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/*
* GLX Hardware Device Driver for Intel i810
* Copyright (C) 1999 Keith Whitwell
*
* 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
* KEITH WHITWELL, 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.
*
*
*/
#ifndef I810TIS_INC
#define I810TIS_INC
#include "mesaglx/types.h"
extern void i810DDChooseRenderState(GLcontext *ctx);
extern void i810DDTrifuncInit();
/* extern void i810FinishPrimitive( void ); */
extern void i810NaughtyFinishPrimitive( void );
extern GLuint *i810AllocPrimitiveVerts( int dwords );
/* Todo:
* - multidraw, ...
* - Antialiasing (?)
* - line and polygon stipple
* - select and feedback
* - stencil
* - point parameters
* -
*/
#define I810_ANTIALIAS_BIT 0 /* ignored for now, no fallback */
#define I810_FLAT_BIT 0x1
#define I810_OFFSET_BIT 0x2 /* 3.1 only */
#define I810_TWOSIDE_BIT 0x4 /* 3.1 only */
#define I810_NODRAW_BIT 0x8
#define I810_FALLBACK_BIT 0x10
/* Not in use:
*/
#define I810_FEEDBACK_BIT 0x20
#define I810_SELECT_BIT 0x40
#define I810_POINT_PARAM_BIT 0x80 /* not needed? */
static inline void i810_draw_triangle( i810_vertex *v0,
i810_vertex *v1,
i810_vertex *v2 )
{
#if 0
fprintf(stderr, "i810_draw_triangle( %p, %p, %p )\n", v0, v1, v2);
#endif
#if 0
#define WID 640
#define HI 480
{
GLuint print = 1, draw = 1;
GLfloat area = ((v0->x - v2->x) * (v1->y - v2->y) -
(v0->y - v2->y) * (v1->x - v2->x));
if (v0->x < -.501 || v0->x > WID || v0->y < -.501 || v0->y > HI ||
v1->x < -.501 || v1->x > WID || v1->y < -.501 || v1->y > HI ||
v2->x < -.501 || v2->x > WID || v2->y < -.501 || v2->y > HI) {
fprintf(stderr, "not clipped\n");
print = 1;
}
if (area == 0 && ((v0 == v1) || (v1 == v2))) {
fprintf(stderr, "zero area %p %p %p\n", v0, v1, v2);
draw = 0;
}
if (print) {
fprintf(stderr," v0: %f %f %f %f tex: %f %f\n",
v0->x, v0->y, v0->z, v0->oow, v0->tu0, v0->tv0);
fprintf(stderr," v1: %f %f %f %f tex: %f %f\n",
v1->x, v1->y, v1->z, v1->oow, v1->tu0, v1->tv0);
fprintf(stderr," v2: %f %f %f %f tex: %f %f\n",
v2->x, v2->y, v2->z, v2->oow, v2->tu0, v2->tv0);
return;
}
if (!draw) return;
}
#endif
{
i810_vertex *wv = (i810_vertex *)i810AllocPrimitiveVerts( 3 * 10 );
wv[0] = *v0;
wv[1] = *v1;
wv[2] = *v2;
FINISH_PRIM();
}
}
/* These can go soon, but for the meantime we're using triangles for
* everything.
*/
static inline void i810_draw_point( i810_vertex *tmp, float sz )
{
i810_vertex *wv = (i810_vertex *)i810AllocPrimitiveVerts(6*10);
wv[0] = *tmp;
wv[0].x = tmp->x - sz;
wv[0].y = tmp->y - sz;
wv[1] = *tmp;
wv[1].x = tmp->x + sz;
wv[1].y = tmp->y - sz;
wv[2] = *tmp;
wv[2].x = tmp->x + sz;
wv[2].y = tmp->y + sz;
wv[3] = *tmp;
wv[3].x = tmp->x + sz;
wv[3].y = tmp->y + sz;
wv[4] = *tmp;
wv[4].x = tmp->x - sz;
wv[4].y = tmp->y + sz;
wv[5] = *tmp;
wv[5].x = tmp->x - sz;
wv[5].y = tmp->y - sz;
FINISH_PRIM();
}
static inline void i810_draw_line( i810_vertex *tmp0,
i810_vertex *tmp1,
float width )
{
i810_vertex *wv = (i810_vertex *)i810AllocPrimitiveVerts( 6 * 10 );
float dx, dy, ix, iy;
dx = tmp0->x - tmp1->x;
dy = tmp0->y - tmp1->y;
ix = width * .5; iy = 0;
if (dx * dx > dy * dy) {
iy = ix; ix = 0;
}
#if 0
fprintf(stderr,"tmp0: %f %f %f %f col: %x tex: %f %f\n",
tmp0->x, tmp0->y, tmp0->z, tmp0->oow, *(GLuint*)&tmp0->color, tmp0->tu0, tmp0->tv0);
fprintf(stderr,"tmp1: %f %f %f %f col: %x tex: %f %f\n",
tmp1->x, tmp1->y, tmp1->z, tmp1->oow, *(GLuint*)&tmp1->color, tmp1->tu0, tmp1->tv0);
fprintf(stderr, "ix: %f, iy: %f\n", ix, iy);
#endif
wv[0] = *tmp0;
wv[0].x = tmp0->x - ix;
wv[0].y = tmp0->y - iy;
wv[1] = *tmp1;
wv[1].x = tmp1->x + ix;
wv[1].y = tmp1->y + iy;
wv[2] = *tmp0;
wv[2].x = tmp0->x + ix;
wv[2].y = tmp0->y + iy;
wv[3] = *tmp0;
wv[3].x = tmp0->x - ix;
wv[3].y = tmp0->y - iy;
wv[4] = *tmp1;
wv[4].x = tmp1->x - ix;
wv[4].y = tmp1->y - iy;
wv[5] = *tmp1;
wv[5].x = tmp1->x + ix;
wv[5].y = tmp1->y + iy;
FINISH_PRIM();
}
#endif
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