Ticket #43585: patch-opengl.diff

gui.cc

@@ -1 @@
-#include <iostream.h>
-#include <fstream.h>
+#include <iostream>
+#include <fstream>
 
 #include <GL/glut.h>
 #include "glHacks.h"
@@ -14 +14 @@
 int will_draw_dem = False;
 
 
+void xglutResize(int width, int height);
 // Prototype for our hack below.
 //
 void xglutKeepAspect(float width, float height);
@@ -69 +70 @@
 {
     int toggle = glutCreateMenu(mesh_toggle_menu);
 
-    glutAddMenuEntry("Draw DEM data", (int)&will_draw_dem);
+    glutAddMenuEntry("Draw DEM data", will_draw_dem);
 
 
-    int main = glutCreateMenu(mesh_main_menu);
+    glutCreateMenu(mesh_main_menu);
     glutAddSubMenu("Toggle", toggle);
 
     glutAddMenuEntry("Output Mesh EPS", MESH_MENU_EPS);
@@ -141 +142 @@
       glC(1.0, 0.15, 0.15);
       mesh->overEdges(draw_edge);
     glEnd();
+    glutSwapBuffers();
 }
 
 static inline void redisplay_all(int other)
@@ -400 +402 @@
 
     // ---------------------------------------------------------------------
 
-    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
+    // glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
+    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
     mesh_view = glutCreateWindow("TERRA: Mesh");
 
     xglutKeepAspect(DEM->width, DEM->height);
@@ -408 +411 @@
     create_mesh_menus();
 
     glutDisplayFunc(mesh_display);
+    glutReshapeFunc(xglutResize);
     glutMouseFunc(mesh_mouse);
 
     glMatrixMode(GL_PROJECTION);
@@ -433 +437 @@
 //
 ////////////////////////////////////////////////////////////////////////
 
-extern "C" {
-#include <GL/glutint.h>
-}
-
-void xglutKeepAspect(float width, float height)
+void xglutResize(int width, int height)
 {
-    Window win;
-    XSizeHints hints;
+    Map& map = mesh->getData();
+    real w = (real)map.width;
+    real h = (real)map.height;
+
+    // const float ar_origin = (float) WIDTH / (float) HEIGHT;
+    const float ar_origin = (float) w / (float) h;
+    const float ar_new = (float) width / (float) height;
+
+    float scale_w = (float) width / (float) w;
+    float scale_h = (float) height / (float) h;
+    if (ar_new > ar_origin) {
+        scale_w = scale_h;
+    } else {
+        scale_h = scale_w;
+    }
 
-    if( __glutCurrentWindow )
-    {
-        win = __glutCurrentWindow->win;
+    float margin_x = (width - w * scale_w) / 2;
+    float margin_y = (height - h * scale_h) / 2;
 
+    glViewport(margin_x, margin_y, w * scale_w, h * scale_h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho(0, w / ar_origin, 0, h / ar_origin, 0, 1.0);
 
-        hints.flags = PAspect;
-        hints.min_aspect.x = hints.max_aspect.x = (int)(1000*width);
-        hints.min_aspect.y = hints.max_aspect.y = (int)(1000*height);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity() ;
+}
 
-        XSetWMNormalHints(__glutDisplay, win, &hints);
-    }
+void xglutKeepAspect(float width, float height)
+{
+    int w = glutGet(GLUT_WINDOW_WIDTH);
+    glutReshapeWindow(w, static_cast<int>(floor(width*(height/w)+0.5)));
 }