-/* $Id: m_clip_tmp.h,v 1.1 2000/11/16 21:05:41 keithw Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 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
* do this, strangely enough, so I only do the divide in
* the case where the cliptest passes. This isn't essential,
* and an asm implementation needn't replicate that behaviour.
+ *
+ * \param clip_vec vector of incoming clip-space coords
+ * \param proj_vec vector of resultant NDC-space projected coords
+ * \param clipMask resulting array of clip flags
+ * \param orMask bitwise-OR of clipMask values
+ * \param andMask bitwise-AND of clipMask values
+ * \return proj_vec pointer
*/
-static GLvector4f * _XFORMAPI TAG(cliptest_points4)( GLvector4f *clip_vec,
- GLvector4f *proj_vec,
- GLubyte clipMask[],
- GLubyte *orMask,
- GLubyte *andMask )
+static GLvector4f * _XFORMAPI TAG(cliptest_points4)( GLvector4f *clip_vec,
+ GLvector4f *proj_vec,
+ GLubyte clipMask[],
+ GLubyte *orMask,
+ GLubyte *andMask )
{
const GLuint stride = clip_vec->stride;
const GLfloat *from = (GLfloat *)clip_vec->start;
const GLfloat cy = from[1];
const GLfloat cz = from[2];
const GLfloat cw = from[3];
-#if defined(macintosh)
+#if defined(macintosh) || defined(__powerpc__)
/* on powerpc cliptest is 17% faster in this way. */
GLuint mask;
mask = (((cw < cx) << CLIP_RIGHT_SHIFT));
c++;
tmpAndMask &= mask;
tmpOrMask |= mask;
- vProj[i][0] = 0; /* no longer required? */
+ vProj[i][0] = 0;
vProj[i][1] = 0;
vProj[i][2] = 0;
vProj[i][3] = 1;
} else {
- GLfloat oow = 1.0F / cw;
- vProj[i][3] = oow;
+ GLfloat oow = 1.0F / cw;
vProj[i][0] = cx * oow;
vProj[i][1] = cy * oow;
- vProj[i][2] = cz * oow;
- }
+ vProj[i][2] = cz * oow;
+ vProj[i][3] = oow;
+ }
}
*orMask = tmpOrMask;
*andMask = (GLubyte) (c < count ? 0 : tmpAndMask);
proj_vec->flags |= VEC_SIZE_4;
- proj_vec->size = 3;
+ proj_vec->size = 4;
proj_vec->count = clip_vec->count;
return proj_vec;
}
-static GLvector4f * _XFORMAPI TAG(cliptest_points3)( GLvector4f *clip_vec,
- GLvector4f *proj_vec,
- GLubyte clipMask[],
- GLubyte *orMask,
- GLubyte *andMask )
+
+
+/*
+ * \param clip_vec vector of incoming clip-space coords
+ * \param proj_vec vector of resultant NDC-space projected coords
+ * \param clipMask resulting array of clip flags
+ * \param orMask bitwise-OR of clipMask values
+ * \param andMask bitwise-AND of clipMask values
+ * \return clip_vec pointer
+ */
+static GLvector4f * _XFORMAPI TAG(cliptest_np_points4)( GLvector4f *clip_vec,
+ GLvector4f *proj_vec,
+ GLubyte clipMask[],
+ GLubyte *orMask,
+ GLubyte *andMask )
+{
+ const GLuint stride = clip_vec->stride;
+ const GLuint count = clip_vec->count;
+ const GLfloat *from = (GLfloat *)clip_vec->start;
+ GLuint c = 0;
+ GLubyte tmpAndMask = *andMask;
+ GLubyte tmpOrMask = *orMask;
+ GLuint i;
+ STRIDE_LOOP {
+ const GLfloat cx = from[0];
+ const GLfloat cy = from[1];
+ const GLfloat cz = from[2];
+ const GLfloat cw = from[3];
+#if defined(macintosh) || defined(__powerpc__)
+ /* on powerpc cliptest is 17% faster in this way. */
+ GLuint mask;
+ mask = (((cw < cx) << CLIP_RIGHT_SHIFT));
+ mask |= (((cw < -cx) << CLIP_LEFT_SHIFT));
+ mask |= (((cw < cy) << CLIP_TOP_SHIFT));
+ mask |= (((cw < -cy) << CLIP_BOTTOM_SHIFT));
+ mask |= (((cw < cz) << CLIP_FAR_SHIFT));
+ mask |= (((cw < -cz) << CLIP_NEAR_SHIFT));
+#else /* !defined(macintosh)) */
+ GLubyte mask = 0;
+ if (-cx + cw < 0) mask |= CLIP_RIGHT_BIT;
+ if ( cx + cw < 0) mask |= CLIP_LEFT_BIT;
+ if (-cy + cw < 0) mask |= CLIP_TOP_BIT;
+ if ( cy + cw < 0) mask |= CLIP_BOTTOM_BIT;
+ if (-cz + cw < 0) mask |= CLIP_FAR_BIT;
+ if ( cz + cw < 0) mask |= CLIP_NEAR_BIT;
+#endif /* defined(macintosh) */
+
+ clipMask[i] = mask;
+ if (mask) {
+ c++;
+ tmpAndMask &= mask;
+ tmpOrMask |= mask;
+ }
+ }
+
+ *orMask = tmpOrMask;
+ *andMask = (GLubyte) (c < count ? 0 : tmpAndMask);
+ return clip_vec;
+}
+
+
+static GLvector4f * _XFORMAPI TAG(cliptest_points3)( GLvector4f *clip_vec,
+ GLvector4f *proj_vec,
+ GLubyte clipMask[],
+ GLubyte *orMask,
+ GLubyte *andMask )
{
const GLuint stride = clip_vec->stride;
const GLuint count = clip_vec->count;
tmpAndMask &= mask;
}
- gl_vector4f_clean_elem(proj_vec, count, 3);
-
*orMask = tmpOrMask;
*andMask = tmpAndMask;
return clip_vec;
}
-static GLvector4f * _XFORMAPI TAG(cliptest_points2)( GLvector4f *clip_vec,
- GLvector4f *proj_vec,
- GLubyte clipMask[],
- GLubyte *orMask,
- GLubyte *andMask )
+
+static GLvector4f * _XFORMAPI TAG(cliptest_points2)( GLvector4f *clip_vec,
+ GLvector4f *proj_vec,
+ GLubyte clipMask[],
+ GLubyte *orMask,
+ GLubyte *andMask )
{
const GLuint stride = clip_vec->stride;
const GLuint count = clip_vec->count;
tmpAndMask &= mask;
}
- gl_vector4f_clean_elem(proj_vec, count, 3);
-
*orMask = tmpOrMask;
*andMask = tmpAndMask;
return clip_vec;
static void TAG(init_c_cliptest)( void )
{
- gl_clip_tab[4] = TAG(cliptest_points4);
- gl_clip_tab[3] = TAG(cliptest_points3);
- gl_clip_tab[2] = TAG(cliptest_points2);
+ _mesa_clip_tab[4] = TAG(cliptest_points4);
+ _mesa_clip_tab[3] = TAG(cliptest_points3);
+ _mesa_clip_tab[2] = TAG(cliptest_points2);
+
+ _mesa_clip_np_tab[4] = TAG(cliptest_np_points4);
+ _mesa_clip_np_tab[3] = TAG(cliptest_points3);
+ _mesa_clip_np_tab[2] = TAG(cliptest_points2);
}
projects / mesa.git / blobdiff