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Convert greyscale inputs to RGB.

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This commit is contained in:
Alan De Smet 2019-03-22 14:02:10 -05:00 committed by Stefan Haustein
parent 287fde3341
commit 9943deed2c
1 changed files with 19 additions and 2 deletions
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21
src/main/cpp/tiv.cpp
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@ -397,6 +397,23 @@ void emit_usage() {
enum Mode {AUTO, THUMBNAILS, FULL_SIZE};
/* Wrapper around CImg<T>(const char*) to ensure the result has 3 channels as RGB
*/
cimg_library::CImg<unsigned char> load_rgb_CImg(const char * const filename) {
cimg_library::CImg<unsigned char> image(filename);
if(image.spectrum() == 1) {
// Greyscale. Just copy greyscale data to all channels
cimg_library::CImg<unsigned char> rgb_image(image.width(), image.height(), image.depth(), 3);
for(unsigned int chn = 0; chn < 3; chn++) {
rgb_image.draw_image(0, 0, 0,chn, image);
}
return rgb_image;
}
return image;
}
int main(int argc, char* argv[]) {
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
@ -452,7 +469,7 @@ int main(int argc, char* argv[]) {
if (mode == FULL_SIZE || (mode == AUTO && file_names.size() == 1)) {
for (unsigned int i = 0; i < file_names.size(); i++) {
try {
cimg_library::CImg<unsigned char> image(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) {
double scale = std::min(maxWidth / (double) image.width(), maxHeight / (double) image.height());
@ -479,7 +496,7 @@ int main(int argc, char* argv[]) {
while (index < file_names.size() && count < columns) {
std::string name = file_names[index++];
try {
cimg_library::CImg<unsigned char> original(name.c_str());
cimg_library::CImg<unsigned char> original = load_rgb_CImg(name.c_str());
unsigned int cut = name.find_last_of("/");
sb += cut == std::string::npos ? name : name.substr(cut + 1);
int th = original.height() * tw / original.width();