a594446ef0
Press key `I` (shift+`i`) to start a screen capture creating a gif with
the captured screen. Hit `I` again to stop the screen recording.
---
Add gif-h helper header only library
Copied from https://github.com/charlietangora/gif-h
3d2657b9ad
45 lines
1.4 KiB
Markdown
45 lines
1.4 KiB
Markdown
gif-h
|
|
=====
|
|
|
|
This one-header library offers a simple, very limited way to create animated GIFs directly in code.
|
|
Those looking for particular cleverness are likely to be disappointed; it's pretty much a straight-ahead
|
|
implementation of the GIF format with optional Floyd-Steinberg dithering. (It does at least use delta
|
|
encoding - only the changed portions of each frame are saved.)
|
|
|
|
So resulting files are often quite large. The hope is that it will be handy nonetheless as a quick and easily-integrated way for programs to spit out animations.
|
|
|
|
Only RGBA8 is currently supported as an input format. (The alpha is ignored.)
|
|
|
|
Email me : ctangora -at- gmail -dot- com
|
|
|
|
Usage:
|
|
-------------------
|
|
Create a GifWriter struct.
|
|
|
|
Pass the struct to GifBegin() to initialize values and write the file header.
|
|
|
|
Pass frames of the animation to GifWriteFrame().
|
|
|
|
Finally, call GifEnd() to close the file handle and free memory.
|
|
|
|
#include <vector>
|
|
#include <cstdint>
|
|
#include <gif.h>
|
|
int main()
|
|
{
|
|
int width = 100;
|
|
int height = 200;
|
|
std::vector<uint8_t> black(width * height * 4, 0);
|
|
std::vector<uint8_t> white(width * height * 4, 255);
|
|
|
|
auto fileName = "bwgif.gif";
|
|
int delay = 100;
|
|
GifWriter g;
|
|
GifBegin(&g, fileName, width, height, delay);
|
|
GifWriteFrame(&g, black.data(), width, height, delay);
|
|
GifWriteFrame(&g, white.data(), width, height, delay);
|
|
GifEnd(&g);
|
|
|
|
return 0;
|
|
}
|
|
|