X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogramdata.cpp;h=5f124a907fc8eebbb034d25cddb5ba475c67c022;hp=a0e0e8bc61376b814f28af1439f01329d8e7e61e;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=72a13418cc19e750abf3f8d8a52aea5e1abe4983

diff --git a/source/programdata.cpp b/source/programdata.cpp
index a0e0e8bc..5f124a90 100644
--- a/source/programdata.cpp
+++ b/source/programdata.cpp
@@ -1,5 +1,7 @@
 #include <msp/core/maputils.h>
+#include <msp/debug/demangle.h>
 #include <msp/gl/extensions/arb_direct_state_access.h>
+#include <msp/io/print.h>
 #include "buffer.h"
 #include "color.h"
 #include "error.h"
@@ -24,28 +26,40 @@ ProgramData::ProgramData(const Program *p):
 
 // Blocks are intentionally left uncopied
 ProgramData::ProgramData(const ProgramData &other):
-	tied_program(0),
-	uniform_slots(other.uniform_slots),
+	tied_program(other.tied_program),
 	uniforms(other.uniforms),
 	last_block(0),
 	buffer(0),
 	dirty(0)
 {
-	for(vector<Uniform *>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
-		*i = (*i)->clone();
+	for(vector<NamedUniform>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		i->value = i->value->clone();
 }
 
-ProgramData &ProgramData::operator=(const ProgramData &other)
+ProgramData::ProgramData(const ProgramData &other, const Program *p):
+	tied_program(p),
+	last_block(0),
+	buffer(0),
+	dirty(0)
 {
-	for(vector<Uniform *>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
-		delete *i;
-	uniforms.clear();
+	if(tied_program)
+	{
+		for(vector<NamedUniform>::const_iterator i=other.uniforms.begin(); i!=other.uniforms.end(); ++i)
+			tied_program->get_uniform_info(i->name);
+	}
+
+	uniforms = other.uniforms;
+	for(vector<NamedUniform>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		i->value = i->value->clone();
+}
 
+ProgramData &ProgramData::operator=(const ProgramData &other)
+{
 	tied_program = other.tied_program;
 
-	uniform_slots = other.uniform_slots;
-	for(vector<Uniform *>::const_iterator i=other.uniforms.begin(); i!=other.uniforms.end(); ++i)
-		uniforms.push_back((*i)->clone());
+	uniforms = other.uniforms;
+	for(vector<NamedUniform>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		i->value = i->value->clone();
 
 	for(BlockMap::iterator i=blocks.begin(); i!=blocks.end(); ++i)
 		delete i->second.block;
@@ -60,10 +74,14 @@ ProgramData &ProgramData::operator=(const ProgramData &other)
 
 ProgramData::~ProgramData()
 {
-	for(vector<Uniform *>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
-		delete *i;
+	for(vector<NamedUniform>::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		delete i->value;
 	for(BlockMap::iterator i=blocks.begin(); i!=blocks.end(); ++i)
+	{
+		if(i->second.indices.type_flag==0xFE)
+			delete i->second.indices.dynamic.values;
 		delete i->second.block;
+	}
 	delete buffer;
 }
 
@@ -71,10 +89,11 @@ void ProgramData::uniform(const string &name, Uniform *uni)
 {
 	try
 	{
-		if(tied_program)
-			tied_program->get_uniform_info(name);
-		else if(name[name.size()-1]==']')
-			throw invalid_argument("ProgramData::uniform");
+		if(!validate_name(name))
+		{
+			delete uni;
+			return;
+		}
 	}
 	catch(...)
 	{
@@ -82,27 +101,88 @@ void ProgramData::uniform(const string &name, Uniform *uni)
 		throw;
 	}
 
