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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>
*/
/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgatris.c,v 1.5 2000/09/24 13:51:08 alanh Exp $ */
#include <stdio.h>
#include <math.h>
#include "types.h"
#include "vb.h"
#include "pipeline.h"
#include "mm.h"
#include "mgacontext.h"
#include "mgatris.h"
#include "mgavb.h"
static void mga_null_quad( GLcontext *ctx, GLuint v0,
GLuint v1, GLuint v2, GLuint v3, GLuint pv )
{
}
static void mga_null_triangle( GLcontext *ctx, GLuint v0,
GLuint v1, GLuint v2, GLuint pv )
{
}
static void mga_null_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
{
}
static void mga_null_points( GLcontext *ctx, GLuint first, GLuint last )
{
}
#define MGA_COLOR(to, from) { \
(to)[0] = (from)[2]; \
(to)[1] = (from)[1]; \
(to)[2] = (from)[0]; \
(to)[3] = (from)[3]; \
}
static triangle_func tri_tab[0x10];
static quad_func quad_tab[0x10];
static line_func line_tab[0x10];
static points_func points_tab[0x10];
#define IND (0)
#define TAG(x) x
#include "mgatritmp.h"
#define IND (MGA_FLAT_BIT)
#define TAG(x) x##_flat
#include "mgatritmp.h"
#define IND (MGA_OFFSET_BIT)
#define TAG(x) x##_offset
#include "mgatritmp.h"
#define IND (MGA_OFFSET_BIT|MGA_FLAT_BIT)
#define TAG(x) x##_offset_flat
#include "mgatritmp.h"
#define IND (MGA_TWOSIDE_BIT)
#define TAG(x) x##_twoside
#include "mgatritmp.h"
#define IND (MGA_TWOSIDE_BIT|MGA_FLAT_BIT)
#define TAG(x) x##_twoside_flat
#include "mgatritmp.h"
#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT)
#define TAG(x) x##_twoside_offset
#include "mgatritmp.h"
#define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FLAT_BIT)
#define TAG(x) x##_twoside_offset_flat
#include "mgatritmp.h"
void mgaDDTrifuncInit()
{
int i;
init();
init_flat();
init_offset();
init_offset_flat();
init_twoside();
init_twoside_flat();
init_twoside_offset();
init_twoside_offset_flat();
for (i = 0 ; i < 0x20 ; i++)
if (i & MGA_NODRAW_BIT) {
quad_tab[i] = mga_null_quad;
tri_tab[i] = mga_null_triangle;
line_tab[i] = mga_null_line;
points_tab[i] = mga_null_points;
}
}
#define ALL_FALLBACK (DD_MULTIDRAW | DD_SELECT | DD_FEEDBACK)
#define POINT_FALLBACK (ALL_FALLBACK | DD_POINT_SMOOTH)
#define LINE_FALLBACK (ALL_FALLBACK | DD_LINE_SMOOTH | DD_LINE_STIPPLE)
#define TRI_FALLBACK (ALL_FALLBACK | DD_TRI_SMOOTH | DD_TRI_UNFILLED)
#define ANY_FALLBACK (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK|DD_TRI_STIPPLE)
#define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET|DD_Z_NEVER)
/* Setup the Point, Line, Triangle and Quad functions based on the
current rendering state. Wherever possible, use the hardware to
render the primitive. Otherwise, fallback to software rendering. */
void mgaDDChooseRenderState(GLcontext *ctx)
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLuint flags = ctx->TriangleCaps;
GLuint index = 0;
if (mmesa->Fallback) {
mmesa->renderindex = MGA_FALLBACK_BIT;
return;
}
if (flags & ANY_RASTER_FLAGS) {
if (flags & DD_FLATSHADE) index |= MGA_FLAT_BIT;
if (flags & DD_TRI_LIGHT_TWOSIDE) index |= MGA_TWOSIDE_BIT;
if (flags & DD_TRI_OFFSET) index |= MGA_OFFSET_BIT;
if (flags & DD_Z_NEVER) index |= MGA_NODRAW_BIT;
}
mmesa->PointsFunc = points_tab[index];
mmesa->LineFunc = line_tab[index];
mmesa->TriangleFunc = tri_tab[index];
mmesa->QuadFunc = quad_tab[index];
mmesa->renderindex = index;
mmesa->IndirectTriangles = 0;
if (flags & ANY_FALLBACK) {
if (flags & POINT_FALLBACK) {
mmesa->renderindex |= MGA_FALLBACK_BIT;
mmesa->PointsFunc = 0;
mmesa->IndirectTriangles |= DD_POINT_SW_RASTERIZE;
}
if (flags & LINE_FALLBACK) {
mmesa->renderindex |= MGA_FALLBACK_BIT;
mmesa->LineFunc = 0;
mmesa->IndirectTriangles |= DD_LINE_SW_RASTERIZE;
}
if (flags & TRI_FALLBACK) {
mmesa->renderindex |= MGA_FALLBACK_BIT;
mmesa->TriangleFunc = 0;
mmesa->QuadFunc = 0;
mmesa->IndirectTriangles |= (DD_TRI_SW_RASTERIZE |
DD_QUAD_SW_RASTERIZE);
}
/* Special cases:
*/
if ((flags & DD_TRI_STIPPLE) &&
(ctx->IndirectTriangles & DD_TRI_STIPPLE)) {
mmesa->renderindex |= MGA_FALLBACK_BIT;
mmesa->TriangleFunc = 0;
mmesa->QuadFunc = 0;
mmesa->IndirectTriangles |= (DD_TRI_SW_RASTERIZE |
DD_QUAD_SW_RASTERIZE);
}
}
}
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