FROMLIST: v4l: add porter duff blend controls

At peresent, we don't have a control for Compositing and Blend.
All drivers are just doing copies while actually many hardwares
supports more functions.

So Adding V4L2 controls for Compositing and Blend, used for for
composting streams.
(am from https://patchwork.linuxtv.org/patch/42848/)
The values are based on porter duff operations.
Defined in below links.
https://developer.xamarin.com/api/type/Android.Graphics.PorterDuff+Mode/

Change-Id: I16245fc8389a433ebdcb228081a80daa48e8c539
Suggested-by: Nicolas Dufresne <nicolas@ndufresne.ca>
Signed-off-by: Jacob Chen <jacob-chen@iotwrt.com>
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index f82434e178e17b4fc498178fb05da774849c86ee..00a5fb0bb3cf2d68ccb5f308e60a6135badb60ab 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -469,7 +469,21 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                "Region Grid",
                NULL,
        };
-
+       static const char * const porter_duff_modes[] = {
+               "Source",
+               "Source Top",
+               "Source In",
+               "Source Out",
+               "Source Over",
+               "Destination",
+               "Destination Top",
+               "Destination In",
+               "Destination Out",
+               "Destination Over",
+               "Add",
+               "Clear",
+               NULL
+       };
 
        switch (id) {
        case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
@@ -555,6 +569,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                return vpx_golden_frame_sel;
        case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
                return jpeg_chroma_subsampling;
+       case V4L2_CID_PORTER_DUFF_MODE:
+               return porter_duff_modes;
        case V4L2_CID_DV_TX_MODE:
                return dv_tx_mode;
        case V4L2_CID_DV_TX_RGB_RANGE:
@@ -880,6 +896,7 @@ const char *v4l2_ctrl_get_name(u32 id)
        case V4L2_CID_LINK_FREQ:                return "Link Frequency";
        case V4L2_CID_PIXEL_RATE:               return "Pixel Rate";
        case V4L2_CID_TEST_PATTERN:             return "Test Pattern";
+       case V4L2_CID_PORTER_DUFF_MODE:         return "PorterDuff Blend Modes";
 
        /* DV controls */
        /* Keep the order of the 'case's the same as in v4l2-controls.h! */
@@ -1049,6 +1066,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
        case V4L2_CID_DV_TX_RGB_RANGE:
        case V4L2_CID_DV_RX_RGB_RANGE:
        case V4L2_CID_TEST_PATTERN:
+       case V4L2_CID_PORTER_DUFF_MODE:
        case V4L2_CID_TUNE_DEEMPHASIS:
        case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
        case V4L2_CID_DETECT_MD_MODE:

diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 895f8492312dcc92edeab9e04e03705761ea267a..1ab4affd4bd35d11115d36d114f9a32b69bc0a15 100644 (file)
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -901,6 +901,21 @@ enum v4l2_jpeg_chroma_subsampling {
 #define V4L2_CID_PIXEL_RATE                    (V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
 #define V4L2_CID_TEST_PATTERN                  (V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
 
+#define V4L2_CID_PORTER_DUFF_MODE              (V4L2_CID_IMAGE_PROC_CLASS_BASE + 5)
+enum v4l2_porter_duff_mode {
+       V4L2_PORTER_DUFF_SRC                    = 0,
+       V4L2_PORTER_DUFF_SRCATOP                = 1,
+       V4L2_PORTER_DUFF_SRCIN                  = 2,
+       V4L2_PORTER_DUFF_SRCOUT                 = 3,
+       V4L2_PORTER_DUFF_SRCOVER                = 4,
+       V4L2_PORTER_DUFF_DST                    = 5,
+       V4L2_PORTER_DUFF_DSTATOP                = 6,
+       V4L2_PORTER_DUFF_DSTIN                  = 7,
+       V4L2_PORTER_DUFF_DSTOUT                 = 8,
+       V4L2_PORTER_DUFF_DSTOVER                = 9,
+       V4L2_PORTER_DUFF_ADD                    = 10,
+       V4L2_PORTER_DUFF_CLEAR                  = 11,
+};
 
 /*  DV-class control IDs defined by V4L2 */
 #define V4L2_CID_DV_CLASS_BASE                 (V4L2_CTRL_CLASS_DV | 0x900)