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/* $XFree86: xc/lib/GL/mesa/src/drv/common/depthtmp.h,v 1.5 2001/03/21 16:14:20 dawes Exp $ */
/*
* Notes:
* 1. These functions plug into the gl_renderbuffer structure.
* 2. The 'values' parameter always points to GLuint values, regardless of
* the actual Z buffer depth.
*/
#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
#ifndef HW_READ_LOCK
#define HW_READ_LOCK() HW_LOCK()
#endif
#ifndef HW_READ_UNLOCK
#define HW_READ_UNLOCK() HW_UNLOCK()
#endif
static void TAG(WriteDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *values,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint *depth = (const GLuint *) values;
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) (mask %p)\n",
(int)i, (int)n1, (int)x1, mask );
if ( mask ) {
for ( ; n1>0 ; i++, x1++, n1-- ) {
if ( mask[i] ) WRITE_DEPTH( x1, y, depth[i] );
}
} else {
for ( ; n1>0 ; i++, x1++, n1-- ) {
WRITE_DEPTH( x1, y, depth[i] );
}
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_WRITE_UNLOCK();
}
#if HAVE_HW_DEPTH_SPANS
/* implement MonoWriteDepthSpan() in terms of WriteDepthSpan() */
static void
TAG(WriteMonoDepthSpan)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *value, const GLubyte mask[] )
{
const GLuint depthVal = *((GLuint *) value);
GLuint depths[MAX_WIDTH];
GLuint i;
for (i = 0; i < n; i++)
depths[i] = depthVal;
TAG(WriteDepthSpan)(ctx, rb, n, x, y, depths, mask);
}
#else
static void TAG(WriteMonoDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *value,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint depth = *((GLuint *) value);
GLint x1;
GLint n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
if ( DBG ) fprintf( stderr, "%s %d..%d (x1 %d) = %u\n",
__FUNCTION__, (int)i, (int)n1, (int)x1, (GLuint)depth );
if ( mask ) {
for ( ; n1>0 ; i++, x1++, n1-- ) {
if ( mask[i] ) WRITE_DEPTH( x1, y, depth );
}
} else {
for ( ; n1>0 ; x1++, n1-- ) {
WRITE_DEPTH( x1, y, depth );
}
}
}
HW_ENDCLIPLOOP();
}
HW_WRITE_UNLOCK();
}
#endif
static void TAG(WriteDepthPixels)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n,
const GLint x[],
const GLint y[],
const void *values,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint *depth = (const GLuint *) values;
GLuint 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_WRITE_UNLOCK();
}
/* Read depth spans and pixels
*/
static void TAG(ReadDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
void *values )
{
HW_READ_LOCK()
{
GLuint *depth = (GLuint *) values;
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 ( ; n1>0 ; i++, n1-- ) {
READ_DEPTH( depth[i], x+i, y );
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_READ_UNLOCK();
}
static void TAG(ReadDepthPixels)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n,
const GLint x[], const GLint y[],
void *values )
{
HW_READ_LOCK()
{
GLuint *depth = (GLuint *) values;
GLuint 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_READ_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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