Merge remote-tracking branch 'origin/released'

Conflicts:
	libX11/src/OpenDis.c
	libX11/src/xcb_io.c
	xorg-server/xkeyboard-config/keymap/sun_vndr/all.in
	xorg-server/xkeyboard-config/semantics/default.in

1 files changed, 1065 insertions, 0 deletions

diff --git a/mesalib/src/mesa/main/errors.c b/mesalib/src/mesa/main/errors.c
new file mode 100644
index 000000000..22561003a
--- /dev/null
+++ b/mesalib/src/mesa/main/errors.c
@@ -0,0 +1,1065 @@
+/**
+ * \file errors.c
+ * Mesa debugging and error handling functions.
+ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2007  Brian Paul   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, 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.
+ */
+
+
+#include "errors.h"
+
+#include "imports.h"
+#include "context.h"
+#include "dispatch.h"
+#include "hash.h"
+#include "mtypes.h"
+#include "version.h"
+
+
+#define MAXSTRING MAX_DEBUG_MESSAGE_LENGTH
+
+
+struct gl_client_severity
+{
+   struct simple_node link;
+   GLuint ID;
+};
+
+static char out_of_memory[] = "Debugging error: out of memory";
+
+#define enum_is(e, kind1, kind2) \
+   ((e) == GL_DEBUG_##kind1##_##kind2##_ARB || (e) == GL_DONT_CARE)
+#define severity_is(sev, kind) enum_is(sev, SEVERITY, kind)
+#define source_is(s, kind) enum_is(s, SOURCE, kind)
+#define type_is(t, kind) enum_is(t, TYPE, kind)
+
+/* Prevent define collision on Windows */
+#undef ERROR
+
+enum {
+   SOURCE_APPLICATION,
+   SOURCE_THIRD_PARTY,
+
+   SOURCE_COUNT,
+   SOURCE_ANY = -1
+};
+
+enum {
+   TYPE_ERROR,
+   TYPE_DEPRECATED,
+   TYPE_UNDEFINED,
+   TYPE_PORTABILITY,
+   TYPE_PERFORMANCE,
+   TYPE_OTHER,
+
+   TYPE_COUNT,
+   TYPE_ANY = -1
+};
+
+enum {
+   SEVERITY_LOW,
+   SEVERITY_MEDIUM,
+   SEVERITY_HIGH,
+
+   SEVERITY_COUNT,
+   SEVERITY_ANY = -1
+};
+
+static int
+enum_to_index(GLenum e)
+{
+   switch (e) {
+   case GL_DEBUG_SOURCE_APPLICATION_ARB:
+      return (int)SOURCE_APPLICATION;
+   case GL_DEBUG_SOURCE_THIRD_PARTY_ARB:
+      return (int)SOURCE_THIRD_PARTY;
+
+   case GL_DEBUG_TYPE_ERROR_ARB:
+      return (int)TYPE_ERROR;
+   case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB:
+      return (int)TYPE_DEPRECATED;
+   case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB:
+      return (int)TYPE_UNDEFINED;
+   case GL_DEBUG_TYPE_PERFORMANCE_ARB:
+      return (int)TYPE_PERFORMANCE;
+   case GL_DEBUG_TYPE_PORTABILITY_ARB:
+      return (int)TYPE_PORTABILITY;
+   case GL_DEBUG_TYPE_OTHER_ARB:
+      return (int)TYPE_OTHER;
+
+   case GL_DEBUG_SEVERITY_LOW_ARB:
+      return (int)SEVERITY_LOW;
+   case GL_DEBUG_SEVERITY_MEDIUM_ARB:
+      return (int)SEVERITY_MEDIUM;
+   case GL_DEBUG_SEVERITY_HIGH_ARB:
+      return (int)SEVERITY_HIGH;
+
+   case GL_DONT_CARE:
+      return (int)TYPE_ANY;
+
+   default:
+      assert(0 && "unreachable");
+      return -2;
+   };
+}
+
+
+/*
+ * We store a bitfield in the hash table, with five possible values total.
+ *
+ * The ENABLED_BIT's purpose is self-explanatory.
+ *
+ * The FOUND_BIT is needed to differentiate the value of DISABLED from
+ * the value returned by HashTableLookup() when it can't find the given key.
+ *
+ * The KNOWN_SEVERITY bit is a bit complicated:
+ *
+ * A client may call Control() with an array of IDs, then call Control()
+ * on all message IDs of a certain severity, then Insert() one of the
+ * previously specified IDs, giving us a known severity level, then call
+ * Control() on all message IDs of a certain severity level again.
+ *
+ * After the first call, those IDs will have a FOUND_BIT, but will not
+ * exist in any severity-specific list, so the second call will not
+ * impact them. This is undesirable but unavoidable given the API:
+ * The only entrypoint that gives a severity for a client-defined ID
+ * is the Insert() call.
+ *
+ * For the sake of Control(), we want to maintain the invariant
+ * that an ID will either appear in none of the three severity lists,
+ * or appear once, to minimize pointless duplication and potential surprises.
+ *
+ * Because Insert() is the only place that will learn an ID's severity,
+ * it should insert an ID into the appropriate list, but only if the ID
+ * doesn't exist in it or any other list yet. Because searching all three
+ * lists at O(n) is needlessly expensive, we store KNOWN_SEVERITY.
+ */
+enum {
+   FOUND_BIT = 1 << 0,
+   ENABLED_BIT = 1 << 1,
+   KNOWN_SEVERITY = 1 << 2,
+
+   /* HashTable reserves zero as a return value meaning 'not found' */
+   NOT_FOUND = 0,
+   DISABLED = FOUND_BIT,
+   ENABLED = ENABLED_BIT | FOUND_BIT
+};
+
+/**
+ * Returns the state of the given message ID in a client-controlled
+ * namespace.
+ * 'source', 'type', and 'severity' are array indices like TYPE_ERROR,
+ * not GL enums.
+ */
+static GLboolean
+get_message_state(struct gl_context *ctx, int source, int type,
+                  GLuint id, int severity)
+{
+   struct gl_client_namespace *nspace =
+         &ctx->Debug.ClientIDs.Namespaces[source][type];
+   uintptr_t state;
+
+   /* In addition to not being able to store zero as a value, HashTable also
+      can't use zero as a key. */
+   if (id)
+      state = (uintptr_t)_mesa_HashLookup(nspace->IDs, id);
+   else
+      state = nspace->ZeroID;
+
+   /* Only do this once for each ID. This makes sure the ID exists in,
+      at most, one list, and does not pointlessly appear multiple times. */
+   if (!(state & KNOWN_SEVERITY)) {
+      struct gl_client_severity *entry;
+
+      if (state == NOT_FOUND) {
+         if (ctx->Debug.ClientIDs.Defaults[severity][source][type])
+            state = ENABLED;
+         else
+            state = DISABLED;
+      }
+
+      entry = malloc(sizeof *entry);
+      if (!entry)
+         goto out;
+
+      state |= KNOWN_SEVERITY;
+
+      if (id)
+         _mesa_HashInsert(nspace->IDs, id, (void*)state);
+      else
+         nspace->ZeroID = state;
+
+      entry->ID = id;
+      insert_at_tail(&nspace->Severity[severity], &entry->link);
+   }
+
+out:
+   return !!(state & ENABLED_BIT);
+}
+
+/**
+ * Sets the state of the given message ID in a client-controlled
+ * namespace.
+ * 'source' and 'type' are array indices like TYPE_ERROR, not GL enums.
+ */
+static void
+set_message_state(struct gl_context *ctx, int source, int type,
+                  GLuint id, GLboolean enabled)
+{
+   struct gl_client_namespace *nspace =
+         &ctx->Debug.ClientIDs.Namespaces[source][type];
+   uintptr_t state;
+
+   /* In addition to not being able to store zero as a value, HashTable also
+      can't use zero as a key. */
+   if (id)
+      state = (uintptr_t)_mesa_HashLookup(nspace->IDs, id);
+   else
+      state = nspace->ZeroID;
+
+   if (state == NOT_FOUND)
+      state = enabled ? ENABLED : DISABLED;
+   else {
+      if (enabled)
+         state |= ENABLED_BIT;
+      else
+         state &= ~ENABLED_BIT;
+   }
+
+   if (id)
+      _mesa_HashInsert(nspace->IDs, id, (void*)state);
+   else
+      nspace->ZeroID = state;
+}
+
+/**
+ * Whether a debugging message should be logged or not.
+ * For implementation-controlled namespaces, we keep an array
+ * of booleans per namespace, per context, recording whether
+ * each individual message is enabled or not. The message ID
+ * is an index into the namespace's array.
+ */
+static GLboolean
+should_log(struct gl_context *ctx, GLenum source, GLenum type,
+           GLuint id, GLenum severity)
+{
+   if (source == GL_DEBUG_SOURCE_APPLICATION_ARB ||
+       source == GL_DEBUG_SOURCE_THIRD_PARTY_ARB) {
+      int s, t, sev;
+      s = enum_to_index(source);
+      t = enum_to_index(type);
+      sev = enum_to_index(severity);
+
+      return get_message_state(ctx, s, t, sev, id);
+   }
+
+   if (type_is(type, ERROR)) {
+      if (source_is(source, API))
+         return ctx->Debug.ApiErrors[id];
+      if (source_is(source, WINDOW_SYSTEM))
+         return ctx->Debug.WinsysErrors[id];
+      if (source_is(source, SHADER_COMPILER))
+         return ctx->Debug.ShaderErrors[id];
+      if (source_is(source, OTHER))
+         return ctx->Debug.OtherErrors[id];
+   }
+
+   return (severity != GL_DEBUG_SEVERITY_LOW_ARB);
+}
+
+/**
+ * 'buf' is not necessarily a null-terminated string. When logging, copy
+ * 'len' characters from it, store them in a new, null-terminated string,
+ * and remember the number of bytes used by that string, *including*
+ * the null terminator this time.
+ */
+static void
+_mesa_log_msg(struct gl_context *ctx, GLenum source, GLenum type,
+              GLuint id, GLenum severity, GLint len, const char *buf)
+{
+   GLint nextEmpty;
+   struct gl_debug_msg *emptySlot;
+
+   assert(len >= 0 && len < MAX_DEBUG_MESSAGE_LENGTH);
+
+   if (!should_log(ctx, source, type, id, severity))
+      return;
+
+   if (ctx->Debug.Callback) {
+      ctx->Debug.Callback(source, type, id, severity,
+                          len, buf, ctx->Debug.CallbackData);
+      return;
+   }
+
+   if (ctx->Debug.NumMessages == MAX_DEBUG_LOGGED_MESSAGES)
+      return;
+
+   nextEmpty = (ctx->Debug.NextMsg + ctx->Debug.NumMessages)
+                          % MAX_DEBUG_LOGGED_MESSAGES;
+   emptySlot = &ctx->Debug.Log[nextEmpty];
+
+   assert(!emptySlot->message && !emptySlot->length);
+
+   emptySlot->message = MALLOC(len+1);
+   if (emptySlot->message) {
+      (void) strncpy(emptySlot->message, buf, (size_t)len);
+      emptySlot->message[len] = '\0';
+
+      emptySlot->length = len+1;
+      emptySlot->source = source;
+      emptySlot->type = type;
+      emptySlot->id = id;
+      emptySlot->severity = severity;
+   } else {
+      /* malloc failed! */
+      emptySlot->message = out_of_memory;
+      emptySlot->length = strlen(out_of_memory)+1;
+      emptySlot->source = GL_DEBUG_SOURCE_OTHER_ARB;
+      emptySlot->type = GL_DEBUG_TYPE_ERROR_ARB;
+      emptySlot->id = OTHER_ERROR_OUT_OF_MEMORY;
+      emptySlot->severity = GL_DEBUG_SEVERITY_HIGH_ARB;
+   }
+
+   if (ctx->Debug.NumMessages == 0)
+      ctx->Debug.NextMsgLength = ctx->Debug.Log[ctx->Debug.NextMsg].length;
+
+   ctx->Debug.NumMessages++;
+}
+
+/**
+ * Pop the oldest debug message out of the log.
+ * Writes the message string, including the null terminator, into 'buf',
+ * using up to 'bufSize' bytes. If 'bufSize' is too small, or
+ * if 'buf' is NULL, nothing is written.
+ *
+ * Returns the number of bytes written on success, or when 'buf' is NULL,
+ * the number that would have been written. A return value of 0
+ * indicates failure.
+ */
+static GLsizei
+_mesa_get_msg(struct gl_context *ctx, GLenum *source, GLenum *type,
+              GLuint *id, GLenum *severity, GLsizei bufSize, char *buf)
+{
+   struct gl_debug_msg *msg;
+   GLsizei length;
+
+   if (ctx->Debug.NumMessages == 0)
+      return 0;
+
+   msg = &ctx->Debug.Log[ctx->Debug.NextMsg];
+   length = msg->length;
+
+   assert(length > 0 && length == ctx->Debug.NextMsgLength);
+
+   if (bufSize < length && buf != NULL)
+      return 0;
+
+   if (severity)
+      *severity = msg->severity;
+   if (source)
+      *source = msg->source;
+   if (type)
+      *type = msg->type;
+   if (id)
+      *id = msg->id;
+
+   if (buf) {
+      assert(msg->message[length-1] == '\0');
+      (void) strncpy(buf, msg->message, (size_t)length);
+   }
+
+   if (msg->message != (char*)out_of_memory)
+      FREE(msg->message);
+   msg->message = NULL;
+   msg->length = 0;
+
+   ctx->Debug.NumMessages--;
+   ctx->Debug.NextMsg++;
+   ctx->Debug.NextMsg %= MAX_DEBUG_LOGGED_MESSAGES;
+   ctx->Debug.NextMsgLength = ctx->Debug.Log[ctx->Debug.NextMsg].length;
+
+   return length;
+}
+
+/**
+ * Verify that source, type, and severity are valid enums.
