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->st_ws = st_ws;
  74
  75    st_dev->screen = st_ws->screen_create();
  76    if(!st_dev->screen)
  77       st_device_destroy(st_dev);
  78
  79    return st_dev;
  80 }
  81
  82
  83 struct st_device *
  84 st_device_create(boolean hardware) {
  85 #if 0
  86    if(hardware)
  87       return st_device_create_from_st_winsys(&st_hardware_winsys);
  88    else
  89 #endif
  90       return st_device_create_from_st_winsys(&st_software_winsys);
  91 }
  92
  93
  94 void
  95 st_context_destroy(struct st_context *st_ctx)
  96 {
  97    unsigned i;
  98
  99    if(st_ctx) {
 100       struct st_device *st_dev = st_ctx->st_dev;
 101
 102       if(st_ctx->cso) {
 103          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 104          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 105
 106          cso_destroy_context(st_ctx->cso);
 107       }
 108
 109       if(st_ctx->pipe)
 110          st_ctx->st_dev->st_ws->context_destroy(st_ctx->pipe);
 111
 112       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 113          pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
 114       pipe_texture_reference(&st_ctx->default_texture, NULL);
 115
 116       FREE(st_ctx);
 117
 118       if(!--st_dev->refcount)
 119          st_device_really_destroy(st_dev);
 120    }
 121 }
 122
 123
 124 struct st_context *
 125 st_context_create(struct st_device *st_dev)
 126 {
 127    struct st_context *st_ctx;
 128
 129    st_ctx = CALLOC_STRUCT(st_context);
 130    if(!st_ctx)
 131       return NULL;
 132
 133    st_ctx->st_dev = st_dev;
 134    ++st_dev->refcount;
 135
 136    st_ctx->pipe = st_dev->st_ws->context_create(st_dev->screen);
 137    if(!st_ctx->pipe)
 138       st_context_destroy(st_ctx);
 139
 140    st_ctx->cso = cso_create_context(st_ctx->pipe);
 141    if(!st_ctx->cso)
 142       st_context_destroy(st_ctx);
 143
 144    /* disabled blending/masking */
 145    {
 146       struct pipe_blend_state blend;
 147       memset(&blend, 0, sizeof(blend));
 148       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 149       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 150       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 151       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 152       blend.colormask = PIPE_MASK_RGBA;
 153       cso_set_blend(st_ctx->cso, &blend);
 154    }
 155
 156    /* no-op depth/stencil/alpha */
 157    {
 158       struct pipe_depth_stencil_alpha_state depthstencil;
 159       memset(&depthstencil, 0, sizeof(depthstencil));
 160       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 161    }
 162
 163    /* rasterizer */
 164    {
 165       struct pipe_rasterizer_state rasterizer;
 166       memset(&rasterizer, 0, sizeof(rasterizer));
 167       rasterizer.front_winding = PIPE_WINDING_CW;
 168       rasterizer.cull_mode = PIPE_WINDING_NONE;
 169       rasterizer.bypass_clipping = 1;
 170       /*rasterizer.bypass_vs = 1;*/
 171       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 172    }
 173
 174    /* identity viewport */
 175    {
 176       struct pipe_viewport_state viewport;
 177       viewport.scale[0] = 1.0;
 178       viewport.scale[1] = 1.0;
 179       viewport.scale[2] = 1.0;
 180       viewport.scale[3] = 1.0;
 181       viewport.translate[0] = 0.0;
 182       viewport.translate[1] = 0.0;
 183       viewport.translate[2] = 0.0;
 184       viewport.translate[3] = 0.0;
 185       cso_set_viewport(st_ctx->cso, &viewport);
 186    }
 187
 188    /* samplers */
 189    {
 190       struct pipe_sampler_state sampler;
 191       unsigned i;
 192       memset(&sampler, 0, sizeof(sampler));
 193       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 194       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 195       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 196       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 197       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 198       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 199       sampler.normalized_coords = 1;
 200       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 201          cso_single_sampler(st_ctx->cso, i, &sampler);
 202       cso_single_sampler_done(st_ctx->cso);
 203    }
 204
 205    /* default textures */
 206    {
 207       struct pipe_screen *screen = st_dev->screen;
 208       struct pipe_texture templat;
 209       struct pipe_surface *surface;
 210       unsigned i;
 211
 212       memset( &templat, 0, sizeof( templat ) );
 213       templat.target = PIPE_TEXTURE_2D;
 214       templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
 215       templat.block.size = 4;
 216       templat.block.width = 1;
 217       templat.block.height = 1;
 218       templat.width[0] = 1;
 219       templat.height[0] = 1;
 220       templat.depth[0] = 1;
 221       templat.last_level = 0;
 222
 223       st_ctx->default_texture = screen->texture_create( screen, &templat );
 224       if(st_ctx->default_texture) {
 225          surface = screen->get_tex_surface( screen,
 226                                             st_ctx->default_texture, 0, 0, 0,
 227                                             PIPE_BUFFER_USAGE_CPU_WRITE );
 228          if(surface) {
 229             uint32_t *map;
 230             map = (uint32_t *) pipe_surface_map(surface, PIPE_BUFFER_USAGE_CPU_WRITE );
 231             if(map) {
 232                *map = 0x00000000;
 233                pipe_surface_unmap( surface );
 234             }
 235             pipe_surface_reference(&surface, NULL);
 236          }
 237       }
 238
 239       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 240          pipe_texture_reference(&st_ctx->sampler_textures[i], st_ctx->default_texture);
 241
 242       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
 243    }
 244
 245    /* vertex shader */
 246    {
 247       struct pipe_shader_state vert_shader;
 248
 249       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 250                                       TGSI_SEMANTIC_GENERIC };
 251       const uint semantic_indexes[] = { 0, 0 };
 252       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 253                                                        2,
 254                                                        semantic_names,
 255                                                        semantic_indexes,
 256                                                        &vert_shader);
 257       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 258    }
 259
 260    /* fragment shader */
 261    {
 262       struct pipe_shader_state frag_shader;
 263       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe,
 264                                                          &frag_shader);
 265       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 266    }
 267
 268    return st_ctx;
 269 }