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mesa: do object-space lighting in ffvertex_prog.c

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Start pulling over some of the optimizations from the fixed function
paths.
This commit is contained in:
Keith Whitwell
2008-05-23 09:10:59 +01:00
parent 7106da1360
commit adc1f88fc9
3 changed files with 88 additions and 39 deletions
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42
src/mesa/shader/prog_statevars.c
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@@ -134,10 +134,6 @@ _mesa_fetch_state(GLcontext *ctx, const gl_state_index state[],
value[3] = 1.0;
}
return;
case STATE_POSITION_NORMALIZED:
COPY_4V(value, ctx->Light.Light[ln].EyePosition);
NORMALIZE_3FV( value );
return;
default:
_mesa_problem(ctx, "Invalid light state in fetch_state");
return;
@@ -431,15 +427,46 @@ _mesa_fetch_state(GLcontext *ctx, const gl_state_index state[],
value[2] = ctx->Fog.Density * ONE_DIV_LN2;
value[3] = ctx->Fog.Density * ONE_DIV_SQRT_LN2;
return;
case STATE_SPOT_DIR_NORMALIZED: {
case STATE_LIGHT_SPOT_DIR_NORMALIZED: {
/* here, state[2] is the light number */
/* pre-normalize spot dir */
const GLuint ln = (GLuint) state[2];
COPY_3V(value, ctx->Light.Light[ln].EyeDirection);
NORMALIZE_3FV(value);
COPY_3V(value, ctx->Light.Light[ln]._NormDirection);
value[3] = ctx->Light.Light[ln]._CosCutoff;
return;
}
case STATE_LIGHT_POSITION: {
const GLuint ln = (GLuint) state[2];
COPY_4V(value, ctx->Light.Light[ln]._Position);
return;
}
case STATE_LIGHT_POSITION_NORMALIZED: {
const GLuint ln = (GLuint) state[2];
COPY_4V(value, ctx->Light.Light[ln]._Position);
NORMALIZE_3FV( value );
return;
}
case STATE_LIGHT_HALF_VECTOR: {
const GLuint ln = (GLuint) state[2];
GLfloat p[3];
/* Compute infinite half angle vector:
* halfVector = normalize(normalize(lightPos) + (0, 0, 1))
* light.EyePosition.w should be 0 for infinite lights.
*/
COPY_3V(p, ctx->Light.Light[ln]._Position);
NORMALIZE_3FV(p);
ADD_3V(value, p, ctx->_EyeZDir);
NORMALIZE_3FV(value);
value[3] = 1.0;
return;
}
case STATE_PT_SCALE:
value[0] = ctx->Pixel.RedScale;
value[1] = ctx->Pixel.GreenScale;
@@ -696,7 +723,6 @@ append_token(char *dst, gl_state_index k)
append(dst, "normalScale");
break;
case STATE_INTERNAL:
case STATE_POSITION_NORMALIZED:
append(dst, "(internal)");
break;
case STATE_PT_SCALE: