1 files changed, 162 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/depth.c b/mesalib/src/mesa/main/depth.c
new file mode 100644
index 000000000..91c036ef9
--- /dev/null
+++ b/mesalib/src/mesa/main/depth.c
@@ -0,0 +1,162 @@
+/*
+ * 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 "glheader.h"
+#include "imports.h"
+#include "context.h"
+#include "depth.h"
+#include "enums.h"
+#include "macros.h"
+#include "mtypes.h"
+
+
+/**********************************************************************/
+/*****                          API Functions                     *****/
+/**********************************************************************/
+
+
+
+void GLAPIENTRY
+_mesa_ClearDepth( GLclampd depth )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   depth = CLAMP( depth, 0.0, 1.0 );
+
+   if (ctx->Depth.Clear == depth)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_DEPTH);
+   ctx->Depth.Clear = depth;
+   if (ctx->Driver.ClearDepth)
+      (*ctx->Driver.ClearDepth)( ctx, ctx->Depth.Clear );
+}
+
+
+
+void GLAPIENTRY
+_mesa_DepthFunc( GLenum func )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glDepthFunc %s\n", _mesa_lookup_enum_by_nr(func));
+
+   switch (func) {
+   case GL_LESS:    /* (default) pass if incoming z < stored z */
+   case GL_GEQUAL:
+   case GL_LEQUAL:
+   case GL_GREATER:
+   case GL_NOTEQUAL:
+   case GL_EQUAL:
+   case GL_ALWAYS:
+   case GL_NEVER:
+      break;
+   default:
+      _mesa_error( ctx, GL_INVALID_ENUM, "glDepth.Func" );
+      return;
+   }
+
+   if (ctx->Depth.Func == func)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_DEPTH);
+   ctx->Depth.Func = func;
+
+   if (ctx->Driver.DepthFunc)
+      ctx->Driver.DepthFunc( ctx, func );
+}
+
+
+
+void GLAPIENTRY
+_mesa_DepthMask( GLboolean flag )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glDepthMask %d\n", flag);
+
+   /*
+    * GL_TRUE indicates depth buffer writing is enabled (default)
+    * GL_FALSE indicates depth buffer writing is disabled
+    */
+   if (ctx->Depth.Mask == flag)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_DEPTH);
+   ctx->Depth.Mask = flag;
+
+   if (ctx->Driver.DepthMask)
+      ctx->Driver.DepthMask( ctx, flag );
+}
+
+
+
+/**
+ * Specified by the GL_EXT_depth_bounds_test extension.
+ */
+void GLAPIENTRY
+_mesa_DepthBoundsEXT( GLclampd zmin, GLclampd zmax )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (zmin > zmax) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDepthBoundsEXT(zmin > zmax)");
+      return;
+   }
+
+   zmin = CLAMP(zmin, 0.0, 1.0);
+   zmax = CLAMP(zmax, 0.0, 1.0);
+
+   if (ctx->Depth.BoundsMin == zmin && ctx->Depth.BoundsMax == zmax)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_DEPTH);
+   ctx->Depth.BoundsMin = (GLfloat) zmin;
+   ctx->Depth.BoundsMax = (GLfloat) zmax;
+}
+
+
+/**********************************************************************/
+/*****                      Initialization                        *****/
+/**********************************************************************/
+
+
+/**
+ * Initialize the depth buffer attribute group in the given context.
+ */
+void
+_mesa_init_depth(GLcontext *ctx)
+{
+   ctx->Depth.Test = GL_FALSE;
+   ctx->Depth.Clear = 1.0;
+   ctx->Depth.Func = GL_LESS;
+   ctx->Depth.Mask = GL_TRUE;
+}