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