27 lines
693 B
C
27 lines
693 B
C
#include <gint/image.h>
|
|
|
|
void image_set_pixel(image_t const *img, int x, int y, int value)
|
|
{
|
|
if(!image_valid(img))
|
|
return;
|
|
if((unsigned)x >= img->width || (unsigned)y >= img->height)
|
|
return;
|
|
|
|
void *data = img->data + y * img->stride;
|
|
uint8_t *data_u8 = data;
|
|
uint16_t *data_u16 = data;
|
|
|
|
if(IMAGE_IS_RGB16(img->format)) {
|
|
data_u16[x] = value;
|
|
}
|
|
else if(IMAGE_IS_P8(img->format)) {
|
|
data_u8[x] = value;
|
|
}
|
|
else if(IMAGE_IS_P4(img->format)) {
|
|
if(x & 1)
|
|
data_u8[x >> 1] = (data_u8[x >> 1] & 0xf0) | (value & 0x0f);
|
|
else
|
|
data_u8[x >> 1] = (data_u8[x >> 1] & 0x0f) | (value << 4);
|
|
}
|
|
}
|