Circle layer (#1153)

CMakeLists.txt

@@ -181,6 +181,7 @@ list(APPEND INCLUDE_FILES
     ${PROJECT_SOURCE_DIR}/include/mbgl/platform/thread.hpp
     ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/query.hpp
     ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/layer_group.hpp
+    ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/layer_tweaker.hpp
     ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/renderer.hpp
     ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/renderer_frontend.hpp
     ${PROJECT_SOURCE_DIR}/include/mbgl/renderer/renderer_observer.hpp
@@ -520,6 +521,13 @@ list(APPEND SRC_FILES
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/image_manager.hpp
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/image_manager_observer.hpp
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layer_group.cpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layer_tweaker.cpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/background_layer_tweaker.cpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/background_layer_tweaker.hpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/circle_layer_tweaker.cpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/circle_layer_tweaker.hpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/fill_layer_tweaker.cpp
+    ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/fill_layer_tweaker.hpp
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/render_background_layer.cpp
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/render_background_layer.hpp
     ${PROJECT_SOURCE_DIR}/src/mbgl/renderer/layers/render_circle_layer.cpp
@@ -929,6 +937,7 @@ if(MLN_WITH_OPENGL)
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/prelude.hpp
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/background.hpp
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/drawable_background.hpp
+            ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/drawable_circle.hpp
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/drawable_fill.hpp
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/drawable_fill_outline.hpp
             ${PROJECT_SOURCE_DIR}/include/mbgl/shaders/gl/drawable_fill_outline_pattern.hpp

include/mbgl/gfx/drawable.hpp

@@ -25,7 +25,6 @@ enum class DepthMaskType : bool;
 class DrawableTweaker;
 class ShaderProgramBase;
 using ShaderProgramBasePtr = std::shared_ptr<ShaderProgramBase>;
-using UniformBufferPtr = std::shared_ptr<UniformBuffer>;
 using DrawPriority = int64_t;
 using DrawableTweakerPtr = std::shared_ptr<DrawableTweaker>;
 
@@ -178,12 +177,5 @@ private:
     bool desc;
 };
 
-struct alignas(16) DrawableUBO {
-    std::array<float, 4 * 4> matrix;
-    std::array<float, 2> world;
-    std::array<float, 2> padding;
-};
-static_assert(sizeof(DrawableUBO) % 16 == 0);
-
 } // namespace gfx
 } // namespace mbgl

include/mbgl/renderer/layer_group.hpp

@@ -25,6 +25,9 @@ using DrawablePtr = std::shared_ptr<Drawable>;
 using UniqueDrawable = std::unique_ptr<Drawable>;
 } // namespace gfx
 
+class LayerTweaker;
+using LayerTweakerPtr = std::shared_ptr<LayerTweaker>;
+
 /**
     A layer-like group of drawables, not a group of layers.
  */
@@ -54,8 +57,15 @@ public:
     /// Call the provided function for each drawable in undefined order, allowing ownership to be taken.
     virtual void observeDrawables(std::function<void(gfx::UniqueDrawable&)>) = 0;
 
+    /// Attach a tweaker to be run on this layer group for each frame
+    void setLayerTweaker(LayerTweakerPtr tweaker) { layerTweaker = std::move(tweaker); }
+
+    /// Get the tweaker attached to this layer group
+    const LayerTweakerPtr& getLayerTweaker() const { return layerTweaker; }
+
 protected:
     int32_t layerIndex;
+    LayerTweakerPtr layerTweaker;
 };
 
 /**

include/mbgl/renderer/layer_tweaker.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <mbgl/util/immutable.hpp>
+
+#include <memory>
+
+namespace mbgl {
+
+namespace style {
+class LayerProperties;
+} // namespace style
+
+class PaintParameters;
+class LayerGroup;
+
+/**
+    Base class for layer tweakers, which manipulate layer group per frame
+ */
+class LayerTweaker {
+protected:
+    LayerTweaker() = delete;
+    LayerTweaker(Immutable<style::LayerProperties> properties);
+
+public:
+    virtual ~LayerTweaker() = default;
+
+    virtual void execute(LayerGroup&, const PaintParameters&) = 0;
+
+protected:
+    Immutable<style::LayerProperties> evaluatedProperties;
+};
+
+} // namespace mbgl

include/mbgl/shaders/gl/drawable_background.hpp

@@ -11,10 +11,8 @@ template <>
 struct ShaderSource<BuiltIn::BackgroundShader, gfx::Backend::Type::OpenGL> {
     static constexpr const char* name = "BackgroundShader";
     static constexpr const char* vertex = R"(layout (location = 0) in vec2 a_pos;
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform BackgroundDrawableUBO {
     mat4 u_matrix;
-    vec2 u_world;
-    vec2 pad;
 };
 
