(3, 1));

    // Bind rendering objects
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindProgramPipeline(pipelineName.get(0));
    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(0));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    gl4.glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

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

        projection.mul(viewMat4()).mul(model).toDbb(pointer);

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewportIndexedf(0, 0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 0.0f).put(1, 0.0f).put(2, 0.0f).put(3, 1.0f));

    gl4.glBindProgramPipeline(pipelineName.get(0));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindVertexArray(vertexArrayName.get(0));
    gl4.glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, bufferName.get(Buffer.VERTEX));

    gl4.glDrawArraysInstancedBaseInstance(GL_TRIANGLES, 0, 6, 1, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {
    GL4 gl4 = (GL4) gl;
    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, 2 * 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 modelA = new Mat4(1.0f).translate(new Vec3(-1.1f, 0.0f, 0.0f));
        Mat4 modelB = new Mat4(1.0f).translate(new Vec3(1.1f, 0.0f, 0.0f));

        pointer.asFloatBuffer().put(projection.mul_(viewMat4()).mul(modelA).toFa_());
        pointer.position(Mat4.SIZE);
        pointer.asFloatBuffer().put(projection.mul(viewMat4()).mul(modelB).toFa_());
        pointer.rewind();

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewport(0, 0, windowSize.x, windowSize.y);

    float[] depth = new float[]{1.0f};
    gl4.glClearBufferfv(GL_DEPTH, 0, depth, 0);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 1.0f, 1.0f, 1.0f}, 0);

    gl4.glUseProgram(programName);
    gl4.glUniformBlockBinding(programName, uniformTransform, Semantic.Uniform.TRANSFORM0);
    gl4.glUniformBlockBinding(programName, uniformMaterial, Semantic.Uniform.MATERIAL);

    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 2);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.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).scale(new Vec3(2.0f));

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

        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewport(0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 0.5f, 0.0f, 1.0f}, 0);

    gl4.glBindProgramPipeline(pipelineName.get(0));

    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(0));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0);

    return true;
}
 

private boolean initBuffer(GL4 gl4) {

        int[] uniformBufferOffset = {0};
        gl4.glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, uniformBufferOffset, 0);

        gl4.glGenBuffers(Buffer.MAX, bufferName);

        gl4.glBindBuffer(GL_ARRAY_BUFFER, bufferName.get(Buffer.VERTEX));
        FloatBuffer positionBuffer = GLBuffers.newDirectFloatBuffer(positionData);
        gl4.glBufferData(GL_ARRAY_BUFFER, positionSize, positionBuffer, GL_STATIC_DRAW);
        BufferUtils.destroyDirectBuffer(positionBuffer);
        gl4.glBindBuffer(GL_ARRAY_BUFFER, 0);

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

        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        gl4.glBufferData(GL_UNIFORM_BUFFER, uniformTransformBlockSize, null, GL_DYNAMIC_DRAW);
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        uniformMaterialOffset = Math.max(4 * Float.BYTES, uniformBufferOffset[0]);

        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.MATERIAL));
        gl4.glBufferData(GL_UNIFORM_BUFFER, uniformMaterialOffset * 2, null, GL_STATIC_DRAW);
        {
            ByteBuffer pointer = gl4.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();

            gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
        }
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, 0);

        return checkError(gl4, "initBuffer");
    }
 

@Override
protected boolean begin(GL gl) {

    GL4 gl4 = (GL4) gl;

    boolean validated = true;
    validated = validated && gl4.isExtensionAvailable("GL_ARB_buffer_storage");
    validated = validated && gl4.isExtensionAvailable("GL_ARB_shader_storage_buffer_object");

    if (validated) {
        validated = initProgram(gl4);
    }
    if (validated) {
        validated = initBuffer(gl4);
    }
    if (validated) {
        validated = initVertexArray(gl4);
    }
    if (validated) {
        validated = initTexture(gl4);
    }
    if (validated) {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        uniformPointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0, Mat4.SIZE, GL_MAP_WRITE_BIT
                | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
    }

    return validated;
}
 

@Override
    protected boolean render(GL gl) {

        GL4 gl4 = (GL4) gl;

