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Extract size-to-fit logic for re-use in thumbnails.

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Alan De Smet 2019-03-22 22:06:10 -05:00 committed by Stefan Haustein
parent 3e57ebb80c
commit b58820e647
1 changed files with 22 additions and 2 deletions
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24
src/main/cpp/tiv.cpp
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@ -383,6 +383,26 @@ void emit_image(const cimg_library::CImg<unsigned char> & image, int flags) {
} }
struct size {
size(unsigned int in_width, unsigned int in_height) :
width(in_width), height(in_height) {
}
size(cimg_library::CImg<unsigned int> img) :
width(img.width()), height(img.height()) {
}
unsigned int width;
unsigned int height;
};
size operator*(size lhs, double scale) {
return size(lhs.width*scale, lhs.height*scale);
}
size fit_within(size container, size object) {
double scale = std::min(container.width / (double) object.width, container.height / (double) object.height);
return object * scale;
}
void emit_usage() { void emit_usage() {
std::cerr << "Terminal Image Viewer" << std::endl << std::endl; std::cerr << "Terminal Image Viewer" << std::endl << std::endl;
std::cerr << "usage: tiv [options] <image> [<image>...]" << std::endl << std::endl; std::cerr << "usage: tiv [options] <image> [<image>...]" << std::endl << std::endl;
@ -485,8 +505,8 @@ int main(int argc, char* argv[]) {
cimg_library::CImg<unsigned char> image = load_rgb_CImg(file_names[i].c_str()); cimg_library::CImg<unsigned char> image = load_rgb_CImg(file_names[i].c_str());
if (image.width() > maxWidth || image.height() > maxHeight) { if (image.width() > maxWidth || image.height() > maxHeight) {
double scale = std::min(maxWidth / (double) image.width(), maxHeight / (double) image.height()); size new_size = fit_within(size(maxWidth,maxHeight), size(image));
image.resize((int) (image.width() * scale), (int) (image.height() * scale), -100, -100, 5); image.resize(new_size.width, new_size.height, -100, -100, 5);
} }
emit_image(image, flags); emit_image(image, flags);
} catch(cimg_library::CImgIOException & e) { } catch(cimg_library::CImgIOException & e) {