mirror of
https://github.com/OpenRCT2/OpenRCT2.git
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54 lines
1.5 KiB
GLSL
54 lines
1.5 KiB
GLSL
#version 150
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// Allows for about 8 million draws per frame
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const float DEPTH_INCREMENT = 1.0 / float(1u << 22u);
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uniform ivec2 uScreenSize;
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in ivec4 vClip;
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in int vTexColourAtlas;
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in vec4 vTexColourBounds;
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in int vTexMaskAtlas;
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in vec4 vTexMaskBounds;
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in ivec3 vPalettes;
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in int vFlags;
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in uint vColour;
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in ivec4 vBounds;
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in int vDepth;
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in mat4x2 vVertMat;
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in vec2 vVertVec;
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out vec2 fPosition;
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out vec3 fPeelPos;
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flat out int fFlags;
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flat out uint fColour;
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out vec3 fTexColour;
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out vec3 fTexMask;
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flat out vec3 fPalettes;
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void main()
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{
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// Clamp position by vClip, correcting interpolated values for the clipping
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vec2 m = clamp(((vVertMat * vec4(vClip)) - (vVertMat * vec4(vBounds)))/vec2(vBounds.zw - vBounds.xy) + vVertVec, 0.0, 1.0);
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vec2 pos = mix(vec2(vBounds.xy), vec2(vBounds.zw), m);
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fTexColour = vec3(mix(vTexColourBounds.xy, vTexColourBounds.zw, m), vTexColourAtlas);
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fTexMask = vec3(mix(vTexMaskBounds.xy, vTexMaskBounds.zw, m), vTexMaskAtlas);
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fPosition = pos;
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// Transform screen coordinates to texture coordinates
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float depth = 1.0 - (float(vDepth) + 1.0) * DEPTH_INCREMENT;
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pos = pos / vec2(uScreenSize);
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pos.y = pos.y * -1.0 + 1.0;
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fPeelPos = vec3(pos, depth * 0.5 + 0.5);
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fFlags = vFlags;
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fColour = vColour;
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fPalettes = vec3(vPalettes);
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// Transform texture coordinates to viewport coordinates
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pos = pos * 2.0 - 1.0;
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gl_Position = vec4(pos, depth, 1.0);
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}
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