        {
            gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
            ByteBuffer pointer = gl4.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_());

            gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
        }

        // Set the display viewport
        gl4.glViewport(0, 0, windowSize.x, windowSize.y);
        gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

        // Clear color buffer with black
        gl4.glClearBufferfv(GL_COLOR, 0, new float[]{0.0f, 0.0f, 0.0f, 1.0f}, 0);

        gl4.glBindProgramPipeline(pipelineName.get(0));
        gl4.glBindVertexArray(vertexArrayName.get(0));
        gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL), 0, Vec4.SIZE);

        // The first orange quad is not written in the framebuffer.
//        gl4.glColorMaski(0, false, false, false, false);

        // Beginning of the samples count query
        gl4.glBeginQuery(GL_ANY_SAMPLES_PASSED_CONSERVATIVE, queryName.get(0));
        {
            if (toggle) {
                // To test the condional rendering, comment this line, the next draw call won't happen.
                gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
            }
        }// End of the samples count query
        gl4.glEndQuery(GL_ANY_SAMPLES_PASSED_CONSERVATIVE);

        // The second blue quad is written in the framebuffer only if a sample pass the occlusion query.
        gl4.glColorMaski(0, true, true, true, true);

        gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL),
                uniformMaterialOffset, Vec4.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.
        gl4.glBeginConditionalRender(queryName.get(0), GL_QUERY_WAIT);
        {
            // Clear color buffer with white
            gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 1.0f, 1.0f, 1.0f}, 0);

//            gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
        }
        gl4.glEndConditionalRender();

        toggle = !toggle;

        return true;
    }
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    // Compute the MVP (Model View Projection matrix)
    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM0));
        ByteBuffer pointer = gl4.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_());

        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    // Set the display viewport
    gl4.glViewport(0, 0, windowSize.x, windowSize.y);

    // Clear color buffer
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 0).put(1, 0).put(2, 0).put(3, 1));

    // First draw, capture the attributes
    // Disable rasterisation, vertices processing only!
    gl4.glEnable(GL_RASTERIZER_DISCARD);

    gl4.glUseProgram(transformProgramName);

    gl4.glBindVertexArray(vertexArrayName.get(VertexArray.TRANSFORM_FEEDBACK));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM0));

    gl4.glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, feedbackName.get(0));
    gl4.glBeginTransformFeedback(GL_TRIANGLES);
    gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
    gl4.glEndTransformFeedback();
    gl4.glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, 0);

    gl4.glDisable(GL_RASTERIZER_DISCARD);

    // Second draw, reuse the captured attributes
    gl4.glUseProgram(feedbackProgramName);

    gl4.glBindVertexArray(vertexArrayName.get(VertexArray.FEEDBACK));
    gl4.glDrawTransformFeedback(GL_TRIANGLES, feedbackName.get(0));

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    int uniformBufferOffset = Math.max(uniformBufferAlignment.get(0), Mat4.SIZE);
    int uniformBufferRange = uniformBufferOffset * 2;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0,
                uniformBufferRange, 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 model0 = new Mat4(1.0f).translate(new Vec3(+1, 0, 0));
        Mat4 model1 = new Mat4(1.0f).translate(new Vec3(-1, 0, 0));

        pointer.position(uniformBufferOffset * 0);
        pointer.asFloatBuffer().put(projection.mul_(viewMat4()).mul(model0).toFa_());
        pointer.position(uniformBufferOffset * 1);
        pointer.asFloatBuffer().put(projection.mul_(viewMat4()).mul(model1).toFa_());
        pointer.rewind();

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, 0);
    }

    gl4.glViewport(0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1).put(1, 1).put(2, 1).put(3, 1));

    gl4.glUseProgram(programName);

