diff options
Diffstat (limited to 'mesalib/src/mesa/tnl/t_vb_normals.c')
-rw-r--r-- | mesalib/src/mesa/tnl/t_vb_normals.c | 374 |
1 files changed, 187 insertions, 187 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_normals.c b/mesalib/src/mesa/tnl/t_vb_normals.c index 94e8d0ab5..c19b48e51 100644 --- a/mesalib/src/mesa/tnl/t_vb_normals.c +++ b/mesalib/src/mesa/tnl/t_vb_normals.c @@ -1,187 +1,187 @@ -/*
- * Mesa 3-D graphics library
- * Version: 6.5
- *
- * Copyright (C) 1999-2006 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:
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/imports.h"
-#include "main/mtypes.h"
-
-#include "math/m_xform.h"
-
-#include "t_context.h"
-#include "t_pipeline.h"
-
-
-struct normal_stage_data {
- normal_func NormalTransform;
- GLvector4f normal;
-};
-
-#define NORMAL_STAGE_DATA(stage) ((struct normal_stage_data *)stage->privatePtr)
-
-
-static GLboolean
-run_normal_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage)
-{
- struct normal_stage_data *store = NORMAL_STAGE_DATA(stage);
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- const GLfloat *lengths;
-
- if (!store->NormalTransform)
- return GL_TRUE;
-
- /* We can only use the display list's saved normal lengths if we've
- * got a transformation matrix with uniform scaling.
- */
- if (_math_matrix_is_general_scale(ctx->ModelviewMatrixStack.Top))
- lengths = NULL;
- else
- lengths = VB->NormalLengthPtr;
-
- store->NormalTransform( ctx->ModelviewMatrixStack.Top,
- ctx->_ModelViewInvScale,
- VB->AttribPtr[_TNL_ATTRIB_NORMAL], /* input normals */
- lengths,
- &store->normal ); /* resulting normals */
-
- if (VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count > 1) {
- store->normal.stride = 4 * sizeof(GLfloat);
- }
- else {
- store->normal.stride = 0;
- }
-
- VB->AttribPtr[_TNL_ATTRIB_NORMAL] = &store->normal;
-
- VB->NormalLengthPtr = NULL; /* no longer valid */
- return GL_TRUE;
-}
-
-
-/**
- * Examine current GL state and set the store->NormalTransform pointer
- * to point to the appropriate normal transformation routine.
- */
-static void
-validate_normal_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage)
-{
- struct normal_stage_data *store = NORMAL_STAGE_DATA(stage);
-
- if (ctx->VertexProgram._Current ||
- (!ctx->Light.Enabled &&
- !(ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS))) {
- store->NormalTransform = NULL;
- return;
- }
-
- if (ctx->_NeedEyeCoords) {
- /* Eye coordinates are needed, for whatever reasons.
- * Do lighting in eye coordinates, as the GL spec says.
- */
- GLuint transform = NORM_TRANSFORM_NO_ROT;
-
- if (_math_matrix_has_rotation(ctx->ModelviewMatrixStack.Top)) {
- /* need to do full (3x3) matrix transform */
- transform = NORM_TRANSFORM;
- }
-
- if (ctx->Transform.Normalize) {
- store->NormalTransform = _mesa_normal_tab[transform | NORM_NORMALIZE];
- }
- else if (ctx->Transform.RescaleNormals &&
- ctx->_ModelViewInvScale != 1.0) {
- store->NormalTransform = _mesa_normal_tab[transform | NORM_RESCALE];
- }
- else {
- store->NormalTransform = _mesa_normal_tab[transform];
- }
- }
- else {
- /* We don't need eye coordinates.
- * Do lighting in object coordinates. Thus, we don't need to fully
- * transform normal vectors (just leave them in object coordinates)
- * but we still need to do normalization/rescaling if enabled.
- */
- if (ctx->Transform.Normalize) {
- store->NormalTransform = _mesa_normal_tab[NORM_NORMALIZE];
- }
- else if (!ctx->Transform.RescaleNormals &&
- ctx->_ModelViewInvScale != 1.0) {
- store->NormalTransform = _mesa_normal_tab[NORM_RESCALE];
- }
- else {
- store->NormalTransform = NULL;
- }
- }
-}
-
-
-/**
- * Allocate stage's private data (storage for transformed normals).
- */
-static GLboolean
-alloc_normal_data(struct gl_context *ctx, struct tnl_pipeline_stage *stage)
-{
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct normal_stage_data *store;
-
- stage->privatePtr = malloc(sizeof(*store));
- store = NORMAL_STAGE_DATA(stage);
- if (!store)
- return GL_FALSE;
-
- _mesa_vector4f_alloc( &store->normal, 0, tnl->vb.Size, 32 );
- return GL_TRUE;
-}
-
-
-/**
- * Free stage's private data.
