| |
| /* |
| * 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 |
