Example usage for org.lwjgl.opengl ARBImaging glBlendEquation

Introduction

In this page you can find the example usage for org.lwjgl.opengl ARBImaging glBlendEquation.

Prototype

public static void glBlendEquation(@NativeType("GLenum") int mode) 

Source Link

Document

Controls the blend equations used for per-fragment blending.

Usage

From source file:com.ardor3d.scene.state.lwjgl.LwjglBlendStateUtil.java

License:Open Source License

protected static void applyBlendEquations(final boolean enabled, final BlendState state,
        final BlendStateRecord record, final ContextCapabilities caps) {
    if (record.isValid()) {
        if (enabled) {
            if (!record.blendEnabled) {
                GL11.glEnable(GL11.GL_BLEND);
                record.blendEnabled = true;
            }// ww  w.j a  va 2 s. c  om
            final int blendEqRGB = getGLEquationValue(state.getBlendEquationRGB(), caps);
            if (caps.isSeparateBlendEquationsSupported()) {
                final int blendEqAlpha = getGLEquationValue(state.getBlendEquationAlpha(), caps);
                if (record.blendEqRGB != blendEqRGB || record.blendEqAlpha != blendEqAlpha) {
                    EXTBlendEquationSeparate.glBlendEquationSeparateEXT(blendEqRGB, blendEqAlpha);
                    record.blendEqRGB = blendEqRGB;
                    record.blendEqAlpha = blendEqAlpha;
                }
            } else if (caps.isBlendEquationSupported()) {
                if (record.blendEqRGB != blendEqRGB) {
                    ARBImaging.glBlendEquation(blendEqRGB);
                    record.blendEqRGB = blendEqRGB;
                }
            }
        } else if (record.blendEnabled) {
            GL11.glDisable(GL11.GL_BLEND);
            record.blendEnabled = false;
        }

    } else {
        if (enabled) {
            GL11.glEnable(GL11.GL_BLEND);
            record.blendEnabled = true;
            final int blendEqRGB = getGLEquationValue(state.getBlendEquationRGB(), caps);
            if (caps.isSeparateBlendEquationsSupported()) {
                final int blendEqAlpha = getGLEquationValue(state.getBlendEquationAlpha(), caps);
                EXTBlendEquationSeparate.glBlendEquationSeparateEXT(blendEqRGB, blendEqAlpha);
                record.blendEqRGB = blendEqRGB;
                record.blendEqAlpha = blendEqAlpha;
            } else if (caps.isBlendEquationSupported()) {
                ARBImaging.glBlendEquation(blendEqRGB);
                record.blendEqRGB = blendEqRGB;
            }
        } else {
            GL11.glDisable(GL11.GL_BLEND);
            record.blendEnabled = false;
        }
    }
}

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