return scaled;
}
-shared_ptr<Image>
-Image::crop (Crop crop, bool aligned) const
-{
- dcp::Size cropped_size = crop.apply (size ());
- shared_ptr<Image> out (new Image (pixel_format(), cropped_size, aligned));
-
- for (int c = 0; c < components(); ++c) {
- int const crop_left_in_bytes = bytes_per_pixel(c) * crop.left;
- /* bytes_per_pixel() could be a fraction; in this case the stride will be rounded
- up, and we need to make sure that we copy over the width (up to the stride)
- rather than short of the width; hence the ceil() here.
- */
- int const cropped_width_in_bytes = ceil (bytes_per_pixel(c) * cropped_size.width);
-
- /* Start of the source line, cropped from the top but not the left */
- uint8_t* in_p = data()[c] + (crop.top / out->line_factor(c)) * stride()[c];
- uint8_t* out_p = out->data()[c];
-
- for (int y = 0; y < out->lines(c); ++y) {
- memcpy (out_p, in_p + crop_left_in_bytes, cropped_width_in_bytes);
- in_p += stride()[c];
- out_p += out->stride()[c];
- }
- }
-
- return out;
-}
-
/** Blacken a YUV image whose bits per pixel is rounded up to 16 */
void
Image::yuv_16_black (uint16_t v, bool alpha)
delete u;
}
-BOOST_AUTO_TEST_CASE (crop_image_test)
-{
- /* This was to check out a bug with valgrind, and is probably not very useful */
- shared_ptr<Image> image (new Image (PIX_FMT_YUV420P, dcp::Size (16, 16), true));
- image->make_black ();
- Crop crop;
- crop.top = 3;
- image->crop (crop, false);
-}
-
-/* Test cropping of a YUV 4:2:0 image by 1 pixel, which used to fail because
- the U/V copying was not rounded up to the next sample.
-*/
-BOOST_AUTO_TEST_CASE (crop_image_test2)
-{
- /* Here's a 1998 x 1080 image which is black */
- shared_ptr<Image> image (new Image (PIX_FMT_YUV420P, dcp::Size (1998, 1080), true));
- image->make_black ();
-
- /* Crop it by 1 pixel */
- Crop crop;
- crop.left = 1;
- image = image->crop (crop, true);
-
- /* Convert it back to RGB to make comparison to black easier */
- image = image->scale (image->size(), dcp::YUV_TO_RGB_REC601, PIX_FMT_RGB24, true);
-
- /* Check that its still black after the crop */
- uint8_t* p = image->data()[0];
- for (int y = 0; y < image->size().height; ++y) {
- uint8_t* q = p;
- for (int x = 0; x < image->size().width; ++x) {
- BOOST_CHECK_EQUAL (*q++, 0);
- BOOST_CHECK_EQUAL (*q++, 0);
- BOOST_CHECK_EQUAL (*q++, 0);
- }
- p += image->stride()[0];
- }
-}
-
-static
-void
-crop_scale_window_single (AVPixelFormat in_format, dcp::Size in_size, Crop crop, dcp::Size inter_size, dcp::Size out_size)
-{
- /* Set up our test image */
- shared_ptr<Image> test (new Image (in_format, in_size, true));
- uint8_t n = 0;
- for (int c = 0; c < test->components(); ++c) {
- uint8_t* p = test->data()[c];
- for (int y = 0; y < test->lines(c); ++y) {
- for (int x = 0; x < test->stride()[c]; ++x) {
- *p++ = n++;
- }
- }
- }
-
- /* Convert using separate methods */
- boost::shared_ptr<Image> sep = test->crop (crop, true);
- sep = sep->scale (inter_size, dcp::YUV_TO_RGB_REC601, PIX_FMT_RGB24, true);
- boost::shared_ptr<Image> sep_container (new Image (PIX_FMT_RGB24, out_size, true));
- sep_container->make_black ();
- sep_container->copy (sep, Position<int> ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2));
-
- /* Convert using the all-in-one method */
- shared_ptr<Image> all = test->crop_scale_window (crop, inter_size, out_size, dcp::YUV_TO_RGB_REC601, PIX_FMT_RGB24, true);
-
- /* Compare */
- BOOST_CHECK_EQUAL (sep_container->size().width, all->size().width);
- BOOST_CHECK_EQUAL (sep_container->size().height, all->size().height);
-
- /* Assuming RGB on these */
- BOOST_CHECK_EQUAL (sep_container->components(), 1);
- BOOST_CHECK_EQUAL (all->components(), 1);
-
- uint8_t* p = sep_container->data()[0];
- uint8_t* q = all->data()[0];
- for (int y = 0; y < all->size().height; ++y) {
- uint8_t* pp = p;
- uint8_t* qq = q;
- for (int x = 0; x < all->size().width * 3; ++x) {
- BOOST_CHECK_EQUAL (*pp++, *qq++);
- }
- p += sep_container->stride()[0];
- q += all->stride()[0];
- }
-}
-
-/** Test Image::crop_scale_window against separate calls to crop/scale/copy */
-BOOST_AUTO_TEST_CASE (crop_scale_window_test)
-{
- crop_scale_window_single (AV_PIX_FMT_YUV422P, dcp::Size (640, 480), Crop (), dcp::Size (640, 480), dcp::Size (640, 480));
- crop_scale_window_single (AV_PIX_FMT_YUV422P, dcp::Size (640, 480), Crop (2, 4, 6, 8), dcp::Size (640, 480), dcp::Size (640, 480));
- crop_scale_window_single (AV_PIX_FMT_YUV422P, dcp::Size (640, 480), Crop (2, 4, 6, 8), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
- crop_scale_window_single (AV_PIX_FMT_YUV422P, dcp::Size (640, 480), Crop (1, 4, 6, 8), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
- crop_scale_window_single (AV_PIX_FMT_YUV420P, dcp::Size (640, 480), Crop (16, 16, 0, 0), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
- crop_scale_window_single (AV_PIX_FMT_YUV420P, dcp::Size (640, 480), Crop (16, 3, 3, 0), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
- crop_scale_window_single (AV_PIX_FMT_RGB24, dcp::Size (1000, 800), Crop (0, 0, 0, 0), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
- crop_scale_window_single (AV_PIX_FMT_RGB24, dcp::Size (1000, 800), Crop (55, 0, 1, 9), dcp::Size (1920, 1080), dcp::Size (1998, 1080));
-}
-
/** Test Image::alpha_blend */
BOOST_AUTO_TEST_CASE (alpha_blend_test)
{