-	SlotMap::iterator i = uniform_slots.find(name);
-	if(i!=uniform_slots.end())
+	int i = find_uniform_index(name);
+	if(i<0)
+		return add_uniform(name, uni);
+
+	uniforms[i].replace_value(uni);
+	dirty |= 1<<i;
+}
+
+template<typename T, typename V>
+void ProgramData::uniform(const string &name, V value)
+{
+	if(!validate_name(name))
+		return;
+
+	int i = find_uniform_index(name);
+	if(i<0)
+		return add_uniform(name, new T(value));
+
+	if(T *uni = dynamic_cast<T *>(uniforms[i].value))
+		uni->set(value);
+	else
+		uniforms[i].replace_value(new T(value));
+
+	dirty |= 1<<i;
+}
+
+template<typename T, typename V>
+void ProgramData::uniform_array(const string &name, unsigned n, V value)
+{
+	if(!validate_name(name))
+		return;
+
+	int i = find_uniform_index(name);
+	if(i<0)
+		return add_uniform(name, new UniformArray<T>(n, value));
+
+	UniformArray<T> *uni = dynamic_cast<UniformArray<T> *>(uniforms[i].value);
+	if(uni && n==uni->size())
+		uni->set(value);
+	else
+		uniforms[i].replace_value(new UniformArray<T>(n, value));
+
+	dirty |= 1<<i;
+}
+
+bool ProgramData::validate_name(const string &name) const
+{
+#ifdef DEBUG
+	try
+#endif
 	{
-		Uniform *&slot = uniforms[i->second];
-		/* UniformBlock does not copy the uniforms, so existing default blocks
-		will be left with stale pointers.  This is not a problem as long as no
-		one stores pointers to the blocks and expects them to stay valid. */
-		delete slot;
-		slot = uni;
-
-		if(i->second<MASK_BITS)
-			dirty |= 1<<i->second;
-		else  // Force a full update if the mask isn't wide enough
-			dirty = ALL_ONES;
+		if(tied_program)
+			tied_program->get_uniform_info(name);
+		else if(name[name.size()-1]==']')
+			throw invalid_argument("ProgramData::uniform");
+		return true;
 	}
-	else
+#ifdef DEBUG
+	catch(const exception &e)
+	{
+		IO::print(IO::cerr, "Error while setting uniform %s: %s: %s\n", name, Debug::demangle(typeid(e).name()), e.what());
+		return false;
+	}
+#endif
+}
+
+void ProgramData::add_uniform(const string &name, Uniform *uni)
+{
+	if(uniforms.size()>=MASK_BITS)
 	{
-		uniform_slots[name] = uniforms.size();
-		uniforms.push_back(uni);
-		dirty = ALL_ONES;
+		delete uni;
+		throw too_many_uniforms(name);
 	}
+
+	vector<NamedUniform>::iterator j = lower_bound(uniforms.begin(), uniforms.end(), name, uniform_name_compare);
+
+	NamedUniform nu;
+	nu.name = name;
+	nu.value = uni;
+	uniforms.insert(j, nu);
+
+	dirty = ALL_ONES;
 }
 
 void ProgramData::uniform(const string &name, const Uniform &u)
@@ -112,12 +192,12 @@ void ProgramData::uniform(const string &name, const Uniform &u)
 
 void ProgramData::uniform(const string &name, int v)
 {
-	uniform(name, new Uniform1i(v));
+	uniform<Uniform1i>(name, v);
 }
 
 void ProgramData::uniform(const string &name, float v)
 {
-	uniform(name, new Uniform1f(v));
+	uniform<Uniform1f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, int v0, int v1)
@@ -134,12 +214,12 @@ void ProgramData::uniform(const string &name, float v0, float v1)
 
 void ProgramData::uniform2(const string &name, const int *v)
 {
-	uniform(name, new Uniform2i(v));
+	uniform<Uniform2i>(name, v);
 }
 
 void ProgramData::uniform2(const string &name, const float *v)
 {
-	uniform(name, new Uniform2f(v));
+	uniform<Uniform2f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, int v0, int v1, int v2)
@@ -161,12 +241,12 @@ void ProgramData::uniform(const string &name, const Vector3 &v)
 
