From 20810f988a735e0d43f9abff9260ea0784cd218c Mon Sep 17 00:00:00 2001
From: Ivo van Dongen <info@ivovandongen.nl>
Date: Thu, 4 May 2017 16:01:16 +0300
Subject: [core] render light

---
 src/mbgl/map/map.cpp               |  4 ++--
 src/mbgl/renderer/painter.cpp      |  2 +-
 src/mbgl/renderer/render_light.cpp | 25 +++++++++++++++++++++++++
 src/mbgl/renderer/render_light.hpp | 18 ++++++++++++++++++
 src/mbgl/style/style.cpp           | 24 +++++++++++++++++++-----
 src/mbgl/style/style.hpp           | 11 +++++++----
 6 files changed, 72 insertions(+), 12 deletions(-)
 create mode 100644 src/mbgl/renderer/render_light.cpp

(limited to 'src/mbgl')

diff --git a/src/mbgl/map/map.cpp b/src/mbgl/map/map.cpp
index bba6d50a98..52ac323df4 100644
--- a/src/mbgl/map/map.cpp
+++ b/src/mbgl/map/map.cpp
@@ -967,7 +967,7 @@ void Map::setLight(std::unique_ptr<style::Light> light) {
         return;
     }
 
-    impl->style->light = std::move(light);
+    impl->style->setLight(std::move(light));
 }
 
 style::Light* Map::getLight() {
@@ -975,7 +975,7 @@ style::Light* Map::getLight() {
         return nullptr;
     }
 
-    return impl->style->light.get();
+    return impl->style->getLight();
 }
 
 #pragma mark - Defaults
diff --git a/src/mbgl/renderer/painter.cpp b/src/mbgl/renderer/painter.cpp
index 60c4757893..eed3bfcd8b 100644
--- a/src/mbgl/renderer/painter.cpp
+++ b/src/mbgl/renderer/painter.cpp
@@ -144,7 +144,7 @@ void Painter::render(const Style& style, const FrameData& frame_, View& view, Sp
     spriteAtlas = style.spriteAtlas.get();
     lineAtlas = style.lineAtlas.get();
 
-    evaluatedLight = style.evaluatedLight;
+    evaluatedLight = style.getRenderLight()->getEvaluated();
 
     RenderData renderData = style.getRenderData(frame.debugOptions, state.getAngle());
     const std::vector<RenderItem>& order = renderData.order;
diff --git a/src/mbgl/renderer/render_light.cpp b/src/mbgl/renderer/render_light.cpp
new file mode 100644
index 0000000000..6f154de2e2
--- /dev/null
+++ b/src/mbgl/renderer/render_light.cpp
@@ -0,0 +1,25 @@
+#include <mbgl/renderer/render_light.hpp>
+
+namespace mbgl {
+
+RenderLight::RenderLight(const style::Light light_)
+        : light(std::move(light_)) {
+}
+
+void RenderLight::transition(const CascadeParameters& parameters) {
+    transitioning = TransitioningLight(light, std::move(transitioning), parameters);
+}
+
+void RenderLight::evaluate(const PropertyEvaluationParameters& parameters) {
+    evaluated = EvaluatedLight(transitioning, parameters);
+}
+
+bool RenderLight::hasTransition() const {
+    return transitioning.hasTransition();
+}
+
+const EvaluatedLight& RenderLight::getEvaluated() const {
+    return evaluated;
+}
+
+} // namespace mbgl
diff --git a/src/mbgl/renderer/render_light.hpp b/src/mbgl/renderer/render_light.hpp
index 8f59299552..e609550445 100644
--- a/src/mbgl/renderer/render_light.hpp
+++ b/src/mbgl/renderer/render_light.hpp
@@ -69,4 +69,22 @@ public:
 using TransitioningLight = Transitioning<style::LightProperties>;
 using EvaluatedLight     = Evaluated<style::LightProperties>;
 
