-/* $Id: depth.c,v 1.31 2002/10/24 23:57:20 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 5.1
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 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"),
#include "glheader.h"
#include "imports.h"
#include "context.h"
-#include "enums.h"
#include "depth.h"
+#include "enums.h"
+#include "hash.h"
#include "macros.h"
#include "mtypes.h"
-void
+void GLAPIENTRY
_mesa_ClearDepth( GLclampd depth )
{
GET_CURRENT_CONTEXT(ctx);
- GLfloat tmp = (GLfloat) CLAMP( depth, 0.0, 1.0 );
ASSERT_OUTSIDE_BEGIN_END(ctx);
- if (ctx->Depth.Clear == tmp)
+ depth = CLAMP( depth, 0.0, 1.0 );
+
+ if (ctx->Depth.Clear == depth)
return;
FLUSH_VERTICES(ctx, _NEW_DEPTH);
- ctx->Depth.Clear = tmp;
+ ctx->Depth.Clear = depth;
if (ctx->Driver.ClearDepth)
(*ctx->Driver.ClearDepth)( ctx, ctx->Depth.Clear );
}
-void
+void GLAPIENTRY
_mesa_DepthFunc( GLenum func )
{
GET_CURRENT_CONTEXT(ctx);
-void
+void GLAPIENTRY
_mesa_DepthMask( GLboolean flag )
{
GET_CURRENT_CONTEXT(ctx);
if (ctx->Driver.DepthMask)
ctx->Driver.DepthMask( ctx, flag );
}
+
+
+
+/* GL_EXT_depth_bounds_test */
+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 *****/
+/**********************************************************************/
+
+void _mesa_init_depth( GLcontext * ctx )
+{
+ /* Depth buffer group */
+ ctx->Depth.Test = GL_FALSE;
+ ctx->Depth.Clear = 1.0;
+ ctx->Depth.Func = GL_LESS;
+ ctx->Depth.Mask = GL_TRUE;
+ ctx->Depth.OcclusionTest = GL_FALSE;
+
+ /* Z buffer stuff */
+ if (ctx->Visual.depthBits == 0) {
+ /* Special case. Even if we don't have a depth buffer we need
+ * good values for DepthMax for Z vertex transformation purposes
+ * and for per-fragment fog computation.
+ */
+ ctx->DepthMax = 1 << 16;
+ ctx->DepthMaxF = (GLfloat) ctx->DepthMax;
+ }
+ else if (ctx->Visual.depthBits < 32) {
+ ctx->DepthMax = (1 << ctx->Visual.depthBits) - 1;
+ ctx->DepthMaxF = (GLfloat) ctx->DepthMax;
+ }
+ else {
+ /* Special case since shift values greater than or equal to the
+ * number of bits in the left hand expression's type are undefined.
+ */
+ ctx->DepthMax = 0xffffffff;
+ ctx->DepthMaxF = (GLfloat) ctx->DepthMax;
+ }
+ ctx->MRD = 1.0; /* Minimum resolvable depth value, for polygon offset */
+
+#if FEATURE_ARB_occlusion_query
+ ctx->Occlusion.QueryObjects = _mesa_NewHashTable();
+#endif
+ ctx->OcclusionResult = GL_FALSE;
+ ctx->OcclusionResultSaved = GL_FALSE;
+}