From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz

[xscreensaver] / hacks / glx / engine.c

diff --git a/hacks/glx/engine.c b/hacks/glx/engine.c
index 77ebe21e4d4333c4ee77bce0fcfe4593e136a83d..f26f68d10ae86359885ff8169ed74f3850157cb5 100644 (file)
--- a/hacks/glx/engine.c
+++ b/hacks/glx/engine.c
@@ -24,9 +24,11 @@
 #ifdef STANDALONE
 #define DEFAULTS        "*delay:           30000        \n" \
                         "*showFPS:         False        \n" \
+                       "*suppressRotationAnimation: True\n" \
        "*titleFont:  -*-helvetica-medium-r-normal-*-*-180-*-*-*-*-*-*\n" \
 
 # define refresh_engine 0
+# define release_engine 0
 # include "xlockmore.h"              /* from the xscreensaver distribution */
 #else  /* !STANDALONE */
 # include "xlock.h"                  /* from the xlockmore distribution */
@@ -77,7 +79,7 @@ ENTRYPOINT ModeSpecOpt engine_opts = {countof(opts), opts, countof(vars), vars,
 
 #ifdef USE_MODULES
 ModStruct   engine_description =
-{"engine", "init_engine", "draw_engine", "release_engine",
+{"engine", "init_engine", "draw_engine", NULL,
  "draw_engine", "init_engine", NULL, &engine_opts,
  1000, 1, 2, 1, 4, 1.0, "",
  "A four stroke engine", 0, NULL};
@@ -326,8 +328,10 @@ static int cylinder (Engine *e, GLfloat x, GLfloat y, GLfloat z,
   for (a = sangle ; a <= angle || b <= angle ; a+= step) {
     y2=outer*(float)e->sin_table[a]+y;
     z2=outer*(float)e->cos_table[a]+z;
-    if (endcaps)
-       y2c[a] = y2; z2c[a] = z2; /* cache for later */
+    if (endcaps) {
+       y2c[a] = y2;
+       z2c[a] = z2; /* cache for later */
+    }
     if (tube) {
       Y2=inner*(float)e->sin_table[a]+y;
       Z2=inner*(float)e->cos_table[a]+z;
@@ -530,8 +534,8 @@ static int makepiston(Engine *e)
   int polys = 0;
   GLfloat colour[] = {0.6, 0.6, 0.6, 1.0};
   
-  if (e->piston_list) glDeleteLists(1, e->piston_list);
-  e->piston_list = glGenLists(1);
+  /* if (e->piston_list) glDeleteLists(1, e->piston_list); */
+  if (! e->piston_list) e->piston_list = glGenLists(1);
   glNewList(e->piston_list, GL_COMPILE);
   glRotatef(90, 0, 0, 1);
   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, colour);
@@ -598,8 +602,9 @@ static int boom(Engine *e, GLfloat x, GLfloat y, int s)
   return polys;
 }
 
-static int display(Engine *e)
+static int display(ModeInfo *mi)
 {
+ Engine *e = &engine[MI_SCREEN(mi)];
   int polys = 0;
   GLfloat zb, yb;
   float rightSide;
@@ -615,6 +620,15 @@ static int display(Engine *e)
             0.0, 1.0, 0.0);
   glPushMatrix();
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+  }
+# endif
+
   glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
   glLightfv(GL_LIGHT0, GL_SPECULAR, light_sp);
   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_sp);
@@ -774,8 +788,8 @@ static int makeshaft (Engine *e)
   float crankThick = 0.2;
   float crankDiam = 0.3;
 
-  if (e->shaft_list) glDeleteLists(1, e->shaft_list);
-  e->shaft_list = glGenLists(1);
+  /* if (e->shaft_list) glDeleteLists(1, e->shaft_list); */
+  if (! e->shaft_list) e->shaft_list = glGenLists(1);
   glNewList(e->shaft_list, GL_COMPILE);
 
   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
@@ -836,7 +850,8 @@ ENTRYPOINT void reshape_engine(ModeInfo *mi, int width, int height)
  glViewport(0,0,(GLint)width, (GLint) height);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
- glFrustum(-1.0,1.0,-1.0,1.0,1.5,70.0);
+/* glFrustum(-1.0,1.0,-1.0,1.0,1.5,70.0);*/
+ gluPerspective(40.0,((GLdouble)width)/height,1.5,70.0);
  glMatrixMode(GL_MODELVIEW);
  e->win_h = height; 
  e->win_w = width;
@@ -848,11 +863,7 @@ ENTRYPOINT void init_engine(ModeInfo *mi)
   int screen = MI_SCREEN(mi);
   Engine *e;
 
- if (engine == NULL) {
-   if ((engine = (Engine *) calloc(MI_NUM_SCREENS(mi),
-                                        sizeof(Engine))) == NULL)
-          return;
- }
+ MI_INIT(mi, engine, NULL);
  e = &engine[screen];
  e->window = MI_WINDOW(mi);
 
@@ -969,7 +980,7 @@ ENTRYPOINT void draw_engine(ModeInfo *mi)
   glXMakeCurrent(disp, w, *(e->glx_context));
 
 
-  mi->polygon_count = display(e);
+  mi->polygon_count = display(mi);
 
   glColor3f (1, 1, 0);
   if (do_titles)
@@ -982,16 +993,6 @@ ENTRYPOINT void draw_engine(ModeInfo *mi)
   glXSwapBuffers(disp, w);
 }
 
-ENTRYPOINT void
-release_engine(ModeInfo *mi) 
-{
-  if (engine != NULL) {
-   (void) free((void *) engine);
-   engine = NULL;
-  }
-  FreeAllGL(mi);
-}
-
 XSCREENSAVER_MODULE ("Engine", engine)
 
 #endif