 void main() {

include/mbgl/shaders/gl/drawable_circle.hpp

@@ -0,0 +1,234 @@
+// Generated code, do not modify this file!
+// Generated on 2023-05-17T18:24:20.170Z by alex using shaders/generate_shader_code.js
+
+#pragma once
+#include <mbgl/shaders/shader_source.hpp>
+
+namespace mbgl {
+namespace shaders {
+
+template <>
+struct ShaderSource<BuiltIn::CircleShader, gfx::Backend::Type::OpenGL> {
+    static constexpr const char* name = "CircleShader";
+    static constexpr const char* vertex = R"(layout (location = 0) in vec2 a_pos;
+out vec3 v_data;
+
+layout (std140) uniform CircleDrawableUBO {
+    mat4 u_matrix;
+    vec2 u_extrude_scale;
+};
+
+layout (std140) uniform CirclePaintParamsUBO {
+    highp float u_camera_to_center_distance;
+    lowp float u_device_pixel_ratio;
+};
+
+layout (std140) uniform CircleEvaluatedPropsUBO {
+    highp vec4 u_color;
+    highp vec4 u_stroke_color;
+    mediump float u_radius;
+    lowp float u_blur;
+    lowp float u_opacity;
+    mediump float u_stroke_width;
+    lowp float u_stroke_opacity;
+    bool u_scale_with_map;
+    bool u_pitch_with_map;
+};
+
+layout (std140) uniform CircleInterpolateUBO {
+    lowp float u_color_t;
+    lowp float u_radius_t;
+    lowp float u_blur_t;
+    lowp float u_opacity_t;
+    lowp float u_stroke_color_t;
+    lowp float u_stroke_width_t;
+    lowp float u_stroke_opacity_t;
+};
+
+#ifndef HAS_UNIFORM_u_color
+layout (location = 1) in highp vec4 a_color;
+out highp vec4 color;
+#endif
+#ifndef HAS_UNIFORM_u_radius
+layout (location = 2) in mediump vec2 a_radius;
+out mediump float radius;
+#endif
+#ifndef HAS_UNIFORM_u_blur
+layout (location = 3) in lowp vec2 a_blur;
+out lowp float blur;
+#endif
+#ifndef HAS_UNIFORM_u_opacity
+layout (location = 4) in lowp vec2 a_opacity;
+out lowp float opacity;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_color
+layout (location = 5) in highp vec4 a_stroke_color;
+out highp vec4 stroke_color;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_width
+layout (location = 6) in mediump vec2 a_stroke_width;
+out mediump float stroke_width;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_opacity
+layout (location = 7) in lowp vec2 a_stroke_opacity;
+out lowp float stroke_opacity;
+#endif
+
+void main(void) {
+    #ifndef HAS_UNIFORM_u_color
+color = unpack_mix_color(a_color, u_color_t);
+#else
+highp vec4 color = u_color;
+#endif
+    #ifndef HAS_UNIFORM_u_radius
+radius = unpack_mix_vec2(a_radius, u_radius_t);
+#else
+mediump float radius = u_radius;
+#endif
+    #ifndef HAS_UNIFORM_u_blur
+blur = unpack_mix_vec2(a_blur, u_blur_t);
+#else
+lowp float blur = u_blur;
+#endif
+    #ifndef HAS_UNIFORM_u_opacity
+opacity = unpack_mix_vec2(a_opacity, u_opacity_t);
+#else
+lowp float opacity = u_opacity;
+#endif
+    #ifndef HAS_UNIFORM_u_stroke_color
+stroke_color = unpack_mix_color(a_stroke_color, u_stroke_color_t);
+#else
+highp vec4 stroke_color = u_stroke_color;
+#endif
+    #ifndef HAS_UNIFORM_u_stroke_width
+stroke_width = unpack_mix_vec2(a_stroke_width, u_stroke_width_t);
+#else
+mediump float stroke_width = u_stroke_width;
+#endif
+    #ifndef HAS_UNIFORM_u_stroke_opacity
+stroke_opacity = unpack_mix_vec2(a_stroke_opacity, u_stroke_opacity_t);
+#else
+lowp float stroke_opacity = u_stroke_opacity;
+#endif
+
+    // unencode the extrusion vector that we snuck into the a_pos vector
+    vec2 extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
+
+    // multiply a_pos by 0.5, since we had it * 2 in order to sneak
+    // in extrusion data
+    vec2 circle_center = floor(a_pos * 0.5);
+    if (u_pitch_with_map) {
+        vec2 corner_position = circle_center;
+        if (u_scale_with_map) {
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale;
+        } else {
+            // Pitching the circle with the map effectively scales it with the map
+            // To counteract the effect for pitch-scale: viewport, we rescale the
+            // whole circle based on the pitch scaling effect at its central point
+            vec4 projected_center = u_matrix * vec4(circle_center, 0, 1);
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale * (projected_center.w / u_camera_to_center_distance);
+        }
+
+        gl_Position = u_matrix * vec4(corner_position, 0, 1);
+    } else {
+        gl_Position = u_matrix * vec4(circle_center, 0, 1);
+
+        if (u_scale_with_map) {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * u_camera_to_center_distance;
+        } else {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * gl_Position.w;
+        }
+    }
+
+    // This is a minimum blur distance that serves as a faux-antialiasing for
+    // the circle. since blur is a ratio of the circle's size and the intent is
+    // to keep the blur at roughly 1px, the two are inversely related.
+    lowp float antialiasblur = 1.0 / u_device_pixel_ratio / (radius + stroke_width);
+
+    v_data = vec3(extrude.x, extrude.y, antialiasblur);
+}
+)";
+    static constexpr const char* fragment = R"(in vec3 v_data;
+
+layout (std140) uniform CircleEvaluatedPropsUBO {
+    highp vec4 u_color;
+    highp vec4 u_stroke_color;
+    mediump float u_radius;
+    lowp float u_blur;
+    lowp float u_opacity;
+    mediump float u_stroke_width;
+    lowp float u_stroke_opacity;
+    bool u_scale_with_map;
+    bool u_pitch_with_map;
+};
+
+#ifndef HAS_UNIFORM_u_color
+in highp vec4 color;
+#endif
+#ifndef HAS_UNIFORM_u_radius
+in mediump float radius;
+#endif
+#ifndef HAS_UNIFORM_u_blur
+in lowp float blur;
+#endif
+#ifndef HAS_UNIFORM_u_opacity
+in lowp float opacity;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_color
+in highp vec4 stroke_color;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_width
+in mediump float stroke_width;
+#endif
+#ifndef HAS_UNIFORM_u_stroke_opacity
+in lowp float stroke_opacity;
+#endif
+
+void main() {
+    #ifdef HAS_UNIFORM_u_color
+highp vec4 color = u_color;
+#endif
+    #ifdef HAS_UNIFORM_u_radius
+mediump float radius = u_radius;
+#endif
+    #ifdef HAS_UNIFORM_u_blur
+lowp float blur = u_blur;
+#endif
+    #ifdef HAS_UNIFORM_u_opacity
+lowp float opacity = u_opacity;
+#endif
+    #ifdef HAS_UNIFORM_u_stroke_color
+highp vec4 stroke_color = u_stroke_color;
+#endif
+    #ifdef HAS_UNIFORM_u_stroke_width
+mediump float stroke_width = u_stroke_width;
+#endif
+    #ifdef HAS_UNIFORM_u_stroke_opacity
+lowp float stroke_opacity = u_stroke_opacity;
+#endif
+
+    vec2 extrude = v_data.xy;
+    float extrude_length = length(extrude);
+
+    lowp float antialiasblur = v_data.z;
+    float antialiased_blur = -max(blur, antialiasblur);
+
+    float opacity_t = smoothstep(0.0, antialiased_blur, extrude_length - 1.0);
+
+    float color_t = stroke_width < 0.01 ? 0.0 : smoothstep(
+        antialiased_blur,
+        0.0,
+        extrude_length - radius / (radius + stroke_width)
+    );
+
+    fragColor = opacity_t * mix(color * opacity, stroke_color * stroke_opacity, color_t);
+
+#ifdef OVERDRAW_INSPECTOR
+    fragColor = vec4(1.0);
+#endif
+}
+)";
+};
+
+} // namespace shaders
+} // namespace mbgl

include/mbgl/shaders/gl/drawable_fill.hpp

@@ -12,7 +12,7 @@ struct ShaderSource<BuiltIn::FillShader, gfx::Backend::Type::OpenGL> {
     static constexpr const char* name = "FillShader";
     static constexpr const char* vertex = R"(layout (location = 0) in vec2 a_pos;
 
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform FillDrawableUBO {
     mat4 u_matrix;
     vec2 u_world;
     vec2 pad;

include/mbgl/shaders/gl/drawable_fill_outline.hpp

@@ -12,7 +12,7 @@ struct ShaderSource<BuiltIn::FillOutlineShader, gfx::Backend::Type::OpenGL> {
     static constexpr const char* name = "FillOutlineShader";
     static constexpr const char* vertex = R"(layout (location = 0) in vec2 a_pos;
 
