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 "pipe/p_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_simple_shaders.h"
  37 #include "trace/tr_screen.h"
  38 #include "trace/tr_context.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 static struct st_device *
  79 st_device_create_from_st_winsys(const struct st_winsys *st_ws)
  80 {
  81    struct st_device *st_dev;
  82
  83    if(!st_ws->screen_create ||
  84       !st_ws->context_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_texture_reference(&st_ctx->fragment_sampler_textures[i], NULL);
 139       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 140          pipe_texture_reference(&st_ctx->vertex_sampler_textures[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->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
 162    if(!st_ctx->real_pipe) {
 163       st_context_destroy(st_ctx);
 164       return NULL;
 165    }
 166
 167    st_ctx->pipe = trace_context_create(st_dev->screen, st_ctx->real_pipe);
 168    if(!st_ctx->pipe) {
 169       st_context_destroy(st_ctx);
 170       return NULL;
 171    }
 172
 173    st_ctx->cso = cso_create_context(st_ctx->pipe);
 174    if(!st_ctx->cso) {
 175       st_context_destroy(st_ctx);
 176       return NULL;
 177    }
 178
 179    /* disabled blending/masking */
 180    {
 181       struct pipe_blend_state blend;
 182       memset(&blend, 0, sizeof(blend));
 183       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 184       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 185       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 186       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 187       blend.colormask = PIPE_MASK_RGBA;
 188       cso_set_blend(st_ctx->cso, &blend);
 189    }
 190
 191    /* no-op depth/stencil/alpha */
 192    {
 193       struct pipe_depth_stencil_alpha_state depthstencil;
 194       memset(&depthstencil, 0, sizeof(depthstencil));
 195       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 196    }
 197
 198    /* rasterizer */
 199    {
 200       struct pipe_rasterizer_state rasterizer;
 201       memset(&rasterizer, 0, sizeof(rasterizer));
 202       rasterizer.front_winding = PIPE_WINDING_CW;
 203       rasterizer.cull_mode = PIPE_WINDING_NONE;
 204       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 205    }
 206
 207    /* clip */
 208    {
 209       struct pipe_clip_state clip;
 210       memset(&clip, 0, sizeof(clip));
 211       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 212    }
 213
 214    /* identity viewport */
 215    {
 216       struct pipe_viewport_state viewport;
 217       viewport.scale[0] = 1.0;
 218       viewport.scale[1] = 1.0;
 219       viewport.scale[2] = 1.0;
 220       viewport.scale[3] = 1.0;
 221       viewport.translate[0] = 0.0;
 222       viewport.translate[1] = 0.0;
 223       viewport.translate[2] = 0.0;
 224       viewport.translate[3] = 0.0;
 225       cso_set_viewport(st_ctx->cso, &viewport);
 226    }
 227
 228    /* samplers */
 229    {
 230       struct pipe_sampler_state sampler;
 231       unsigned i;
 232       memset(&sampler, 0, sizeof(sampler));
 233       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 234       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 235       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 236       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 237       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 238       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 239       sampler.normalized_coords = 1;
 240       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 241          cso_single_sampler(st_ctx->cso, i, &sampler);
 242       cso_single_sampler_done(st_ctx->cso);
 243    }
 244
 245    /* default textures */
 246    {
 247       struct pipe_screen *screen = st_dev->screen;
 248       struct pipe_texture templat;
 249       struct pipe_transfer *transfer;
 250       unsigned i;
 251
 252       memset( &templat, 0, sizeof( templat ) );
 253       templat.target = PIPE_TEXTURE_2D;
 254       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 255       templat.width0 = 1;
 256       templat.height0 = 1;
 257       templat.depth0 = 1;
 258       templat.last_level = 0;
 259
 260       st_ctx->default_texture = screen->texture_create( screen, &templat );
 261       if(st_ctx->default_texture) {
 262          transfer = screen->get_tex_transfer(screen,
 263                                              st_ctx->default_texture,
 264                                              0, 0, 0,
 265                                              PIPE_TRANSFER_WRITE,
 266                                              0, 0,
 267                                              st_ctx->default_texture->width0,
 268                                              st_ctx->default_texture->height0);
 269          if (transfer) {
 270             uint32_t *map;
 271             map = (uint32_t *) screen->transfer_map(screen, transfer);
 272             if(map) {
 273                *map = 0x00000000;
 274                screen->transfer_unmap(screen, transfer);
 275             }
 276             screen->tex_transfer_destroy(transfer);
 277          }
 278       }
 279
 280       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 281          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], st_ctx->default_texture);
 282       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 283          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], st_ctx->default_texture);
 284
 285       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->fragment_sampler_textures);
 286       cso_set_vertex_sampler_textures(st_ctx->cso, PIPE_MAX_VERTEX_SAMPLERS, st_ctx->vertex_sampler_textures);
 287    }
 288
 289    /* vertex shader */
 290    {
 291       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 292                                       TGSI_SEMANTIC_GENERIC };
 293       const uint semantic_indexes[] = { 0, 0 };
 294       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 295                                                        2,
 296                                                        semantic_names,
 297                                                        semantic_indexes);
 298       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 299    }
 300
 301    /* fragment shader */
 302    {
 303       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 304       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 305    }
 306
 307    return st_ctx;
 308 }