+ * glDebugMessageInsertARB only accepts two values for 'source',
+ * and glDebugMessageControlARB will additionally accept GL_DONT_CARE
+ * in any parameter, so handle those cases specially.
+ */
+static GLboolean
+validate_params(struct gl_context *ctx, unsigned caller,
+                GLenum source, GLenum type, GLenum severity)
+{
+#define INSERT 1
+#define CONTROL 2
+   switch(source) {
+   case GL_DEBUG_SOURCE_APPLICATION_ARB:
+   case GL_DEBUG_SOURCE_THIRD_PARTY_ARB:
+      break;
+   case GL_DEBUG_SOURCE_API_ARB:
+   case GL_DEBUG_SOURCE_SHADER_COMPILER_ARB:
+   case GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB:
+   case GL_DEBUG_SOURCE_OTHER_ARB:
+      if (caller != INSERT)
+         break;
+   case GL_DONT_CARE:
+      if (caller == CONTROL)
+         break;
+   default:
+      goto error;
+   }
+
+   switch(type) {
+   case GL_DEBUG_TYPE_ERROR_ARB:
+   case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB:
+   case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB:
+   case GL_DEBUG_TYPE_PERFORMANCE_ARB:
+   case GL_DEBUG_TYPE_PORTABILITY_ARB:
+   case GL_DEBUG_TYPE_OTHER_ARB:
+      break;
+   case GL_DONT_CARE:
+      if (caller == CONTROL)
+         break;
+   default:
+      goto error;
+   }
+
+   switch(severity) {
+   case GL_DEBUG_SEVERITY_HIGH_ARB:
+   case GL_DEBUG_SEVERITY_MEDIUM_ARB:
+   case GL_DEBUG_SEVERITY_LOW_ARB:
+      break;
+   case GL_DONT_CARE:
+      if (caller == CONTROL)
+         break;
+   default:
+      goto error;
+   }
+   return GL_TRUE;
+
+error:
+   {
+      const char *callerstr;
+      if (caller == INSERT)
+         callerstr = "glDebugMessageInsertARB";
+      else if (caller == CONTROL)
+         callerstr = "glDebugMessageControlARB";
+      else
+         return GL_FALSE;
+
+      _mesa_error( ctx, GL_INVALID_ENUM, "bad values passed to %s"
+                  "(source=0x%x, type=0x%x, severity=0x%x)", callerstr,
+                  source, type, severity);
+   }
+   return GL_FALSE;
+}
+
+static void GLAPIENTRY
+_mesa_DebugMessageInsertARB(GLenum source, GLenum type, GLuint id,
+                            GLenum severity, GLint length,
+                            const GLcharARB* buf)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (!validate_params(ctx, INSERT, source, type, severity))
+      return; /* GL_INVALID_ENUM */
+
+   if (length < 0)
+      length = strlen(buf);
+
+   if (length >= MAX_DEBUG_MESSAGE_LENGTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDebugMessageInsertARB"
+                 "(length=%d, which is not less than "
+                 "GL_MAX_DEBUG_MESSAGE_LENGTH_ARB=%d)", length,
+                 MAX_DEBUG_MESSAGE_LENGTH);
+      return;
+   }
+
+   _mesa_log_msg(ctx, source, type, id, severity, length, buf);
+}
+
+static GLuint GLAPIENTRY
+_mesa_GetDebugMessageLogARB(GLuint count, GLsizei logSize, GLenum* sources,
+                            GLenum* types, GLenum* ids, GLenum* severities,
+                            GLsizei* lengths, GLcharARB* messageLog)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint ret;
+
+   if (!messageLog)
+      logSize = 0;
+
+   if (logSize < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGetDebugMessageLogARB"
+                 "(logSize=%d : logSize must not be negative)", logSize);
+      return 0;
+   }
+
+   for (ret = 0; ret < count; ret++) {
+      GLsizei written = _mesa_get_msg(ctx, sources, types, ids, severities,
+                                      logSize, messageLog);
+      if (!written)
+         break;
+
+      if (messageLog) {
+         messageLog += written;
+         logSize -= written;
+      }
+      if (lengths) {
+         *lengths = written;
+         lengths++;
+      }
+
+      if (severities)
+         severities++;
+      if (sources)
+         sources++;
+      if (types)
+         types++;
+      if (ids)
+         ids++;
+   }
+
+   return ret;
+}
+
+/**
+ * 'array' is an array representing a particular debugging-message namespace.
+ * I.e., the set of all API errors, or the set of all Shader Compiler errors.
+ * 'size' is the size of 'array'. 'count' is the size of 'ids', an array
+ * of indices into 'array'. All the elements of 'array' at the indices
+ * listed in 'ids' will be overwritten with the value of 'enabled'.
+ *
+ * If 'count' is zero, all elements in 'array' are overwritten with the
+ * value of 'enabled'.
+ */
+static void
+control_messages(GLboolean *array, GLuint size,
+                 GLsizei count, const GLuint *ids, GLboolean enabled)
+{
+   GLsizei i;
+
+   if (!count) {
+      GLuint id;
+      for (id = 0; id < size; id++) {
+         array[id] = enabled;
+      }
+      return;
+   }
+
+   for (i = 0; i < count; i++) {
+      if (ids[i] >= size) {
+         /* XXX: The spec doesn't say what to do with a non-existent ID. */
+         continue;
+      }
+      array[ids[i]] = enabled;
+   }
+}
+
+/**
+ * Set the state of all message IDs found in the given intersection
+ * of 'source', 'type', and 'severity'. Note that all three of these
+ * parameters are array indices, not the corresponding GL enums.
+ *
+ * This requires both setting the state of all previously seen message
+ * IDs in the hash table, and setting the default state for all
+ * applicable combinations of source/type/severity, so that all the
+ * yet-unknown message IDs that may be used in the future will be
+ * impacted as if they were already known.
+ */
+static void
+control_app_messages_by_group(struct gl_context *ctx, int source, int type,
+                              int severity, GLboolean enabled)
+{
+   struct gl_client_debug *ClientIDs = &ctx->Debug.ClientIDs;
+   int s, t, sev, smax, tmax, sevmax;
+
+   if (source == SOURCE_ANY) {
+      source = 0;
+      smax = SOURCE_COUNT;
+   } else {
+      smax = source+1;
+   }
+
+   if (type == TYPE_ANY) {
+      type = 0;
+      tmax = TYPE_COUNT;
+   } else {
+      tmax = type+1;
+   }
+
+   if (severity == SEVERITY_ANY) {
+      severity = 0;
+      sevmax = SEVERITY_COUNT;
+   } else {
+      sevmax = severity+1;
+   }
+
+   for (sev = severity; sev < sevmax; sev++)
+      for (s = source; s < smax; s++)
+         for (t = type; t < tmax; t++) {
+            struct simple_node *node;
+            struct gl_client_severity *entry;
+
+            /* change the default for IDs we've never seen before. */
+            ClientIDs->Defaults[sev][s][t] = enabled;
+
+            /* Now change the state of IDs we *have* seen... */
+            foreach(node, &ClientIDs->Namespaces[s][t].Severity[sev]) {
+               entry = (struct gl_client_severity *)node;
+               set_message_state(ctx, s, t, entry->ID, enabled);
+            }
+         }
+}
+
+/**
+ * Debugging-message namespaces with the source APPLICATION or THIRD_PARTY
+ * require special handling, since the IDs in them are controlled by clients,
+ * not the OpenGL implementation.
+ *
+ * 'count' is the length of the array 'ids'. If 'count' is nonzero, all
+ * the given IDs in the namespace defined by 'esource' and 'etype'
+ * will be affected.
+ *
+ * If 'count' is zero, this sets the state of all IDs that match
+ * the combination of 'esource', 'etype', and 'eseverity'.
