minor api reduction

panda/src/tinydisplay/light.c

@@ -8,23 +8,7 @@ static inline float clampf(float a,float min,float max)
   else return a;
 }
 
-void gl_enable_disable_light(GLContext *c,int light,int v)
-{
-  GLLight *l=&c->lights[light];
-  if (v && !l->enabled) {
-    l->enabled=1;
-    l->next=c->first_light;
-    c->first_light=l;
-    l->prev=NULL;
-  } else if (!v && l->enabled) {
-    l->enabled=0;
-    if (l->prev == NULL) c->first_light=l->next;
-    else l->prev->next=l->next;
-    if (l->next != NULL) l->next->prev=l->prev;
-  }
-}
-
-/* non optimized lightening model */
+/* non optimized lighting model */
 void gl_shade_vertex(GLContext *c,GLVertex *v)
 {
   float R,G,B,A;

panda/src/tinydisplay/tinyGraphicsStateGuardian.cxx

@@ -1643,7 +1643,6 @@ do_issue_light() {
   GLLight *gl_light = _c->first_light;
   while (gl_light != (GLLight *)NULL) {
     GLLight *next = gl_light->next;
-    gl_light->enabled = false;
     gl_light->next = NULL;
     gl_light = next;
   }
@@ -1675,7 +1674,6 @@ do_issue_light() {
         nassertv(num_enabled < MAX_LIGHTS);
         GLLight *gl_light = &_c->lights[num_enabled];
         memset(gl_light, 0, sizeof(GLLight));
-        gl_light->enabled = true;
 
         gl_light->next = _c->first_light;
         _c->first_light = gl_light;

panda/src/tinydisplay/zgl.h

@@ -59,9 +59,7 @@ typedef struct GLLight {
   float cos_spot_cutoff;
   V3 norm_spot_direction;
   V3 norm_position;
-  /* we use a linked list to know which are the enabled lights */
-  int enabled;
-  struct GLLight *next,*prev;
+  struct GLLight *next;
 } GLLight;
 
 typedef struct GLMaterial {
@@ -125,13 +123,6 @@ typedef struct GLTexture {
   int s_max, t_max;
 } GLTexture;
 
-/* shared state */
-
-typedef struct GLSharedState {
-  GLList **lists;
-  GLTexture **texture_hash_table;
-} GLSharedState;
-
 struct GLContext;
 
 typedef void (*gl_draw_triangle_func)(struct GLContext *c,