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_public.h"
  39
  40 #include "st_device.h"
  41 #include "st_winsys.h"
  42
  43
  44 static void
  45 st_device_really_destroy(struct st_device *st_dev)
  46 {
  47    if(st_dev->screen) {
  48       /* FIXME: Don't really destroy until we keep track of every single
  49        * reference or we end up causing a segmentation fault every time
  50        * python exits. */
  51 #if 0
  52       st_dev->screen->destroy(st_dev->screen);
  53 #endif
  54    }
  55
  56    FREE(st_dev);
  57 }
  58
  59
  60 static void
  61 st_device_reference(struct st_device **ptr, struct st_device *st_dev)
  62 {
  63    struct st_device *old_dev = *ptr;
  64
  65    if (pipe_reference(&(*ptr)->reference, &st_dev->reference))
  66       st_device_really_destroy(old_dev);
  67    *ptr = st_dev;
  68 }
  69
  70
  71 void
  72 st_device_destroy(struct st_device *st_dev)
  73 {
  74    st_device_reference(&st_dev, NULL);
  75 }
  76
  77
  78 struct st_device *
  79 st_device_create(boolean hardware)
  80 {
  81    struct pipe_screen *screen;
  82    struct st_device *st_dev;
  83
  84    if (hardware)
  85       screen = st_hardware_screen_create();
  86    else
  87       screen = st_software_screen_create("softpipe");
  88
  89    screen = trace_screen_create(screen);
  90    if (!screen)
  91       goto no_screen;
  92
  93    st_dev = CALLOC_STRUCT(st_device);
  94    if (!st_dev)
  95       goto no_device;
  96
  97    pipe_reference_init(&st_dev->reference, 1);
  98    st_dev->screen = screen;
  99
 100    return st_dev;
 101
 102 no_device:
 103    screen->destroy(screen);
 104 no_screen:
 105    return NULL;
 106 }
 107
 108
 109 void
 110 st_context_destroy(struct st_context *st_ctx)
 111 {
 112    unsigned i;
 113
 114    if(st_ctx) {
 115       struct st_device *st_dev = st_ctx->st_dev;
 116
 117       if(st_ctx->cso) {
 118          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 119          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 120
 121          cso_destroy_context(st_ctx->cso);
 122       }
 123
 124       if(st_ctx->pipe)
 125          st_ctx->pipe->destroy(st_ctx->pipe);
 126
 127       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 128          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], NULL);
 129       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 130          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], NULL);
 131       pipe_resource_reference(&st_ctx->default_texture, NULL);
 132
 133       FREE(st_ctx);
 134
 135       st_device_reference(&st_dev, NULL);
 136    }
 137 }
 138
 139
 140 struct st_context *
 141 st_context_create(struct st_device *st_dev)
 142 {
 143    struct st_context *st_ctx;
 144
 145    st_ctx = CALLOC_STRUCT(st_context);
 146    if(!st_ctx)
 147       return NULL;
 148
 149    st_device_reference(&st_ctx->st_dev, st_dev);
 150
 151    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 152    if(!st_ctx->pipe) {
 153       st_context_destroy(st_ctx);
 154       return NULL;
 155    }
 156
 157    st_ctx->cso = cso_create_context(st_ctx->pipe);
 158    if(!st_ctx->cso) {
 159       st_context_destroy(st_ctx);
 160       return NULL;
 161    }
 162
 163    /* disabled blending/masking */
 164    {
 165       struct pipe_blend_state blend;
 166       memset(&blend, 0, sizeof(blend));
 167       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 168       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 169       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 170       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 171       blend.rt[0].colormask = PIPE_MASK_RGBA;
 172       cso_set_blend(st_ctx->cso, &blend);
 173    }
 174
 175    /* no-op depth/stencil/alpha */
 176    {
 177       struct pipe_depth_stencil_alpha_state depthstencil;
 178       memset(&depthstencil, 0, sizeof(depthstencil));
 179       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 180    }
 181
 182    /* rasterizer */
 183    {
 184       struct pipe_rasterizer_state rasterizer;
 185       memset(&rasterizer, 0, sizeof(rasterizer));
 186       rasterizer.cull_face = PIPE_FACE_NONE;
 187       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 188    }
 189
 190    /* clip */
 191    {
 192       struct pipe_clip_state clip;
 193       memset(&clip, 0, sizeof(clip));
 194       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 195    }
 196
 197    /* identity viewport */
 198    {
 199       struct pipe_viewport_state viewport;
