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_public.h"
  38
  39 #include "st_device.h"
  40 #include "st_winsys.h"
  41
  42
  43 static void
  44 st_device_really_destroy(struct st_device *st_dev)
  45 {
  46    if(st_dev->screen) {
  47       /* FIXME: Don't really destroy until we keep track of every single
  48        * reference or we end up causing a segmentation fault every time
  49        * python exits. */
  50 #if 0
  51       st_dev->screen->destroy(st_dev->screen);
  52 #endif
  53    }
  54
  55    FREE(st_dev);
  56 }
  57
  58
  59 static void
  60 st_device_reference(struct st_device **ptr, struct st_device *st_dev)
  61 {
  62    struct st_device *old_dev = *ptr;
  63
  64    if (pipe_reference(&(*ptr)->reference, &st_dev->reference))
  65       st_device_really_destroy(old_dev);
  66    *ptr = st_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 struct st_device *
  78 st_device_create(boolean hardware)
  79 {
  80    struct pipe_screen *screen;
  81    struct st_device *st_dev;
  82
  83    if (hardware)
  84       screen = st_hardware_screen_create();
  85    else
  86       screen = st_software_screen_create();
  87
  88    screen = trace_screen_create(screen);
  89    if (!screen)
  90       goto no_screen;
  91
  92    st_dev = CALLOC_STRUCT(st_device);
  93    if (!st_dev)
  94       goto no_device;
  95
  96    pipe_reference_init(&st_dev->reference, 1);
  97    st_dev->screen = screen;
  98
  99    return st_dev;
 100
 101 no_device:
 102    screen->destroy(screen);
 103 no_screen:
 104    return NULL;
 105 }
 106
 107
 108 void
 109 st_context_destroy(struct st_context *st_ctx)
 110 {
 111    unsigned i;
 112
 113    if(st_ctx) {
 114       struct st_device *st_dev = st_ctx->st_dev;
 115
 116       if(st_ctx->cso) {
 117          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 118          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 119
 120          cso_destroy_context(st_ctx->cso);
 121       }
 122
 123       if(st_ctx->pipe)
 124          st_ctx->pipe->destroy(st_ctx->pipe);
 125
 126       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 127          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], NULL);
 128       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 129          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], NULL);
 130       pipe_texture_reference(&st_ctx->default_texture, NULL);
 131
 132       FREE(st_ctx);
 133
 134       st_device_reference(&st_dev, NULL);
 135    }
 136 }
 137
 138
 139 struct st_context *
 140 st_context_create(struct st_device *st_dev)
 141 {
 142    struct st_context *st_ctx;
 143
 144    st_ctx = CALLOC_STRUCT(st_context);
 145    if(!st_ctx)
 146       return NULL;
 147
 148    st_device_reference(&st_ctx->st_dev, st_dev);
 149
 150    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 151    if(!st_ctx->pipe) {
 152       st_context_destroy(st_ctx);
 153       return NULL;
 154    }
 155
 156    st_ctx->cso = cso_create_context(st_ctx->pipe);
 157    if(!st_ctx->cso) {
 158       st_context_destroy(st_ctx);
 159       return NULL;
 160    }
 161
 162    /* disabled blending/masking */
 163    {
 164       struct pipe_blend_state blend;
 165       memset(&blend, 0, sizeof(blend));
 166       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 167       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 168       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 169       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 170       blend.rt[0].colormask = PIPE_MASK_RGBA;
 171       cso_set_blend(st_ctx->cso, &blend);
 172    }
 173
 174    /* no-op depth/stencil/alpha */
 175    {
 176       struct pipe_depth_stencil_alpha_state depthstencil;
 177       memset(&depthstencil, 0, sizeof(depthstencil));
 178       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 179    }
 180
 181    /* rasterizer */
 182    {
 183       struct pipe_rasterizer_state rasterizer;
 184       memset(&rasterizer, 0, sizeof(rasterizer));
 185       rasterizer.front_winding = PIPE_WINDING_CW;
 186       rasterizer.cull_mode = PIPE_WINDING_NONE;
 187       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 188    }
 189
 190    /* clip */
 191    {
 192       struct pipe_clip_state clip;
 193       memset(&clip, 0, sizeof(clip));
 194       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 195    }
 196
 197    /* identity viewport */
 198    {
 199       struct pipe_viewport_state viewport;
 200       viewport.scale[0] = 1.0;
 201       viewport.scale[1] = 1.0;
 202       viewport.scale[2] = 1.0;
 203       viewport.scale[3] = 1.0;
 204       viewport.translate[0] = 0.0;
 205       viewport.translate[1] = 0.0;
 206       viewport.translate[2] = 0.0;
 207       viewport.translate[3] = 0.0;
 208       cso_set_viewport(st_ctx->cso, &viewport);
 209    }
 210
 211    /* samplers */
 212    {
 213       struct pipe_sampler_state sampler;
 214       unsigned i;
 215       memset(&sampler, 0, sizeof(sampler));
 216       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 217       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 218       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 219       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 220       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 221       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 222       sampler.normalized_coords = 1;
 223       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 224          cso_single_sampler(st_ctx->cso, i, &sampler);
 225       cso_single_sampler_done(st_ctx->cso);
 226    }
 227
 228    /* default textures */
 229    {
 230       struct pipe_screen *screen = st_dev->screen;
 231       struct pipe_texture templat;
 232       struct pipe_transfer *transfer;
 233       unsigned i;
 234
 235       memset( &templat, 0, sizeof( templat ) );
 236       templat.target = PIPE_TEXTURE_2D;
 237       templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 238       templat.width0 = 1;
 239       templat.height0 = 1;
 240       templat.depth0 = 1;
 241       templat.last_level = 0;
 242
 243       st_ctx->default_texture = screen->texture_create( screen, &templat );
 244       if(st_ctx->default_texture) {
 245          transfer = screen->get_tex_transfer(screen,
 246                                              st_ctx->default_texture,
 247                                              0, 0, 0,
 248                                              PIPE_TRANSFER_WRITE,
 249                                              0, 0,
 250                                              st_ctx->default_texture->width0,
 251                                              st_ctx->default_texture->height0);
 252          if (transfer) {
 253             uint32_t *map;
 254             map = (uint32_t *) screen->transfer_map(screen, transfer);
 255             if(map) {
 256                *map = 0x00000000;
 257                screen->transfer_unmap(screen, transfer);
 258             }
 259             screen->tex_transfer_destroy(transfer);
 260          }
 261       }
 262
 263       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 264          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], st_ctx->default_texture);
 265       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 266          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], st_ctx->default_texture);
 267
 268       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->fragment_sampler_textures);
 269       cso_set_vertex_sampler_textures(st_ctx->cso, PIPE_MAX_VERTEX_SAMPLERS, st_ctx->vertex_sampler_textures);
 270    }
 271
 272    /* vertex shader */
 273    {
 274       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 275                                       TGSI_SEMANTIC_GENERIC };
 276       const uint semantic_indexes[] = { 0, 0 };
 277       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 278                                                        2,
 279                                                        semantic_names,
 280                                                        semantic_indexes);
 281       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 282    }
 283
 284    /* fragment shader */
 285    {
 286       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 287       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 288    }
 289
 290    return st_ctx;
 291 }