+
+/* 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(), Scaler::from_id ("bicubic"), 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
+boost::shared_ptr<Image>
+read_file (string file)
+{
+ Magick::Image magick_image (file.c_str ());
+ dcp::Size size (magick_image.columns(), magick_image.rows());
+
+ boost::shared_ptr<Image> image (new Image (PIX_FMT_RGB24, size, true));
+
+ using namespace MagickCore;
+
+ uint8_t* p = image->data()[0];
+ for (int y = 0; y < size.height; ++y) {
+ uint8_t* q = p;
+ for (int x = 0; x < size.width; ++x) {
+ Magick::Color c = magick_image.pixelColor (x, y);
+ *q++ = c.redQuantum() * 255 / QuantumRange;
+ *q++ = c.greenQuantum() * 255 / QuantumRange;
+ *q++ = c.blueQuantum() * 255 / QuantumRange;
+ }
+ p += image->stride()[0];
+ }
+
+ return image;
+}
+
+static
+void
+write_file (shared_ptr<Image> image, string file)
+{
+ using namespace MagickCore;
+
+ Magick::Image magick_image (Magick::Geometry (image->size().width, image->size().height), Magick::Color (0, 0, 0));
+ 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) {
+ Magick::Color c (q[0] * QuantumRange / 256, q[1] * QuantumRange / 256, q[2] * QuantumRange / 256);
+ magick_image.pixelColor (x, y, c);
+ q += 3;
+ }
+ p += image->stride()[0];
+ }
+
+ magick_image.write (file.c_str ());
+}
+
+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, Scaler::from_id ("bicubic"), 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, Scaler::from_id ("bicubic"), 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)
+{
+ int const stride = 48 * 4;
+
+ shared_ptr<Image> A (new Image (AV_PIX_FMT_RGBA, dcp::Size (48, 48), false));
+ A->make_black ();
+ uint8_t* a = A->data()[0];
+
+ for (int y = 0; y < 48; ++y) {
+ uint8_t* p = a + y * stride;
+ for (int x = 0; x < 16; ++x) {
+ p[x * 4] = 255;
+ p[(x + 16) * 4 + 1] = 255;
+ p[(x + 32) * 4 + 2] = 255;
+ }
+ }
+
+ shared_ptr<Image> B (new Image (AV_PIX_FMT_RGBA, dcp::Size (48, 48), true));
+ B->make_transparent ();
+ uint8_t* b = B->data()[0];
+
+ for (int y = 32; y < 48; ++y) {
+ uint8_t* p = b + y * stride;
+ for (int x = 0; x < 48; ++x) {
+ p[x * 4] = 255;
+ p[x * 4 + 1] = 255;
+ p[x * 4 + 2] = 255;
+ p[x * 4 + 3] = 255;
+ }
+ }
+
+ A->alpha_blend (B, Position<int> (0, 0));
+
+ for (int y = 0; y < 32; ++y) {
+ uint8_t* p = a + y * stride;
+ for (int x = 0; x < 16; ++x) {
+ BOOST_CHECK_EQUAL (p[x * 4], 255);
+ BOOST_CHECK_EQUAL (p[(x + 16) * 4 + 1], 255);
+ BOOST_CHECK_EQUAL (p[(x + 32) * 4 + 2], 255);
+ }
+ }
+
+ for (int y = 32; y < 48; ++y) {
+ uint8_t* p = a + y * stride;
+ for (int x = 0; x < 48; ++x) {
+ BOOST_CHECK_EQUAL (p[x * 4], 255);
+ BOOST_CHECK_EQUAL (p[x * 4 + 1], 255);
+ BOOST_CHECK_EQUAL (p[x * 4 + 2], 255);
+ BOOST_CHECK_EQUAL (p[x * 4 + 3], 255);
+ }
+ }
+}
+
+/** Test merge (list<PositionImage>) with a single image */
+BOOST_AUTO_TEST_CASE (merge_test1)
+{
+ int const stride = 48 * 4;
+
+ shared_ptr<Image> A (new Image (AV_PIX_FMT_RGBA, dcp::Size (48, 48), false));
+ A->make_transparent ();
+ uint8_t* a = A->data()[0];
+
+ for (int y = 0; y < 48; ++y) {
+ uint8_t* p = a + y * stride;
+ for (int x = 0; x < 16; ++x) {
+ /* red */
+ p[x * 4] = 255;
+ /* opaque */
+ p[x * 4 + 3] = 255;
+ }
+ }
+
+ list<PositionImage> all;
+ all.push_back (PositionImage (A, Position<int> (0, 0)));
+ PositionImage merged = merge (all);
+
+ BOOST_CHECK (merged.position == Position<int> (0, 0));
+ BOOST_CHECK_EQUAL (memcmp (merged.image->data()[0], A->data()[0], stride * 48), 0);
+}
+
+/** Test merge (list<PositionImage>) with two images */
+BOOST_AUTO_TEST_CASE (merge_test2)
+{
+ shared_ptr<Image> A (new Image (AV_PIX_FMT_RGBA, dcp::Size (48, 1), false));
+ A->make_transparent ();
+ uint8_t* a = A->data()[0];
+ for (int x = 0; x < 16; ++x) {
+ /* red */
+ a[x * 4] = 255;
+ /* opaque */
+ a[x * 4 + 3] = 255;
+ }
+
+ shared_ptr<Image> B (new Image (AV_PIX_FMT_RGBA, dcp::Size (48, 1), false));
+ B->make_transparent ();
+ uint8_t* b = B->data()[0];
+ for (int x = 0; x < 16; ++x) {
+ /* blue */
+ b[(x + 32) * 4 + 2] = 255;
+ /* opaque */
+ b[(x + 32) * 4 + 3] = 255;
+ }
+
+ list<PositionImage> all;
+ all.push_back (PositionImage (A, Position<int> (0, 0)));
+ all.push_back (PositionImage (B, Position<int> (0, 0)));
+ PositionImage merged = merge (all);
+
+ BOOST_CHECK (merged.position == Position<int> (0, 0));
+
+ uint8_t* m = merged.image->data()[0];
+
+ for (int x = 0; x < 16; ++x) {
+ BOOST_CHECK_EQUAL (m[x * 4], 255);
+ BOOST_CHECK_EQUAL (m[x * 4 + 3], 255);
+ BOOST_CHECK_EQUAL (m[(x + 16) * 4 + 3], 0);
+ BOOST_CHECK_EQUAL (m[(x + 32) * 4 + 2], 255);
+ BOOST_CHECK_EQUAL (m[(x + 32) * 4 + 3], 255);
+ }
+}