1 files changed, 140 insertions, 0 deletions
diff --git a/mesalib/src/mesa/swrast/s_feedback.c b/mesalib/src/mesa/swrast/s_feedback.c
new file mode 100644
index 000000000..47ed25ee1
--- /dev/null
+++ b/mesalib/src/mesa/swrast/s_feedback.c
@@ -0,0 +1,140 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.0
+ *
+ * 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 "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/enums.h"
+#include "main/feedback.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_triangle.h"
+
+
+
+static void
+feedback_vertex(GLcontext * ctx, const SWvertex * v, const SWvertex * pv)
+{
+   GLfloat win[4];
+   const GLfloat *vtc = v->attrib[FRAG_ATTRIB_TEX0];
+   const GLfloat *color = v->attrib[FRAG_ATTRIB_COL0];
+
+   win[0] = v->attrib[FRAG_ATTRIB_WPOS][0];
+   win[1] = v->attrib[FRAG_ATTRIB_WPOS][1];
+   win[2] = v->attrib[FRAG_ATTRIB_WPOS][2] / ctx->DrawBuffer->_DepthMaxF;
+   win[3] = 1.0F / v->attrib[FRAG_ATTRIB_WPOS][3];
+
+   _mesa_feedback_vertex(ctx, win, color, v->attrib[FRAG_ATTRIB_CI][0], vtc);
+}
+
+
+/*
+ * Put triangle in feedback buffer.
+ */
+void
+_swrast_feedback_triangle(GLcontext *ctx, const SWvertex *v0,
+                          const SWvertex *v1, const SWvertex *v2)
+{
+   if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
+      _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN);
+      _mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */
+
+      if (ctx->Light.ShadeModel == GL_SMOOTH) {
+         feedback_vertex(ctx, v0, v0);
+         feedback_vertex(ctx, v1, v1);
+         feedback_vertex(ctx, v2, v2);
+      }
+      else {
+         feedback_vertex(ctx, v0, v2);
+         feedback_vertex(ctx, v1, v2);
+         feedback_vertex(ctx, v2, v2);
+      }
+   }
+}
+
+
+void
+_swrast_feedback_line(GLcontext *ctx, const SWvertex *v0,
+                      const SWvertex *v1)
+{
+   GLenum token = GL_LINE_TOKEN;
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (swrast->StippleCounter == 0)
+      token = GL_LINE_RESET_TOKEN;
+
+   _mesa_feedback_token(ctx, (GLfloat) (GLint) token);
+
+   if (ctx->Light.ShadeModel == GL_SMOOTH) {
+      feedback_vertex(ctx, v0, v0);
+      feedback_vertex(ctx, v1, v1);
+   }
+   else {
+      feedback_vertex(ctx, v0, v1);
+      feedback_vertex(ctx, v1, v1);
+   }
+
+   swrast->StippleCounter++;
+}
+
+
+void
+_swrast_feedback_point(GLcontext *ctx, const SWvertex *v)
+{
+   _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN);
+   feedback_vertex(ctx, v, v);
+}
+
+
+void
+_swrast_select_triangle(GLcontext *ctx, const SWvertex *v0,
+                        const SWvertex *v1, const SWvertex *v2)
+{
+   if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
+      const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+
+      _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+      _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+      _mesa_update_hitflag( ctx, v2->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+   }
+}
+
+
+void
+_swrast_select_line(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1)
+{
+   const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+   _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+   _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+}
+
+
+void
+_swrast_select_point(GLcontext *ctx, const SWvertex *v)
+{
+   const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+   _mesa_update_hitflag( ctx, v->attrib[FRAG_ATTRIB_WPOS][2] * zs );
+}