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lines.c
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2000-01-07
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/* $Id: lines.c,v 1.5.2.1 1999/11/25 16:51:24 keithw Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 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.
*/
#ifdef PC_HEADER
#include "all.h"
#else
#ifndef XFree86Server
#include <assert.h>
#else
#include "GL/xf86glx.h"
#endif
#include "context.h"
#include "depth.h"
#include "feedback.h"
#include "lines.h"
#include "macros.h"
#include "mmath.h"
#include "pb.h"
#include "texstate.h"
#include "types.h"
#include "vb.h"
#endif
void gl_LineWidth( GLcontext *ctx, GLfloat width )
{
if (width<=0.0) {
gl_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
return;
}
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineWidth");
if (ctx->Line.Width != width) {
ctx->Line.Width = width;
ctx->TriangleCaps &= ~DD_LINE_WIDTH;
if (width != 1.0) ctx->TriangleCaps |= DD_LINE_WIDTH;
ctx->NewState |= NEW_RASTER_OPS;
}
}
void gl_LineStipple( GLcontext *ctx, GLint factor, GLushort pattern )
{
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineStipple");
ctx->Line.StippleFactor = CLAMP( factor, 1, 256 );
ctx->Line.StipplePattern = pattern;
ctx->NewState |= NEW_RASTER_OPS;
}
/**********************************************************************/
/***** Rasterization *****/
/**********************************************************************/
/*
* There are 4 pairs (RGBA, CI) of line drawing functions:
* 1. simple: width=1 and no special rasterization functions (fastest)
* 2. flat: width=1, non-stippled, flat-shaded, any raster operations
* 3. smooth: width=1, non-stippled, smooth-shaded, any raster operations
* 4. general: any other kind of line (slowest)
*/
/*
* All line drawing functions have the same arguments:
* v1, v2 - indexes of first and second endpoints into vertex buffer arrays
* pv - provoking vertex: which vertex color/index to use for flat shading.
*/
#if MAX_WIDTH > MAX_HEIGHT
# define MAXPOINTS MAX_WIDTH
#else
# define MAXPOINTS MAX_HEIGHT
#endif
/* Flat, color index line */
static void flat_ci_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
PB_SET_INDEX( ctx, ctx->PB, ctx->VB->IndexPtr->data[pvert] );
count = ctx->PB->count;
#define INTERP_XY 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Flat, color index line with Z interpolation/testing */
static void flat_ci_z_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
PB_SET_INDEX( ctx, ctx->PB, ctx->VB->IndexPtr->data[pvert] );
count = ctx->PB->count;
#define INTERP_XY 1
#define INTERP_Z 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Flat-shaded, RGBA line */
static void flat_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLubyte *color = ctx->VB->ColorPtr->data[pvert];
PB_SET_COLOR( ctx, ctx->PB, color[0], color[1], color[2], color[3] );
count = ctx->PB->count;
#define INTERP_XY 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Flat-shaded, RGBA line with Z interpolation/testing */
static void flat_rgba_z_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLubyte *color = ctx->VB->ColorPtr->data[pvert];
PB_SET_COLOR( ctx, ctx->PB, color[0], color[1], color[2], color[3] );
count = ctx->PB->count;
#define INTERP_XY 1
#define INTERP_Z 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth shaded, color index line */
static void smooth_ci_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLuint *pbi = ctx->PB->i;
(void) pvert;
#define INTERP_XY 1
#define INTERP_INDEX 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbi[count] = I; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth shaded, color index line with Z interpolation/testing */
static void smooth_ci_z_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLuint *pbi = ctx->PB->i;
(void) pvert;
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_INDEX 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbi[count] = I; \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth-shaded, RGBA line */
static void smooth_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLubyte (*pbrgba)[4] = ctx->PB->rgba;
(void) pvert;
#define INTERP_XY 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth-shaded, RGBA line with Z interpolation/testing */
static void smooth_rgba_z_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLubyte (*pbrgba)[4] = ctx->PB->rgba;
(void) pvert;
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++;
#include "linetemp.h"
ctx->PB->count = count;
gl_flush_pb(ctx);
}
#define CHECK_FULL(count) \
if (count >= PB_SIZE-MAX_WIDTH) { \
ctx->PB->count = count; \
gl_flush_pb(ctx); \
count = ctx->PB->count; \
}
/* Smooth shaded, color index, any width, maybe stippled */
static void general_smooth_ci_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLuint *pbi = ctx->PB->i;
(void) pvert;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_INDEX 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbi[count] = I; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled */
if (ctx->Line.Width==2.0F) {
/* special case: unstippled and width=2 */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_INDEX 1
#define XMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X; \
pby[count] = Y; pby[count+1] = Y+1; \
