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      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 union pipe_color_union *color,
     41           double depth,
     42           unsigned stencil)
     43 {
     44    enum pipe_error 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 = {0};
     50 
     51    ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR);
     52    if (ret != PIPE_OK)
     53       return ret;
     54 
     55    if (svga->rebind.rendertargets) {
     56       ret = svga_reemit_framebuffer_bindings(svga);
     57       if (ret != PIPE_OK) {
     58          return ret;
     59       }
     60    }
     61 
     62    if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) {
     63       flags |= SVGA3D_CLEAR_COLOR;
     64       util_pack_color(color->f, PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
     65 
     66       rect.w = fb->cbufs[0]->width;
     67       rect.h = fb->cbufs[0]->height;
     68    }
     69 
     70    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) {
     71       if (buffers & PIPE_CLEAR_DEPTH)
     72          flags |= SVGA3D_CLEAR_DEPTH;
     73 
     74       if ((svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_S8_UINT_Z24_UNORM) &&
     75           (buffers & PIPE_CLEAR_STENCIL))
     76          flags |= SVGA3D_CLEAR_STENCIL;
     77 
     78       rect.w = MAX2(rect.w, fb->zsbuf->width);
     79       rect.h = MAX2(rect.h, fb->zsbuf->height);
     80    }
     81 
     82    if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
     83       restore_viewport = TRUE;
     84       ret = SVGA3D_SetViewport(svga->swc, &rect);
     85       if (ret != PIPE_OK)
     86          return ret;
     87    }
     88 
     89    ret = SVGA3D_ClearRect(svga->swc, flags, uc.ui, depth, stencil,
     90                           rect.x, rect.y, rect.w, rect.h);
     91    if (ret != PIPE_OK)
     92       return ret;
     93 
     94    if (restore_viewport) {
     95       memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect);
     96       ret = SVGA3D_SetViewport(svga->swc, &rect);
     97    }
     98 
     99    return ret;
    100 }
    101 
    102 /**
    103  * Clear the given surface to the specified value.
    104  * No masking, no scissor (clear entire buffer).
    105  */
    106 void
    107 svga_clear(struct pipe_context *pipe, unsigned buffers,
    108            const union pipe_color_union *color,
    109 	   double depth, unsigned stencil)
    110 {
    111    struct svga_context *svga = svga_context( pipe );
    112    enum pipe_error ret;
    113 
    114    if (buffers & PIPE_CLEAR_COLOR)
    115       SVGA_DBG(DEBUG_DMA, "clear sid %p\n",
    116                svga_surface(svga->curr.framebuffer.cbufs[0])->handle);
    117 
    118    /* flush any queued prims (don't want them to appear after the clear!) */
    119    svga_hwtnl_flush_retry(svga);
    120 
    121    ret = try_clear( svga, buffers, color, depth, stencil );
    122 
    123    if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
    124       /* Flush command buffer and retry:
    125        */
    126       svga_context_flush( svga, NULL );
    127 
    128       ret = try_clear( svga, buffers, color, depth, stencil );
    129    }
    130 
    131    /*
    132     * Mark target surfaces as dirty
    133     * TODO Mark only cleared surfaces.
    134     */
    135    svga_mark_surfaces_dirty(svga);
    136 
    137    assert (ret == PIPE_OK);
    138 }
    139