mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
243 lines
8.2 KiB
C
243 lines
8.2 KiB
C
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 6.2
|
|
*
|
|
* Copyright (C) 1999-2004 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.
|
|
*/
|
|
|
|
|
|
/* KW: a clever asm implementation would nestle integer versions
|
|
* of the outcode calculation underneath the division. Gcc won't
|
|
* 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)
|
|
{
|
|
const GLuint stride = clip_vec->stride;
|
|
const GLfloat *from = (GLfloat *)clip_vec->start;
|
|
const GLuint count = clip_vec->count;
|
|
GLuint c = 0;
|
|
GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start;
|
|
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;
|
|
vProj[i][0] = 0;
|
|
vProj[i][1] = 0;
|
|
vProj[i][2] = 0;
|
|
vProj[i][3] = 1;
|
|
} else {
|
|
GLfloat oow = 1.0F / cw;
|
|
vProj[i][0] = cx * oow;
|
|
vProj[i][1] = cy * 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 = 4;
|
|
proj_vec->count = clip_vec->count;
|
|
return proj_vec;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* \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;
|
|
(void) proj_vec;
|
|
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;
|
|
const GLfloat *from = (GLfloat *)clip_vec->start;
|
|
GLubyte tmpOrMask = *orMask;
|
|
GLubyte tmpAndMask = *andMask;
|
|
GLuint i;
|
|
(void) proj_vec;
|
|
STRIDE_LOOP {
|
|
const GLfloat cx = from[0], cy = from[1], cz = from[2];
|
|
GLubyte mask = 0;
|
|
if (cx > 1.0) mask |= CLIP_RIGHT_BIT;
|
|
else if (cx < -1.0) mask |= CLIP_LEFT_BIT;
|
|
if (cy > 1.0) mask |= CLIP_TOP_BIT;
|
|
else if (cy < -1.0) mask |= CLIP_BOTTOM_BIT;
|
|
if (cz > 1.0) mask |= CLIP_FAR_BIT;
|
|
else if (cz < -1.0) mask |= CLIP_NEAR_BIT;
|
|
clipMask[i] = mask;
|
|
tmpOrMask |= mask;
|
|
tmpAndMask &= mask;
|
|
}
|
|
|
|
*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)
|
|
{
|
|
const GLuint stride = clip_vec->stride;
|
|
const GLuint count = clip_vec->count;
|
|
const GLfloat *from = (GLfloat *)clip_vec->start;
|
|
GLubyte tmpOrMask = *orMask;
|
|
GLubyte tmpAndMask = *andMask;
|
|
GLuint i;
|
|
(void) proj_vec;
|
|
STRIDE_LOOP {
|
|
const GLfloat cx = from[0], cy = from[1];
|
|
GLubyte mask = 0;
|
|
if (cx > 1.0) mask |= CLIP_RIGHT_BIT;
|
|
else if (cx < -1.0) mask |= CLIP_LEFT_BIT;
|
|
if (cy > 1.0) mask |= CLIP_TOP_BIT;
|
|
else if (cy < -1.0) mask |= CLIP_BOTTOM_BIT;
|
|
clipMask[i] = mask;
|
|
tmpOrMask |= mask;
|
|
tmpAndMask &= mask;
|
|
}
|
|
|
|
*orMask = tmpOrMask;
|
|
*andMask = tmpAndMask;
|
|
return clip_vec;
|
|
}
|
|
|
|
|
|
void TAG(init_c_cliptest)( void )
|
|
{
|
|
_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);
|
|
}
|