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_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       return NULL;
  85
  86    st_dev = CALLOC_STRUCT(st_device);
  87    if(!st_dev)
  88       return NULL;
  89
  90    pipe_reference_init(&st_dev->reference, 1);
  91    st_dev->st_ws = st_ws;
  92
  93    st_dev->real_screen = st_ws->screen_create();
  94    if(!st_dev->real_screen) {
  95       st_device_destroy(st_dev);
  96       return NULL;
  97    }
  98
  99    st_dev->screen = trace_screen_create(st_dev->real_screen);
 100    if(!st_dev->screen) {
 101       st_device_destroy(st_dev);
 102       return NULL;
 103    }
 104
 105    return st_dev;
 106 }
 107
 108
 109 struct st_device *
 110 st_device_create(boolean hardware) {
 111    if(hardware)
 112       return st_device_create_from_st_winsys(&st_hardpipe_winsys);
 113    else
 114       return st_device_create_from_st_winsys(&st_softpipe_winsys);
 115 }
 116
 117
 118 void
 119 st_context_destroy(struct st_context *st_ctx)
 120 {
 121    unsigned i;
 122
 123    if(st_ctx) {
 124       struct st_device *st_dev = st_ctx->st_dev;
 125
 126       if(st_ctx->cso) {
 127          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 128          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 129
 130          cso_destroy_context(st_ctx->cso);
 131       }
 132
 133       if(st_ctx->pipe)
 134          st_ctx->pipe->destroy(st_ctx->pipe);
 135
 136       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 137          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], NULL);
 138       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 139          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], NULL);
 140       pipe_texture_reference(&st_ctx->default_texture, NULL);
 141
 142       FREE(st_ctx);
 143
 144       st_device_reference(&st_dev, NULL);
 145    }
 146 }
 147
 148
 149 struct st_context *
 150 st_context_create(struct st_device *st_dev)
 151 {
 152    struct st_context *st_ctx;
 153
 154    st_ctx = CALLOC_STRUCT(st_context);
 155    if(!st_ctx)
 156       return NULL;
 157
 158    st_device_reference(&st_ctx->st_dev, st_dev);
 159
 160    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 161    if(!st_ctx->pipe) {
 162       st_context_destroy(st_ctx);
 163       return NULL;
 164    }
 165
 166    st_ctx->cso = cso_create_context(st_ctx->pipe);
 167    if(!st_ctx->cso) {
 168       st_context_destroy(st_ctx);
 169       return NULL;
 170    }
 171
 172    /* disabled blending/masking */
 173    {
 174       struct pipe_blend_state blend;
 175       memset(&blend, 0, sizeof(blend));
 176       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 177       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 178       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 179       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 180       blend.rt[0].colormask = PIPE_MASK_RGBA;
 181       cso_set_blend(st_ctx->cso, &blend);
 182    }
 183
 184    /* no-op depth/stencil/alpha */
 185    {
 186       struct pipe_depth_stencil_alpha_state depthstencil;
 187       memset(&depthstencil, 0, sizeof(depthstencil));
 188       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 189    }
 190
 191    /* rasterizer */
 192    {
 193       struct pipe_rasterizer_state rasterizer;
 194       memset(&rasterizer, 0, sizeof(rasterizer));
 195       rasterizer.front_winding = PIPE_WINDING_CW;
 196       rasterizer.cull_mode = PIPE_WINDING_NONE;
 197       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 198    }
 199
 200    /* clip */
 201    {
 202       struct pipe_clip_state clip;
 203       memset(&clip, 0, sizeof(clip));
 204       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 205    }
 206
 207    /* identity viewport */
 208    {
 209       struct pipe_viewport_state viewport;
 210       viewport.scale[0] = 1.0;
 211       viewport.scale[1] = 1.0;
 212       viewport.scale[2] = 1.0;
 213       viewport.scale[3] = 1.0;
 214       viewport.translate[0] = 0.0;
 215       viewport.translate[1] = 0.0;
 216       viewport.translate[2] = 0.0;
 217       viewport.translate[3] = 0.0;
 218       cso_set_viewport(st_ctx->cso, &viewport);
 219    }
 220
 221    /* samplers */
 222    {
 223       struct pipe_sampler_state sampler;
 224       unsigned i;
 225       memset(&sampler, 0, sizeof(sampler));
 226       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 227       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 228       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 229       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 230       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 231       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 232       sampler.normalized_coords = 1;
 233       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 234          cso_single_sampler(st_ctx->cso, i, &sampler);
 235       cso_single_sampler_done(st_ctx->cso);
 236    }
 237
 238    /* default textures */
 239    {
 240       struct pipe_screen *screen = st_dev->screen;
 241       struct pipe_texture templat;
 242       struct pipe_transfer *transfer;
 243       unsigned i;
 244
 245       memset( &templat, 0, sizeof( templat ) );
 246       templat.target = PIPE_TEXTURE_2D;
 247       templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 248       templat.width0 = 1;
 249       templat.height0 = 1;
 250       templat.depth0 = 1;
 251       templat.last_level = 0;
 252
 253       st_ctx->default_texture = screen->texture_create( screen, &templat );
 254       if(st_ctx->default_texture) {
 255          transfer = screen->get_tex_transfer(screen,
 256                                              st_ctx->default_texture,
 257                                              0, 0, 0,
 258                                              PIPE_TRANSFER_WRITE,
 259                                              0, 0,
 260                                              st_ctx->default_texture->width0,
 261                                              st_ctx->default_texture->height0);
 262          if (transfer) {
 263             uint32_t *map;
 264             map = (uint32_t *) screen->transfer_map(screen, transfer);
 265             if(map) {
 266                *map = 0x00000000;
 267                screen->transfer_unmap(screen, transfer);
 268             }
 269             screen->tex_transfer_destroy(transfer);
 270          }
 271       }
 272
 273       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 274          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], st_ctx->default_texture);
 275       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 276          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], st_ctx->default_texture);
 277
 278       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->fragment_sampler_textures);
 279       cso_set_vertex_sampler_textures(st_ctx->cso, PIPE_MAX_VERTEX_SAMPLERS, st_ctx->vertex_sampler_textures);
 280    }
 281
 282    /* vertex shader */
 283    {
 284       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 285                                       TGSI_SEMANTIC_GENERIC };
 286       const uint semantic_indexes[] = { 0, 0 };
 287       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 288                                                        2,
 289                                                        semantic_names,
 290                                                        semantic_indexes);
 291       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 292    }
 293
 294    /* fragment shader */
 295    {
 296       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 297       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 298    }
 299
 300    return st_ctx;
 301 }