#include <msp/strings/lexicalcast.h>
#include "finalize.h"
#include "glsl_error.h"
+#include "reflect.h"
using namespace std;
namespace GL {
namespace SL {
+void LocationAllocator::apply(Module &module)
+{
+ for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
+ apply(*i);
+ allocate_locations("uniform");
+}
+
+void LocationAllocator::apply(Stage &stage)
+{
+ swap(used_locations["in"], used_locations["out"]);
+ used_locations["out"].clear();
+
+ stage.content.visit(*this);
+
+ allocate_locations("in");
+ allocate_locations("out");
+}
+
+void LocationAllocator::allocate_locations(const string &iface)
+{
+ vector<VariableDeclaration *>::iterator write = unplaced_variables.begin();
+ unsigned next = 0;
+ for(vector<VariableDeclaration *>::const_iterator i=unplaced_variables.begin(); i!=unplaced_variables.end(); ++i)
+ {
+ if((*i)->interface!=iface)
+ {
+ if(write!=i)
+ *write = *i;
+ ++write;
+ continue;
+ }
+
+ if((*i)->interface=="uniform")
+ {
+ map<string, unsigned>::const_iterator j = uniform_locations.find((*i)->name);
+ if(j!=uniform_locations.end())
+ {
+ add_location((*i)->layout, j->second);
+ continue;
+ }
+ }
+
+ set<unsigned> &used = used_locations[(*i)->interface];
+
+ unsigned size = LocationCounter().apply(**i);
+ while(1)
+ {
+ int blocking = -1;
+ for(unsigned j=0; j<size; ++j)
+ if(used.count(next+j))
+ blocking = next+j;
+ if(blocking<0)
+ break;
+ next = blocking+1;
+ }
+
+ add_location((*i)->layout, next);
+ if((*i)->interface=="uniform")
+ uniform_locations[(*i)->name] = next;
+
+ for(unsigned j=0; j<size; ++j)
+ used.insert(next+j);
+ next += size;
+ }
+
+ unplaced_variables.erase(write, unplaced_variables.end());
+}
+
+void LocationAllocator::add_location(RefPtr<Layout> &layout, unsigned location)
+{
+ if(!layout)
+ layout = new Layout;
+
+ Layout::Qualifier qual;
+ qual.name = "location";
+ qual.has_value = true;
+ qual.value = location;
+ layout->qualifiers.push_back(qual);
+}
+
+void LocationAllocator::visit(VariableDeclaration &var)
+{
+ if(!var.interface.empty() && var.name.compare(0, 3, "gl_"))
+ {
+ int location = (var.layout ? get_layout_value(*var.layout, "location") : -1);
+
+ if(location<0 && var.linked_declaration && var.linked_declaration->layout)
+ {
+ location = get_layout_value(*var.linked_declaration->layout, "location");
+ if(location>=0)
+ add_location(var.layout, location);
+ }
+
+ if(location>=0)
+ {
+ unsigned size = LocationCounter().apply(var);
+ for(unsigned i=0; i<size; ++i)
+ used_locations[var.interface].insert(location+i);
+ if(var.interface=="uniform")
+ uniform_locations[var.name] = location;
+ }
+ else
+ unplaced_variables.push_back(&var);
+ }
+}
+
+
PrecisionConverter::PrecisionConverter():
stage(0)
{ }
if(supports_stage(s.type))
{
s.content.visit(*this);
+ NodeRemover().apply(s, nodes_to_remove);
if(!stage->required_features.glsl_version)
stage->required_features.glsl_version = Version(1, (stage->required_features.gl_api==OPENGL_ES2 ? 0 : 10));
return check_version(Version(3, 0));
else if(check_version(Version(3, 30)))
return true;
- else
+ else if(check_version(Version(1, 30)))
return check_extension(&Features::arb_explicit_attrib_location);
+ else
+ return false;
+}
+
+bool LegacyConverter::supports_stage_interface_layouts() const
+{
+ if(features.gl_api==OPENGL_ES2)
+ return check_version(Version(3, 10));
+ else if(check_version(Version(4, 10)))
+ return true;
+ else
+ return check_extension(&Features::arb_separate_shader_objects);
}
bool LegacyConverter::supports_centroid_sampling() const
return check_extension(&Features::arb_gpu_shader5);
}
+bool LegacyConverter::supports_uniform_location() const
+{
+ if(features.gl_api==OPENGL_ES2)
+ return check_version(Version(3, 10));
+ else if(check_version(Version(4, 30)))
+ return true;
+ else
+ return check_extension(&Features::arb_explicit_uniform_location);
+}
+
void LegacyConverter::visit(VariableDeclaration &var)
{
- if(var.layout && !supports_interface_layouts())
+ if(var.layout)
{
- vector<Layout::Qualifier>::iterator i;
- for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->name!="location"); ++i) ;
- if(i!=var.layout->qualifiers.end())
+ for(vector<Layout::Qualifier>::const_iterator i=var.layout->qualifiers.begin(); i!=var.layout->qualifiers.end(); )
{
- if(stage->type==Stage::VERTEX && var.interface=="in")
- {
- stage->locations[var.name] = i->value;
- var.layout->qualifiers.erase(i);
- }
- else if(stage->type==Stage::FRAGMENT && var.interface=="out")
+ if(i->name=="location")
{
- if(check_extension(&Features::ext_gpu_shader4))
- stage->locations[var.name] = i->value;
- else if(i->value!=0)
- unsupported("EXT_gpu_shader4 required for multiple fragment shader outputs");
- var.layout->qualifiers.erase(i);
- }
+ bool supported = true;
+ bool external = false;
+ if(var.interface=="in")
+ {
+ external = (stage->type==Stage::VERTEX);
+ supported = (external ? supports_interface_layouts() : supports_stage_interface_layouts());
+ }
+ else if(var.interface=="out")
+ {
+ external = (stage->type==Stage::FRAGMENT);
+ supported = (external ? supports_interface_layouts() : supports_stage_interface_layouts());
+ if(external && !supported && !check_extension(&Features::ext_gpu_shader4))
+ {
+ external = false;
+ if(i->value!=0)
+ unsupported("EXT_gpu_shader4 required for multiple fragment shader outputs");
+ }
+ }
+ else if(var.interface=="uniform")
+ supported = supports_uniform_location();
- if(var.layout->qualifiers.empty())
- var.layout = 0;
+ if(!supported)
+ {
+ if(external)
+ stage->locations[var.name] = i->value;
+ i = var.layout->qualifiers.erase(i);
+ }
+ else
+ ++i;
+ }
+ else
+ ++i;
}
+
+ if(var.layout->qualifiers.empty())
+ var.layout = 0;
}
if(var.sampling=="centroid")
return false;
}
+bool LegacyConverter::supports_interface_block_location() const
+{
+ if(features.gl_api==OPENGL_ES2)
+ return check_version(Version(3, 20));
+ else if(check_version(Version(4, 40)))
+ return true;
+ else
+ return check_extension(&Features::arb_enhanced_layouts);
+}
+
void LegacyConverter::visit(InterfaceBlock &iface)
{
+ if(iface.layout)
+ {
+ for(vector<Layout::Qualifier>::const_iterator i=iface.layout->qualifiers.begin(); i!=iface.layout->qualifiers.end(); )
+ {
+ if(i->name=="location" && !supports_interface_block_location())
+ i = iface.layout->qualifiers.erase(i);
+ else
+ ++i;
+ }
+
+ if(iface.layout->qualifiers.empty())
+ iface.layout = 0;
+ }
+
if(!supports_interface_blocks(iface.interface) && iface.type_declaration)
{
if(!iface.instance_name.empty())
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