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/* $XFree86: xc/lib/GL/mesa/src/drv/common/stenciltmp.h,v 1.3 2001/03/21 16:14:20 dawes Exp $ */
#ifndef DBG
#define DBG 0
#endif
#ifndef HW_WRITE_LOCK
#define HW_WRITE_LOCK() HW_LOCK()
#endif
#ifndef HW_WRITE_UNLOCK
#define HW_WRITE_UNLOCK() HW_UNLOCK()
#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(WriteStencilSpan)( GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLstencil *stencil,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
GLint x1;
GLint n1;
LOCAL_STENCIL_VARS;
y = Y_FLIP(y);
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN(x,y,n,x1,n1,i);
if (DBG) fprintf(stderr, "WriteStencilSpan %d..%d (x1 %d)\n",
(int)i, (int)n1, (int)x1);
if (mask)
{
for (;n1>0;i++,x1++,n1--)
if (mask[i])
WRITE_STENCIL( x1, y, stencil[i] );
}
else
{
for (;n1>0;i++,x1++,n1--)
WRITE_STENCIL( x1, y, stencil[i] );
}
}
HW_ENDCLIPLOOP();
}
HW_WRITE_UNLOCK();
}
static void TAG(WriteStencilPixels)( GLcontext *ctx,
GLuint n,
const GLint x[],
const GLint y[],
const GLstencil stencil[],
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
GLuint i;
LOCAL_STENCIL_VARS;
if (DBG) fprintf(stderr, "WriteStencilPixels\n");
HW_CLIPLOOP()
{
for (i=0;i<n;i++)
{
if (mask[i]) {
const int fy = Y_FLIP(y[i]);
if (CLIPPIXEL(x[i],fy))
WRITE_STENCIL( x[i], fy, stencil[i] );
}
}
}
HW_ENDCLIPLOOP();
}
HW_WRITE_UNLOCK();
}
/* Read stencil spans and pixels
*/
static void TAG(ReadStencilSpan)( GLcontext *ctx,
GLuint n, GLint x, GLint y,
GLstencil stencil[])
{
HW_READ_LOCK()
{
GLint x1,n1;
LOCAL_STENCIL_VARS;
y = Y_FLIP(y);
if (DBG) fprintf(stderr, "ReadStencilSpan\n");
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN(x,y,n,x1,n1,i);
for (;n1>0;i++,n1--)
READ_STENCIL( stencil[i], (x+i), y );
}
HW_ENDCLIPLOOP();
}
HW_READ_UNLOCK();
}
static void TAG(ReadStencilPixels)( GLcontext *ctx, GLuint n,
const GLint x[], const GLint y[],
GLstencil stencil[] )
{
HW_READ_LOCK()
{
GLuint i;
LOCAL_STENCIL_VARS;
if (DBG) fprintf(stderr, "ReadStencilPixels\n");
HW_CLIPLOOP()
{
for (i=0;i<n;i++) {
int fy = Y_FLIP( y[i] );
if (CLIPPIXEL( x[i], fy ))
READ_STENCIL( stencil[i], x[i], fy );
}
}
HW_ENDCLIPLOOP();
}
HW_READ_UNLOCK();
}
#undef WRITE_STENCIL
#undef READ_STENCIL
#undef TAG
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