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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      4  * All Rights Reserved.
      5  * Copyright 2009 VMware, Inc.  All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a
      8  * copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sub license, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * The above copyright notice and this permission notice (including the
     16  * next paragraph) shall be included in all copies or substantial portions
     17  * of the Software.
     18  *
     19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     26  *
     27  **************************************************************************/
     28 
     29 /* Author:
     30  *    Brian Paul
     31  *    Michel Dnzer
     32  */
     33 
     34 
     35 #include "pipe/p_defines.h"
     36 #include "util/u_pack_color.h"
     37 #include "util/u_surface.h"
     38 #include "sp_clear.h"
     39 #include "sp_context.h"
     40 #include "sp_query.h"
     41 #include "sp_tile_cache.h"
     42 
     43 
     44 /**
     45  * Clear the given buffers to the specified values.
     46  * No masking, no scissor (clear entire buffer).
     47  */
     48 void
     49 softpipe_clear(struct pipe_context *pipe, unsigned buffers,
     50                const union pipe_color_union *color,
     51                double depth, unsigned stencil)
     52 {
     53    struct softpipe_context *softpipe = softpipe_context(pipe);
     54    struct pipe_surface *zsbuf = softpipe->framebuffer.zsbuf;
     55    unsigned zs_buffers = buffers & PIPE_CLEAR_DEPTHSTENCIL;
     56    uint64_t cv;
     57    uint i;
     58 
     59    if (softpipe->no_rast)
     60       return;
     61 
     62    if (!softpipe_check_render_cond(softpipe))
     63       return;
     64 
     65 #if 0
     66    softpipe_update_derived(softpipe, PIPE_PRIM_TRIANGLES); /* not needed?? */
     67 #endif
     68 
     69    if (buffers & PIPE_CLEAR_COLOR) {
     70       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
     71          sp_tile_cache_clear(softpipe->cbuf_cache[i], color, 0);
     72       }
     73    }
     74 
     75    if (zs_buffers &&
     76        util_format_is_depth_and_stencil(zsbuf->texture->format) &&
     77        zs_buffers != PIPE_CLEAR_DEPTHSTENCIL) {
     78       /* Clearing only depth or stencil in a combined depth-stencil buffer. */
     79       util_clear_depth_stencil(pipe, zsbuf, zs_buffers, depth, stencil,
     80                                0, 0, zsbuf->width, zsbuf->height);
     81    }
     82    else if (zs_buffers) {
     83       static const union pipe_color_union zero;
     84 
     85       cv = util_pack64_z_stencil(zsbuf->format, depth, stencil);
     86       sp_tile_cache_clear(softpipe->zsbuf_cache, &zero, cv);
     87    }
     88 
     89    softpipe->dirty_render_cache = TRUE;
     90 }
     91