Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

glsl/combined.vert

@@ -0,0 +1,64 @@
+#version {VERSION}
+
+uniform vec3 Scroll;
+uniform vec3 p1, p2;
+uniform float PaletteRows;
+
+in vec3 aVertexPosition;
+in vec4 aVertexTexCoord;
+in uint aVertexAttributes;
+in vec4 aVertexTint;
+
+out vec4 vTexCoord;
+flat out float vTexPalette;
+flat out vec4 vChannelMask;
+flat out uint vChannelSampler;
+flat out uint vChannelType;
+flat out vec4 vDepthMask;
+flat out uint vDepthSampler;
+out vec4 vTint;
+	
+vec4 SelectChannelMask(uint x)
+{
+	switch (x)
+	{
+		case 7u:
+			return vec4(0.0, 0.0, 0.0, 1.0);
+		case 5u:
+			return vec4(0.0, 0.0, 1.0, 0.0);
+		case 3u:
+			return vec4(0, 1.0, 0.0, 0.0);
+		case 2u:
+			return vec4(1.0, 1.0, 1.0, 1.0);
+		case 1u:
+			return vec4(1.0, 0.0, 0.0, 0.0);
+		default:
+			return vec4(0.0, 0.0, 0.0, 0.0);
+	}
+}
+
+void main()
+{
+	gl_Position = vec4((aVertexPosition - Scroll) * p1 + p2, 1);
+	vTexCoord = aVertexTexCoord;
+
+	// aVertexAttributes is a packed bitfield, where:
+	// Bits 0-2 define the behaviour of the primary texture channel:
+	//    000: Channel is not used (aVertexTexCoord instead defines a color value)
+	//    010: Sample RGBA sprite from all four channels
+	//    001, 011, 101, 111: Sample paletted sprite from channel R,G,B,A
+	// Bits 3-5 define the behaviour of the secondary texture channel:
+	//    000: Channel is not used
+	//    001, 011, 101, 111: Sample depth sprite from channel R,G,B,A
+	// Bits 6-8 define the sampler index (0-7) that the primary texture is bound to
+	// Bits 9-11 define the sampler index (0-7) that the secondary texture is bound to
+	// Bits 16-31 define the palette row for paletted sprites
+	vChannelType = aVertexAttributes & 0x07u;
+	vChannelMask = SelectChannelMask(vChannelType);
+	vDepthMask = SelectChannelMask((aVertexAttributes >> 3) & 0x07u);
+	vChannelSampler = (aVertexAttributes >> 6) & 0x07u;
+	vDepthSampler = (aVertexAttributes >> 9) & 0x07u;
+	vTexPalette = float(aVertexAttributes >> 16) / PaletteRows;
+
+	vTint = aVertexTint;
+}