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->vs) {
 103          st_ctx->pipe->bind_vs_state(st_ctx->pipe, NULL);
 104          st_ctx->pipe->delete_vs_state(st_ctx->pipe, st_ctx->vs);
 105       }
 106
 107       if(st_ctx->fs) {
 108          st_ctx->pipe->bind_fs_state(st_ctx->pipe, NULL);
 109          st_ctx->pipe->delete_fs_state(st_ctx->pipe, st_ctx->fs);
 110       }
 111
 112       if(st_ctx->cso)
 113          cso_destroy_context(st_ctx->cso);
 114
 115       if(st_ctx->pipe)
 116          st_ctx->st_dev->st_ws->context_destroy(st_ctx->pipe);
 117
 118       for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
 119          pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
 120
 121       FREE(st_ctx);
 122
 123       if(!--st_dev->refcount)
 124          st_device_really_destroy(st_dev);
 125    }
 126 }
 127
 128
 129 struct st_context *
 130 st_context_create(struct st_device *st_dev)
 131 {
 132    struct st_context *st_ctx;
 133
 134    st_ctx = CALLOC_STRUCT(st_context);
 135    if(!st_ctx)
 136       return NULL;
 137
 138    st_ctx->st_dev = st_dev;
 139    ++st_dev->refcount;
 140
 141    st_ctx->pipe = st_dev->st_ws->context_create(st_dev->screen);
 142    if(!st_ctx->pipe)
 143       st_context_destroy(st_ctx);
 144
 145    st_ctx->cso = cso_create_context(st_ctx->pipe);
 146    if(!st_ctx->cso)
 147       st_context_destroy(st_ctx);
 148
 149    /* vertex shader */
 150    {
 151       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 152                                       TGSI_SEMANTIC_GENERIC };
 153       const uint semantic_indexes[] = { 0, 0 };
 154       st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe,
 155                                                        2,
 156                                                        semantic_names,
 157                                                        semantic_indexes,
 158                                                        &st_ctx->vert_shader);
 159    }
 160
 161    /* fragment shader */
 162    st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe,
 163                                                       &st_ctx->frag_shader);
 164
 165    st_ctx->pipe->bind_fs_state(st_ctx->pipe, st_ctx->fs);
 166    st_ctx->pipe->bind_vs_state(st_ctx->pipe, st_ctx->vs);
 167
 168    return st_ctx;
 169 }