t_vertex_generic.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*
 * Copyright 2003 Tungsten Graphics, inc.
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 (including the next
 * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
 * TUNGSTEN GRAPHICS AND/OR THEIR SUPPLIERS 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 <[e-mail]>
 */

#include "glheader.h"
#include "context.h"
#include "colormac.h"
#include "t_context.h"
#include "t_vertex.h"
#include "simple_list.h"



/*
 * These functions take the NDC coordinates pointed to by 'in', apply the
 * NDC->Viewport mapping and store the results at 'v'.
 */

static INLINE void insert_4f_viewport_4( const struct tnl_clipspace_attr *a, GLubyte *v,
                      const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
   out[2] = vp[10] * in[2] + vp[14];
   out[3] = in[3];
}

static INLINE void insert_4f_viewport_3( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
   out[2] = vp[10] * in[2] + vp[14];
   out[3] = 1;
}

static INLINE void insert_4f_viewport_2( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
   out[2] = vp[14];
   out[3] = 1;
}

static INLINE void insert_4f_viewport_1( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[13];
   out[2] = vp[14];
   out[3] = 1;
}

static INLINE void insert_3f_viewport_3( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
   out[2] = vp[10] * in[2] + vp[14];
}

static INLINE void insert_3f_viewport_2( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
   out[2] = vp[10] * in[2] + vp[14];
}

static INLINE void insert_3f_viewport_1( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[13];
   out[2] = vp[14];
}

static INLINE void insert_2f_viewport_2( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[5] * in[1] + vp[13];
}

static INLINE void insert_2f_viewport_1( const struct tnl_clipspace_attr *a, GLubyte *v,
				const GLfloat *in )
{
   GLfloat *out = (GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = vp[0] * in[0] + vp[12];
   out[1] = vp[13];
}


/*
 * These functions do the same as above, except for the viewport mapping.
 */

static INLINE void insert_4f_4( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[2];
   out[3] = in[3];
}

static INLINE void insert_4f_3( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[2];
   out[3] = 1;
}

static INLINE void insert_4f_2( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = 0;
   out[3] = 1;
}

static INLINE void insert_4f_1( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = 0;
   out[2] = 0;
   out[3] = 1;
}

static INLINE void insert_3f_xyw_4( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[3];
}

static INLINE void insert_3f_xyw_err( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   (void) a; (void) v; (void) in;
   _mesa_exit(1);
}

static INLINE void insert_3f_3( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[2];
}

static INLINE void insert_3f_2( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = 0;
}

static INLINE void insert_3f_1( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = 0;
   out[2] = 0;
}


static INLINE void insert_2f_2( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
}

static INLINE void insert_2f_1( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;
   
   out[0] = in[0];
   out[1] = 0;
}

static INLINE void insert_1f_1( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   GLfloat *out = (GLfloat *)(v);
   (void) a;

   out[0] = in[0];
}

static INLINE void insert_null( const struct tnl_clipspace_attr *a, GLubyte *v, const GLfloat *in )
{
   (void) a; (void) v; (void) in;
}

static INLINE void insert_4chan_4f_rgba_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				  const GLfloat *in )
{
   GLchan *c = (GLchan *)v;
   (void) a;
   UNCLAMPED_FLOAT_TO_CHAN(c[0], in[0]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[1], in[1]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[2], in[2]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[3], in[3]);
}

static INLINE void insert_4chan_4f_rgba_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				  const GLfloat *in )
{
   GLchan *c = (GLchan *)v;
   (void) a;
   UNCLAMPED_FLOAT_TO_CHAN(c[0], in[0]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[1], in[1]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[2], in[2]); 
   c[3] = CHAN_MAX;
}

static INLINE void insert_4chan_4f_rgba_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				  const GLfloat *in )
{
   GLchan *c = (GLchan *)v;
   (void) a;
   UNCLAMPED_FLOAT_TO_CHAN(c[0], in[0]); 
   UNCLAMPED_FLOAT_TO_CHAN(c[1], in[1]); 
   c[2] = 0;
   c[3] = CHAN_MAX;
}

static INLINE void insert_4chan_4f_rgba_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				  const GLfloat *in )
{
   GLchan *c = (GLchan *)v;
   (void) a;
   UNCLAMPED_FLOAT_TO_CHAN(c[0], in[0]); 
   c[1] = 0;
   c[2] = 0;
   c[3] = CHAN_MAX;
}

static INLINE void insert_4ub_4f_rgba_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[3]);
}

static INLINE void insert_4ub_4f_rgba_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[2]);
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_rgba_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[2] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_rgba_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   v[1] = 0;
   v[2] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_bgra_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[3]);
}

static INLINE void insert_4ub_4f_bgra_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[2]);
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_bgra_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[0] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_bgra_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   v[1] = 0;
   v[0] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_argb_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[3]);
}

static INLINE void insert_4ub_4f_argb_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[2]);
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_argb_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   v[3] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_argb_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   v[2] = 0x00;
   v[3] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[3]);
}

static INLINE void insert_4ub_4f_abgr_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[2]);
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   v[1] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   v[2] = 0x00;
   v[1] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_3ub_3f_rgb_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[2]);
}

static INLINE void insert_3ub_3f_rgb_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[2] = 0;
}

static INLINE void insert_3ub_3f_rgb_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   v[1] = 0;
   v[2] = 0;
}

static INLINE void insert_3ub_3f_bgr_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[2]);
}

static INLINE void insert_3ub_3f_bgr_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[0] = 0;
}

static INLINE void insert_3ub_3f_bgr_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   v[1] = 0;
   v[0] = 0;
}


static INLINE void insert_1ub_1f_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
			   const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
}


/***********************************************************************
 * Functions to perform the reverse operations to the above, for
 * swrast translation and clip-interpolation.
 * 
 * Currently always extracts a full 4 floats.
 */

static void extract_4f_viewport( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   /* Although included for completeness, the position coordinate is
    * usually handled differently during clipping.
    */
   out[0] = (in[0] - vp[12]) / vp[0];
   out[1] = (in[1] - vp[13]) / vp[5];
   out[2] = (in[2] - vp[14]) / vp[10];
   out[3] = in[3];
}

static void extract_3f_viewport( const struct tnl_clipspace_attr *a, GLfloat *out,