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
  38 #include "st_device.h"
  39 #include "st_winsys.h"
  40
  41
  42 static void
  43 st_device_really_destroy(struct st_device *st_dev)
  44 {
  45    if(st_dev->screen) {
  46       /* FIXME: Don't really destroy until we keep track of every single
  47        * reference or we end up causing a segmentation fault every time
  48        * python exits. */
  49 #if 0
  50       st_dev->screen->destroy(st_dev->screen);
  51 #endif
  52    }
  53
  54    FREE(st_dev);
  55 }
  56
  57
  58 static void
  59 st_device_reference(struct st_device **ptr, struct st_device *st_dev)
  60 {
  61    struct st_device *old_dev = *ptr;
  62
  63    if (pipe_reference(&(*ptr)->reference, &st_dev->reference))
  64       st_device_really_destroy(old_dev);
  65    *ptr = st_dev;
  66 }
  67
  68
  69 void
  70 st_device_destroy(struct st_device *st_dev)
  71 {
  72    st_device_reference(&st_dev, NULL);
  73 }
  74
  75
  76 struct st_device *
  77 st_device_create(boolean hardware)
  78 {
  79    struct pipe_screen *screen;
  80    struct st_device *st_dev;
  81
  82    if (hardware)
  83       screen = st_hardware_screen_create();
  84    else
  85       screen = st_software_screen_create();
  86
  87    st_dev = CALLOC_STRUCT(st_device);
  88    if (!st_dev)
  89       goto no_device;
  90
  91    pipe_reference_init(&st_dev->reference, 1);
  92    st_dev->screen = screen;
  93
  94    return st_dev;
  95
  96 no_device:
  97    screen->destroy(screen);
  98 no_screen:
  99    return NULL;
 100 }
 101
 102
 103 void
 104 st_context_destroy(struct st_context *st_ctx)
 105 {
 106    unsigned i;
 107
 108    if(st_ctx) {
 109       struct st_device *st_dev = st_ctx->st_dev;
 110
 111       if(st_ctx->cso) {
 112          cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
 113          cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
 114
 115          cso_destroy_context(st_ctx->cso);
 116       }
 117
 118       if(st_ctx->pipe)
 119          st_ctx->pipe->destroy(st_ctx->pipe);
 120
 121       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 122          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], NULL);
 123       for(i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 124          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], NULL);
 125       pipe_texture_reference(&st_ctx->default_texture, NULL);
 126
 127       FREE(st_ctx);
 128
 129       st_device_reference(&st_dev, NULL);
 130    }
 131 }
 132
 133
 134 struct st_context *
 135 st_context_create(struct st_device *st_dev)
 136 {
 137    struct st_context *st_ctx;
 138
 139    st_ctx = CALLOC_STRUCT(st_context);
 140    if(!st_ctx)
 141       return NULL;
 142
 143    st_device_reference(&st_ctx->st_dev, st_dev);
 144
 145    st_ctx->pipe = st_dev->screen->context_create(st_dev->screen, NULL);
 146    if(!st_ctx->pipe) {
 147       st_context_destroy(st_ctx);
 148       return NULL;
 149    }
 150
 151    st_ctx->cso = cso_create_context(st_ctx->pipe);
 152    if(!st_ctx->cso) {
 153       st_context_destroy(st_ctx);
 154       return NULL;
 155    }
 156
 157    /* disabled blending/masking */
 158    {
 159       struct pipe_blend_state blend;
 160       memset(&blend, 0, sizeof(blend));
 161       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 162       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 163       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 164       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 165       blend.rt[0].colormask = PIPE_MASK_RGBA;
 166       cso_set_blend(st_ctx->cso, &blend);
 167    }
 168
 169    /* no-op depth/stencil/alpha */
 170    {
 171       struct pipe_depth_stencil_alpha_state depthstencil;
 172       memset(&depthstencil, 0, sizeof(depthstencil));
 173       cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
 174    }
 175
 176    /* rasterizer */
 177    {
 178       struct pipe_rasterizer_state rasterizer;
 179       memset(&rasterizer, 0, sizeof(rasterizer));
 180       rasterizer.front_winding = PIPE_WINDING_CW;
 181       rasterizer.cull_mode = PIPE_WINDING_NONE;
 182       cso_set_rasterizer(st_ctx->cso, &rasterizer);
 183    }
 184
 185    /* clip */
 186    {