+class Painter;
+
+class RenderLight {
+public:
+    RenderLight(const style::Light);
+
+    void transition(const CascadeParameters&);
+    void evaluate(const PropertyEvaluationParameters&);
+    bool hasTransition() const;
+
+    const EvaluatedLight& getEvaluated() const;
+
+private:
+    TransitioningLight transitioning;
+    EvaluatedLight evaluated;
+    style::Light light;
+};
+
 } // namespace mbgl
diff --git a/src/mbgl/style/style.cpp b/src/mbgl/style/style.cpp
index 63fb602616..080911b746 100644
--- a/src/mbgl/style/style.cpp
+++ b/src/mbgl/style/style.cpp
@@ -59,6 +59,7 @@ Style::Style(Scheduler& scheduler_, FileSource& fileSource_, float pixelRatio)
       spriteAtlas(std::make_unique<SpriteAtlas>(Size{ 1024, 1024 }, pixelRatio)),
       lineAtlas(std::make_unique<LineAtlas>(Size{ 256, 512 })),
       light(std::make_unique<Light>()),
+      renderLight(std::make_unique<RenderLight>(*light)),
       observer(&nullObserver) {
     glyphAtlas->setObserver(this);
     spriteAtlas->setObserver(this);
@@ -147,7 +148,7 @@ void Style::setJSON(const std::string& json) {
     defaultZoom = parser.zoom;
     defaultBearing = parser.bearing;
     defaultPitch = parser.pitch;
-    light = std::make_unique<Light>(parser.light);
+    setLight(std::make_unique<Light>(parser.light));
 
     glyphAtlas->setURL(parser.glyphURL);
     spriteAtlas->load(parser.spriteURL, scheduler, fileSource);
@@ -310,6 +311,19 @@ void Style::removeRenderLayer(const std::string& id) {
     }
 }
 
+void Style::setLight(std::unique_ptr<Light> light_) {
+    light = std::move(light_);
+    renderLight = std::make_unique<RenderLight>(*light);
+}
+
+Light* Style::getLight() const {
+    return light.get();
+}
+
+RenderLight* Style::getRenderLight() const {
+    return renderLight.get();
+}
+
 std::string Style::getName() const {
     return name;
 }
@@ -364,11 +378,11 @@ void Style::update(const UpdateParameters& parameters) {
     const bool evaluate = cascade || zoomChanged || parameters.updateFlags & Update::RecalculateStyle;
 
     if (cascade) {
-        transitioningLight = TransitioningLight(*light, std::move(transitioningLight), cascadeParameters);
+        renderLight->transition(cascadeParameters);
     }
 
-    if (evaluate || transitioningLight.hasTransition()) {
-        evaluatedLight = EvaluatedLight(transitioningLight, evaluationParameters);
+    if (evaluate || renderLight->hasTransition()) {
+        renderLight->evaluate(evaluationParameters);
     }
 
     for (const auto& renderSource : renderSources) {
@@ -443,7 +457,7 @@ RenderSource* Style::getRenderSource(const std::string& id) const {
 }
 
 bool Style::hasTransitions() const {
-    if (transitioningLight.hasTransition()) {
+    if (renderLight->hasTransition()) {
         return true;
     }
 
diff --git a/src/mbgl/style/style.hpp b/src/mbgl/style/style.hpp
index 7024927db4..2756be1edd 100644
--- a/src/mbgl/style/style.hpp
+++ b/src/mbgl/style/style.hpp
@@ -101,6 +101,10 @@ public:
     bool hasClass(const std::string&) const;
     std::vector<std::string> getClasses() const;
 
+    void setLight(std::unique_ptr<Light>);
+    Light* getLight() const;
+    RenderLight* getRenderLight() const;
+
     RenderData getRenderData(MapDebugOptions, float angle) const;
 
     std::vector<Feature> queryRenderedFeatures(const ScreenLineString& geometry,
@@ -118,10 +122,6 @@ public:
     std::unique_ptr<SpriteAtlas> spriteAtlas;
     std::unique_ptr<LineAtlas> lineAtlas;
 
-    std::unique_ptr<Light> light;
-    TransitioningLight transitioningLight;
-    EvaluatedLight evaluatedLight;
-
     RenderSource* getRenderSource(const std::string& id) const;
 
 private:
@@ -133,6 +133,9 @@ private:
     std::vector<std::string> classes;
     TransitionOptions transitionOptions;
 
+    std::unique_ptr<Light> light;
+    std::unique_ptr<RenderLight> renderLight;
+
     // Defaults
     std::string name;
     LatLng defaultLatLng;
-- 
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