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();
  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_texture_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.front_winding = PIPE_WINDING_CW;
 187       rasterizer.cull_mode = PIPE_WINDING_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_screen *screen = st_dev->screen;
 232       struct pipe_texture templat;
 233       struct pipe_transfer *transfer;
 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
 246       st_ctx->default_texture = screen->texture_create( screen, &templat );
 247       if(st_ctx->default_texture) {
 248          transfer = screen->get_tex_transfer(screen,
 249                                              st_ctx->default_texture,
 250                                              0, 0, 0,
 251                                              PIPE_TRANSFER_WRITE,
 252                                              0, 0,
 253                                              st_ctx->default_texture->width0,
 254                                              st_ctx->default_texture->height0);
 255          if (transfer) {
 256             uint32_t *map;
 257             map = (uint32_t *) screen->transfer_map(screen, transfer);
 258             if(map) {
 259                *map = 0x00000000;
 260                screen->transfer_unmap(screen, transfer);
 261             }
 262             screen->tex_transfer_destroy(transfer);
 263          }
 264       }
 265
 266       u_sampler_view_default_template(&view_templ,
 267                                       st_ctx->default_texture,
 268                                       st_ctx->default_texture->format);
 269       view = st_ctx->pipe->create_sampler_view(st_ctx->pipe,
 270                                                st_ctx->default_texture,
 271                                                &view_templ);
 272
 273       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 274          pipe_sampler_view_reference(&st_ctx->fragment_sampler_views[i], view);
 275       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 276          pipe_sampler_view_reference(&st_ctx->vertex_sampler_views[i], view);
 277
 278       st_ctx->pipe->set_fragment_sampler_views(st_ctx->pipe,
 279                                                PIPE_MAX_SAMPLERS,
 280                                                st_ctx->fragment_sampler_views);
 281       st_ctx->pipe->set_vertex_sampler_views(st_ctx->pipe,
 282                                              PIPE_MAX_VERTEX_SAMPLERS,
 283                                              st_ctx->vertex_sampler_views);
 284
 285       pipe_sampler_view_reference(&view, NULL);
 286    }
 287
 288    /* vertex shader */
 289    {
 290       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 291                                       TGSI_SEMANTIC_GENERIC };
 292       const uint semantic_indexes[] = { 0, 0 };
 293       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 294                                                        2,
 295                                                        semantic_names,
 296                                                        semantic_indexes);
 297       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 298    }
 299
 300    /* fragment shader */
 301    {
 302       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 303       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 304    }
 305
 306    return st_ctx;
 307 }