From 9b7c843671144caf26cdff4341a2abaf1e31b325 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Sun, 5 Sep 1999 19:59:33 +0000
Subject: fixes for the mga driver

---
 src/mesa/main/matrix.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'src/mesa')

diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c
index c6459947fe..6a72da9acf 100644
--- a/src/mesa/main/matrix.c
+++ b/src/mesa/main/matrix.c
@@ -1,4 +1,4 @@
-/* $Id: matrix.c,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+/* $Id: matrix.c,v 1.2 1999/09/05 19:59:33 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -1311,6 +1311,11 @@ void gl_Viewport( GLcontext *ctx,
    ctx->Viewport.WindowMap.m[MAT_TX] = ctx->Viewport.WindowMap.m[MAT_SX] + x;
    ctx->Viewport.WindowMap.m[MAT_SY] = (GLfloat) height / 2.0F;
    ctx->Viewport.WindowMap.m[MAT_TY] = ctx->Viewport.WindowMap.m[MAT_SY] + y;
+   ctx->Viewport.WindowMap.m[MAT_SZ] = 0.5 * DEPTH_SCALE;
+   ctx->Viewport.WindowMap.m[MAT_TZ] = 0.5 * DEPTH_SCALE;
+
+   ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
+   ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
 
    ctx->ModelProjectWinMatrixUptodate = GL_FALSE;
    ctx->NewState |= NEW_VIEWPORT;
@@ -1400,6 +1405,14 @@ void gl_matrix_dtr( GLmatrix *m )
    }
 }
 
+void gl_matrix_set_identity( GLmatrix *m )
+{
+   MEMCPY( m->m, Identity, sizeof(Identity));
+   m->type = MATRIX_IDENTITY;
+   m->flags = MAT_DIRTY_DEPENDENTS;
+}
+
+
 void gl_matrix_alloc_inv( GLmatrix *m )
 {
    if (m->inv == 0) {
-- 
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