src/gallium/state_trackers/python/st_device.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "pipe/p_screen.h"
  30 #include "pipe/p_context.h"
  31 #include "pipe/p_shader_tokens.h"
  32 #include "util/u_inlines.h"
  33 #include "cso_cache/cso_context.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_sampler.h"
  37 #include "util/u_simple_shaders.h"
  38 #include "trace/tr_screen.h"
  39 #include "trace/tr_context.h"
  40
  41 #include "st_device.h"
  42 #include "st_winsys.h"
  43
  44
  45 static void
  46 st_device_really_destroy(struct st_device *st_dev)
  47 {
  48    if(st_dev->screen) {
  49       /* FIXME: Don't really destroy until we keep track of every single
  50        * reference or we end up causing a segmentation fault every time
  51        * python exits. */
  52 #if 0
  53       st_dev->screen->destroy(st_dev->screen);
  54 #endif
  55    }
  56
  57    FREE(st_dev);
  58 }
  59
  60
  61 static void
  62 st_device_reference(struct st_device **ptr, struct st_device *st_dev)
  63 {
  64    struct st_device *old_dev = *ptr;
  65
  66    if (pipe_reference(&(*ptr)->reference, &st_dev->reference))
  67       st_device_really_destroy(old_dev);
  68    *ptr = st_dev;
  69 }
  70
  71
  72 void
  73 st_device_destroy(struct st_device *st_dev)
  74 {
  75    st_device_reference(&st_dev, NULL);
  76 }
  77
  78
  79 static struct st_device *
  80 st_device_create_from_st_winsys(const struct st_winsys *st_ws)
  81 {
  82    struct st_device *st_dev;
  83
  84    if(!st_ws->screen_create)
  85       return NULL;
  86
  87    st_dev = CALLOC_STRUCT(st_device);
  88    if(!st_dev)
  89       return NULL;
  90
  91    pipe_reference_init(&st_dev->reference, 1);
  92    st_dev->st_ws = st_ws;
  93
  94    st_dev->real_screen = st_ws->screen_create();
  95    if(!st_dev->real_screen) {
  96       st_device_destroy(st_dev);
  97       return NULL;
  98    }
  99
 100    st_dev->screen = trace_screen_create(st_dev->real_screen);
 101    if(!st_dev->screen) {
 102       st_device_destroy(st_dev);
 103       return NULL;
 104    }
 105
 106    return st_dev;
 107 }
 108
 109
 110 struct st_device *
 111 st_device_create(boolean hardware) {
 112    if(hardware)
 113       return st_device_create_from_st_winsys(&st_hardpipe_winsys);
 114    else
 115       return st_device_create_from_st_winsys(&st_softpipe_winsys);
 116 }
 117
 118
 119 void
 120 st_context_destroy(struct st_context *st_ctx)
 121 {
 122    unsigned i;
 123
 124    if(st_ctx) {
 125       struct st_device *st_dev = st_ctx->st_dev;
 126
 127       if(st_ctx->cso) {
 128          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 129          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 130
 131          cso_destroy_context(st_ctx->cso);
 132       }
 133
 134       if(st_ctx->pipe)
 135          st_ctx->pipe->destroy(st_ctx->pipe);
 136
 137       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 138          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], NULL);
 139       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 140          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], NULL);
 141       pipe_texture_reference(&st_ctx->default_texture, NULL);
 142
 143       FREE(st_ctx);
 144
 145       st_device_reference(&st_dev, NULL);
 146    }
 147 }
 148
 149
 150 struct st_context *
 151 st_context_create(struct st_device *st_dev)
 152 {
 153    struct st_context *st_ctx;
 154
 155    st_ctx = CALLOC_STRUCT(st_context);
 156    if(!st_ctx)
 157       return NULL;
 158
 159    st_device_reference(&st_ctx->st_dev, st_dev);
 160
 161    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 162    if(!st_ctx->pipe) {
 163       st_context_destroy(st_ctx);
 164       return NULL;
 165    }
 166
 167    st_ctx->cso = cso_create_context(st_ctx->pipe);
 168    if(!st_ctx->cso) {
 169       st_context_destroy(st_ctx);
 170       return NULL;
 171    }
 172
 173    /* disabled blending/masking */
 174    {
 175       struct pipe_blend_state blend;
 176       memset(&blend, 0, sizeof(blend));
 177       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 178       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 179       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 180       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 181       blend.rt[0].colormask = PIPE_MASK_RGBA;
 182       cso_set_blend(st_ctx->cso, &blend);
 183    }
 184
 185    /* no-op depth/stencil/alpha */
 186    {
 187       struct pipe_depth_stencil_alpha_state depthstencil;
 188       memset(&depthstencil, 0, sizeof(depthstencil));
 189       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 190    }
 191
 192    /* rasterizer */
 193    {
 194       struct pipe_rasterizer_state rasterizer;
 195       memset(&rasterizer, 0, sizeof(rasterizer));
 196       rasterizer.front_winding = PIPE_WINDING_CW;
 197       rasterizer.cull_mode = PIPE_WINDING_NONE;
 198       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 199    }
 200
 201    /* clip */
 202    {
 203       struct pipe_clip_state clip;
 204       memset(&clip, 0, sizeof(clip));
 205       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 206    }
 207
 208    /* identity viewport */
 209    {
 210       struct pipe_viewport_state viewport;
 211       viewport.scale[0] = 1.0;
 212       viewport.scale[1] = 1.0;
 213       viewport.scale[2] = 1.0;
 214       viewport.scale[3] = 1.0;
 215       viewport.translate[0] = 0.0;
 216       viewport.translate[1] = 0.0;
 217       viewport.translate[2] = 0.0;
 218       viewport.translate[3] = 0.0;
 219       cso_set_viewport(st_ctx->cso, &viewport);
 220    }
 221
 222    /* samplers */
 223    {
 224       struct pipe_sampler_state sampler;
 225       unsigned i;
 226       memset(&sampler, 0, sizeof(sampler));
 227       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 228       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 229       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 230       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 231       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 232       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 233       sampler.normalized_coords = 1;
 234       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 235          cso_single_sampler(st_ctx->cso, i, &sampler);
 236       cso_single_sampler_done(st_ctx->cso);
 237    }
 238
 239    /* default textures */
 240    {
 241       struct pipe_screen *screen = st_dev->screen;
 242       struct pipe_texture templat;
 243       struct pipe_transfer *transfer;
 244       struct pipe_sampler_view view_templ;
 245       struct pipe_sampler_view *view;
 246       unsigned i;
 247
 248       memset( &templat, 0, sizeof( templat ) );
 249       templat.target = PIPE_TEXTURE_2D;
 250       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 251       templat.width0 = 1;
 252       templat.height0 = 1;
 253       templat.depth0 = 1;
 254       templat.last_level = 0;
 255
 256       st_ctx->default_texture = screen->texture_create( screen, &templat );
 257       if(st_ctx->default_texture) {
 258          transfer = screen->get_tex_transfer(screen,
 259                                              st_ctx->default_texture,
 260                                              0, 0, 0,
 261                                              PIPE_TRANSFER_WRITE,
 262                                              0, 0,
 263                                              st_ctx->default_texture->width0,
 264                                              st_ctx->default_texture->height0);
 265          if (transfer) {
 266             uint32_t *map;
 267             map = (uint32_t *) screen->transfer_map(screen, transfer);
 268             if(map) {
 269                *map = 0x00000000;
 270                screen->transfer_unmap(screen, transfer);
 271             }
 272             screen->tex_transfer_destroy(transfer);
 273          }
 274       }
 275
 276       u_sampler_view_default_template(&view_templ,
 277                                       st_ctx->default_texture,
 278                                       st_ctx->default_texture->format);
 279       view = st_ctx->pipe->create_sampler_view(st_ctx->pipe,
 280                                                st_ctx->default_texture,
 281                                                &view_templ);
 282
 283       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 284          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], view);
 285       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 286          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], view);
 287
 288       st_ctx->pipe->set_fragment_sampler_views(st_ctx->pipe,
 289                                                PIPE_MAX_SAMPLERS,
 290                                                st_ctx->fragment_sampler_views);
 291       st_ctx->pipe->set_vertex_sampler_views(st_ctx->pipe,
 292                                              PIPE_MAX_VERTEX_SAMPLERS,
 293                                              st_ctx->vertex_sampler_views);
 294
 295       pipe_sampler_view_reference(&view, NULL);
 296    }
 297
 298    /* vertex shader */
 299    {
 300       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 301                                       TGSI_SEMANTIC_GENERIC };
 302       const uint semantic_indexes[] = { 0, 0 };
 303       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 304                                                        2,
 305                                                        semantic_names,
 306                                                        semantic_indexes);
 307       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 308    }
 309
 310    /* fragment shader */
 311    {
 312       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 313       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 314    }
 315
 316    return st_ctx;
 317 }