/*
* Flat shaded, width=1, non-stippled, color index line.
*/
static void flat_ci_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;
PB_SET_INDEX( ctx, PB, VB->Index[pv] );
/* 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 );
}
/*
* General CI points.
*/
static void general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
{
struct vertex_buffer *VB = ctx->VB;
struct pixel_buffer *PB = ctx->PB;
GLuint i;
GLint isize;
isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
for (i=first;i<=last;i++) {
if (VB->Unclipped[i]) {
GLint x, y, z;
GLint x0, x1, y0, y1;
GLint ix, iy;
x = (GLint) VB->Win[i][0];
y = (GLint) VB->Win[i][1];
z = (GLint) (VB->Win[i][2] + ctx->PointZoffset);
if (isize&1) {
/* odd size */
x0 = x - isize/2;
x1 = x + isize/2;
y0 = y - isize/2;
y1 = y + isize/2;
}
else {
/* even size */
x0 = (GLint) (x + 0.5F) - isize/2;
x1 = x0 + isize-1;
y0 = (GLint) (y + 0.5F) - isize/2;
y1 = y0 + isize-1;
}
PB_SET_INDEX( ctx, PB, VB->Index[i] );
for (iy=y0;iy<=y1;iy++) {
for (ix=x0;ix<=x1;ix++) {
PB_WRITE_PIXEL( PB, ix, iy, z );
}
}
PB_CHECK_FLUSH(ctx,PB)
}
}
/* 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 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);
}