 void ProgramData::uniform3(const string &name, const int *v)
 {
-	uniform(name, new Uniform3i(v));
+	uniform<Uniform3i>(name, v);
 }
 
 void ProgramData::uniform3(const string &name, const float *v)
 {
-	uniform(name, new Uniform3f(v));
+	uniform<Uniform3f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, int v0, int v1, int v2, int v3)
@@ -193,12 +273,12 @@ void ProgramData::uniform(const string &name, const Color &c)
 
 void ProgramData::uniform4(const string &name, const int *v)
 {
-	uniform(name, new Uniform4i(v));
+	uniform<Uniform4i>(name, v);
 }
 
 void ProgramData::uniform4(const string &name, const float *v)
 {
-	uniform(name, new Uniform4f(v));
+	uniform<Uniform4f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 2, 2> &m)
@@ -208,7 +288,37 @@ void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 2, 2> &
 
 void ProgramData::uniform_matrix2(const string &name, const float *v)
 {
-	uniform(name, new UniformMatrix2x2f(v));
+	uniform<UniformMatrix2x2f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 2, 3> &m)
+{
+	uniform_matrix3x2(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix3x2(const string &name, const float *v)
+{
+	uniform<UniformMatrix3x2f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 2, 4> &m)
+{
+	uniform_matrix4x2(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix4x2(const string &name, const float *v)
+{
+	uniform<UniformMatrix4x2f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 3, 2> &m)
+{
+	uniform_matrix2x3(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix2x3(const string &name, const float *v)
+{
+	uniform<UniformMatrix2x3f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 3, 3> &m)
@@ -218,7 +328,37 @@ void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 3, 3> &
 
 void ProgramData::uniform_matrix3(const string &name, const float *v)
 {
-	uniform(name, new UniformMatrix3x3f(v));
+	uniform<UniformMatrix3x3f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 3, 4> &m)
+{
+	uniform_matrix4x3(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix4x3(const string &name, const float *v)
+{
+	uniform<UniformMatrix4x3f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 4, 2> &m)
+{
+	uniform_matrix2x4(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix2x4(const string &name, const float *v)
+{
+	uniform<UniformMatrix2x4f>(name, v);
+}
+
+void ProgramData::uniform(const string &name, const LinAl::Matrix<float, 4, 3> &m)
+{
+	uniform_matrix3x4(name, &m(0, 0));
+}
+
+void ProgramData::uniform_matrix3x4(const string &name, const float *v)
+{
+	uniform<UniformMatrix3x4f>(name, v);
 }
 
 void ProgramData::uniform(const string &name, const Matrix &m)
@@ -228,109 +368,176 @@ void ProgramData::uniform(const string &name, const Matrix &m)
 
 void ProgramData::uniform_matrix4(const string &name, const float *v)
 {
-	uniform(name, new UniformMatrix4x4f(v));
+	uniform<UniformMatrix4x4f>(name, v);
 }
 
 void ProgramData::uniform1_array(const string &name, unsigned n, const int *v)
 {
-	uniform(name, new UniformArray<Uniform1i>(n, v));
+	uniform_array<Uniform1i>(name, n, v);
 }
 
 void ProgramData::uniform1_array(const string &name, unsigned n, const float *v)
 {
-	uniform(name, new UniformArray<Uniform1f>(n, v));
+	uniform_array<Uniform1f>(name, n, v);
 }
 
 void ProgramData::uniform2_array(const string &name, unsigned n, const int *v)
 {
-	uniform(name, new UniformArray<Uniform2i>(n, v));
+	uniform_array<Uniform2i>(name, n, v);
 }
 
 void ProgramData::uniform2_array(const string &name, unsigned n, const float *v)
 {
-	uniform(name, new UniformArray<Uniform2f>(n, v));
+	uniform_array<Uniform2f>(name, n, v);
 }
 
