Update glstate.cpp
Fixes the GL blend formula for Subtractive blending
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@ -84,10 +84,9 @@ void GLBlendMode::apply(const BlendType &value)
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break;
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break;
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case BlendSubstraction :
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case BlendSubstraction :
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// FIXME Alpha calculation is untested
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gl.BlendEquation(GL_FUNC_REVERSE_SUBTRACT);
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gl.BlendEquation(GL_FUNC_REVERSE_SUBTRACT);
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gl.BlendFuncSeparate(GL_SRC_ALPHA, GL_ONE,
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gl.BlendFuncSeparate(GL_SRC_ALPHA, GL_ONE,
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GL_ONE, GL_ONE);
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GL_ZERO, GL_ONE);
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break;
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break;
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}
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}
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}
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}
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