1 files changed, 0 insertions, 70 deletions
diff --git a/platform/default/image.cpp b/platform/default/image.cpp
index 84db1e9c71..ad9d83a08d 100644
--- a/platform/default/image.cpp
+++ b/platform/default/image.cpp
@@ -2,78 +2,8 @@
 #include <mbgl/util/string.hpp>
 #include <mbgl/util/premultiply.hpp>
 
-#include <png.h>
-
-template<size_t max, typename... Args>
-static std::string sprintf(const char *msg, Args... args) {
-    char res[max];
-    int len = snprintf(res, sizeof(res), msg, args...);
-    return std::string(res, len);
-}
-
-const static bool png_version_check __attribute__((unused)) = []() {
-    const png_uint_32 version = png_access_version_number();
-    if (version != PNG_LIBPNG_VER) {
-        throw std::runtime_error(sprintf<96>(
-            "libpng version mismatch: headers report %d.%d.%d, but library reports %d.%d.%d",
-            PNG_LIBPNG_VER / 10000, (PNG_LIBPNG_VER / 100) % 100, PNG_LIBPNG_VER % 100,
-            version / 10000, (version / 100) % 100, version % 100));
-    }
-    return true;
-}();
-
 namespace mbgl {
 
-std::string encodePNG(const PremultipliedImage& pre) {
-    PremultipliedImage copy(pre.size);
-    std::copy(pre.data.get(), pre.data.get() + pre.bytes(), copy.data.get());
-
-    UnassociatedImage src = util::unpremultiply(std::move(copy));
-
-    png_voidp error_ptr = nullptr;
-    png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, error_ptr, nullptr, nullptr);
-    if (!png_ptr) {
-        throw std::runtime_error("couldn't create png_ptr");
-    }
-
-    png_infop info_ptr = png_create_info_struct(png_ptr);
-    if (!png_ptr) {
-        png_destroy_write_struct(&png_ptr, (png_infopp)nullptr);
-        throw std::runtime_error("couldn't create info_ptr");
-    }
-
-    png_set_IHDR(png_ptr, info_ptr, src.size.width, src.size.height, 8, PNG_COLOR_TYPE_RGB_ALPHA,
-                 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
-
-    jmp_buf *jmp_context = (jmp_buf *)png_get_error_ptr(png_ptr);
-    if (jmp_context) {
-        png_destroy_write_struct(&png_ptr, &info_ptr);
-        throw std::runtime_error("png error");
-    }
-
-    std::string result;
-    png_set_write_fn(png_ptr, &result, [](png_structp png_ptr_, png_bytep data, png_size_t length) {
-        std::string *out = static_cast<std::string *>(png_get_io_ptr(png_ptr_));
-        out->append(reinterpret_cast<char *>(data), length);
-    }, nullptr);
-
-    struct ptrs {
-        ptrs(size_t count) : rows(new png_bytep[count]) {}
-        ~ptrs() { delete[] rows; }
-        png_bytep *rows = nullptr;
-    } pointers(src.size.height);
-
-    for (size_t i = 0; i < src.size.height; i++) {
-        pointers.rows[i] = src.data.get() + src.stride() * i;
-    }
-
-    png_set_rows(png_ptr, info_ptr, pointers.rows);
-    png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, nullptr);
-    png_destroy_write_struct(&png_ptr, &info_ptr);
-
-    return result;
-}
-
 #if !defined(__ANDROID__) && !defined(__APPLE__)
 PremultipliedImage decodeWebP(const uint8_t*, size_t);
 #endif // !defined(__ANDROID__) && !defined(__APPLE__)