1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "cgif.h"
#define WIDTH 1024
#define HEIGHT 1024
/* Small helper functions to initialize GIF- and frame-configuration */
static void initGIFConfig(CGIF_Config* pConfig, char* path, uint16_t width, uint16_t height, uint8_t* pPalette, uint16_t numColors) {
memset(pConfig, 0, sizeof(CGIF_Config));
pConfig->width = width;
pConfig->height = height;
pConfig->pGlobalPalette = pPalette;
pConfig->numGlobalPaletteEntries = numColors;
pConfig->path = path;
}
static void initFrameConfig(CGIF_FrameConfig* pConfig, uint8_t* pImageData) {
memset(pConfig, 0, sizeof(CGIF_FrameConfig));
pConfig->pImageData = pImageData;
}
/* This is an example code that creates a GIF-image with random pixels. */
int main(void) {
CGIF* pGIF; // struct containing the GIF
CGIF_Config gConfig; // global configuration parameters for the GIF
CGIF_FrameConfig fConfig; // configuration parameters for a frame
uint8_t* pImageData; // image data (an array of color-indices)
uint8_t aPalette[] = {0xFF, 0x00, 0x00, // red
0x00, 0xFF, 0x00, // green
0x00, 0x00, 0xFF}; // blue
uint16_t numColors = 3; // number of colors in aPalette (up to 256 possible)
// initialize the GIF-configuration and create a new GIF
initGIFConfig(&gConfig, "example_cgif.gif", WIDTH, HEIGHT, aPalette, numColors);
pGIF = cgif_newgif(&gConfig);
// create image frame with stripe pattern
pImageData = malloc(WIDTH * HEIGHT); // allocate memory for image data
for (int i = 0; i < (WIDTH * HEIGHT); ++i) { // Generate pattern
pImageData[i] = (unsigned char)((i % WIDTH)/4 % numColors); // stripe pattern (4 pixels per stripe)
}
// add frame to GIF
initFrameConfig(&fConfig, pImageData); // initialize the frame-configuration
cgif_addframe(pGIF, &fConfig); // add a new frame to the GIF
free(pImageData); // free image data when frame is added
// close GIF and free allocated space
cgif_close(pGIF);
return 0;
}
|