    // Attach the buffer to UBO binding point semantic::uniform::MATERIAL
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    // Attach the buffer to UBO binding point semantic::uniform::TRANSFORM0
    gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM), 0,
            Mat4.SIZE);
    gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM1, bufferName.get(Buffer.TRANSFORM),
            uniformBufferOffset, Mat4.SIZE);

    gl4.glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0, 0);
    gl4.glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0, 1);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    float[] depth = {1.0f};
    gl4.glClearBufferfv(GL_DEPTH, 0, depth, 0);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 1.0f, 1.0f, 1.0f}, 0);

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName[Buffer.TRANSFORM]);
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0, Mat4.SIZE * drawDataCount,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, windowSize.x / 3.0f / windowSize.y,
                0.1f, 100.0f);
        Mat4 view = viewMat4();
        Mat4 model = new Mat4(1.0f);

        pointer.asFloatBuffer().put(projection.mul(view, new Mat4()).translate(0.0f, 0.0f, 0.5f).toFa_());
        pointer.position(Mat4.SIZE * 1);
        pointer.asFloatBuffer().put(projection.mul(view, new Mat4()).translate(0.0f, 0.0f, 0.0f).toFa_());
        pointer.position(Mat4.SIZE * 2);
        pointer.asFloatBuffer().put(projection.mul(view, new Mat4()).translate(0.0f, 0.0f, -0.5f).toFa_());
        pointer.rewind();

        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName[Texture.A]);
    gl4.glActiveTexture(GL_TEXTURE1);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName[Texture.B]);
    gl4.glActiveTexture(GL_TEXTURE2);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName[Texture.C]);

    gl4.glBindProgramPipeline(pipelineName[0]);
    gl4.glBindVertexArray(vertexArrayName[0]);
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName[Buffer.TRANSFORM]);
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.INDIRECTION, bufferName[Buffer.VERTEX_INDIRECTION]);

    gl4.glBindBuffer(GL_DRAW_INDIRECT_BUFFER, bufferName[Buffer.INDIRECT]);
    gl4.glBindBuffer(GL_PARAMETER_BUFFER_ARB, bufferName[Buffer.PARAMETER]);

    validate(gl4);

    for (int i = 0; i < drawDataCount; ++i) {

        gl4.glViewportIndexedfv(0, viewport[i].toFA_(), 0);
        gl4.glMultiDrawElementsIndirectCountARB(GL_TRIANGLES, GL_UNSIGNED_SHORT,
                DrawElementsIndirectCommand.SIZE * drawOffset[i], // Offset in the indirect draw buffer
                drawCount[i], // Offset in the paramter buffer
                4, DrawElementsIndirectCommand.SIZE);
    }

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER,
                0, Mat4.SIZE, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        //glm::mat4 Projection = glm::perspectiveFov(glm::pi<float>() * 0.25f, 640.f, 480.f, 0.1f, 100.0f);
        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
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    {
        gl4.glViewport(0, 0, windowSize.x * framebufferScale, windowSize.y * framebufferScale);

        gl4.glBindFramebuffer(GL_FRAMEBUFFER, framebufferName.get(0));
        gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 0.5f, 0.0f, 1.0f}, 0);

        gl4.glUseProgram(programName[Program.TEXTURE]);

        gl4.glActiveTexture(GL_TEXTURE0);
        gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.DIFFUSE));
        gl4.glBindVertexArray(vertexArrayName.get(Program.TEXTURE));
        gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

        gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 2, 0);
    }

    {
        gl4.glViewport(0, 0, windowSize.x, windowSize.y);

        gl4.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        gl4.glUseProgram(programName[Program.SPLASH]);

        gl4.glActiveTexture(GL_TEXTURE0);
        gl4.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.COLORBUFFER));

        gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, 3, 1);
    }

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    diffuseIndex++;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.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_());

