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->sampler_textures[i], NULL);
 139       pipe_texture_reference(&st_ctx->default_texture, NULL);
 140
 141       FREE(st_ctx);
 142
 143       st_device_reference(&st_dev, NULL);
 144    }
 145 }
 146
 147
 148 struct st_context *
 149 st_context_create(struct st_device *st_dev)
 150 {
 151    struct st_context *st_ctx;
 152
 153    st_ctx = CALLOC_STRUCT(st_context);
 154    if(!st_ctx)
 155       return NULL;
 156
 157    st_device_reference(&st_ctx->st_dev, st_dev);
 158
 159    st_ctx->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
 160    if(!st_ctx->real_pipe) {
 161       st_context_destroy(st_ctx);
 162       return NULL;
 163    }
 164
 165    st_ctx->pipe = trace_context_create(st_dev->screen, st_ctx->real_pipe);
 166    if(!st_ctx->pipe) {
 167       st_context_destroy(st_ctx);
 168       return NULL;
 169    }
 170
 171    st_ctx->cso = cso_create_context(st_ctx->pipe);
 172    if(!st_ctx->cso) {
 173       st_context_destroy(st_ctx);
 174       return NULL;
 175    }
 176
 177    /* disabled blending/masking */
 178    {
 179       struct pipe_blend_state blend;
 180       memset(&blend, 0, sizeof(blend));
 181       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 182       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 183       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 184       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 185       blend.colormask = PIPE_MASK_RGBA;
 186       cso_set_blend(st_ctx->cso, &blend);
 187    }
 188
 189    /* no-op depth/stencil/alpha */
 190    {
 191       struct pipe_depth_stencil_alpha_state depthstencil;
 192       memset(&depthstencil, 0, sizeof(depthstencil));
 193       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 194    }
 195
 196    /* rasterizer */
 197    {
 198       struct pipe_rasterizer_state rasterizer;
 199       memset(&rasterizer, 0, sizeof(rasterizer));
 200       rasterizer.front_winding = PIPE_WINDING_CW;
 201       rasterizer.cull_mode = PIPE_WINDING_NONE;
 202       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 203    }
 204
 205    /* clip */
 206    {
 207       struct pipe_clip_state clip;
 208       memset(&clip, 0, sizeof(clip));
 209       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 210    }
 211
 212    /* identity viewport */
 213    {
 214       struct pipe_viewport_state viewport;
 215       viewport.scale[0] = 1.0;
 216       viewport.scale[1] = 1.0;
 217       viewport.scale[2] = 1.0;
 218       viewport.scale[3] = 1.0;
 219       viewport.translate[0] = 0.0;
 220       viewport.translate[1] = 0.0;
 221       viewport.translate[2] = 0.0;
 222       viewport.translate[3] = 0.0;
 223       cso_set_viewport(st_ctx->cso, &viewport);
 224    }
 225
 226    /* samplers */
 227    {
 228       struct pipe_sampler_state sampler;
 229       unsigned i;
 230       memset(&sampler, 0, sizeof(sampler));
 231       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 232       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 233       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 234       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 235       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 236       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 237       sampler.normalized_coords = 1;
 238       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 239          cso_single_sampler(st_ctx->cso, i, &sampler);
 240       cso_single_sampler_done(st_ctx->cso);
 241    }
 242
 243    /* default textures */
 244    {
 245       struct pipe_screen *screen = st_dev->screen;
 246       struct pipe_texture templat;
 247       struct pipe_transfer *transfer;
 248       unsigned i;
 249
 250       memset( &templat, 0, sizeof( templat ) );
 251       templat.target = PIPE_TEXTURE_2D;
 252       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 253       templat.width0 = 1;
 254       templat.height0 = 1;
 255       templat.depth0 = 1;
 256       templat.last_level = 0;
 257
 258       st_ctx->default_texture = screen->texture_create( screen, &templat );
 259       if(st_ctx->default_texture) {
 260          transfer = screen->get_tex_transfer(screen,
 261                                              st_ctx->default_texture,
 262                                              0, 0, 0,
 263                                              PIPE_TRANSFER_WRITE,
 264                                              0, 0,
 265                                              st_ctx->default_texture->width0,
 266                                              st_ctx->default_texture->height0);
 267          if (transfer) {
 268             uint32_t *map;
 269             map = (uint32_t *) screen->transfer_map(screen, transfer);
 270             if(map) {
 271                *map = 0x00000000;
 272                screen->transfer_unmap(screen, transfer);
 273             }
 274             screen->tex_transfer_destroy(transfer);
 275          }
 276       }
 277
 278       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 279          pipe_texture_reference(&st_ctx->sampler_textures[i], st_ctx->default_texture);
 280
 281       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
 282    }
 283
 284    /* vertex shader */
 285    {
 286       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 287                                       TGSI_SEMANTIC_GENERIC };
 288       const uint semantic_indexes[] = { 0, 0 };
 289       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 290                                                        2,
 291                                                        semantic_names,
 292                                                        semantic_indexes);
 293       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 294    }
 295
 296    /* fragment shader */
 297    {
 298       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 299       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 300    }
 301
 302    return st_ctx;
 303 }