pbz[count] = Z; pbz[count+1] = Z; \
pbi[count] = I; pbi[count+1] = I; \
count += 2; \
CHECK_FULL(count);
#define YMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X+1; \
pby[count] = Y; pby[count+1] = Y; \
pbz[count] = Z; pbz[count+1] = Z; \
pbi[count] = I; pbi[count+1] = I; \
count += 2; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled, any width */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_INDEX 1
#define WIDE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbi[count] = I; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Flat shaded, color index, any width, maybe stippled */
static void general_flat_ci_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
PB_SET_INDEX( ctx, ctx->PB, ctx->VB->IndexPtr->data[pvert] );
count = ctx->PB->count;
if (ctx->Line.StippleFlag) {
/* stippled, any width */
#define INTERP_XY 1
#define INTERP_Z 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled */
if (ctx->Line.Width==2.0F) {
/* special case: unstippled and width=2 */
#define INTERP_XY 1
#define INTERP_Z 1
#define XMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X; \
pby[count] = Y; pby[count+1] = Y+1; \
pbz[count] = Z; pbz[count+1] = Z; \
count += 2; \
CHECK_FULL(count);
#define YMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X+1; \
pby[count] = Y; pby[count+1] = Y; \
pbz[count] = Z; pbz[count+1] = Z; \
count += 2; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled, any width */
#define INTERP_XY 1
#define INTERP_Z 1
#define WIDE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
static void general_smooth_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert)
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLubyte (*pbrgba)[4] = ctx->PB->rgba;
(void) pvert;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled */
if (ctx->Line.Width==2.0F) {
/* special case: unstippled and width=2 */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define XMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X; \
pby[count] = Y; pby[count+1] = Y+1; \
pbz[count] = Z; pbz[count+1] = Z; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
pbrgba[count+1][RCOMP] = FixedToInt(r0); \
pbrgba[count+1][GCOMP] = FixedToInt(g0); \
pbrgba[count+1][BCOMP] = FixedToInt(b0); \
pbrgba[count+1][ACOMP] = FixedToInt(a0); \
count += 2; \
CHECK_FULL(count);
#define YMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X+1; \
pby[count] = Y; pby[count+1] = Y; \
pbz[count] = Z; pbz[count+1] = Z; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
pbrgba[count+1][RCOMP] = FixedToInt(r0); \
pbrgba[count+1][GCOMP] = FixedToInt(g0); \
pbrgba[count+1][BCOMP] = FixedToInt(b0); \
pbrgba[count+1][ACOMP] = FixedToInt(a0); \
count += 2; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled, any width */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define WIDE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
static void general_flat_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLubyte *color = ctx->VB->ColorPtr->data[pvert];
PB_SET_COLOR( ctx, ctx->PB, color[0], color[1], color[2], color[3] );
count = ctx->PB->count;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled */
if (ctx->Line.Width==2.0F) {
/* special case: unstippled and width=2 */
#define INTERP_XY 1
#define INTERP_Z 1
#define XMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X; \
pby[count] = Y; pby[count+1] = Y+1; \
pbz[count] = Z; pbz[count+1] = Z; \
count += 2; \
CHECK_FULL(count);
#define YMAJOR_PLOT(X,Y) \
pbx[count] = X; pbx[count+1] = X+1; \
pby[count] = Y; pby[count+1] = Y; \
pbz[count] = Z; pbz[count+1] = Z; \
count += 2; \
CHECK_FULL(count);
#include "linetemp.h"
}
else {
/* unstippled, any width */
#define INTERP_XY 1
#define INTERP_Z 1
#define WIDE 1
#define PLOT(X,Y) \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
count++; \
CHECK_FULL(count);
#include "linetemp.h"
}
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Flat-shaded, textured, any width, maybe stippled */
static void flat_textured_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pv )
{
GLint count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLfloat *pbs = ctx->PB->s[0];
GLfloat *pbt = ctx->PB->t[0];
GLfloat *pbu = ctx->PB->u[0];
GLubyte *color = ctx->VB->ColorPtr->data[pv];
PB_SET_COLOR( ctx, ctx->PB, color[0], color[1], color[2], color[3] );
count = ctx->PB->count;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_STUV0 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
else {
/* unstippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_STUV0 1
#define WIDE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth-shaded, textured, any width, maybe stippled */
static void smooth_textured_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLfloat *pbs = ctx->PB->s[0];
GLfloat *pbt = ctx->PB->t[0];
GLfloat *pbu = ctx->PB->u[0];
GLubyte (*pbrgba)[4] = ctx->PB->rgba;
(void) pvert;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define INTERP_STUV0 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
else {
/* unstippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_ALPHA 1
#define INTERP_STUV0 1
#define WIDE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/* Smooth-shaded, multitextured, any width, maybe stippled, separate specular
* color interpolation.