 200       viewport.scale[0] = 1.0;
 201       viewport.scale[1] = 1.0;
 202       viewport.scale[2] = 1.0;
 203       viewport.scale[3] = 1.0;
 204       viewport.translate[0] = 0.0;
 205       viewport.translate[1] = 0.0;
 206       viewport.translate[2] = 0.0;
 207       viewport.translate[3] = 0.0;
 208       cso_set_viewport(st_ctx->cso, &viewport);
 209    }
 210
 211    /* samplers */
 212    {
 213       struct pipe_sampler_state sampler;
 214       unsigned i;
 215       memset(&sampler, 0, sizeof(sampler));
 216       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 217       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 218       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 219       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 220       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 221       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 222       sampler.normalized_coords = 1;
 223       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 224          cso_single_sampler(st_ctx->cso, i, &sampler);
 225       cso_single_sampler_done(st_ctx->cso);
 226    }
 227
 228    /* default textures */
 229    {
 230       struct pipe_context *pipe = st_ctx->pipe;
 231       struct pipe_screen *screen = st_dev->screen;
 232       struct pipe_resource templat;
 233       struct pipe_sampler_view view_templ;
 234       struct pipe_sampler_view *view;
 235       unsigned i;
 236
 237       memset( &templat, 0, sizeof( templat ) );
 238       templat.target = PIPE_TEXTURE_2D;
 239       templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 240       templat.width0 = 1;
 241       templat.height0 = 1;
 242       templat.depth0 = 1;
 243       templat.last_level = 0;
 244       templat.bind = PIPE_BIND_SAMPLER_VIEW;
 245
 246       st_ctx->default_texture = screen->resource_create( screen, &templat );
 247       if(st_ctx->default_texture) {
 248          struct pipe_box box;
 249          uint32_t zero = 0;
 250
 251          u_box_origin_2d( 1, 1, &box );
 252
 253          pipe->transfer_inline_write(pipe,
 254                                      st_ctx->default_texture,
 255                                      u_subresource(0,0),
 256                                      PIPE_TRANSFER_WRITE,
 257                                      &box,
 258                                      &zero,
 259                                      sizeof zero,
 260                                      0);
 261       }
 262
 263       u_sampler_view_default_template(&view_templ,
 264                                       st_ctx->default_texture,
 265                                       st_ctx->default_texture->format);
 266       view = st_ctx->pipe->create_sampler_view(st_ctx->pipe,
 267                                                st_ctx->default_texture,
 268                                                &view_templ);
 269
 270       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 271          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], view);
 272       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 273          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], view);
 274
 275       st_ctx->pipe->set_fragment_sampler_views(st_ctx->pipe,
 276                                                PIPE_MAX_SAMPLERS,
 277                                                st_ctx->fragment_sampler_views);
 278       st_ctx->pipe->set_vertex_sampler_views(st_ctx->pipe,
 279                                              PIPE_MAX_VERTEX_SAMPLERS,
 280                                              st_ctx->vertex_sampler_views);
 281
 282       pipe_sampler_view_reference(&view, NULL);
 283    }
 284
 285    /* vertex shader */
 286    {
 287       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 288                                       TGSI_SEMANTIC_GENERIC };
 289       const uint semantic_indexes[] = { 0, 0 };
 290       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 291                                                        2,
 292                                                        semantic_names,
 293                                                        semantic_indexes);
 294       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 295    }
 296
 297    /* fragment shader */
 298    {
 299       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 300       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 301    }
 302
 303    return st_ctx;
 304 }