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+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Gareth Hughes <gareth@valinux.com>
+ * Keith Whitwell <keith_whitwell@yahoo.com>
+ */
+
+/* Template for immediate mode normal functions. Optimize for infinite
+ * lights when doing software lighting.
+ */
+
+static void TAG(Normal3f_single)( GLfloat x, GLfloat y, GLfloat z )
+{
+ GET_CURRENT_VERTEX;
+ const struct gl_light *light = ctx->Light.EnabledList.prev;
+ GLfloat n_dot_h, n_dot_VP, spec, sum[3];
+ GLfloat *normal = ctx->Current.Normal;
+ GLfloat scale = 1.0;
+
+ ASSIGN_3V( normal, x, y, z );
+ COPY_3V( sum, BASE_COLOR );
+
+ if ( IND & NORM_RESCALE ) {
+ scale = ctx->_ModelViewInvScale;
+ } else if ( IND & NORM_NORMALIZE ) {
+ scale = LEN_3FV( normal );
+ if ( scale != 0.0 ) scale = 1.0 / scale;
+ }
+
+ n_dot_VP = DOT3( normal, light->_VP_inf_norm ) * scale;
+ if ( n_dot_VP > 0.0F ) {
+ ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] );
+ n_dot_h = DOT3( normal, light->_h_inf_norm ) * scale;
+ if ( n_dot_h > 0.0F ) {
+ GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
+ ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] );
+ }
+ }
+
+#ifdef LIT_COLOR_IS_FLOAT
+ LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f);
+ LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f);
+ LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f);
+#else
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] );
+#endif
+ LIT_COLOR( ACOMP ) = LIT_ALPHA;
+}
+
+static void TAG(Normal3fv_single)( const GLfloat *normal )
+{
+ GET_CURRENT_VERTEX;
+ const struct gl_light *light = ctx->Light.EnabledList.prev;
+ GLfloat n_dot_h, n_dot_VP, spec, sum[3];
+ GLfloat scale = 1.0;
+
+ COPY_3V( ctx->Current.Normal, normal );
+ COPY_3V( sum, BASE_COLOR );
+
+ if ( IND & NORM_RESCALE ) {
+ scale = ctx->_ModelViewInvScale;
+ } else if ( IND & NORM_NORMALIZE ) {
+ scale = LEN_3FV( normal );
+ if ( scale != 0.0 ) scale = 1.0 / scale;
+ }
+
+ n_dot_VP = DOT3( normal, light->_VP_inf_norm ) * scale;
+ if ( n_dot_VP > 0.0F ) {
+ ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] );
+ n_dot_h = DOT3( normal, light->_h_inf_norm ) * scale;
+ if ( n_dot_h > 0.0F ) {
+ GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
+ ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] );
+ }
+ }
+
+#ifdef LIT_COLOR_IS_FLOAT
+ LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f);
+ LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f);
+ LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f);
+#else
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] );
+#endif
+ LIT_COLOR( ACOMP ) = LIT_ALPHA;
+}
+
+
+static void TAG(Normal3f_multi)( GLfloat x, GLfloat y, GLfloat z )
+{
+ GET_CURRENT_VERTEX;
+ struct gl_light *light;
+ GLfloat n_dot_h, n_dot_VP, spec, sum[3], tmp[3];
+ GLfloat *normal;
+
+ ASSIGN_3V( ctx->Current.Normal, x, y, z );
+ COPY_3V( sum, BASE_COLOR );
+
+ if ( IND & NORM_RESCALE ) {
+ normal = tmp;
+ ASSIGN_3V( normal, x, y, z );
+ SELF_SCALE_SCALAR_3V( normal, ctx->_ModelViewInvScale );
+ } else if ( IND & NORM_NORMALIZE ) {
+ normal = tmp;
+ ASSIGN_3V( normal, x, y, z );
+ NORMALIZE_3FV( normal );
+ } else {
+ normal = ctx->Current.Normal;
+ }
+
+ foreach ( light, &ctx->Light.EnabledList ) {
+ n_dot_VP = DOT3( normal, light->_VP_inf_norm );
+ if ( n_dot_VP > 0.0F ) {
+ ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] );
+ n_dot_h = DOT3( normal, light->_h_inf_norm );
+ if ( n_dot_h > 0.0F ) {
+ GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
+ ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] );
+ }
+ }
+ }
+
+#ifdef LIT_COLOR_IS_FLOAT
+ LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f);
+ LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f);
+ LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f);
+#else
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] );
+#endif
+ LIT_COLOR( ACOMP ) = LIT_ALPHA;
+}
+
+static void TAG(Normal3fv_multi)( const GLfloat *n )
+{
+ GET_CURRENT_VERTEX;
+ struct gl_light *light;
+ GLfloat n_dot_h, n_dot_VP, spec, sum[3], tmp[3];
+ GLfloat *normal;
+
+ COPY_3V( ctx->Current.Normal, n );
+ COPY_3V( sum, BASE_COLOR );
+
+ if ( IND & NORM_RESCALE ) {
+ normal = tmp;
+ COPY_3V( normal, n );
+ SELF_SCALE_SCALAR_3V( normal, ctx->_ModelViewInvScale );
+ } else if ( IND & NORM_NORMALIZE ) {
+ normal = tmp;
+ COPY_3V( normal, n );
+ NORMALIZE_3FV( normal );
+ } else {
+ normal = ctx->Current.Normal;
+ }
+
+ foreach ( light, &ctx->Light.EnabledList ) {
+ n_dot_VP = DOT3( normal, light->_VP_inf_norm );
+ if ( n_dot_VP > 0.0F ) {
+ ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] );
+ n_dot_h = DOT3( normal, light->_h_inf_norm );
+ if ( n_dot_h > 0.0F ) {
+ GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
+ ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] );
+ }
+ }
+ }
+
+#ifdef LIT_COLOR_IS_FLOAT
+ LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f);
+ LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f);
+ LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f);
+#else
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] );
+ UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] );
+#endif
+ LIT_COLOR( ACOMP ) = LIT_ALPHA;
+}
+
+
+
+static void TAG(init_norm)( void )
+{
+ norm_tab[IND].normal3f_single = TAG(Normal3f_single);
+ norm_tab[IND].normal3fv_single = TAG(Normal3fv_single);
+ norm_tab[IND].normal3f_multi = TAG(Normal3f_multi);
+ norm_tab[IND].normal3fv_multi = TAG(Normal3fv_multi);
+}
+
+
+
+#ifndef PRESERVE_NORMAL_DEFS
+#undef GET_CURRENT
+#undef GET_CURRENT_VERTEX
+#undef LIT_COLOR
+#undef LIT_COLOR_IS_FLOAT
+#endif
+#undef PRESERVE_NORMAL_DEFS
+#undef IND
+#undef TAG