 void ProgramData::uniform3_array(const string &name, unsigned n, const int *v)
 {
-	uniform(name, new UniformArray<Uniform3i>(n, v));
+	uniform_array<Uniform3i>(name, n, v);
 }
 
 void ProgramData::uniform3_array(const string &name, unsigned n, const float *v)
 {
-	uniform(name, new UniformArray<Uniform3f>(n, v));
+	uniform_array<Uniform3f>(name, n, v);
 }
 
 void ProgramData::uniform4_array(const string &name, unsigned n, const int *v)
 {
-	uniform(name, new UniformArray<Uniform4i>(n, v));
+	uniform_array<Uniform4i>(name, n, v);
 }
 
 void ProgramData::uniform4_array(const string &name, unsigned n, const float *v)
 {
-	uniform(name, new UniformArray<Uniform4f>(n, v));
+	uniform_array<Uniform4f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix2_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix2x2f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix3x2_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix3x2f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix4x2_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix4x2f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix2x3_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix2x3f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix3_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix3x3f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix4x3_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix4x3f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix2x4_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix2x4f>(name, n, v);
+}
+
+void ProgramData::uniform_matrix3x4_array(const string &name, unsigned n, const float *v)
+{
+	uniform_array<UniformMatrix3x4f>(name, n, v);
 }
 
 void ProgramData::uniform_matrix4_array(const string &name, unsigned n, const float *v)
 {
-	uniform(name, new UniformArray<UniformMatrix4x4f>(n, v));
+	uniform_array<UniformMatrix4x4f>(name, n, v);
 }
 
 void ProgramData::remove_uniform(const string &name)
 {
-	SlotMap::iterator i = uniform_slots.find(name);
-	if(i!=uniform_slots.end())
-	{
-		vector<Uniform *>::iterator j = uniforms.begin()+i->second;
-		delete *j;
-		uniforms.erase(j);
-
-		for(SlotMap::iterator k=uniform_slots.begin(); k!=uniform_slots.end(); ++k)
-			if(k->second>i->second)
-				--k->second;
+	vector<NamedUniform>::const_iterator i = lower_bound(uniforms.begin(), uniforms.end(), name, uniform_name_compare);
+	if(i==uniforms.end() || i->name!=name)
+		return;
 
-		uniform_slots.erase(i);
+	delete i->value;
+	uniforms.erase(i);
 
-		dirty = ALL_ONES;
-	}
+	dirty = ALL_ONES;
 }
 
 vector<string> ProgramData::get_uniform_names() const
 {
 	vector<string> names;
-	for(SlotMap::const_iterator i=uniform_slots.begin(); i!=uniform_slots.end(); ++i)
-		names.push_back(i->first);
+	names.reserve(uniforms.size());
+	for(vector<NamedUniform>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		names.push_back(i->name);
 	return names;
 }
 
 const Uniform &ProgramData::get_uniform(const string &name) const
 {
-	return *uniforms[get_item(uniform_slots, name)];
+	int i = find_uniform_index(name);
+	if(i<0)
+		throw key_error(name);
+	return *uniforms[i].value;
 }
 
-unsigned ProgramData::compute_slot_mask(const Program::UniformBlockInfo &block) const
+const Uniform *ProgramData::find_uniform(const string &name) const
 {
-	unsigned mask = 0;
-	for(vector<const Program::UniformInfo *>::const_iterator i=block.uniforms.begin(); i!=block.uniforms.end(); ++i)
-	{
-		SlotMap::const_iterator j = uniform_slots.find((*i)->name);
-		/* TODO issue a warning (or even error?) either here or in update_block
-		if all uniforms for a buffer-backed block are not found */
-		if(j!=uniform_slots.end() && j->second<MASK_BITS)
-			mask |= 1<<j->second;
-	}
+	int i = find_uniform_index(name);
+	return (i>=0 ? uniforms[i].value : 0);
+}
+
+bool ProgramData::uniform_name_compare(const NamedUniform &nu, const string &name)
+{
+	return nu.name<name;
+}
 
