1 files changed, 43 insertions, 0 deletions
diff --git a/src/mbgl/programs/program.hpp b/src/mbgl/programs/program.hpp
new file mode 100644
index 0000000000..e5aae24997
--- /dev/null
+++ b/src/mbgl/programs/program.hpp
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <mbgl/gl/program.hpp>
+#include <mbgl/programs/program_parameters.hpp>
+
+#include <sstream>
+#include <cassert>
+
+namespace mbgl {
+
+template <class Shaders, class Primitive, class Attributes, class Uniforms>
+class Program : public gl::Program<Primitive, Attributes, Uniforms> {
+public:
+    using ParentType = gl::Program<Primitive, Attributes, Uniforms>;
+
+    Program(gl::Context& context, const ProgramParameters& programParameters)
+        : ParentType(context, vertexSource(programParameters), fragmentSource(programParameters))
+        {}
+    
+    static std::string pixelRatioDefine(const ProgramParameters& parameters) {
+        std::ostringstream pixelRatioSS;
+        pixelRatioSS.imbue(std::locale("C"));
+        pixelRatioSS.setf(std::ios_base::showpoint);
+        pixelRatioSS << parameters.pixelRatio;
+        return std::string("#define DEVICE_PIXEL_RATIO ") + pixelRatioSS.str() + "\n";
+    }
+
+    static std::string fragmentSource(const ProgramParameters& parameters) {
+        std::string source = pixelRatioDefine(parameters) + Shaders::fragmentSource;
+        if (parameters.overdraw) {
+            assert(source.find("#ifdef OVERDRAW_INSPECTOR") != std::string::npos);
+            source.replace(source.find_first_of('\n'), 1, "\n#define OVERDRAW_INSPECTOR\n");
+        }
+        return source;
+    }
+
+    static std::string vertexSource(const ProgramParameters& parameters) {
+        return pixelRatioDefine(parameters) + Shaders::vertexSource;
+    }
+
+};
+
+} // namespace mbgl