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform FillDrawableUBO {
     mat4 u_matrix;
     vec2 u_world;
     vec2 pad;

include/mbgl/shaders/shader_manifest.hpp

@@ -6,6 +6,7 @@
 
 #ifdef MBGL_RENDER_BACKEND_OPENGL
 #include <mbgl/shaders/gl/drawable_background.hpp>
+#include <mbgl/shaders/gl/drawable_circle.hpp>
 #include <mbgl/shaders/gl/drawable_fill.hpp>
 #include <mbgl/shaders/gl/drawable_fill_outline.hpp>
 #include <mbgl/shaders/gl/drawable_fill_pattern.hpp>

include/mbgl/shaders/shader_source.hpp

@@ -12,6 +12,7 @@ namespace shaders {
 enum class BuiltIn {
     None,
     BackgroundShader,
+    CircleShader,
     FillShader,
     FillOutlineShader,
     FillPatternShader,

shaders/drawable.background.vertex.glsl

@@ -1,5 +1,5 @@
 layout (location = 0) in vec2 a_pos;
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform BackgroundDrawableUBO {
     mat4 u_matrix;
     vec2 u_world;
     vec2 pad;

shaders/drawable.circle.fragment.glsl

@@ -0,0 +1,51 @@
+in vec3 v_data;
+
+layout (std140) uniform CircleEvaluatedPropsUBO {
+    highp vec4 u_color;
+    mediump float u_radius;
+    lowp float u_blur;
+    lowp float u_opacity;
+    highp vec4 u_stroke_color;
+    mediump float u_stroke_width;
+    lowp float u_stroke_opacity;
+    bool u_scale_with_map;
+    bool u_pitch_with_map;
+};
+
+#pragma mapbox: define highp vec4 color
+#pragma mapbox: define mediump float radius
+#pragma mapbox: define lowp float blur
+#pragma mapbox: define lowp float opacity
+#pragma mapbox: define highp vec4 stroke_color
+#pragma mapbox: define mediump float stroke_width
+#pragma mapbox: define lowp float stroke_opacity
+
+void main() {
+    #pragma mapbox: initialize highp vec4 color
+    #pragma mapbox: initialize mediump float radius
+    #pragma mapbox: initialize lowp float blur
+    #pragma mapbox: initialize lowp float opacity
+    #pragma mapbox: initialize highp vec4 stroke_color
+    #pragma mapbox: initialize mediump float stroke_width
+    #pragma mapbox: initialize lowp float stroke_opacity
+
+    vec2 extrude = v_data.xy;
+    float extrude_length = length(extrude);
+
+    lowp float antialiasblur = v_data.z;
+    float antialiased_blur = -max(blur, antialiasblur);
+
+    float opacity_t = smoothstep(0.0, antialiased_blur, extrude_length - 1.0);
+
+    float color_t = stroke_width < 0.01 ? 0.0 : smoothstep(
+        antialiased_blur,
+        0.0,
+        extrude_length - radius / (radius + stroke_width)
+    );
+
+    fragColor = opacity_t * mix(color * opacity, stroke_color * stroke_opacity, color_t);
+
+#ifdef OVERDRAW_INSPECTOR
+    fragColor = vec4(1.0);
+#endif
+}

shaders/drawable.circle.vertex.glsl

@@ -0,0 +1,88 @@
+layout (location = 0) in vec2 a_pos;
+out vec3 v_data;
+
+layout (std140) uniform CircleDrawableUBO {
+    mat4 u_matrix;
+    vec2 u_extrude_scale;
+};
+
+layout (std140) uniform CirclePaintParamsUBO {
+    highp float u_camera_to_center_distance;
+    lowp float u_device_pixel_ratio;
+};
+
+layout (std140) uniform CircleEvaluatedPropsUBO {
+    highp vec4 u_color;
+    highp vec4 u_stroke_color;
+    mediump float u_radius;
+    lowp float u_blur;
+    lowp float u_opacity;
+    mediump float u_stroke_width;
+    lowp float u_stroke_opacity;
+    bool u_scale_with_map;
+    bool u_pitch_with_map;
+};
+
+layout (std140) uniform CircleInterpolateUBO {
+    lowp float u_color_t;
+    lowp float u_radius_t;
+    lowp float u_blur_t;
+    lowp float u_opacity_t;
+    lowp float u_stroke_color_t;
+    lowp float u_stroke_width_t;
+    lowp float u_stroke_opacity_t;
+};
+
+#pragma mapbox: define highp vec4 color
+#pragma mapbox: define mediump float radius
+#pragma mapbox: define lowp float blur
+#pragma mapbox: define lowp float opacity
+#pragma mapbox: define highp vec4 stroke_color
+#pragma mapbox: define mediump float stroke_width
+#pragma mapbox: define lowp float stroke_opacity
+
+void main(void) {
+    #pragma mapbox: initialize highp vec4 color
+    #pragma mapbox: initialize mediump float radius
+    #pragma mapbox: initialize lowp float blur
+    #pragma mapbox: initialize lowp float opacity
+    #pragma mapbox: initialize highp vec4 stroke_color
+    #pragma mapbox: initialize mediump float stroke_width
+    #pragma mapbox: initialize lowp float stroke_opacity
+
+    // unencode the extrusion vector that we snuck into the a_pos vector
+    vec2 extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
+
+    // multiply a_pos by 0.5, since we had it * 2 in order to sneak
+    // in extrusion data
+    vec2 circle_center = floor(a_pos * 0.5);
+    if (u_pitch_with_map) {
+        vec2 corner_position = circle_center;
+        if (u_scale_with_map) {
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale;
+        } else {
+            // Pitching the circle with the map effectively scales it with the map
+            // To counteract the effect for pitch-scale: viewport, we rescale the
+            // whole circle based on the pitch scaling effect at its central point
+            vec4 projected_center = u_matrix * vec4(circle_center, 0, 1);
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale * (projected_center.w / u_camera_to_center_distance);
+        }
+
+        gl_Position = u_matrix * vec4(corner_position, 0, 1);
+    } else {
+        gl_Position = u_matrix * vec4(circle_center, 0, 1);
+
+        if (u_scale_with_map) {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * u_camera_to_center_distance;
+        } else {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * gl_Position.w;
+        }
+    }
+
+    // This is a minimum blur distance that serves as a faux-antialiasing for
+    // the circle. since blur is a ratio of the circle's size and the intent is
+    // to keep the blur at roughly 1px, the two are inversely related.
+    lowp float antialiasblur = 1.0 / u_device_pixel_ratio / (radius + stroke_width);
+
+    v_data = vec3(extrude.x, extrude.y, antialiasblur);
+}

shaders/drawable.fill.vertex.glsl

@@ -1,6 +1,6 @@
 layout (location = 0) in vec2 a_pos;
 
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform FillDrawableUBO {
     mat4 u_matrix;
     vec2 u_world;
     vec2 pad;

shaders/drawable.fill_outline.vertex.glsl

@@ -1,6 +1,6 @@
 layout (location = 0) in vec2 a_pos;
 
-layout (std140) uniform DrawableUBO {
+layout (std140) uniform FillDrawableUBO {
     mat4 u_matrix;
     vec2 u_world;
     vec2 pad;

shaders/manifest.json

@@ -6,6 +6,13 @@
         "glsl_frag": "drawable.background.fragment.glsl",
         "uses_ubos": true
     },
+    {
+        "name": "CircleShader",
+        "header": "drawable_circle",
+        "glsl_vert": "drawable.circle.vertex.glsl",
+        "glsl_frag": "drawable.circle.fragment.glsl",
+        "uses_ubos": true 
+    },
     {
         "name": "FillShader",
         "header": "drawable_fill",

src/mbgl/gl/layer_group_gl.cpp

@@ -81,22 +81,6 @@ void TileLayerGroupGL::render(RenderOrchestrator&, PaintParameters& parameters)
         const auto labelPtr = (label.empty() ? drawable.getName() : label).c_str();
         const auto debugGroup = parameters.encoder->createDebugGroup(labelPtr);
 
