vo_direct3d: remove 2ch hack for 10 bit playback

This was an awkward hack that attempted to avoid the use of 16 bit
textures, while still allowing rendering 10-16 bit YUV formats. The
idea was that even if the hardware doesn't support 16 bit textures,
an A8L8 textures could be used to convert 10 bit (etc.) to 8 bit in
the shader, instead of doing this on the CPU.

This was an experiment, disabled by default, and was (probably) rarely
used. I've never heard of this being used successfully. Remove it.

1 files changed, 0 insertions, 15 deletions

diff --git a/video/out/d3d_shader_yuv.hlsl b/video/out/d3d_shader_yuv.hlsl
index b17e257210..0e78554254 100644
--- a/video/out/d3d_shader_yuv.hlsl
+++ b/video/out/d3d_shader_yuv.hlsl
@@ -1,6 +1,5 @@
 // Compile with:
 // fxc.exe /Tps_2_0 /Fhd3d_shader_yuv.h d3d_shader_yuv.hlsl /Vnd3d_shader_yuv
-// fxc.exe /Tps_2_0 /Fhd3d_shader_yuv_2ch.h d3d_shader_yuv.hlsl /Vnd3d_shader_yuv_2ch /DUSE_2CH=1
 
 // Be careful with this shader. You can't use constant slots, since we don't
 // load the shader with D3DX. All uniform variables are mapped to hardcoded
@@ -11,26 +10,12 @@ sampler2D tex1 : register(s1);
 sampler2D tex2 : register(s2);
 
 uniform float4x4 colormatrix : register(c0);
-uniform float2 depth : register(c5);
-
-#ifdef USE_2CH
-
-float1 sample(sampler2D tex, float2 t)
-{
-    // Sample from A8L8 format as if we sampled a single value from L16.
-    // We compute the 2 channel values back into one.
-    return dot(tex2D(tex, t).xw, depth);
-}
-
-#else
 
 float1 sample(sampler2D tex, float2 t)
 {
     return tex2D(tex, t).x;
 }
 
-#endif
-
 float4 main(float2 t0 : TEXCOORD0,
             float2 t1 : TEXCOORD1,
             float2 t2 : TEXCOORD2)