mirror of https://github.com/OpenRCT2/OpenRCT2.git
114 lines
2.5 KiB
GLSL
114 lines
2.5 KiB
GLSL
#version 150
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// clang-format off
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const int MASK_REMAP_COUNT = 3;
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const int FLAG_NO_TEXTURE = (1 << 2);
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const int FLAG_MASK = (1 << 3);
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const int FLAG_CROSS_HATCH = (1 << 4);
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const int FLAG_TTF_TEXT = (1 << 5);
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uniform usampler2DArray uTexture;
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uniform usampler2D uPaletteTex;
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uniform sampler2D uPeelingTex;
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uniform bool uPeeling;
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flat in int fFlags;
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flat in uint fColour;
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in vec3 fTexColour;
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in vec3 fTexMask;
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flat in vec3 fPalettes;
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in vec2 fPosition;
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in vec3 fPeelPos;
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// clang-format on
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out uint oColour;
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void main()
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{
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if (uPeeling)
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{
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float peel = texture(uPeelingTex, fPeelPos.xy).r;
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if (peel == 0.0 || fPeelPos.z >= peel)
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{
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discard;
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}
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}
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uint texel;
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if ((fFlags & FLAG_NO_TEXTURE) == 0)
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{
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texel = texture(uTexture, fTexColour).r;
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if (texel == 0u)
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{
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discard;
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}
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if ((fFlags & FLAG_TTF_TEXT) == 0)
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{
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texel += fColour;
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}
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else
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{
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uint hint_thresh = uint(fFlags & 0xff00) >> 8;
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if (hint_thresh > 0u)
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{
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bool solidColor = texel > 180u;
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texel = (texel > hint_thresh) ? fColour : 0u;
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texel = texel << 8;
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if (solidColor)
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{
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texel += 1u;
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}
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}
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else
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{
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texel = fColour;
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}
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}
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}
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else
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{
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texel = fColour;
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}
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int paletteCount = fFlags & MASK_REMAP_COUNT;
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if (paletteCount >= 3 && texel >= 0x2Eu && texel < 0x3Au)
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{
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texel = texture(uPaletteTex, vec2(texel + 0xC5u, fPalettes.z) / 256.0f).r;
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}
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else if (paletteCount >= 2 && texel >= 0xCAu && texel < 0xD6u)
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{
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texel = texture(uPaletteTex, vec2(texel + 0x29u, fPalettes.y) / 256.f).r;
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}
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else if (paletteCount >= 1)
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{
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texel = texture(uPaletteTex, vec2(texel, fPalettes.x) / 256.f).r;
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}
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if (texel == 0u)
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{
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discard;
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}
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if ((fFlags & FLAG_CROSS_HATCH) != 0)
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{
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int posSum = int(fPosition.x) + int(fPosition.y);
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if ((posSum % 2) == 0)
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{
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discard;
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}
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}
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if ((fFlags & FLAG_MASK) != 0)
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{
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uint mask = texture(uTexture, fTexMask).r;
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if (mask == 0u)
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{
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discard;
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}
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}
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oColour = texel;
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}
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