Drawable Renderer (#1570), Apply render pass to drawables

include/mbgl/gfx/drawable.hpp

@@ -13,6 +13,7 @@ namespace mbgl {
 
 class Color;
 class PaintParameters;
+enum class RenderPass : uint8_t;
 
 namespace gfx {
 
@@ -45,6 +46,17 @@ public:
     const gfx::ShaderProgramBasePtr& getShader() const { return shader; }
     void setShader(gfx::ShaderProgramBasePtr value) { shader = std::move(value); }
 
+    /// The pass on which we'll be rendered
+    mbgl::RenderPass getRenderPass() const { return renderPass; }
+    void setRenderPass(mbgl::RenderPass value) { renderPass = value; }
+
+    /// Test whether to draw this drawable in a given render pass.
+    /// If multiple render pass bits are set, all must be present.
+    bool hasRenderPass(mbgl::RenderPass value) const {
+        using T = std::underlying_type<mbgl::RenderPass>::type;
+        return (static_cast<T>(renderPass) & static_cast<T>(value)) == static_cast<T>(value);
+    }
+
     /// not used for anything yet
     DrawPriority getDrawPriority() const { return drawPriority; }
     void setDrawPriority(DrawPriority value) { drawPriority = value; }
@@ -89,6 +101,7 @@ protected:
     std::string name;
     util::SimpleIdentity uniqueID;
     gfx::ShaderProgramBasePtr shader;
+    mbgl::RenderPass renderPass;
     mat4 matrix; //= matrix::identity4();
     std::optional<OverscaledTileID> tileID;
     DrawPriority drawPriority = 0;

include/mbgl/gfx/drawable_builder.hpp

@@ -49,6 +49,10 @@ public:
     /// Get the ID of the drawable we're currently working on, if any
     util::SimpleIdentity getDrawableId();
 
+    /// The pass on which we'll be rendered
+    mbgl::RenderPass getRenderPass() const { return renderPass; }
+    void setRenderPass(mbgl::RenderPass value) { renderPass = value; }
+
     /// The draw priority assigned to generated drawables
     DrawPriority getDrawPriority() const;
     void setDrawPriority(DrawPriority);
@@ -118,6 +122,7 @@ protected:
 protected:
     std::string name;
     std::string drawableName;
+    mbgl::RenderPass renderPass;
     DrawPriority drawPriority = 0;
     int32_t layerIndex = -1;
     DepthMaskType depthType = DepthMaskType::ReadOnly;