-	return mask;
+int ProgramData::find_uniform_index(const string &name) const
+{
+	vector<NamedUniform>::const_iterator i = lower_bound(uniforms.begin(), uniforms.end(), name, uniform_name_compare);
+	return ((i!=uniforms.end() && i->name==name) ? i-uniforms.begin() : -1);
 }
 
-void ProgramData::update_block(UniformBlock &block, const Program::UniformBlockInfo &info) const
+void ProgramData::update_block_uniform_indices(SharedBlock &block, const Program::UniformBlockInfo &info) const
 {
-	for(vector<const Program::UniformInfo *>::const_iterator i=info.uniforms.begin(); i!=info.uniforms.end(); ++i)
+	UInt8 *indices = block.indices.values;
+	if(info.uniforms.size()>16)
+	{
+		if(block.indices.type_flag==0xFD)
+		{
+			block.indices.dynamic.values = new UInt8[info.uniforms.size()];
+			block.indices.type_flag = 0xFE;
+		}
+		indices = block.indices.dynamic.values;
+	}
+
+	block.used = 0;
+	for(unsigned i=0; i<info.uniforms.size(); ++i)
 	{
-		SlotMap::const_iterator j = uniform_slots.find((*i)->name);
-		if(j!=uniform_slots.end())
-			block.attach(**i, *uniforms[j->second]);
+		int j = find_uniform_index(info.uniforms[i]->name);
+		if(j>=0)
+		{
+			indices[i] = j;
+			if(static_cast<unsigned>(j)<MASK_BITS)
+				block.used |= 1<<j;
+		}
+		else
+			indices[i] = 0xFF;
 	}
+
+	block.dirty = block.used;
+}
+
+void ProgramData::update_block(SharedBlock &block, const Program::UniformBlockInfo &info) const
+{
+	const UInt8 *indices = block.get_uniform_indices();
+	for(unsigned i=0; i<info.uniforms.size(); ++i)
+		if(indices[i]!=0xFF)
+			block.block->attach(*info.uniforms[i], *uniforms[indices[i]].value);
 }
 
 ProgramData::SharedBlock *ProgramData::get_shared_block(const Program::UniformBlockInfo &info) const
@@ -338,18 +545,32 @@ ProgramData::SharedBlock *ProgramData::get_shared_block(const Program::UniformBl
 	BlockMap::iterator i = blocks.find(info.layout_hash);
 	if(i==blocks.end())
 	{
-		unsigned used = compute_slot_mask(info);
-		if(!used)
+		bool any_found = false;
+		bool all_found = true;
+		for(vector<const Program::UniformInfo *>::const_iterator j=info.uniforms.begin(); j!=info.uniforms.end(); ++j)
+		{
+			if(find_uniform_index((*j)->name)>=0)
+				any_found = true;
+			else
+				all_found = false;
+		}
+
+		if(!any_found)
 			return 0;
+		else if(!all_found && info.bind_point>=0)
+		{
+#ifdef DEBUG
+			IO::print(IO::cerr, "Warning: not all uniforms for block %s are present\n", info.name);
+#else
+			throw incomplete_uniform_block(info.name);
+#endif
+		}
 
 		UniformBlock *block;
 		if(info.bind_point>=0)
 		{
 			if(!buffer)
-			{
 				buffer = new Buffer(UNIFORM_BUFFER);
-				buffer->set_usage(STREAM_DRAW);
-			}
 
 			block = new UniformBlock(info.data_size);
 			block->use_buffer(buffer, last_block);
@@ -358,7 +579,8 @@ ProgramData::SharedBlock *ProgramData::get_shared_block(const Program::UniformBl
 		else
 			block = new UniformBlock;
 
