mirror of https://github.com/OpenRCT2/OpenRCT2.git
90 lines
2.4 KiB
GLSL
90 lines
2.4 KiB
GLSL
#version 150
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const int FLAG_COLOUR = (1 << 0);
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const int FLAG_REMAP = (1 << 1);
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const int FLAG_TRANSPARENT = (1 << 2);
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const int FLAG_TRANSPARENT_SPECIAL = (1 << 3);
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uniform vec4 uPalette[256];
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uniform usampler2DArray uTexture;
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flat in ivec4 fClip;
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flat in int fFlags;
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in vec4 fColour;
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flat in int fTexColourAtlas;
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in vec2 fTexColourCoords;
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flat in int fTexMaskAtlas;
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in vec2 fTexMaskCoords;
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flat in int fTexPaletteAtlas;
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flat in vec4 fTexPaletteBounds;
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flat in int fMask;
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in vec2 fPosition;
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in vec2 fTextureCoordinate;
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out vec4 oColour;
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void main()
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{
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if (fPosition.x < fClip.x || fPosition.x > fClip.z ||
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fPosition.y < fClip.y || fPosition.y > fClip.w)
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{
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discard;
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}
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vec4 texel;
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// If remap palette used
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if ((fFlags & FLAG_REMAP) != 0)
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{
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// z is the size of each x pixel in the atlas
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float x = fTexPaletteBounds.x + texture(uTexture, vec3(fTexColourCoords, float(fTexColourAtlas))).r * fTexPaletteBounds.z;
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texel = uPalette[texture(uTexture, vec3(x, fTexPaletteBounds.y, float(fTexPaletteAtlas))).r];
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} // If transparent or special transparent
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else if ((fFlags & (FLAG_TRANSPARENT | FLAG_TRANSPARENT_SPECIAL)) != 0)
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{
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float line = texture(uTexture,vec3(fTexColourCoords, float(fTexColourAtlas))).r;
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if (line == 0.0)
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{
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discard;
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}
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float alpha = 0.5;
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if ((fFlags & FLAG_TRANSPARENT_SPECIAL) != 0)
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{
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alpha = 0.5 + (line - 1.0) / 10.0;
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}
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// z is the size of each x pixel in the atlas
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float x = fTexPaletteBounds.x + fTexPaletteBounds.z * 50.0;
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oColour = vec4(uPalette[texture(uTexture, vec3(x, fTexPaletteBounds.y, float(fTexPaletteAtlas))).r].rgb, alpha);
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return;
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}
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else
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{
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texel = uPalette[texture(uTexture, vec3(fTexColourCoords, float(fTexColourAtlas))).r];
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}
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if (fMask != 0)
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{
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float mask = texture(uTexture, vec3(fTexMaskCoords, float(fTexMaskAtlas))).r;
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if ( mask == 0.0 )
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{
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discard;
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}
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oColour = texel;
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}
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else
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{
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if ((fFlags & FLAG_COLOUR) != 0)
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{
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oColour = vec4(fColour.rgb, fColour.a * texel.a);
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}
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else
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{
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oColour = texel;
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}
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}
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}
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