Add a system for creating Pipelines from loadable templates

[libs/gl.git] / source / pipelinebuilder.cpp

diff --git a/source/pipelinebuilder.cpp b/source/pipelinebuilder.cpp
new file mode 100644 (file)
index 0000000..cbf181f
--- /dev/null
+++ b/source/pipelinebuilder.cpp
@@ -0,0 +1,65 @@
+#include <msp/core/algorithm.h>
+#include <msp/core/maputils.h>
+#include "error.h"
+#include "pipeline.h"
+#include "pipelinebuilder.h"
+#include "pipelinetemplate.h"
+#include "renderbuffer.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+PipelineBuilder::PipelineBuilder(const PipelineTemplate &t):
+       tmpl(t)
+{
+       const vector<PipelineTemplate::Pass> &passes = tmpl.get_passes();
+       for(vector<PipelineTemplate::Pass>::const_iterator i=passes.begin(); i!=passes.end(); ++i)
+               renderables[i->renderable_name] = 0;
+}
+
+void PipelineBuilder::set_renderable(const string &name, Renderable &rend)
+{
+       get_item(renderables, name) = &rend;
+}
+
+void PipelineBuilder::build(Pipeline &pipeline) const
+{
+       pipeline.set_hdr(tmpl.get_hdr());
+       unsigned samples = min(tmpl.get_maximum_multisample(), Renderbuffer::get_max_samples());
+       if(samples<tmpl.get_required_multisample())
+               throw invalid_operation("PipelineBuilder::build");
+
+       pipeline.set_multisample(samples);
+
+       const PipelineTemplate::PassArray &passes = tmpl.get_passes();
+       for(PipelineTemplate::PassArray::const_iterator i=passes.begin(); i!=passes.end(); ++i)
+       {
+               Renderable *renderable = get_item(renderables, i->renderable_name);
+               if(!renderable)
+                       continue;
+
+               Pipeline::Pass &pass = pipeline.add_pass(i->tag, *renderable);
+               pass.set_blend(i->blend.get());
+               pass.set_depth_test(i->depth_test.get());
+               pass.set_lighting(i->lighting.get());
+       }
+
+       const PipelineTemplate::PostProcessorArray &postprocs = tmpl.get_postprocessors();
+       for(PipelineTemplate::PostProcessorArray::const_iterator i=postprocs.begin(); i!=postprocs.end(); ++i)
+       {
+               PostProcessor *proc = (*i)->create(pipeline.get_width(), pipeline.get_height());
+               pipeline.add_postprocessor_owned(proc);
+       }
+}
+
+Pipeline *PipelineBuilder::build(const View &view) const
+{
+       RefPtr<Pipeline> pipeline = new Pipeline(view);
+       build(*pipeline);
+       return pipeline.release();
+}
+
+} // namespace GL
+} // namespace Msp