[PATCHv2 3/5] drm: Introduce DRM_MODE_COLOR()

Vandita Kulkarni
2016-04-26T09:33:31Z

From: Damien Lespiau <damien.lespiau@intel.com>

In the hope of expressing colors in the KMS API in a consitant want,
let's introduce a ARGB 16161616 color and a few convinience macros
around it.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
include/uapi/drm/drm_mode.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 7a7856e..203c7ab0 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -295,6 +295,40 @@ struct drm_mode_get_connector {
*/
#define DRM_MODE_PROP_ATOMIC 0x80000000

+/* Color for the KMS API, ARGB (msb -> lsb) 16bits per component. */
+#define DRM_MODE_COLOR(a, r, b, g) \
+ (((__u64)(a) << 48) | ((__u64)(r) << 32) | \
+ ((__u64)(g) << 16) | (__u64)(b))
+
+/* Extract full precision, 8 bits, 10 bits and 12 bits components. */
+#define DRM_MODE_COLOR_ALPHA(color) (((color) >> 48) & 0xffff)
+#define DRM_MODE_COLOR_RED(color) (((color) >> 32) & 0xffff)
+#define DRM_MODE_COLOR_BLUE(color) (((color) >> 16) & 0xffff)
+#define DRM_MODE_COLOR_GREEN(color) ((color) & 0xffff)
+#define DRM_MODE_COLOR_ALPHA_8(color) (((color) >> (48 + 8)) & 0xff)
+#define DRM_MODE_COLOR_RED_8(color) (((color) >> (32 + 8)) & 0xff)
+#define DRM_MODE_COLOR_BLUE_8(color) (((color) >> (16 + 8)) & 0xff)
+#define DRM_MODE_COLOR_GREEN_8(color) (((color) >> 8) & 0xff)
+#define DRM_MODE_COLOR_ALPHA_10(color) (((color) >> (48 + 6)) & 0x3ff)
+#define DRM_MODE_COLOR_RED_10(color) (((color) >> (32 + 6)) & 0x3ff)
+#define DRM_MODE_COLOR_BLUE_10(color) (((color) >> (16 + 6)) & 0x3ff)
+#define DRM_MODE_COLOR_GREEN_10(color) (((color) >> 6) & 0x3ff)
+#define DRM_MODE_COLOR_ALPHA_12(color) (((color) >> (48 + 4)) & 0xfff)
+#define DRM_MODE_COLOR_RED_12(color) (((color) >> (32 + 4)) & 0xfff)
+#define DRM_MODE_COLOR_BLUE_12(color) (((color) >> (16 + 4)) & 0xfff)
+#define DRM_MODE_COLOR_GREEN_12(color) (((color) >> 4) & 0xfff)
+
+/* Handy macros to convert a DRM_MODE_COLOR() into common precisions */
+#define DRM_MODE_COLOR_TO_ARGB_8888(color) \
+ ((DRM_MODE_COLOR_ALPHA_8(color) << 24) | \
+ (DRM_MODE_COLOR_RED_8(color) << 16) | \
+ (DRM_MODE_COLOR_GREEN_8(color) << 8) | \
+ DRM_MODE_COLOR_BLUE_8(color))
+#define DRM_MODE_COLOR_TO_RGB_101010(color) \
+ ((DRM_MODE_COLOR_RED_10(color) << 20) | \
+ (DRM_MODE_COLOR_GREEN_10(color) << 10) | \
+ DRM_MODE_COLOR_BLUE_10(color))
+
struct drm_mode_property_enum {
__u64 value;
char name[DRM_PROP_NAME_LEN];
--
1.9.1

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