1 files changed, 54 insertions, 0 deletions
diff --git a/gfx/gl/shaders/material.fs b/gfx/gl/shaders/material.fs
new file mode 100644
index 0000000..cafb35d
--- /dev/null
+++ b/gfx/gl/shaders/material.fs
@@ -0,0 +1,54 @@
+#version 330 core
+#extension GL_ARB_shading_language_420pack : enable
+
+include(`materialInterface.glsl')
+include(`materialOut.glsl')
+
+layout(binding = 0) uniform sampler2D texture0;
+layout(binding = 1) uniform usampler2DRect material;
+
+float map(uint mapmode, float value)
+{
+	switch (mapmode) {
+		case 0u: // Repeat
+			return fract(value);
+		case 1u: // Clamp to edge
+			return clamp(0.0, 1.0, value);
+		case 2u: // Mirror
+			discard;
+		case 3u: // Decal
+			if (value != clamp(0.0, 1.0, value)) {
+				discard;
+			}
+	}
+	return 0;
+}
+
+vec2 map(uint mapmodeU, uint mapmodeV, vec2 value)
+{
+	return vec2(map(mapmodeU, value.x), map(mapmodeV, value.y));
+}
+
+vec4 getTextureColour(uint midx, vec2 uv)
+{
+	if (midx > 0u) {
+		const vec2 tSize = textureSize(texture0, 0);
+		const vec4 sPosSize = texture(material, uvec2(0, midx - 1u));
+		const uvec4 sMode = texture(material, uvec2(1, midx - 1u));
+		const uint mapmodeU = sMode.x & 0xFu;
+		const uint mapmodeV = (sMode.x & 0xF0u) >> 1;
+		uv = (sPosSize.xy + sPosSize.zw * map(mapmodeU, mapmodeV, uv)) / tSize;
+	}
+	return texture(texture0, uv);
+}
+
+void
+main()
+{
+	vec4 textureColour = getTextureColour(Material, TexCoords);
+	float opaque = step(0.5, mix(textureColour.a, 1, Colour.a));
+	gPosition = vec4(FragPos, opaque);
+	gNormal = vec4(Normal, opaque);
+	gl_FragDepth = mix(1.0, gl_FragCoord.z, opaque);
+	gAlbedoSpec = mix(textureColour, vec4(Colour.rgb, 1), Colour.a);
+}