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/* $XFree86: xc/lib/GL/mesa/src/drv/common/depthtmp.h,v 1.4 2000/12/04 22:43:20 dawes Exp $ */
#ifndef DBG
#define DBG 0
#endif
#ifndef HAVE_HW_DEPTH_SPANS
#define HAVE_HW_DEPTH_SPANS 0
#endif
#ifndef HAVE_HW_DEPTH_PIXELS
#define HAVE_HW_DEPTH_PIXELS 0
#endif
static void TAG(WriteDepthSpan)( GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLdepth *depth,
const GLubyte mask[] )
{
HW_LOCK()
{
GLint x1;
GLint n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
#if HAVE_HW_DEPTH_SPANS
(void) x1; (void) n1;
if ( DBG ) fprintf( stderr, "WriteDepthSpan 0..%d (x1 %d)\n",
(int)n, (int)x );
WRITE_DEPTH_SPAN();
#else
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
if ( DBG ) fprintf( stderr, "WriteDepthSpan %d..%d (x1 %d)\n",
(int)i, (int)n1, (int)x1 );
if ( mask ) {
for ( ; i < n1 ; i++, x1++ ) {
if ( mask[i] ) WRITE_DEPTH( x1, y, depth[i] );
}
} else {
for ( ; i < n1 ; i++, x1++ ) {
WRITE_DEPTH( x1, y, depth[i] );
}
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_UNLOCK();
}
static void TAG(WriteDepthPixels)( GLcontext *ctx,
GLuint n,
const GLint x[],
const GLint y[],
const GLdepth depth[],
const GLubyte mask[] )
{
HW_LOCK()
{
GLint i;
LOCAL_DEPTH_VARS;
if ( DBG ) fprintf( stderr, "WriteDepthPixels\n" );
#if HAVE_HW_DEPTH_PIXELS
(void) i;
WRITE_DEPTH_PIXELS();
#else
HW_CLIPLOOP()
{
for ( i = 0 ; i < n ; i++ ) {
if ( mask[i] ) {
const int fy = Y_FLIP( y[i] );
if ( CLIPPIXEL( x[i], fy ) )
WRITE_DEPTH( x[i], fy, depth[i] );
}
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_UNLOCK();
}
/* Read depth spans and pixels
*/
static void TAG(ReadDepthSpan)( GLcontext *ctx,
GLuint n, GLint x, GLint y,
GLdepth depth[] )
{
HW_LOCK()
{
GLint x1, n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
if ( DBG ) fprintf( stderr, "ReadDepthSpan\n" );
#if HAVE_HW_DEPTH_SPANS
(void) x1; (void) n1;
READ_DEPTH_SPAN();
#else
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
for ( ; i < n1 ; i++ )
READ_DEPTH( depth[i], (x1+i), y );
}
HW_ENDCLIPLOOP();
#endif
}
HW_UNLOCK();
}
static void TAG(ReadDepthPixels)( GLcontext *ctx, GLuint n,
const GLint x[], const GLint y[],
GLdepth depth[] )
{
HW_LOCK()
{
GLint i;
LOCAL_DEPTH_VARS;
if ( DBG ) fprintf( stderr, "ReadDepthPixels\n" );
#if HAVE_HW_DEPTH_PIXELS
(void) i;
READ_DEPTH_PIXELS();
#else
HW_CLIPLOOP()
{
for ( i = 0 ; i < n ;i++ ) {
int fy = Y_FLIP( y[i] );
if ( CLIPPIXEL( x[i], fy ) )
READ_DEPTH( depth[i], x[i], fy );
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_UNLOCK();
}
#if HAVE_HW_DEPTH_SPANS
#undef WRITE_DEPTH_SPAN
#undef WRITE_DEPTH_PIXELS
#undef READ_DEPTH_SPAN
#undef READ_DEPTH_PIXELS
#else
#undef WRITE_DEPTH
#undef READ_DEPTH
#endif
#undef TAG
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