Output the graph in dot form at finalize time.

[movit] / effect_chain.cpp

diff --git a/effect_chain.cpp b/effect_chain.cpp
index 1d84e897add7d95eeeba77267f90dba631743744..4f1900dadfa5e2847b7478ace9a0ba562e28c421 100644 (file)
--- a/effect_chain.cpp
+++ b/effect_chain.cpp
@@ -414,6 +414,26 @@ void EffectChain::construct_glsl_programs(Node *output)
        std::reverse(phases.begin(), phases.end());
 }
 
+void EffectChain::output_dot(const char *filename)
+{
+       FILE *fp = fopen(filename, "w");
+       if (fp == NULL) {
+               perror(filename);
+               exit(1);
+       }
+
+       fprintf(fp, "digraph G {\n");
+       for (unsigned i = 0; i < nodes.size(); ++i) {
+               fprintf(fp, "  n%ld [label=\"%s\"];\n", (long)nodes[i], nodes[i]->effect->effect_type_id().c_str());
+               for (unsigned j = 0; j < nodes[i]->outgoing_links.size(); ++j) {
+                       fprintf(fp, "  n%ld -> n%ld;\n", (long)nodes[i], (long)nodes[i]->outgoing_links[j]);
+               }
+       }
+       fprintf(fp, "}\n");
+
+       fclose(fp);
+}
+
 void EffectChain::find_output_size(Phase *phase)
 {
        Node *output_node = phase->effects.back();
@@ -453,6 +473,8 @@ void EffectChain::find_output_size(Phase *phase)
 
 void EffectChain::finalize()
 {
+       output_dot("final.dot");
+
        // Find the output effect. This is, simply, one that has no outgoing links.
        // If there are multiple ones, the graph is malformed (we do not support
        // multiple outputs right now).