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 #include "svga_state.h"
  31 #include "svga_winsys.h"
  32
  33 #include "svga_hw_reg.h"
  34
  35
  36
  37
  38 static void svga_set_scissor_state( struct pipe_context *pipe,
  39                                  const struct pipe_scissor_state *scissor )
  40 {
  41    struct svga_context *svga = svga_context(pipe);
  42
  43    memcpy( &svga->curr.scissor, scissor, sizeof(*scissor) );
  44    svga->dirty |= SVGA_NEW_SCISSOR;
  45 }
  46
  47
  48 static void svga_set_polygon_stipple( struct pipe_context *pipe,
  49                                       const struct pipe_poly_stipple *stipple )
  50 {
  51    /* overridden by the draw module */
  52 }
  53
  54
  55 void svga_cleanup_framebuffer(struct svga_context *svga)
  56 {
  57    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  58    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  59    int i;
  60
  61    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  62       pipe_surface_reference(&curr->cbufs[i], NULL);
  63       pipe_surface_reference(&hw->cbufs[i], NULL);
  64    }
  65
  66    pipe_surface_reference(&curr->zsbuf, NULL);
  67    pipe_surface_reference(&hw->zsbuf, NULL);
  68 }
  69
  70
  71 #define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))
  72 #define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))
  73 #define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))
  74
  75
  76 static void svga_set_framebuffer_state(struct pipe_context *pipe,
  77                                        const struct pipe_framebuffer_state *fb)
  78 {
  79    struct svga_context *svga = svga_context(pipe);
  80    struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;
  81    boolean propagate = FALSE;
  82    int i;
  83
  84    dst->width = fb->width;
  85    dst->height = fb->height;
  86    dst->nr_cbufs = fb->nr_cbufs;
  87
  88    /* check if we need to propaget any of the target surfaces */
  89    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  90       if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
  91          if (svga_surface_needs_propagation(dst->cbufs[i]))
  92             propagate = TRUE;
  93    }
  94
  95    if (propagate) {
  96       /* make sure that drawing calls comes before propagation calls */
  97       svga_hwtnl_flush_retry( svga );
  98
  99       for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
 100          if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
 101             svga_propagate_surface(pipe, dst->cbufs[i]);
 102    }
 103
 104    /* XXX: Actually the virtual hardware may support rendertargets with
 105     * different size, depending on the host API and driver, but since we cannot
 106     * know that make no such assumption here. */
 107    for(i = 0; i < fb->nr_cbufs; ++i) {
 108       if (fb->zsbuf && fb->cbufs[i]) {
 109          assert(fb->zsbuf->width == fb->cbufs[i]->width);
 110          assert(fb->zsbuf->height == fb->cbufs[i]->height);
 111       }
 112    }
 113
 114    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
 115       pipe_surface_reference(&dst->cbufs[i], fb->cbufs[i]);
 116    pipe_surface_reference(&dst->zsbuf, fb->zsbuf);
 117
 118
 119    if (svga->curr.framebuffer.zsbuf)
 120    {
 121       switch (svga->curr.framebuffer.zsbuf->format) {
 122       case PIPE_FORMAT_Z16_UNORM:
 123          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
 124          break;
 125       case PIPE_FORMAT_S8Z24_UNORM:
 126       case PIPE_FORMAT_X8Z24_UNORM:
 127       case PIPE_FORMAT_Z24S8_UNORM:
 128       case PIPE_FORMAT_Z24X8_UNORM:
 129          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
 130          break;
 131       case PIPE_FORMAT_Z32_UNORM:
 132          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
 133          break;
 134       case PIPE_FORMAT_Z32_FLOAT:
 135          svga->curr.depthscale = 1.0f / ((float)(1<<23));
 136          break;
 137       default:
 138          svga->curr.depthscale = 0.0f;
 139          break;
 140       }
 141    }
 142    else {
 143       svga->curr.depthscale = 0.0f;
 144    }
 145
 146    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
 147 }
 148
 149
 150
 151 static void svga_set_clip_state( struct pipe_context *pipe,
 152                                  const struct pipe_clip_state *clip )
 153 {
 154    struct svga_context *svga = svga_context(pipe);
 155
 156    svga->curr.clip = *clip; /* struct copy */
 157
 158    svga->dirty |= SVGA_NEW_CLIP;
 159 }
 160
 161
 162
 163 /* Called when driver state tracker notices changes to the viewport
 164  * matrix:
 165  */
 166 static void svga_set_viewport_state( struct pipe_context *pipe,
 167                                      const struct pipe_viewport_state *viewport )
 168 {
 169    struct svga_context *svga = svga_context(pipe);
 170
 171    svga->curr.viewport = *viewport; /* struct copy */
 172
 173    svga->dirty |= SVGA_NEW_VIEWPORT;
 174 }
 175
 176
 177
 178 void svga_init_misc_functions( struct svga_context *svga )
 179 {
 180    svga->pipe.set_scissor_state = svga_set_scissor_state;
 181    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
 182    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
 183    svga->pipe.set_clip_state = svga_set_clip_state;
 184    svga->pipe.set_viewport_state = svga_set_viewport_state;
 185 }
 186
 187