rework label shader

openVulkanoCpp/Shader/label.vert

@@ -0,0 +1,45 @@
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+
+layout(set = 0, binding = 0) uniform NodeData
+{
+	mat4 world;
+} node;
+
+layout(set = 1, binding = 0) uniform CameraData
+{
+    mat4 viewProjection;
+} cam;
+
+layout(set = 5, binding = 0) uniform LabelData
+{
+   vec4 textSize;
+   vec4 color;
+   vec4 bboxCenter;
+   float radius;
+   float arrowLength;
+   bool hasRoundedCorners;
+   bool hasArrow;
+} labelInfo;
+
+layout(location = 0) out vec4 color;
+layout(location = 1) out vec2 textureCoordinates;
+
+// Background plane positions are in clipped space
+const vec4 PLANE[4] = vec4[](
+        vec4(-0.5, -0.5, 0, 1), vec4(0.5, -0.5, 0, 1), vec4(-0.5, 0.5, 0, 1), vec4(0.5, 0.5, 0, 1)
+
+    );
+const vec2 TEX_COORDS[4] = vec2[](
+        vec2(0, 0), vec2(1, 0), vec2(0, 1), vec2(1, 1)
+    );
+
+void main() {
+    vec4 position = PLANE[gl_VertexIndex];
+    vec2 bbox = labelInfo.textSize.xy;
+    position.xy *= bbox;
+    position.xy += vec2(labelInfo.bboxCenter);
+    position.z = -0.001;
+    gl_Position = cam.viewProjection * node.world * position;
+    textureCoordinates = TEX_COORDS[gl_VertexIndex] * bbox;
+}