src/gallium/drivers/svga/svga_pipe_clear.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "svga_cmd.h"
  27
  28 #include "pipe/p_defines.h"
  29 #include "util/u_pack_color.h"
  30
  31 #include "svga_context.h"
  32 #include "svga_state.h"
  33
  34
  35 static enum pipe_error
  36 try_clear(struct svga_context *svga,
  37           unsigned buffers,
  38           const float *rgba,
  39           double depth,
  40           unsigned stencil)
  41 {
  42    int ret = PIPE_OK;
  43    SVGA3dRect rect = { 0, 0, 0, 0 };
  44    boolean restore_viewport = FALSE;
  45    SVGA3dClearFlag flags = 0;
  46    struct pipe_framebuffer_state *fb = &svga->curr.framebuffer;
  47    unsigned color = 0;
  48
  49    ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR);
  50    if (ret)
  51       return ret;
  52
  53    if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) {
  54       flags |= SVGA3D_CLEAR_COLOR;
  55       util_pack_color(rgba, PIPE_FORMAT_A8R8G8B8_UNORM, &color);
  56
  57       rect.w = fb->cbufs[0]->width;
  58       rect.h = fb->cbufs[0]->height;
  59    }
  60
  61    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) {
  62       flags |= SVGA3D_CLEAR_DEPTH;
  63
  64       if (svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_Z24S8_UNORM)
  65          flags |= SVGA3D_CLEAR_STENCIL;
  66
  67       rect.w = MAX2(rect.w, fb->zsbuf->width);
  68       rect.h = MAX2(rect.h, fb->zsbuf->height);
  69    }
  70
  71    if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
  72       restore_viewport = TRUE;
  73       ret = SVGA3D_SetViewport(svga->swc, &rect);
  74       if (ret)
  75          return ret;
  76    }
  77
  78    ret = SVGA3D_ClearRect(svga->swc, flags, color, depth, stencil,
  79                           rect.x, rect.y, rect.w, rect.h);
  80    if (ret != PIPE_OK)
  81       return ret;
  82
  83    if (restore_viewport) {
  84       memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect);
  85       ret = SVGA3D_SetViewport(svga->swc, &rect);
  86    }
  87
  88    return ret;
  89 }
  90
  91 /**
  92  * Clear the given surface to the specified value.
  93  * No masking, no scissor (clear entire buffer).
  94  */
  95 void
  96 svga_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
  97            double depth, unsigned stencil)
  98 {
  99    struct svga_context *svga = svga_context( pipe );
 100    int ret;
 101
 102    ret = try_clear( svga, buffers, rgba, depth, stencil );
 103
 104    if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
 105       /* Flush command buffer and retry:
 106        */
 107       svga_context_flush( svga, NULL );
 108
 109       ret = try_clear( svga, buffers, rgba, depth, stencil );
 110    }
 111
 112    /*
 113     * Mark target surfaces as dirty
 114     * TODO Mark only cleared surfaces.
 115     */
 116    svga_mark_surfaces_dirty(svga);
 117
 118    assert (ret == PIPE_OK);
 119 }