diff options
Diffstat (limited to 'src/mesa/drivers/dri/r200/r200_state.c')
| -rw-r--r-- | src/mesa/drivers/dri/r200/r200_state.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r200/r200_state.c b/src/mesa/drivers/dri/r200/r200_state.c index 37da564986..7ea45f3d78 100644 --- a/src/mesa/drivers/dri/r200/r200_state.c +++ b/src/mesa/drivers/dri/r200/r200_state.c @@ -1104,6 +1104,10 @@ static void r200Lightfv( GLcontext *ctx, GLenum light, case GL_CONSTANT_ATTENUATION: R200_STATECHANGE(rmesa, lit[p]); fcmd[LIT_ATTEN_CONST] = params[0]; + if ( params[0] == 0.0 ) + fcmd[LIT_ATTEN_CONST_INV] = FLT_MAX; + else + fcmd[LIT_ATTEN_CONST_INV] = 1.0 / params[0]; break; case GL_LINEAR_ATTENUATION: R200_STATECHANGE(rmesa, lit[p]); @@ -1117,6 +1121,41 @@ static void r200Lightfv( GLcontext *ctx, GLenum light, return; } + /* Set RANGE_ATTEN only when needed */ + switch (pname) { + case GL_POSITION: + case GL_CONSTANT_ATTENUATION: + case GL_LINEAR_ATTENUATION: + case GL_QUADRATIC_ATTENUATION: { + GLuint *icmd = (GLuint *)R200_DB_STATE( tcl ); + GLuint idx = TCL_PER_LIGHT_CTL_0 + p/2; + GLuint atten_flag = ( p&1 ) ? R200_LIGHT_1_ENABLE_RANGE_ATTEN + : R200_LIGHT_0_ENABLE_RANGE_ATTEN; + GLuint atten_const_flag = ( p&1 ) ? R200_LIGHT_1_CONSTANT_RANGE_ATTEN + : R200_LIGHT_0_CONSTANT_RANGE_ATTEN; + + if ( l->EyePosition[3] == 0.0F || + ( ( fcmd[LIT_ATTEN_CONST] == 0.0 || fcmd[LIT_ATTEN_CONST] == 1.0 ) && + fcmd[LIT_ATTEN_QUADRATIC] == 0.0 && fcmd[LIT_ATTEN_LINEAR] == 0.0 ) ) { + /* Disable attenuation */ + icmd[idx] &= ~atten_flag; + } else { + if ( fcmd[LIT_ATTEN_QUADRATIC] == 0.0 && fcmd[LIT_ATTEN_LINEAR] == 0.0 ) { + /* Enable only constant portion of attenuation calculation */ + icmd[idx] |= ( atten_flag | atten_const_flag ); + } else { + /* Enable full attenuation calculation */ + icmd[idx] &= ~atten_const_flag; + icmd[idx] |= atten_flag; + } + } + + R200_DB_STATECHANGE( rmesa, &rmesa->hw.tcl ); + break; + } + default: + break; + } } |