mirror of
https://github.com/RetroDECK/Supermodel.git
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38 lines
751 B
PostScript
38 lines
751 B
PostScript
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ps_3_0
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; parameters
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; c8 = color offset
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; c9 = (X,Y) scroll position, (Z) 0 = rendering background, 1 = rendering foreground
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; input declarations
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dcl_color v0.xyzw
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dcl_texcoord0 v1.xy
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dcl_2d s0
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dcl_2d s1
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dcl_2d s2
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def c0, 1.0, 0.0, 1.0f, 1.0f
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def c1, 0.5, 0.0, 0.0, 0.0
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add r5, v1.xy, c9.xy ; add scroll position
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frc r5, r5 ; wrap
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texld r0, r5, s0
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texld r10, v1, s2 ; load priority value
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mov r11.r, c9.z
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mov r1.xy, r0.ga
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texld r2, r1, s1
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add r2.rgb, r2.rgb, c8.yzw
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min r2, r2, c0.xxxx ; clamp to 1.0
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max r2, r2, c0.yyyy ; clamp to 0.0
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if_eq r11.r, c0.y ; invert priority if rendering foreground
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sub r10.r, c0.x, r10.r
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endif
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mul r2.a, r2.a, r10.r ; multiply alpha with priority
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mov oC0, r2
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