--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2007 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.
+ *
+ **************************************************************************/
+
+ /*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul
+ */
+
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "softpipe/sp_context.h"
+#include "softpipe/sp_defines.h"
+
+
+/**
+ * Convert GLenum stencil func tokens to softpipe tokens.
+ */
+static GLuint
+gl_stencil_func_to_sp(GLenum func)
+{
+ /* Same values, just biased */
+ assert(SP_STENCIL_FUNC_NEVER == GL_NEVER - GL_NEVER);
+ assert(SP_STENCIL_FUNC_LESS == GL_LESS - GL_NEVER);
+ assert(SP_STENCIL_FUNC_EQUAL == GL_EQUAL - GL_NEVER);
+ assert(SP_STENCIL_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER);
+ assert(SP_STENCIL_FUNC_GREATER == GL_GREATER - GL_NEVER);
+ assert(SP_STENCIL_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER);
+ assert(SP_STENCIL_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER);
+ assert(SP_STENCIL_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER);
+ assert(func >= GL_NEVER);
+ assert(func <= GL_ALWAYS);
+ return func - GL_NEVER;
+}
+
+
+/**
+ * Convert GLenum stencil op tokens to softpipe tokens.
+ */
+static GLuint
+gl_stencil_op_to_sp(GLenum func)
+{
+ switch (func) {
+ case GL_KEEP:
+ return SP_STENCIL_OP_KEEP;
+ case GL_ZERO:
+ return SP_STENCIL_OP_ZERO;
+ case GL_REPLACE:
+ return SP_STENCIL_OP_REPLACE;
+ case GL_INCR:
+ return SP_STENCIL_OP_INCR;
+ case GL_DECR:
+ return SP_STENCIL_OP_DECR;
+ case GL_INCR_WRAP:
+ return SP_STENCIL_OP_INCR_WRAP;
+ case GL_DECR_WRAP:
+ return SP_STENCIL_OP_DECR_WRAP;
+ case GL_INVERT:
+ return SP_STENCIL_OP_INVERT;
+ default:
+ assert("invalid GL token in gl_stencil_op_to_sp()" == NULL);
+ return 0;
+ }
+}
+
+
+static void
+update_stencil( struct st_context *st )
+{
+ struct softpipe_stencil_state stencil;
+
+ memset(&stencil, 0, sizeof(stencil));
+
+ if (st->ctx->Stencil.Enabled) {
+ stencil.front_enabled = 1;
+ stencil.front_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[0]);
+ stencil.front_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[0]);
+ stencil.front_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[0]);
+ stencil.front_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[0]);
+ stencil.ref_value[0] = st->ctx->Stencil.Ref[0];
+ stencil.value_mask[0] = st->ctx->Stencil.ValueMask[0];
+ stencil.write_mask[0] = st->ctx->Stencil.WriteMask[0];
+ if (st->ctx->Stencil.TestTwoSide) {
+ stencil.back_enabled = 1;
+ stencil.back_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[1]);
+ stencil.back_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[1]);
+ stencil.back_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[1]);
+ stencil.back_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[1]);
+ stencil.ref_value[1] = st->ctx->Stencil.Ref[1];
+ stencil.value_mask[1] = st->ctx->Stencil.ValueMask[1];
+ stencil.write_mask[1] = st->ctx->Stencil.WriteMask[1];
+ }
+ stencil.clear_value = st->ctx->Stencil.Clear;
+ }
+
+ if (memcmp(&stencil, &st->state.stencil, sizeof(stencil)) != 0) {
+ /* state has changed */
+ st->state.stencil = stencil; /* struct copy */
+ st->softpipe->set_stencil_state(st->softpipe, &stencil); /* set new state */
+ }
+}
+
+
+const struct st_tracked_state st_update_stencil = {
+ .dirty = {
+ .mesa = (_NEW_STENCIL),
+ .st = 0,
+ },
+ .update = update_stencil
+};
+
+
+
+
+
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