46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
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gif-h
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=====
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This one-header library offers a simple, very limited way to create animated GIFs directly in code.
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Those looking for particular cleverness are likely to be disappointed; it's pretty much a straight-ahead
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implementation of the GIF format with optional Floyd-Steinberg dithering. (It does at least use delta
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encoding - only the changed portions of each frame are saved.)
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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.
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Only RGBA8 is currently supported as an input format. (The alpha is ignored.)
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Email me : ctangora -at- gmail -dot- com
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Usage:
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-------------------
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Create a GifWriter struct.
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Pass the struct to GifBegin() to initialize values and write the file header.
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Pass frames of the animation to GifWriteFrame().
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Finally, call GifEnd() to close the file handle and free memory.
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#include <vector>
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#include <cstdint>
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#include <gif.h>
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int main()
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{
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int width = 100;
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int height = 200;
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std::vector<uint8_t> black(width * height * 4, 0);
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std::vector<uint8_t> white(width * height * 4, 255);
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auto fileName = "bwgif.gif";
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int delay = 100;
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GifWriter g;
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GifBegin(&g, fileName, width, height, delay);
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GifWriteFrame(&g, black.data(), width, height, delay);
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GifWriteFrame(&g, white.data(), width, height, delay);
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GifEnd(&g);
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return 0;
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}
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