        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewport(0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1).put(1, 0.5f).put(2, 0).put(3, 1));

    gl4.glUseProgram(programName);
    gl4.glUniform1ui(uniformDiffuseIndex, (diffuseIndex / 100) % 2);

    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_2D_ARRAY, textureName.get(Texture.RGB));
    gl4.glBindSampler(0, samplerName.get(0));

    gl4.glActiveTexture(GL_TEXTURE1);
    gl4.glBindTexture(GL_TEXTURE_2D_ARRAY, textureName.get(Texture.BGR));
    gl4.glBindSampler(1, samplerName.get(0));

    gl4.glBindVertexArray(vertexArrayName.get(0));
    gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_INT, 0, 2, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.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);

        projection.mul(viewMat4()).toDbb(pointer);

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    {
        gl4.glEnable(GL_DEPTH_TEST);
        gl4.glDepthFunc(GL_LESS);

        gl4.glViewport(0, 0, windowSize.x * framebufferScale, windowSize.y * framebufferScale);

        gl4.glBindFramebuffer(GL_FRAMEBUFFER, framebufferName.get(0));

        // Convert linear clear color to sRGB color space, FramebufferName is a sRGB FBO
        gl4.glEnable(GL_FRAMEBUFFER_SRGB);
        gl4.glClearBufferfv(GL_DEPTH, 0, clearDepth.put(0, 1.0f));
        gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1.0f).put(1, 0.5f).put(2, 0.0f).put(3, 1.0f));

        // 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.
        gl4.glDisable(GL_FRAMEBUFFER_SRGB);
        gl4.glUseProgram(programName[Program.TEXTURE]);

        gl4.glActiveTexture(GL_TEXTURE0);
        gl4.glBindTexture(GL_TEXTURE_2D_ARRAY, textureName.get(Texture.DIFFUSE_RGB));
        gl4.glBindVertexArray(vertexArrayName.get(Program.TEXTURE));
        gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

        gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 2, 0);
    }

    {
        gl4.glDisable(GL_DEPTH_TEST);

        gl4.glViewport(0, 0, windowSize.x, windowSize.y);

        gl4.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        gl4.glUseProgram(programName[Program.SPLASH]);

        gl4.glActiveTexture(GL_TEXTURE0);
        gl4.glBindVertexArray(vertexArrayName.get(Program.SPLASH));
        gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.COLORBUFFER));

        gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, 3, 1);
    }

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

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

        projection.mul(viewMat4()).mul(model).toDbb(pointer);

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    //////////////////////////////
    // Render multisampled texture
    //glBindFramebuffer(GL_FRAMEBUFFER, 0);
    gl4.glBindFramebuffer(GL_FRAMEBUFFER, framebufferName.get(Framebuffer.MULTISAMPLE));
    //glEnable(GL_MULTISAMPLE);
    gl4.glViewportIndexedf(0, 0, 0, FRAMEBUFFER_SIZE.x, FRAMEBUFFER_SIZE.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1).put(1, 0.5f).put(2, 0).put(3, 1));

    gl4.glBindProgramPipeline(pipelineName.get(Pipeline.MULTISAMPLE));
    gl4.glBindVertexArray(vertexArrayName.get(Pipeline.MULTISAMPLE));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

    gl4.glDrawArraysInstancedBaseInstance(GL_LINE_LOOP, 0, vertexData.length, 3, 0);

    //////////////////////////
    // Resolving multisampling
    gl4.glBindFramebuffer(GL_READ_FRAMEBUFFER, framebufferName.get(Framebuffer.MULTISAMPLE));
    gl4.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebufferName.get(Framebuffer.COLOR));
    gl4.glBlitFramebuffer(
            0, 0, FRAMEBUFFER_SIZE.x, FRAMEBUFFER_SIZE.y,
            0, 0, FRAMEBUFFER_SIZE.x, FRAMEBUFFER_SIZE.y,
            GL_COLOR_BUFFER_BIT, GL_NEAREST);
    gl4.glBindFramebuffer(GL_FRAMEBUFFER, 0);

