From d7aa70eaad644f2892c60ce85539d5439e0804b2 Mon Sep 17 00:00:00 2001
From: Don Pellegrino <don@coffee.donpellegrino.com>
Date: Tue, 18 Aug 2009 00:07:24 +0000
Subject: Removed viewport state variable since this can be easily retrieved

from OpenGL's GL_VIEWPORT at any time.
---
diff --git a/src/controller/actions/zoom.c b/src/controller/actions/zoom.c
index d7f4140..b8e54cc 100644
--- a/src/controller/actions/zoom.c
+++ b/src/controller/actions/zoom.c
@@ -57,7 +57,7 @@ zoom (int x1, int y1, int x2, int y2)
   S.zoom.coords[2] = fmin (start_position[1], end_position[1]);
   S.zoom.coords[3] = fmax (start_position[1], end_position[1]);
   
-  reshape (S.viewport.w, S.viewport.h);
+  reshape (viewport[2], viewport[3]);
   
   glutPostRedisplay ();
   
diff --git a/src/controller/callbacks/keyboard.c b/src/controller/callbacks/keyboard.c
index cc917e7..9967ad3 100644
--- a/src/controller/callbacks/keyboard.c
+++ b/src/controller/callbacks/keyboard.c
@@ -45,7 +45,11 @@ keyboard (unsigned char key, int x, int y)
        */
       pan_info_init (&S.pan);
       S.zoom.active = false;
-      reshape (S.viewport.w, S.viewport.h);
+     
+      GLint viewport[4];
+      glGetIntegerv (GL_VIEWPORT, viewport);
+      reshape (viewport[2], viewport[3]);
+
       glutPostRedisplay ();
       break;
 
diff --git a/src/controller/callbacks/reshape.c b/src/controller/callbacks/reshape.c
index 95e9329..2455ea3 100644
--- a/src/controller/callbacks/reshape.c
+++ b/src/controller/callbacks/reshape.c
@@ -41,9 +41,6 @@ reshape (int w, int h)
   // Set the viewport equal to the size of the window.
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
 
-  S.viewport.w = w;
-  S.viewport.h = h;
-
   density_legend_geometry ();
 
   return;
diff --git a/src/model/geometry/density_legend_geometry.c b/src/model/geometry/density_legend_geometry.c
index c437517..e5baa08 100644
--- a/src/model/geometry/density_legend_geometry.c
+++ b/src/model/geometry/density_legend_geometry.c
@@ -47,7 +47,10 @@ density_legend_geometry (void)
    * remains a fixed number of pixels tall when the window is resized
    * or zoomed.
    */
-  double legend_height = (*top - *bottom) / S.viewport.h * 10.0;
+  GLint viewport[4];
+  glGetIntegerv (GL_VIEWPORT, viewport);
+
+  double legend_height = (*top - *bottom) / viewport[3] * 10.0;
 
   a[0] = *left;
   a[1] = *top;
diff --git a/src/model/state/state.h b/src/model/state/state.h
index ac1e035..26141f2 100644
--- a/src/model/state/state.h
+++ b/src/model/state/state.h
@@ -78,15 +78,6 @@ typedef struct
   } ortho;
 
   /*
-   * Viewport size.
-   */
-  struct
-  {
-    int w;
-    int h;
-  } viewport;
-
-  /*
    * Buffer objects.
    */
   unsigned int buffers[1];
--
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