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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
*
**************************************************************************/
#include "util/u_pack_color.h"
#include "pipe/p_state.h"
#include "brw_batchbuffer.h"
#include "brw_screen.h"
#include "brw_context.h"
#define MASK16 0xffff
#define MASK24 0xffffff
/**
* Use blitting to clear the renderbuffers named by 'flags'.
* Note: we can't use the ctx->DrawBuffer->_ColorDrawBufferIndexes field
* since that might include software renderbuffers or renderbuffers
* which we're clearing with triangles.
* \param mask bitmask of BUFFER_BIT_* values indicating buffers to clear
*/
static enum pipe_error
try_clear( struct brw_context *brw,
struct brw_surface *surface,
unsigned value )
{
uint32_t BR13, CMD;
int x1 = 0;
int y1 = 0;
int x2 = surface->base.width;
int y2 = surface->base.height;
int pitch = surface->pitch;
int cpp = surface->cpp;
if (x2 == 0 || y2 == 0)
return 0;
debug_printf("%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
__FUNCTION__,
(void *)surface->bo, pitch * cpp,
surface->base.offset,
x1, y1, x2 - x1, y2 - y1);
BR13 = 0xf0 << 16;
CMD = XY_COLOR_BLT_CMD | XY_BLT_WRITE_RGB | XY_BLT_WRITE_ALPHA;
/* Setup the blit command */
if (cpp == 4) {
BR13 |= BR13_8888;
CMD |= XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
}
else {
assert(cpp == 2);
BR13 |= BR13_565;
}
/* XXX: nasty hack for clearing depth buffers
*/
if (surface->tiling == BRW_TILING_Y) {
x2 = pitch;
}
if (surface->tiling == BRW_TILING_X) {
CMD |= XY_DST_TILED;
pitch /= 4;
}
BR13 |= (pitch * cpp);
BEGIN_BATCH(6, 0);
OUT_BATCH(CMD);
OUT_BATCH(BR13);
OUT_BATCH((y1 << 16) | x1);
OUT_BATCH((y2 << 16) | x2);
OUT_RELOC(surface->bo,
BRW_USAGE_BLIT_DEST,
surface->base.offset);
OUT_BATCH(value);
ADVANCE_BATCH();
return 0;
}
static void color_clear(struct brw_context *brw,
struct brw_surface *bsurface,
const float *rgba )
{
enum pipe_error ret;
union util_color value;
util_pack_color( rgba, bsurface->base.format, &value );
if (bsurface->cpp == 2)
value.ui |= value.ui << 16;
ret = try_clear( brw, bsurface, value.ui );
if (ret != 0) {
brw_context_flush( brw );
ret = try_clear( brw, bsurface, value.ui );
assert( ret == 0 );
}
}
static void zstencil_clear(struct brw_context *brw,
struct brw_surface *bsurface,
double depth,
unsigned stencil )
{
enum pipe_error ret;
unsigned value;
switch (bsurface->base.format) {
case PIPE_FORMAT_Z24X8_UNORM:
case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
value = ((unsigned)(depth * MASK24) & MASK24);
break;
case PIPE_FORMAT_Z16_UNORM:
value = ((unsigned)(depth * MASK16) & MASK16);
break;
default:
assert(0);
return;
}
switch (bsurface->base.format) {
case PIPE_FORMAT_Z24X8_UNORM:
case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
value = value | (stencil << 24);
break;
case PIPE_FORMAT_Z16_UNORM:
value = value | (value << 16);
break;
default:
break;
}
ret = try_clear( brw, bsurface, value );
if (ret != 0) {
brw_context_flush( brw );
ret = try_clear( brw, bsurface, value );
assert( ret == 0 );
}
}
/**
* Clear the given surface to the specified value.
* No masking, no scissor (clear entire buffer).
*/
static void brw_clear(struct pipe_context *pipe,
unsigned buffers,
const float *rgba,
double depth,
unsigned stencil)
{
struct brw_context *brw = brw_context( pipe );
int i;
if (buffers & PIPE_CLEAR_COLOR) {
for (i = 0; i < brw->curr.fb.nr_cbufs; i++) {
color_clear( brw,
brw_surface(brw->curr.fb.cbufs[i]),
rgba );
}
}
if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
if (brw->curr.fb.zsbuf) {
zstencil_clear( brw,
brw_surface(brw->curr.fb.zsbuf),
depth, stencil );
}
}
}
void brw_pipe_clear_init( struct brw_context *brw )
{
brw->base.clear = brw_clear;
}
void brw_pipe_clear_cleanup( struct brw_context *brw )
{
}
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