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((struct pipe_reference **)ptr, &st_dev->reference))
  66       st_device_really_destroy(old_dev);
  67 }
  68
  69
  70 void
  71 st_device_destroy(struct st_device *st_dev)
  72 {
  73    st_device_reference(&st_dev, NULL);
  74 }
  75
  76
  77 static struct st_device *
  78 st_device_create_from_st_winsys(const struct st_winsys *st_ws)
  79 {
  80    struct st_device *st_dev;
  81
  82    if(!st_ws->screen_create ||
  83       !st_ws->context_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->sampler_textures[i], NULL);
 138       pipe_texture_reference(&st_ctx->default_texture, NULL);
 139
 140       FREE(st_ctx);
 141
 142       st_device_reference(&st_dev, NULL);
 143    }
 144 }
 145
 146
 147 struct st_context *
 148 st_context_create(struct st_device *st_dev)
 149 {
 150    struct st_context *st_ctx;
 151
 152    st_ctx = CALLOC_STRUCT(st_context);
 153    if(!st_ctx)
 154       return NULL;
 155
 156    st_device_reference(&st_ctx->st_dev, st_dev);
 157
 158    st_ctx->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
 159    if(!st_ctx->real_pipe) {
 160       st_context_destroy(st_ctx);
 161       return NULL;
 162    }
 163
 164    st_ctx->pipe = trace_context_create(st_dev->screen, st_ctx->real_pipe);
 165    if(!st_ctx->pipe) {
 166       st_context_destroy(st_ctx);
 167       return NULL;
 168    }
 169
 170    st_ctx->cso = cso_create_context(st_ctx->pipe);
 171    if(!st_ctx->cso) {
 172       st_context_destroy(st_ctx);
 173       return NULL;
 174    }
 175
 176    /* disabled blending/masking */
 177    {
 178       struct pipe_blend_state blend;
 179       memset(&blend, 0, sizeof(blend));
 180       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 181       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 182       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 183       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 184       blend.colormask = PIPE_MASK_RGBA;
 185       cso_set_blend(st_ctx->cso, &blend);
 186    }
 187
 188    /* no-op depth/stencil/alpha */
 189    {
 190       struct pipe_depth_stencil_alpha_state depthstencil;
 191       memset(&depthstencil, 0, sizeof(depthstencil));
 192       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 193    }
 194
 195    /* rasterizer */
 196    {
 197       struct pipe_rasterizer_state rasterizer;
 198       memset(&rasterizer, 0, sizeof(rasterizer));
 199       rasterizer.front_winding = PIPE_WINDING_CW;
 200       rasterizer.cull_mode = PIPE_WINDING_NONE;
 201       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 202    }
 203
 204    /* clip */
 205    {
 206       struct pipe_clip_state clip;
 207       memset(&clip, 0, sizeof(clip));
 208       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 209    }
 210
 211    /* identity viewport */
 212    {
 213       struct pipe_viewport_state viewport;
 214       viewport.scale[0] = 1.0;
 215       viewport.scale[1] = 1.0;
 216       viewport.scale[2] = 1.0;
 217       viewport.scale[3] = 1.0;
 218       viewport.translate[0] = 0.0;
 219       viewport.translate[1] = 0.0;
 220       viewport.translate[2] = 0.0;
 221       viewport.translate[3] = 0.0;
 222       cso_set_viewport(st_ctx->cso, &viewport);
 223    }
 224
 225    /* samplers */
 226    {
 227       struct pipe_sampler_state sampler;
 228       unsigned i;
 229       memset(&sampler, 0, sizeof(sampler));
 230       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 231       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 232       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 233       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 234       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 235       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 236       sampler.normalized_coords = 1;
 237       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 238          cso_single_sampler(st_ctx->cso, i, &sampler);
 239       cso_single_sampler_done(st_ctx->cso);
 240    }
 241
 242    /* default textures */
 243    {
 244       struct pipe_screen *screen = st_dev->screen;
 245       struct pipe_texture templat;
 246       struct pipe_transfer *transfer;
 247       unsigned i;
 248
 249       memset( &templat, 0, sizeof( templat ) );
 250       templat.target = PIPE_TEXTURE_2D;
 251       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 252       templat.block.size = 4;
 253       templat.block.width = 1;
 254       templat.block.height = 1;
 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->sampler_textures[i], st_ctx->default_texture);
 282
 283       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
 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 }