51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
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#ifndef __MAPNIK_COMPARE_IMAGES_HPP__
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#define __MAPNIK_COMPARE_IMAGES_HPP__
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#include <mapnik/graphics.hpp>
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#include <mapnik/image_data.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/image_reader.hpp>
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using namespace mapnik;
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namespace benchmark {
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bool compare_images(std::string const& src_fn,std::string const& dest_fn)
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{
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std::unique_ptr<mapnik::image_reader> reader1(mapnik::get_image_reader(dest_fn,"png"));
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if (!reader1.get())
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{
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throw mapnik::image_reader_exception("Failed to load: " + dest_fn);
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}
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std::shared_ptr<image_32> image_ptr1 = std::make_shared<image_32>(reader1->width(),reader1->height());
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reader1->read(0,0,image_ptr1->data());
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std::unique_ptr<mapnik::image_reader> reader2(mapnik::get_image_reader(src_fn,"png"));
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if (!reader2.get())
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{
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throw mapnik::image_reader_exception("Failed to load: " + src_fn);
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}
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std::shared_ptr<image_32> image_ptr2 = std::make_shared<image_32>(reader2->width(),reader2->height());
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reader2->read(0,0,image_ptr2->data());
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image_data_32 const& dest = image_ptr1->data();
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image_data_32 const& src = image_ptr2->data();
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unsigned int width = src.width();
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unsigned int height = src.height();
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if ((width != dest.width()) || height != dest.height()) return false;
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for (unsigned int y = 0; y < height; ++y)
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{
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const unsigned int* row_from = src.getRow(y);
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const unsigned int* row_to = dest.getRow(y);
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for (unsigned int x = 0; x < width; ++x)
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{
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if (row_from[x] != row_to[x]) return false;
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}
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}
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return true;
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}
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}
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#endif // __MAPNIK_COMPARE_IMAGES_HPP__
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