mirror of
https://github.com/OpenDriver2/REDRIVER2.git
synced 2024-11-24 19:32:50 +01:00
57 lines
1.7 KiB
HLSL
57 lines
1.7 KiB
HLSL
struct VS_INPUT {
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float4 a_position : POSITION;
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float4 a_texcoord : TEXCOORD0;
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float4 a_color : COLOR0;
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};
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struct VS_OUTPUT {
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float4 v_position : POSITION;
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float4 v_texcoord : TEXCOORD0;
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float4 v_color : TEXCOORD1;
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float4 v_page_clut : TEXCOORD2;
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};
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#ifdef VERTEX
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float4x4 Projection : register(c0);
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VS_OUTPUT main(VS_INPUT In) {
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VS_OUTPUT Out;
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Out.v_texcoord = In.a_texcoord;
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Out.v_color = In.a_color;
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Out.v_color.xyz *= In.a_texcoord.z;
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Out.v_page_clut.x = frac (In.a_position.z / 16.0) * 1024.0;
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Out.v_page_clut.y = floor(In.a_position.z / 16.0) * 256.0;
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Out.v_page_clut.z = frac (In.a_position.w / 64.0);
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Out.v_page_clut.w = floor(In.a_position.w / 64.0) / 512.0;
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Out.v_position = mul(Projection, float4(In.a_position.xy, 0.0, 1.0));
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return Out;
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}
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#else
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sampler2D s_texture : register(s0);
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float4 main(VS_OUTPUT In, float2 coord : VPOS) : COLOR0 {
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float2 uv = (In.v_texcoord.xy * float2(0.5, 1.0) + In.v_page_clut.xy) * float2(1.0 / 1024.0, 1.0 / 512.0);
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float2 comp = tex2D(s_texture, uv).ra;
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float2 clut_pos = In.v_page_clut.zw;
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clut_pos.x += comp[int(fmod(In.v_texcoord.x, 2.0))] * 255.0 / 1024.0;
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float2 clut_color = tex2D(s_texture, clut_pos).ra * 255.0;
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float color_16 = clut_color.y * 256.0 + clut_color.x;
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clip(color_16 - 0.001);
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float4 color = frac(floor(color_16 / float4(1.0, 32.0, 1024.0, 32768.0)) / 32.0);
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color = color * In.v_color;
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float4x4 dither = float4x4(
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-4.0, +0.0, -3.0, +1.0,
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+2.0, -2.0, +3.0, -1.0,
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-3.0, +1.0, -4.0, +0.0,
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+3.0, -1.0, +2.0, -2.0) / 255.0;
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int2 dc = int2(frac(coord.xy / 4.0) * 4.0);
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color.xyz += dither[dc.x][dc.y] * In.v_texcoord.w;
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return color;
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}
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#endif
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