1 files changed, 263 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/dri/common/dri_st_api.c b/src/gallium/state_trackers/dri/common/dri_st_api.c
new file mode 100644
index 0000000000..40b24b18e9
--- /dev/null
+++ b/src/gallium/state_trackers/dri/common/dri_st_api.c
@@ -0,0 +1,263 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * 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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL 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.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "util/u_format.h"
+#include "util/u_debug.h"
+#include "state_tracker/st_manager.h" /* for st_manager_create_api */
+
+#include "dri_screen.h"
+#include "dri_context.h"
+#include "dri_drawable.h"
+#include "dri_st_api.h"
+#include "dri1_helper.h"
+#ifndef __NOT_HAVE_DRM_H
+#include "dri1.h"
+#include "dri2.h"
+#else
+#include "drisw.h"
+#endif
+
+static boolean
+dri_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
+                            const enum st_attachment_type *statts,
+                            unsigned count,
+                            struct pipe_texture **out)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   unsigned statt_mask, new_mask;
+   boolean new_stamp;
+   int i;
+
+   statt_mask = 0x0;
+   for (i = 0; i < count; i++)
+      statt_mask |= (1 << statts[i]);
+
+   /* record newly allocated textures */
+   new_mask = (statt_mask & ~drawable->texture_mask);
+
+   /*
+    * dPriv->pStamp is the server stamp.  It should be accessed with a lock, at
+    * least for DRI1.  dPriv->lastStamp is the client stamp.  It has the value
+    * of the server stamp when last checked.
+    */
+   new_stamp = (drawable->texture_stamp != drawable->dPriv->lastStamp);
+
+   if (new_stamp || new_mask) {
+
+#ifndef __NOT_HAVE_DRM_H
+      if (__dri1_api_hooks) {
+         dri1_allocate_textures(drawable, statt_mask);
+      }
+      else {
+         dri2_allocate_textures(drawable, statts, count);
+      }
+#else
+      if (new_stamp)
+         drisw_update_drawable_info(drawable->dPriv);
+
+      drisw_allocate_textures(drawable, statt_mask);
+#endif
+
+      /* add existing textures */
+      for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
+         if (drawable->textures[i])
+            statt_mask |= (1 << i);
+      }
+
+      drawable->texture_stamp = drawable->dPriv->lastStamp;
+      drawable->texture_mask = statt_mask;
+   }
+
+   if (!out)
+      return TRUE;
+
+   for (i = 0; i < count; i++) {
+      out[i] = NULL;
+      pipe_texture_reference(&out[i], drawable->textures[statts[i]]);
+   }
+
+   return TRUE;
+}
+
+static boolean
+dri_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type statt)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+
+#ifndef __NOT_HAVE_DRM_H
+   if (__dri1_api_hooks) {
+      dri1_flush_frontbuffer(drawable, statt);
+   }
+   else {
+      dri2_flush_frontbuffer(drawable, statt);
+   }
+#else
+   drisw_flush_frontbuffer(drawable, statt);
+#endif
+
+   return TRUE;
+}
+
+/**
+ * Create a framebuffer from the given drawable.
+ */
+struct st_framebuffer_iface *
+dri_create_st_framebuffer(struct dri_drawable *drawable)
+{
+   struct st_framebuffer_iface *stfbi;
+
+   stfbi = CALLOC_STRUCT(st_framebuffer_iface);
+   if (stfbi) {
+      stfbi->visual = &drawable->stvis;
+      stfbi->flush_front = dri_st_framebuffer_flush_front;
+      stfbi->validate = dri_st_framebuffer_validate;
+      stfbi->st_manager_private = (void *) drawable;
+   }
+
+   return stfbi;
+}
+
+/**
+ * Destroy a framebuffer.
+ */
+void
+dri_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   int i;
+
+   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
+      pipe_texture_reference(&drawable->textures[i], NULL);
+
+   FREE(stfbi);
+}
+
+/**
+ * Validate the texture at an attachment.  Allocate the texture if it does not
+ * exist.
+ */
+void
+dri_st_framebuffer_validate_att(struct st_framebuffer_iface *stfbi,
+                                enum st_attachment_type statt)
+{
+   struct dri_drawable *drawable =
+      (struct dri_drawable *) stfbi->st_manager_private;
+   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
+   unsigned i, count = 0;
+
+   /* check if buffer already exists */
+   if (drawable->texture_mask & (1 << statt))
+      return;
+
+   /* make sure DRI2 does not destroy existing buffers */
+   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
+      if (drawable->texture_mask & (1 << i)) {
+         statts[count++] = i;
+      }
+   }
+   statts[count++] = statt;
+
+   drawable->texture_stamp = drawable->dPriv->lastStamp - 1;
+
+   stfbi->validate(stfbi, statts, count, NULL);
+}
+
+/**
+ * Reference counted st_api.
+ */
+static struct {
+   int32_t refcnt;
+   struct st_api *stapi;
+} dri_st_api;
+
+/**
+ * Add a reference to the st_api of the state tracker.
+ */
+static void
+_dri_get_st_api(void)
+{
+   p_atomic_inc(&dri_st_api.refcnt);
+   if (p_atomic_read(&dri_st_api.refcnt) == 1)
+      dri_st_api.stapi = st_manager_create_api();
+}
+
+/**
+ * Remove a reference to the st_api of the state tracker.
+ */
+static void
+_dri_put_st_api(void)
+{
+   struct st_api *stapi = dri_st_api.stapi;
+
+   if (p_atomic_dec_zero(&dri_st_api.refcnt)) {
+      stapi->destroy(dri_st_api.stapi);
+      dri_st_api.stapi = NULL;
+   }
+}
+
+/**
+ * Create a state tracker manager from the given screen.
+ */
+struct st_manager *
+dri_create_st_manager(struct dri_screen *screen)
+{
+   struct st_manager *smapi;
+
+   smapi = CALLOC_STRUCT(st_manager);
+   if (smapi) {
+      smapi->screen = screen->pipe_screen;
+      _dri_get_st_api();
+   }
+
+   return smapi;
+}
+
+/**
+ * Destroy a state tracker manager.
+ */
+void
+dri_destroy_st_manager(struct st_manager *smapi)
+{
+   _dri_put_st_api();
+   FREE(smapi);
+}
+
+/**
+ * Return the st_api of OpenGL state tracker.
+ */
+struct st_api *
+dri_get_st_api(void)
+{
+   assert(dri_st_api.stapi);
+   return dri_st_api.stapi;
+}