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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 "sp_clear.h"
#include "sp_context.h"
#include "sp_surface.h"
#include "sp_state.h"
#include "colormac.h"
static GLuint
color_value(GLuint format, const GLfloat color[4])
{
GLubyte r, g, b, a;
UNCLAMPED_FLOAT_TO_UBYTE(r, color[0]);
UNCLAMPED_FLOAT_TO_UBYTE(g, color[1]);
UNCLAMPED_FLOAT_TO_UBYTE(b, color[2]);
UNCLAMPED_FLOAT_TO_UBYTE(a, color[3]);
switch (format) {
case PIPE_FORMAT_U_R8_G8_B8_A8:
return (r << 24) | (g << 16) | (b << 8) | a;
case PIPE_FORMAT_U_A8_R8_G8_B8:
return (a << 24) | (r << 16) | (g << 8) | b;
case PIPE_FORMAT_U_R5_G6_B5:
return ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3);
default:
return 0;
}
}
void
softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
GLboolean stencil)
{
struct softpipe_context *softpipe = softpipe_context(pipe);
GLint x, y, w, h;
softpipe_update_derived(softpipe); /* not needed?? */
x = 0;
y = 0;
w = softpipe->framebuffer.cbufs[0]->width;
h = softpipe->framebuffer.cbufs[0]->height;
if (color) {
GLuint i;
for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];
GLuint clearVal = color_value(ps->format,
softpipe->clear_color.color);
pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
}
}
if (depth && stencil &&
softpipe->framebuffer.zbuf == softpipe->framebuffer.sbuf) {
/* clear Z and stencil together */
struct pipe_surface *ps = softpipe->framebuffer.zbuf;
if (ps->format == PIPE_FORMAT_S8_Z24) {
GLuint mask = (softpipe->stencil.write_mask[0] << 8) | 0xffffff;
GLuint clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
assert (mask == ~0);
clearVal |= (softpipe->stencil.clear_value << 24);
pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
}
else {
/* XXX Z24_S8 format? */
assert(0);
}
}
else {
/* separate Z and stencil */
if (depth) {
struct pipe_surface *ps = softpipe->framebuffer.zbuf;
GLuint clearVal;
switch (ps->format) {
case PIPE_FORMAT_U_Z16:
clearVal = (GLuint) (softpipe->depth_test.clear * 65535.0);
break;
case PIPE_FORMAT_U_Z32:
clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffffff);
break;
case PIPE_FORMAT_S8_Z24:
clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
break;
default:
assert(0);
}
pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
}
if (stencil) {
struct pipe_surface *ps = softpipe->framebuffer.sbuf;
GLuint clearVal = softpipe->stencil.clear_value;
/* If this is not ~0, we shouldn't get here - clear should be
* done with geometry instead.
*/
GLuint mask = softpipe->stencil.write_mask[0];
assert((mask & 0xff) == 0xff);
switch (ps->format) {
case PIPE_FORMAT_S8_Z24:
clearVal = clearVal << 24;
mask = mask << 24;
break;
case PIPE_FORMAT_U_S8:
/* nothing */
break;
default:
assert(0);
}
pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
}
}
}
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