src/gallium/drivers/svga/svga_pipe_misc.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 "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    unsigned 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