diff options
Diffstat (limited to 'src/mbgl/shaders/shaders.cpp')
-rw-r--r-- | src/mbgl/shaders/shaders.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/mbgl/shaders/shaders.cpp b/src/mbgl/shaders/shaders.cpp new file mode 100644 index 0000000000..f7f5b4d44f --- /dev/null +++ b/src/mbgl/shaders/shaders.cpp @@ -0,0 +1,33 @@ +#include <mbgl/shaders/shaders.hpp> +#include <mbgl/shaders/preludes.hpp> +#include <mbgl/programs/program_parameters.hpp> + +#include <cassert> +#include <sstream> + +namespace mbgl { +namespace shaders { + +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"; +} + +std::string fragmentSource(const ProgramParameters& parameters, const char* fragmentSource) { + std::string source = pixelRatioDefine(parameters) + fragmentPrelude + 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; +} + +std::string vertexSource(const ProgramParameters& parameters, const char* vertexSource) { + return pixelRatioDefine(parameters) + vertexPrelude + vertexSource; +} + +} // namespace shaders +} // namespace mbgl |