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 "util/u_framebuffer.h"
  27 #include "util/u_inlines.h"
  28 #include "util/u_pstipple.h"
  29
  30 #include "svga_cmd.h"
  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
  38 svga_set_scissor_states(struct pipe_context *pipe,
  39                         unsigned start_slot,
  40                         unsigned num_scissors,
  41                         const struct pipe_scissor_state *scissors)
  42 {
  43    ASSERTED struct svga_screen *svgascreen = svga_screen(pipe->screen);
  44    struct svga_context *svga = svga_context(pipe);
  45    unsigned i, num_sc;
  46
  47    assert(start_slot + num_scissors <= svgascreen->max_viewports);
  48
  49    for (i = 0, num_sc = start_slot; i < num_scissors; i++)  {
  50       svga->curr.scissor[num_sc++] = scissors[i]; /* struct copy */
  51    }
  52
  53    svga->dirty |= SVGA_NEW_SCISSOR;
  54 }
  55
  56
  57 static void
  58 svga_set_polygon_stipple(struct pipe_context *pipe,
  59                          const struct pipe_poly_stipple *stipple)
  60 {
  61    struct svga_context *svga = svga_context(pipe);
  62
  63    /* release old texture */
  64    pipe_resource_reference(&svga->polygon_stipple.texture, NULL);
  65
  66    /* release old sampler view */
  67    if (svga->polygon_stipple.sampler_view) {
  68       pipe->sampler_view_destroy(pipe,
  69                                  &svga->polygon_stipple.sampler_view->base);
  70    }
  71
  72    /* create new stipple texture */
  73    svga->polygon_stipple.texture =
  74       util_pstipple_create_stipple_texture(pipe, stipple->stipple);
  75
  76    /* create new sampler view */
  77    svga->polygon_stipple.sampler_view =
  78       (struct svga_pipe_sampler_view *)
  79       util_pstipple_create_sampler_view(pipe,
  80                                         svga->polygon_stipple.texture);
  81
  82    /* allocate sampler state, if first time */
  83    if (!svga->polygon_stipple.sampler) {
  84       svga->polygon_stipple.sampler = util_pstipple_create_sampler(pipe);
  85    }
  86
  87    svga->dirty |= SVGA_NEW_STIPPLE;
  88 }
  89
  90
  91 void
  92 svga_cleanup_framebuffer(struct svga_context *svga)
  93 {
  94    struct svga_screen *svgascreen = svga_screen(svga->pipe.screen);
  95    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  96    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  97    unsigned i;
  98
  99    for (i = 0; i < svgascreen->max_color_buffers; i++) {
 100       pipe_surface_reference(&curr->cbufs[i], NULL);
 101       pipe_surface_reference(&hw->cbufs[i], NULL);
 102    }
 103
 104    pipe_surface_reference(&curr->zsbuf, NULL);
 105    pipe_surface_reference(&hw->zsbuf, NULL);
 106 }
 107
 108
 109 #define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))
 110 #define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))
 111 #define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))
 112
 113
 114 static void
 115 svga_set_framebuffer_state(struct pipe_context *pipe,
 116                            const struct pipe_framebuffer_state *fb)
 117 {
 118    struct svga_context *svga = svga_context(pipe);
 119    struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;
 120    unsigned i;
 121
 122    /* make sure any pending drawing calls are flushed before changing
 123     * the framebuffer state
 124     */
 125    svga_hwtnl_flush_retry(svga);
 126
 127    dst->width = fb->width;
 128    dst->height = fb->height;
 129    dst->nr_cbufs = fb->nr_cbufs;
 130
 131    /* Check that all surfaces are the same size.
