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       st_dev->screen->destroy(st_dev->screen);
  49
  50    FREE(st_dev);
  51 }
  52
  53
  54 static void
  55 st_device_reference(struct st_device **ptr, struct st_device *st_dev)
  56 {
  57    struct st_device *old_dev = *ptr;
  58
  59    if (pipe_reference((struct pipe_reference **)ptr, &st_dev->reference))
  60       st_device_really_destroy(old_dev);
  61 }
  62
  63
  64 void
  65 st_device_destroy(struct st_device *st_dev)
  66 {
  67    st_device_reference(&st_dev, NULL);
  68 }
  69
  70
  71 static struct st_device *
  72 st_device_create_from_st_winsys(const struct st_winsys *st_ws)
  73 {
  74    struct st_device *st_dev;
  75
  76    if(!st_ws->screen_create ||
  77       !st_ws->context_create)
  78       return NULL;
  79
  80    st_dev = CALLOC_STRUCT(st_device);
  81    if(!st_dev)
  82       return NULL;
  83
  84    pipe_reference_init(&st_dev->reference, 1);
  85    st_dev->st_ws = st_ws;
  86
  87    st_dev->real_screen = st_ws->screen_create();
  88    if(!st_dev->real_screen) {
  89       st_device_destroy(st_dev);
  90       return NULL;
  91    }
  92
  93    st_dev->screen = trace_screen_create(st_dev->real_screen);
  94    if(!st_dev->screen) {
  95       st_device_destroy(st_dev);
  96       return NULL;
  97    }
  98
  99    return st_dev;
 100 }
 101
 102
 103 struct st_device *
 104 st_device_create(boolean hardware) {
 105    if(hardware)
 106       return st_device_create_from_st_winsys(&st_hardpipe_winsys);
 107    else
 108       return st_device_create_from_st_winsys(&st_softpipe_winsys);
 109 }
 110
 111
 112 void
 113 st_context_destroy(struct st_context *st_ctx)
 114 {
 115    unsigned i;
 116
 117    if(st_ctx) {
 118       struct st_device *st_dev = st_ctx->st_dev;
 119
 120       if(st_ctx->cso) {
 121          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 122          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 123
 124          cso_destroy_context(st_ctx->cso);
 125       }
 126
 127       if(st_ctx->pipe)
 128          st_ctx->pipe->destroy(st_ctx->pipe);
 129
 130       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 131          pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
 132       pipe_texture_reference(&st_ctx->default_texture, NULL);
 133
 134       FREE(st_ctx);
 135
 136       st_device_reference(&st_dev, NULL);
 137    }
 138 }
 139
 140
 141 struct st_context *
 142 st_context_create(struct st_device *st_dev)
 143 {
 144    struct st_context *st_ctx;
 145
 146    st_ctx = CALLOC_STRUCT(st_context);
 147    if(!st_ctx)
 148       return NULL;
 149
 150    st_device_reference(&st_ctx->st_dev, st_dev);
 151
 152    st_ctx->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
 153    if(!st_ctx->real_pipe) {
 154       st_context_destroy(st_ctx);
 155       return NULL;
 156    }
 157
 158    st_ctx->pipe = trace_context_create(st_dev->screen, st_ctx->real_pipe);
 159    if(!st_ctx->pipe) {
 160       st_context_destroy(st_ctx);
 161       return NULL;
 162    }
 163
 164    st_ctx->cso = cso_create_context(st_ctx->pipe);
 165    if(!st_ctx->cso) {
 166       st_context_destroy(st_ctx);
 167       return NULL;
 168    }
 169
 170    /* disabled blending/masking */
 171    {
 172       struct pipe_blend_state blend;
 173       memset(&blend, 0, sizeof(blend));
 174       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 175       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 176       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 177       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 178       blend.colormask = PIPE_MASK_RGBA;
 179       cso_set_blend(st_ctx->cso, &blend);
 180    }
 181
 182    /* no-op depth/stencil/alpha */
 183    {
 184       struct pipe_depth_stencil_alpha_state depthstencil;
 185       memset(&depthstencil, 0, sizeof(depthstencil));
 186       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 187    }
 188
 189    /* rasterizer */
 190    {
 191       struct pipe_rasterizer_state rasterizer;
 192       memset(&rasterizer, 0, sizeof(rasterizer));
 193       rasterizer.front_winding = PIPE_WINDING_CW;
 194       rasterizer.cull_mode = PIPE_WINDING_NONE;
 195       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 196    }
 197
 198    /* clip */
 199    {
 200       struct pipe_clip_state clip;
 201       memset(&clip, 0, sizeof(clip));
 202       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 203    }
 204
 205    /* identity viewport */
 206    {
 207       struct pipe_viewport_state viewport;
 208       viewport.scale[0] = 1.0;
 209       viewport.scale[1] = 1.0;
 210       viewport.scale[2] = 1.0;
 211       viewport.scale[3] = 1.0;
 212       viewport.translate[0] = 0.0;
 213       viewport.translate[1] = 0.0;
 214       viewport.translate[2] = 0.0;
 215       viewport.translate[3] = 0.0;
 216       cso_set_viewport(st_ctx->cso, &viewport);
 217    }
 218
 219    /* samplers */
 220    {
 221       struct pipe_sampler_state sampler;
 222       unsigned i;
 223       memset(&sampler, 0, sizeof(sampler));
 224       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 225       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 226       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 227       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 228       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 229       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 230       sampler.normalized_coords = 1;
 231       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 232          cso_single_sampler(st_ctx->cso, i, &sampler);
 233       cso_single_sampler_done(st_ctx->cso);
 234    }
 235
 236    /* default textures */
 237    {
 238       struct pipe_screen *screen = st_dev->screen;
 239       struct pipe_texture templat;
 240       struct pipe_transfer *transfer;
 241       unsigned i;
 242
 243       memset( &templat, 0, sizeof( templat ) );
 244       templat.target = PIPE_TEXTURE_2D;
 245       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 246       templat.block.size = 4;
 247       templat.block.width = 1;
 248       templat.block.height = 1;
 249       templat.width[0] = 1;
 250       templat.height[0] = 1;
 251       templat.depth[0] = 1;
 252       templat.last_level = 0;
 253
 254       st_ctx->default_texture = screen->texture_create( screen, &templat );
 255       if(st_ctx->default_texture) {
 256          transfer = screen->get_tex_transfer(screen,
 257                                              st_ctx->default_texture,
 258                                              0, 0, 0,
 259                                              PIPE_TRANSFER_WRITE,
 260                                              0, 0,
 261                                              st_ctx->default_texture->width[0],
 262                                              st_ctx->default_texture->height[0]);
 263          if (transfer) {
 264             uint32_t *map;
 265             map = (uint32_t *) screen->transfer_map(screen, transfer);
 266             if(map) {
 267                *map = 0x00000000;
 268                screen->transfer_unmap(screen, transfer);
 269             }
 270             screen->tex_transfer_destroy(transfer);
 271          }
 272       }
 273
 274       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 275          pipe_texture_reference(&st_ctx->sampler_textures[i], st_ctx->default_texture);
 276
 277       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
 278    }
 279
 280    /* vertex shader */
 281    {
 282       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 283                                       TGSI_SEMANTIC_GENERIC };
 284       const uint semantic_indexes[] = { 0, 0 };
 285       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 286                                                        2,
 287                                                        semantic_names,
 288                                                        semantic_indexes);
 289       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 290    }
 291
 292    /* fragment shader */
 293    {
 294       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 295       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 296    }
 297
 298    return st_ctx;
 299 }