    //////////////////////////////////////
    // Render resolved multisample texture
    gl4.glViewportIndexedf(0, 0, 0, windowSize.x, windowSize.y);
    gl4.glBindFramebuffer(GL_FRAMEBUFFER, 0);
    //glDisable(GL_MULTISAMPLE);
    gl4.glActiveTexture(GL_TEXTURE0);
    //glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, TextureName[texture::MULTISAMPLE]);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.COLOR));
    gl4.glBindVertexArray(vertexArrayName.get(Pipeline.SPLASH));
    gl4.glBindProgramPipeline(pipelineName.get(Pipeline.SPLASH));

    gl4.glDrawArraysInstancedBaseInstance(GL_TRIANGLES, 0, 6, 1, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, Mat4.SIZE,
                GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspectiveFov_((float) Math.PI * 0.25f, 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
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glBindProgramPipeline(pipelineName.get(Program.COMPUTE));
    gl4.glBindImageTexture(Image.POSITION_INPUT, textureName.get(Texture.POSITION_INPUT), 0, false, 0, GL_READ_ONLY,
            GL_RGBA32F);
    gl4.glBindImageTexture(Image.TEXCOORD_INPUT, textureName.get(Texture.TEXCOORD_INPUT), 0, false, 0, GL_READ_ONLY,
            GL_RGBA32F);
    gl4.glBindImageTexture(Image.COLOR_INPUT, textureName.get(Texture.COLOR_INPUT), 0, false, 0, GL_READ_ONLY,
            GL_RGBA32F);
    gl4.glBindImageTexture(Image.POSITION_OUTPUT, textureName.get(Texture.POSITION_OUTPUT), 0, false, 0,
            GL_WRITE_ONLY, GL_RGBA32F);
    gl4.glBindImageTexture(Image.TEXCOORD_OUTPUT, textureName.get(Texture.TEXCOORD_OUTPUT), 0, false, 0,
            GL_WRITE_ONLY, GL_RGBA32F);
    gl4.glBindImageTexture(Image.COLOR_OUTPUT, textureName.get(Texture.COLOR_OUTPUT), 0, false, 0, GL_WRITE_ONLY,
            GL_RGBA32F);

    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glDispatchCompute(vertexCount, 1, 1);

    gl4.glViewportIndexedf(0, 0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 1.0f, 1.0f, 1.0f}, 0);

    gl4.glBindProgramPipeline(pipelineName.get(Program.GRAPHICS));
    gl4.glActiveTexture(GL_TEXTURE0 + Semantic.Sampler.DIFFUSE);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.DIFFUSE));
    gl4.glActiveTexture(GL_TEXTURE0 + Semantic.Sampler.POSITION);
    gl4.glBindTexture(GL_TEXTURE_BUFFER, textureName.get(Texture.POSITION_OUTPUT));
    gl4.glActiveTexture(GL_TEXTURE0 + Semantic.Sampler.TEXCOORD);
    gl4.glBindTexture(GL_TEXTURE_BUFFER, textureName.get(Texture.TEXCOORD_OUTPUT));
    gl4.glActiveTexture(GL_TEXTURE0 + Semantic.Sampler.COLOR);
    gl4.glBindTexture(GL_TEXTURE_BUFFER, textureName.get(Texture.COLOR_OUTPUT));

    gl4.glBindVertexArray(vertexArrayName.get(0));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));

    gl4.glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, elementCount, GL_UNSIGNED_SHORT, 0, 1, 0, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(
                GL_UNIFORM_BUFFER, 0, Transform.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, 1000.0f);
        Mat4 view = viewMat4();
        Mat4 model = new Mat4(1.0f);
        Mat4 mvp = projection.mul(view).mul(model);
        Mat4 mv = view.mul(model);