+ */
+static void
+control_app_messages(struct gl_context *ctx, GLenum esource, GLenum etype,
+                     GLenum eseverity, GLsizei count, const GLuint *ids,
+                     GLboolean enabled)
+{
+   int source, type, severity;
+   GLsizei i;
+
+   source = enum_to_index(esource);
+   type = enum_to_index(etype);
+   severity = enum_to_index(eseverity);
+
+   if (count)
+      assert(severity == SEVERITY_ANY && type != TYPE_ANY
+             && source != SOURCE_ANY);
+
+   for (i = 0; i < count; i++)
+      set_message_state(ctx, source, type, ids[i], enabled);
+
+   if (count)
+      return;
+
+   control_app_messages_by_group(ctx, source, type, severity, enabled);
+}
+
+static void GLAPIENTRY
+_mesa_DebugMessageControlARB(GLenum source, GLenum type, GLenum severity,
+                             GLsizei count, const GLuint *ids,
+                             GLboolean enabled)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDebugMessageControlARB"
+                 "(count=%d : count must not be negative)", count);
+      return;
+   }
+
+   if (!validate_params(ctx, CONTROL, source, type, severity))
+      return; /* GL_INVALID_ENUM */
+
+   if (count && (severity != GL_DONT_CARE || type == GL_DONT_CARE
+                 || source == GL_DONT_CARE)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glDebugMessageControlARB"
+                 "(When passing an array of ids, severity must be"
+         " GL_DONT_CARE, and source and type must not be GL_DONT_CARE.");
+      return;
+   }
+
+   if (source_is(source, APPLICATION) || source_is(source, THIRD_PARTY))
+      control_app_messages(ctx, source, type, severity, count, ids, enabled);
+
+   if (severity_is(severity, HIGH)) {
+      if (type_is(type, ERROR)) {
+         if (source_is(source, API))
+            control_messages(ctx->Debug.ApiErrors, API_ERROR_COUNT,
+                             count, ids, enabled);
+         if (source_is(source, WINDOW_SYSTEM))
+            control_messages(ctx->Debug.WinsysErrors, WINSYS_ERROR_COUNT,
+                             count, ids, enabled);
+         if (source_is(source, SHADER_COMPILER))
+            control_messages(ctx->Debug.ShaderErrors, SHADER_ERROR_COUNT,
+                             count, ids, enabled);
+         if (source_is(source, OTHER))
+            control_messages(ctx->Debug.OtherErrors, OTHER_ERROR_COUNT,
+                             count, ids, enabled);
+      }
+   }
+}
+
+static void GLAPIENTRY
+_mesa_DebugMessageCallbackARB(GLvoid *callback, GLvoid *userParam)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ctx->Debug.Callback = (GLDEBUGPROCARB)callback;
+   ctx->Debug.CallbackData = userParam;
+}
+
+void
+_mesa_init_errors_dispatch(struct _glapi_table *disp)
+{
+   SET_DebugMessageCallbackARB(disp, _mesa_DebugMessageCallbackARB);
+   SET_DebugMessageControlARB(disp, _mesa_DebugMessageControlARB);
+   SET_DebugMessageInsertARB(disp, _mesa_DebugMessageInsertARB);
+   SET_GetDebugMessageLogARB(disp, _mesa_GetDebugMessageLogARB);
+}
+
+void
+_mesa_init_errors(struct gl_context *ctx)
+{
+   int s, t, sev;
+   struct gl_client_debug *ClientIDs = &ctx->Debug.ClientIDs;
+
+   ctx->Debug.Callback = NULL;
+   ctx->Debug.SyncOutput = GL_FALSE;
+   ctx->Debug.Log[0].length = 0;
+   ctx->Debug.NumMessages = 0;
+   ctx->Debug.NextMsg = 0;
+   ctx->Debug.NextMsgLength = 0;
+
+   /* Enable all the messages with severity HIGH or MEDIUM by default. */
+   memset(ctx->Debug.ApiErrors, GL_TRUE, sizeof ctx->Debug.ApiErrors);
+   memset(ctx->Debug.WinsysErrors, GL_TRUE, sizeof ctx->Debug.WinsysErrors);
+   memset(ctx->Debug.ShaderErrors, GL_TRUE, sizeof ctx->Debug.ShaderErrors);
+   memset(ctx->Debug.OtherErrors, GL_TRUE, sizeof ctx->Debug.OtherErrors);
+   memset(ClientIDs->Defaults[SEVERITY_HIGH], GL_TRUE,
+          sizeof ClientIDs->Defaults[SEVERITY_HIGH]);
+   memset(ClientIDs->Defaults[SEVERITY_MEDIUM], GL_TRUE,
+          sizeof ClientIDs->Defaults[SEVERITY_MEDIUM]);
+   memset(ClientIDs->Defaults[SEVERITY_LOW], GL_FALSE,
+          sizeof ClientIDs->Defaults[SEVERITY_LOW]);
+
+   /* Initialize state for filtering client-provided debug messages. */
+   for (s = 0; s < SOURCE_COUNT; s++)
+      for (t = 0; t < TYPE_COUNT; t++) {
+         ClientIDs->Namespaces[s][t].IDs = _mesa_NewHashTable();
+         assert(ClientIDs->Namespaces[s][t].IDs);
+
+         for (sev = 0; sev < SEVERITY_COUNT; sev++)
+            make_empty_list(&ClientIDs->Namespaces[s][t].Severity[sev]);
+      }
+}
+
+void
+_mesa_free_errors_data(struct gl_context *ctx)
+{
+   int s, t, sev;
+   struct gl_client_debug *ClientIDs = &ctx->Debug.ClientIDs;
+
+   /* Tear down state for filtering client-provided debug messages. */
+   for (s = 0; s < SOURCE_COUNT; s++)
+      for (t = 0; t < TYPE_COUNT; t++) {
+         _mesa_DeleteHashTable(ClientIDs->Namespaces[s][t].IDs);
+         for (sev = 0; sev < SEVERITY_COUNT; sev++) {
+            struct simple_node *node, *tmp;
+            struct gl_client_severity *entry;
+
+            foreach_s(node, tmp, &ClientIDs->Namespaces[s][t].Severity[sev]) {
+               entry = (struct gl_client_severity *)node;
+               FREE(entry);
+            }
+         }
+      }
+}
+
+/**********************************************************************/
+/** \name Diagnostics */
+/*@{*/
+
+static void
+output_if_debug(const char *prefixString, const char *outputString,
+                GLboolean newline)
+{
+   static int debug = -1;
+
+   /* Check the MESA_DEBUG environment variable if it hasn't
+    * been checked yet.  We only have to check it once...
+    */
+   if (debug == -1) {
+      char *env = _mesa_getenv("MESA_DEBUG");
+
+      /* In a debug build, we print warning messages *unless*
+       * MESA_DEBUG is 0.  In a non-debug build, we don't
+       * print warning messages *unless* MESA_DEBUG is
+       * set *to any value*.
+       */
+#ifdef DEBUG
+      debug = (env != NULL && atoi(env) == 0) ? 0 : 1;
+#else
+      debug = (env != NULL) ? 1 : 0;
+#endif
+   }
+
+   /* Now only print the string if we're required to do so. */
+   if (debug) {
+      fprintf(stderr, "%s: %s", prefixString, outputString);
+      if (newline)
+         fprintf(stderr, "\n");
+
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+      /* stderr from windows applications without console is not usually 
+       * visible, so communicate with the debugger instead */ 
+      {
+         char buf[4096];
+         _mesa_snprintf(buf, sizeof(buf), "%s: %s%s", prefixString, outputString, newline ? "\n" : "");
+         OutputDebugStringA(buf);
+      }
+#endif
+   }
+}
+
+
+/**
+ * Return string version of GL error code.
+ */
+static const char *
+error_string( GLenum error )
+{
+   switch (error) {
+   case GL_NO_ERROR:
+      return "GL_NO_ERROR";
+   case GL_INVALID_VALUE:
+      return "GL_INVALID_VALUE";
+   case GL_INVALID_ENUM:
+      return "GL_INVALID_ENUM";
+   case GL_INVALID_OPERATION:
+      return "GL_INVALID_OPERATION";
+   case GL_STACK_OVERFLOW:
+      return "GL_STACK_OVERFLOW";
+   case GL_STACK_UNDERFLOW:
+      return "GL_STACK_UNDERFLOW";
+   case GL_OUT_OF_MEMORY:
+      return "GL_OUT_OF_MEMORY";
+   case GL_TABLE_TOO_LARGE:
+      return "GL_TABLE_TOO_LARGE";
+   case GL_INVALID_FRAMEBUFFER_OPERATION_EXT:
+      return "GL_INVALID_FRAMEBUFFER_OPERATION";
+   default:
+      return "unknown";
+   }
+}
+
+
+/**
+ * When a new type of error is recorded, print a message describing
+ * previous errors which were accumulated.
+ */
+static void
+flush_delayed_errors( struct gl_context *ctx )
+{
+   char s[MAXSTRING];
+
+   if (ctx->ErrorDebugCount) {
+      _mesa_snprintf(s, MAXSTRING, "%d similar %s errors", 
+                     ctx->ErrorDebugCount,
+                     error_string(ctx->ErrorValue));
+
+      output_if_debug("Mesa", s, GL_TRUE);
+
+      ctx->ErrorDebugCount = 0;
+   }
+}
+
+
+/**
+ * Report a warning (a recoverable error condition) to stderr if
+ * either DEBUG is defined or the MESA_DEBUG env var is set.
+ *
+ * \param ctx GL context.
+ * \param fmtString printf()-like format string.
+ */
+void
+_mesa_warning( struct gl_context *ctx, const char *fmtString, ... )
+{
+   char str[MAXSTRING];
+   va_list args;
+   va_start( args, fmtString );  
+   (void) _mesa_vsnprintf( str, MAXSTRING, fmtString, args );
+   va_end( args );
+   
+   if (ctx)
+      flush_delayed_errors( ctx );
+
+   output_if_debug("Mesa warning", str, GL_TRUE);
+}
+
+
+/**
+ * Report an internal implementation problem.
+ * Prints the message to stderr via fprintf().
+ *
+ * \param ctx GL context.
+ * \param fmtString problem description string.
