/**
* Blur image plane using a mask.
*
* @param source The image to have it's logo removed.
* @param destination Where the output image will be stored.
* @param source_stride How far apart (in memory) two consecutive lines are.
* @param destination Same as source_stride, but for the destination image.
* @param width Width of the image. This is the same for source and destination.
* @param height Height of the image. This is the same for source and destination.
* @param is_image_direct If the image is direct, then source and destination are
* the same and we can save a lot of time by not copying pixels that
* haven't changed.
* @param filter The image that stores the distance to the edge of the logo for
* each pixel.
* @param logo_start_x smallest x-coordinate that contains at least 1 logo pixel.
* @param logo_start_y smallest y-coordinate that contains at least 1 logo pixel.
* @param logo_end_x largest x-coordinate that contains at least 1 logo pixel.
* @param logo_end_y largest y-coordinate that contains at least 1 logo pixel.
*
* This function processes an entire plane. Pixels outside of the logo are copied
* to the output without change, and pixels inside the logo have the de-blurring
* function applied.
*/
static void blur_image(int ***mask,
const uint8_t *src_data, int src_linesize,
uint8_t *dst_data, int dst_linesize,
const uint8_t *mask_data, int mask_linesize,
int w, int h, int direct,
FFBoundingBox *bbox)
{
int x, y;
uint8_t *dst_line;
const uint8_t *src_line;
if (!direct)
av_image_copy_plane(dst_data, dst_linesize, src_data, src_linesize, w, h);
for (y = bbox->y1; y <= bbox->y2; y++) {
src_line = src_data + src_linesize * y;
dst_line = dst_data + dst_linesize * y;
for (x = bbox->x1; x <= bbox->x2; x++) {
if (mask_data[y * mask_linesize + x]) {
/* Only process if we are in the mask. */
dst_line[x] = blur_pixel(mask,
mask_data, mask_linesize,
dst_data, dst_linesize,
w, h, x, y);
} else {
/* Else just copy the data. */
if (!direct)
dst_line[x] = src_line[x];
}
}
}
}
SkBitmap slow_blur(const SkBitmap& src, float sigma) {
SkBitmap dst;
dst.allocN32Pixels(src.width(), src.height(), true);
int wh;
SkAutoTDeleteArray<float> kernel(create_2d_kernel(sigma, &wh));
for (int y = 0; y < src.height(); ++y) {
for (int x = 0; x < src.width(); ++x) {
*dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh);
}
}
return dst;
}