        Transform transform = new Transform(mvp, mv, new Vec3(0.0f, 0.0f, -cameraDistance()));

        mvp.toDbb(pointer, 0);
        mv.toDbb(pointer, Mat4.SIZE);
        transform.camera.toDbb(pointer, Mat4.SIZE * 2);

        // Make sure the uniform buffer is uploaded
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glViewport(0, 0, windowSize.x, windowSize.y);
    gl4.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1).put(1, 1).put(2, 1).put(3, 1));

    gl4.glUseProgram(programName);
    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, textureName.get(0));
    gl4.glBindSampler(0, samplerName.get(0));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER,
                0, uniformTransformOffset * 2, 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, 10.0f);
        /**
         * A translation of Vec3(0.0f, 0.0f, 0.0f) pushes the square outside the screen, it makes no sense.
         */
        Mat4 model0 = new Mat4(1.0f).translate(new Vec3(0.0f, 0.0f, 0.0f));
        Mat4 model1 = new Mat4(1.0f);

        pointer.position(uniformTransformOffset * 0);
        pointer.asFloatBuffer().put(projection.mul_(viewMat4()).mul(model0).toFa_());
        pointer.position(uniformTransformOffset * 1);
        pointer.asFloatBuffer().put(projection.mul(viewMat4()).mul(model1).toFa_());
        pointer.rewind();

        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    // Set the display viewport
    gl4.glViewport(0, 0, windowSize.x, windowSize.y);

    // Clear color buffer with black
    gl4.glClearBufferfv(GL_COLOR, 0, blackColor);

    gl4.glBindProgramPipeline(pipelineName.get(0));
    gl4.glBindVertexArray(vertexArrayName.get(0));
    gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL), 0,
            Vec4.SIZE);
    gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM), 0,
            Mat4.SIZE);

    // The first orange quad is not written in the framebuffer.
    gl4.glColorMaski(0, false, false, false, false);

    // Beginning of the samples count query
    gl4.glBeginQuery(GL_ANY_SAMPLES_PASSED_CONSERVATIVE, queryName.get(0));
    {
        if (toggle) {
            // To test the condional rendering, comment this line, the next draw call won't happen.
            gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
            // End of the samples count query
        }
    }
    gl4.glEndQuery(GL_ANY_SAMPLES_PASSED_CONSERVATIVE);

    // The second blue quad is written in the framebuffer only if a sample pass the occlusion query.
    gl4.glColorMaski(0, true, true, true, true);

    gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM),
            uniformTransformOffset, 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.
    gl4.glBeginConditionalRender(queryName.get(0), GL_QUERY_WAIT);
    {	// Clear color buffer with white
        gl4.glClearBufferfv(GL_COLOR, 0, whiteColor);

        gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL), 0,
                Vec4.SIZE);
        gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
    }
    gl4.glEndConditionalRender();

    gl4.glBeginConditionalRender(queryName.get(0), GL_QUERY_WAIT_INVERTED);
    {	// Clear color buffer with black
        gl4.glClearBufferfv(GL_COLOR, 0, blackColor);

        gl4.glBindBufferRange(GL_UNIFORM_BUFFER, Semantic.Uniform.MATERIAL, bufferName.get(Buffer.MATERIAL),
                uniformMaterialOffset, Vec4.SIZE);
        gl4.glDrawArraysInstanced(GL_TRIANGLES, 0, vertexCount, 1);
    }
    gl4.glEndConditionalRender();

    toggle = !toggle;

