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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 
     28 #include "util/u_inlines.h"
     29 
     30 #include "svga_context.h"
     31 #include "svga_surface.h"
     32 
     33 
     34 static void svga_set_scissor_state( struct pipe_context *pipe,
     35                                  const struct pipe_scissor_state *scissor )
     36 {
     37    struct svga_context *svga = svga_context(pipe);
     38 
     39    memcpy( &svga->curr.scissor, scissor, sizeof(*scissor) );
     40    svga->dirty |= SVGA_NEW_SCISSOR;
     41 }
     42 
     43 
     44 static void svga_set_polygon_stipple( struct pipe_context *pipe,
     45                                       const struct pipe_poly_stipple *stipple )
     46 {
     47    /* overridden by the draw module */
     48 }
     49 
     50 
     51 void svga_cleanup_framebuffer(struct svga_context *svga)
     52 {
     53    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
     54    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
     55    int i;
     56 
     57    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
     58       pipe_surface_reference(&curr->cbufs[i], NULL);
     59       pipe_surface_reference(&hw->cbufs[i], NULL);
     60    }
     61 
     62    pipe_surface_reference(&curr->zsbuf, NULL);
     63    pipe_surface_reference(&hw->zsbuf, NULL);
     64 }
     65 
     66 
     67 #define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))
     68 #define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))
     69 #define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))
     70 
     71 
     72 static void svga_set_framebuffer_state(struct pipe_context *pipe,
     73 				       const struct pipe_framebuffer_state *fb)
     74 {
     75    struct svga_context *svga = svga_context(pipe);
     76    struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;
     77    boolean propagate = FALSE;
     78    int i;
     79 
     80    dst->width = fb->width;
     81    dst->height = fb->height;
     82    dst->nr_cbufs = fb->nr_cbufs;
     83 
     84    /* check if we need to propagate any of the target surfaces */
     85    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
     86       if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
     87          if (svga_surface_needs_propagation(dst->cbufs[i]))
     88             propagate = TRUE;
     89    }
     90 
     91    if (propagate) {
     92       /* make sure that drawing calls comes before propagation calls */
     93       svga_hwtnl_flush_retry( svga );
     94 
     95       for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
     96          if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
     97             svga_propagate_surface(svga, dst->cbufs[i]);
     98    }
     99 
    100    /* XXX: Actually the virtual hardware may support rendertargets with
    101     * different size, depending on the host API and driver, but since we cannot
    102     * know that make no such assumption here. */
    103    for(i = 0; i < fb->nr_cbufs; ++i) {
    104       if (fb->zsbuf && fb->cbufs[i]) {
    105          assert(fb->zsbuf->width == fb->cbufs[i]->width);
    106          assert(fb->zsbuf->height == fb->cbufs[i]->height);
    107       }
    108    }
    109 
    110    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
    111       pipe_surface_reference(&dst->cbufs[i],
    112                              (i < fb->nr_cbufs) ? fb->cbufs[i] : NULL);
    113    }
    114    pipe_surface_reference(&dst->zsbuf, fb->zsbuf);
    115 
    116 
    117    if (svga->curr.framebuffer.zsbuf)
    118    {
    119       switch (svga->curr.framebuffer.zsbuf->format) {
    120       case PIPE_FORMAT_Z16_UNORM:
    121          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
    122          break;
    123       case PIPE_FORMAT_Z24_UNORM_S8_UINT:
    124       case PIPE_FORMAT_Z24X8_UNORM:
    125       case PIPE_FORMAT_S8_UINT_Z24_UNORM:
    126       case PIPE_FORMAT_X8Z24_UNORM:
    127          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
    128          break;
    129       case PIPE_FORMAT_Z32_UNORM:
    130          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
    131          break;
    132       case PIPE_FORMAT_Z32_FLOAT:
    133          svga->curr.depthscale = 1.0f / ((float)(1<<23));
    134          break;
    135       default:
    136          svga->curr.depthscale = 0.0f;
    137          break;
    138       }
    139    }
    140    else {
    141       svga->curr.depthscale = 0.0f;
    142    }
    143 
    144    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
    145 }
    146 
    147 
    148 
    149 static void svga_set_clip_state( struct pipe_context *pipe,
    150                                  const struct pipe_clip_state *clip )
    151 {
    152    struct svga_context *svga = svga_context(pipe);
    153 
    154    svga->curr.clip = *clip; /* struct copy */
    155 
    156    svga->dirty |= SVGA_NEW_CLIP;
    157 }
    158 
    159 
    160 
    161 /* Called when driver state tracker notices changes to the viewport
    162  * matrix:
    163  */
    164 static void svga_set_viewport_state( struct pipe_context *pipe,
    165 				     const struct pipe_viewport_state *viewport )
    166 {
    167    struct svga_context *svga = svga_context(pipe);
    168 
    169    svga->curr.viewport = *viewport; /* struct copy */
    170 
    171    svga->dirty |= SVGA_NEW_VIEWPORT;
    172 }
    173 
    174 
    175 
    176 void svga_init_misc_functions( struct svga_context *svga )
    177 {
    178    svga->pipe.set_scissor_state = svga_set_scissor_state;
    179    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
    180    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
    181    svga->pipe.set_clip_state = svga_set_clip_state;
    182    svga->pipe.set_viewport_state = svga_set_viewport_state;
    183 }
    184 
    185 
    186