-		i = blocks.insert(BlockMap::value_type(info.layout_hash, SharedBlock(used, block))).first;
+		i = blocks.insert(BlockMap::value_type(info.layout_hash, SharedBlock(block))).first;
+		update_block_uniform_indices(i->second, info);
 	}
 
 	return &i->second;
@@ -379,7 +601,7 @@ void ProgramData::apply() const
 	{
 		/* If the global dirty flag affects this program, add it to per-program
 		dirty flags and clear the global flag.  A previously unseen program will
-		always cause this to happen. */
+		cause this to happen if there's any dirty uniforms. */
 		if(affected)
 		{
 			for(BlockMap::iterator i=blocks.begin(); i!=blocks.end(); ++i)
@@ -391,6 +613,7 @@ void ProgramData::apply() const
 
 		const Program::UniformBlockMap &prog_blocks = prog->get_uniform_blocks();
 
+		UniformBlock *old_last_block = last_block;
 		if(pu.dirty==ALL_ONES)
 		{
 			/* The set of uniforms has changed since this program was last used.
@@ -405,7 +628,7 @@ void ProgramData::apply() const
 				if(shared)
 				{
 					if(shared->dirty==ALL_ONES)
-						shared->used = compute_slot_mask(i->second);
+						update_block_uniform_indices(*shared, i->second);
 					pu.used |= shared->used;
 				}
 
@@ -421,7 +644,7 @@ void ProgramData::apply() const
 			if(!j->shared || !j->shared->dirty)
 				continue;
 
-			update_block(*j->block, i->second);
+			update_block(*j->shared, i->second);
 			j->shared->dirty = 0;
 			buffered_blocks_updated |= (j->bind_point>=0);
 		}
@@ -432,6 +655,22 @@ void ProgramData::apply() const
 		to avoid state thrashing. */
 		if(buffered_blocks_updated && !ARB_direct_state_access)
 			buffer->bind();
+
+		if(last_block!=old_last_block)
+		{
+			unsigned required_size = last_block->get_required_buffer_size();
+			if(last_block->get_required_buffer_size()>buffer->get_size())
+			{
+				if(buffer->get_size()>0)
+				{
+					delete buffer;
+					buffer = new Buffer(UNIFORM_BUFFER);
+					last_block->change_buffer(buffer);
+				}
+
+				buffer->storage(required_size);
+			}
+		}
 	}
 
 	for(vector<ProgramBlock>::iterator i=pu.blocks.begin(); i!=pu.blocks.end(); ++i)
@@ -440,12 +679,33 @@ void ProgramData::apply() const
 }
 
 
-ProgramData::SharedBlock::SharedBlock(unsigned u, UniformBlock *b):
-	used(u),
-	dirty(u),
-	block(b)
+ProgramData::NamedUniform::NamedUniform():
+	value(0)
 { }
 
+void ProgramData::NamedUniform::replace_value(Uniform *v)
+{
+	/* UniformBlock does not copy the uniforms, so existing default blocks
+	will be left with stale pointers.  This is not a problem as long as no
+	one stores pointers to the blocks and expects them to stay valid. */
+	delete value;
+	value = v;
+}
+
+
+ProgramData::SharedBlock::SharedBlock(UniformBlock *b):
+	used(0),
+	dirty(0),
+	block(b)
+{
+	indices.type_flag = 0xFD;
+}
+
+const UInt8 *ProgramData::SharedBlock::get_uniform_indices() const
+{
+	return (indices.type_flag==0xFE ? indices.dynamic.values : indices.values);
+}
+
 
 ProgramData::ProgramBlock::ProgramBlock():
 	bind_point(-1),
@@ -455,7 +715,7 @@ ProgramData::ProgramBlock::ProgramBlock():
 
 ProgramData::ProgramBlock::ProgramBlock(int p, SharedBlock *b):
 	bind_point(p),
-	block(b ? b->block : 0),
+	block((b && b->used) ? b->block : 0),
 	shared(b)
 { }