-        mat4 matrix = drawable.getMatrix();
-        if (drawable.getTileID()) {
-            const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
-            const auto tileMat = parameters.matrixForTile(tileID);
-            matrix::multiply(matrix, drawable.getMatrix(), tileMat);
-            matrix = tileMat;
-        }
-
-        const auto renderableSize = parameters.backend.getDefaultRenderable().getSize();
-
-        gfx::DrawableUBO drawableUBO;
-        drawableUBO.matrix = util::cast<float>(matrix);
-        drawableUBO.world = {(float)renderableSize.width, (float)renderableSize.height};
-        auto uniformBuffer = context.createUniformBuffer(&drawableUBO, sizeof(drawableUBO));
-        drawable.mutableUniformBuffers().addOrReplace("DrawableUBO", uniformBuffer);
-
         drawable.draw(parameters);
     });
 }

src/mbgl/gl/renderer_backend.cpp

@@ -94,6 +94,7 @@ void registerTypes(gfx::ShaderRegistry& registry, gl::Context& glContext, const
 
 void RendererBackend::initShaders(gfx::ShaderRegistry& shaders, const ProgramParameters& programParameters) {
     registerTypes<shaders::BuiltIn::BackgroundShader,
+                  shaders::BuiltIn::CircleShader,
                   shaders::BuiltIn::FillShader,
                   shaders::BuiltIn::FillOutlineShader,
                   shaders::BuiltIn::FillOutlinePatternShader,

src/mbgl/renderer/layer_tweaker.cpp

@@ -0,0 +1,9 @@
+#include <mbgl/renderer/layer_tweaker.hpp>
+#include <mbgl/style/layer_properties.hpp>
+
+namespace mbgl {
+
+LayerTweaker::LayerTweaker(Immutable<style::LayerProperties> properties)
+    : evaluatedProperties(std::move(properties)){};
+
+}

src/mbgl/renderer/layers/background_layer_tweaker.cpp

@@ -0,0 +1,72 @@
+#include <mbgl/renderer/layers/background_layer_tweaker.hpp>
+#include <mbgl/renderer/layer_group.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/style/layers/background_layer_properties.hpp>
+#include <mbgl/gfx/context.hpp>
+#include <mbgl/gfx/drawable.hpp>
+#include <mbgl/util/convert.hpp>
+
+namespace mbgl {
+
+using namespace style;
+
+struct alignas(16) BackgroundDrawableUBO {
+    std::array<float, 4 * 4> matrix;
+};
+static_assert(sizeof(BackgroundDrawableUBO) % 16 == 0);
+
+struct alignas(16) BackgroundLayerUBO {
+    Color color;
+    float opacity;
+    float padding[3];
+};
+static_assert(sizeof(BackgroundLayerUBO) % 16 == 0);
+
+struct alignas(16) BackgroundPatternLayerUBO {
+    std::array<float, 2> pattern_tl_a;
+    std::array<float, 2> pattern_br_a;
+    std::array<float, 2> pattern_tl_b;
+    std::array<float, 2> pattern_br_b;
+    std::array<float, 2> texsize;
+    std::array<float, 2> pattern_size_a;
+    std::array<float, 2> pattern_size_b;
+    std::array<float, 2> pixel_coord_upper;
+    std::array<float, 2> pixel_coord_lower;
+    float tile_units_to_pixels;
+    float scale_a;
+    float scale_b;
+    float mix;
+    float opacity;
+};
+static_assert(sizeof(BackgroundPatternLayerUBO) % 16 == 0);
+
+void BackgroundLayerTweaker::execute(LayerGroup& layerGroup, const PaintParameters& parameters) {
+    const auto& evaluated = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).evaluated;
+
+    if (!layerUniformBuffer) {
+        BackgroundLayerUBO layerUBO;
+        layerUBO.color = evaluated.get<BackgroundColor>();
+        layerUBO.opacity = evaluated.get<BackgroundOpacity>();
+        layerUniformBuffer = parameters.context.createUniformBuffer(&layerUBO, sizeof(layerUBO));
+    }
+
+    layerGroup.observeDrawables([&](gfx::Drawable& drawable) {
+        drawable.mutableUniformBuffers().addOrReplace("BackgroundLayerUBO", layerUniformBuffer);
+
+        if (!drawable.getTileID()) {
+            return;
+        }
+        mat4 matrix = drawable.getMatrix();
+        const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
+        const auto tileMat = parameters.matrixForTile(tileID);
+        matrix::multiply(matrix, drawable.getMatrix(), tileMat);
+        matrix = tileMat;
+
+        BackgroundDrawableUBO drawableUBO;
+        drawableUBO.matrix = util::cast<float>(matrix);
+        auto drawableUniformBuffer = parameters.context.createUniformBuffer(&drawableUBO, sizeof(drawableUBO));
+        drawable.mutableUniformBuffers().addOrReplace("BackgroundDrawableUBO", drawableUniformBuffer);
+    });
+}
+
+} // namespace mbgl

src/mbgl/renderer/layers/background_layer_tweaker.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <mbgl/renderer/layer_tweaker.hpp>
+
+namespace mbgl {
+
+namespace gfx {
+class UniformBuffer;
+using UniformBufferPtr = std::shared_ptr<UniformBuffer>;
+} // namespace gfx
+
+/**
+    Background layer specific tweaker
+ */
+class BackgroundLayerTweaker : public LayerTweaker {
+public:
+    BackgroundLayerTweaker(Immutable<style::LayerProperties> properties)
+        : LayerTweaker(properties){};
+
+public:
+    ~BackgroundLayerTweaker() override = default;
+
+    void execute(LayerGroup&, const PaintParameters&) override;
+
+protected:
+    gfx::UniformBufferPtr layerUniformBuffer = nullptr;
+};
+
+} // namespace mbgl

