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_util.h"
  30 #include "pipe/p_winsys.h"
  31 #include "pipe/p_context.h"
  32 #include "pipe/p_shader_tokens.h"
  33 #include "pipe/p_inlines.h"
  34 #include "cso_cache/cso_context.h"
  35 #include "util/u_simple_shaders.h"
  36 #include "st_device.h"
  37 #include "st_winsys.h"
  38
  39
  40 static void
  41 st_device_really_destroy(struct st_device *st_dev)
  42 {
  43    if(st_dev->screen)
  44       st_dev->st_ws->screen_destroy(st_dev->screen);
  45
  46    FREE(st_dev);
  47 }
  48
  49
  50 void
  51 st_device_destroy(struct st_device *st_dev)
  52 {
  53    if(!--st_dev->refcount)
  54       st_device_really_destroy(st_dev);
  55 }
  56
  57
  58 static struct st_device *
  59 st_device_create_from_st_winsys(const struct st_winsys *st_ws)
  60 {
  61    struct st_device *st_dev;
  62
  63    if(!st_ws->screen_create ||
  64       !st_ws->screen_destroy ||
  65       !st_ws->context_create ||
  66       !st_ws->context_destroy)
  67       return NULL;
  68
  69    st_dev = CALLOC_STRUCT(st_device);
  70    if(!st_dev)
  71       return NULL;
  72
  73    st_dev->refcount = 1;
  74    st_dev->st_ws = st_ws;
  75
  76    st_dev->screen = st_ws->screen_create();
  77    if(!st_dev->screen)
  78       st_device_destroy(st_dev);
  79
  80    return st_dev;
  81 }
  82
  83
  84 struct st_device *
  85 st_device_create(boolean hardware) {
  86    if(hardware)
  87       return st_device_create_from_st_winsys(&st_hardpipe_winsys);
  88    else
  89       return st_device_create_from_st_winsys(&st_softpipe_winsys);
  90 }
  91
  92
  93 void
  94 st_context_destroy(struct st_context *st_ctx)
  95 {
  96    unsigned i;
  97
  98    if(st_ctx) {
  99       struct st_device *st_dev = st_ctx->st_dev;
 100
 101       if(st_ctx->cso) {
 102          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 103          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 104
 105          cso_destroy_context(st_ctx->cso);
 106       }
 107
 108       if(st_ctx->pipe)
 109          st_ctx->st_dev->st_ws->context_destroy(st_ctx->pipe);
 110
 111       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 112          pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
 113       pipe_texture_reference(&st_ctx->default_texture, NULL);
 114
 115       FREE(st_ctx);
 116
 117       if(!--st_dev->refcount)
 118          st_device_really_destroy(st_dev);
 119    }
 120 }
 121
 122
 123 struct st_context *
 124 st_context_create(struct st_device *st_dev)
 125 {
 126    struct st_context *st_ctx;
 127
 128    st_ctx = CALLOC_STRUCT(st_context);
 129    if(!st_ctx)
 130       return NULL;
 131
 132    st_ctx->st_dev = st_dev;
 133    ++st_dev->refcount;
 134
 135    st_ctx->pipe = st_dev->st_ws->context_create(st_dev->screen);
 136    if(!st_ctx->pipe)
 137       st_context_destroy(st_ctx);
 138
 139    st_ctx->cso = cso_create_context(st_ctx->pipe);
 140    if(!st_ctx->cso)
 141       st_context_destroy(st_ctx);
 142
 143    /* disabled blending/masking */
 144    {
 145       struct pipe_blend_state blend;
 146       memset(&blend, 0, sizeof(blend));
 147       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 148       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 149       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 150       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 151       blend.colormask = PIPE_MASK_RGBA;
 152       cso_set_blend(st_ctx->cso, &blend);
 153    }
 154
 155    /* no-op depth/stencil/alpha */
 156    {
 157       struct pipe_depth_stencil_alpha_state depthstencil;
 158       memset(&depthstencil, 0, sizeof(depthstencil));
 159       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 160    }
 161
 162    /* rasterizer */
 163    {
 164       struct pipe_rasterizer_state rasterizer;
 165       memset(&rasterizer, 0, sizeof(rasterizer));
 166       rasterizer.front_winding = PIPE_WINDING_CW;
 167       rasterizer.cull_mode = PIPE_WINDING_NONE;
 168       rasterizer.bypass_clipping = 1;
 169       /*rasterizer.bypass_vs = 1;*/
 170       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 171    }
 172
 173    /* identity viewport */
 174    {
 175       struct pipe_viewport_state viewport;
 176       viewport.scale[0] = 1.0;
 177       viewport.scale[1] = 1.0;
 178       viewport.scale[2] = 1.0;
 179       viewport.scale[3] = 1.0;
 180       viewport.translate[0] = 0.0;
 181       viewport.translate[1] = 0.0;
 182       viewport.translate[2] = 0.0;
 183       viewport.translate[3] = 0.0;
 184       cso_set_viewport(st_ctx->cso, &viewport);
 185    }
 186
 187    /* samplers */
 188    {
 189       struct pipe_sampler_state sampler;
 190       unsigned i;
 191       memset(&sampler, 0, sizeof(sampler));
 192       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 193       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 194       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 195       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 196       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 197       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 198       sampler.normalized_coords = 1;
 199       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 200          cso_single_sampler(st_ctx->cso, i, &sampler);
 201       cso_single_sampler_done(st_ctx->cso);
 202    }
 203
 204    /* default textures */
 205    {
 206       struct pipe_screen *screen = st_dev->screen;
 207       struct pipe_texture templat;
 208       struct pipe_surface *surface;
 209       unsigned i;
 210
 211       memset( &templat, 0, sizeof( templat ) );
 212       templat.target = PIPE_TEXTURE_2D;
 213       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 214       templat.block.size = 4;
 215       templat.block.width = 1;
 216       templat.block.height = 1;
 217       templat.width[0] = 1;
 218       templat.height[0] = 1;
 219       templat.depth[0] = 1;
 220       templat.last_level = 0;
 221
 222       st_ctx->default_texture = screen->texture_create( screen, &templat );
 223       if(st_ctx->default_texture) {
 224          surface = screen->get_tex_surface( screen,
 225                                             st_ctx->default_texture, 0, 0, 0,
 226                                             PIPE_BUFFER_USAGE_CPU_WRITE );
 227          if(surface) {
 228             uint32_t *map;
 229             map = (uint32_t *) pipe_surface_map(surface, PIPE_BUFFER_USAGE_CPU_WRITE );
 230             if(map) {
 231                *map = 0x00000000;
 232                pipe_surface_unmap( surface );
 233             }
 234             pipe_surface_reference(&surface, NULL);
 235          }
 236       }
 237
 238       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 239          pipe_texture_reference(&st_ctx->sampler_textures[i], st_ctx->default_texture);
 240
 241       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
 242    }
 243
 244    /* vertex shader */
 245    {
 246       struct pipe_shader_state vert_shader;
 247
 248       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 249                                       TGSI_SEMANTIC_GENERIC };
 250       const uint semantic_indexes[] = { 0, 0 };
 251       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 252                                                        2,
 253                                                        semantic_names,
 254                                                        semantic_indexes,
 255                                                        &vert_shader);
 256       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 257    }
 258
 259    /* fragment shader */
 260    {
 261       struct pipe_shader_state frag_shader;
 262       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe,
 263                                                          &frag_shader);
 264       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 265    }
 266
 267    return st_ctx;
 268 }