 132     * Actually, the virtual hardware may support rendertargets with
 133     * different size, depending on the host API and driver,
 134     */
 135    {
 136       int width = 0, height = 0;
 137       if (fb->zsbuf) {
 138          width = fb->zsbuf->width;
 139          height = fb->zsbuf->height;
 140       }
 141       for (i = 0; i < fb->nr_cbufs; ++i) {
 142          if (fb->cbufs[i]) {
 143             if (width && height) {
 144                if (fb->cbufs[i]->width != width ||
 145                    fb->cbufs[i]->height != height) {
 146                   debug_warning("Mixed-size color and depth/stencil surfaces "
 147                                 "may not work properly");
 148                }
 149             }
 150             else {
 151                width = fb->cbufs[i]->width;
 152                height = fb->cbufs[i]->height;
 153             }
 154          }
 155       }
 156    }
 157
 158    util_copy_framebuffer_state(dst, fb);
 159
 160    if (svga->curr.framebuffer.zsbuf) {
 161       switch (svga->curr.framebuffer.zsbuf->format) {
 162       case PIPE_FORMAT_Z16_UNORM:
 163          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;
 164          break;
 165       case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 166       case PIPE_FORMAT_Z24X8_UNORM:
 167       case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 168       case PIPE_FORMAT_X8Z24_UNORM:
 169          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;
 170          break;
 171       case PIPE_FORMAT_Z32_UNORM:
 172          svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;
 173          break;
 174       case PIPE_FORMAT_Z32_FLOAT:
 175          svga->curr.depthscale = 1.0f / ((float)(1<<23));
 176          break;
 177       default:
 178          svga->curr.depthscale = 0.0f;
 179          break;
 180       }
 181    }
 182    else {
 183       svga->curr.depthscale = 0.0f;
 184    }
 185
 186    svga->dirty |= SVGA_NEW_FRAME_BUFFER;
 187 }
 188
 189
 190 static void
 191 svga_set_clip_state(struct pipe_context *pipe,
 192                     const struct pipe_clip_state *clip)
 193 {
 194    struct svga_context *svga = svga_context(pipe);
 195
 196    svga->curr.clip = *clip; /* struct copy */
 197
 198    svga->dirty |= SVGA_NEW_CLIP;
 199 }
 200
 201
 202 static void
 203 svga_set_viewport_states(struct pipe_context *pipe,
 204                          unsigned start_slot,
 205                          unsigned num_viewports,
 206                          const struct pipe_viewport_state *viewports)
 207 {
 208    struct svga_context *svga = svga_context(pipe);
 209    ASSERTED struct svga_screen *svgascreen = svga_screen(pipe->screen);
 210    unsigned i, num_vp;
 211
 212    assert(start_slot + num_viewports <= svgascreen->max_viewports);
 213
 214    for (i = 0, num_vp = start_slot; i < num_viewports; i++)  {
 215       svga->curr.viewport[num_vp++] = viewports[i]; /* struct copy */
 216    }
 217
 218    svga->dirty |= SVGA_NEW_VIEWPORT;
 219 }
 220
 221
 222 /**
 223  * Called by state tracker to specify a callback function the driver
 224  * can use to report info back to the gallium frontend.
 225  */
 226 static void
 227 svga_set_debug_callback(struct pipe_context *pipe,
 228                         const struct pipe_debug_callback *cb)
 229 {
 230    struct svga_context *svga = svga_context(pipe);
 231
 232    if (cb) {
 233       svga->debug.callback = *cb;
 234       svga->swc->debug_callback = &svga->debug.callback;
 235    } else {
 236       memset(&svga->debug.callback, 0, sizeof(svga->debug.callback));
 237       svga->swc->debug_callback = NULL;
 238    }
 239 }
 240
 241
 242 void
 243 svga_init_misc_functions(struct svga_context *svga)
 244 {
 245    svga->pipe.set_scissor_states = svga_set_scissor_states;
 246    svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;
 247    svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;
 248    svga->pipe.set_clip_state = svga_set_clip_state;
 249    svga->pipe.set_viewport_states = svga_set_viewport_states;
 250    svga->pipe.set_debug_callback = svga_set_debug_callback;
 251 }