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 #include "svga_debug.h"
  28
  29 #include "pipe/p_defines.h"
  30 #include "util/u_pack_color.h"
  31
  32 #include "svga_context.h"
  33 #include "svga_state.h"
  34 #include "svga_surface.h"
  35
  36
  37 static enum pipe_error
  38 try_clear(struct svga_context *svga,
  39           unsigned buffers,
  40           const float *rgba,
  41           double depth,
  42           unsigned stencil)
  43 {
  44    int ret = PIPE_OK;
  45    SVGA3dRect rect = { 0, 0, 0, 0 };
  46    boolean restore_viewport = FALSE;
  47    SVGA3dClearFlag flags = 0;
  48    struct pipe_framebuffer_state *fb = &svga->curr.framebuffer;
  49    union util_color uc;
  50
  51    ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR);
  52    if (ret)
  53       return ret;
  54
  55    if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) {
  56       flags |= SVGA3D_CLEAR_COLOR;
  57       util_pack_color(rgba, PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
  58
  59       rect.w = fb->cbufs[0]->width;
  60       rect.h = fb->cbufs[0]->height;
  61    }
  62
  63    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) {
  64       if (buffers & PIPE_CLEAR_DEPTH)
  65          flags |= SVGA3D_CLEAR_DEPTH;
  66
  67       if ((svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_S8_USCALED_Z24_UNORM) &&
  68           (buffers & PIPE_CLEAR_STENCIL))
  69          flags |= SVGA3D_CLEAR_STENCIL;
  70
  71       rect.w = MAX2(rect.w, fb->zsbuf->width);
  72       rect.h = MAX2(rect.h, fb->zsbuf->height);
  73    }
  74
  75    if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
  76       restore_viewport = TRUE;
  77       ret = SVGA3D_SetViewport(svga->swc, &rect);
  78       if (ret)
  79          return ret;
  80    }
  81
  82    ret = SVGA3D_ClearRect(svga->swc, flags, uc.ui, depth, stencil,
  83                           rect.x, rect.y, rect.w, rect.h);
  84    if (ret != PIPE_OK)
  85       return ret;
  86
  87    if (restore_viewport) {
  88       memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect);
  89       ret = SVGA3D_SetViewport(svga->swc, &rect);
  90    }
  91
  92    return ret;
  93 }
  94
  95 /**
  96  * Clear the given surface to the specified value.
  97  * No masking, no scissor (clear entire buffer).
  98  */
  99 void
 100 svga_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
 101            double depth, unsigned stencil)
 102 {
 103    struct svga_context *svga = svga_context( pipe );
 104    int ret;
 105
 106    if (buffers & PIPE_CLEAR_COLOR)
 107       SVGA_DBG(DEBUG_DMA, "clear sid %p\n",
 108                svga_surface(svga->curr.framebuffer.cbufs[0])->handle);
 109
 110    ret = try_clear( svga, buffers, rgba, depth, stencil );
 111
 112    if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
 113       /* Flush command buffer and retry:
 114        */
 115       svga_context_flush( svga, NULL );
 116
 117       ret = try_clear( svga, buffers, rgba, depth, stencil );
 118    }
 119
 120    /*
 121     * Mark target surfaces as dirty
 122     * TODO Mark only cleared surfaces.
 123     */
 124    svga_mark_surfaces_dirty(svga);
 125
 126    assert (ret == PIPE_OK);
 127 }