[general] moving ios and android project under ./platform folder

src/mbgl/programs/program_parameters.cpp

@@ -0,0 +1,25 @@
+#include <mbgl/programs/program_parameters.hpp>
+#include <mbgl/util/string.hpp>
+
+namespace mbgl {
+
+ProgramParameters::ProgramParameters(const float pixelRatio,
+                                     const bool overdraw)
+    : defines([&] {
+          std::string result;
+          result.reserve(32);
+          result += "#define DEVICE_PIXEL_RATIO ";
+          result += util::toString(pixelRatio, true);
+          result += '\n';
+          if (overdraw) {
+              result += "#define OVERDRAW_INSPECTOR\n";
+          }
+          return result;
+      }()) {
+}
+
+const std::string& ProgramParameters::getDefines() const {
+    return defines;
+}
+
+} // namespace mbgl