+ */
+void
+_mesa_problem( const struct gl_context *ctx, const char *fmtString, ... )
+{
+   va_list args;
+   char str[MAXSTRING];
+   static int numCalls = 0;
+
+   (void) ctx;
+
+   if (numCalls < 50) {
+      numCalls++;
+
+      va_start( args, fmtString );  
+      _mesa_vsnprintf( str, MAXSTRING, fmtString, args );
+      va_end( args );
+      fprintf(stderr, "Mesa %s implementation error: %s\n",
+              MESA_VERSION_STRING, str);
+      fprintf(stderr, "Please report at bugs.freedesktop.org\n");
+   }
+}
+
+static GLboolean
+should_output(struct gl_context *ctx, GLenum error, const char *fmtString)
+{
+   static GLint debug = -1;
+
+   /* Check debug environment variable only once:
+    */
+   if (debug == -1) {
+      const char *debugEnv = _mesa_getenv("MESA_DEBUG");
+
+#ifdef DEBUG
+      if (debugEnv && strstr(debugEnv, "silent"))
+         debug = GL_FALSE;
+      else
+         debug = GL_TRUE;
+#else
+      if (debugEnv)
+         debug = GL_TRUE;
+      else
+         debug = GL_FALSE;
+#endif
+   }
+
+   if (debug) {
+      if (ctx->ErrorValue != error ||
+          ctx->ErrorDebugFmtString != fmtString) {
+         flush_delayed_errors( ctx );
+         ctx->ErrorDebugFmtString = fmtString;
+         ctx->ErrorDebugCount = 0;
+         return GL_TRUE;
+      }
+      ctx->ErrorDebugCount++;
+   }
+   return GL_FALSE;
+}
+
+
+/**
+ * Record an OpenGL state error.  These usually occur when the user
+ * passes invalid parameters to a GL function.
+ *
+ * If debugging is enabled (either at compile-time via the DEBUG macro, or
+ * run-time via the MESA_DEBUG environment variable), report the error with
+ * _mesa_debug().
+ * 
+ * \param ctx the GL context.
+ * \param error the error value.
+ * \param fmtString printf() style format string, followed by optional args
+ */
+void
+_mesa_error( struct gl_context *ctx, GLenum error, const char *fmtString, ... )
+{
+   GLboolean do_output, do_log;
+
+   do_output = should_output(ctx, error, fmtString);
+   do_log = should_log(ctx, GL_DEBUG_SOURCE_API_ARB, GL_DEBUG_TYPE_ERROR_ARB,
+                       API_ERROR_UNKNOWN, GL_DEBUG_SEVERITY_HIGH_ARB);
+
+   if (do_output || do_log) {
+      char s[MAXSTRING], s2[MAXSTRING];
+      int len;
+      va_list args;
+
+      va_start(args, fmtString);
+      len = _mesa_vsnprintf(s, MAXSTRING, fmtString, args);
+      va_end(args);
+
+      if (len >= MAXSTRING) {
+         /* Too long error message. Whoever calls _mesa_error should use
+          * shorter strings. */
+         ASSERT(0);
+         return;
+      }
+
+      len = _mesa_snprintf(s2, MAXSTRING, "%s in %s", error_string(error), s);
+      if (len >= MAXSTRING) {
+         /* Same as above. */
+         ASSERT(0);
+         return;
+      }
+
+      /* Print the error to stderr if needed. */
+      if (do_output) {
+         output_if_debug("Mesa: User error", s2, GL_TRUE);
+      }
+
+      /* Log the error via ARB_debug_output if needed.*/
+      if (do_log) {
+         _mesa_log_msg(ctx, GL_DEBUG_SOURCE_API_ARB, GL_DEBUG_TYPE_ERROR_ARB,
+                       API_ERROR_UNKNOWN, GL_DEBUG_SEVERITY_HIGH_ARB, len, s2);
+      }
+   }
+
+   /* Set the GL context error state for glGetError. */
+   _mesa_record_error(ctx, error);
+}
+
+
+/**
+ * Report debug information.  Print error message to stderr via fprintf().
+ * No-op if DEBUG mode not enabled.
+ * 
+ * \param ctx GL context.
+ * \param fmtString printf()-style format string, followed by optional args.
+ */
+void
+_mesa_debug( const struct gl_context *ctx, const char *fmtString, ... )
+{
+#ifdef DEBUG
+   char s[MAXSTRING];
+   va_list args;
+   va_start(args, fmtString);
+   _mesa_vsnprintf(s, MAXSTRING, fmtString, args);
+   va_end(args);
+   output_if_debug("Mesa", s, GL_FALSE);
+#endif /* DEBUG */
+   (void) ctx;
+   (void) fmtString;
+}
+
+/*@}*/