/* 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);
}
/*
* Flat-shaded, width=1, non-stippled, rgba line.
*/
static void flat_rgba_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
{
struct vertex_buffer *VB = ctx->VB;
struct pixel_buffer *PB = ctx->PB;
GLint x1 = (GLint) VB->Win[v1][0];
GLint y1 = (GLint) VB->Win[v1][1];
GLint x2 = (GLint) VB->Win[v2][0];
GLint y2 = (GLint) VB->Win[v2][1];
GLint n;
/* Note that color components are ints, not fixed point here */
PB_SET_COLOR( ctx, PB, VB->Color[pv][0], VB->Color[pv][1],
VB->Color[pv][2], VB->Color[pv][3] );
/* compute pixel locations */
n = gl_bresenham( ctx, x1, y1, x2, y2, PB->x+PB->count, PB->y+PB->count );
/* interpolate z values */
if (ctx->Depth.Test) {
GLdepth *zptr = PB->z + PB->count;
GLint z1 = (GLint) (VB->Win[v1][2] + ctx->LineZoffset);
GLint z2 = (GLint) (VB->Win[v2][2] + ctx->LineZoffset);
GL_INTERPOLATE_Z( n, z1, z2, zptr );
}
PB->count += n;
PB_CHECK_FLUSH( ctx, PB );
}
/* 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);
}
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);
}
