1 files changed, 305 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/python/st_device.c b/src/gallium/state_trackers/python/st_device.c
new file mode 100644
index 0000000000..ea7d18738f
--- /dev/null
+++ b/src/gallium/state_trackers/python/st_device.c
@@ -0,0 +1,305 @@
+/**************************************************************************
+ * 
+ * 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_screen.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_math.h"
+#include "util/u_memory.h"
+#include "util/u_simple_shaders.h"
+#include "trace/tr_screen.h"
+#include "trace/tr_context.h"
+
+#include "st_device.h"
+#include "st_winsys.h"
+
+
+static void
+st_device_really_destroy(struct st_device *st_dev) 
+{
+   if(st_dev->screen) {
+      /* FIXME: Don't really destroy until we keep track of every single 
+       * reference or we end up causing a segmentation fault every time 
+       * python exits. */
+#if 0
+      st_dev->screen->destroy(st_dev->screen);
+#endif
+   }
+   
+   FREE(st_dev);
+}
+
+
+static void
+st_device_reference(struct st_device **ptr, struct st_device *st_dev)
+{
+   struct st_device *old_dev = *ptr;
+
+   if (pipe_reference((struct pipe_reference **)ptr, &st_dev->reference))
+      st_device_really_destroy(old_dev);
+}
+
+
+void
+st_device_destroy(struct st_device *st_dev) 
+{
+   st_device_reference(&st_dev, NULL);
+}
+
+
+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->context_create)
+      return NULL;
+   
+   st_dev = CALLOC_STRUCT(st_device);
+   if(!st_dev)
+      return NULL;
+   
+   pipe_reference_init(&st_dev->reference, 1);
+   st_dev->st_ws = st_ws;
+   
+   st_dev->real_screen = st_ws->screen_create();
+   if(!st_dev->real_screen) {
+      st_device_destroy(st_dev);
+      return NULL;
+   }
+
+   st_dev->screen = trace_screen_create(st_dev->real_screen);
+   if(!st_dev->screen) {
+      st_device_destroy(st_dev);
+      return NULL;
+   }
+   
+   return st_dev;
+}
+
+
+struct st_device *
+st_device_create(boolean hardware) {
+   if(hardware)
+      return st_device_create_from_st_winsys(&st_hardpipe_winsys);
+   else
+      return st_device_create_from_st_winsys(&st_softpipe_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->cso) {
+         cso_delete_vertex_shader(st_ctx->cso, st_ctx->vs);
+         cso_delete_fragment_shader(st_ctx->cso, st_ctx->fs);
+         
+         cso_destroy_context(st_ctx->cso);
+      }
+      
+      if(st_ctx->pipe)
+         st_ctx->pipe->destroy(st_ctx->pipe);
+      
+      for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
+         pipe_texture_reference(&st_ctx->sampler_textures[i], NULL);
+      pipe_texture_reference(&st_ctx->default_texture, NULL);
+
+      FREE(st_ctx);
+      
+      st_device_reference(&st_dev, NULL);
+   }
+}
+
+
+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_device_reference(&st_ctx->st_dev, st_dev);
+   
+   st_ctx->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
+   if(!st_ctx->real_pipe) {
+      st_context_destroy(st_ctx);
+      return NULL;
+   }
+   
+   st_ctx->pipe = trace_context_create(st_dev->screen, st_ctx->real_pipe);
+   if(!st_ctx->pipe) {
+      st_context_destroy(st_ctx);
+      return NULL;
+   }
+
+   st_ctx->cso = cso_create_context(st_ctx->pipe);
+   if(!st_ctx->cso) {
+      st_context_destroy(st_ctx);
+      return NULL;
+   }
+   
+   /* disabled blending/masking */
+   {
+      struct pipe_blend_state blend;
+      memset(&blend, 0, sizeof(blend));
+      blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+      blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+      blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.colormask = PIPE_MASK_RGBA;
+      cso_set_blend(st_ctx->cso, &blend);
+   }
+
+   /* no-op depth/stencil/alpha */
+   {
+      struct pipe_depth_stencil_alpha_state depthstencil;
+      memset(&depthstencil, 0, sizeof(depthstencil));
+      cso_set_depth_stencil_alpha(st_ctx->cso, &depthstencil);
+   }
+
+   /* rasterizer */
+   {
+      struct pipe_rasterizer_state rasterizer;
+      memset(&rasterizer, 0, sizeof(rasterizer));
+      rasterizer.front_winding = PIPE_WINDING_CW;
+      rasterizer.cull_mode = PIPE_WINDING_NONE;
+      cso_set_rasterizer(st_ctx->cso, &rasterizer);
+   }
+
+   /* clip */
+   {
+      struct pipe_clip_state clip;
+      memset(&clip, 0, sizeof(clip));
+      st_ctx->pipe->set_clip_state(st_ctx->pipe, &clip);
+   }
+
+   /* identity viewport */
+   {
+      struct pipe_viewport_state viewport;
+      viewport.scale[0] = 1.0;
+      viewport.scale[1] = 1.0;
+      viewport.scale[2] = 1.0;
+      viewport.scale[3] = 1.0;
+      viewport.translate[0] = 0.0;
+      viewport.translate[1] = 0.0;
+      viewport.translate[2] = 0.0;
+      viewport.translate[3] = 0.0;
+      cso_set_viewport(st_ctx->cso, &viewport);
+   }
+
+   /* samplers */
+   {
+      struct pipe_sampler_state sampler;
+      unsigned i;
+      memset(&sampler, 0, sizeof(sampler));
+      sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+      sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+      sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
+      sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
+      sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
+      sampler.normalized_coords = 1;
+      for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
+         cso_single_sampler(st_ctx->cso, i, &sampler);
+      cso_single_sampler_done(st_ctx->cso);
+   }
+
+   /* default textures */
+   {
+      struct pipe_screen *screen = st_dev->screen;
+      struct pipe_texture templat;
+      struct pipe_transfer *transfer;
+      unsigned i;
+
+      memset( &templat, 0, sizeof( templat ) );
+      templat.target = PIPE_TEXTURE_2D;
+      templat.format = PIPE_FORMAT_A8R8G8B8_UNORM;
+      templat.block.size = 4;
+      templat.block.width = 1;
+      templat.block.height = 1;
+      templat.width[0] = 1;
+      templat.height[0] = 1;
+      templat.depth[0] = 1;
+      templat.last_level = 0;
+   
+      st_ctx->default_texture = screen->texture_create( screen, &templat );
+      if(st_ctx->default_texture) {
+         transfer = screen->get_tex_transfer(screen,
+                                             st_ctx->default_texture,
+                                             0, 0, 0,
+                                             PIPE_TRANSFER_WRITE,
+                                             0, 0,
+                                             st_ctx->default_texture->width[0],
+                                             st_ctx->default_texture->height[0]);
+         if (transfer) {
+            uint32_t *map;
+            map = (uint32_t *) screen->transfer_map(screen, transfer);
+            if(map) {
+               *map = 0x00000000;
+               screen->transfer_unmap(screen, transfer);
+            }
+            screen->tex_transfer_destroy(transfer);
+         }
+      }
+   
+      for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
+         pipe_texture_reference(&st_ctx->sampler_textures[i], st_ctx->default_texture);
+      
+      cso_set_sampler_textures(st_ctx->cso, PIPE_MAX_SAMPLERS, st_ctx->sampler_textures);
+   }
+   
+   /* 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);
+      cso_set_vertex_shader_handle(st_ctx->cso, st_ctx->vs);
+   }
+
+   /* fragment shader */
+   {
+      st_ctx->fs = util_make_fragment_passthrough_shader(st_ctx->pipe);
+      cso_set_fragment_shader_handle(st_ctx->cso, st_ctx->fs);
+   }
+
+   return st_ctx;
+}