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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.
*
**************************************************************************/
/**
* Authors
* Brian Paul
*/
#include <stdio.h>
#include <assert.h>
#include <stdint.h>
#include "pipe/p_inlines.h"
#include "util/u_memory.h"
#include "util/u_pack_color.h"
#include "cell/common.h"
#include "cell_clear.h"
#include "cell_context.h"
#include "cell_batch.h"
#include "cell_flush.h"
#include "cell_spu.h"
#include "cell_state.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;
}
/**
* Called via pipe->clear()
*/
void
cell_clear_surface(struct pipe_context *pipe, struct pipe_surface *ps,
unsigned clearValue)
{
struct pipe_screen *screen = pipe->screen;
struct cell_context *cell = cell_context(pipe);
uint surfIndex;
if (cell->dirty)
cell_update_derived(cell);
if (!cell->cbuf_map[0])
cell->cbuf_map[0] = screen->surface_map(screen, ps,
PIPE_BUFFER_USAGE_GPU_WRITE);
if (ps == cell->framebuffer.zsbuf) {
/* clear z/stencil buffer */
surfIndex = 1;
}
else {
/* clear color buffer */
surfIndex = 0;
if (ps->format != PIPE_FORMAT_A8R8G8B8_UNORM) {
clearValue = convert_color(PIPE_FORMAT_A8R8G8B8_UNORM, clearValue,
ps->format);
}
}
/* Build a CLEAR command and place it in the current batch buffer */
{
STATIC_ASSERT(sizeof(struct cell_command_clear_surface) % 16 == 0);
struct cell_command_clear_surface *clr
= (struct cell_command_clear_surface *)
cell_batch_alloc16(cell, sizeof(*clr));
clr->opcode[0] = CELL_CMD_CLEAR_SURFACE;
clr->surface = surfIndex;
clr->value = clearValue;
}
/* Technically, the surface's contents are now known and cleared,
* so we could set the status to PIPE_SURFACE_STATUS_CLEAR. But
* it turns out it's quite painful to recognize when any particular
* surface goes from PIPE_SURFACE_STATUS_CLEAR to
* PIPE_SURFACE_STATUS_DEFINED (i.e. with known contents), because
* the drawing commands could be operating on numerous draw buffers,
* which we'd have to iterate through to set all their stati...
* For now, we cheat a bit and set the surface's status to DEFINED
* right here. Later we should revisit this and set the status to
* CLEAR here, and find a better place to set the status to DEFINED.
*/
ps->status = PIPE_SURFACE_STATUS_DEFINED;
}
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