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authormarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
committermarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
commita0c4815433ccd57322f4f7703ca35e9ccfa59250 (patch)
treef5213802ec12adb86ec3136001c1c29fe5343700 /mesalib/src/mesa/math/m_vector.h
parentc73dc01b6de45612b24dc2dd34fba24d81ebf46c (diff)
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Added MesaLib-7.6
Diffstat (limited to 'mesalib/src/mesa/math/m_vector.h')
-rw-r--r--mesalib/src/mesa/math/m_vector.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/mesalib/src/mesa/math/m_vector.h b/mesalib/src/mesa/math/m_vector.h
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+/*
+ * Mesa 3-D graphics library
+ * Version: 7.3
+ *
+ * Copyright (C) 1999-2008 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.
+ */
+
+/*
+ * New (3.1) transformation code written by Keith Whitwell.
+ */
+
+
+#ifndef _M_VECTOR_H_
+#define _M_VECTOR_H_
+
+#include "main/glheader.h"
+
+
+#define VEC_DIRTY_0 0x1
+#define VEC_DIRTY_1 0x2
+#define VEC_DIRTY_2 0x4
+#define VEC_DIRTY_3 0x8
+#define VEC_MALLOC 0x10 /* storage field points to self-allocated mem*/
+#define VEC_NOT_WRITEABLE 0x40 /* writable elements to hold clipped data */
+#define VEC_BAD_STRIDE 0x100 /* matches tnl's prefered stride */
+
+
+#define VEC_SIZE_1 VEC_DIRTY_0
+#define VEC_SIZE_2 (VEC_DIRTY_0|VEC_DIRTY_1)
+#define VEC_SIZE_3 (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2)
+#define VEC_SIZE_4 (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2|VEC_DIRTY_3)
+
+
+
+/**
+ * Wrap all the information about vectors up in a struct. Has
+ * additional fields compared to the other vectors to help us track of
+ * different vertex sizes, and whether we need to clean columns out
+ * because they contain non-(0,0,0,1) values.
+ *
+ * The start field is used to reserve data for copied vertices at the
+ * end of _mesa_transform_vb, and avoids the need for a multiplication in
+ * the transformation routines.
+ */
+typedef struct {
+ GLfloat (*data)[4]; /**< may be malloc'd or point to client data */
+ GLfloat *start; /**< points somewhere inside of <data> */
+ GLuint count; /**< size of the vector (in elements) */
+ GLuint stride; /**< stride from one element to the next (in bytes) */
+ GLuint size; /**< 2-4 for vertices and 1-4 for texcoords */
+ GLbitfield flags; /**< bitmask of VEC_x flags */
+ void *storage; /**< self-allocated storage */
+ GLuint storage_count; /**< storage size in elements */
+} GLvector4f;
+
+
+extern void _mesa_vector4f_init( GLvector4f *v, GLbitfield flags,
+ GLfloat (*storage)[4] );
+extern void _mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags,
+ GLuint count, GLuint alignment );
+extern void _mesa_vector4f_free( GLvector4f *v );
+extern void _mesa_vector4f_print( const GLvector4f *v, const GLubyte *, GLboolean );
+extern void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint nr, GLuint elt );
+
+
+/**
+ * Given vector <v>, return a pointer (cast to <type *> to the <i>-th element.
+ *
+ * End up doing a lot of slow imuls if not careful.
+ */
+#define VEC_ELT( v, type, i ) \
+ ( (type *) ( ((GLbyte *) ((v)->data)) + (i) * (v)->stride) )
+
+
+#endif