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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "cgif.h"
#define WIDTH 2
#define HEIGHT 2
int main(void) {
CGIF* pGIF;
CGIF_Config gConfig;
CGIF_FrameConfig fConfig;
uint8_t* pImageData;
uint8_t aPalette[] = {
0x00, 0xFF, 0x00, // green
0xFF, 0xFF, 0xFF, // white
};
cgif_result r;
memset(&gConfig, 0, sizeof(CGIF_Config));
memset(&fConfig, 0, sizeof(CGIF_FrameConfig));
gConfig.attrFlags = CGIF_ATTR_IS_ANIMATED;
gConfig.genFlags = CGIF_GEN_KEEP_IDENT_FRAMES;
gConfig.width = WIDTH;
gConfig.height = HEIGHT;
gConfig.pGlobalPalette = aPalette;
gConfig.numGlobalPaletteEntries = 2;
gConfig.path = "user_trans_diff_area.gif";
//
// create new GIF
pGIF = cgif_newgif(&gConfig);
if(pGIF == NULL) {
fputs("failed to create new GIF via cgif_newgif()\n", stderr);
return 1;
}
//
// add frames to GIF
pImageData = malloc(WIDTH * HEIGHT);
memset(pImageData, 0, WIDTH * HEIGHT);
fConfig.pImageData = pImageData;
fConfig.delay = 500;
cgif_addframe(pGIF, &fConfig);
fConfig.attrFlags = CGIF_FRAME_ATTR_HAS_SET_TRANS;
fConfig.genFlags = CGIF_FRAME_GEN_USE_DIFF_WINDOW;
fConfig.transIndex = 1;
// set everything to transparent (frame from before shines through)
memset(pImageData, 1, WIDTH * HEIGHT);
r = cgif_addframe(pGIF, &fConfig);
free(pImageData);
//
// write GIF to file
r = cgif_close(pGIF);
// check for errors
if(r != CGIF_OK) {
fprintf(stderr, "failed to create GIF. error code: %d\n", r);
return 2;
}
return 0;
}
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