Store the ambient occlusion rotate lookup texture in resources

diff --git a/source/effects/ambientocclusion.cpp b/source/effects/ambientocclusion.cpp
index bbff1f25b45d5c7bad60768e96be28f8b0bbf427..b4050aef92428ceeacf44a8924e4a48d07085279 100644 (file)
--- a/source/effects/ambientocclusion.cpp
+++ b/source/effects/ambientocclusion.cpp
@@ -13,6 +13,7 @@ namespace Msp {
 namespace GL {
 
 AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float):
+       rotate_lookup(get_or_create_rotate_lookup()),
        occlude_target(w, h, (RENDER_COLOR,R8)),
        occlude_shader(Resources::get_global().get<Program>("_ambientocclusion_occlude.glsl.shader")),
        combine_shader(Resources::get_global().get<Program>("_ambientocclusion_combine.glsl.shader")),
@@ -21,8 +22,26 @@ AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float):
        nearest_clamp_sampler(Resources::get_global().get<Sampler>("_nearest_clamp.samp")),
        nearest_sampler(Resources::get_global().get<Sampler>("_nearest.samp"))
 {
+       set_n_samples(16);
+       set_occlusion_radius(0.5f);
+       set_darkness(1.0f);
+       set_edge_depth_threshold(0.1f);
+}
+
+const Texture2D &AmbientOcclusion::get_or_create_rotate_lookup()
+{
+       Resources &resources = Resources::get_global();
+
+       static const string name = "_ambientocclusion_rotate.tex2d";
+       Texture2D *rotate_lookup = resources.find<Texture2D>(name);
+       if(rotate_lookup)
+               return *rotate_lookup;
+
+       rotate_lookup = new Texture2D;
+       rotate_lookup->storage(RGBA8, 4, 4, 1);
+       resources.add(name, rotate_lookup);
+
        unsigned seed = 1;
-       rotate_lookup.storage(RGBA8, 4, 4, 1);
        unsigned char data[64];
        for(unsigned i=0; i<16; ++i)
        {
@@ -34,12 +53,9 @@ AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float):
                data[i*4+2] = 255-s;
                data[i*4+3] = ((i+i/4)%2)*255;
        }
-       rotate_lookup.image(0, data);
+       rotate_lookup->image(0, data);
 
-       set_n_samples(16);
-       set_occlusion_radius(0.5f);
-       set_darkness(1.0f);
-       set_edge_depth_threshold(0.1f);
+       return *rotate_lookup;
 }
 
 float AmbientOcclusion::random(unsigned &seed)

diff --git a/source/effects/ambientocclusion.h b/source/effects/ambientocclusion.h
index 71a9270337a0d8517ab848ad2a9dd11dad22d548..61d4d4f3e44a48daf94468d684d26f14e4b19ba5 100644 (file)
--- a/source/effects/ambientocclusion.h
+++ b/source/effects/ambientocclusion.h
@@ -39,7 +39,7 @@ public:
        };
 
 private:
-       Texture2D rotate_lookup;
+       const Texture2D &rotate_lookup;
        RenderTarget occlude_target;
        const Program &occlude_shader;
        const Program &combine_shader;
@@ -53,6 +53,7 @@ public:
        AmbientOcclusion(unsigned, unsigned, float = 1.0f);
 
 private:
+       static const Texture2D &get_or_create_rotate_lookup();
        static float random(unsigned &);
 
 public: