Re: [PATCH] drm: Introduce RGB 64-bit 16:16:16:16 float format
On Thu, Nov 23, 2017 at 04:56:56PM +0800, Tina Zhang wrote: > The RGB 64-bit 16:16:16:16 float pixel format is needed by some Apps in > windows. The float format in each component is 1:5:10 MSb-sign:exponent: > fraction. > > This patch is to introduce the format to drm, so that the windows guest's > framebuffer in this kind of format can be recognized and used by linux > host. > > v14: > - add some details about the float pixel format. (Daniel) > - add F suffix to the defined name. (Daniel) > > v12: > - send to dri-devel at lists.freedesktop.org. (Ville) > > v9: > - separated from framebuffer decoder patch. (Zhenyu) (Xiaoguang) > > Signed-off-by: Tina Zhang> Cc: Ville Syrjälä > Cc: Dave Airlie > Cc: Daniel Vetter > --- > include/uapi/drm/drm_fourcc.h | 4 > 1 file changed, 4 insertions(+) > > diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h > index 3ad838d..391d2e6 100644 > --- a/include/uapi/drm/drm_fourcc.h > +++ b/include/uapi/drm/drm_fourcc.h > @@ -113,6 +113,10 @@ extern "C" { > > #define DRM_FORMAT_AYUV fourcc_code('A', 'Y', 'U', 'V') /* > [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */ > > +/* 64 bpp RGB 16:16:16:16 Floating Point */ As before this is still extremely vague. Stating that each component is a IEEE-754 half-precision float (binary16) should cover it. Well, assuming that it really is one. > +#define DRM_FORMAT_XRGB161616F fourcc_code('X', 'R', '3', 'F') /* [63:0] > x:R:G:B 16:16:16:16 little endian */ > +#define DRM_FORMAT_XBGR161616F fourcc_code('X', 'B', '3', 'F') /* [63:0] > x:B:G:R 16:16:16:16 little endian */ Missing one 16 from that name to be consistent with the non-float stuff. Also maybe it should be (... '4', 'F')? '3' would seem to imply a 48 bit pixel. And of course it's still missing the actual implemntation for any driver. > + > /* > * 2 plane RGB + A > * index 0 = RGB plane, same format as the corresponding non _A8 format has > -- > 2.7.4 -- Ville Syrjälä Intel OTC ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
[PATCH] drm: Introduce RGB 64-bit 16:16:16:16 float format
The RGB 64-bit 16:16:16:16 float pixel format is needed by some Apps in windows. The float format in each component is 1:5:10 MSb-sign:exponent: fraction. This patch is to introduce the format to drm, so that the windows guest's framebuffer in this kind of format can be recognized and used by linux host. v14: - add some details about the float pixel format. (Daniel) - add F suffix to the defined name. (Daniel) v12: - send to dri-devel at lists.freedesktop.org. (Ville) v9: - separated from framebuffer decoder patch. (Zhenyu) (Xiaoguang) Signed-off-by: Tina ZhangCc: Ville Syrjälä Cc: Dave Airlie Cc: Daniel Vetter --- include/uapi/drm/drm_fourcc.h | 4 1 file changed, 4 insertions(+) diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 3ad838d..391d2e6 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -113,6 +113,10 @@ extern "C" { #define DRM_FORMAT_AYUVfourcc_code('A', 'Y', 'U', 'V') /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */ +/* 64 bpp RGB 16:16:16:16 Floating Point */ +#define DRM_FORMAT_XRGB161616F fourcc_code('X', 'R', '3', 'F') /* [63:0] x:R:G:B 16:16:16:16 little endian */ +#define DRM_FORMAT_XBGR161616F fourcc_code('X', 'B', '3', 'F') /* [63:0] x:B:G:R 16:16:16:16 little endian */ + /* * 2 plane RGB + A * index 0 = RGB plane, same format as the corresponding non _A8 format has -- 2.7.4 ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
[PATCH] drm: Introduce RGB 64-bit 16:16:16:16 float format
This patch is from "[PATCH v19 0/6] drm/i915/gvt: Dma-buf support for GVT-g": https://lists.freedesktop.org/archives/intel-gvt-dev/2017-November/002508.html The RGB 64-bit 16:16:16:16 float pixel format is needed by some Apps in windows. The float format in each component is 1:5:10 MSb-sign:exponent: fraction. This patch is to introduce the format to drm, so that the windows guest's framebuffer in this kind of format can be recognized and used by linux host. Tina Zhang (1): drm: Introduce RGB 64-bit 16:16:16:16 float format include/uapi/drm/drm_fourcc.h | 4 1 file changed, 4 insertions(+) -- 2.7.4 ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel