506434c5e6
This adds the ability to use a secondary black-and-white video as a mask between source A and B of the transition. The greyscale value of each pixel is used as the "slider" value in a linear interpolation between the corresponding pixels in source A and source B. The track matte can either be in the same file as the stinger itself (next to the stinger or under the stinger, doubling the width or height of the stinger depending of the selected layout) or a in a separate dedicated file. The same file/separate file behavior is controlled by the "Matte Layout" option in the stinger settings.
54 lines
1.1 KiB
Plaintext
54 lines
1.1 KiB
Plaintext
uniform float4x4 ViewProj;
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uniform texture2d a_tex;
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uniform texture2d b_tex;
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uniform texture2d matte_tex;
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uniform bool invert_matte;
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sampler_state textureSampler {
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Filter = Linear;
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AddressU = Clamp;
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AddressV = Clamp;
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};
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struct VertData {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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VertData VSDefault(VertData v_in)
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{
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VertData vert_out;
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vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
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vert_out.uv = v_in.uv;
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return vert_out;
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}
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float4 PSStingerMatte(VertData v_in) : TARGET
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{
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float2 uv = v_in.uv;
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float4 a_color = a_tex.Sample(textureSampler, uv);
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float4 b_color = b_tex.Sample(textureSampler, uv);
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float4 matte_color = matte_tex.Sample(textureSampler, uv);
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// RGB -> Luma conversion using Rec. 709 factors
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float matte_luma = (
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(matte_color.x * 0.2126) +
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(matte_color.y * 0.7152) +
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(matte_color.z * 0.0722)
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);
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// if matte invert is enabled, invert the matte color
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matte_luma = (invert_matte ? (1.0 - matte_luma) : matte_luma);
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return lerp(a_color, b_color, matte_luma);
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}
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technique StingerMatte
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{
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pass
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{
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vertex_shader = VSDefault(v_in);
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pixel_shader = PSStingerMatte(v_in);
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}
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}
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