[vlc-commits] direct3d11: define the 0.0625 magic value for the white point

[Steve Lhomme]

vlc | branch: master | Steve Lhomme <robUx4 at videolabs.io> | Mon Feb  6 13:44:14 2017 +0100| [67c96dbb5f0047e9a24c2e6e887c92c785ead846] | committer: Jean-Baptiste Kempf

direct3d11: define the 0.0625 magic value for the white point

That's the "studio" range shifted for full range RGB.

Signed-off-by: Jean-Baptiste Kempf <jb at videolan.org>

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=67c96dbb5f0047e9a24c2e6e887c92c785ead846
---

 modules/video_output/win32/direct3d11.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/modules/video_output/win32/direct3d11.c b/modules/video_output/win32/direct3d11.c
index b3c33ef..6f52c72 100644
--- a/modules/video_output/win32/direct3d11.c
+++ b/modules/video_output/win32/direct3d11.c
@@ -1977,7 +1977,8 @@ static int AllocQuad(vout_display_t *vd, const video_format_t *fmt, d3d_quad_t *
         goto error;
     }
 
-    static const FLOAT WHITE_POINT_D65[4] = { -0.0625f, -0.5f, -0.5f, 1.f };
+#define FULL_TO_STUDIO_SHIFT (16.f / 256.f)
+    static const FLOAT WHITE_POINT_D65_TO_FULL[4] = { -FULL_TO_STUDIO_SHIFT, -0.5f, -0.5f, 1.f };
 
     static const FLOAT COLORSPACE_BT601_TO_FULL[4*4] = {
         1.164383561643836f,                 0.f,  1.596026785714286f, 0.f,
@@ -2020,7 +2021,7 @@ static int AllocQuad(vout_display_t *vd, const video_format_t *fmt, d3d_quad_t *
             break;
     }
     memcpy(colorspace.Colorspace, ppColorspace, sizeof(colorspace.Colorspace));
-    memcpy(colorspace.WhitePoint, WHITE_POINT_D65, sizeof(colorspace.WhitePoint));
+    memcpy(colorspace.WhitePoint, WHITE_POINT_D65_TO_FULL, sizeof(colorspace.WhitePoint));
     constantInit.pSysMem = &colorspace;
 
     static_assert((sizeof(PS_COLOR_TRANSFORM)%16)==0,"Constant buffers require 16-byte alignment");