From 042b25542c6de5a9e9a6d226c9b303aa023eca70 Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Wed, 8 Oct 2014 11:26:24 +0200
Subject: [PATCH] videotestsrc: add gradient pattern

Makes a gradient between background and foreground color.
---
 gst/videotestsrc/gstvideotestsrc.c |  4 ++++
 gst/videotestsrc/gstvideotestsrc.h |  3 ++-
 gst/videotestsrc/videotestsrc.c    | 26 ++++++++++++++++++++++++++
 gst/videotestsrc/videotestsrc.h    |  1 +
 4 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/gst/videotestsrc/gstvideotestsrc.c b/gst/videotestsrc/gstvideotestsrc.c
index 6951b3d..94013f9 100644
--- a/gst/videotestsrc/gstvideotestsrc.c
+++ b/gst/videotestsrc/gstvideotestsrc.c
@@ -151,6 +151,7 @@ gst_video_test_src_pattern_get_type (void)
     {GST_VIDEO_TEST_SRC_BAR, "Bar", "bar"},
     {GST_VIDEO_TEST_SRC_PINWHEEL, "Pinwheel", "pinwheel"},
     {GST_VIDEO_TEST_SRC_SPOKES, "Spokes", "spokes"},
+    {GST_VIDEO_TEST_SRC_GRADIENT, "Gradient", "gradient"},
     {0, NULL, NULL}
   };
 
@@ -423,6 +424,9 @@ gst_video_test_src_set_pattern (GstVideoTestSrc * videotestsrc,
     case GST_VIDEO_TEST_SRC_SPOKES:
       videotestsrc->make_image = gst_video_test_src_spokes;
       break;
+    case GST_VIDEO_TEST_SRC_GRADIENT:
+      videotestsrc->make_image = gst_video_test_src_gradient;
+      break;
     default:
       g_assert_not_reached ();
   }
diff --git a/gst/videotestsrc/gstvideotestsrc.h b/gst/videotestsrc/gstvideotestsrc.h
index 468aad7..1c77a8e 100644
--- a/gst/videotestsrc/gstvideotestsrc.h
+++ b/gst/videotestsrc/gstvideotestsrc.h
@@ -107,7 +107,8 @@ typedef enum {
   GST_VIDEO_TEST_SRC_SMPTE100,
   GST_VIDEO_TEST_SRC_BAR,
   GST_VIDEO_TEST_SRC_PINWHEEL,
-  GST_VIDEO_TEST_SRC_SPOKES
+  GST_VIDEO_TEST_SRC_SPOKES,
+  GST_VIDEO_TEST_SRC_GRADIENT
 } GstVideoTestSrcPattern;
 
 typedef struct _GstVideoTestSrc GstVideoTestSrc;
diff --git a/gst/videotestsrc/videotestsrc.c b/gst/videotestsrc/videotestsrc.c
index b4adf90..debbca0 100644
--- a/gst/videotestsrc/videotestsrc.c
+++ b/gst/videotestsrc/videotestsrc.c
@@ -1336,3 +1336,29 @@ gst_video_test_src_spokes (GstVideoTestSrc * v, GstVideoFrame * frame)
     videotestsrc_convert_tmpline (p, frame, j);
   }
 }
+
+void
+gst_video_test_src_gradient (GstVideoTestSrc * v, GstVideoFrame * frame)
+{
+  int i;
+  int j;
+  paintinfo pi = PAINT_INFO_INIT;
+  paintinfo *p = &pi;
+  struct vts_color_struct color;
+  int w = frame->info.width, h = frame->info.height;
+
+  videotestsrc_setup_paintinfo (v, p, w, h);
+
+  color = p->colors[COLOR_BLACK];
+  p->color = &color;
+
+  for (j = 0; j < h; j++) {
+    int y = j * 255.0 / h;
+    for (i = 0; i < w; i++) {
+      p->tmpline_u8[i] = y;
+    }
+    videotestsrc_blend_line (v, p->tmpline, p->tmpline_u8,
+        &p->foreground_color, &p->background_color, w);
+    videotestsrc_convert_tmpline (p, frame, j);
+  }
+}
diff --git a/gst/videotestsrc/videotestsrc.h b/gst/videotestsrc/videotestsrc.h
index c1e5e1f..9a23b9a 100644
--- a/gst/videotestsrc/videotestsrc.h
+++ b/gst/videotestsrc/videotestsrc.h
@@ -82,5 +82,6 @@ void    gst_video_test_src_smpte100     (GstVideoTestSrc * v, GstVideoFrame *fra
 void    gst_video_test_src_bar          (GstVideoTestSrc * v, GstVideoFrame *frame);
 void    gst_video_test_src_pinwheel     (GstVideoTestSrc * v, GstVideoFrame * frame);
 void    gst_video_test_src_spokes       (GstVideoTestSrc * v, GstVideoFrame * frame);
+void    gst_video_test_src_gradient     (GstVideoTestSrc * v, GstVideoFrame * frame);
 
 #endif
-- 
2.7.4