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_screen.h"
  32 #include "svga_surface.h"
  33
  34
  35 static void svga_set_scissor_states( struct pipe_context *pipe,
  36                                      unsigned start_slot,
  37                                      unsigned num_scissors,
  38                                      const struct pipe_scissor_state *scissors )
  39 {
  40    struct svga_context *svga = svga_context(pipe);
  41
  42    memcpy( &svga->curr.scissor, scissors, sizeof(*scissors) );
  43    svga->dirty |= SVGA_NEW_SCISSOR;
  44 }
  45
  46
  47 static void svga_set_polygon_stipple( struct pipe_context *pipe,
  48                                       const struct pipe_poly_stipple *stipple )
  49 {
  50    /* overridden by the draw module */
  51 }
  52
  53
  54 void svga_cleanup_framebuffer(struct svga_context *svga)
  55 {
  56    struct svga_screen *svgascreen = svga_screen(svga->pipe.screen);
  57    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  58    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  59    unsigned i;
  60
  61    for (i = 0; i < svgascreen->max_color_buffers; 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    unsigned 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 propagate 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(svga, 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],
 116                              (i < fb->nr_cbufs) ? fb->cbufs[i] : NULL);
 117    }
 118    pipe_surface_reference(&dst->zsbuf, fb->zsbuf);
 119
 120
 121    if (svga->curr.framebuffer.zsbuf)
 122    {
 123       switch (svga->curr.framebuffer.zsbuf->format) {
 124       case PIPE_FORMAT_Z16_UNORM:
 125          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
 126          break;
 127       case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 128       case PIPE_FORMAT_Z24X8_UNORM:
 129       case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 130       case PIPE_FORMAT_X8Z24_UNORM:
 131          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
 132          break;
 133       case PIPE_FORMAT_Z32_UNORM:
 134          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
 135          break;
 136       case PIPE_FORMAT_Z32_FLOAT:
 137          svga->curr.depthscale = 1.0f / ((float)(1<<23));
 138          break;
 139       default:
 140          svga->curr.depthscale = 0.0f;
 141          break;
 142       }
 143    }
 144    else {
 145       svga->curr.depthscale = 0.0f;
 146    }
 147
 148    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
 149 }
 150
 151
 152
 153 static void svga_set_clip_state( struct pipe_context *pipe,
 154                                  const struct pipe_clip_state *clip )
 155 {
 156    struct svga_context *svga = svga_context(pipe);
 157
 158    svga->curr.clip = *clip; /* struct copy */
 159
 160    svga->dirty |= SVGA_NEW_CLIP;
 161 }
 162
 163
 164
 165 /* Called when driver state tracker notices changes to the viewport
 166  * matrix:
 167  */
 168 static void svga_set_viewport_states( struct pipe_context *pipe,
 169                                       unsigned start_slot,
 170                                       unsigned num_viewports,
 171                                       const struct pipe_viewport_state *viewports )
 172 {
 173    struct svga_context *svga = svga_context(pipe);
 174
 175    svga->curr.viewport = *viewports; /* struct copy */
 176
 177    svga->dirty |= SVGA_NEW_VIEWPORT;
 178 }
 179
 180
 181
 182 void svga_init_misc_functions( struct svga_context *svga )
 183 {
 184    svga->pipe.set_scissor_states = svga_set_scissor_states;
 185    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
 186    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
 187    svga->pipe.set_clip_state = svga_set_clip_state;
 188    svga->pipe.set_viewport_states = svga_set_viewport_states;
 189 }
 190
 191