Initial commit

src/shaders/computeVec4.glsl

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+precision highp float;
+precision highp int;
+precision highp sampler2D;
+precision highp usampler2D;
+precision highp isampler2D;
+precision highp sampler2DArray;
+precision highp usampler2DArray;
+precision highp isampler2DArray;
+precision highp sampler3D;
+precision highp usampler3D;
+precision highp isampler3D;
+
+#include <splatDefines>
+
+uniform uint targetLayer;
+uniform int targetBase;
+uniform int targetCount;
+
+out vec4 target;
+
+{{ GLOBALS }}
+
+void computeReadback(int index) {
+    {{ STATEMENTS }}
+}
+
+void main() {
+    int targetIndex = int(targetLayer << SPLAT_TEX_LAYER_BITS) + int(uint(gl_FragCoord.y) << SPLAT_TEX_WIDTH_BITS) + int(gl_FragCoord.x);
+    int index = targetIndex - targetBase;
+
+    if ((index >= 0) && (index < targetCount)) {
+        computeReadback(index);
+    } else {
+        target = vec4(0.0, 0.0, 0.0, 0.0);
+    }
+}