*/
static void smooth_multitextured_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
GLint count = ctx->PB->count;
GLint *pbx = ctx->PB->x;
GLint *pby = ctx->PB->y;
GLdepth *pbz = ctx->PB->z;
GLfloat *pbs = ctx->PB->s[0];
GLfloat *pbt = ctx->PB->t[0];
GLfloat *pbu = ctx->PB->u[0];
GLfloat *pbs1 = ctx->PB->s[1];
GLfloat *pbt1 = ctx->PB->t[1];
GLfloat *pbu1 = ctx->PB->u[1];
GLubyte (*pbrgba)[4] = ctx->PB->rgba;
GLubyte (*pbspec)[3] = ctx->PB->spec;
(void) pvert;
if (ctx->Line.StippleFlag) {
/* stippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_SPEC 1
#define INTERP_ALPHA 1
#define INTERP_STUV0 1
#define INTERP_STUV1 1
#define WIDE 1
#define STIPPLE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
pbs1[count] = s1; \
pbt1[count] = t1; \
pbu1[count] = u1; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
pbspec[count][RCOMP] = FixedToInt(sr0); \
pbspec[count][GCOMP] = FixedToInt(sg0); \
pbspec[count][BCOMP] = FixedToInt(sb0); \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
else {
/* unstippled */
#define INTERP_XY 1
#define INTERP_Z 1
#define INTERP_RGB 1
#define INTERP_SPEC 1
#define INTERP_ALPHA 1
#define INTERP_STUV0 1
#define INTERP_STUV1 1
#define WIDE 1
#define PLOT(X,Y) \
{ \
pbx[count] = X; \
pby[count] = Y; \
pbz[count] = Z; \
pbs[count] = s; \
pbt[count] = t; \
pbu[count] = u; \
pbs1[count] = s1; \
pbt1[count] = t1; \
pbu1[count] = u1; \
pbrgba[count][RCOMP] = FixedToInt(r0); \
pbrgba[count][GCOMP] = FixedToInt(g0); \
pbrgba[count][BCOMP] = FixedToInt(b0); \
pbrgba[count][ACOMP] = FixedToInt(a0); \
pbspec[count][RCOMP] = FixedToInt(sr0); \
pbspec[count][GCOMP] = FixedToInt(sg0); \
pbspec[count][BCOMP] = FixedToInt(sb0); \
count++; \
CHECK_FULL(count); \
}
#include "linetemp.h"
}
ctx->PB->count = count;
gl_flush_pb(ctx);
}
/*
* Antialiased RGBA line
*
* This AA line function isn't terribly efficient but it's pretty
* straight-forward to understand. Also, it doesn't exactly conform
* to the specification.
*/
static void aa_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
#define INTERP_RGBA 1
#define PLOT(x, y) { PB_WRITE_RGBA_PIXEL( pb, (x), (y), z, red, green, blue, coverage ); }
#include "lnaatemp.h"
}
/*
* Antialiased Textured RGBA line
*
* This AA line function isn't terribly efficient but it's pretty
* straight-forward to understand. Also, it doesn't exactly conform
* to the specification.
*/
static void aa_tex_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
#define INTERP_RGBA 1
#define INTERP_STUV0 1
#define PLOT(x, y) \
{ \
PB_WRITE_TEX_PIXEL( pb, (x), (y), z, red, green, blue, coverage, \
s, t, u ); \
}
#include "lnaatemp.h"
}
/*
* Antialiased Multitextured RGBA line
*
* This AA line function isn't terribly efficient but it's pretty
* straight-forward to understand. Also, it doesn't exactly conform
* to the specification.
