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/*
* GLX Hardware Device Driver for Matrox Millenium G200
* Copyright (C) 1999 Wittawat Yamwong
*
* 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
* WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS 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.
*
*
* Wittawat Yamwong <Wittawat.Yamwong@stud.uni-hannover.de>
*/
#ifndef MGATIS_INC
#define MGATIS_INC
#include "types.h"
extern void mgaDDChooseRenderState(GLcontext *ctx);
extern void mgaDDTrifuncInit( void );
/* Todo:
* - multidraw, ...
* - Antialiasing (?)
* - line and polygon stipple
* - select and feedback
* - stencil
* - point parameters
* -
*/
#define MGA_ANTIALIAS_BIT 0 /* ignored for now, no fallback */
#define MGA_FLAT_BIT 0x1
#define MGA_OFFSET_BIT 0x2 /* 3.1 only */
#define MGA_TWOSIDE_BIT 0x4 /* 3.1 only */
#define MGA_NODRAW_BIT 0x8
#define MGA_FALLBACK_BIT 0x10
/* Not in use:
*/
#define MGA_FEEDBACK_BIT 0x20
#define MGA_SELECT_BIT 0x40
#define MGA_POINT_PARAM_BIT 0x80 /* not needed? */
static __inline void mga_draw_triangle( mgaContextPtr mmesa,
mgaVertex *v0,
mgaVertex *v1,
mgaVertex *v2 )
{
mgaUI32 vertsize = mmesa->vertsize;
mgaUI32 *wv = mgaAllocVertexDwords( mmesa, 3 * vertsize );
int j;
for (j = 0 ; j < vertsize ; j++)
wv[j] = v0->ui[j];
wv += vertsize;
for (j = 0 ; j < vertsize ; j++)
wv[j] = v1->ui[j];
wv += vertsize;
for (j = 0 ; j < vertsize ; j++)
wv[j] = v2->ui[j];
}
static __inline void mga_draw_point( mgaContextPtr mmesa,
mgaVertex *tmp, float sz )
{
mgaUI32 vertsize = mmesa->vertsize;
mgaUI32 *wv = mgaAllocVertexDwords( mmesa, 6*vertsize);
int j;
*(float *)&wv[0] = tmp->warp1.x - sz;
*(float *)&wv[1] = tmp->warp1.y - sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp->warp1.x + sz;
*(float *)&wv[1] = tmp->warp1.y - sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp->warp1.x + sz;
*(float *)&wv[1] = tmp->warp1.y + sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp->warp1.x + sz;
*(float *)&wv[1] = tmp->warp1.y + sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp->warp1.x - sz;
*(float *)&wv[1] = tmp->warp1.y + sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp->warp1.x - sz;
*(float *)&wv[1] = tmp->warp1.y - sz;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp->ui[j];
}
static __inline void mga_draw_line( mgaContextPtr mmesa,
const mgaVertex *tmp0,
const mgaVertex *tmp1,
float width )
{
mgaUI32 vertsize = mmesa->vertsize;
mgaUI32 *wv = mgaAllocVertexDwords( mmesa, 6 * vertsize );
float dx, dy, ix, iy;
int j;
dx = tmp0->warp1.x - tmp1->warp1.x;
dy = tmp0->warp1.y - tmp1->warp1.y;
ix = width * .5; iy = 0;
if ((ix<.5) && (ix>0.1)) ix = .5; /* I want to see lines with width
0.5 also */
if (dx * dx > dy * dy) {
iy = ix; ix = 0;
}
*(float *)&wv[0] = tmp0->warp1.x - ix;
*(float *)&wv[1] = tmp0->warp1.y - iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp0->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp1->warp1.x + ix;
*(float *)&wv[1] = tmp1->warp1.y + iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp1->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp0->warp1.x + ix;
*(float *)&wv[1] = tmp0->warp1.y + iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp0->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp0->warp1.x - ix;
*(float *)&wv[1] = tmp0->warp1.y - iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp0->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp1->warp1.x - ix;
*(float *)&wv[1] = tmp1->warp1.y - iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp1->ui[j];
wv += vertsize;
*(float *)&wv[0] = tmp1->warp1.x + ix;
*(float *)&wv[1] = tmp1->warp1.y + iy;
for (j = 2 ; j < vertsize ; j++)
wv[j] = tmp1->ui[j];
wv += vertsize;
}
#endif
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