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_framebuffer.h"
  29 #include "util/u_inlines.h"
  30
  31 #include "svga_context.h"
  32 #include "svga_screen.h"
  33 #include "svga_surface.h"
  34 #include "svga_resource_texture.h"
  35
  36
  37 static void svga_set_scissor_states( struct pipe_context *pipe,
  38                                      unsigned start_slot,
  39                                      unsigned num_scissors,
  40                                      const struct pipe_scissor_state *scissors )
  41 {
  42    struct svga_context *svga = svga_context(pipe);
  43
  44    memcpy( &svga->curr.scissor, scissors, sizeof(*scissors) );
  45    svga->dirty |= SVGA_NEW_SCISSOR;
  46 }
  47
  48
  49 static void svga_set_polygon_stipple( struct pipe_context *pipe,
  50                                       const struct pipe_poly_stipple *stipple )
  51 {
  52    /* overridden by the draw module */
  53 }
  54
  55
  56 void svga_cleanup_framebuffer(struct svga_context *svga)
  57 {
  58    struct svga_screen *svgascreen = svga_screen(svga->pipe.screen);
  59    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  60    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  61    unsigned i;
  62
  63    for (i = 0; i < svgascreen->max_color_buffers; i++) {
  64       pipe_surface_reference(&curr->cbufs[i], NULL);
  65       pipe_surface_reference(&hw->cbufs[i], NULL);
  66    }
  67
  68    pipe_surface_reference(&curr->zsbuf, NULL);
  69    pipe_surface_reference(&hw->zsbuf, NULL);
  70 }
  71
  72
  73 #define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))
  74 #define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))
  75 #define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))
  76
  77
  78 static void svga_set_framebuffer_state(struct pipe_context *pipe,
  79                                        const struct pipe_framebuffer_state *fb)
  80 {
  81    struct svga_context *svga = svga_context(pipe);
  82    struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;
  83    boolean propagate = FALSE;
  84    unsigned i;
  85
  86    dst->width = fb->width;
  87    dst->height = fb->height;
  88    dst->nr_cbufs = fb->nr_cbufs;
  89
  90    /* check if we need to propagate any of the target surfaces */
  91    for (i = 0; i < dst->nr_cbufs; i++) {
  92       struct pipe_surface *s = i < fb->nr_cbufs ? fb->cbufs[i] : NULL;
  93       if (dst->cbufs[i] && dst->cbufs[i] != s) {
  94          if (svga_surface_needs_propagation(dst->cbufs[i])) {
  95             propagate = TRUE;
  96             break;
  97          }
  98       }
  99    }
 100
 101    if (propagate) {
 102       /* make sure that drawing calls comes before propagation calls */
 103       svga_hwtnl_flush_retry( svga );
 104
 105       for (i = 0; i < dst->nr_cbufs; i++) {
 106          struct pipe_surface *s = i < fb->nr_cbufs ? fb->cbufs[i] : NULL;
 107          if (dst->cbufs[i] && dst->cbufs[i] != s)
 108             svga_propagate_surface(svga, dst->cbufs[i]);
 109       }
 110    }
 111
 112    /* XXX: Actually the virtual hardware may support rendertargets with
 113     * different size, depending on the host API and driver, but since we cannot
 114     * know that make no such assumption here. */
 115    for(i = 0; i < fb->nr_cbufs; ++i) {
 116       if (fb->zsbuf && fb->cbufs[i]) {
 117          assert(fb->zsbuf->width == fb->cbufs[i]->width);
 118          assert(fb->zsbuf->height == fb->cbufs[i]->height);
 119       }
 120    }
 121
 122    util_copy_framebuffer_state(dst, fb);
 123
 124    /* Set the rendered-to flags */
 125    for (i = 0; i < dst->nr_cbufs; i++) {
 126       struct pipe_surface *s = dst->cbufs[i];
 127       if (s) {
 128          struct svga_texture *t = svga_texture(s->texture);
 129          svga_set_texture_rendered_to(t, s->u.tex.first_layer, s->u.tex.level);
 130       }
 131    }
 132
 133    if (svga->curr.framebuffer.zsbuf)
 134    {
 135       switch (svga->curr.framebuffer.zsbuf->format) {
 136       case PIPE_FORMAT_Z16_UNORM:
 137          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
 138          break;
 139       case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 140       case PIPE_FORMAT_Z24X8_UNORM:
 141       case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 142       case PIPE_FORMAT_X8Z24_UNORM:
 143          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
 144          break;
 145       case PIPE_FORMAT_Z32_UNORM:
 146          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
 147          break;
 148       case PIPE_FORMAT_Z32_FLOAT:
 149          svga->curr.depthscale = 1.0f / ((float)(1<<23));
 150          break;
 151       default:
 152          svga->curr.depthscale = 0.0f;
 153          break;
 154       }
 155
 156       /* Set rendered-to flag */
 157       {
 158          struct pipe_surface *s = dst->zsbuf;
 159          struct svga_texture *t = svga_texture(s->texture);
 160          svga_set_texture_rendered_to(t, s->u.tex.first_layer, s->u.tex.level);
 161       }
 162    }
 163    else {
 164       svga->curr.depthscale = 0.0f;
 165    }
 166
 167    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
 168 }
 169
 170
 171
 172 static void svga_set_clip_state( struct pipe_context *pipe,
 173                                  const struct pipe_clip_state *clip )
 174 {
 175    struct svga_context *svga = svga_context(pipe);
 176
 177    svga->curr.clip = *clip; /* struct copy */
 178
 179    svga->dirty |= SVGA_NEW_CLIP;
 180 }
 181
 182
 183
 184 /* Called when driver state tracker notices changes to the viewport
 185  * matrix:
 186  */
 187 static void svga_set_viewport_states( struct pipe_context *pipe,
 188                                       unsigned start_slot,
 189                                       unsigned num_viewports,
 190                                       const struct pipe_viewport_state *viewports )
 191 {
 192    struct svga_context *svga = svga_context(pipe);
 193
 194    svga->curr.viewport = *viewports; /* struct copy */
 195
 196    svga->dirty |= SVGA_NEW_VIEWPORT;
 197 }
 198
 199
 200
 201 void svga_init_misc_functions( struct svga_context *svga )
 202 {
 203    svga->pipe.set_scissor_states = svga_set_scissor_states;
 204    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
 205    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
 206    svga->pipe.set_clip_state = svga_set_clip_state;
 207    svga->pipe.set_viewport_states = svga_set_viewport_states;
 208 }
 209
 210