src/mbgl/renderer/layers/circle_layer_tweaker.cpp

@@ -0,0 +1,110 @@
+#include <mbgl/renderer/layers/circle_layer_tweaker.hpp>
+#include <mbgl/renderer/layer_group.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/style/layers/circle_layer_properties.hpp>
+#include <mbgl/gfx/context.hpp>
+#include <mbgl/gfx/drawable.hpp>
+#include <mbgl/util/convert.hpp>
+
+namespace mbgl {
+
+using namespace style;
+
+struct alignas(16) CircleDrawableUBO {
+    std::array<float, 4 * 4> matrix;
+    std::array<float, 2> extrude_scale;
+};
+static_assert(sizeof(CircleDrawableUBO) % 16 == 0);
+
+struct alignas(16) CirclePaintParamsUBO {
+    float camera_to_center_distance;
+    float device_pixel_ratio;
+};
+static_assert(sizeof(CirclePaintParamsUBO) % 16 == 0);
+
+struct alignas(16) CircleEvaluatedPropsUBO {
+    Color color;
+    Color stroke_color;
+    float radius;
+    float blur;
+    float opacity;
+    float stroke_width;
+    float stroke_opacity;
+    int scale_with_map;
+    int pitch_with_map;
+};
+static_assert(sizeof(CircleEvaluatedPropsUBO) % 16 == 0);
+
+struct alignas(16) CircleInterpolateUBO {
+    float color_t;
+    float radius_t;
+    float blur_t;
+    float opacity_t;
+    float stroke_color_t;
+    float stroke_width_t;
+    float stroke_opacity_t;
+};
+static_assert(sizeof(CircleInterpolateUBO) % 16 == 0);
+
+void CircleLayerTweaker::execute(LayerGroup& layerGroup, const PaintParameters& parameters) {
+    const auto& evaluated = static_cast<const CircleLayerProperties&>(*evaluatedProperties).evaluated;
+
+    CirclePaintParamsUBO paintParamsUBO;
+    paintParamsUBO.camera_to_center_distance = parameters.state.getCameraToCenterDistance();
+    paintParamsUBO.device_pixel_ratio = parameters.pixelRatio;
+    auto paintParamsUniformBuffer = parameters.context.createUniformBuffer(&paintParamsUBO, sizeof(paintParamsUBO));
+
+    const bool pitchWithMap = evaluated.get<CirclePitchAlignment>() == AlignmentType::Map;
+
+    if (!evaluatedPropsUniformBuffer) {
+        CircleEvaluatedPropsUBO evaluatedPropsUBO;
+        evaluatedPropsUBO.color = evaluated.get<CircleColor>().constantOr(Color());
+        evaluatedPropsUBO.radius = evaluated.get<CircleRadius>().constantOr(0);
+        evaluatedPropsUBO.blur = evaluated.get<CircleBlur>().constantOr(0);
+        evaluatedPropsUBO.opacity = evaluated.get<CircleOpacity>().constantOr(0);
+        evaluatedPropsUBO.stroke_color = evaluated.get<CircleStrokeColor>().constantOr(Color());
+        evaluatedPropsUBO.stroke_width = evaluated.get<CircleStrokeWidth>().constantOr(0);
+        evaluatedPropsUBO.stroke_opacity = evaluated.get<CircleStrokeOpacity>().constantOr(0);
+        evaluatedPropsUBO.scale_with_map = evaluated.get<CirclePitchScale>() == CirclePitchScaleType::Map;
+        evaluatedPropsUBO.pitch_with_map = pitchWithMap;
+        evaluatedPropsUniformBuffer = parameters.context.createUniformBuffer(&evaluatedPropsUBO,
+                                                                             sizeof(evaluatedPropsUBO));
+    }
+
+    CircleInterpolateUBO interpolateUBO;
+    interpolateUBO.color_t = 0;
+    interpolateUBO.radius_t = 0;
+    interpolateUBO.blur_t = 0;
+    interpolateUBO.opacity_t = 0;
+    interpolateUBO.stroke_color_t = 0;
+    interpolateUBO.stroke_width_t = 0;
+    interpolateUBO.stroke_opacity_t = 0;
+    auto interpolateUniformBuffer = parameters.context.createUniformBuffer(&interpolateUBO, sizeof(interpolateUBO));
+
+    layerGroup.observeDrawables([&](gfx::Drawable& drawable) {
+        drawable.mutableUniformBuffers().addOrReplace("CirclePaintParamsUBO", paintParamsUniformBuffer);
+        drawable.mutableUniformBuffers().addOrReplace("CircleEvaluatedPropsUBO", evaluatedPropsUniformBuffer);
+        drawable.mutableUniformBuffers().addOrReplace("CircleInterpolateUBO", interpolateUniformBuffer);
+
+        if (!drawable.getTileID()) {
+            return;
+        }
+        mat4 matrix = drawable.getMatrix();
+        const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
+        const auto tileMat = parameters.matrixForTile(tileID);
+        matrix::multiply(matrix, drawable.getMatrix(), tileMat);
+        matrix = tileMat;
+
+        CircleDrawableUBO drawableUBO;
+        drawableUBO.matrix = util::cast<float>(matrix);
+        drawableUBO.extrude_scale =
+            pitchWithMap
+                ? std::array<float, 2>{{tileID.pixelsToTileUnits(1.0f, static_cast<float>(parameters.state.getZoom())),
+                                        tileID.pixelsToTileUnits(1.0f, static_cast<float>(parameters.state.getZoom()))}}
+                : parameters.pixelsToGLUnits;
+        auto drawableUniformBuffer = parameters.context.createUniformBuffer(&drawableUBO, sizeof(drawableUBO));
+        drawable.mutableUniformBuffers().addOrReplace("CircleDrawableUBO", drawableUniformBuffer);
+    });
+}
+
+} // namespace mbgl

src/mbgl/renderer/layers/circle_layer_tweaker.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <mbgl/renderer/layer_tweaker.hpp>
+
+namespace mbgl {
+
+namespace gfx {
+class UniformBuffer;
+using UniformBufferPtr = std::shared_ptr<UniformBuffer>;
+} // namespace gfx
+
+/**
+    Circle layer specific tweaker
+ */
+class CircleLayerTweaker : public LayerTweaker {
+public:
+    CircleLayerTweaker(Immutable<style::LayerProperties> properties)
+        : LayerTweaker(properties){};
+
+public:
+    ~CircleLayerTweaker() override = default;
+
+    void execute(LayerGroup&, const PaintParameters&) override;
+
+protected:
+    gfx::UniformBufferPtr evaluatedPropsUniformBuffer = nullptr;
+};
+
+} // namespace mbgl

src/mbgl/renderer/layers/fill_layer_tweaker.cpp

@@ -0,0 +1,61 @@
+#include <mbgl/renderer/layers/fill_layer_tweaker.hpp>
+#include <mbgl/renderer/layer_group.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/style/layers/fill_layer_properties.hpp>
+#include <mbgl/gfx/context.hpp>
+#include <mbgl/gfx/drawable.hpp>
+#include <mbgl/gfx/renderable.hpp>
+#include <mbgl/gfx/renderer_backend.hpp>
+#include <mbgl/util/convert.hpp>
+
+namespace mbgl {
+
+using namespace style;
+
+struct alignas(16) FillDrawableUBO {
+    std::array<float, 4 * 4> matrix;
+    std::array<float, 2> world;
+    std::array<float, 2> padding;
+};
+static_assert(sizeof(FillDrawableUBO) % 16 == 0);
+
+void FillLayerTweaker::execute(LayerGroup& layerGroup, const PaintParameters& parameters) {
+    // const auto& evaluated = static_cast<const FillLayerProperties&>(*evaluatedProperties).evaluated;
+
+    layerGroup.observeDrawables([&](gfx::Drawable& drawable) {
+        if (!drawable.getTileID()) {
+            return;
+        }
+        /*mat4 matrix = drawable.getMatrix();
+        if (drawable.getTileID()) {
+            const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
+            const auto tileMat = parameters.matrixForTile(tileID);
+            matrix::multiply(matrix, drawable.getMatrix(), tileMat);
+            matrix = tileMat;
+        }
+
+        const auto renderableSize = parameters.backend.getDefaultRenderable().getSize();
+
+        gfx::DrawableUBO drawableUBO;
+        drawableUBO.matrix = util::cast<float>(matrix);
+        drawableUBO.world = {(float)renderableSize.width, (float)renderableSize.height};
+        auto uniformBuffer = context.createUniformBuffer(&drawableUBO, sizeof(drawableUBO));
+        drawable.mutableUniformBuffers().addOrReplace("DrawableUBO", uniformBuffer);*/
+
+        mat4 matrix = drawable.getMatrix();
+        const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
+        const auto tileMat = parameters.matrixForTile(tileID);
+        matrix::multiply(matrix, drawable.getMatrix(), tileMat);
+        matrix = tileMat;
+
+        const auto renderableSize = parameters.backend.getDefaultRenderable().getSize();
+
+        FillDrawableUBO drawableUBO;
+        drawableUBO.matrix = util::cast<float>(matrix);
+        drawableUBO.world = {(float)renderableSize.width, (float)renderableSize.height};
+        auto drawableUniformBuffer = parameters.context.createUniformBuffer(&drawableUBO, sizeof(drawableUBO));
+        drawable.mutableUniformBuffers().addOrReplace("FillDrawableUBO", drawableUniformBuffer);
+    });
+}
+
+} // namespace mbgl