 187       struct pipe_clip_state clip;
 188       memset(&clip, 0, sizeof(clip));
 189       st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
 190    }
 191
 192    /* identity viewport */
 193    {
 194       struct pipe_viewport_state viewport;
 195       viewport.scale[0] = 1.0;
 196       viewport.scale[1] = 1.0;
 197       viewport.scale[2] = 1.0;
 198       viewport.scale[3] = 1.0;
 199       viewport.translate[0] = 0.0;
 200       viewport.translate[1] = 0.0;
 201       viewport.translate[2] = 0.0;
 202       viewport.translate[3] = 0.0;
 203       cso_set_viewport(st_ctx->cso, &viewport);
 204    }
 205
 206    /* samplers */
 207    {
 208       struct pipe_sampler_state sampler;
 209       unsigned i;
 210       memset(&sampler, 0, sizeof(sampler));
 211       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 212       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 213       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 214       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 215       sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 216       sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 217       sampler.normalized_coords = 1;
 218       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 219          cso_single_sampler(st_ctx->cso, i, &sampler);
 220       cso_single_sampler_done(st_ctx->cso);
 221    }
 222
 223    /* default textures */
 224    {
 225       struct pipe_screen *screen = st_dev->screen;
 226       struct pipe_texture templat;
 227       struct pipe_transfer *transfer;
 228       unsigned i;
 229
 230       memset( &templat, 0, sizeof( templat ) );
 231       templat.target = PIPE_TEXTURE_2D;
 232       templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 233       templat.width0 = 1;
 234       templat.height0 = 1;
 235       templat.depth0 = 1;
 236       templat.last_level = 0;
 237
 238       st_ctx->default_texture = screen->texture_create( screen, &templat );
 239       if(st_ctx->default_texture) {
 240          transfer = screen->get_tex_transfer(screen,
 241                                              st_ctx->default_texture,
 242                                              0, 0, 0,
 243                                              PIPE_TRANSFER_WRITE,
 244                                              0, 0,
 245                                              st_ctx->default_texture->width0,
 246                                              st_ctx->default_texture->height0);
 247          if (transfer) {
 248             uint32_t *map;
 249             map = (uint32_t *) screen->transfer_map(screen, transfer);
 250             if(map) {
 251                *map = 0x00000000;
 252                screen->transfer_unmap(screen, transfer);
 253             }
 254             screen->tex_transfer_destroy(transfer);
 255          }
 256       }
 257
 258       for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 259          pipe_texture_reference(&st_ctx->fragment_sampler_textures[i], st_ctx->default_texture);
 260       for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 261          pipe_texture_reference(&st_ctx->vertex_sampler_textures[i], st_ctx->default_texture);
 262
 263       cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->fragment_sampler_textures);
 264       cso_set_vertex_sampler_textures(st_ctx->cso, PIPE_MAX_VERTEX_SAMPLERS, st_ctx->vertex_sampler_textures);
 265    }
 266
 267    /* vertex shader */
 268    {
 269       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 270                                       TGSI_SEMANTIC_GENERIC };
 271       const uint semantic_indexes[] = { 0, 0 };
 272       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 273                                                        2,
 274                                                        semantic_names,
 275                                                        semantic_indexes);
 276       cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
 277    }
 278
 279    /* fragment shader */
 280    {
 281       st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
 282       cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
 283    }
 284
 285    return st_ctx;
 286 }