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/**************************************************************************
*
* Copyright 2007 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.
*
**************************************************************************/
/* Author:
* Brian Paul
*/
#include "pipe/p_defines.h"
#include "util/u_pack_color.h"
#include "sp_clear.h"
#include "sp_context.h"
#include "sp_surface.h"
#include "sp_state.h"
#include "sp_tile_cache.h"
/**
* Convert packed pixel from one format to another.
*/
static unsigned
convert_color(enum pipe_format srcFormat, unsigned srcColor,
enum pipe_format dstFormat)
{
ubyte r, g, b, a;
unsigned dstColor;
util_unpack_color_ub(srcFormat, &srcColor, &r, &g, &b, &a);
util_pack_color_ub(r, g, b, a, dstFormat, &dstColor);
return dstColor;
}
/**
* Clear the given surface to the specified value.
* No masking, no scissor (clear entire buffer).
* Note: when clearing a color buffer, the clearValue is always
* encoded as PIPE_FORMAT_A8R8G8B8_UNORM.
*/
void
softpipe_clear(struct pipe_context *pipe, struct pipe_surface *ps,
unsigned clearValue)
{
struct softpipe_context *softpipe = softpipe_context(pipe);
uint i;
if (softpipe->no_rast)
return;
#if 0
softpipe_update_derived(softpipe); /* not needed?? */
#endif
if (ps == sp_tile_cache_get_surface(softpipe->zsbuf_cache)) {
sp_tile_cache_clear(softpipe->zsbuf_cache, clearValue);
#if TILE_CLEAR_OPTIMIZATION
return;
#endif
}
for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
if (ps == sp_tile_cache_get_surface(softpipe->cbuf_cache[i])) {
unsigned cv;
if (ps->format != PIPE_FORMAT_A8R8G8B8_UNORM) {
cv = convert_color(PIPE_FORMAT_A8R8G8B8_UNORM, clearValue,
ps->format);
}
else {
cv = clearValue;
}
sp_tile_cache_clear(softpipe->cbuf_cache[i], cv);
}
}
#if !TILE_CLEAR_OPTIMIZATION
/* non-cached surface */
pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, clearValue);
#endif
}
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