src/mbgl/renderer/layers/fill_layer_tweaker.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <mbgl/renderer/layer_tweaker.hpp>
+
+namespace mbgl {
+
+/**
+    Fill layer specific tweaker
+ */
+class FillLayerTweaker : public LayerTweaker {
+public:
+    FillLayerTweaker(Immutable<style::LayerProperties> properties)
+        : LayerTweaker(properties){};
+
+public:
+    ~FillLayerTweaker() override = default;
+
+    void execute(LayerGroup&, const PaintParameters&) override;
+};
+
+} // namespace mbgl

src/mbgl/renderer/layers/render_background_layer.cpp

@@ -1,5 +1,5 @@
 #include <mbgl/renderer/layers/render_background_layer.hpp>
-
+#include <mbgl/renderer/layers/background_layer_tweaker.hpp>
 #include <mbgl/gfx/context.hpp>
 #include <mbgl/gfx/cull_face_mode.hpp>
 #include <mbgl/gfx/shader_registry.hpp>
@@ -62,7 +62,9 @@ void RenderBackgroundLayer::evaluate(const PropertyEvaluationParameters& paramet
     properties->renderPasses = mbgl::underlying_type(passes);
 
     evaluatedProperties = std::move(properties);
-    evaluatedPropertiesChange = true;
+    if (tileLayerGroup) {
+        tileLayerGroup->setLayerTweaker(std::make_shared<BackgroundLayerTweaker>(evaluatedProperties));
+    }
 }
 
 bool RenderBackgroundLayer::hasTransition() const {
@@ -73,10 +75,16 @@ bool RenderBackgroundLayer::hasCrossfade() const {
     return getCrossfade<BackgroundLayerProperties>(evaluatedProperties).t != 1;
 }
 
+static bool enableDefaultRender = false;
+
 void RenderBackgroundLayer::render(PaintParameters& parameters) {
     // Note that for bottommost layers without a pattern, the background color
     // is drawn with glClear rather than this method.
 
+    if (!enableDefaultRender) {
+        return;
+    }
+
     // Ensure programs are available
     if (!parameters.shaders.populate(backgroundProgram)) return;
     if (!parameters.shaders.populate(backgroundPatternProgram)) return;
@@ -210,6 +218,10 @@ void RenderBackgroundLayer::update(const int32_t layerIndex,
                                    gfx::Context& context,
                                    const TransformState& state,
                                    UniqueChangeRequestVec& changes) {
+    if (enableDefaultRender) {
+        return;
+    }
+
     std::unique_lock<std::mutex> guard(mutex);
 
     if (!shader) {
@@ -253,19 +265,12 @@ void RenderBackgroundLayer::update(const int32_t layerIndex,
         return;
     }
 
-    if (evaluatedPropertiesChange) {
-        BackgroundLayerUBO backgroundLayerUBO;
-        backgroundLayerUBO.color = evaluated.get<BackgroundColor>();
-        backgroundLayerUBO.opacity = evaluated.get<BackgroundOpacity>();
-        uniformBuffer = context.createUniformBuffer(&backgroundLayerUBO, sizeof(backgroundLayerUBO));
-        evaluatedPropertiesChange = false;
-    }
-
     if (!tileLayerGroup) {
         tileLayerGroup = context.createTileLayerGroup(layerIndex, /*initialCapacity=*/64);
         if (!tileLayerGroup) {
             return;
         }
+        tileLayerGroup->setLayerTweaker(std::make_shared<BackgroundLayerTweaker>(evaluatedProperties));
         changes.emplace_back(std::make_unique<AddLayerGroupRequest>(tileLayerGroup, /*canReplace=*/true));
     }
 
@@ -306,7 +311,6 @@ void RenderBackgroundLayer::update(const int32_t layerIndex,
 
             if (tileDrawable) {
                 // Already created, update it.
-                tileDrawable->mutableUniformBuffers().addOrReplace("BackgroundLayerUBO", uniformBuffer);
                 continue;
             }
 
@@ -332,7 +336,6 @@ void RenderBackgroundLayer::update(const int32_t layerIndex,
             if (!newDrawables.empty()) {
                 auto& drawable = newDrawables[0];
                 drawable->setTileID(tileID);
-                drawable->mutableUniformBuffers().addOrReplace("BackgroundLayerUBO", uniformBuffer);
                 tileLayerGroup->addDrawable(renderPass, tileID, std::move(drawable));
                 ++stats.tileDrawablesAdded;
             }

src/mbgl/renderer/layers/render_background_layer.hpp

@@ -52,29 +52,4 @@ private:
     gfx::ShaderProgramBasePtr shader;
 };
 
-struct alignas(16) BackgroundLayerUBO {
-    Color color;
-    float opacity;
-    float padding[3];
-};
-static_assert(sizeof(BackgroundLayerUBO) % 16 == 0);
-
-struct alignas(16) BackgroundPatternLayerUBO {
-    std::array<float, 2> pattern_tl_a;
-    std::array<float, 2> pattern_br_a;
-    std::array<float, 2> pattern_tl_b;
-    std::array<float, 2> pattern_br_b;
-    std::array<float, 2> texsize;
-    std::array<float, 2> pattern_size_a;
-    std::array<float, 2> pattern_size_b;
-    std::array<float, 2> pixel_coord_upper;
-    std::array<float, 2> pixel_coord_lower;
-    float tile_units_to_pixels;
-    float scale_a;
-    float scale_b;
-    float mix;
-    float opacity;
-};
-static_assert(sizeof(BackgroundPatternLayerUBO) % 16 == 0);
-
 } // namespace mbgl

src/mbgl/renderer/layers/render_circle_layer.cpp

@@ -1,5 +1,7 @@
 #include <mbgl/renderer/layers/render_circle_layer.hpp>
+#include <mbgl/renderer/layers/circle_layer_tweaker.hpp>
 #include <mbgl/renderer/buckets/circle_bucket.hpp>
+#include <mbgl/renderer/layer_group.hpp>
 #include <mbgl/renderer/render_tile.hpp>
 #include <mbgl/renderer/paint_parameters.hpp>
 #include <mbgl/programs/programs.hpp>
@@ -7,6 +9,7 @@
 #include <mbgl/tile/tile.hpp>
 #include <mbgl/style/layers/circle_layer_impl.hpp>
 #include <mbgl/geometry/feature_index.hpp>
+#include <mbgl/gfx/drawable_builder.hpp>
 #include <mbgl/gfx/cull_face_mode.hpp>
 #include <mbgl/gfx/shader_registry.hpp>
 #include <mbgl/util/math.hpp>
@@ -69,6 +72,9 @@ void RenderCircleLayer::evaluate(const PropertyEvaluationParameters& parameters)
                  : RenderPass::None;
     properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
+    if (tileLayerGroup) {
+        tileLayerGroup->setLayerTweaker(std::make_shared<CircleLayerTweaker>(evaluatedProperties));
+    }
 }
 
 bool RenderCircleLayer::hasTransition() const {
@@ -79,8 +85,15 @@ bool RenderCircleLayer::hasCrossfade() const {
     return false;
 }
 
