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 "svga_context.h"
  29 #include "svga_screen_texture.h"
  30
  31
  32 static void svga_set_scissor_state( struct pipe_context *pipe,
  33                                  const struct pipe_scissor_state *scissor )
  34 {
  35    struct svga_context *svga = svga_context(pipe);
  36
  37    memcpy( &svga->curr.scissor, scissor, sizeof(*scissor) );
  38    svga->dirty |= SVGA_NEW_SCISSOR;
  39 }
  40
  41
  42 static void svga_set_polygon_stipple( struct pipe_context *pipe,
  43                                       const struct pipe_poly_stipple *stipple )
  44 {
  45    /* overridden by the draw module */
  46 }
  47
  48
  49 void svga_cleanup_framebuffer(struct svga_context *svga)
  50 {
  51    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  52    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  53    int i;
  54
  55    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  56       pipe_surface_reference(&curr->cbufs[i], NULL);
  57       pipe_surface_reference(&hw->cbufs[i], NULL);
  58    }
  59
  60    pipe_surface_reference(&curr->zsbuf, NULL);
  61    pipe_surface_reference(&hw->zsbuf, NULL);
  62 }
  63
  64
  65 #define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))
  66 #define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))
  67 #define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))
  68
  69
  70 static void svga_set_framebuffer_state(struct pipe_context *pipe,
  71                                        const struct pipe_framebuffer_state *fb)
  72 {
  73    struct svga_context *svga = svga_context(pipe);
  74    struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;
  75    boolean propagate = FALSE;
  76    int i;
  77
  78    dst->width = fb->width;
  79    dst->height = fb->height;
  80    dst->nr_cbufs = fb->nr_cbufs;
  81
  82    /* check if we need to propaget any of the target surfaces */
  83    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  84       if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
  85          if (svga_surface_needs_propagation(dst->cbufs[i]))
  86             propagate = TRUE;
  87    }
  88
  89    if (propagate) {
  90       /* make sure that drawing calls comes before propagation calls */
  91       svga_hwtnl_flush_retry( svga );
  92
  93       for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
  94          if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
  95             svga_propagate_surface(pipe, dst->cbufs[i]);
  96    }
  97
  98    /* XXX: Actually the virtual hardware may support rendertargets with
  99     * different size, depending on the host API and driver, but since we cannot
 100     * know that make no such assumption here. */
 101    for(i = 0; i < fb->nr_cbufs; ++i) {
 102       if (fb->zsbuf && fb->cbufs[i]) {
 103          assert(fb->zsbuf->width == fb->cbufs[i]->width);
 104          assert(fb->zsbuf->height == fb->cbufs[i]->height);
 105       }
 106    }
 107
 108    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
 109       pipe_surface_reference(&dst->cbufs[i], fb->cbufs[i]);
 110    pipe_surface_reference(&dst->zsbuf, fb->zsbuf);
 111
 112
 113    if (svga->curr.framebuffer.zsbuf)
 114    {
 115       switch (svga->curr.framebuffer.zsbuf->format) {
 116       case PIPE_FORMAT_Z16_UNORM:
 117          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
 118          break;
 119       case PIPE_FORMAT_S8Z24_UNORM:
 120       case PIPE_FORMAT_X8Z24_UNORM:
 121       case PIPE_FORMAT_Z24S8_UNORM:
 122       case PIPE_FORMAT_Z24X8_UNORM:
 123          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
 124          break;
 125       case PIPE_FORMAT_Z32_UNORM:
 126          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
 127          break;
 128       case PIPE_FORMAT_Z32_FLOAT:
 129          svga->curr.depthscale = 1.0f / ((float)(1<<23));
 130          break;
 131       default:
 132          svga->curr.depthscale = 0.0f;
 133          break;
 134       }
 135    }
 136    else {
 137       svga->curr.depthscale = 0.0f;
 138    }
 139
 140    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
 141 }
 142
 143
 144
 145 static void svga_set_clip_state( struct pipe_context *pipe,
 146                                  const struct pipe_clip_state *clip )
 147 {
 148    struct svga_context *svga = svga_context(pipe);
 149
 150    svga->curr.clip = *clip; /* struct copy */
 151
 152    svga->dirty |= SVGA_NEW_CLIP;
 153 }
 154
 155
 156
 157 /* Called when driver state tracker notices changes to the viewport
 158  * matrix:
 159  */
 160 static void svga_set_viewport_state( struct pipe_context *pipe,
 161                                      const struct pipe_viewport_state *viewport )
 162 {
 163    struct svga_context *svga = svga_context(pipe);
 164
 165    svga->curr.viewport = *viewport; /* struct copy */
 166
 167    svga->dirty |= SVGA_NEW_VIEWPORT;
 168 }
 169
 170
 171
 172 void svga_init_misc_functions( struct svga_context *svga )
 173 {
 174    svga->pipe.set_scissor_state = svga_set_scissor_state;
 175    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
 176    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
 177    svga->pipe.set_clip_state = svga_set_clip_state;
 178    svga->pipe.set_viewport_state = svga_set_viewport_state;
 179 }
 180
 181