Comments (1)
I found out the image is successfully displayed if i use the following function:
static struct nk_image
icon_load(const char *filename)
{
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
unsigned char* data = malloc(4 * 8 * 8 * sizeof(char));
/* define image data: 4 RGBA channels, with 8 x 8 texels: */
for (int i = 0; i < 4 * 8 * 8; i += 4)
{
data[i + 0] = (int)(4 * i) % 256;
data[i + 1] = (int)(4 * i) % 256;
data[i + 2] = (int)(4 * i) % 256;
data[i + 3] = (int)(4 * i) % 256;
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (data == NULL) printf("data is NULL!\n");
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
free(data);
return nk_image_id((int)tex);
}
closed as solved :)
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