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/* $XFree86$ */
/**************************************************************************
Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
Cedar Park, Texas.
All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
on the rights to use, copy, modify, merge, publish, distribute, sub
license, and/or sell copies of the Software, and to permit persons to whom
the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice (including the next
paragraph) shall be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
ATI, PRECISION INSIGHT AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
USE OR OTHER DEALINGS IN THE SOFTWARE.
**************************************************************************/
/*
* Authors:
* Kevin E. Martin <kevin@precisioninsight.com>
*
*/
#include "r128_init.h"
#include "r128_mesa.h"
#include "r128_xmesa.h"
#include "r128_context.h"
#include "r128_lock.h"
#include "r128_state.h"
#include "r128_reg.h"
#include "r128_cce.h"
#include "r128_depth.h"
/* FIXME: only handles 16bpp depth buffer for now */
#define DEPTH_DECLS \
r128ContextPtr r128ctx = R128_CONTEXT(ctx); \
r128ScreenPtr r128scrn = r128ctx->r128Screen; \
int xoff = (r128ctx->driDrawable->x + \
r128scrn->depthX); \
int yoff = (r128ctx->driDrawable->y + \
r128scrn->depthY); \
int height = r128ctx->driDrawable->h; \
unsigned char *zbase = (r128scrn->fb + \
xoff * (r128scrn->bpp/8) + \
yoff * r128scrn->fbStride); \
volatile GLdepth *zptr; \
int i; \
(void)i
/* Return a pointer to the offset in the depth buffer at (x,y) */
#define DEPTH_ADDR(base, _x, _y) \
(GLdepth*)(zbase + _x * (r128scrn->bpp/8) + \
(height - _y) * r128scrn->fbStride)
/* Update the depth buffer for a given span. This is only used for
software fallbacks. */
static void r128DDWriteDepthSpan(GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLdepth z[],
const GLubyte mask[])
{
DEPTH_DECLS;
zptr = DEPTH_ADDR(zbase, x, y);
LOCK_HARDWARE(r128ctx);
R128CCE_WAIT_FOR_IDLE(r128ctx);
for (i = 0; i < n; i++, zptr++)
if (mask[i]) {
*zptr = z[i];
}
UNLOCK_HARDWARE(r128ctx);
}
/* Update the depth buffer for a given array of pixels. This is only
used for software fallbacks. */
static void r128DDWriteDepthPixels(GLcontext *ctx,
GLuint n,
const GLint x[],
const GLint y[],
const GLdepth z[],
const GLubyte mask[])
{
DEPTH_DECLS;
LOCK_HARDWARE(r128ctx);
R128CCE_WAIT_FOR_IDLE(r128ctx);
for (i = 0; i < n; i++)
if (mask[i]) {
zptr = DEPTH_ADDR(zbase, x[i], y[i]);
*zptr = z[i];
}
UNLOCK_HARDWARE(r128ctx);
}
/* Return a span in the depth buffer as ints. This is only used for
software fallbacks. */
static void r128DDReadDepthSpan(GLcontext *ctx,
GLuint n,
GLint x, GLint y, GLdepth depth[])
{
DEPTH_DECLS;
zptr = DEPTH_ADDR(zbase, x, y);
LOCK_HARDWARE(r128ctx);
R128CCE_WAIT_FOR_IDLE(r128ctx);
memcpy(depth, (void *)zptr, n*sizeof(*depth));
UNLOCK_HARDWARE(r128ctx);
}
/* Return a span in the depth buffer as floats. This is only used for
software fallbacks. */
static void r128DDReadDepthPixels(GLcontext *ctx,
GLuint n,
const GLint x[], const GLint y[],
GLdepth depth[])
{
DEPTH_DECLS;
LOCK_HARDWARE(r128ctx);
R128CCE_WAIT_FOR_IDLE(r128ctx);
for (i = 0; i < n; i++) {
zptr = DEPTH_ADDR(zbase, x[i], y[i]);
depth[i] = zptr[i];
}
UNLOCK_HARDWARE(r128ctx);
}
/* Initialize the driver's depth functions */
void r128DDInitDepthFuncs(GLcontext *ctx)
{
ctx->Driver.WriteDepthSpan = r128DDWriteDepthSpan;
ctx->Driver.WriteDepthPixels = r128DDWriteDepthPixels;
ctx->Driver.ReadDepthSpan = r128DDReadDepthSpan;
ctx->Driver.ReadDepthPixels = r128DDReadDepthPixels;
}
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