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aeslib: image assembly

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All 3 authentec drivers now use a shared image assembly function.
This commit is contained in:
Daniel Drake
2007-11-26 23:28:14 +00:00
parent e228f2c7da
commit 3479dee0e4
5 changed files with 33 additions and 44 deletions
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15
libfprint/aeslib.c
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@@ -93,3 +93,18 @@ int aes_write_regv(struct fp_img_dev *dev, struct aes_regwrite *regs,
return 0;
}
int aes_assemble_image(unsigned char *input, size_t width, size_t height,
unsigned char *output)
{
size_t frame_size = width * height;
size_t row, column;
for (column = 0; column < width; column++) {
for (row = 0; row < height; row += 2) {
output[width * row + column] = (*input & 0x07) * 36;
output[width * (row + 1) + column] = ((*input & 0x70) >> 4) * 36;
input++;
}
}
}