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_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_sampler.h"
  38 #include "util/u_simple_shaders.h"
  39 #include "trace/tr_public.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 struct st_device *
  80 st_device_create(boolean hardware)
  81 {
  82    struct pipe_screen *screen;
  83    struct st_device *st_dev;
  84
  85    if (hardware)
  86       screen = st_hardware_screen_create();
  87    else
  88       screen = st_software_screen_create("softpipe");
  89
  90    screen = trace_screen_create(screen);
  91    if (!screen)
  92       goto no_screen;
  93
  94    st_dev = CALLOC_STRUCT(st_device);
  95    if (!st_dev)
  96       goto no_device;
  97
  98    pipe_reference_init(&st_dev->reference, 1);
  99    st_dev->screen = screen;
 100
 101    return st_dev;
 102
 103 no_device:
 104    screen->destroy(screen);
 105 no_screen:
 106    return NULL;
 107 }
 108
 109
 110 void
 111 st_context_destroy(struct st_context *st_ctx)
 112 {
 113    unsigned i;
 114
 115    if(st_ctx) {
 116       struct st_device *st_dev = st_ctx->st_dev;
 117
 118       if(st_ctx->cso) {
 119          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 120          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 121
 122          cso_destroy_context(st_ctx->cso);
 123       }
 124
 125       if(st_ctx->pipe)
 126          st_ctx->pipe->destroy(st_ctx->pipe);
 127
 128       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 129          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], NULL);
 130       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 131          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], NULL);
 132       pipe_resource_reference(&st_ctx->default_texture, NULL);
 133
 134       FREE(st_ctx);
 135
 136       st_device_reference(&st_dev, NULL);
 137    }
 138 }
 139
 140
 141 struct st_context *
 142 st_context_create(struct st_device *st_dev)
 143 {
 144    struct st_context *st_ctx;
 145
 146    st_ctx = CALLOC_STRUCT(st_context);
 147    if(!st_ctx)
 148       return NULL;
 149
 150    st_device_reference(&st_ctx->st_dev, st_dev);
 151
 152    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 153    if(!st_ctx->pipe) {
 154       st_context_destroy(st_ctx);
 155       return NULL;
 156    }
 157
 158    st_ctx->cso = cso_create_context(st_ctx->pipe);
 159    if(!st_ctx->cso) {
 160       st_context_destroy(st_ctx);
 161       return NULL;
 162    }
 163
 164    /* disabled blending/masking */
 165    {
 166       struct pipe_blend_state blend;
 167       memset(&blend, 0, sizeof(blend));
 168       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 169       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 170       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 171       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 172       blend.rt[0].colormask = PIPE_MASK_RGBA;
 173       cso_set_blend(st_ctx->cso, &blend);
 174    }
 175
 176    /* no-op depth/stencil/alpha */
 177    {
 178       struct pipe_depth_stencil_alpha_state depthstencil;
 179       memset(&depthstencil, 0, sizeof(depthstencil));
 180       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 181    }
 182
 183    /* rasterizer */
 184    {
 185       struct pipe_rasterizer_state rasterizer;
 186       memset(&rasterizer, 0, sizeof(rasterizer));
 187       rasterizer.cull_face = PIPE_FACE_NONE;
 188       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 189    }
 190
 191    /* clip */
 192    {
 193       struct pipe_clip_state clip;
 194       memset(&clip, 0, sizeof(clip));
 195       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 196    }
 197
 198    /* identity viewport */
 199    {
 200       struct pipe_viewport_state viewport;
 201       viewport.scale[0] = 1.0;
 202       viewport.scale[1] = 1.0;
 203       viewport.scale[2] = 1.0;
 204       viewport.scale[3] = 1.0;
 205       viewport.translate[0] = 0.0;
 206       viewport.translate[1] = 0.0;
 207       viewport.translate[2] = 0.0;
 208       viewport.translate[3] = 0.0;
 209       cso_set_viewport(st_ctx->cso, &viewport);
 210    }
 211
 212    /* samplers */
 213    {
 214       struct pipe_sampler_state sampler;
 215       unsigned i;
 216       memset(&sampler, 0, sizeof(sampler));
 217       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 218       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 219       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 220       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 221       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 222       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 223       sampler.normalized_coords = 1;
 224       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 225          cso_single_sampler(st_ctx->cso, i, &sampler);
 226       cso_single_sampler_done(st_ctx->cso);
 227    }
 228
 229    /* default textures */
 230    {
 231       struct pipe_context *pipe = st_ctx->pipe;
 232       struct pipe_screen *screen = st_dev->screen;
 233       struct pipe_resource templat;
 234       struct pipe_sampler_view view_templ;
 235       struct pipe_sampler_view *view;
 236       unsigned i;
 237
 238       memset( &templat, 0, sizeof( templat ) );
 239       templat.target = PIPE_TEXTURE_2D;
 240       templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 241       templat.width0 = 1;
 242       templat.height0 = 1;
 243       templat.depth0 = 1;
 244       templat.last_level = 0;
 245       templat.bind = PIPE_BIND_SAMPLER_VIEW;
 246
 247       st_ctx->default_texture = screen->resource_create( screen, &templat );
 248       if(st_ctx->default_texture) {
 249          struct pipe_box box;
 250          uint32_t zero = 0;
 251
 252          u_box_origin_2d( 1, 1, &box );
 253
 254          pipe->transfer_inline_write(pipe,
 255                                      st_ctx->default_texture,
 256                                      u_subresource(0,0),
 257                                      PIPE_TRANSFER_WRITE,
 258                                      &box,
 259                                      &zero,
 260                                      sizeof zero,
 261                                      0);
 262       }
 263
 264       u_sampler_view_default_template(&view_templ,
 265                                       st_ctx->default_texture,
 266                                       st_ctx->default_texture->format);
 267       view = st_ctx->pipe->create_sampler_view(st_ctx->pipe,
 268                                                st_ctx->default_texture,
 269                                                &view_templ);
 270
 271       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 272          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], view);
 273       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 274          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], view);
 275
 276       st_ctx->pipe->set_fragment_sampler_views(st_ctx->pipe,
 277                                                PIPE_MAX_SAMPLERS,
 278                                                st_ctx->fragment_sampler_views);
 279       st_ctx->pipe->set_vertex_sampler_views(st_ctx->pipe,
 280                                              PIPE_MAX_VERTEX_SAMPLERS,
 281                                              st_ctx->vertex_sampler_views);
 282
 283       pipe_sampler_view_reference(&view, NULL);
 284    }
 285
 286    /* vertex shader */
 287    {
 288       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 289                                       TGSI_SEMANTIC_GENERIC };
 290       const uint semantic_indexes[] = { 0, 0 };
 291       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 292                                                        2,
 293                                                        semantic_names,
 294                                                        semantic_indexes);
 295       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 296    }
 297
 298    /* fragment shader */
 299    {
 300       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 301       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 302    }
 303
 304    return st_ctx;
 305 }