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Lines Matching defs:bf

138    GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign;
191             bf = -bf;
199             bf = -bf;
205             bf = -bf;
240       if (area * bf * swrast->_BackfaceCullSign < 0.0)
246       span.facing = oneOverArea * bf > 0.0F;