+static bool enableDefaultRender = false;
+
 void RenderCircleLayer::render(PaintParameters& parameters) {
     assert(renderTiles);
+
+    if (!enableDefaultRender) {
+        return;
+    }
+
     if (parameters.pass == RenderPass::Opaque) {
         return;
     }
@@ -236,4 +249,214 @@ bool RenderCircleLayer::queryIntersectsFeature(const GeometryCoordinates& queryG
     return false;
 }
 
+void RenderCircleLayer::layerRemoved(UniqueChangeRequestVec& changes) {
+    // Remove everything
+    if (tileLayerGroup) {
+        changes.emplace_back(std::make_unique<RemoveLayerGroupRequest>(tileLayerGroup->getLayerIndex()));
+        tileLayerGroup.reset();
+    }
+}
+
+void RenderCircleLayer::removeTile(RenderPass renderPass, const OverscaledTileID& tileID) {
+    stats.tileDrawablesRemoved += tileLayerGroup->removeDrawables(renderPass, tileID).size();
+}
+
+void RenderCircleLayer::update(const int32_t layerIndex,
+                               gfx::ShaderRegistry& shaders,
+                               gfx::Context& context,
+                               const TransformState& /*state*/,
+                               UniqueChangeRequestVec& changes) {
+    if (enableDefaultRender) {
+        return;
+    }
+
+    std::unique_lock<std::mutex> guard(mutex);
+
+    if (!renderTiles || renderTiles->empty()) {
+        if (tileLayerGroup) {
+            stats.tileDrawablesRemoved += tileLayerGroup->getDrawableCount();
+            tileLayerGroup->clearDrawables();
+        }
+        return;
+    }
+
+    // Set up a layer group
+    if (!tileLayerGroup) {
+        tileLayerGroup = context.createTileLayerGroup(layerIndex, /*initialCapacity=*/64);
+        if (!tileLayerGroup) {
+            return;
+        }
+        tileLayerGroup->setLayerTweaker(std::make_shared<CircleLayerTweaker>(evaluatedProperties));
+        changes.emplace_back(std::make_unique<AddLayerGroupRequest>(tileLayerGroup, /*canReplace=*/true));
+    }
+
+    if (!circleShader) {
+        circleShader = context.getGenericShader(shaders, "CircleShader");
+    }
+
+    std::unordered_set<OverscaledTileID> newTileIDs(renderTiles->size());
+    std::transform(renderTiles->begin(),
+                   renderTiles->end(),
+                   std::inserter(newTileIDs, newTileIDs.begin()),
+                   [](const auto& renderTile) -> OverscaledTileID { return renderTile.get().getOverscaledTileID(); });
+
+    std::unique_ptr<gfx::DrawableBuilder> circleBuilder;
+    std::vector<gfx::DrawablePtr> newTiles;
+    gfx::VertexAttributeArray circleVertexAttrs;
+    auto renderPass = RenderPass::Translucent;
+
+    if (!(mbgl::underlying_type(renderPass) & evaluatedProperties->renderPasses)) {
+        return;
+    }
+
+    tileLayerGroup->observeDrawables([&](gfx::UniqueDrawable& drawable) {
+        const auto tileID = drawable->getTileID();
+        if (tileID && newTileIDs.find(*tileID) == newTileIDs.end()) {
+            // remove it
+            drawable.reset();
+            ++stats.tileDrawablesRemoved;
+        }
+    });
+
+    for (const RenderTile& tile : *renderTiles) {
+        const auto& tileID = tile.getOverscaledTileID();
+
+        auto& tileDrawable = tileLayerGroup->getDrawable(renderPass, tileID);
+        if (tileDrawable) {
+            continue;
+        }
+
+        const LayerRenderData* renderData = getRenderDataForPass(tile, renderPass);
+        if (!renderData) {
+            removeTile(renderPass, tileID);
+            continue;
+        }
+
+        auto& bucket = static_cast<CircleBucket&>(*renderData->bucket);
+
+        std::vector<std::array<int16_t, 2>> rawVerts;
+        const auto buildVertices = [&]() {
+            const std::vector<gfx::VertexVector<gfx::detail::VertexType<gfx::AttributeType<int16_t, 2>>>::Vertex>&
+                verts = bucket.vertices.vector();
+            if (rawVerts.size() < verts.size()) {
+                rawVerts.resize(verts.size());
+                std::transform(verts.begin(), verts.end(), rawVerts.begin(), [](const auto& x) { return x.a1; });
+            }
+        };
+
+        circleVertexAttrs.clear();
+
+        const auto& paintPropertyBinders = bucket.paintPropertyBinders.at(getID());
+
+        if (auto& binder = paintPropertyBinders.get<CircleColor>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_color")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& packedColor = static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 2>>*>(
+                                                  binder->getVertexValue(i))
+                                                  ->a1;
+                    attr->set<gfx::VertexAttribute::float4>(
+                        i, {packedColor[0], packedColor[1], packedColor[0], packedColor[1]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleRadius>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_radius")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& radius = static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 1>>*>(
+                                             binder->getVertexValue(i))
+                                             ->a1;
+                    attr->set<gfx::VertexAttribute::float2>(i, {radius[0], radius[0]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleBlur>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_blur")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& blur = static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 1>>*>(
+                                           binder->getVertexValue(i))
+                                           ->a1;
+                    attr->set<gfx::VertexAttribute::float2>(i, {blur[0], blur[0]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleOpacity>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_opacity")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& opacity = static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 1>>*>(
+                                              binder->getVertexValue(i))
+                                              ->a1;
+                    attr->set<gfx::VertexAttribute::float2>(i, {opacity[0], opacity[0]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleStrokeColor>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_stroke_color")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& packedStrokeColor =
+                        static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 2>>*>(
+                            binder->getVertexValue(i))
+                            ->a1;
+                    attr->set<gfx::VertexAttribute::float4>(
+                        i, {packedStrokeColor[0], packedStrokeColor[1], packedStrokeColor[0], packedStrokeColor[1]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleStrokeWidth>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_stroke_width")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& strokeWidth = static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 1>>*>(
+                                                  binder->getVertexValue(i))
+                                                  ->a1;
+                    attr->set<gfx::VertexAttribute::float2>(i, {strokeWidth[0], strokeWidth[0]});
+                }
+            }
+        }
+        if (auto& binder = paintPropertyBinders.get<CircleStrokeOpacity>()) {
+            const auto count = binder->getVertexCount();
+            if (auto& attr = circleVertexAttrs.getOrAdd("a_stroke_opacity")) {
+                for (std::size_t i = 0; i < count; ++i) {
+                    const auto& strokeOpacity =
+                        static_cast<const gfx::detail::VertexType<gfx::AttributeType<float, 1>>*>(
+                            binder->getVertexValue(i))
+                            ->a1;
+                    attr->set<gfx::VertexAttribute::float2>(i, {strokeOpacity[0], strokeOpacity[0]});
+                }
+            }
+        }
+
+        circleBuilder = context.createDrawableBuilder("circle");
+        circleBuilder->setShader(circleShader);
+        circleBuilder->setColorAttrMode(gfx::DrawableBuilder::ColorAttrMode::None);
+        circleBuilder->setDepthType((renderPass == RenderPass::Opaque) ? gfx::DepthMaskType::ReadWrite
+                                                                       : gfx::DepthMaskType::ReadOnly);
+        circleBuilder->setCullFaceMode(gfx::CullFaceMode::disabled());
+        circleBuilder->setLayerIndex(layerIndex);
+
+        circleBuilder->setRenderPass(renderPass);
+        circleBuilder->setVertexAttributes(circleVertexAttrs);
+
+        buildVertices();
+        circleBuilder->addVertices(rawVerts, 0, rawVerts.size());
+
+        for (const auto& seg : bucket.segments) {
+            circleBuilder->addTriangles(bucket.triangles.vector(), seg.indexOffset, seg.indexLength);
+        }
+
+        circleBuilder->flush();
+
+        for (auto& drawable : circleBuilder->clearDrawables()) {
+            drawable->setTileID(tileID);
+
+            tileLayerGroup->addDrawable(renderPass, tileID, std::move(drawable));
+            ++stats.tileDrawablesAdded;
+        }
+    }
+}
+
 } // namespace mbgl

