87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
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#include "lodepng.h"
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#include <rlottie.h>
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#include<iostream>
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#include<string>
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#include<vector>
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#include<array>
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void encodePNG(const char* filename, std::vector<unsigned char>& image, unsigned width, unsigned height) {
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unsigned error = lodepng::encode(filename, image, width, height);
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if(error) std::cout << "encoder error " << error << ": "<< lodepng_error_text(error) << std::endl;
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}
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void renderFrame(size_t i, rlottie::Surface &s)
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{
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uint8_t *buffer = reinterpret_cast<uint8_t *>(s.buffer());
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char filename [50];
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sprintf (filename, "frame-%ld.png", i + 1);
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std::cout << "Working on " << filename << std::endl;
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unsigned width = s.width(), height = s.height();
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std::vector<unsigned char> image;
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image.resize(width * height * 4);
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for(unsigned y = 0; y < height; y++)
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for(unsigned x = 0; x < width; x++) {
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uint32_t i = 4 * width * y + 4 * x;
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unsigned char r = buffer[i+2];
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unsigned char g = buffer[i+1];
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unsigned char b = buffer[i];
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unsigned char a = buffer[i+3];
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image[4 * width * y + 4 * x + 0] = r;
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image[4 * width * y + 4 * x + 1] = g;
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image[4 * width * y + 4 * x + 2] = b;
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image[4 * width * y + 4 * x + 3] = a;
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}
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encodePNG(filename, image, width, height);
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}
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void intro() {
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std::cout<<"Welcome to LFE.";
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std::cout<<"https://gitdab.com/distok/lfe | Licensed MIT";
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}
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int help() {
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std::cout<<"Usage: \n lfe [lottieFileName] [Resolution]\n\nExamples: \n $ lfe input.json\n $ lfe input.json 200x200\n";
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return 1;
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}
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int main(int argc, char **argv)
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{
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intro();
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char *path{nullptr};
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size_t w = 500;
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size_t h = 500;
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if (argc > 1) path = argv[1];
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if (argc > 2) {
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char tmp[20];
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char *x = strstr(argv[2], "x");
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if (x) {
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snprintf(tmp, x - argv[2] + 1, "%s", argv[2]);
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w = atoi(tmp);
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snprintf(tmp, sizeof(tmp), "%s", x + 1);
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h = atoi(tmp);
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}
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}
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if (!path) return help();
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auto player = rlottie::Animation::loadFromFile(path);
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if (!player) return help();
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auto buffer = std::unique_ptr<uint32_t[]>(new uint32_t[w * h]);
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size_t frameCount = player->totalFrame();
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for (size_t i = 0; i < frameCount ; i++) {
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rlottie::Surface surface(buffer.get(), w, h, w * 4);
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player->renderSync(i, surface);
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renderFrame(i, surface);
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}
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return 0;
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}
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