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#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
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