src/gallium/drivers/softpipe/sp_clear.c

   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 Dänzer
  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_screen.h"
  41 #include "sp_query.h"
  42 #include "sp_tile_cache.h"
  43
  44
  45 /**
  46  * Clear the given buffers to the specified values.
  47  * No masking, no scissor (clear entire buffer).
  48  */
  49 void
  50 softpipe_clear(struct pipe_context *pipe, unsigned buffers,
  51                const struct pipe_scissor_state *scissor_state,
  52                const union pipe_color_union *color,
  53                double depth, unsigned stencil)
  54 {
  55    struct softpipe_context *softpipe = softpipe_context(pipe);
  56    struct pipe_surface *zsbuf = softpipe->framebuffer.zsbuf;
  57    unsigned zs_buffers = buffers & PIPE_CLEAR_DEPTHSTENCIL;
  58    uint64_t cv;
  59    uint i;
  60
  61    if (unlikely(sp_debug & SP_DBG_NO_RAST))
  62       return;
  63
  64    if (!softpipe_check_render_cond(softpipe))
  65       return;
  66
  67 #if 0
  68    softpipe_update_derived(softpipe, PIPE_PRIM_TRIANGLES); /* not needed?? */
  69 #endif
  70
  71    if (buffers & PIPE_CLEAR_COLOR) {
  72       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
  73          if (buffers & (PIPE_CLEAR_COLOR0 << i))
  74             sp_tile_cache_clear(softpipe->cbuf_cache[i], color, 0);
  75       }
  76    }
  77
  78    if (zs_buffers &&
  79        util_format_is_depth_and_stencil(zsbuf->texture->format) &&
  80        zs_buffers != PIPE_CLEAR_DEPTHSTENCIL) {
  81       /* Clearing only depth or stencil in a combined depth-stencil buffer. */
  82       util_clear_depth_stencil(pipe, zsbuf, zs_buffers, depth, stencil,
  83                                0, 0, zsbuf->width, zsbuf->height);
  84    }
  85    else if (zs_buffers) {
  86       static const union pipe_color_union zero;
  87
  88       cv = util_pack64_z_stencil(zsbuf->format, depth, stencil);
  89       sp_tile_cache_clear(softpipe->zsbuf_cache, &zero, cv);
  90    }
  91
  92    softpipe->dirty_render_cache = TRUE;
  93 }