*/
static void aa_multitex_rgba_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
#define INTERP_RGBA 1
#define INTERP_SPEC 1
#define INTERP_STUV0 1
#define INTERP_STUV1 1
#define PLOT(x, y) \
{ \
PB_WRITE_MULTITEX_SPEC_PIXEL( pb, (x), (y), z, \
red, green, blue, coverage, specRed, specGreen, specBlue, \
s, t, u, s1, t1, u1 ); \
}
#include "lnaatemp.h"
}
/*
* Antialiased CI line. Same comments for RGBA antialiased lines apply.
*/
static void aa_ci_line( GLcontext *ctx,
GLuint vert0, GLuint vert1, GLuint pvert )
{
#define INTERP_INDEX 1
#define PLOT(x, y) \
{ \
PB_WRITE_CI_PIXEL( pb, (x), (y), z, index + coverage ); \
}
#include "lnaatemp.h"
}
/*
* Null rasterizer for measuring transformation speed.
*/
static void null_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
{
(void) ctx;
(void) v1;
(void) v2;
(void) pv;
}
/*
* Determine which line drawing function to use given the current
* rendering context.
*/
void gl_set_line_function( GLcontext *ctx )
{
GLboolean rgbmode = ctx->Visual->RGBAflag;
/* TODO: antialiased lines */
if (ctx->RenderMode==GL_RENDER) {
if (ctx->NoRaster) {
ctx->Driver.LineFunc = null_line;
return;
}
if (ctx->Driver.LineFunc) {
/* Device driver will draw lines. */
return;
}
if (ctx->Line.SmoothFlag) {
/* antialiased lines */
if (rgbmode) {
if (ctx->Texture.ReallyEnabled) {
if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D
|| ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR)
/* Multitextured! */
ctx->Driver.LineFunc = aa_multitex_rgba_line;
else
ctx->Driver.LineFunc = aa_tex_rgba_line;
} else {
ctx->Driver.LineFunc = aa_rgba_line;
}
}
else {
ctx->Driver.LineFunc = aa_ci_line;
}
}
else if (ctx->Texture.ReallyEnabled) {
if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D
|| ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) {
/* multi-texture and/or separate specular color */
ctx->Driver.LineFunc = smooth_multitextured_line;
}
else {
if (ctx->Light.ShadeModel==GL_SMOOTH) {
ctx->Driver.LineFunc = smooth_textured_line;
}
else {
ctx->Driver.LineFunc = flat_textured_line;
}
}
}
else if (ctx->Line.Width!=1.0 || ctx->Line.StippleFlag
|| ctx->Line.SmoothFlag) {
if (ctx->Light.ShadeModel==GL_SMOOTH) {
if (rgbmode)
ctx->Driver.LineFunc = general_smooth_rgba_line;
else
ctx->Driver.LineFunc = general_smooth_ci_line;
}
else {
if (rgbmode)
ctx->Driver.LineFunc = general_flat_rgba_line;
else
ctx->Driver.LineFunc = general_flat_ci_line;
}
}
else {
if (ctx->Light.ShadeModel==GL_SMOOTH) {
/* Width==1, non-stippled, smooth-shaded */
if (ctx->Depth.Test || ctx->FogMode == FOG_FRAGMENT) {
if (rgbmode)
ctx->Driver.LineFunc = smooth_rgba_z_line;
else
ctx->Driver.LineFunc = smooth_ci_z_line;
}
else {
if (rgbmode)
ctx->Driver.LineFunc = smooth_rgba_line;
else
ctx->Driver.LineFunc = smooth_ci_line;
}
}
else {
/* Width==1, non-stippled, flat-shaded */
if (ctx->Depth.Test || ctx->FogMode == FOG_FRAGMENT) {
if (rgbmode)
ctx->Driver.LineFunc = flat_rgba_z_line;
else
ctx->Driver.LineFunc = flat_ci_z_line;
}
else {
if (rgbmode)
ctx->Driver.LineFunc = flat_rgba_line;
else
ctx->Driver.LineFunc = flat_ci_line;
}
}
}
}
else if (ctx->RenderMode==GL_FEEDBACK) {
ctx->Driver.LineFunc = gl_feedback_line;
}
else {
/* GL_SELECT mode */
ctx->Driver.LineFunc = gl_select_line;
}
}