Use a generation number to track if ProgramData has changed

[libs/gl.git] / source / render / programdata.cpp

diff --git a/source/render/programdata.cpp b/source/render/programdata.cpp
index d934b48782c23ce181a5022b5fcfeb6009ad83b4..f3c6108c767284a9e158ee88df7fdd9a5986873d 100644 (file)
--- a/source/render/programdata.cpp
+++ b/source/render/programdata.cpp
@@ -20,6 +20,7 @@ namespace GL {
 
 ProgramData::ProgramData(const Program *p):
        tied_program(p),
+       generation(0),
        last_buffer_block(0),
        buffer(0),
        dirty(0)
@@ -29,6 +30,7 @@ ProgramData::ProgramData(const Program *p):
 ProgramData::ProgramData(const ProgramData &other):
        tied_program(other.tied_program),
        uniforms(other.uniforms),
+       generation(other.generation),
        last_buffer_block(0),
        buffer(0),
        dirty(0)
@@ -107,7 +109,7 @@ void ProgramData::uniform(Tag tag, Uniform *uni)
                return add_uniform(tag, uni);
 
        uniforms[i].replace_value(uni);
-       dirty |= 1<<i;
+       mark_dirty(1<<i);
 }
 
 template<typename T, typename V>
@@ -125,7 +127,7 @@ void ProgramData::uniform(Tag tag, V value)
        else
                uniforms[i].replace_value(new T(value));
 
-       dirty |= 1<<i;
+       mark_dirty(1<<i);
 }
 
 template<typename T, typename V>
@@ -144,7 +146,7 @@ void ProgramData::uniform_array(Tag tag, unsigned n, V value)
        else
                uniforms[i].replace_value(new UniformArray<T>(n, value));
 
-       dirty |= 1<<i;
+       mark_dirty(1<<i);
 }
 
 bool ProgramData::validate_tag(Tag tag) const
@@ -185,7 +187,14 @@ void ProgramData::add_uniform(Tag tag, Uniform *uni)
        nu.value = uni;
        uniforms.insert(j, nu);
 
-       dirty = ALL_ONES;
+       mark_dirty(ALL_ONES);
+}
+
+void ProgramData::mark_dirty(Mask bits)
+{
+       if(!dirty)
+               ++generation;
+       dirty |= bits;
 }
 
 void ProgramData::uniform(Tag tag, const Uniform &u)
@@ -428,7 +437,7 @@ void ProgramData::remove_uniform(Tag tag)
        delete i->value;
        uniforms.erase(i);
 
-       dirty = ALL_ONES;
+       mark_dirty(ALL_ONES);
 }
 
 vector<Tag> ProgramData::get_uniform_tags() const