C++ gif encoder with good quality!
Use Neural-Net quantization algorithm by Anthony Dekker for generating colormap.
Use giflib for encoding gif.
Use stb_image for image loading in demo code.
Just copy gif directory to your project, and include GifEncoder.h, that's all.
#include "GifEncoder.h" int main() { // Suppose that you have three frame to be encoded const int w = 40; const int h = 40; uint32_t frame0[w * h]; uint32_t frame1[w * h]; uint32_t frame2[w * h]; for (int i = 0; i < w * h; ++i) { frame0[i] = 0xFF0000FF; // red frame1[i] = 0xFF00FF00; // green frame2[i] = 0xFFFF0000; // blue } int quality = 10; bool useGlobalColorMap = true; int loop = 0; int preAllocSize = useGlobalColorMap ? w * h * 3 * 3 : w * h * 3; int delay = 20; GifEncoder gifEncoder; if (!gifEncoder.open("test.gif", w, h, quality, useGlobalColorMap, loop, preAllocSize)) { fprintf(stderr, "Error open gif file\n"); return 1; } gifEncoder.push(GifEncoder::PIXEL_FORMAT_RGBA, (uint8_t *) frame0, w, h, delay); gifEncoder.push(GifEncoder::PIXEL_FORMAT_RGBA, (uint8_t *) frame1, w, h, delay); gifEncoder.push(GifEncoder::PIXEL_FORMAT_RGBA, (uint8_t *) frame2, w, h, delay); if (!gifEncoder.close()) { fprintf(stderr, "Error close gif file\n"); return 1; } }More complex demo code is in demo.cpp.
Use cmake to build demo.
cmake -DCMAKE_BUILD_TYPE=Release -B build . cmake --build build -- all ./build/egif_demoOpen Visual Studio Command Prompt and run these command
cmake -DCMAKE_BUILD_TYPE=Release -G "NMake Makefiles" -B build . cmake --build build -- all .\build\egif_demo.exeBuild it by yourself