src/mbgl/renderer/layers/render_circle_layer.hpp

@@ -13,6 +13,15 @@ public:
     explicit RenderCircleLayer(Immutable<style::CircleLayer::Impl>);
     ~RenderCircleLayer() final = default;
 
+    void layerRemoved(UniqueChangeRequestVec&) override;
+
+    /// Generate any changes needed by the layer
+    void update(int32_t layerIndex,
+                gfx::ShaderRegistry&,
+                gfx::Context&,
+                const TransformState&,
+                UniqueChangeRequestVec&) override;
+
 private:
     void transition(const TransitionParameters&) override;
     void evaluate(const PropertyEvaluationParameters&) override;
@@ -28,11 +37,16 @@ private:
                                 const mat4&,
                                 const FeatureState&) const override;
 
+    /// Remove all drawables for the tile from the layer group
+    void removeTile(RenderPass, const OverscaledTileID&);
+
     // Paint properties
     style::CirclePaintProperties::Unevaluated unevaluated;
 
     // Programs
     std::shared_ptr<CircleProgram> circleProgram;
+
+    gfx::ShaderProgramBasePtr circleShader;
 };
 
 } // namespace mbgl

src/mbgl/renderer/layers/render_fill_layer.cpp

@@ -9,6 +9,7 @@
 #include <mbgl/renderer/buckets/fill_bucket.hpp>
 #include <mbgl/renderer/image_manager.hpp>
 #include <mbgl/renderer/layer_group.hpp>
+#include <mbgl/renderer/layers/fill_layer_tweaker.hpp>
 #include <mbgl/renderer/layers/render_fill_layer.hpp>
 #include <mbgl/renderer/paint_parameters.hpp>
 #include <mbgl/renderer/render_source.hpp>
@@ -64,8 +65,9 @@ void RenderFillLayer::evaluate(const PropertyEvaluationParameters& parameters) {
     }
     properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
-
-    evaluatedPropertiesChange = true;
+    if (tileLayerGroup) {
+        tileLayerGroup->setLayerTweaker(std::make_shared<FillLayerTweaker>(evaluatedProperties));
+    }
 }
 
 bool RenderFillLayer::hasTransition() const {
@@ -287,6 +289,10 @@ void RenderFillLayer::update(const int32_t layerIndex,
                              gfx::Context& context,
                              const TransformState& /*state*/,
                              UniqueChangeRequestVec& changes) {
+    if (enableDefaultRender) {
+        return;
+    }
+
     std::unique_lock<std::mutex> guard(mutex);
 
     if (!renderTiles || renderTiles->empty()) {
@@ -303,6 +309,7 @@ void RenderFillLayer::update(const int32_t layerIndex,
         if (!tileLayerGroup) {
             return;
         }
+        tileLayerGroup->setLayerTweaker(std::make_shared<FillLayerTweaker>(evaluatedProperties));
         changes.emplace_back(std::make_unique<AddLayerGroupRequest>(tileLayerGroup, /*canReplace=*/true));
     }
 
@@ -442,16 +449,7 @@ void RenderFillLayer::update(const int32_t layerIndex,
                     }
                 }
 
-                if (evaluatedPropertiesChange) {
-                    // FillLayerUBO fillLayerUBO;
-                    // fillLayerUBO.color = evaluated.get<FillColor>();
-                    // fillLayerUBO.opacity = evaluated.get<FillOpacity>();
-                    // uniformBuffer = context.createUniformBuffer(&fillLayerUBO, sizeof(fillLayerUBO));
-                    evaluatedPropertiesChange = false;
-                }
-
                 if (tileDrawable) {
-                    // tileDrawable->mutableUniformBuffers().addOrReplace("FillLayerUBO", uniformBuffer);
                     continue;
                 }
 

src/mbgl/renderer/render_layer.hpp

@@ -169,8 +169,6 @@ protected:
     TileLayerGroupPtr tileLayerGroup;
 
     std::mutex mutex;
-    bool evaluatedPropertiesChange = false;
-    gfx::UniformBufferPtr uniformBuffer = nullptr;
 
     struct Stats {
         size_t propertyEvaluations = 0;

src/mbgl/renderer/renderer_impl.cpp

@@ -11,6 +11,7 @@
 #include <mbgl/gfx/upload_pass.hpp>
 #include <mbgl/gl/drawable_gl.hpp>
 #include <mbgl/programs/programs.hpp>
+#include <mbgl/renderer/layer_tweaker.hpp>
 #include <mbgl/renderer/pattern_atlas.hpp>
 #include <mbgl/renderer/renderer_observer.hpp>
 #include <mbgl/renderer/render_static_data.hpp>
@@ -106,6 +107,13 @@ void Renderer::Impl::render(const RenderTree& renderTree) {
         }
     }
 
+    // Run layer tweakers to update any dynamic elements
+    orchestrator.observeLayerGroups([&](LayerGroup& layerGroup) {
+        if (layerGroup.getLayerTweaker()) {
+            layerGroup.getLayerTweaker()->execute(layerGroup, parameters);
+        }
+    });
+
     // Give the layers a chance to do setup
     orchestrator.observeLayerGroups([&](LayerGroup& layerGroup) { layerGroup.preRender(orchestrator, parameters); });
 
@@ -200,9 +208,6 @@ void Renderer::Impl::render(const RenderTree& renderTree) {
         for (auto it = layerRenderItems.rbegin(); it != layerRenderItems.rend(); ++it, ++i) {
             parameters.currentLayer = i;
             const RenderItem& renderItem = it->get();
-            if (renderItem.getName() == "background") {
-                continue;
-            }
             if (renderItem.hasRenderPass(parameters.pass)) {
                 const auto layerDebugGroup(parameters.renderPass->createDebugGroup(renderItem.getName().c_str()));
                 renderItem.render(parameters);