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    {
        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.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, windowSize.x * 0.5f / 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
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    float[] depth = {1.0f};
    gl4.glClearBufferfv(GL_DEPTH, 0, depth, 0);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 0.5f, 0.0f, 1.0f}, 0);

    gl4.glActiveTexture(GL_TEXTURE0 + Sampler.RGB8);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.RGB8));

    gl4.glActiveTexture(GL_TEXTURE0 + Sampler.DXT1);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.DXT1));

    gl4.glBindProgramPipeline(pipelineName.get(0));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindVertexArray(vertexArrayName.get(0));

    gl4.glUseProgram(programName);
    IntBuffer index = GLBuffers.newDirectIntBuffer(new int[]{Sampling.RGB8, Sampling.DXT1});

    gl4.glViewportIndexedf(0, 0, 0, windowSize.x / 2.0f, windowSize.y);
    gl4.glUniformSubroutinesuiv(GL_FRAGMENT_SHADER, 1, index);
    gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_INT, 0, 1, 0);

    gl4.glViewportIndexedf(0, windowSize.x / 2.0f, 0, windowSize.x / 2.0f, windowSize.y);
    gl4.glUniformSubroutinesuiv(GL_FRAGMENT_SHADER, 1, index);
    gl4.glDrawElementsInstancedBaseVertex(GL_TRIANGLES, elementCount, GL_UNSIGNED_INT, 0, 1, 0);

    return true;
}
 

@Override
protected boolean render(GL gl) {

    GL4 gl4 = (GL4) gl;

    float[] depth = {1.0f};
    gl4.glClearBufferfv(GL_DEPTH, 0, depth, 0);
    gl4.glClearBufferfv(GL_COLOR, 0, new float[]{1.0f, 1.0f, 1.0f, 1.0f}, 0);

    {
        int padding = Math.max(Mat4.SIZE, uniformArrayStride.get(0));

        gl4.glBindBuffer(GL_UNIFORM_BUFFER, bufferName.get(Buffer.TRANSFORM));
        ByteBuffer pointer = gl4.glMapBufferRange(GL_UNIFORM_BUFFER, 0, padding * 3, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);

        Mat4 projection = glm.perspective_((float) Math.PI * 0.25f, windowSize.x / 3.0f / windowSize.y, 0.1f, 100.0f);
        Mat4 view = viewMat4();
        Mat4 model = new Mat4(1.0f);

        pointer.position(padding * 0);
        pointer.asFloatBuffer().put(projection.mul(view).translate(new Mat4(1.0f), new Vec3(0.0f, 0.0f, 0.5f)).toFa_());
        // now projection contains projection * view
        pointer.position(padding * 1);
        pointer.asFloatBuffer().put(projection.translate(new Mat4(1.0f), new Vec3(0.0f, 0.0f, 0.0f)).toFa_());
        pointer.position(padding * 2);
        pointer.asFloatBuffer().put(projection.translate(new Mat4(1.0f), new Vec3(0.0f, 0.0f, -0.5f)).toFa_());
        gl4.glUnmapBuffer(GL_UNIFORM_BUFFER);
    }

    gl4.glActiveTexture(GL_TEXTURE0);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.A));
    gl4.glActiveTexture(GL_TEXTURE1);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.B));
    gl4.glActiveTexture(GL_TEXTURE2);
    gl4.glBindTexture(GL_TEXTURE_2D, textureName.get(Texture.C));

    gl4.glBindProgramPipeline(pipelineName.get(0));
    gl4.glBindVertexArray(vertexArrayName.get(0));
    gl4.glBindBufferBase(GL_SHADER_STORAGE_BUFFER, Semantic.Storage.VERTEX, bufferName.get(Buffer.VERTEX));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.TRANSFORM0, bufferName.get(Buffer.TRANSFORM));
    gl4.glBindBufferBase(GL_UNIFORM_BUFFER, Semantic.Uniform.INDIRECTION, bufferName.get(Buffer.VERTEX_INDIRECTION));

    gl4.glBindBuffer(GL_DRAW_INDIRECT_BUFFER, bufferName.get(Buffer.INDIRECT));

    validate(gl4);

    for (int i = 0; i < indirectBufferCount; ++i) {
        gl4.glViewportIndexedfv(0, viewport[i].toFA_(), 0);
        gl4.glMultiDrawElementsIndirect(GL_TRIANGLES, GL_UNSIGNED_SHORT, null, drawCount[i],
                DrawElementsIndirectCommand.SIZE);
    }

    return true;
}