- */
-static void
-free_normal_data(struct tnl_pipeline_stage *stage)
-{
- struct normal_stage_data *store = NORMAL_STAGE_DATA(stage);
- if (store) {
- _mesa_vector4f_free( &store->normal );
- free( store );
- stage->privatePtr = NULL;
- }
-}
-
-
-const struct tnl_pipeline_stage _tnl_normal_transform_stage =
-{
- "normal transform", /* name */
- NULL, /* privatePtr */
- alloc_normal_data, /* create */
- free_normal_data, /* destroy */
- validate_normal_stage, /* validate */
- run_normal_stage /* run */
-};
+/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 1999-2006 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: + * Keith Whitwell <keith@tungstengraphics.com> + */ + + +#include "main/glheader.h" +#include "main/colormac.h" +#include "main/macros.h" +#include "main/imports.h" +#include "main/mtypes.h" + +#include "math/m_xform.h" + +#include "t_context.h" +#include "t_pipeline.h" + + +struct normal_stage_data { + normal_func NormalTransform; + GLvector4f normal; +}; + +#define NORMAL_STAGE_DATA(stage) ((struct normal_stage_data *)stage->privatePtr) + + +static GLboolean +run_normal_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage) +{ + struct normal_stage_data *store = NORMAL_STAGE_DATA(stage); + struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; + const GLfloat *lengths; + + if (!store->NormalTransform) + return GL_TRUE; + + /* We can only use the display list's saved normal lengths if we've + * got a transformation matrix with uniform scaling. + */ + if (_math_matrix_is_general_scale(ctx->ModelviewMatrixStack.Top)) + lengths = NULL; + else + lengths = VB->NormalLengthPtr; + + store->NormalTransform( ctx->ModelviewMatrixStack.Top, + ctx->_ModelViewInvScale, + VB->AttribPtr[_TNL_ATTRIB_NORMAL], /* input normals */ + lengths, + &store->normal ); /* resulting normals */ + + if (VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count > 1) { + store->normal.stride = 4 * sizeof(GLfloat); + } + else { + store->normal.stride = 0; + } + + VB->AttribPtr[_TNL_ATTRIB_NORMAL] = &store->normal; + + VB->NormalLengthPtr = NULL; /* no longer valid */ + return GL_TRUE; +} + + +/** + * Examine current GL state and set the store->NormalTransform pointer + * to point to the appropriate normal transformation routine. + */ +static void +validate_normal_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage) +{ + struct normal_stage_data *store = NORMAL_STAGE_DATA(stage); + + if (ctx->VertexProgram._Current || + (!ctx->Light.Enabled && + !(ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS))) { + store->NormalTransform = NULL; + return; + } + + if (ctx->_NeedEyeCoords) { + /* Eye coordinates are needed, for whatever reasons. + * Do lighting in eye coordinates, as the GL spec says. + */ + GLuint transform = NORM_TRANSFORM_NO_ROT; + + if (_math_matrix_has_rotation(ctx->ModelviewMatrixStack.Top)) { + /* need to do full (3x3) matrix transform */ + transform = NORM_TRANSFORM; + } + + if (ctx->Transform.Normalize) { + store->NormalTransform = _mesa_normal_tab[transform | NORM_NORMALIZE]; + } + else if (ctx->Transform.RescaleNormals && + ctx->_ModelViewInvScale != 1.0) { + store->NormalTransform = _mesa_normal_tab[transform | NORM_RESCALE]; + } + else { + store->NormalTransform = _mesa_normal_tab[transform]; + } + } + else { + /* We don't need eye coordinates. + * Do lighting in object coordinates. Thus, we don't need to fully + * transform normal vectors (just leave them in object coordinates) + * but we still need to do normalization/rescaling if enabled. + */ + if (ctx->Transform.Normalize) { + store->NormalTransform = _mesa_normal_tab[NORM_NORMALIZE]; + } + else if (!ctx->Transform.RescaleNormals && + ctx->_ModelViewInvScale != 1.0) { + store->NormalTransform = _mesa_normal_tab[NORM_RESCALE]; + } + else { + store->NormalTransform = NULL; + } + } +} + + +/** + * Allocate stage's private data (storage for transformed normals). + */ +static GLboolean +alloc_normal_data(struct gl_context *ctx, struct tnl_pipeline_stage *stage) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct normal_stage_data *store; + + stage->privatePtr = malloc(sizeof(*store)); + store = NORMAL_STAGE_DATA(stage); + if (!store) + return GL_FALSE; + + _mesa_vector4f_alloc( &store->normal, 0, tnl->vb.Size, 32 ); + return GL_TRUE; +} + + +/** + * Free stage's private data. + */ +static void +free_normal_data(struct tnl_pipeline_stage *stage) +{ + struct normal_stage_data *store = NORMAL_STAGE_DATA(stage); + if (store) { + _mesa_vector4f_free( &store->normal ); + free( store ); + stage->privatePtr = NULL; + } +} + + +const struct tnl_pipeline_stage _tnl_normal_transform_stage = +{ + "normal transform", /* name */ + NULL, /* privatePtr */ + alloc_normal_data, /* create */ + free_normal_data, /* destroy */ + validate_normal_stage, /* validate */ + run_normal_stage /* run */ +}; |