임이지의 블로그

비트맵 데이터를 GIF를 저장해보자. 먼저 repo에서 header only https://github.com/charlietangora/gif-h 소스를 다운로드 받자. 기본 예제는 아래와 같다. #include #include #include int main() { int width = 100; int height = 200; std::vector black(width * height * 4, 0); std::vector white(width * height * 4, 255); auto fileName = "bwgif.gif"; int delay = 100; GifWriter g; GifBegin(&g, fileName, width, height, delay); GifWriteFrame(&g, bla..

멀티미디어/이미지(Image) 2021. 11. 2. 10:08

GIF formatByte Order: Little-endianGIF HeaderOffset Length Contents 0 3 bytes "GIF" 3 3 bytes "87a" or "89a" 6 2 bytes 8 2 bytes 10 1 byte bit 0: Global Color Table Flag (GCTF) bit 1..3: Color Resolution bit 4: Sort Flag to Global Color Table bit 5..7: Size of Global Color Table: 2^(1+n) 11 1 byte 12 1 byte 13 ? bytes ? bytes 1 bytes (0x3b) Image BlockOffset Length Contents 0 1 byte Image Separa..

멀티미디어/이미지(Image) 2018. 9. 4. 18:32