python: New state tracker which exposes the pipe driver to python scripts.

Still under development. Just barely works.

src/gallium/state_trackers/python/st_device.c

@@ -0,0 +1,169 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+
+#include "pipe/p_util.h"
+#include "pipe/p_winsys.h"
+#include "pipe/p_context.h"
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_inlines.h"
+#include "cso_cache/cso_context.h"
+#include "util/u_simple_shaders.h"
+#include "st_device.h"
+#include "st_winsys.h"
+
+
+static void
+st_device_really_destroy(struct st_device *st_dev) 
+{
+   if(st_dev->screen)
+      st_dev->st_ws->screen_destroy(st_dev->screen);
+   
+   FREE(st_dev);
+}
+
+
+void
+st_device_destroy(struct st_device *st_dev) 
+{
+   if(!--st_dev->refcount)
+      st_device_really_destroy(st_dev);
+}
+
+
+static struct st_device *
+st_device_create_from_st_winsys(const struct st_winsys *st_ws) 
+{
+   struct st_device *st_dev;
+   
+   if(!st_ws->screen_create ||
+      !st_ws->screen_destroy ||
+      !st_ws->context_create ||
+      !st_ws->context_destroy)
+      return NULL;
+   
+   st_dev = CALLOC_STRUCT(st_device);
+   if(!st_dev)
+      return NULL;
+   
+   st_dev->st_ws = st_ws;
+   
+   st_dev->screen = st_ws->screen_create();
+   if(!st_dev->screen)
+      st_device_destroy(st_dev);
+   
+   return st_dev;
+}
+
+
+struct st_device *
+st_device_create(boolean hardware) {
+#if 0
+   if(hardware)
+      return st_device_create_from_st_winsys(&st_hardware_winsys);
+   else
+#endif
+      return st_device_create_from_st_winsys(&st_software_winsys);
+}
+
+
+void
+st_context_destroy(struct st_context *st_ctx) 
+{
+   unsigned i;
+   
+   if(st_ctx) {
+      struct st_device *st_dev = st_ctx->st_dev;
+      
+      if(st_ctx->vs) {
+         st_ctx->pipe->bind_vs_state(st_ctx->pipe, NULL);
+         st_ctx->pipe->delete_vs_state(st_ctx->pipe, st_ctx->vs);
+      }
+
+      if(st_ctx->fs) {
+         st_ctx->pipe->bind_fs_state(st_ctx->pipe, NULL);
+         st_ctx->pipe->delete_fs_state(st_ctx->pipe, st_ctx->fs);
+      }
+      
+      if(st_ctx->cso)
+         cso_destroy_context(st_ctx->cso);
+      
+      if(st_ctx->pipe)
+         st_ctx->st_dev->st_ws->context_destroy(st_ctx->pipe);
+      
+      for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
+         pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
+   
+      FREE(st_ctx);
+      
+      if(!--st_dev->refcount)
+         st_device_really_destroy(st_dev);
+   }
+}
+
+
+struct st_context *
+st_context_create(struct st_device *st_dev) 
+{
+   struct st_context *st_ctx;
+   
+   st_ctx = CALLOC_STRUCT(st_context);
+   if(!st_ctx)
+      return NULL;
+   
+   st_ctx->st_dev = st_dev;
+   ++st_dev->refcount;
+   
+   st_ctx->pipe = st_dev->st_ws->context_create(st_dev->screen);
+   if(!st_ctx->pipe)
+      st_context_destroy(st_ctx);
+   
+   st_ctx->cso = cso_create_context(st_ctx->pipe);
+   if(!st_ctx->cso)
+      st_context_destroy(st_ctx);
+   
+   /* vertex shader */
+   {
+      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
+                                      TGSI_SEMANTIC_GENERIC };
+      const uint semantic_indexes[] = { 0, 0 };
+      st_ctx->vs = util_make_vertex_passthrough_shader(st_ctx->pipe, 
+                                                       2, 
+                                                       semantic_names,
+                                                       semantic_indexes,
+                                                       &st_ctx->vert_shader);
+   }
+
+   /* fragment shader */
+   st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe, 
+                                                      &st_ctx->frag_shader);
+   
+   st_ctx->pipe->bind_fs_state(st_ctx->pipe, st_ctx->fs);
+   st_ctx->pipe->bind_vs_state(st_ctx->pipe, st_ctx->vs);
+
+   return st_ctx;
+}