-/* $Id: t_vb_normals.c,v 1.6 2001/03/07 05:06:13 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.5
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * 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"),
* 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.
*
- * Author:
- * Keith Whitwell <keithw@valinux.com>
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
*/
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "macros.h"
-#include "mem.h"
-#include "mmath.h"
-#include "mtypes.h"
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/mtypes.h"
#include "math/m_xform.h"
#include "t_pipeline.h"
-
struct normal_stage_data {
- normal_func *NormalTransform;
- GLvector3f normal;
+ normal_func NormalTransform;
+ GLvector4f normal;
};
#define NORMAL_STAGE_DATA(stage) ((struct normal_stage_data *)stage->privatePtr)
-
-
-static GLboolean run_normal_stage( GLcontext *ctx,
- struct gl_pipeline_stage *stage )
+static GLboolean
+run_normal_stage(GLcontext *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;
- ASSERT(store->NormalTransform);
+ if (!store->NormalTransform)
+ return GL_TRUE;
- if (stage->changed_inputs)
- (store->NormalTransform[0])(&ctx->ModelView,
- ctx->_ModelViewInvScale,
- VB->NormalPtr,
- 0,
- 0,
- &store->normal);
+ /* 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->NormalPtr = &store->normal;
+
+ VB->NormalLengthPtr = NULL; /* no longer valid */
return GL_TRUE;
}
-static GLboolean run_validate_normal_stage( GLcontext *ctx,
- struct gl_pipeline_stage *stage)
+/**
+ * Examine current GL state and set the store->NormalTransform pointer
+ * to point to the appropriate normal transformation routine.
+ */
+static void
+validate_normal_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
{
struct normal_stage_data *store = NORMAL_STAGE_DATA(stage);
- ASSERT(ctx->_NeedNormals);
+ 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 (ctx->ModelView.flags & (MAT_FLAG_GENERAL |
- MAT_FLAG_ROTATION |
- MAT_FLAG_GENERAL_3D |
- MAT_FLAG_PERSPECTIVE))
+ 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) {
+ ctx->_ModelViewInvScale != 1.0) {
store->NormalTransform = _mesa_normal_tab[transform | NORM_RESCALE];
}
else {
}
}
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];
}
store->NormalTransform = _mesa_normal_tab[NORM_RESCALE];
}
else {
- store->NormalTransform = 0;
+ store->NormalTransform = NULL;
}
}
-
- if (store->NormalTransform) {
- stage->run = run_normal_stage;
- return stage->run( ctx, stage );
- } else {
- stage->active = GL_FALSE; /* !!! */
- return GL_TRUE;
- }
}
-static void check_normal_transform( GLcontext *ctx,
- struct gl_pipeline_stage *stage )
-{
- stage->active = ctx->_NeedNormals;
- /* Don't clobber the initialize function:
- */
- if (stage->privatePtr)
- stage->run = run_validate_normal_stage;
-}
-
-
-static GLboolean alloc_normal_data( GLcontext *ctx,
- struct gl_pipeline_stage *stage )
+/**
+ * Allocate stage's private data (storage for transformed normals).
+ */
+static GLboolean
+alloc_normal_data(GLcontext *ctx, struct tnl_pipeline_stage *stage)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct normal_stage_data *store;
- stage->privatePtr = MALLOC(sizeof(*store));
+
+ stage->privatePtr = _mesa_malloc(sizeof(*store));
store = NORMAL_STAGE_DATA(stage);
if (!store)
return GL_FALSE;
- _mesa_vector3f_alloc( &store->normal, 0, tnl->vb.Size, 32 );
-
- /* Now run the stage.
- */
- stage->run = run_validate_normal_stage;
- return stage->run( ctx, stage );
+ _mesa_vector4f_alloc( &store->normal, 0, tnl->vb.Size, 32 );
+ return GL_TRUE;
}
-
-static void free_normal_data( struct gl_pipeline_stage *stage )
+/**
+ * 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_vector3f_free( &store->normal );
- FREE( store );
+ _mesa_vector4f_free( &store->normal );
+ _mesa_free( store );
stage->privatePtr = NULL;
}
}
-#define _TNL_NEW_NORMAL_TRANSFORM (_NEW_MODELVIEW| \
- _NEW_TRANSFORM| \
- _MESA_NEW_NEED_NORMALS| \
- _MESA_NEW_NEED_EYE_COORDS)
-
-
-const struct gl_pipeline_stage _tnl_normal_transform_stage =
-{
- "normal transform",
- _TNL_NEW_NORMAL_TRANSFORM, /* re-check */
- _TNL_NEW_NORMAL_TRANSFORM, /* re-run */
- 0,VERT_NORM,VERT_NORM, /* active, inputs, outputs */
- 0, 0, /* changed_inputs, private */
- free_normal_data, /* destructor */
- check_normal_transform, /* check */
- alloc_normal_data /* run -- initially set to alloc */
+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 */
};
-
projects / mesa.git / blobdiff